CN204186667U - Split type pressure-compensated valve - Google Patents
Split type pressure-compensated valve Download PDFInfo
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- CN204186667U CN204186667U CN201420598926.0U CN201420598926U CN204186667U CN 204186667 U CN204186667 U CN 204186667U CN 201420598926 U CN201420598926 U CN 201420598926U CN 204186667 U CN204186667 U CN 204186667U
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Abstract
The utility model relates to a kind of split type pressure-compensated valve, comprise valve body and be arranged on the valve pocket on valve body, valve pocket has the first endoporus, piston and elastic element is provided with in first endoporus, elastic element is built in the cross section effect with piston in the pressure chamber that formed between piston and valve pocket, piston shaft is to having through hole, in through hole, middle part is provided with the closing in the conical surface, the steel ball can blocking closing in is provided with in through hole, steel ball connects blocking-up and sets up oil-feed cavity volume and LS runner, piston radial also has the first radial hole, first radial hole one end is communicated with through hole, valve body has the second endoporus, slidably spool is provided with in second endoporus, spool connects blocking-up and sets up oil-feed cavity volume and fuel-displaced cavity volume, the utility model not only possesses the effect of safety check, also possesses the effect changing pressure compensation characteristic, and, pressure-compensated valve of the present utility model also integrates LS one-way valve, decrease additional shuttle valve member, cost is lower, finished product is compacter.
Description
Technical field
The utility model relates to a kind of hydrovalve, particularly relates to a kind of split type pressure-compensated valve.
Background technique
Pressure-compensated valve in engineering machinery field application widely, for excavator, it comprises swing arm, dipper, scraper bowl, bulldoze, the elemental motions such as revolution and complete machine walking, but in order to improve operating efficiency in actual conditions, often need the multiple working of aforementioned several elemental motion, the flow provided by oil hydraulic pump provides high pressure oil by hydraulicdirectional control valve to multiple executive component, when the peak rate of flow that oil hydraulic pump provides is less than the total discharge required for system, hydraulic oil can preferential flow to the lower executive component of induced pressure, and the higher executive component of induced pressure can underspeed or out of service.The basic liquid hydraulic circuit addressed this problem is all increase pressure-compensated valve after hydraulicdirectional control valve, the highest load pressure of executive component is detected by it, and the highest load pressure detected is delivered to all pressure-compensated valves by shuttle valve, the pressure that hydraulicdirectional control valve is exported equals system highest load pressure all substantially, and the inlet pressure of hydraulicdirectional control valve all equals hydraulic pump outlet pressure, then hydraulicdirectional control valve inlet outlet pressure differential all approximately equals of each executive component passage, thus realize when oil hydraulic pump underfed, the demand volume of each executive component distributes according to the valve port area ratio of its hydraulicdirectional control valve.
A kind of pressure-compensated valve disclosed in Chinese utility model patent CN1159849A, it comprises a valve, can set up and block an import and export between a kind of connected relation; One pressure chamber; One piston, is driven by the load pressure within described cavity volume and pass valve on blocking-up direction; One intermediate pressure cavity volume, be communicated in import via one first conduit and by pressure wherein in blocking-up side upwardly described valve; And a changeable pressure formula reduction valve, for a kind of pressure fluid among described intermediate pressure cavity being released into one second conduit via one second conduit.Chinese utility model patent CN203627369U discloses a kind of pressure-compensated valve, comprise valve body, be fixedly mounted on the valve pocket of valve body, in the valve opening being arranged on valve body and slidably spool, described valve pocket and spool are provided with piston and Returnning spring successively, described piston is placed on valve pocket endoporus, described Returnning spring is built in the pressure chamber that formed between piston and valve pocket, one flows to LS runner only one-way valve with one direction is placed with a cross-section end surfaces effect of piston at the oil-feed cavity volume of valve body, described spool connection establishment and blocking-up oil-feed cavity volume and fuel-displaced cavity volume, but, these pressure-compensated valves also need other element such as shuttle valve or one-way valve etc. to select the highest induced pressure when detecting induced pressure, which not only adds element number, making to install valve block amasss bigger than normal, also correspondingly certain cost is added.
Model utility content
The technical problems to be solved in the utility model is: in order to solve the problem, and the utility model provides a kind of split type pressure-compensated valve to solve the problems referred to above.
The utility model solves the technological scheme that its technical problem adopts: a kind of split type pressure-compensated valve, comprise valve body and be arranged on the valve pocket on valve body, described valve pocket has the first endoporus, piston and elastic element is provided with in the first described endoporus, described elastic element is built in the cross section effect with piston in the pressure chamber that formed between piston and valve pocket, described piston shaft is to having through hole, in described through hole, middle part is provided with the closing in the conical surface, the steel ball can blocking closing in is provided with in described through hole, described steel ball connects blocking-up and sets up oil-feed cavity volume and LS runner, namely the effect of shuttle valve is equivalent to, for selecting highest load pressure Pls exactly, described piston radial also has the first radial hole, first described radial hole one end is communicated with through hole, described valve body has the second endoporus, slidably spool is provided with in the second described endoporus, described spool connects blocking-up and sets up oil-feed cavity volume and fuel-displaced cavity volume.
Described spool has spool upper-end surface and spool lower end surface and the cross-section area of spool upper-end surface and spool lower end surface is equal, and described piston has piston upper-end surface and piston lower surface and the cross-section area of piston upper-end surface and piston lower surface is equal.
Highest load pressure Pls in described pressure chamber and elastic element act on described piston upper-end surface, and driven plunger slide downward, and described spool is passed on the direction that blocking-up oil-feed cavity volume is communicated with fuel-displaced cavity volume.
Described spool one end is the round column structure slided as guiding valve, and cylindrical section has the second radial hole for setting up and blocking being communicated with of oil-feed cavity volume and fuel-displaced cavity volume; Its other end is provided with conical surface sealing structure.
The below of described fuel-displaced cavity volume is provided with the conical surface valve seat mated with described conical surface sealing structure, fuel-displaced cavity volume is simultaneously on apply piston lower end surface and spool upper-end surface, when the pressure of fuel-displaced cavity volume is less than highest load pressure Pls and the pressure of the pressure ratio oil-feed cavity volume of fuel-displaced cavity volume is large, the pressure of fuel-displaced cavity volume promotes spool and moves downward, the conical surface sealing structure of spool is close on the conical surface valve seat of valve body, forms safety check.
When the pressure of fuel-displaced cavity volume is greater than highest load pressure Pls and oil-feed chamber pressure a little more than highest load pressure Pls time, the pressure of described fuel-displaced cavity volume promotes piston upwards, steel ball also moves upward, oil-feed cavity volume and LS flow passage, until the pressure of oil-feed cavity volume is greater than or equal to the pressure of fuel-displaced cavity volume, spool is opened, oil-feed cavity volume and fuel-displaced cavity volume conducting.
When fuel-displaced chamber pressure is less than highest load pressure Pls and oil-feed chamber pressure slightly larger than or when equaling highest load pressure Pls, spool moves up together with piston, oil-feed cavity volume is communicated with fuel-displaced cavity volume.
One end of the close elastic element of described piston is also provided with screw plug, and the oral area of described screw plug and the through hole of piston is connected.
The beneficial effects of the utility model are, the split type pressure-compensated valve of the utility model not only possesses the effect of safety check, also possesses the effect changing pressure compensation characteristic, namely can by changing the sectional area of the upper-end surface of piston, if increase its sectional area, upwardly the power of piston will increase, and then oil-feed cavity volume just can be made when making oil-feed chamber pressure become larger to be communicated with fuel-displaced cavity volume; Otherwise reduce its sectional area, just can be communicated with oil-feed cavity volume and fuel-displaced cavity volume when oil-feed chamber pressure can be made less, pressurized liquid becomes and more easily flows, and pressure-compensated valve of the present utility model also integrates LS one-way valve, decrease additional shuttle valve member, cost is lower, and finished product is compacter.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the structural representation of the optimum embodiment of the split type pressure-compensated valve of the utility model.
1-1-1, valve body in figure, 1-1-2, valve pocket, 1-1-3, spring, 1-1-4, piston, 1-1-5, steel ball, 1-1-6, screw plug, 1-1-7, spool, 1-1-R1, oil-feed cavity volume, 1-1-R2, fuel-displaced cavity volume, 1-1-K1, the second radial hole, 1-1-K2, through hole, 1-1-K3, the first radial hole, 1-1-T1, the first endoporus, 1-1-T2, the second endoporus, 1-1-A1, spool lower end surface, 1-1-A2, spool upper-end surface, 1-1-A3, piston lower surface, 1-1-A4, piston upper-end surface, 1-1-Z1, conical surface valve seat, 1-1-Z2, closing in.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, only basic structure of the present utility model are described in a schematic way, and therefore it only shows the formation relevant with the utility model.
As shown in Figure 1, the split type pressure-compensated valve of the utility model, comprise valve body 1-1-1 and be arranged on the valve pocket 1-1-2 on valve body 1-1-1, valve pocket 1-1-2 has the first endoporus 1-1-T1, piston 1-1-4 and elastic element is provided with in first endoporus 1-1-T1, elastic element is built in the cross section effect with piston 1-1-4 in the pressure chamber that formed between piston 1-1-4 and valve pocket 1-1-2, piston 1-1-4 axially has through hole 1-1-K2, in through hole 1-1-K2, middle part is provided with the closing in 1-1-Z2 in the conical surface, the steel ball 1-1-5 that can block closing in is provided with in through hole 1-1-K2, steel ball 1-1-5 connects blocking-up and sets up oil-feed cavity volume 1-1-R1 and LS runner, namely the effect of shuttle valve is equivalent to, for selecting highest load pressure Pls exactly, piston 1-1-4 radial direction also has the first radial hole 1-1-K3, first radial hole 1-1-K3 one end is communicated with through hole 1-1-K2, described valve body 1-1-1 has the second endoporus 1-1-T2, slidably spool 1-1-7 is provided with in second endoporus 1-1-T2, spool 1-1-7 connects blocking-up and sets up oil-feed cavity volume 1-1-R1 and fuel-displaced cavity volume 1-1-R2.
Spool 1-1-7 has spool upper-end surface 1-1-A2 and spool lower end surface 1-1-A1 and the cross-section area of spool upper-end surface 1-1-A2 and spool lower end surface 1-1-A1 is equal, piston 1-1-4 has piston upper-end surface 1-1-A4 and piston lower surface 1-1-A3 and the cross-section area of piston upper-end surface 1-1-A4 and piston lower surface 1-1-A3 is equal, highest load pressure Pls in pressure chamber and elastic element act on described piston upper-end surface 1-1-A4, and driven plunger 1-1-4 slide downward, and described spool 1-1-7 is passed on the direction that blocking-up oil-feed cavity volume 1-1-R1 is communicated with fuel-displaced cavity volume 1-1-R2, spool 1-1-7 one end is the round column structure slided as guiding valve, cylindrical section has the second radial hole 1-1-K1 for setting up and blocking being communicated with of oil-feed cavity volume 1-1-R1 and fuel-displaced cavity volume 1-1-R2, its the other end is provided with conical surface sealing structure.
The below of fuel-displaced cavity volume 1-1-R2 is provided with the conical surface valve seat 1-1-Z1 mated with conical surface sealing structure, fuel-displaced cavity volume 1-1-R2 is simultaneously on apply piston 1-1-4 lower end surface 1-1-A3 and spool 1-1-7 upper-end surface, when the pressure of fuel-displaced cavity volume 1-1-R2 is less than highest load pressure Pls and the pressure of the pressure ratio oil-feed cavity volume 1-1-R1 of fuel-displaced cavity volume 1-1-R2 is large, the pressure of fuel-displaced cavity volume 1-1-R2 promotes spool 1-1-7 and moves downward, the conical surface sealing structure of spool 1-1-7 is close on the conical surface valve seat 1-1-Z1 of valve body, forms safety check.
When the pressure of fuel-displaced cavity volume 1-1-R2 is greater than highest load pressure Pls and oil-feed cavity volume 1-1-R1 pressure a little more than highest load pressure Pls time, the pressure of fuel-displaced cavity volume 1-1-R2 promotes piston 1-1-4 and moves upward, steel ball 1-1-5 also moves upward, oil-feed cavity volume 1-1-R1 and LS flow passage, oil-feed cavity volume 1-1-R1 pressure continues to raise, until the pressure of oil-feed cavity volume 1-1-R1 is greater than or equal to the pressure of fuel-displaced cavity volume 1-1-R2, spool 1-1-7 opens, oil-feed cavity volume 1-1-R1 and fuel-displaced cavity volume 1-1-R2 conducting, highest load pressure P
lS, namely choose now higher oil-feed cavity volume 1-1-R1 pressure P 1.
When fuel-displaced cavity volume 1-1-R2 pressure is less than highest load pressure Pls and oil-feed cavity volume 1-1-R1 pressure slightly larger than or when equaling highest load pressure Pls, spool 1-1-7 moves up together with piston 1-1-4, oil-feed cavity volume 1-1-R1 is communicated with fuel-displaced cavity volume 1-1-R2, highest load pressure P
lSconstant.
One end of the close elastic element of piston 1-1-4 is also provided with screw plug 1-1-6, and the oral area of the through hole 1-1-K2 of screw plug 1-1-6 and piston 1-1-4 is connected.
With above-mentioned according to desirable embodiment of the present utility model for enlightenment, by above-mentioned description, relevant staff in the scope not departing from this model utility technological thought, can carry out various change and amendment completely.The technical scope of this model utility is not limited to the content on specification, must determine its technical scope according to right.
Claims (8)
1. a split type pressure-compensated valve, it is characterized in that: comprise valve body (1-1-1) and be arranged on the valve pocket (1-1-2) on valve body (1-1-1), described valve pocket (1-1-2) has the first endoporus (1-1-T1), piston (1-1-4) and elastic element is provided with in described the first endoporus (1-1-T1), described elastic element is built in the cross section effect with piston (1-1-4) in the pressure chamber that formed between piston (1-1-4) and valve pocket (1-1-2), described piston (1-1-4) axially has through hole (1-1-K2), in described through hole (1-1-K2), middle part is provided with the closing in the conical surface, the steel ball (1-1-5) can blocking closing in is provided with in described through hole (1-1-K2), described steel ball (1-1-5) connects blocking-up and sets up oil-feed cavity volume (1-1-R1) and LS runner, namely the effect of shuttle valve is equivalent to, for selecting highest load pressure Pls exactly, described piston (1-1-4) radial direction also has the first radial hole (1-1-K3), described the first radial hole (1-1-K3) one end is communicated with through hole (1-1-K2), described valve body (1-1-1) has the second endoporus (1-1-T2), slidably spool (1-1-7) is provided with in described the second endoporus (1-1-T2), described spool (1-1-7) connects blocking-up and sets up oil-feed cavity volume (1-1-R1) and fuel-displaced cavity volume (1-1-R2).
2. split type pressure-compensated valve according to claim 1, it is characterized in that: described spool (1-1-7) has spool upper-end surface (1-1-A2) and spool lower end surface (1-1-A1) and the cross-section area of spool upper-end surface (1-1-A2) and spool lower end surface (1-1-A1) is equal, described piston (1-1-4) has piston upper-end surface (1-1-A4) and piston lower surface (1-1-A3) and the cross-section area of piston upper-end surface (1-1-A4) and piston lower surface (1-1-A3) is equal.
3. split type pressure-compensated valve according to claim 2, it is characterized in that: the highest load pressure Pls in described pressure chamber and elastic element act on the upper-end surface (1-1-A4) of described piston (1-1-4), and driven plunger (1-1-4) slide downward, and pass described spool (1-1-7) on the direction that blocking-up oil-feed cavity volume (1-1-R1) is communicated with fuel-displaced cavity volume (1-1-R2).
4. split type pressure-compensated valve according to claim 3, it is characterized in that: described spool (1-1-7) one end is the round column structure slided as guiding valve, cylindrical section has the second radial hole (1-1-K1) for setting up and blocking being communicated with of oil-feed cavity volume and fuel-displaced cavity volume (1-1-R2); Its other end is provided with conical surface sealing structure.
5. split type pressure-compensated valve according to claim 4, it is characterized in that: the below of described fuel-displaced cavity volume (1-1-R2) is provided with the conical surface valve seat (1-1-Z1) mated with described conical surface sealing structure, the while of fuel-displaced cavity volume (1-1-R2) on apply piston lower end surface (1-1-A3) and spool upper-end surface (1-1-A2), when the pressure of fuel-displaced cavity volume (1-1-R2) is less than highest load pressure Pls and the pressure of the pressure ratio oil-feed cavity volume (1-1-R1) of fuel-displaced cavity volume (1-1-R2) is large, the pressure of fuel-displaced cavity volume (1-1-R2) promotes spool (1-1-7) and moves downward, the conical surface sealing structure of spool (1-1-7) is close on the conical surface valve seat (1-1-Z1) of valve body, form safety check.
6. split type pressure-compensated valve according to claim 5, it is characterized in that: when the pressure of fuel-displaced cavity volume (1-1-R2) is greater than highest load pressure Pls and oil-feed cavity volume (1-1-R1) pressure a little more than highest load pressure Pls time, the pressure of described fuel-displaced cavity volume (1-1-R2) promotes piston (1-1-4) and moves upward, steel ball (1-1-5) also moves upward, oil-feed cavity volume (1-1-R1) and LS flow passage, until the pressure of oil-feed cavity volume (1-1-R1) is greater than or equal to the pressure of fuel-displaced cavity volume (1-1-R2), spool (1-1-7) is opened, oil-feed cavity volume (1-1-R1) and fuel-displaced cavity volume (1-1-R2) conducting.
7. split type pressure-compensated valve according to claim 6, it is characterized in that: when fuel-displaced cavity volume (1-1-R2) pressure is less than highest load pressure Pls and oil-feed cavity volume (1-1-R1) pressure slightly larger than or equal highest load pressure Pls time, spool (1-1-7) and piston (1-1-4) move up together, and oil-feed cavity volume (1-1-R1) is communicated with fuel-displaced cavity volume (1-1-R2).
8. split type pressure-compensated valve according to claim 7, it is characterized in that: one end of the close elastic element of described piston (1-1-4) is also provided with screw plug (1-1-6), described screw plug (1-1-6) is connected with the oral area of the through hole (1-1-K2) of piston (1-1-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420598926.0U CN204186667U (en) | 2014-10-16 | 2014-10-16 | Split type pressure-compensated valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420598926.0U CN204186667U (en) | 2014-10-16 | 2014-10-16 | Split type pressure-compensated valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204186667U true CN204186667U (en) | 2015-03-04 |
Family
ID=52618676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420598926.0U Active CN204186667U (en) | 2014-10-16 | 2014-10-16 | Split type pressure-compensated valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204186667U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295549A (en) * | 2014-10-16 | 2015-01-21 | 江苏恒立液压有限公司 | Split type pressure compensation valve |
| US9903396B2 (en) | 2016-03-08 | 2018-02-27 | Caterpillar Inc. | Valve assembly |
| CN109917465A (en) * | 2018-11-30 | 2019-06-21 | 陕西迈拓克能源科技有限公司 | A kind of magnetometer probe frame |
-
2014
- 2014-10-16 CN CN201420598926.0U patent/CN204186667U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295549A (en) * | 2014-10-16 | 2015-01-21 | 江苏恒立液压有限公司 | Split type pressure compensation valve |
| US9903396B2 (en) | 2016-03-08 | 2018-02-27 | Caterpillar Inc. | Valve assembly |
| CN109917465A (en) * | 2018-11-30 | 2019-06-21 | 陕西迈拓克能源科技有限公司 | A kind of magnetometer probe frame |
| CN109917465B (en) * | 2018-11-30 | 2024-04-12 | 河南省地质物探测绘技术有限公司 | Magnetometer probe frame |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 213167 Wujin high tech Industrial Development Zone, Jiangsu Province, No. long hidden Road, No. 99 Patentee after: JIANGSU HENGLI HYDRAULIC CO., LTD. Address before: 213167, No. 99, long hidden Road, Wujin hi tech Industrial Development Zone, Changzhou, Jiangsu, Changzhou Patentee before: JIANGSU HENGLI HYDRAULIC CO., LTD. |