WO2023155275A1

WO2023155275A1 - Pressure regulating system and pressure regulating system control method

Info

Publication number: WO2023155275A1
Application number: PCT/CN2022/084145
Authority: WO
Inventors: 王文书; 邹江磊; 吴琼; 查万春
Original assignee: 烟台杰瑞石油装备技术有限公司
Priority date: 2022-02-21
Filing date: 2022-03-30
Publication date: 2023-08-24
Also published as: CN114370609A

Abstract

A pressure regulating system and a pressure regulating system control method. The pressure regulating system comprises a fluid inlet (100) and a fluid outlet (200). The pressure regulating system further comprises: a pressure regulating loop (1), two ends of the pressure regulating loop being respectively communicated with the fluid inlet and the fluid outlet; an automatic valve (2) which is arranged at an inlet end of the pressure regulating loop and is communicated with the pressure regulating loop; a first cut-off valve (3) which is arranged on the pressure regulating loop and is communicated with the pressure regulating loop, an inlet end of the first cut-off valve being communicated with the fluid inlet; and a pressure regulating assembly (4) which is arranged on the pressure regulating loop and is communicated with the pressure regulating loop, the pressure regulating assembly being located at the end of the automatic valve away from the first cut-off valve. The pressure regulating system and the pressure regulating system control method can exert a protective effect on the subsequent pressure regulating assembly, so that a fluid cannot be directly flushed into the pressure regulating assembly and thus cause damage to components, especially a pressure regulating valve in the pressure regulating assembly, thereby prolonging the service life of the pressure regulating valve.

Description

Pressure regulating system and method for controlling the pressure regulating system

This application claims the priority of the patent application submitted to the State Intellectual Property Office of China on February 21, 2022, with the application number 202210159225.6 and the title of the invention "pressure regulation system and control method of the pressure regulation system".

technical field

The present application relates to the technical field of fluid pressure regulation, in particular, to a pressure regulation system and a control method of the pressure regulation system.

Background technique

At present, when gaseous fuel or other fluids are used as the working medium, the pressure difference between the supply pressure and the working pressure of the fluid is large, and it is usually necessary to set up a separate pressure regulating circuit to adjust the pressure of the fluid to facilitate the use in different occasions.

In the existing pressure regulating circuit, it is usually necessary to manually switch the pressure regulating circuit or manually control the opening of the valve in the pressure regulating circuit to realize the safe cut-in of the pressure regulating circuit; however, manual control depends on the operating skills and experience of the personnel. Limitation, slow switching speed, cannot meet the response time requirements of the equipment, and the components of the voltage regulator in the pressure regulating system switch quickly, and are easily damaged when a large pressure difference impacts, which affects the service life of the voltage regulator. In some pressure regulating systems in the prior art, the valve parts cannot adapt to the short time and large pressure difference impact caused by relying on manual control, which is affected by different operating experience of operators, high error probability, long cut-in time, valve parts It is easy to be damaged by a large impact, which will affect the service life of the voltage regulator.

Contents of the invention

The main purpose of the present application is to provide a pressure regulation system and a control method of the pressure regulation system, so as to solve the problem of low service life of the pressure regulator in the pressure regulation system in the prior art.

In order to achieve the above object, according to one aspect of the present application, a pressure regulation system is provided, including a fluid inlet and a fluid outlet. Connected; the automatic valve is arranged on the inlet end of the pressure regulating circuit and communicated with the pressure regulating circuit; the first cut-off valve is arranged on the pressure regulating circuit and communicated with the pressure regulating circuit, and the inlet end of the first cut-off valve is connected with the fluid inlet; The pressure regulating assembly is arranged on the pressure regulating circuit and communicated with the pressure regulating circuit, and the pressure regulating assembly is located at the end of the automatic valve away from the first cut-off valve.

Further, the pressure regulation system further includes: a safety circuit, which is arranged at the outlet end of the pressure regulation circuit, and the safety circuit is connected with the pressure regulation circuit; a protection valve is arranged on the safety circuit, and the protection valve is connected with the safety circuit.

Further, the protective valve includes a safety valve and a first vent valve, the safety circuit includes a first branch and a second branch arranged in parallel, a safety valve is provided on the first branch, and a first vent valve is provided on the second branch; The safety circuit also includes: a first converging main road, the inlet end of the first converging main road communicates with the pressure regulating circuit, and the outlet end of the first converging main road communicates with the first branch circuit and the second branch circuit respectively.

Further, the safety circuit also includes: a second main flow confluence, the inlet ends of the second main flow confluence communicate with the first branch and the second branch respectively, and the outlet end of the second main flow confluence communicates with the fluid inlet; the third The two ends of the third branch are connected with the second converging main road and the pressure regulating circuit respectively, and the second vent valve is arranged on the third branch.

Further, the pressure regulation system also includes: a first inflow branch, which is arranged in parallel with the pressure regulation circuit, and the two ends of the first inflow branch are respectively communicated with the pressure regulation circuit, and the inlet end of the first inflow branch is located at the first shut-off valve On the fluid inlet side, the outlet end of the first inflow branch is located between the first shut-off valve and the automatic valve; the second shut-off valve is arranged on the first inflow branch and communicated with the first inflow branch.

Further, the pressure regulation system also includes: a second inflow branch, which is arranged in parallel with the pressure regulation circuit, and the two ends of the second inflow branch are connected with the pressure regulation circuit respectively, and the inlet port of the second inflow branch is located at the first cut-off valve Between the automatic valve and the outlet port of the second inflow branch is located on the fluid outlet side of the automatic valve; the third cut-off valve is arranged on the second inflow branch and communicated with the second inflow branch.

