CN204267804U - Pilot operated check valve - Google Patents
Pilot operated check valve Download PDFInfo
- Publication number
- CN204267804U CN204267804U CN201420719670.4U CN201420719670U CN204267804U CN 204267804 U CN204267804 U CN 204267804U CN 201420719670 U CN201420719670 U CN 201420719670U CN 204267804 U CN204267804 U CN 204267804U
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- China
- Prior art keywords
- groove
- check valve
- valve
- pilot operated
- inner elements
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of Pilot operated check valve, its drip irrigation device is that the fitting surface of described inner elements of check valve and valve rod is provided with the first groove arranged vertically, described first groove communicates with oil outlet, described stem surface is provided with the second groove vertically, described second groove communicates with filler opening, when control mouth oil pressure is 0, first groove left end and the second groove right-hand member keep certain distance, during Pilot operated check valve off-load, after valve rod moves a certain distance, first groove contacts with the second groove and realizes conducting, at this moment, the fluid of oil outlet end elevated pressures begins through the first groove and the second groove flows to filler opening, groove plays the effect of damping hole, produce the pressure loss, make the fluid of outflow can be very little to the impact force of pipeline, the pressure at inner elements of check valve place steadily declines.
Description
Technical field
The utility model relates to a kind of one-way valve, and more particularly, it relates to a kind of Pilot operated check valve.
Background technique
Compared with common one-way valve, on Pilot operated check valve, many one controls mouth, when controlling mouth and not passing into pressure oil liquid, Pilot operated check valve is the same with common one-way valve to work, namely pressure oil only flows to oil outlet from filler opening, can not reverse flow, and after control mouth passes into pressure oil liquid, push rod can move right under the promotion of pressure oil liquid, and finally backing down inner elements of check valve, filler opening and oil outlet are connected, and pressure oil just starts to flow to filler opening from oil outlet, namely the former road of pressure oil returns, and realizes off-load.Because above-mentioned push rod is in the moment of pushing inner elements of check valve open, the fluid of oil outlet end elevated pressures can rush at filler opening end suddenly, and it is anxious to flowing in the pipeline that is connected with filler opening end, the fluid pressure in pipeline is caused to increase suddenly, pipeline is formed and impacts, the change that generation is huge suddenly and inner elements of check valve place device is under pressure, reduces Security and the working life of Pilot operated check valve widely.
Model utility content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of moment in off-load, greatly can reduce oil outlet end elevated pressures fluid to pipeline impact force and the less Pilot operated check valve of impact force suffered by device.
For achieving the above object, the utility model provides following technological scheme: a kind of Pilot operated check valve, comprise and offer control mouth, the valve body of filler opening and oil outlet and the push rod be arranged on successively from left to right in valve body valve pocket, one-way valve sleeve, one-way valve seat and swivel nut, described push rod coordinates with valve seal, described one-way valve seat agrees with between one-way valve sleeve and valve body, the inner left end of described swivel nut is equipped with inner elements of check valve and the first Returnning spring, inner elements of check valve left end and one-way valve seat are sealed and matched, conflict with inner elements of check valve and swivel nut respectively and be connected in the two ends of the first Returnning spring, the valve rod that described one-way valve core inner has one to be sealed and matched, conflict with push rod through inner elements of check valve and be connected in one end of valve rod, the other end of valve rod is connected with baffle plate, the one side of baffle plate is conflicted with valve body and is connected, baffle plate another side is conflicted the second Returnning spring, second Returnning spring right-hand member and swivel nut inconsistent, the fitting surface of described inner elements of check valve and valve rod is provided with the first groove arranged vertically, described first groove communicates with oil outlet, described stem surface is provided with the second groove vertically, described second groove communicates with filler opening, under oil pressure effect, described inner elements of check valve and valve rod relative sliding, described first groove left end is connected with the second groove.
By adopting the improvement of technique scheme, during Pilot operated check valve off-load, first push rod can promote valve rod and move right, valve rod promotes baffle plate to the right and compresses the second Returnning spring, after valve rod moves a certain distance, first groove contacts with the second groove and realizes conducting, at this moment, the fluid of oil outlet end elevated pressures begins through the first groove and the second groove flows to filler opening, due to the structure that groove is elongated, the flow area of working fluid is reduced, produce the pressure loss, so groove plays the effect of damping hole, make the fluid of outflow can be very little to the impact force of pipeline, and the fluid of oil outlet end elevated pressures is after groove flows out, the force value of oil outlet end fluid can decline rapidly stably, the pressure at inner elements of check valve place steadily declines, push rod continues to advance to the right, inner elements of check valve is pushed open by push rod, inner elements of check valve compresses the first Returnning spring, now, the inner elements of check valve that the fluid of oil outlet end lower pressure just starts through opening flows to filler opening end, due to oil outlet end oil liquid pressure step-down, there is a part of fluid in filler opening, so greatly reduce oil outlet end elevated pressures fluid to the impact force of pipeline, and the pressure of inner elements of check valve place instantaneous variation reduces, the impact force that instantaneous variation produces is born together with the second Returnning spring by the first Returnning spring, substantially increase the Security at inner elements of check valve place.
As improvement of the present utility model, the quantity of described first groove is multiple and along the circumferential evenly arrangement of inner elements of check valve, the quantity of described second groove is multiple and evenly arranges along valve rod circumference.
As improvement of the present utility model, described valve rod is circumferentially provided with annular groove, and annular groove is connected with the second groove, and under oil pressure effect, described inner elements of check valve and valve rod relative sliding, described first groove left end is connected with annular groove.
As improvement of the present utility model, the quantity of the second groove is greater than the quantity of the first groove.
As improvement of the present utility model, described annular groove is axial vertical with valve rod.
By adopting the improvement of technique scheme, make the fluid in the first groove first flow to annular groove and flow to the second groove again, play certain buffer function, and the first groove and the second groove respectively inner elements of check valve week and valve rod to even arrangement, annular groove is axial vertical with valve rod, ensure that the sealing between inner elements of check valve and valve rod, when the quantity of the second groove is greater than the quantity of the first groove, the oil liquid pressure flowed out in groove is reduced, the impact force of the fluid of outflow to pipeline is reduced further.
As improvement of the present utility model, described swivel nut has been threaded screw plug, and described second Returnning spring right-hand member is conflicted with screw plug and is connected.
By adopting the improvement of technique scheme; the decrement of the second Returnning spring can be changed; change the pressure that push rod promotes valve rod; and bear the instantaneous pressure change produced when off-load; make the first Returnning spring, when pressure changes greatly, violent compression variation can not occur; protect inner elements of check valve and the first Returnning spring, make the first Returnning spring a suitable force value can be kept, improve the range of working pressure of Pilot operated check valve.
As improvement of the present utility model, described valve rod left end is provided with projection, and push rod right-hand member is provided with the restraining groove matched with valve rod left end projection.
By adopting the improvement of technique scheme, the instantaneous pressure produced during off-load change can not make push rod and valve rod radial displacement can not occur, and structure is more stable.
As improvement of the present utility model, described swivel nut is provided with oil leak hole.
By adopting the improvement of technique scheme, the fluid penetrated into from hydraulic tubing in swivel nut can be drained, fluid can not be piled up at swivel nut.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model Pilot operated check valve;
Fig. 2 is the enlarged view at B place in Fig. 1;
Fig. 3 is the stem structure schematic diagram of the utility model Pilot operated check valve;
Fig. 4 is the inner elements of check valve structural representation of the utility model Pilot operated check valve;
The sectional drawing of valve rod and one-way valve cored structure when Fig. 5 is the off-load of the utility model Pilot operated check valve;
Fig. 6 is the sectional drawing of the utility model Pilot operated check valve valve rod and one-way valve cored structure when normally working.
Description of reference numerals: 1, valve body; 2, push rod; 3, one-way valve sleeve; 4, one-way valve seat; 5, swivel nut; 6, inner elements of check valve; 7, the first Returnning spring; 8, the first groove; 9, the second groove; 10, annular groove; 11, valve rod; 12, baffle plate; 13, the second Returnning spring; 14, screw plug; 15, oil leak hole.
Embodiment
With reference to accompanying drawing, the utility model Pilot operated check valve embodiment is described in further details.
Hereafter convenient in order to describe, hereinafter alleged "left", "right", " on ", left and right, the upper and lower of D score and accompanying drawing itself is to consistent.
