CN111550476A - Straightening device for outflow of process valve - Google Patents

Abstract

The invention discloses a rectifying device for the outflow of a process valve, which is arranged at the outlet of the process valve and sequentially comprises the following components from upstream to downstream: an inlet member, a central member and an outlet member. When fluid is conveyed in a pipeline, the opening control of the flow valve can cause non-uniform eccentric turbulent flow near the outlet of the flow valve, and the stability of the flow at the outlet is seriously influenced along with the generation of vortex. The device can improve the turbulent flow effectively through gathering, scattering, vortex elimination and integration treatment with the outlet turbulent flow that flow valve aperture regulation and control arouses to reach effectual rectification effect, thereby improved the stability that flow valve outlet flows. In addition, the invention can be used in cooperation with a pipeline fluid measuring device, is beneficial to the stable flow signal acquisition of the pipeline fluid measuring device and improves the measurement precision.

Description

Straightening device for outflow of process valve

technical field

The present invention relates to a rectifying device, in particular to a rectifying device used for the outflow of a process valve.

Background technique

Process valve is an important equipment for fluid regulation in pipeline fluid transportation, which is widely used in machinery, chemical industry, energy and other fields. However, the opening of the process valve will cause non-uniform eccentric turbulent flow near its outlet, accompanied by the generation of vortices, which will seriously affect the stability of the outlet flow, thereby restricting the signal acquisition and accuracy of the pipeline fluid metering device behind the valve.

In reality, the traditional method is to extend the pipeline at the outlet end of the process valve to obtain a relatively stable flow, but this puts forward higher requirements for the spatial arrangement of the process pipeline. However, the function of the rectifier is to transform the unstable flow into a stable flow, greatly shortening or eliminating the extension of the pipeline.

At present, the existing rectifiers are mostly designed with a single rectifier structure, mainly including orifice plate type, tube bundle type and blade type, while the combined rectifier structure is less; secondly, the existing rectifier structure design is not ideal for rectification effect, flow The resistance is large and the versatility is poor. Therefore, according to the non-uniform eccentric turbulent flow characteristics of the outflow of the process valve, it is of practical significance to carry out the rectification design of the outflow of the process valve for the purpose of the rectification effect and flow resistance of the rectification structure.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a rectifying device for the outflow of a process valve. According to the characteristics of non-uniform eccentric turbulent outflow caused by the regulation of the opening degree of the process valve, a comprehensive rectification method of convergence, uniform dispersion, eddy elimination and integration is adopted to effectively improve the turbulent flow and achieve an effective rectification effect, thereby improving the process valve outlet. flow stability.

In order to achieve the above object, technical scheme of the present invention is as follows:

The rectifying device for outflow of a process valve of the present invention includes a process valve, a rectifying device is installed at the outlet of the process valve, and the rectifying device sequentially includes an inlet member, a central member and an outlet member from upstream to downstream.

The inlet member has a tapered conical cavity at one end close to the process valve, and a tapered conical cavity at the other end.

The central member has a conical boss at one end near the entrance member, and the bottom surface of the conical boss is radially equidistant with 4-6 layers of arc waist-shaped holes, and 5-8 holes are evenly staggered on the circumference of each layer. Arc waist-shaped hole and circular hole, and the other end is a buffer cavity.

There is a circular through hole in the center of the outlet member, and evenly distributed fan-shaped holes are opened on the periphery of the circular through hole in the circumferential direction.

The tapered cone angle α of the tapered conical cavity body is 15°˜30°.

The gradually expanding cone angle β of the gradually expanding conical cavity body is 15°˜30°.

The evenly distributed fan-shaped holes are 20-30.

The extension line of the generatrix of the tapered conical cavity intersects the apex of the conical boss.

The beneficial effects that the present invention has are:

When the fluid is transported in the pipeline, the adjustment of the opening degree of the process valve will cause non-uniform eccentric turbulent flow near the outlet, accompanied by the generation of vortices, which seriously affects the stability of the outlet flow. The device can collect, disperse, eliminate eddy and integrate the turbulent flow at the outlet caused by the regulation of the opening of the process valve, effectively improve the turbulent flow, achieve an effective rectification effect, and improve the stability of the flow at the outlet of the process valve. In addition, the device can be used in conjunction with the pipeline fluid measuring device, which is beneficial to the stable flow signal acquisition of the pipeline fluid measuring device and improves the measurement accuracy.

Description of drawings

Fig. 1 is a schematic diagram showing the assembly of the present invention and a process valve.

Figure 2 is a perspective view of the structure of the present invention.

FIG. 3 is a front view of the inlet member of FIG. 2 .

FIG. 4 is a sectional view taken along line 1-1 of FIG. 3 .

FIG. 5 is a front view of the center member of FIG. 2 .

FIG. 6 is a sectional view taken along line 2-2 of FIG. 5 .

FIG. 7 is a front view of the outlet member of FIG. 2 .

FIG. 8 is a cross-sectional view taken along line 3-3 of FIG. 7 .

Figure 9 is a cross-sectional view of the overall assembly of the present invention.

In the figure: 1. Process valve, 2. Rectifier, 2A, inlet member, 3A, tapered conical cavity, 4A, tapered cavity, 2B, central member, 3B, conical boss, 4B, arc waist-shaped hole, 5B, circular hole, 6B, buffer cavity, 2C, outlet member, 3C circular through hole, 4C, fan-shaped hole.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

As shown in Figures 1 and 2, a rectifying device for the outflow of a process valve, including a process valve 1, is characterized in that a rectifying device 2 is installed at the outlet of the process valve 1, and the rectifying device 2 extends from the upstream to the The downstream includes in turn: an inlet member 2A, a central member 2B and an outlet member 2C.

As shown in FIGS. 3 and 4 , the inlet member 2A has a tapered conical cavity 3A at one end close to the process valve 1 , and a tapered conical cavity 4A at the other end.

As shown in FIGS. 5 and 6 , the central member 2B has a conical boss 3B at the center near one end of the inlet member 2A, and the bottom surface of the conical boss 3B is radially equidistant with 4-6 layers of arc waist shape For hole 4B, 5-8 circular arc waist-shaped holes 4B and circular holes 5B are evenly staggered on the circumference of each layer, and the other end is a buffer cavity 6B.

As shown in FIG. 7 and FIG. 8 , a circular through hole 3C is formed in the center of the outlet member 2C, and fan-shaped holes 4C are evenly distributed in the circumferential direction of the outer circumference of the circular through hole 3C.

As shown in FIG. 4 , the tapered cone angle α of the tapered conical cavity body 3A is 15°˜30°.

As shown in FIG. 4 , the gradually expanding cone angle β of the gradually expanding conical cavity body 4A is 15°˜30°.

As shown in FIG. 7 , there are 20 to 30 fan-shaped holes 4C evenly distributed.

As shown in FIG. 9 , the extension line of the generatrix of the tapered conical cavity body 3A intersects the apex of the conical boss 3B.

The working principle of the present invention is as follows:

As shown in Fig. 1 and Fig. 9, in pipeline fluid transportation, the adjustment of the opening degree of the process valve 1 will cause non-uniform eccentric turbulent flow near its outlet. The non-uniform eccentric turbulent flow (indicated by arrows in FIG. 9 ) first passes through the tapered conical cavity 3A at the front end of the inlet member 2A of the rectifying device 2 of the present invention to converge toward the center of the pipe. Next, the converging flow collides with the top of the conical boss 3B at the front end of the upper center member 2B, and spreads radially along the flow channel between the tapered conical cavity 4A and the conical boss 3B. The extension line of the busbar of the cavity body 3A intersects the apex of the conical boss 3B, and the radial uniform dispersion effect is better after the convergent flow collides with the conical boss 3B. Then, the evenly dispersed fluid passes through the circular arc waist-shaped hole 4B and the circular hole 5B on the periphery of the conical boss 3B for vortex elimination treatment. Because the arc waist-shaped holes 4B and the circular holes 5B are radially distributed in multiple layers, and each layer is evenly staggered, a better eddy elimination effect is achieved, a larger flow area is ensured, and the flow resistance is reduced. The eddy-eliminated flow enters the buffer chamber 6B for integration. Finally, through the central circular through hole 3C and the peripheral fan-shaped hole 4C of the outlet member 2C, the eddy elimination and integration treatment are further realized, the turbulent flow is effectively improved, and the final rectification effect is achieved, thereby improving the outlet of the process valve 1. Flow stability. In addition, the present invention can be used with the pipeline fluid measuring device, which is beneficial to the stable flow signal acquisition of the pipeline fluid measuring device and improves the measuring accuracy.

Claims (6)

1. A rectifying device for outflow of a process valve, including a process valve (1), characterized in that a rectifying device (2) is installed at the outlet of the process valve (1), and the rectifying device (2) runs from upstream to downstream It includes in turn: an inlet member (2A), a central member (2B) and an outlet member (2C). 2. the rectifying device that is used for the outflow of process valve according to claim 1, is characterized in that: The inlet member (2A) has a tapered conical cavity body (3A) at one end close to the process valve (1), and a tapered conical cavity body (4A) at the other end; The central member (2B) has a conical boss (3B) at the center near one end of the inlet member (2A), and the bottom surface of the conical boss (3B) is radially equidistantly provided with 4-6 layers of arc waist-shaped holes (4B), 5~8 arc waist-shaped holes (4B) and circular holes (5B) are evenly staggered on the circumference of each layer, and the other end is a buffer cavity (6B); There is a circular through hole (3C) in the center of the outlet member (2C), and evenly distributed fan-shaped holes (4C) are opened on the periphery of the circular through hole (3C). 3 . The rectifying device for outflow of a process valve according to claim 1 , wherein the tapered cone angle α of the tapered conical cavity body ( 3A ) is 15° to 30°. 4 . 4 . The rectifying device for outflow of a process valve according to claim 1 , wherein the gradually expanding cone angle β of the expanding conical cavity body ( 4A ) is 15° to 30°. 5 . 5 . The rectifying device for outflow of a process valve according to claim 1 , wherein the number of the evenly distributed fan-shaped holes ( 4C ) is 20-30. 6 . 6. The rectifying device for outflow of a process valve according to claim 1, characterized in that: the extension line of the busbar of the tapered conical cavity body (3A) intersects with the apex of the conical boss (3B). .

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