Further, a PID adjustment module is arranged in the automatic valve.

Further, the pressure regulation assembly includes: a fourth cut-off valve, which is arranged on the pressure regulation circuit and communicated with the pressure regulation circuit; It communicates with the fourth cut-off valve and the pressure regulating circuit.

Further, the pressure regulating assembly also includes: a pressure regulating valve, which is arranged on the pressure regulating circuit, and the pressure regulating valve is located at the outlet end of the fourth cut-off valve; a pressure guiding pipeline, which is arranged in parallel with the pressure regulating circuit, and Both ends of the pipeline communicate with the pressure regulating valve and the pressure regulating circuit respectively; the outlet end of the pressure regulating pipeline is located at the fluid outlet side of the pressure guiding pipeline.

Further, there are multiple pressure regulating valves, and the multiple pressure regulating valves are sequentially arranged on the pressure regulating circuit along the flow direction of the fluid; there are multiple pressure guiding pipelines, and the multiple pressure guiding pipelines and the multiple pressure regulating valves Set accordingly.

Further, the multiple pressure regulating valves include a first pressure regulating valve and a second pressure regulating valve arranged in sequence along the flow direction of the fluid, and the multiple pressure introduction pipelines include a first pressure introduction pipeline and a second pressure introduction pipeline; The first pressure introduction pipeline communicates with the first pressure regulating valve, and the second pressure introduction pipeline communicates with the second pressure regulating valve; wherein, the outlet end of the first pressure introduction pipeline is located on the fluid outlet side of the second pressure introduction pipeline , the outlet end of the pressure regulation pipeline is located on the fluid outlet side of the first pressure introduction pipeline.

Further, the multiple pressure regulating valves include a first pressure regulating valve and a second pressure regulating valve arranged in sequence along the flow direction of the fluid, and the multiple pressure introduction pipelines include a first pressure introduction pipeline and a second pressure introduction pipeline; The first pressure introduction pipeline communicates with the first pressure regulating valve, and the second pressure introduction pipeline communicates with the second pressure regulating valve; wherein, the outlet end of the first pressure introduction pipeline is located at the fluid inlet side of the second pressure regulating valve, The outlet end of the pressure regulation pipeline is located at the fluid outlet side of the second pressure introduction pipeline.

Further, the multiple pressure regulating valves include a first pressure regulating valve and a second pressure regulating valve arranged in sequence along the flow direction of the fluid, and the multiple pressure introduction pipelines include a first pressure introduction pipeline and a second pressure introduction pipeline; The first pressure introduction pipeline communicates with the first pressure regulating valve, and the second pressure introduction pipeline communicates with the second pressure regulating valve; wherein, the outlet end of the first pressure introduction pipeline is located at the fluid inlet side of the second pressure regulating valve, The outlet end of the pressure regulating pipeline is located between the outlet end of the first pressure guiding pipeline and the inlet end of the second pressure regulating valve.

Further, there are multiple fourth shut-off valves, and the multiple fourth shut-off valves are arranged in sequence along the flow direction of the fluid. There are multiple pressure regulating pipelines, and the multiple pressure regulating pipelines correspond to the multiple fourth shut-off valves one by one. set up.

Further, the plurality of fourth shut-off valves include a first unit shut-off valve and a second unit shut-off valve arranged in sequence along the flow direction of the fluid, and the plurality of pressure-regulating pipelines include a first pressure-regulating pipeline and a second pressure-regulating pipeline , the first pressure-regulating pipeline communicates with the first unit shut-off valve, and the second pressure-regulating pipeline communicates with the second unit shut-off valve; the plurality of pressure-regulating valves include the first pressure-regulating valve and the second unit that are sequentially arranged along the flow direction of the fluid Two pressure regulating valves, a plurality of pressure guiding pipelines include a first pressure guiding pipeline and a second pressure guiding pipeline; the first pressure guiding pipeline communicates with the first pressure regulating valve, and the second pressure guiding pipeline communicates with the second pressure regulating The pressure valve is connected; wherein, the outlet end of the first pressure guiding pipeline is located at the fluid inlet side of the second pressure regulating valve, and the outlet end of the second pressure regulating pipeline is located at the fluid outlet side of the first pressure guiding pipeline and the second regulating valve. Between the fluid inlet sides of the pressure valve, the outlet end of the first pressure regulating pipeline is located at the fluid outlet side of the second pressure introduction pipeline.

According to another aspect of the present application, there is provided a pressure regulating system control method, which is suitable for the above pressure regulating system. The pressure regulating system control method includes: adjusting the first cut-off valve to a first predetermined opening value; opening the automatic valve; Continue to open the first shut-off valve to the maximum opening.

Further, the method for obtaining the predetermined opening value includes: after receiving the pressure regulation instruction, detecting the instantaneous pressure value of the fluid at the fluid inlet, and detecting the current opening value of the first cut-off valve; comparing the instantaneous pressure value with the Compared with the preset pressure threshold value, when the instantaneous pressure value is within the range of the pressure threshold value, the interpolation method is used to determine the allowable opening value of the first cut-off valve corresponding to the instantaneous pressure value to allow fluid to pass through; the current opening value and the allowable opening value When the difference between the current opening value and the allowable opening value is less than or equal to the preset difference ratio, the current opening value is the first predetermined opening value.

Further, the control method of the pressure regulation system further includes: after the first cut-off valve operates at the first predetermined opening value for a predetermined period of time; opening the first cut-off valve to a maximum opening.

