CN204729636U - A kind of Pilot operated check valve - Google Patents
A kind of Pilot operated check valve Download PDFInfo
- Publication number
- CN204729636U CN204729636U CN201520396411.7U CN201520396411U CN204729636U CN 204729636 U CN204729636 U CN 204729636U CN 201520396411 U CN201520396411 U CN 201520396411U CN 204729636 U CN204729636 U CN 204729636U
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- piston
- piston cavity
- valve pocket
- valve
- spool
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Abstract
The utility model relates to a kind of Pilot operated check valve.It comprises valve body, and valve body has axial center hole, and its upper and lower end has upper cover and lower cover respectively.One section of center hole on valve body top is valve pocket, one section of center hole of bottom is piston cavity.Under cover the control port with piston cavity UNICOM.Valve body there is the filler opening be communicated with valve pocket.Valve body between valve pocket and piston cavity has oil outlet, and oil outlet is communicated with valve pocket.There is spool in valve pocket, between spool and upper cover, have the first spring, in valve pocket lower end, have the first air ring.There is rod aperture on piston cavity top, has piston in piston cavity, and piston and valve core chamber have push rod, and push rod one end is connected with piston, and the push rod the other end withstands on spool lower end through after the rod aperture on piston cavity top in sealing shape slip shape.Be characterized in there is spring seat in piston cavity top, spring seat and piston space have the second spring.Adopt the utility model, stuck when can avoid piston reset, stopping state occurs, and guarantees that Pilot operated check valve can normally work.
Description
Technical field
The utility model relates to a kind of valve.Specifically, be used to control the Pilot operated check valve that liquid carries out one-way flow.
Background technique
All know at valve production field, Pilot operated check valve can control by the unidirectional switching being used for realizing oil circuit of outside oil pressure.Traditional Pilot operated check valve comprises valve body, and described valve body is cylindric, and it has axial center hole, and its upper and lower end is connected with upper cover and lower cover in sealing shape respectively.One section of center hole on valve body top and one section of center hole internal diameter of bottom are all greater than that section of center hole in the middle of it, thus form valve pocket by one section of center hole on top, one section of center hole of bottom forms piston cavity.Under covered control port, this control port is communicated with piston cavity; The valve body corresponding to valve pocket has filler opening, and filler opening is communicated with valve pocket.Valve body between valve pocket and piston cavity has oil outlet, and this oil outlet is communicated with valve pocket.Having in described valve pocket can along valve pocket spool in axial sliding, and with the first spring between spool and upper cover, have the first air ring in described valve pocket lower end, described first air ring is abutted together in a non-operative state and between the neighboring terminal of spool.There is rod aperture on piston cavity top, and have in piston cavity and can carry out piston in axial sliding along piston cavity, piston and valve core chamber have push rod, and push rod one end is connected with piston, and the push rod the other end withstands on spool lower end through after the rod aperture on piston cavity top in sealing shape slip shape.Owing to only having in the piston cavity of this Pilot operated check valve and can carry out piston in axial sliding along piston cavity, after inside contracting under the oil pressure effect at filler opening when piston and push rod thereof, filler opening is when stopping oil-feed making piston reset, piston can only rely on gravity reduction, when the unfavorable conditions such as fluid viscosity is excessive occur, easily there is stuck, stopping state in piston, make Pilot operated check valve disabler, cannot normally work.
Model utility content
Problem to be solved in the utility model is to provide a kind of Pilot operated check valve.Adopt this Pilot operated check valve, when plug can be avoided to reset, seizure of piston, stopping state occur, and avoid Pilot operated check valve disabler, guarantee that it can normally work.
The problems referred to above to be solved in the utility model are realized by following technological scheme:
Pilot operated check valve of the present utility model comprises valve body, and described valve body is cylindric, and it has axial center hole, and its upper and lower end is connected with upper cover and lower cover in sealing shape respectively.One section of center hole on valve body top and one section of center hole internal diameter of bottom are all greater than that section of center hole in the middle of it, thus form valve pocket by one section of center hole on top, one section of center hole of bottom forms piston cavity.Under covered control port, this control port is communicated with piston cavity.The valve body corresponding to valve pocket has filler opening, and filler opening is communicated with valve pocket.Valve body between valve pocket and piston cavity has oil outlet, and this oil outlet is communicated with valve pocket.Have in described valve pocket and along valve pocket spool in axial sliding, can have the first spring between spool and upper cover, have the first air ring in described valve pocket lower end, described first air ring is abutted together in a non-operative state and between the neighboring terminal of spool.There is rod aperture on piston cavity top, and have in piston cavity and can carry out piston in axial sliding along piston cavity, piston and valve core chamber have push rod, and push rod one end is connected with piston, and the push rod the other end withstands on spool lower end after passing the rod aperture on piston cavity top in sealing shape slip shape; It is characterized in that there is spring seat in piston cavity top, spring seat and piston space have the second spring.
Further improvement of the utility model scheme is, has the second air ring between spring seat and piston cavity top.
Further improvement project of the present utility model is, together with closely cooperating between gland with valve pocket inwall.
Owing to being provided with spring seat in piston cavity top, spring seat and piston space are provided with the second spring, after inside contracting under the oil pressure effect at filler opening when piston and push rod thereof, filler opening is when stopping oil-feed making piston reset, piston is positive return under spring force, piston there will not be stuck, stopping state, the situation generation that avoid Pilot operated check valve disabler, normally cannot work.
Accompanying drawing explanation
Fig. 1 is Pilot operated check valve structural representation of the present utility model.
Embodiment
As shown in Figure 1, Pilot operated check valve of the present utility model comprises valve body 16, and described valve body 16 is cylindric, and it is processed with axial center hole, and its upper and lower end is connected with upper cover 2 and lower cover 14 by bolt 3 and seal ring 1 in sealing shape respectively.One section of center hole on valve body 16 top and one section of center hole internal diameter of bottom are all greater than that section of center hole in the middle of it, thus form valve pocket 7 by one section of center hole on top, one section of center hole of bottom forms piston cavity 11.Described lower cover 14 is processed with control port 13, and this control port is communicated with piston cavity 11.The valve body 16 corresponding to valve pocket 7 is processed with filler opening 19, and this filler opening is communicated with valve pocket 7.Valve body 16 between valve pocket 7 and piston cavity 11 is processed with oil outlet 8, and this oil outlet is communicated with valve pocket 7.Be provided with in described valve pocket 7 and along valve pocket 7 spool 5 in axial sliding, can be provided with the first spring 4 between spool 5 and upper cover 2, described valve pocket 7 lower end is provided with the first air ring 18, and this first air ring is abutted together in a non-operative state and between the neighboring terminal of spool 5.Piston cavity 11 top is processed with rod aperture, be provided with in piston cavity 11 and can carry out piston 15 in axial sliding along piston cavity 11, push rod 17 is provided with between piston 15 and spool 5, push rod 17 one end is connected with piston 15, and push rod 17 the other end withstands on spool 5 lower end through after the rod aperture on piston cavity 11 top in sealing shape, slip shape.Be provided with spring seat 10 in described piston cavity 11 top, between spring seat 10 and piston 15, be provided with the second spring 12.Wherein, the second air ring 9 is provided with between spring seat 10 and piston cavity 11 top.
Gland 6 is provided with, together with closely cooperating between gland 6 with valve pocket 7 inwall between described valve pocket 7 and spool 5.
When fluid enters control port 13, under the effect of piston 15, second spring 12, make push rod 17 back down spool 5, make fluid flow to oil outlet 8 from filler opening 19, realize the unlatching of Pilot operated check valve.When control port 13 does not have fluid, push rod 17 resets, and spool 5 and the first air ring 18 form conical seal (contact) face and seal under the effect of the first spring 4, realize the closedown of Pilot operated check valve.
Claims (3)
1. a Pilot operated check valve, comprises valve body (16), and described valve body (16), for cylindric, it has axial center hole, and its upper and lower end is connected with upper cover (2) and lower cover (14) in sealing shape respectively; One section of center hole on valve body (16) top and one section of center hole internal diameter of bottom are all greater than that section of center hole in the middle of it, thus form valve pocket (7) by one section of center hole on top, one section of center hole of bottom forms piston cavity (11); Lower cover (14) has control port (13), this control port is communicated with piston cavity (11); Have filler opening (19) with on the corresponding valve body (16) of valve pocket (7), and filler opening (19) is communicated with valve pocket (7); Valve body (16) between valve pocket (7) and piston cavity (11) has oil outlet (8), and this oil outlet is communicated with valve pocket (7); Having in described valve pocket (7) can along valve pocket (7) spool (5) in axial sliding, the first spring (4) is had between spool (5) and upper cover (2), have the first air ring (18) in described valve pocket (7) lower end, described first air ring (18) is abutted together in a non-operative state and between the neighboring terminal of spool (5); There is rod aperture on piston cavity (11) top, have in piston cavity (11) and piston (15) in axial sliding can be carried out along piston cavity (11), push rod (17) is had between piston (15) and spool (5), push rod (17) one end is connected with piston (15), and push rod (17) the other end withstands on spool (5) lower end after passing the rod aperture on piston cavity (11) top in sealing shape slip shape; It is characterized in that there is spring seat (10) in piston cavity (11) top, between spring seat (10) and piston (15), have the second spring (12).
2. Pilot operated check valve according to claim 1, is characterized in that there is the second air ring (9) between spring seat (10) and piston cavity (11) top.
3. Pilot operated check valve according to claim 1 and 2, is characterized in that there is gland (6) between described valve pocket (7) and spool (5), together with closely cooperating between gland (6) with valve pocket (7) inwall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520396411.7U CN204729636U (en) | 2015-06-10 | 2015-06-10 | A kind of Pilot operated check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520396411.7U CN204729636U (en) | 2015-06-10 | 2015-06-10 | A kind of Pilot operated check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204729636U true CN204729636U (en) | 2015-10-28 |
Family
ID=54387989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520396411.7U Active CN204729636U (en) | 2015-06-10 | 2015-06-10 | A kind of Pilot operated check valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN204729636U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937627A (en) * | 2016-06-24 | 2016-09-14 | 海天塑机集团有限公司 | Hydraulic control one-way connector of two-stage squeezing machine |
| CN106150811A (en) * | 2016-08-29 | 2016-11-23 | 浙江巴腾动力系统有限公司 | Injection pump of engine |
| CN113803504A (en) * | 2021-09-17 | 2021-12-17 | 沈阳工程学院 | Hydraulic control one-way valve for terminal information acquisition of Internet of things |
-
2015
- 2015-06-10 CN CN201520396411.7U patent/CN204729636U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105937627A (en) * | 2016-06-24 | 2016-09-14 | 海天塑机集团有限公司 | Hydraulic control one-way connector of two-stage squeezing machine |
| CN106150811A (en) * | 2016-08-29 | 2016-11-23 | 浙江巴腾动力系统有限公司 | Injection pump of engine |
| CN113803504A (en) * | 2021-09-17 | 2021-12-17 | 沈阳工程学院 | Hydraulic control one-way valve for terminal information acquisition of Internet of things |
| CN113803504B (en) * | 2021-09-17 | 2023-04-18 | 沈阳工程学院 | Hydraulic control one-way valve for terminal information acquisition of Internet of things |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |