CN201053399Y - Fluid pipe leakage-proof system for pump - Google Patents

Abstract

The utility model relates to a pump leakage protective system on a fluid pipeline and is characterized in that: an inlet pipeline of a pump is provided with a pressure limiting valve which can limit liquid pressure in the pipeline, meanwhile an outlet end or an outlet pipeline of the pump is provided with a resistance valve, pressure of the fluid is used to control separation of the fluid, leakage caused by flowing of the fluid when the pump on the fluid pipeline stops is prevented. The pressure provided to the fluid by the pump P < pump> is greater than the rated pressure of the resistance valve P <resistance> is greater than the limited pressure of the pressure limiting valve P < limited>. On and off of the pipeline of the utility model is through self-operated control of the pressure of the fluid completely. When the pump stops, operators need not achieve through heavy manual mode, and special electric controlled valve is unnecessary to be adopted, thereby the utility model not only is simple and easy to operate, and reduces cost of the whole system, but also has higher reliability than the electric control mode and high service value.

Description

A kind of fluid pipeline pump leakage protective system

[technical field]

The utility model relates to the leakage protective system of pump on a kind of fluid circuit, is specially the leakage protection device of pump when stopping in a kind of pipeline work.

[background technique]

At present, be loaded on the pump on the fluid circuit in the prior art, its pump housing becomes pass-through state mostly when shutting down, for the continuation that prevents liquid is flowed, need with before the pump or the valve behind the pump close by hand or it closed by electric controller.In the practical operation, craft is closed comparatively loaded down with trivial details, needs the operator careful and responsible, and the electric control valve cost is high, and complex structure and damage easily are when the burst power outage takes place, will bring by can't throttle down and cause leakage accident, so prior art remains to be improved.

[model utility content]

The utility model is at the above-mentioned defective of prior art; the leakage protective system of pump on a kind of fluid circuit is provided; all in substituting prior art the pump housing on the fluid circuit when shutting down; be manually-operated gate or the electric control valve that prevents that flow of fluid from establishing; and its reliability is much better than manually-operated gate and electric control valve, and cost is significantly less than electric control valve.

For achieving the above object, the technological scheme that the utility model proposed is:

A kind of fluid pipeline pump leakage protective system, comprise pump and the pipeline that is attached thereto, it is characterized in that: but the pressure-limit valve of a restriction conduit fluid pressure is set on the inlet pipeline of described pump, and being provided with one simultaneously on the outlet end of described pump or outlet conduit can cut off the mobile resistance valve of fluid by hydrodynamic pressure control.

The pressure P that described pump provides to fluid _PumpThe rated pressure P of＞resistance valve _ResistanceThe qualification pressure P of＞pressure-limit valve _Limit

Described pressure-limit valve is the pressure-limit valve of band water cut-off protection function;

Described resistance valve is the resistance valve of band sealing head, or is the resistance valve of band sealing gasket, or is the resistance valve of band venting valve;

Described pressure-limit valve comprises upper shell and lower shell body, isolate by the set pressure limiting diaphragm of its junction plane between the upper and lower casing, offer water intake and water outlet on the described lower shell body, be provided with sealed mouth in the cavity of water intake and water outlet connection, place the sealed mouth position with being loaded on that upper shell interior diaphragm plate links to each other and can doing the sealing head that moves up and down by set spring control on this diaphragm plate;

The resistance valve of described band sealing head comprises a housing, and this housing is provided with water intake and water outlet, is provided with sealed mouth in the cavity of described water intake and water outlet connection, and the sealing mouth is provided with the sealing head that can be controlled itself and sealed mouth applying by spring;

The resistance valve of described band sealing gasket comprises a housing, and this housing is provided with water intake and water outlet, is provided with sealed mouth in the cavity of described water intake and water outlet connection, and the gasket seal periphery is fixed on the housing, and the intermediate portion controls it by spring and sealed mouth is fitted;

The resistance valve of described band venting valve comprises two mutually before the serial connection, rear case, the two housings inner chamber is interconnected, wherein the water intake of rear case is located at front case water outlet position, be provided with sealed mouth in the cavity of described two housings water intake and water outlet connection, wherein sealed mouth is provided with the sealing head that can be controlled itself and sealed mouth applying by spring in the front case, be provided with gasket seal in the rear case, sealing pad periphery is fixed on the rear case, and the intermediate portion controls it by spring and sealed mouth is fitted; Perhaps: be provided with gasket seal in the described front case, sealing pad periphery is fixed on the front case, and the intermediate portion is controlled itself and sealed mouth by spring and fitted, and sealed mouth is provided with the sealing head that can be controlled itself and sealed mouth applying by spring in the rear case; Perhaps be: be equipped with the sealing head that to control itself and sealed mouth applying by spring in the forward and backward two housings on the sealed mouth.