Further, the pressure regulating system is the above-mentioned pressure regulating system, and the control method of the pressure regulating system further includes: detecting the instantaneous pressure value of the fluid inlet, opening the first shut-off valve to a second predetermined opening value; opening the second shut-off valve and the third shut-off valve. Cut-off valve; open the automatic valve; open the first cut-off valve to the maximum opening.

Applying the technical solution of the present application, the pressure regulation system includes a fluid inlet and a fluid outlet, wherein the pressure regulation system also includes: a pressure regulation circuit, the two ends of the pressure regulation circuit are connected with the fluid inlet and the fluid outlet respectively; The inlet port of the pressure circuit is communicated with the pressure regulating circuit; the first shut-off valve is arranged on the pressure regulating circuit and communicated with the pressure regulating circuit, and the inlet port of the first shut-off valve is connected with the fluid inlet; the pressure regulating component is arranged on the pressure regulating circuit On the circuit and communicated with the pressure regulating circuit, the pressure regulating assembly is located at the end of the automatic valve away from the first cut-off valve. By setting the first shut-off valve and the automatic valve on the pressure regulation circuit, after receiving the pressure regulation instruction, the openings of the first cut-off valve and the automatic valve are respectively adjusted to adapt to the change of the fluid pressure in the pressure regulation circuit, and the follow-up The pressure regulating component of the pressure regulating component plays a protective role, and the fluid will not directly rush into the pressure regulating component to cause damage to components, especially the pressure regulating valve in the pressure regulating component. This setting prolongs the service life of the pressure regulating valve.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application, and do not constitute an improper limitation of the present application. In the attached picture:

Fig. 1 shows the schematic structural view of the first embodiment of the pressure regulating system according to the present application;

Figure 2 shows a partial enlarged view of the pressure regulation system according to Figure 1;

Fig. 3 shows the structural representation of the second embodiment of the pressure regulation system according to the present application;

Figure 4 shows a partial enlarged view of the pressure regulation system according to Figure 2;

FIG. 5 shows a schematic structural view of a first embodiment of a pressure regulating assembly in a pressure regulating system according to the present application;

FIG. 6 shows a schematic structural view of a second embodiment of the pressure regulating assembly in the pressure regulating system according to the present application;

FIG. 7 shows a schematic structural view of a third embodiment of the pressure regulating assembly in the pressure regulating system according to the present application;

FIG. 8 shows a schematic structural view of a fourth embodiment of the pressure regulating assembly in the pressure regulating system according to the present application;

FIG. 9 shows a schematic structural view of a fifth embodiment of the pressure regulating assembly in the pressure regulating system according to the present application;

Fig. 10 shows the control flow diagram of the first embodiment of the pressure regulating system control method according to the present application;

Fig. 11 shows the control flowchart of the second embodiment of the control method of the pressure regulating system according to the present application;

Fig. 12 shows a control flow chart of the third embodiment of the control method of the pressure regulating system according to the present application.

Wherein, the above-mentioned accompanying drawings include the following reference signs:

100, fluid inlet; 200, fluid outlet; 300: inlet collection pipe; 400, outlet collection pipe;

1. Pressure regulating circuit; 2. Automatic valve; 3. First shut-off valve; 4. Pressure regulating component; 40. Fourth shut-off valve; 401. First unit shut-off valve; 402. Second unit shut-off valve; 41. Adjustment Pressure pipeline; 411, first pressure regulating pipeline; 412, second pressure regulating pipeline; 42, pressure regulating valve; 421, first pressure regulating valve; 422, second pressure regulating valve; 43, pressure introduction pipeline ; 431, the first pressure introduction pipeline; 432, the second pressure introduction pipeline;

5. Safety loop; 51. First branch; 52. Second branch; 510. Safety valve; 520. First vent valve; Three branches; 550, the second vent valve; 6, the first inflow branch; 60, the second shut-off valve; 7, the second inflow branch; 70, the third shut-off valve;

30. Valve position sensor.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

Please refer to Fig. 1 to Fig. 9, the present application provides a kind of pressure regulation system, comprises fluid inlet 100 and fluid outlet 200, and pressure regulation system also includes: pressure regulation circuit 1, and the two ends of pressure regulation circuit 1 are respectively connected with fluid inlet 100 It communicates with the fluid outlet 200; the automatic valve 2 is set at the inlet end of the pressure regulating circuit 1 and communicates with the pressure regulating circuit 1; the first block valve 3 is set on the pressure regulating circuit 1 and communicates with the pressure regulating circuit 1, and the first The inlet end of the shut-off valve 3 communicates with the fluid inlet 100; the pressure regulating assembly 4 is arranged on the pressure regulating circuit 1 and communicates with the pressure regulating circuit 1, and the pressure regulating assembly 4 is located at the end of the automatic valve 2 away from the first shut-off valve 3.

In the first embodiment provided by the present application, as shown in Figure 1 and Figure 2, the pressure regulating system provided according to the present application includes a fluid inlet 100 and a fluid outlet 200, wherein the pressure regulating system further includes: a pressure regulating circuit 1. The two ends of the pressure regulating circuit 1 are respectively connected with the fluid inlet 100 and the fluid outlet 200; the automatic valve 2 is set at the inlet end of the pressure regulating circuit 1 and communicated with the pressure regulating circuit 1; the first cut-off valve 3 is set at the regulating On the pressure regulating circuit 1 and communicated with the pressure regulating circuit 1, the inlet port of the first shut-off valve 3 communicates with the fluid inlet 100; the pressure regulating assembly 4 is arranged on the pressure regulating circuit 1 and communicates with the pressure regulating circuit 1, and the pressure regulating assembly 4 Located at the end of the automatic valve 2 away from the first shut-off valve 3 . By setting the first cut-off valve 3 and the automatic valve 2 on the pressure regulation circuit 1, after receiving the pressure regulation instruction, the openings of the first cut-off valve 3 and the automatic valve 2 are respectively adjusted to adapt to the fluid pressure in the pressure regulation circuit. The change can protect the subsequent pressure regulating assembly 4, and the fluid will not directly rush into the pressure regulating assembly 4 and cause damage to components, especially the pressure regulating valve in the pressure regulating assembly 4. This setting prolongs the pressure regulation service life of the valve.

Preferably, there are multiple pressure regulating circuits 1, and the multiple pressure regulating circuits 1 are arranged in parallel, and any one of the multiple pressure regulating circuits 1 can be opened according to actual needs. Wherein, the pressure regulating system also includes an inlet manifold 300 and an outlet manifold 400. The fluid inlet 100 is arranged on the inlet manifold 300. The fluid is fed into each pressure regulating circuit 1 respectively; the outlet end of each pressure regulating circuit 1 is connected with the outlet collecting pipe 400 , and the fluid flowing out of each pressure regulating circuit 1 is collected through the outlet collecting pipe 400 .

In order to ensure the safety of the pressure regulating circuit 1 and avoid damage to the pressure regulating circuit caused by excessive fluid pressure, the pressure regulating system also includes: a safety circuit 5, which is set at the outlet of the pressure regulating circuit 1, and the safety circuit 5 and the pressure regulating circuit 1 Connected; the safety circuit 5 is provided with a protective valve, and the protective valve communicates with the safety circuit 5 . Through the protective valve, part of the fluid is released when the fluid pressure is too high, so as to protect the pressure regulating circuit 1.

In a specific implementation, the protection valve includes a safety valve 510 and a first vent valve 520, the safety circuit 5 includes a first branch 51 and a second branch 52 arranged in parallel, the first branch 51 is provided with a safety valve 510, and the first branch 51 is provided with a safety valve 510. The second branch 52 is provided with a first vent valve 520; the safety circuit 5 also includes: a first converging main road 53, the inlet end of the first converging main road 53 communicates with the pressure regulating circuit 1, and the outlet of the first converging main road 53 The ends communicate with the first branch 51 and the second branch 52, respectively. The safety circuit 5 also includes: a second trunk road 54, the inlet end of the second trunk road 54 communicates with the first branch 51 and the second branch 52 respectively, and the outlet end of the second trunk road 54 communicates with the fluid inlet 100 Communication; the third branch 55, the two ends of the third branch 55 are respectively connected with the second converging trunk 54 and the pressure regulating circuit 1, and the third branch 55 is provided with a second vent valve 550. When the fluid pressure in the pressure regulating circuit 1 is too high, the safety valve 510 is opened, and part of the fluid flows through the safety valve 510 to the second converging main road 54, and then flows back to the fluid inlet for the next cycle; when the fluid pressure reaches At a certain height, one or all of the first vent valve 520 or the second vent valve 550 is opened to release part of the fluid.

In the second embodiment provided by this application, as shown in Figure 3 and Figure 4, this embodiment is an improvement made on the basis of the first embodiment, specifically, the pressure regulating system also includes: the first The inflow branch 6 is arranged in parallel with the pressure regulating circuit 1, and the two ends of the first inflow branch 6 communicate with the pressure regulating circuit 1 respectively, and the inlet end of the first inflow branch 6 is located at the fluid inlet side of the first shut-off valve 3, The outlet end of the first inflow branch 6 is located between the first shut-off valve 3 and the automatic valve 2 ; the second shut-off valve 60 is arranged on the first inflow branch 6 and communicates with the first inflow branch 6 . In this way, when the fluid flows into the pressure regulating circuit 1 , part of the fluid pressure in the first shut-off valve 3 is shared by the second cut-off valve 60 , so as to protect the first shut-off valve 3 .

Further, the pressure regulation system also includes: a second inflow branch 7, which is arranged in parallel with the pressure regulation circuit 1, the two ends of the second inflow branch 7 communicate with the pressure regulation circuit 1 respectively, and the inlet end of the second inflow branch 7 Located between the first cut-off valve 3 and the automatic valve 2, the outlet end of the second inflow branch 7 is located on the fluid outlet side of the automatic valve 2; the third cut-off valve 70 is arranged on the second inflow branch 7 and connected to the second The inflow branch 7 is connected. The automatic valve 2 is protected by the third shut-off valve 70. When the fluid enters the pressure regulating circuit 1, the second shut-off valve 60 and the third shut-off valve 70 are opened to prevent the opening of the first shut-off valve 3 from being too small to bear. Fluid pressure condition.

In the third embodiment provided by the present application, this embodiment is an improvement made on the basis of the second embodiment, specifically, the automatic valve 2 is provided with a PID adjustment module. By setting the PID adjustment module in the automatic valve 2, the automatic valve 2 has a PID adjustment function. When the first shut-off valve 3, the second shut-off valve 60 and the third shut-off valve 70 on the pressure regulating circuit 1 are fully opened, Realize automatic adjustment of the opening degree of the automatic valve 2 according to different inlet and outlet pressure differences, and gradually open automatically to realize the safe inflow of fluid.

In this application, the pressure regulating assembly 4 has different implementations, and the following different implementations of the pressure regulating assembly 4 are applicable to any one of the above-mentioned embodiments 1 to 3, specifically: the pressure regulating assembly 4 includes: the fourth The cut-off valve 40 is arranged on the pressure regulating circuit 1 and communicated with the pressure regulating circuit 1; the pressure regulating pipeline 41 is arranged in parallel with the pressure regulating circuit 1, and the two ends of the pressure regulating pipeline 41 are respectively connected to the fourth The cut-off valve 40 communicates with the pressure regulating circuit 1 .

