CN202560682U - Thin hydraulic cylinder with plug-in type pressure retaining valve - Google Patents
Thin hydraulic cylinder with plug-in type pressure retaining valve Download PDFInfo
- Publication number
- CN202560682U CN202560682U CN2012201347824U CN201220134782U CN202560682U CN 202560682 U CN202560682 U CN 202560682U CN 2012201347824 U CN2012201347824 U CN 2012201347824U CN 201220134782 U CN201220134782 U CN 201220134782U CN 202560682 U CN202560682 U CN 202560682U
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- piston
- pressure retaining
- cylinder body
- retaining valve
- protecgulum
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Abstract
Disclosed is a thin hydraulic cylinder with a plug-in type pressure retaining valve. A valve body cavity is arranged at one end, far away from an opening, of a cylinder body, the valve body cavity is inserted with a plug-in type pressure retaining valve, the side face of the cylinder body is provided with a first oil port and a second oil port, the first oil port is communicated with a first cavity formed by a front cover, the cylinder body and a piston and is connected with the pressure retaining valve through a first oil passage arranged inside the cylinder body, the second oil port is communicated with a second cavity formed by the cylinder body and the piston through a second oil passage arranged inside the cylinder body, and the pressure retaining valve is arranged between the second oil port of the second oil passage and the second cavity. The thin hydraulic cylinder with a plug-in type pressure retaining valve has the advantages that pipeline connections are less and the leakage rate is lower; the oil passages are shorter, the effect is more direct and the response is more sensitive; the piston of the hydraulic cylinder is enabled to be locked at the stroke destination, heavy staffs can be prevented from dropping due to their self-weight, the movement of the piston caused by external load change can be prevented, and one end of the hydraulic cylinder can be locked; positioning is clear so that the oil ports would not be mistaken during the filling process, and adjustment and control are convenient; and the layout is rational, which makes the overall structure of the hydraulic cylinder compact and the appearance beautiful.
Description
Technical field
The utility model relates to technical field of hydraulic oil cylinder, specifically, relates to a kind of thin cylinder that has the plug-in type pressure retaining valve.
Background technique
Pressure retaining valve is typical seat valve, and one-way valve is claimed safety check or check valve again.Be used for hydraulic system and prevent oil stream reverse flow.One-way valve has two kinds of straight-through type and right-angle types.Straight check valve is installed on the pipeline with being threaded.The right-angle type one-way valve is threaded, board-like connection is connected three kinds of forms with flange.
At present, the hydraulic jack that uses in a lot of fields of commercial production comprises a cylinder barrel, and a piston is housed in the cylinder barrel; Piston connects piston rod, and piston rod one bar head connects pressure retaining valve, and pressure retaining valve has a valve seat; Valve base cavity connects spool, and spool is parallel with the center of piston rod, and two oil inlet and outlets are arranged on the bar head of piston rod; Two oil inlet and outlets respectively connect a pipeline, and wherein a pipeline connects the pressure retaining valve oil-collecting hole, and another oil-collecting hole of pressure retaining valve is connected with another pipeline; The radial position of this pipeline connects oil pipe, and the vertical spool of pipeline connects pressure retaining valve.
Said structure is that hydraulic jack connects the externally connected type pressure retaining valve, and the pipeline tie point is more, is easy to generate the leakage of oil point; And the externally connected type pressure retaining valve need occupy exceptional space; Be unfavorable for the miniaturization of hydraulic jack, and valve body one end that the pressurize spool is installed is blind hole, dismounting difficulty during maintenance.
Summary of the invention
The utility model has overcome defective of the prior art, and a kind of thin cylinder that has the plug-in type pressure retaining valve is provided, the compact structure of this oil cylinder, and rationally distributed, easy disassembly is quick on the draw, and is safe.
In order to solve the problems of the technologies described above, the utility model is realized through following technological scheme:
A kind of thin cylinder that has the plug-in type pressure retaining valve; Comprise cylinder body, piston and piston rod, cylinder body is provided with the piston cavity of an end opening, and piston is fixed in an end of piston rod; Piston rod and piston slide along cylinder body in piston cavity; The cylinder body opening end is connected with annular protecgulum, and piston rod passes protecgulum and is slidingly connected with protecgulum
Cylinder body is provided with the valve body chamber away from opening end; The valve body chamber is plugged with the plug-in type pressure retaining valve; Side of cylinder block offers first hydraulic fluid port and second hydraulic fluid port, and first hydraulic fluid port is communicated with first cavity that protecgulum, cylinder body and piston constitute, and first hydraulic fluid port is connected with pressure retaining valve through first oil circuit that is opened in the cylinder body; Second hydraulic fluid port is communicated with second cavity that cylinder body and piston are formed through second oil circuit that is opened in the cylinder body, and pressure retaining valve is arranged between second hydraulic fluid port and second cavity of second oil circuit.
Further, pressure retaining valve is a Pilot operated check valve.
Further, be provided with dust-proof seal ring between protecgulum and the piston rod, dust-proof seal ring is embedded in the protecgulum inboard and touches with piston rod.
Further, be provided with the rod seal circle between protecgulum and the piston rod, piston packing is embedded in the protecgulum inboard and touches with piston rod.
Further, the end that piston rod connects piston is provided with piston rod head, and piston is fixedly sleeved in piston rod head.
Further, be provided with the piston inner seal ring between piston rod head and the piston, the piston inner seal ring is embedded in piston rod head and touches with the piston madial wall.
Further, be provided with piston packing between the inwall of piston and cylinder body, piston packing is embedded in piston and touches with the inwall of cylinder body.
Further, be provided with the protecgulum seal ring between protecgulum and the inboard wall of cylinder block, the protecgulum seal ring is embedded in protecgulum and touches with the inwall of cylinder body.
The beneficial effect of the utility model is:
Compared with prior art, the utlity model has following characteristics:
(1) because pressure retaining valve is to be plugged in the cylinder body, and oil circuit is opened in cylinder interior, and the pipeline tie point is less, and leak-down rate is lower;
(2) oil circuit is shorter relatively, acts on more directly, and reflection is sensitiveer;
(3) make hydraulic cylinder piston be locked at the terminal point of stroke, prevent that weight from falling to also preventing that because of deadweight external load from changing piston and moving, and realizes the locking of oil hydraulic cylinder one end;
(4) location is clear can not adorn wrong hydraulic fluid port, and convenient the adjusting controlled;
(5) pressure retaining valve is plugged in cylinder body, oil circuit is opened in the cylinder body, and is rationally distributed, makes hydraulic jack compact overall structure, beautiful shape.
Description of drawings
Accompanying drawing is used to provide the further understanding to the utility model, is used to explain the utility model with the embodiment of the utility model, does not constitute the restriction to the utility model, in the accompanying drawings:
Fig. 1 is a kind of side view that has the thin cylinder of plug-in type pressure retaining valve.
Fig. 2 is the cross-sectional view at A-A place among Fig. 1.
Fig. 3 is a kind of plan view that has the thin cylinder of plug-in type pressure retaining valve
Include among Fig. 1 to Fig. 3 with lower component:
1---protecgulum, 11-protecgulum seal ring,
2---piston rod, 21---dust-proof seal ring, 22---rod seal circle, 23---piston rod head, 24---piston inner seal ring,
3---piston, 31---piston packing,
4---cylinder body, 41---first hydraulic fluid port, 42---second hydraulic fluid port, 43---first oil circuit, 44---second oil circuit, 45---valve body chamber, 46---piston cavity,
5---pressure retaining valve.
Embodiment
Describe below in conjunction with the preferred embodiment of accompanying drawing, should be appreciated that preferred embodiment described herein only is used for explanation and explains the utility model, and be not used in qualification the utility model the utility model.
Embodiment 1:
Described a kind of thin cylinder that has plug-in type pressure retaining valve 5 of the utility model to shown in Figure 3, comprises cylinder body 4, piston 3 and piston rod 2 like Fig. 1; Cylinder body 4 is provided with the piston cavity 46 of an end opening; Piston 3 is fixed in an end of piston rod 2, and piston rod 2 slides along cylinder body 4 in piston cavity 46 with piston 3, and cylinder body 4 opening ends are connected with annular protecgulum 1; Piston rod 2 passes protecgulum 1 and is slidingly connected with protecgulum 1; Cylinder body 4 is provided with valve body chamber 45 away from opening end, and valve body chamber 45 is plugged with plug-in type pressure retaining valve 5, and cylinder body 4 sides offer first hydraulic fluid port 41 and second hydraulic fluid port 42; First hydraulic fluid port 41 is communicated with first cavity that protecgulum 1, cylinder body 4 and piston 3 constitute; First hydraulic fluid port 41 is connected with pressure retaining valve 5 through first oil circuit 43 that is opened in the cylinder body 4, and second hydraulic fluid port 42 is communicated with second cavity that cylinder body 4 and piston 3 are formed through second oil circuit 44 that is opened in the cylinder body 4, and pressure retaining valve 5 is arranged between second hydraulic fluid port 42 and second cavity of second oil circuit 44.
Concrete, pressure retaining valve 5 is a Pilot operated check valve.Pilot operated check valve is also claimed blocking-valve, and it is identical with one-way valve, in order to prevent the hydraulic oil reverse flow.But the pressure of control hydraulic oil capable of using is again opened Pilot operated check valve when in oil hydraulic circuit, needing the hydraulic oil reverse flow, and hydraulic oil all can be flowed at both direction.Pilot operated check valve adopts taper valve core, so good seal performance.When requiring closing oil path, available this valve is as the one-way locking of oil circuit and play the pressurize effect.The leakage way of Pilot operated check valve control hydraulic oil has internal drainage type and leaks two kinds of formulas.Oppositely export available internal drainage type in the oil circuit of no back pressure at hydraulic oil; Otherwise need with the formula of leaking, to reduce the pressure of control hydraulic oil.
Be provided with dust-proof seal ring 21 between protecgulum 1 and the piston rod 2, dust-proof seal ring 21 is embedded in protecgulum 1 inboard and touches with piston rod 2.Because hydraulic jack is had relatively high expectations to turbidity test, if dust gets in hydraulic jack or the oil circuit, can influence the normal working life of oil cylinder, therefore dust-proof seal ring 21 is set, prevent foreign matter entering cylinder body 4 inside such as dust.
Be provided with rod seal circle 22 between protecgulum 1 and the piston rod 2, piston packing 31 is embedded in protecgulum 1 inboard and touches with piston rod 2.Prevent the hydraulic oil leakage.
The end that piston rod 2 connects piston 3 is provided with piston rod head 23, and piston 3 is fixedly sleeved in piston rod head 23.
Be provided with piston inner seal ring 24 between piston rod head 23 and the piston 3, piston inner seal ring 24 is embedded in piston rod head 23 and touches with piston 3 madial walls.Prevent that hydraulic oil from passing through the joint leakage of piston 3 and piston rod head 23.
Be provided with piston packing 31 between the inwall of piston 3 and cylinder body 4, piston packing 31 is embedded in piston 3 and touches with the inwall of cylinder body 4.Prevent that the hydraulic oil in first cavity and second cavity from flowing mutually.
Be provided with protecgulum seal ring 11 between the inwall of protecgulum 1 and cylinder body 4, protecgulum seal ring 11 is embedded in protecgulum 1, and touches with the inwall of cylinder body 4.Prevent the hydraulic oil leakage.
The technical requirements of hydraulic jack assembling: need to clean before the hydraulic jack assembling, burr is removed clean; Pressure testing more than five times is carried out in hydraulic jack assembling oil sealing position under 170 kilograms of pressure effects, anomalies such as shockproof, noise free, and in pressurize no oil impregnate phenomenon more than 5 minutes; Paint smooth in appearance zero defect.
Because pressure retaining valve 5 is to be plugged in the cylinder body, and oil circuit is opened in cylinder body 4 inside, and the pipeline tie point is less, and leak-down rate is lower;
Oil circuit is shorter relatively, acts on more directly, and reflection is sensitiveer;
Make the piston 3 of hydraulic jack be locked at the terminal point of stroke, prevent that weight from falling to also preventing that because of deadweight external load from changing that piston 3 is moved, and realizes the locking of hydraulic jack one end;
The location is clear can not adorn wrong hydraulic fluid port, and convenient the adjusting controlled;
What should explain at last is: more than be merely the preferred embodiment of the utility model; Be not limited to the utility model; Although the utility model has been carried out detailed explanation with reference to embodiment; For a person skilled in the art, it still can be made amendment to the technological scheme that aforementioned each embodiment put down in writing, and perhaps part technical characteristics wherein is equal to replacement.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.
Claims (8)
1. thin cylinder that has the plug-in type pressure retaining valve; Comprise cylinder body, piston and piston rod, said cylinder body is provided with the piston cavity of an end opening, and said piston is fixed in an end of said piston rod; Said piston rod and said piston slide along cylinder body in said piston cavity; Said cylinder body opening end is connected with annular protecgulum, and said piston rod passes said protecgulum and is slidingly connected with said protecgulum, it is characterized in that:
Said cylinder body is provided with the valve body chamber away from opening end; Said valve body chamber is plugged with the plug-in type pressure retaining valve; Said side of cylinder block offers first hydraulic fluid port and second hydraulic fluid port; Said first hydraulic fluid port is communicated with first cavity that said protecgulum, cylinder body and piston constitute; Said first hydraulic fluid port is connected with said pressure retaining valve through first oil circuit that is opened in the cylinder body, and said second hydraulic fluid port is communicated with second cavity that said cylinder body and said piston are formed through second oil circuit that is opened in the said cylinder body, and said pressure retaining valve is arranged between second hydraulic fluid port and second cavity of second oil circuit.
2. a kind of thin cylinder that has the plug-in type pressure retaining valve according to claim 1 is characterized in that: said pressure retaining valve is a Pilot operated check valve.
3. a kind of thin cylinder that has the plug-in type pressure retaining valve according to claim 1 is characterized in that: be provided with dust-proof seal ring between said protecgulum and the said piston rod, said dust-proof seal ring is embedded in said protecgulum inboard and touches with said piston rod.
4. a kind of thin cylinder that has the plug-in type pressure retaining valve according to claim 3 is characterized in that: be provided with the rod seal circle between said protecgulum and the said piston rod, said piston packing is embedded in said protecgulum inboard and touches with said piston rod.
5. a kind of thin cylinder that has the plug-in type pressure retaining valve according to claim 1 is characterized in that: the end that said piston rod connects piston is provided with piston rod head, and said piston is fixedly sleeved in said piston rod head.
6. a kind of thin cylinder that has the plug-in type pressure retaining valve according to claim 5; It is characterized in that: be provided with the piston inner seal ring between said piston rod head and the said piston, said piston inner seal ring is embedded in said piston rod head and touches with said piston madial wall.
7. a kind of thin cylinder that has the plug-in type pressure retaining valve according to claim 1 is characterized in that: be provided with piston packing between the inwall of said piston and cylinder body, said piston packing is embedded in said piston and touches with the inwall of said cylinder body.
8. a kind of thin cylinder that has the plug-in type pressure retaining valve according to claim 1 is characterized in that: be provided with the protecgulum seal ring between said protecgulum and the said inboard wall of cylinder block, said protecgulum seal ring is embedded in said protecgulum and touches with the inwall of said cylinder body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201347824U CN202560682U (en) | 2012-04-01 | 2012-04-01 | Thin hydraulic cylinder with plug-in type pressure retaining valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201347824U CN202560682U (en) | 2012-04-01 | 2012-04-01 | Thin hydraulic cylinder with plug-in type pressure retaining valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202560682U true CN202560682U (en) | 2012-11-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201347824U Expired - Fee Related CN202560682U (en) | 2012-04-01 | 2012-04-01 | Thin hydraulic cylinder with plug-in type pressure retaining valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202560682U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194893A (en) * | 2016-08-30 | 2016-12-07 | 缙云县博新机械有限公司 | A kind of hydraulic tensioning one oil cylinder |
| CN108533569A (en) * | 2018-06-28 | 2018-09-14 | 玉环广越机械有限公司 | A kind of angling cylinder with pressure holding function |
-
2012
- 2012-04-01 CN CN2012201347824U patent/CN202560682U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106194893A (en) * | 2016-08-30 | 2016-12-07 | 缙云县博新机械有限公司 | A kind of hydraulic tensioning one oil cylinder |
| CN108533569A (en) * | 2018-06-28 | 2018-09-14 | 玉环广越机械有限公司 | A kind of angling cylinder with pressure holding function |
| CN108533569B (en) * | 2018-06-28 | 2023-11-14 | 玉环广越机械有限公司 | Rotary oil cylinder with pressure maintaining function |
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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 |
Granted publication date: 20121128 Termination date: 20150401 |
|
| EXPY | Termination of patent right or utility model |