The utility model is by being provided with pressure-limit valve on the inlet pipeline of pump, can limit pipe fluid pressure, make it in a force value current downflow of setting, simultaneously on the outlet end of pump or outlet conduit, a resistance valve is set, therefore, the keying of an electrical signal control pump, the break-make of pipeline is then controlled voluntarily by the pressure of fluid.When pump is shut down, can not need the operator to finish by heavy manual mode, also needn't adopt special electric control valve, not only simple, also reduced the whole system cost, and reliability has great use value far above automatically controlled mode.

[description of drawings]

Fig. 1 is the structural representation of the pressure-limit valve of the utility model band water cut-off protection function;

Fig. 2 is the structural representation of the resistance valve of the utility model band sealing head;

Fig. 3 is the structural representation of the resistance valve of the utility model band gasket seal;

Fig. 4 is the structural representation of the resistance valve of the utility model band venting valve;

Fig. 5 is the system diagram of the utility model Application Example one;

Fig. 6 is the system diagram of the utility model Application Example two.

Among the figure:

1. water pipe 2. pressure-limit valves 3. water pipes

4. water pretreatment device 5. water pipes 6. water pumps

7. reverse osmosis module 8. water pipes 9. buckets

10. waste water pipe 11. resistance valves 12. pressure switches

13. water pipe 14. purified water tap 16. water pipes

2-1. water intake 2-2. lower shell body 2-3. water outlet

2-4. bolt 2-5. spring 2-6. diaphragm plate

2-7. pressure limiting diaphragm 2-8. sealed mouth 2-9. sealing head

2-10. controlling rod 2-11. upper shell

11-1. water intake 11-2. sealing 11-3. gasket seal

11-4. spring block 11-5. spring 11-6. nut

11-7. housing 11-8. water outlet 11-21. water intake

11-22. sealed mouth 11-23. sealing head 11-24. spring block

11-25. spring 11-26. nut 11-27. housing

11-28. sealed mouth before the water inlet 11-32. before the water outlet 11-31.

11-33. sealing head 11-34. spring block 11-35. spring

11-36. water outlet before the nut 11-37. front case 11-38.

11-41. sealed mouth 11-43. gasket seal behind the backflow water intake 11-42.

11-44. spring block 11-45. spring 11-46. nut

11-47. rear case 11-48. recycling effluent mouth

[embodiment]

The utility model is primarily aimed at the existing in prior technology defective and the improvement carried out.

The utility model has designed a kind of leakage protective system that is used for the pump on the fluid line, can be applicable to various occasions.Described system comprises pump and the pipeline that is attached thereto; but it mainly is the pressure-limit valve that a restriction conduit fluid pressure is set on the inlet pipeline of described pump; pressure by this pressure-limit valve restriction conduit inner fluid; simultaneously on the outlet end of described pump or outlet conduit, a resistance valve is set; be provided with the sealed mouth that can cut off fluid automatically in the resistance valve by pressure control; be connected with pipeline between pump and each valve; formed a leakage protective system; can prevent to be loaded on pump on the fluid line when shutting down, because the mobile leakage that causes of fluid.

In whole pipeline, the pressure P that described pump provides to fluid _PumpThe rated pressure P of＞resistance valve _ResistanceThe qualification pressure P of＞pressure-limit valve _LimitThat is: be installed in the qualification pressure P of the pressure-limit valve before the pump _LimitMust be less than the rated pressure P that is installed in the resistance valve on waterexit end behind the pump or the rising pipe _Resistance, and the rated pressure P of resistance valve _ResistanceThe pressure P that must provide to fluid less than pump _Pump, this is the most important technical parameter of native system.

When pump is shut down, after fluid passes through pressure-limit valve, P _PumpPressure begins to reduce very fast limit value P less than pressure-limit valve _Limit, more less than the rating value P that is loaded on the resistance valve behind the pump _ResistanceSo fluid can't press off resistance valve, the pipeline closure; When pump startup, P _PumpPressure begins to increase, as the pump pressure P that provides to fluid _PumpRating value P greater than resistance valve _ResistanceThe time, fluid will press off resistance valve, and pipeline is unimpeded, thereby has realized the purpose of this utility model.

Need to prove that can not surpass the rating value of resistance valve if can be sure of the pressure of the preceding system of pump, the waterexit end of pump and pump or the resistance valve on the outlet conduit can be formed the leakage protective system of pump.If the pressure of system may surpass the rating value of resistance valve before the pump, the pressure of fluid can press off resistance valve and flow, at this moment, a pressure-limit valve must be installed before pump, the leakage protective system of forming pump by the waterexit end or the resistance valve on the outlet conduit of the pressure-limit valve before the pump, pump and pump.

Further as the utility model; described pressure-limit valve can be preferably the pressure-limit valve of band water cut-off protection function; it is the improvement product (being produced by the good rain water purification plant in Shenzhen Manufacturing Co., Ltd) of pressure-limit valve; it can be when the pressure limiting function breaks down; cut off the water route, system and provide maintenance signal behind the Protective valve.Therefore.The utility model selects for use the pressure-limit valve of band water cut-off protection function more safe.

Fig. 1 has showed the structural representation of the pressure-limit valve 2 of band water cut-off protection function.As shown in the figure, it comprises upper shell 2-11 and lower shell body 2-2, upper shell 2-11 is connected by bolt 2-4 with lower shell body 2-2, its junction plane is equipped with pressure limiting diaphragm 2-7, on, can be isolated into two cavitys by pressure limiting diaphragm 2-7 between the lower shell body, offer water intake 2-1 and water outlet 2-3 on the described lower shell body 2-2, in water intake 2-1 and cavity that water outlet 2-3 is communicated with, sealed mouth 2-8 is arranged, the influent side of sealed mouth 2-8 has sealing head 2-9, be positioned at below the sealed mouth 2-8,2-10 links to each other with controlling rod, a controlling rod 2-10 fixed connection and sealing 2-9 also passes the fixedly connected diaphragm plate 2-6 that is positioned at upper shell 2-11 of sealed mouth 2-8, the limited pressuring film plate 2-7 in diaphragm plate 2-6 below, and there is spring 2-5 the top, spring 2-5 may command sealing head 2-9 does and moves up and down, and makes it to place sealed mouth 2-8 position.Pressure-limit valve 2 can make the high-pressure liquid that enters it flow through after it, and pressure is not more than its qualification pressure P _LimitWhen hydrodynamic pressure surpasses P _LimitThe time, (area of decompression diaphragm multiply by P to the pressure of the suffered fluid of decompression diaphragm 2-7 _Limit), greater than the precompressed elastic force of spring 2-5, surrender spring 2-5 moves upward gang control lever 2-10 and sealing head 2-9, close encapsulation mouth 2-8.If after pressure-limit valve 2 pressure descended, controlling rod 2-10 did reversing motion, sealed mouth 2-8 opens, and by this to-and-fro motion, just can realize the pressure limiting to high-pressure liquid.

Fig. 2, Fig. 3, Fig. 4 have showed the structural representation of different resistance valve 11.Wherein said resistance valve 11 can be the resistance valve of band sealing head, or is the resistance valve of band sealing gasket, or for being with the resistance valve of venting valve.

As shown in Figure 2, the resistance valve 11 of described band sealing head comprises a housing 11-27, this housing 11-27 is provided with water intake 11-21 and water outlet 11-28, be provided with sealed mouth 11-22 in the cavity of described water intake 11-21 and water outlet 11-28 connection, sealing head 11-23, spring block 11-24, spring 11-25 are arranged on the sealing mouth 11-22 successively, can water intake 11-21 and water outlet 11-28 be cut off by the applying of spring 11-25 control sealing head 11-23 and sealed mouth 11-22.For ease of installation and the replacing of sealing head 11-23, spring block 11-24, spring 11-25, an opening is arranged on housing 11-27, seal by nut 11-26.

As the pressure of the fluid of water intake 11-21 rating value P greater than resistance valve _ResistanceThe time, fluid acts on power (hydrodynamic pressure multiply by the sealed mouth area) on the sealing head 11-23 greater than the precompressed elastic force of spring 11-25, will surrender spring 11-25 and move backward, and sealing head 11-23 breaks away from sealed mouth 11-22, valve open, fluid could pass through resistance valve 11.Otherwise sealing head 11-23 will fit on the sealed mouth 11-22, valve closes, and fluid can not pass through resistance valve 11, thereby realize cutting off the purpose of current.

Yet the hydrodynamic pressure of water intake 11-21 is greater than the rating value P of resistance valve 11 _Resistance Resistance valve 11 is opened, if but water outlet 11-28 is when having big resistance, the hydrodynamic pressure of water intake 11-21 and water outlet 11-28 is approaching, fluid will become very slow by the flow velocity of resistance valve 11, and under the elastic force effect of spring 11-25, sealing head 11-23 also can seal sealed mouth 11-22 again, when waiting for sealing head 11-23 inside and outside differential pressure again greater than the rating value of resistance valve 11, Open valve again.If like this, the circulation situation of fluid might produce wild effect.

Therefore, as of the present utility model further, can with the architecture advances of resistance valve 11 resistance valve of band gasket seal.

As shown in Figure 3, the resistance valve 11 of described band sealing gasket comprises a housing 11-7, this housing 11-7 is provided with water intake 11-1 and water outlet 11-8, be provided with sealed mouth 11-2 in the cavity of described water intake 11-1 and water outlet 11-8 connection, gasket seal 11-3, spring block 11-4 and spring 11-5 are arranged on the sealed mouth 11-2 successively, sealing gasket 11-3 periphery is fixed on the housing 11-7, and the intermediate portion cuts off water intake 11-1 and water outlet 11-8 by the applying that spring 11-5 controls itself and sealed mouth 11-2.For ease of installation and the replacing of gasket seal 11-3, spring block 11-4, spring 11-5, an opening is arranged on housing 11-7, seal by nut 11-6.

As the pressure of the fluid of water intake 11-1 rating value P greater than the resistance valve 11 of band gasket seal _ResistanceThe time, fluid acts on power (hydrodynamic pressure multiply by the sealed mouth area) on the gasket seal 11-3 greater than the precompressed elastic force of spring 11-5, will surrender spring 11-5 and move backward, and gasket seal 11-3 breaks away from sealed mouth 11-2, valve open, fluid could pass through resistance valve 11; Otherwise gasket seal 11-3 fits on the sealed mouth 11-2, valve closes, and fluid can not pass through resistance valve 11.Because gasket seal 11-3 and housing 11-7 form a separate cavities, when resistance valve 11 is opened, the hydrodynamic pressure continuous action is on gasket seal 11-3, resistance valve 11 will continue to open, until the elastic force that hydrodynamic pressure is lower than spring 11-5 is during divided by the cross-section area of gasket seal 11-3, resistance valve 11 just can cut out.

If the resistance valve that the leakage protective system of the utility model is selected for use 11 band gasket seals are except " being installed in the qualification pressure P of the preceding pressure-limit valve of pump _LimitMust be less than the rated pressure P that is installed in the resistance valve on waterexit end behind the pump or the rising pipe _Resistance, the rated pressure P of resistance valve _ResistanceThe pressure P that must provide to fluid less than pump _Pump" outside, be installed in the qualification pressure P of the pressure-limit valve before the pump _LimitAlso must be less than the cross-section area of the elastic force that is installed in the resistance valve spring 11-5 on waterexit end behind the pump or the rising pipe divided by gasket seal 11-3.

Therefore, in actual use, also the structure of resistance valve 11 can be changed into waterexit end band reflow pipe, the structure of band pressure maintaining valve on the reflow pipe.As shown in Figure 4, the resistance valve 11 of described band venting valve comprises that two are connected in series housing 11-37 before mutually, rear case 11-47, the two housings inner chamber is interconnected, rear case 11-47 water intake called after backflow water intake 11-31 wherein, be located at front case 11-37 water outlet 11-38 position before, rear case 11-47 water outlet is referred to as recycling effluent mouth 11-48, sealed mouth 11-32 before being respectively equipped with in the cavity of each water intake of described two housings and water outlet connection, back sealed mouth 11-42, on the sealed mouth 11-32 sealing head 11-33 is arranged successively before wherein in the front case 11-37, spring block 11-344 and spring 11-35, can fit water intake 11-31 and preceding water outlet 11-38 before making by spring 11-35 control sealing head 11-33 and preceding sealed mouth 11-32, backflow water intake 11-41 cuts off.For ease of installation and the replacing of sealing head 11-33, spring block 11-34, spring 11-35, an opening is arranged on front case 11-37, seal by nut 11-36.On the back sealed mouth 11-42 in the rear case 11-47 gasket seal 11-43, spring block 11-44 and spring 11-45 are arranged successively, sealing gasket 11-43 periphery is fixed on the rear case 11-47, itself and the applying of sealed mouth 11-42 are afterwards controlled by spring 11-45 in the intermediate portion, and backflow water intake 11-41 and recycling effluent mouth 11-48 are cut off.For ease of installation and the replacing of gasket seal 11-43, spring block 11-44, spring 11-45, an opening is arranged on rear case 11-47, seal by nut 11-46.

In the said structure, also can be in described front case 11-37 and be provided with gasket seal 11-43, sealing pad 11-43 periphery is fixed on the front case 11-37, the intermediate portion is controlled itself and preceding sealed mouth 11-32 by spring 11-35 and is fitted, and back sealed mouth 11-42 is provided with and can controls itself and the sealing head 11-33 of back sealed mouth 11-42 applying by spring 11-45 in the rear case 11-47.

Perhaps: also can with in the rear case 11-47 structure be designed to identical with front case 11-37, in front case 11-37, the rear case 11-47 before sealed mouth 11-32, back sealed mouth 11-42 all adopt sealing head 11-33 sealing.

What connect venting valve on preceding water outlet 11-38 passes back into mouth of a river 11-41, and the recycling effluent mouth 11-48 of venting valve can be back on the pipeline of water inlet 11-31 the place ahead, when the hydraulic pressure of current water outlet 11-38 is too high, can press off sealing head 11-43, liquid return; When hydraulic pressure is low, sealing head 11-43 return, liquid can't reflux.The pressure of water outlet 11-38 can be basicly stable like this.

Fig. 5, Fig. 6 have showed two Application Examples of the utility model system.

Below introduce characteristics of the present utility model and advantage in detail by specific embodiment of the utility model and accompanying drawing.

Embodiment one:

As shown in Figure 5; in family expenses reverse osmosis water cleaning systems; in municipal tap water and household reverse osmosis water cleaning systems joint the valve 2 of restricting water supply of being with the water cut-off protection function is installed; the waterexit end of the described valve 2 of restricting water supply connects water pipe 3, water pretreatment device 4, water pipe 5, water pump 6, water pipe 16, resistance valve 11, reverse osmosis membrane assembly 7 successively; the water of about 10-30% can become purified water through reverse osmosis membrane in the reverse osmosis membrane assembly 7, enters water butt 9 through water pipe 8.Water butt 9 back are connected with water pipe 13 and purified water tap 14.During system works, the water of about 70%-9%0 flows out from the reverse osmosis membrane sidewall becomes waste water, flows into waste water pipe 10.For preventing that water spills from waste water pipe 10 when pump is shut down,, pressure switch 12 is installed also on water butt 9 on water pipe 16 so resistance valve 11 has been installed.After the user opens purified water tap 14, hydraulic pressure descends, pressure switch 12 provides signal enabling water pump 6, because pump pressure is greater than the rated pressure of resistance valve 11, thereby can press off resistance valve, water flows smoothly, and the purified water that sees through reverse osmosis membrane arrives purified water tap 14 through water storage box 9 water pipes 13, and waste water flows into waste water pipe 10 from the sidewall of reverse osmosis membrane.After the user closed purified water tap 14, after water butt 9 water were full, pressure raise, and pressure switch 12 provides signal, switches off the pump 6.At this moment, how the pressure no matter net the municipal tap water changes, because the existence of pressure-limit valve 2, the hydraulic pressure in the household reverse osmosis water cleaning systems is less than or equal to the voltage limiting value P of described pressure-limit valve 2 all the time _Limit, less than the rating value P of resistance valve 11 _Resistance, can't press off resistance valve 11, therefore, water can't spill from waste water pipe 10.Simultaneously, because resistance valve 11 is installed in before the reverse osmosis membrane in the native system, the resistance behind the valve is very high, thus native system can in select the resistance valve of band voltage stabilizing for use or be with the resistance valve of gasket seal.

Embodiment two:

As shown in Figure 5, present embodiment two is basic identical with embodiment one, and different is, resistance valve 11 is installed in the waterexit end of pump 6, becomes one with pump, and its working condition is identical with embodiment one with principle.

Should be noted that above-mentioned description at each specific embodiment is comparatively concrete and detailed, can not therefore be interpreted as the restriction to the utility model claim, the utility model scope of patent protection should be as the criterion with claims.

Claims (9)

1. fluid pipeline pump leakage protective system, comprise pump and the pipeline that is attached thereto, it is characterized in that: but the pressure-limit valve of a restriction conduit fluid pressure is set on the inlet pipeline of described pump, and being provided with one simultaneously on the outlet end of described pump or outlet conduit can cut off the mobile resistance valve of fluid by hydrodynamic pressure control.

2. a kind of fluid pipeline pump leakage protective system according to claim 1 is characterized in that: the pressure P that described pump provides to fluid _PumpThe rated pressure P of＞resistance valve _ResistanceThe qualification pressure P of＞pressure-limit valve _Limit

3. a kind of fluid pipeline pump leakage protective system according to claim 1 is characterized in that: described pressure-limit valve is the pressure-limit valve of band water cut-off protection function.

4. according to claim 1 or 2 or 3 described a kind of fluid pipeline pump leakage protective systems, it is characterized in that: described resistance valve is the resistance valve of band sealing head, or is the resistance valve of band sealing gasket, or is the resistance valve of band venting valve.

5. a kind of fluid pipeline pump leakage protective system according to claim 4, it is characterized in that: the resistance valve of described band sealing head comprises a housing, this housing is provided with water intake and water outlet, be provided with sealed mouth in the cavity of described water intake and water outlet connection, the sealing mouth is provided with the sealing head that can be controlled itself and sealed mouth applying by spring.

6. a kind of fluid pipeline pump leakage protective system according to claim 4, it is characterized in that: the resistance valve of described band sealing gasket comprises a housing, this housing is provided with water intake and water outlet, be provided with sealed mouth in the cavity of described water intake and water outlet connection, the gasket seal periphery is fixed on the housing, and the intermediate portion controls it by spring and sealed mouth is fitted.

7. a kind of fluid pipeline pump leakage protective system according to claim 4, it is characterized in that: the resistance valve of described band venting valve comprises before the two mutual serial connections, rear case, the two housings inner chamber is interconnected, wherein the water intake of rear case is located at front case water outlet position, be provided with sealed mouth in the cavity of described two housings water intake and water outlet connection, wherein sealed mouth is provided with the sealing head that can be controlled itself and sealed mouth applying by spring in the front case, be provided with gasket seal in the rear case, sealing pad periphery is fixed on the rear case, and the intermediate portion controls it by spring and sealed mouth is fitted.

8. a kind of fluid pipeline pump leakage protective system according to claim 4, it is characterized in that: the resistance valve of described band venting valve comprises before the two mutual serial connections, rear case, the two housings inner chamber is interconnected, wherein the water intake of rear case is located at front case water outlet position, be provided with sealed mouth in the cavity of described two housings water intake and water outlet connection, be provided with gasket seal in the described front case, sealing pad periphery is fixed on the front case, the intermediate portion is controlled itself and sealed mouth by spring and is fitted, and sealed mouth is provided with the sealing head that can be controlled itself and sealed mouth applying by spring in the rear case.

9. a kind of fluid pipeline pump leakage protective system according to claim 4, it is characterized in that: the resistance valve of described band venting valve comprises two mutually before the serial connection, rear case, the two housings inner chamber is interconnected, wherein the water intake of rear case is located at front case water outlet position, be provided with sealed mouth in the cavity of described two housings water intake and water outlet connection, be equipped with the sealing head that to control itself and sealed mouth applying by spring on the sealed mouth in the two housings.

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