CN2126324U - Combined pump valve without percussion - Google Patents
Combined pump valve without percussion Download PDFInfo
- Publication number
- CN2126324U CN2126324U CN 92225735 CN92225735U CN2126324U CN 2126324 U CN2126324 U CN 2126324U CN 92225735 CN92225735 CN 92225735 CN 92225735 U CN92225735 U CN 92225735U CN 2126324 U CN2126324 U CN 2126324U
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- Prior art keywords
- valve
- resistance
- pump
- operating
- disc
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Abstract
The utility model provides a combined shock free pump valve. A resistance valve is additionally arranged on an original working valve, and the two valves are in series connection. The valve disc of the resistance valve is all-metal and shockproof, and doesn't need strict seal. When the pump valve closes, the resistance valve closes firstly to make the hydraulic pressure above the working valve nearly zero, and the valve disc of the working valve closes under the action of self-weight and spring force. Without high pressure liquid, the working valve closes in the state nearly without any shock. The pump valve with the structure can extend the service life and provides favorable conditions for the increase of stroke frequency, pressure, and discharge capacity of reciprocating pumps.
Description
The utility model relates to a kind of pump valve of working under nothing is impacted.
At present, the pump valve operating life of the reciprocating pump that oil drilling is used is all very short, on average has only 50-60 hour.Its main cause is the mass inertia of valve disc and the valve disc unsettled influence of pressure difference up and down, makes the motion of pump valve and pump piston inharmonious, always lag behind phase angle of motion of piston of valve disc motion.According to measuring, when the jig frequency of pump was per minute 63 times, the suction valve closure retardation angle was 14.5 °, and it is 10 ° that expulsion valve cuts out retardation angle; When jig frequency was per minute 71 times, the suction valve closure retardation angle was 18.5 °, and it is 10.3 ° that expulsion valve cuts out retardation angle; When jig frequency was per minute 88 times, the suction valve closure retardation angle was 42 °, and it is 12 ° that expulsion valve cuts out retardation angle.Obviously, the jig frequency of pump is big more, and the retardation phenomenon that pump valve cuts out is serious more.The jig frequency of modern drilling pump is up to per minute 120-160 time, the order of severity that its pump valve hysteresis not hard to imagine is closed.Because pump valve lags behind and cuts out, moment before closing, valve disc forms very big pressure reduction up and down, and the highly pressurised liquid of valve disc top will promote valve disc and fall with great speed, valve disc is knocked on valve seat, form " water hammer " phenomenon, and this " water hammer " power is often very big, for example the hydraulic pressure when the valve disc top is 15MPa, when the valve port latus rectum is 100 millimeters, " water hammer " power will reach 11.78 tons, and under this continuous serious impact, the sealing gasket on the valve disc has damaged soon just.
For addressing this problem, all carried out research both at home and abroad, but people's research all concentrates on the characteristics of motion of valve and the impact resistance aspect of valve, on pump valve sealing material, technology, structure, improve, develop various pump valve structures, as the valve of damper valve, filter sand valve, two conical valve and various different rubber sealing structures.But these valves all do not have to solve the pump valve shock problem under the high jig frequency at all, so the operating life of valve is still very short, need in the work progress often to change pump valve, have increased working strength of workers, influence the normal use of pump.Because the restriction in pump valve life-span has a strong impact on the raising of jig frequency, pressure and the discharge capacity of pump.
The purpose of this utility model is that a kind of pump valve of eliminating impact will be provided, and it can make the pump valve valve disc work under the situation of not having impact or minimum impact, and the pump valve life-span is prolonged.
The purpose of this utility model is achieved in that and adds a pump valve again on original pump valve, and former pump valve is called operating valve, after the valve that adds be called resistance valve.Operating valve and resistance valve are cascaded structure, can arrange up and down, also can install side by side.Not having sealing gasket on the valve disc of resistance valve, is all-metal, and it does not need strict seal.Spring rate on the resistance valve is bigger than the spring rate on the operating valve.The stem guiding hole is arranged in the space between resistance valve and the operating valve, support, be used for the operating valve stem guiding with stiffening rib.