In the first embodiment of the pressure regulating assembly 4, as shown in FIG. Outlet port; pressure introduction pipeline 43, which is arranged in parallel with pressure regulation circuit 1, and the two ends of pressure introduction pipeline 43 are connected with pressure regulating valve 42 and pressure regulation circuit 1 respectively; the outlet of pressure regulation pipeline 41 The end is located on the fluid outlet side of the pressure introduction line 43 . In this way, when the fluid pressure is too high, the bypass line of the fourth cut-off valve 40 is opened, and part of the fluid flows into the pressure regulating circuit 1 through the pressure introduction line 43 over the pressure regulating valve 42, and the other part of the fluid is passed through the pressure regulating valve 42. To adjust the pressure, in the actual application process, in order to ensure that the pressure at the outlet of the fluid is the required pressure value, the pressure of another part of the fluid in the pressure regulating valve 42 will be lower than the predetermined pressure in the system, so that after being adjusted by the pressure regulating valve 42 The pressure at the fluid outlet 200 can only be guaranteed to be the required pressure when the fluid under pressure merges with the fluid in the pressure introduction pipeline 43 .

In the second embodiment of the pressure regulating assembly 4, as shown in Figure 6, there are multiple pressure regulating valves 42, and the plurality of pressure regulating valves 42 are sequentially arranged on the pressure regulating circuit 1 along the flow direction of the fluid; There are multiple passages 43 , and the multiple pressure introduction pipelines 43 are set in one-to-one correspondence with the multiple pressure regulating valves 42 .

Among them, the present embodiment uses two pressure-regulating valves as an example. The multiple pressure-regulating valves 42 include a first pressure-regulating valve 421 and a second pressure-regulating valve 422 arranged in sequence along the flow direction of the fluid, and multiple pressure-inducing pipelines 43 Including a first pressure introduction pipeline 431 and a second pressure introduction pipeline 432; the first pressure introduction pipeline 431 communicates with the first pressure regulating valve 421, and the second pressure introduction pipeline 432 communicates with the second pressure regulating valve 422; wherein The outlet end of the first pressure introduction pipeline 431 is located at the fluid outlet side of the second pressure introduction pipeline 432 , and the outlet end of the pressure regulation pipeline 41 is located at the fluid outlet side of the first pressure introduction pipeline 431 . In this way, the first pressure regulating valve 421 and the second pressure regulating valve 422 are used to regulate the pressure of the fluid. One part of the fluid is regulated by the first pressure regulating valve 421, and the other part of the fluid is regulated by the second pressure regulating valve 422. To protect each pressure regulating valve.

In the third embodiment of the pressure regulating assembly 4, as shown in Figure 7, there are multiple pressure regulating valves 42, and the plurality of pressure regulating valves 42 are sequentially arranged on the pressure regulating circuit 1 along the flow direction of the fluid; There are multiple passages 43 , and the multiple pressure introduction pipelines 43 are set in one-to-one correspondence with the multiple pressure regulating valves 42 .

In this embodiment, two pressure regulating valves are used as an example. The multiple pressure regulating valves 42 include a first pressure regulating valve 421 and a second pressure regulating valve 422 arranged in sequence along the flow direction of the fluid. A pressure introduction pipeline 431 and a second pressure introduction pipeline 432; the first pressure introduction pipeline 431 communicates with the first pressure regulating valve 421, and the second pressure introduction pipeline 432 communicates with the second pressure regulating valve 422; The outlet end of a pressure guiding pipeline 431 is located at the fluid inlet side of the second pressure regulating valve 422 , and the outlet end of the pressure regulating pipeline 41 is located at the fluid outlet side of the second pressure guiding pipeline 432 . In this way, the staged pressure regulation of the fluid is set, the first pressure regulation valve 421 is used for the first pressure regulation of the fluid, and the second pressure regulation valve 422 is used for the second pressure regulation of the fluid, so as to achieve the protection of each pressure regulating valve 42 Purpose.

In the fourth embodiment of the pressure regulating assembly 4, as shown in Figure 8, there are multiple pressure regulating valves 42, and the plurality of pressure regulating valves 42 are sequentially arranged on the pressure regulating circuit 1 along the flow direction of the fluid; There are multiple passages 43 , and the multiple pressure introduction pipelines 43 are set in one-to-one correspondence with the multiple pressure regulating valves 42 .

In this embodiment, two pressure regulating valves are used as an example. The multiple pressure regulating valves 42 include a first pressure regulating valve 421 and a second pressure regulating valve 422 arranged in sequence along the flow direction of the fluid. A pressure introduction pipeline 431 and a second pressure introduction pipeline 432; the first pressure introduction pipeline 431 communicates with the first pressure regulating valve 421, and the second pressure introduction pipeline 432 communicates with the second pressure regulating valve 422; The outlet end of a pressure guiding pipeline 431 is located on the fluid inlet side of the second pressure regulating valve 422 , and the outlet end of the pressure regulating pipeline 41 is located between the outlet end of the first pressure guiding pipeline 431 and the inlet end of the second pressure regulating valve 422 between. In this way, the staged pressure regulation of the fluid is set. The first pressure regulating valve 421 is used to regulate the pressure of the fluid for the first time, and the second pressure regulating valve 422 is used to regulate the pressure of the fluid for the second time. When the pressure circuit is on, it merges with the fluid in the first pressure introduction pipeline 431 , and further, uses the second pressure regulating valve 422 to regulate the pressure to protect each pressure regulating valve 42 .

In the fifth embodiment of the pressure regulating assembly 4, as shown in FIG. 9 , there are multiple fourth shut-off valves 40, and the multiple fourth shut-off valves 40 are sequentially arranged along the flow direction of the fluid, and the pressure regulating pipeline 41 is multiple. One, a plurality of pressure regulating pipelines 41 and a plurality of fourth cut-off valves 40 are provided in one-to-one correspondence.

In this embodiment, two fourth shut-off valves 40 and two pressure regulating valves 42 are taken as examples. The plurality of fourth shut-off valves 40 include a first unit shut-off valve 401 and a second unit shut-off valve 402 arranged in sequence along the flow direction of the fluid. , the multiple pressure regulating pipelines 41 include a first pressure regulating pipeline 411 and a second pressure regulating pipeline 412, the first pressure regulating pipeline 411 communicates with the first unit shut-off valve 401, the second pressure regulating pipeline 412 communicates with the second pressure regulating pipeline 412 The two unit cut-off valves 402 are connected; the plurality of pressure regulating valves 42 include a first pressure regulating valve 421 and a second pressure regulating valve 422 arranged in sequence along the flow direction of the fluid, and a plurality of pressure introduction pipelines 43 include a first pressure introduction pipeline 431 and the second pressure introduction pipeline 432; the first pressure introduction pipeline 431 communicates with the first pressure regulating valve 421, and the second pressure introduction pipeline 432 communicates with the second pressure regulating valve 422; wherein, the first pressure introduction pipeline The outlet end of 431 is located on the fluid inlet side of the second pressure regulating valve 422, and the outlet end of the second pressure regulating pipeline 412 is located between the fluid outlet side of the first pressure guiding pipeline 431 and the fluid inlet side of the second pressure regulating valve 422 Meanwhile, the outlet end of the first pressure regulation pipeline 411 is located at the fluid outlet side of the second pressure introduction pipeline 432 . In this way, a plurality of pressure regulating pipelines 41 are used to divide the fluid, and then a plurality of pressure regulating valves 42 are used to regulate the pressure of the divided fluid, so as to protect each pressure regulating valve 42 .

The present application also provides a pressure regulating system control method, as shown in Figure 10 to Figure 12, which is applicable to the pressure regulating system of the above embodiment, the pressure regulating system control method includes: adjusting the first cut-off valve 3 to the first predetermined opening Degree value; open the automatic valve 2; continue to open the first cut-off valve 3 to the maximum opening. In this way, the first cut-off valve 3 is opened to a predetermined opening degree. When a part of the fluid passes through the first cut-off valve 3, the automatic valve 2 is opened. The automatic valve 2 adjusts its own opening degree according to the inflow pressure of the fluid. When the system is stable, The first cut-off valve 3 is fully opened. Wherein, a valve position sensor 30 is arranged on the first shut-off valve 3 to detect the opening degree of the first shut-off valve 3 .

In the first embodiment of the control method of the pressure regulation system provided by the present application, the method for obtaining the predetermined opening value includes: detecting the instantaneous pressure value of the fluid at the fluid inlet 100 after receiving the pressure regulation instruction, and detecting the first The current opening value of the cut-off valve 3; compare the instantaneous pressure value with the preset pressure threshold in the system, and when the instantaneous pressure value is within the range of the pressure threshold, use the interpolation method to determine the first cut-off valve 3 corresponding to the instantaneous pressure value The allowable opening value that allows fluid to pass through; compare the current opening value with the allowable opening value, when the difference between the current opening value and the allowable opening value is less than or equal to the preset difference ratio, the current opening value is the first a predetermined opening value. In the pressure regulating system, different pressure values at the fluid inlet 100 correspond to different openings of the first shut-off valve 3 respectively, and the relationship between the two is linear. After receiving the pressure regulating command, according to the instantaneous pressure of the fluid at the fluid inlet 100 The value is compared with the pressure value stored in the system, and when the actual instantaneous pressure value is within the threshold value stored in the system, the allowable opening value of the first shut-off valve 3 that allows fluid to pass is obtained by interpolation. Specifically, the preset difference ratio a is greater than or equal to 0.0001.

The control method of the pressure regulating system further includes: after the first cut-off valve 3 operates at the first predetermined opening value for a predetermined period of time; opening the first cut-off valve 3 to a maximum opening. Such setting is to ensure the stable operation of the first cut-off valve 3 within a predetermined time period s, and then fully open the first cut-off valve 3 . Preferably, s is greater than or equal to 0.01.

In the second embodiment of the control method of the pressure regulation system provided by the present application, the pressure regulation system is the pressure regulation system of the second embodiment above, and the control method of the pressure regulation system further includes: detecting the instantaneous pressure value of the fluid inlet 100, opening the first A cut-off valve 3 to the second predetermined opening value; open the second cut-off valve 60 and the third cut-off valve 70; open the automatic valve 2; open the first cut-off valve 3 to the maximum opening. Since the second shut-off valve 60 and the third shut-off valve 70 are provided to share the pressure in the first shut-off valve 3, in this embodiment, the first shut-off valve 3 can be directly opened to a predetermined opening degree a, and then the automatic shut-off valve 3 can be opened. After the valve, slowly open the first shut-off valve 3 to fully open.

In the third embodiment provided by the present application, since the PID adjustment module is installed in the automatic valve, the automatic valve is opened after the first shut-off valve 3 is fully opened, and the opening degree of the automatic valve is determined to a through PID adjustment. , and further slowly open the automatic valve to the maximum opening.

From the above description, it can be seen that the above-mentioned embodiments of the present application have achieved the following technical effects:

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

A pressure regulating system, comprising a fluid inlet (100) and a fluid outlet (200), characterized in that the pressure regulating system also includes:

A pressure regulating circuit (1), the two ends of the pressure regulating circuit (1) communicate with the fluid inlet (100) and the fluid outlet (200) respectively;

An automatic valve (2), arranged at the inlet end of the pressure regulating circuit (1) and communicated with the pressure regulating circuit (1);

The first cut-off valve (3) is arranged on the pressure regulation circuit (1) and communicated with the pressure regulation circuit (1), and the inlet end of the first cut-off valve (3) is connected to the fluid inlet (100 ) connected;

A pressure regulating assembly (4), arranged on the pressure regulating circuit (1) and communicated with the pressure regulating circuit (1), the pressure regulating assembly (4) is located far away from the automatic valve (2) One end of a shut-off valve (3).
The pressure regulation system according to claim 1, wherein the pressure regulation system further comprises:

The safety circuit (5) is arranged at the outlet end of the pressure regulating circuit (1), and the safety circuit (5) communicates with the pressure regulating circuit (1);

A protection valve is arranged on the safety circuit (5), and the protection valve communicates with the safety circuit (5).
The pressure regulating system according to claim 2, characterized in that, the protection valve includes a safety valve (510) and a first vent valve (520), and the safety circuit (5) includes a first branch ( 51) and the second branch (52), the first branch (51) is provided with a safety valve (510), and the second branch (52) is provided with a first vent valve (520); Said safety loop (5) also includes:

The first converging main road (53), the inlet end of the first converging main road (53) communicates with the pressure regulating circuit (1), and the outlet end of the first converging main road (53) is respectively connected to the The first branch (51) communicates with the second branch (52).
The pressure regulating system according to claim 3, characterized in that, the safety circuit (5) further comprises:

The second converging main road (54), the inlet end of the second converging main road (54) communicates with the first branch (51) and the second branch (52) respectively, and the second converging The outlet end of the main road (54) communicates with the fluid inlet (100);

The third branch (55), the two ends of the third branch (55) communicate with the second converging main road (54) and the pressure regulating circuit (1) respectively, the third branch ( 55) is provided with a second vent valve (550).
The pressure regulating system according to any one of claims 1 to 4, wherein the pressure regulating system further comprises:

The first inflow branch (6) is arranged in parallel with the pressure regulation circuit (1), and the two ends of the first inflow branch (6) communicate with the pressure regulation circuit (1) respectively, and the first The inlet port of the inflow branch (6) is located on the fluid inlet side of the first shut-off valve (3), and the outlet port of the first inflow branch (6) is located between the first shut-off valve (3) and the fluid inlet side of the first shut-off valve (3). between the automatic valves (2);

The second cut-off valve (60) is arranged on the first inflow branch (6) and communicated with the first inflow branch (6).
The pressure regulation system according to claim 5, wherein the pressure regulation system further comprises:

The second inflow branch (7) is arranged in parallel with the pressure regulating circuit (1), and the two ends of the second inflow branch (7) are respectively communicated with the pressure regulating circuit (1), and the second The inlet end of the inflow branch (7) is located between the first shut-off valve (3) and the automatic valve (2), and the outlet end of the second inflow branch (7) is located between the automatic valve (2) ) on the fluid outlet side;

The third cut-off valve (70) is arranged on the second inflow branch (7) and communicated with the second inflow branch (7).
The pressure regulation system according to any one of claims 1 to 4, characterized in that a PID regulation module is arranged in the automatic valve (2).
The pressure regulating system according to any one of claims 1 to 4, characterized in that, the pressure regulating assembly (4) comprises:

A fourth shut-off valve (40), arranged on the pressure regulating circuit (1) and communicated with the pressure regulating circuit (1);

A pressure regulating pipeline (41), the pressure regulating pipeline (41) is arranged in parallel with the pressure regulating circuit (1), and the two ends of the pressure regulating pipeline (41) are respectively connected to the fourth shut-off valve ( 40) communicate with the pressure regulation circuit (1).
The pressure regulating system according to claim 8, characterized in that, the pressure regulating assembly (4) further comprises:

A pressure regulating valve (42), which is arranged on the pressure regulating circuit (1), and the pressure regulating valve (42) is located at the outlet end of the fourth shut-off valve (40);

A pressure introduction pipeline (43), the pressure introduction pipeline (43) is arranged in parallel with the pressure regulating circuit (1), and the two ends of the pressure introduction pipeline (43) are respectively connected to the pressure regulating valve (42 ) is communicated with the pressure regulating circuit (1);

The outlet end of the pressure regulation pipeline (41) is located on the fluid outlet side of the pressure introduction pipeline (43).
The pressure regulating system according to claim 9, characterized in that there are multiple pressure regulating valves (42), and multiple pressure regulating valves (42) are sequentially arranged on the regulating valves along the flow direction of the fluid. On the pressure circuit (1);

There are multiple pressure introduction pipelines (43), and the multiple pressure introduction pipelines (43) are set in one-to-one correspondence with the multiple pressure regulating valves (42).
The pressure regulating system according to claim 10, characterized in that, the plurality of pressure regulating valves (42) include a first pressure regulating valve (421) and a second pressure regulating valve (422) arranged in sequence along the flow direction of the fluid ), a plurality of said pressure-leading pipelines (43) include a first pressure-leading pipeline (431) and a second pressure-leading pipeline (432);

The first pressure introduction pipeline (431) communicates with the first pressure regulating valve (421), and the second pressure introduction pipeline (432) communicates with the second pressure regulating valve (422);

Wherein, the outlet end of the first pressure introduction pipeline (431) is located at the fluid outlet side of the second pressure introduction pipeline (432), and the outlet end of the pressure regulation pipeline (41) is located at the fluid outlet side of the first pressure introduction pipeline (432). The fluid outlet side of the pressure induction line (431).
The pressure regulating system according to claim 10, characterized in that, the plurality of pressure regulating valves (42) include a first pressure regulating valve (421) and a second pressure regulating valve arranged in sequence along the flow direction of the fluid (422), the plurality of pressure introduction pipelines (43) include a first pressure introduction pipeline (431) and a second pressure introduction pipeline (432);

The first pressure introduction pipeline (431) communicates with the first pressure regulating valve (421), and the second pressure introduction pipeline (432) communicates with the second pressure regulating valve (422);

Wherein, the outlet end of the first pressure introduction pipeline (431) is located at the fluid inlet side of the second pressure regulating valve (422), and the outlet end of the pressure introduction pipeline (41) is located at the fluid inlet side of the second pressure regulator valve (422). Fluid outlet side of pressure line (432).
The pressure regulating system according to claim 10, characterized in that, the plurality of pressure regulating valves (42) include a first pressure regulating valve (421) and a second pressure regulating valve (422) arranged in sequence along the flow direction of the fluid ), a plurality of said pressure-leading pipelines (43) include a first pressure-leading pipeline (431) and a second pressure-leading pipeline (432);

The first pressure introduction pipeline (431) communicates with the first pressure regulating valve (421), and the second pressure introduction pipeline (432) communicates with the second pressure regulating valve (422);

Wherein, the outlet end of the first pressure guiding pipeline (431) is located at the fluid inlet side of the second pressure regulating valve (422), and the outlet end of the pressure regulating pipeline (41) is located at the fluid inlet side of the first pressure regulating valve (422). Between the outlet end of the pressure pipeline (431) and the inlet end of the second pressure regulating valve (422).
The pressure regulating system according to claim 10, characterized in that there are multiple fourth shut-off valves (40), and multiple fourth shut-off valves (40) are sequentially arranged along the flow direction of the fluid, and the regulator There are multiple pressure pipelines (41), and the multiple pressure regulating pipelines (41) are set in one-to-one correspondence with the multiple fourth shut-off valves (40).
The pressure regulating system according to claim 14, characterized in that, the plurality of fourth shut-off valves (40) include a first unit shut-off valve (401) and a second unit shut-off valve ( 402), the multiple pressure regulating pipelines (41) include a first pressure regulating pipeline (411) and a second pressure regulating pipeline (412), the first pressure regulating pipeline (411) and the second pressure regulating pipeline A unit shut-off valve (401) is communicated, and the second pressure regulating pipeline (412) is communicated with the second unit shut-off valve (402);

The multiple pressure regulating valves (42) include a first pressure regulating valve (421) and a second pressure regulating valve (422) arranged in sequence along the flow direction of the fluid, and the multiple pressure introduction pipelines (43) include the first A pressure introduction pipeline (431) and a second pressure introduction pipeline (432);

The first pressure introduction pipeline (431) communicates with the first pressure regulating valve (421), and the second pressure introduction pipeline (432) communicates with the second pressure regulating valve (422);

Wherein, the outlet end of the first pressure introduction pipeline (431) is located at the fluid inlet side of the second pressure regulating valve (422), and the outlet end of the second pressure regulating pipeline (412) is located at the fluid inlet side of the second pressure regulating valve (422). Between the fluid outlet side of a pressure guiding pipeline (431) and the fluid inlet side of the second pressure regulating valve (422), the outlet end of the first pressure regulating pipeline (411) is located Fluid outlet side of pressure line (432).
A control method for a pressure regulating system, applicable to the pressure regulating system according to any one of claims 1 to 15, characterized in that the control method for the pressure regulating system comprises:

Regulating the first cut-off valve (3) to a first predetermined opening value;

Open the automatic valve (2);

Continue to open the first shut-off valve (3) to the maximum opening.
The control method of the pressure regulating system according to claim 16, wherein the method for obtaining the predetermined opening value comprises:

After receiving the pressure regulation command, detecting the instantaneous pressure value of the fluid at the fluid inlet (100), and detecting the current opening value of the first shut-off valve (3);

Comparing the instantaneous pressure value with the preset pressure threshold value in the system, when the instantaneous pressure value is within the range of the pressure threshold value, using an interpolation method to determine that the first cut-off valve (3) corresponding to the instantaneous pressure value allows Allowable opening value for fluid passage;

The current opening value is compared with the allowable opening value, and when the difference between the current opening value and the allowable opening value is less than or equal to a preset difference ratio, the current opening value is the first predetermined opening value.
The control method of the pressure regulation system according to claim 16, wherein the control method of the pressure regulation system further comprises:

After the first cut-off valve (3) operates for a predetermined time with the first predetermined opening value;

Open the first shut-off valve (3) to the maximum opening.
The control method of the pressure regulation system according to claim 16, wherein the pressure regulation system is the pressure regulation system according to claim 6, and the control method of the pressure regulation system further comprises:

detecting the instantaneous pressure value of the fluid inlet (100), and opening the first shut-off valve (3) to a second predetermined opening value;

Open the second shut-off valve (60) and the third shut-off valve (70);

Open the automatic valve (2);

Open the first shut-off valve (3) to the maximum opening.