Referring to figs. 1 through Fig. 4, a kind of Pilot operated check valve, comprise offering and control mouth K, the valve body 1 of oil inlet P and oil outlet A and the push rod 2 be arranged on successively from left to right in valve body 1 valve pocket, one-way valve sleeve 3, one-way valve seat 4 and swivel nut 5, described push rod 2 is sealed and matched with valve body 1, described one-way valve seat 4 agrees with between one-way valve sleeve 3 and valve body 1, the inner left end of described swivel nut 5 is equipped with inner elements of check valve 6 and the first Returnning spring 7, inner elements of check valve 6 left end and one-way valve seat 4 are sealed and matched, conflict with swivel nut 5 with inner elements of check valve 6 respectively and be connected in first Returnning spring 7 two ends, the valve rod 11 that described inner elements of check valve 6 inside has one to be sealed and matched, conflict through inner elements of check valve 6 and push rod 2 and be connected the other end and be fixedly connected with baffle plate 12 in valve rod 11 one end, described valve rod 11 left end is provided with projection, push rod 2 right-hand member is provided with the restraining groove matched with valve rod 11 left end projection, the instantaneous pressure change produced during off-load can not make push rod 2 and valve rod 11 radial displacement can not occur, structure is more stable, screw plug 14 is also provided with in described swivel nut 5, described swivel nut 5 right-hand member inside is provided with the screw thread matched with screw plug 14, described second Returnning spring 13 right-hand member is conflicted with screw plug 14 and is connected, baffle plate 12 is conflicted with valve body 1 and is connected, second Returnning spring 13 right-hand member is fixedly connected with swivel nut 5, screw plug 14 can change the decrement of the second Returnning spring 13, change the pressure that push rod 2 promotes valve rod 11, bear the instantaneous pressure change produced when off-load, make the first Returnning spring 7, when pressure changes greatly, violent compression variation can not occur, protect inner elements of check valve 6 and the first Returnning spring 7, make the first Returnning spring 7 can keep a suitable force value, improve the range of working pressure of Pilot operated check valve, described inner elements of check valve 6 is provided with the first groove 8 vertically with valve rod 11 surface of contact, described first groove 8 right-hand member communicates away from one-way valve seat 4 bottom surface with inner elements of check valve 6, described valve rod 11 is provided with the second groove 9 vertically with inner elements of check valve 6 surface of contact, described second groove 9 left end is connected with valve rod 11 left end, when control mouth k oil pressure is 0, first groove 8 left end and the second groove 9 right-hand member keep certain distance, during Pilot operated check valve off-load, first push rod 2 can promote valve rod 11 and move right, valve rod 11 promotes baffle plate 12 to the right and compresses the second Returnning spring 13, after valve rod 11 moves a certain distance, first groove 8 contacts with the second groove 9 and realizes conducting, at this moment, the fluid of oil outlet end elevated pressures begins through the first groove 8 and the second groove 9 flows to filler opening, due to the structure that groove is elongated, the flow area of working fluid is reduced, produce the pressure loss, so groove plays the effect of damping hole, make the fluid of outflow can be very little to the impact force of pipeline, and the fluid of oil outlet end elevated pressures is after groove flows out, the force value of oil outlet end fluid can decline rapidly stably, the pressure at inner elements of check valve 6 place steadily declines, push rod 2 continues to advance to the right, inner elements of check valve 6 is pushed open by push rod 2, inner elements of check valve 6 compresses the first Returnning spring 7, now, the inner elements of check valve 6 that the fluid of oil outlet end lower pressure just starts through opening flows to filler opening end, due to oil outlet end oil liquid pressure step-down, there is a part of fluid in filler opening, so greatly reduce oil outlet end elevated pressures fluid to the impact force of pipeline, and the pressure of inner elements of check valve 6 place instantaneous variation reduces, the impact force that instantaneous variation produces is born together with the second Returnning spring 13 by the first Returnning spring 7, substantially increase the Security at inner elements of check valve 6 place, when Pilot operated check valve normally runs, push rod 2 does not act on valve rod 11, first groove 8 and the second groove 9 keep certain distance, described swivel nut 5 is also provided with oil leak hole 15, the fluid penetrated into from hydraulic tubing in swivel nut 5 can be drained, fluid can not be piled up at swivel nut 5.
With reference to Fig. 5 to Fig. 6, article 4, the first groove 8 is along the evenly arrangement of inner elements of check valve 6 circumference, 8 second grooves 9 are along the evenly arrangement of valve rod 11 circumference, described valve rod 11 is circumferentially provided with annular groove 10, annular groove 10 is connected with the second groove 9, the quantity of the second groove 9 is greater than the quantity of the first groove 8, described annular groove 10 is axial vertical with valve rod 11, make the fluid in the first groove 8 first flow to annular groove 10 and flow to the second groove 9 again, play certain buffer function, and the first groove 8 and the second groove 9 respectively at inner elements of check valve 6 weeks and valve rod 11 to even arrangement, annular groove 10 is axial vertical with valve rod 11, the pressure that valve rod 11 is subject to keeps relative equilibrium, ensure that the sealing between inner elements of check valve 6 and valve rod 11, and be greater than the quantity of the first groove 8 due to the quantity of the second groove 9, the oil liquid pressure flowed out in groove is reduced, the impact force of the fluid of outflow to pipeline is reduced further.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technological schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (8)
1. a Pilot operated check valve, comprise and offer control mouth, the valve body of filler opening and oil outlet and the push rod be arranged on successively from left to right in valve body valve pocket, one-way valve sleeve, one-way valve seat and swivel nut, described push rod coordinates with valve seal, described one-way valve seat agrees with between one-way valve sleeve and valve body, the inner left end of described swivel nut is equipped with inner elements of check valve and the first Returnning spring, inner elements of check valve left end and one-way valve seat are sealed and matched, conflict with inner elements of check valve and swivel nut respectively and be connected in the two ends of the first Returnning spring, the valve rod that described one-way valve core inner has one to be sealed and matched, conflict with push rod through inner elements of check valve and be connected in one end of valve rod, the other end of valve rod is connected with baffle plate, the one side of baffle plate is conflicted with valve body and is connected, the another side of baffle plate is conflicted and is had the second Returnning spring, right-hand member and the swivel nut of the second Returnning spring are inconsistent, it is characterized in that: the fitting surface of described inner elements of check valve and valve rod is provided with the first groove arranged vertically, described first groove communicates with oil outlet, described stem surface is provided with the second groove vertically, described second groove communicates with filler opening, under oil pressure effect, described inner elements of check valve and valve rod relative sliding, described first groove is connected with the second groove.
2. Pilot operated check valve according to claim 1, is characterized in that: the quantity of described first groove is multiple and along the circumferential evenly arrangement of inner elements of check valve, the quantity of described second groove is multiple and evenly arranges along valve rod circumference.
3. Pilot operated check valve according to claim 2, it is characterized in that: described valve rod is circumferentially provided with annular groove, described annular groove is connected with the second groove, under oil pressure effect, described inner elements of check valve and valve rod relative sliding, described first groove is connected with annular groove.
4. Pilot operated check valve according to claim 3, is characterized in that: the quantity of the second groove is greater than the quantity of the first groove.
5. Pilot operated check valve according to claim 3, is characterized in that: described annular groove is axial vertical with valve rod.
6. the Pilot operated check valve according to claim 1,2,3,4 or 5, is characterized in that: described swivel nut has been threaded screw plug, and described second Returnning spring right-hand member is conflicted with screw plug and is connected.
7. Pilot operated check valve according to claim 1, is characterized in that: described valve rod left end is provided with projection, and push rod right-hand member is provided with the restraining groove matched with valve rod left end projection.
8. Pilot operated check valve according to claim 1, is characterized in that: described swivel nut is provided with oil leak hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420719670.4U CN204267804U (en) | 2014-11-25 | 2014-11-25 | Pilot operated check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420719670.4U CN204267804U (en) | 2014-11-25 | 2014-11-25 | Pilot operated check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204267804U true CN204267804U (en) | 2015-04-15 |
Family
ID=52802674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420719670.4U Expired - Fee Related CN204267804U (en) | 2014-11-25 | 2014-11-25 | Pilot operated check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204267804U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107587888A (en) * | 2017-08-02 | 2018-01-16 | 北京煤科天玛自动化科技有限公司 | A kind of hydraulic control one-way valve with drainage recovery function |
| CN109236779A (en) * | 2018-10-31 | 2019-01-18 | 北京天地玛珂电液控制系统有限公司 | Hydraulic control one-way valve and pressure release assembly |
| CN110173473A (en) * | 2019-04-29 | 2019-08-27 | 裕泰液压技术(上海)有限公司 | A kind of big pilot ratio hydraulic control one-way valve |
| CN110529445A (en) * | 2019-08-29 | 2019-12-03 | 北京天地玛珂电液控制系统有限公司 | Hydraulic control one-way valve |
-
2014
- 2014-11-25 CN CN201420719670.4U patent/CN204267804U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107587888A (en) * | 2017-08-02 | 2018-01-16 | 北京煤科天玛自动化科技有限公司 | A kind of hydraulic control one-way valve with drainage recovery function |
| CN107587888B (en) * | 2017-08-02 | 2019-10-08 | 北京煤科天玛自动化科技有限公司 | A kind of hydraulic control one-way valve with drainage recycling function |
| CN109236779A (en) * | 2018-10-31 | 2019-01-18 | 北京天地玛珂电液控制系统有限公司 | Hydraulic control one-way valve and pressure release assembly |
| CN109236779B (en) * | 2018-10-31 | 2020-07-21 | 北京天地玛珂电液控制系统有限公司 | Hydraulic control one-way valve and pressure relief assembly |
| CN110173473A (en) * | 2019-04-29 | 2019-08-27 | 裕泰液压技术(上海)有限公司 | A kind of big pilot ratio hydraulic control one-way valve |
| CN110173473B (en) * | 2019-04-29 | 2020-11-13 | 裕泰液压技术(上海)有限公司 | Hydraulic control one-way valve with large pilot ratio |
| CN110529445A (en) * | 2019-08-29 | 2019-12-03 | 北京天地玛珂电液控制系统有限公司 | Hydraulic control one-way valve |
| CN110529445B (en) * | 2019-08-29 | 2020-11-17 | 北京天地玛珂电液控制系统有限公司 | Hydraulic control one-way valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150415 Termination date: 20161125 |