The utility model has been owing to increased a pump valve again on original pump valve, when the pump suction process begins, resistance valve at first cuts out, and moment of operating valve hysteresis resistance valve closes.Moment before operating valve is closed after resistance valve cuts out, fluid pressure descends significantly in the space between operating valve and the resistance valve, and the operating valve valve disc drops on the valve seat under deadweight and spring force effect, and its whereabouts impact force reduces greatly, has eliminated impact basically.
Concrete structure of the present utility model is provided by following embodiment and accompanying drawing.
Accompanying drawing is not have the sectional drawing that impacts pump valve according to the combined type that the utility model proposes.
Among the figure, 1-1: resistance valve spring, 1-2: resistance valve valve disc, 1-3: resistance valve valve seat, 1-4: resistance valve clack box, 2-1: operating valve spring, 2-2: operating valve valve disc, 2-3: operating valve valve seat, 2-4: operating valve clack box, 5: seal washer, 6: operating valve valve disc sealing gasket, 7: valve gap.
Describe in detail according to pump valve concrete structure and the working condition that the utility model proposes below in conjunction with accompanying drawing.
Adorn a resistance valve on former operating valve, add seal washer (5) between two valves, two valve sizes are identical, and the space between two valves communicates.There is not sealing gasket on the resistance valve valve disc (1-2), but all-metal, because of it need not strict seal.Spring in the resistance valve (1-1) ratio of rigidity operating valve spring (2-1) rigidity is big, and top cover (7) is arranged on the resistance valve, is the stem guiding groove in the middle of the top cover.During work, highly pressurised liquid at first backs down operating valve from bottom to top, opens resistance valve again, and whole pump valve is opened.When closing, the highly pressurised liquid of pump valve top at first acts on the resistance valve, adds that the spring rate of resistance valve is bigger, and the valve disc of resistance valve at first falls, and is because resistance valve need not strict seal, so valve disc is all-metal, shock-resistant.After resistance valve cuts out, fluid pressure in the space that forms between resistance valve and the operating valve is almost nil, the operating valve valve disc also falls under the effect of deadweight and spring force very soon, but much smaller than under the highly pressurised liquid effect of falling speed at this moment and impact force, almost do not have impact during the whereabouts, thereby can prolong its operating life greatly.The nothing that the utility model proposed is impacted the pump valve structure, for jig frequency, pressure and the discharge capacity that improves reciprocating pump provides advantage.
Claims (4)
1, a kind of combined type pump valve is made up of operating valve and resistance valve, it is characterized in that operating valve and resistance valve are cascaded structure.
2, combined type pump valve according to claim 1, the valve disc that it is characterized in that resistance valve is all-metal.
3, combined type pump valve according to claim 1 is characterized in that the spring rate on the resistance valve is bigger than the spring rate on the operating valve.
4, combined type pump valve according to claim 1 is characterized in that the stem guiding groove that has stiffening rib to support in the space between resistance valve and the operating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92225735 CN2126324U (en) | 1992-06-29 | 1992-06-29 | Combined pump valve without percussion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92225735 CN2126324U (en) | 1992-06-29 | 1992-06-29 | Combined pump valve without percussion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2126324U true CN2126324U (en) | 1992-12-30 |
Family
ID=4967879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92225735 Granted CN2126324U (en) | 1992-06-29 | 1992-06-29 | Combined pump valve without percussion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2126324U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095967C (en) * | 1998-12-10 | 2002-12-11 | 今田义夫 | Structure of choke valve |
| CN101892698B (en) * | 2009-05-21 | 2014-02-26 | 刘命辉 | Water film antifouling and wash water controlling device of shower toilet |
-
1992
- 1992-06-29 CN CN 92225735 patent/CN2126324U/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095967C (en) * | 1998-12-10 | 2002-12-11 | 今田义夫 | Structure of choke valve |
| CN101892698B (en) * | 2009-05-21 | 2014-02-26 | 刘命辉 | Water film antifouling and wash water controlling device of shower toilet |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |