CN100443729C - Leak-proof method and system for fluid pipeline pump - Google Patents
Leak-proof method and system for fluid pipeline pump Download PDFInfo
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- CN100443729C CN100443729C CNB2006101568934A CN200610156893A CN100443729C CN 100443729 C CN100443729 C CN 100443729C CN B2006101568934 A CNB2006101568934 A CN B2006101568934A CN 200610156893 A CN200610156893 A CN 200610156893A CN 100443729 C CN100443729 C CN 100443729C
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Abstract
A method and system for preventing the leakage of pump on fluid pipeline is characterized by that a pressure limiting valve with water channel breaking protector is arranged on the water inlet pipe and a choke valve with sealing unit is arranged at outlet of pump for controlling the fluid cut-off by fluid pressure and in turn preventing the leakage of pump. The rated pressure of choke valve is lower than that of fluid provided by pump but higher than the limited pressure of choke valve.
Description
[technical field]
The present invention relates to a kind of leakage protective system of fluid pipeline pump, be specially anti-leaking method and the leakage protective system of pump when stopping in a kind of pipeline work.
[background technique]
At present, be loaded on the pump on the fluid line 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.
[summary of the invention]
The present invention is directed to the above-mentioned defective of prior art; a kind of anti-leaking method and leakage protective system of fluid pipeline pump are provided; be intended to substitute in the prior art pump housing on the fluid line 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, technological scheme proposed by the invention is:
A kind of fluid pipeline pump anti-leaking method; it is the pressure-limit valve that a restriction conduit fluid pressure is set on the intake pipe of pump; simultaneously on the outlet end of described pump or outlet conduit, a resistance valve is set; control the partition of fluid by the pressure of fluid; to prevent to be loaded on pump on the fluid line when shutting down, because the mobile leakage that causes of fluid.Wherein: the qualification pressure of the rated pressure＞pressure-limit valve of pressure＞resistance valve that described pump provides to fluid.
The present invention according to the designed system of said method is: a kind of fluid pipeline pump leakage protective system, comprise pump and the pipeline that is attached thereto, the pressure-limit valve of one restriction conduit fluid pressure is set on the intake pipe of described pump, on the outlet end of described pump or outlet conduit, is provided with simultaneously one and cuts off the mobile resistance valve of fluid by hydrodynamic pressure control.Wherein: the qualification pressure of the rated pressure＞pressure-limit valve of pressure＞resistance valve that described pump provides to fluid.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 mutual serial connection housing and rear case before, the inner chamber of described front case and rear case is interconnected, wherein the water intake of rear case is located at front case water outlet position, sealed mouth and back sealed mouth before being respectively equipped with in the cavity of described front case and rear case, wherein the preceding sealed mouth in the front case is provided with by the sealing head and the described preceding sealed mouth of spring control and fits, be provided with gasket seal in the rear case, sealing pad periphery is fixed on the rear case, and the intermediate portion is controlled it by spring and fitted with the back sealed mouth; Perhaps: be provided with gasket seal in the described front case, sealing pad periphery is fixed on the front case, and the intermediate portion controls it by spring and preceding sealed mouth is fitted, and the back sealed mouth in the rear case is provided with by the sealing head of spring control and described back sealed mouth and fits; Perhaps be: be equipped with on sealed mouth and the back sealed mouth before forward and backward two housings is interior by the sealing head and the described preceding sealed mouth of spring control and fit with the back sealed mouth.
The present invention is by being provided with pressure-limit valve on the intake pipe 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 band water cut-off protection function of the present invention;
Fig. 2 is the structural representation of the resistance valve of band sealing head of the present invention;
Fig. 3 is the structural representation of the resistance valve of band gasket seal of the present invention;
Fig. 4 is the structural representation of the resistance valve of band venting valve of the present invention;
Fig. 5 is the system diagram of Application Example one of the present invention;
Fig. 6 is the system diagram of Application Example two of the present invention.
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. sealed mouth 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 intake 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 present invention is primarily aimed at the existing in prior technology defective and the improvement carried out.
The present invention has at first proposed a kind of anti-leaking method, can make pump on the fluid line when shutting down, and prevents the leakage phenomenon that produces because of flow of fluid.It specifically is that a pressure-limit valve is set on the intake pipe of 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; can prevent to be loaded on pump on the fluid line when shutting down, because the mobile leakage that causes of fluid.
In whole pipe, 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 outlet conduit
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 purpose of the present invention.
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 present invention; 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 present invention selects for use the pressure-limit valve of band water cut-off protection function more safe.
According to above-mentioned design concept, the present invention has designed a kind of leakage protective system that is used for the pump on the fluid line, this 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 intake pipe of described pump, simultaneously on the outlet end of described pump or outlet conduit, a resistance valve is set, be connected with pipeline between pump and each valve, formed a leakage protective system, can be applicable to various occasions.
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 invention 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 present invention's leakage protective system 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 outlet conduit
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 outlet conduit 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 11-41 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 11-34 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 system of the present invention.
Below introduce characteristics of the present invention and advantage in detail by specific embodiments of the invention 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 claim of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (9)
1, a kind of fluid pipeline pump anti-leaking method; it is the pressure-limit valve that a restriction conduit fluid pressure is set on the intake pipe of pump; simultaneously on the outlet end of described pump or outlet conduit, a resistance valve is set; control the partition of fluid by the pressure of fluid; to prevent to be loaded on pump on the fluid line when shutting down; leakage owing to flowing of fluid causes is characterized in that: the qualification pressure of the rated pressure＞pressure-limit valve of pressure＞resistance valve that described pump provides to fluid.
2, a kind of fluid pipeline pump anti-leaking method according to claim 1 is characterized in that: described pressure-limit valve is the pressure-limit valve of band water cut-off protection function.
3, a kind of fluid pipeline pump leakage protective system, comprise pump and the pipeline that is attached thereto, the pressure-limit valve of one restriction conduit fluid pressure is set on the intake pipe of described pump, on the outlet end of described pump or outlet conduit, be provided with simultaneously one and cut off the mobile resistance valve of fluid, it is characterized in that: the qualification pressure of the rated pressure＞pressure-limit valve of pressure＞resistance valve that described pump provides to fluid by hydrodynamic pressure control.
4, a kind of fluid pipeline pump leakage protective system according to claim 3 is characterized in that: described pressure-limit valve is the pressure-limit valve of band water cut-off protection function.
5, a kind of fluid pipeline pump leakage protective system according to claim 3 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.
6, a kind of fluid pipeline pump leakage protective system according to claim 5, 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 of being controlled itself and sealed mouth applying by spring.
7, a kind of fluid pipeline pump leakage protective system according to claim 5, 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.
8, a kind of fluid pipeline pump leakage protective system according to claim 5, it is characterized in that: the resistance valve of described band venting valve comprises mutual serial connection housing and rear case before, the inner chamber of described front case and rear case is interconnected, wherein the water intake of rear case is located at front case water outlet position, sealed mouth and back sealed mouth before being respectively equipped with in the cavity of described front case and rear case, wherein be located at preceding sealed mouth in the front case and be provided with sealing head and described preceding sealed mouth applying by spring control, be provided with gasket seal in the rear case, sealing pad periphery is fixed on the rear case, and the intermediate portion is controlled it by spring and fitted with the back sealed mouth; Or be: be provided with gasket seal in the front case, sealing pad periphery is fixed on the front case, and the intermediate portion is controlled itself and preceding sealed mouth by spring and fitted, and is located at back sealed mouth in the rear case and is provided with sealing head and the applying of described sealed mouth afterwards by spring control.
9, a kind of fluid pipeline pump leakage protective system according to claim 5, it is characterized in that: the resistance valve of described band venting valve, comprise mutual serial connection housing and rear case before, the inner chamber of described front case and rear case is interconnected, wherein the water intake of rear case is located at front case water outlet position, sealed mouth and back sealed mouth before being respectively equipped with in the cavity of described front case and rear case, described before sealed mouth and back be equipped with on the sealed mouth by the sealing head of spring control with described before sealed mouth and after the sealed mouth applying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101568934A CN100443729C (en) | 2006-11-17 | 2006-11-17 | Leak-proof method and system for fluid pipeline pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101568934A CN100443729C (en) | 2006-11-17 | 2006-11-17 | Leak-proof method and system for fluid pipeline pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1987110A CN1987110A (en) | 2007-06-27 |
| CN100443729C true CN100443729C (en) | 2008-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101568934A Expired - Fee Related CN100443729C (en) | 2006-11-17 | 2006-11-17 | Leak-proof method and system for fluid pipeline pump |
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| Country | Link |
|---|---|
| CN (1) | CN100443729C (en) |
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|---|---|---|---|---|
| US3137236A (en) * | 1963-03-13 | 1964-06-16 | Twin Disc Clutch Co | Pressure control for fluid systems |
| GB1229849A (en) * | 1967-06-22 | 1971-04-28 | ||
| JPS5077789A (en) * | 1973-10-17 | 1975-06-25 | ||
| CN2163255Y (en) * | 1993-06-04 | 1994-04-27 | 张秩芝 | Electric motor automatic protecting and controlling device for deep well submersible pump |
| CN2310875Y (en) * | 1997-09-22 | 1999-03-17 | 徐钊生 | Pressure pump with pressure preset device |
| CN2379665Y (en) * | 1999-06-10 | 2000-05-24 | 吕春军 | Automatic operating valve of fire hydrant |
| CN2775346Y (en) * | 2005-04-13 | 2006-04-26 | 尹凯 | Plunger pump combined valve |
| CN1837661A (en) * | 2006-04-17 | 2006-09-27 | 杨克庆 | Safety valve |
| CN201053399Y (en) * | 2007-06-01 | 2008-04-30 | 杨克庆 | Fluid pipe leakage-proof system for pump |
-
2006
- 2006-11-17 CN CNB2006101568934A patent/CN100443729C/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3137236A (en) * | 1963-03-13 | 1964-06-16 | Twin Disc Clutch Co | Pressure control for fluid systems |
| GB1229849A (en) * | 1967-06-22 | 1971-04-28 | ||
| JPS5077789A (en) * | 1973-10-17 | 1975-06-25 | ||
| CN2163255Y (en) * | 1993-06-04 | 1994-04-27 | 张秩芝 | Electric motor automatic protecting and controlling device for deep well submersible pump |
| CN2310875Y (en) * | 1997-09-22 | 1999-03-17 | 徐钊生 | Pressure pump with pressure preset device |
| CN2379665Y (en) * | 1999-06-10 | 2000-05-24 | 吕春军 | Automatic operating valve of fire hydrant |
| CN2775346Y (en) * | 2005-04-13 | 2006-04-26 | 尹凯 | Plunger pump combined valve |
| CN1837661A (en) * | 2006-04-17 | 2006-09-27 | 杨克庆 | Safety valve |
| CN201053399Y (en) * | 2007-06-01 | 2008-04-30 | 杨克庆 | Fluid pipe leakage-proof system for pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1987110A (en) | 2007-06-27 |
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