CN204186666U - A kind of plug-in type load holding valve and hydraulic load retentive control system - Google Patents
A kind of plug-in type load holding valve and hydraulic load retentive control system Download PDFInfo
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- CN204186666U CN204186666U CN201420596910.6U CN201420596910U CN204186666U CN 204186666 U CN204186666 U CN 204186666U CN 201420596910 U CN201420596910 U CN 201420596910U CN 204186666 U CN204186666 U CN 204186666U
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Abstract
The utility model discloses a kind of plug-in type load holding valve and hydraulic load retentive control system, comprise main valve housing, the load hydraulic fluid port be communicated with main valve housing endoporus is provided with in the front end of main valve housing, the screw plug of closed main valve housing endoporus is provided with in the rear end of main valve housing, main cone spool is disposed with from front to back in described main valve housing endoporus, pilot poppet valve core and push rod, described main cone spool, push rod and the slipper seal of main valve housing endoporus, spring is provided with between described pilot poppet valve core and main cone spool, the corresponding pilot poppet valve core of described main valve housing endoporus is provided with sealing seat, slipper seal between described pilot poppet valve core and sealing seat.The utility model adds the system reliability of valve, avoids the generation of security incident; Improve operating steadily of valve, and the control accuracy of pilot pressure.
Description
Technical field
The utility model relates to valve.
Background technique
Load holding valve in the market, Pilot operated check valve and equilibrium valve is mostly selected to keep as load, hydraulic lock and equilibrium valve can use as blocking element in certain occasion, can ensure that equipment will wait external cause to occur gliding, exceeding the speed limit or vibration because of deadweight, be widely used in the bearing system with engineering machinery.
The complete loops that current use Pilot operated check valve keeps as load, this type systematic in use just deposits multiple deficiency and defect: because Pilot operated check valve generally only has out and closes two states, do not have intermediateness.Therefore should not be used for load may to decline too fast occasion.Because the too fast decline of load, can cause loading cylinders upper cavity pressure, also namely pilot pressure reduces and disappears, and result Pilot operated check valve is closed, and upper cavity pressure rises again, and Pilot operated check valve is opened once again, goes round and begins again, just can generation systems oscillatory surge
In addition, the complete loops using conventional equilibrium valve to keep as load also has many deficiencies, such as when the pressure versus flow of working connection is increased in fast when equilibrium valve is opened and can impacts the conventional pilot control build-up of pressure of equilibrium valve, this impact may cause equilibrium valve to be opened suddenly, thus cause the instability of equipment work, in addition also have the pilot pressure narrow range of equilibrium valve, pressure and flowed fluctuation large, equilibrium valve opening process micro-control and poor stability.
Model utility content
Technical problem to be solved in the utility model is just to provide a kind of plug-in type load holding valve and hydraulic load retentive control system, can meet load self-locking is kept under while key property, executive component can also be carried to band and carry out accurately sensitive control, and bringing onto load traveling comfort can be improved.
For solving the problems of the technologies described above, the utility model adopts following technological scheme: a kind of plug-in type load holding valve, comprise main valve housing, the load hydraulic fluid port be communicated with main valve housing endoporus is provided with in the front end of main valve housing, the screw plug of closed main valve housing endoporus is provided with in the rear end of main valve housing, main cone spool is disposed with from front to back in described main valve housing endoporus, pilot poppet valve core and push rod, described main cone spool, push rod and the slipper seal of main valve housing endoporus, spring is provided with between described pilot poppet valve core and main cone spool, the corresponding pilot poppet valve core of described main valve housing endoporus is provided with sealing seat, slipper seal between described pilot poppet valve core and sealing seat, described main cone spool and pilot poppet valve core, sealing seat and main valve housing endoporus surround pressure chamber, described sealing seat and pilot poppet valve core, push rod and main valve housing endoporus surround oil back chamber, described push rod, screw plug and main valve housing endoporus surround pilot chamber, the anterior corresponding main cone spool of described main valve housing is provided with filler opening, the corresponding oil back chamber of described main valve housing is provided with return opening, the corresponding pilot chamber of described main valve housing is provided with control port, described main cone spool is provided with the damping hole being communicated with load hydraulic fluid port and pressure chamber, described pilot poppet valve core is provided with throttle structure.
Preferably, described main cone spool comprises the tapered portion coordinated with load hydraulic fluid port, the first cylindrical portion is provided with on front side of described tapered portion, the second cylindrical portion is provided with on rear side of described tapered portion, three cylindrical portion is provided with on rear side of described second cylindrical portion, described three cylindrical portion and the slipper seal of main valve housing endoporus, the 4th cylindrical portion is provided with on rear side of described three cylindrical portion, described spring at front end is socketed in the 4th cylindrical portion, described first cylindrical portion diameter is less than the second cylindrical portion diameter, described second cylindrical portion diameter is less than three cylindrical portion diameter, described 4th cylindrical portion diameter is less than three cylindrical portion diameter.
Preferably, described damping hole comprises is located at main cone center spool and the axial blind hole closed of front end, is circumferentially with at least two radial direction through hole be communicated with axial blind hole in the first cylindrical portion.
Preferably, described pilot poppet valve core comprises the first anterior cylindrical part and the second cylindrical part of rear end, the external diameter of described first cylindrical part is greater than the external diameter of the second cylindrical part, the outer peripheral surface joint of described first cylindrical part and the second cylindrical part is conical surface transition, described second cylindrical part slipper seal is located in sealing seat endoporus, the rear end of described spring is installed on the first cylindrical part inside, and described push rod front end is provided with the protuberance being installed on the second cylindrical part inside.
Preferably, described sealing seat is provided with pilot poppet valve core conical surface transition place in boring the sealing lip sealed.
Preferably, described throttle structure is along some uniform throttling grooves of the second cylindrical part outer peripheral surface circumference.
Preferably, the horizontal cross-sectional area of described throttling groove is along throttling groove length linearly increase tendency from front to back.
Preferably, the degree of depth of described throttling groove is along throttling groove length from front to back in linear intensification trend.
Preferably, the width of described throttling groove widens trend in linear from front to back along throttling groove length.
In addition, the utility model additionally provides a kind of hydraulic load retentive control system, it comprises above-mentioned load holding valve and loading cylinders, selector valve, the rodless cavity of loading cylinders is connected with the load hydraulic fluid port of load holding valve, first actuator port of selector valve is connected with the rod chamber of loading cylinders, second actuator port of selector valve is connected with filler opening, the oil recirculating port connecting tank of load holding valve, and the rod chamber of loading cylinders is connected with the control port of load holding valve.
The utility model adopts technique scheme, and its beneficial effect is:
1, structure is simply easy to processing, and cost is low by 2, the system reliability that adds valve, avoids the generation of security incident; 3, operating steadily of valve is improved, and the control accuracy of pilot pressure.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is further described:
Fig. 1 is the structural representation of plug-in type load holding valve of the present utility model;
Fig. 2 is the schematic diagram of hydraulic load retentive control system.
Embodiment
As shown in Figure 1, a kind of plug-in type load holding valve, comprise main valve housing 1, the load hydraulic fluid port 1a be communicated with main valve housing endoporus is provided with in the front end of main valve housing, the screw plug 8 of closed main valve housing endoporus is provided with in the rear end of main valve housing, main valve housing rear end is installed on valve seat 9, main cone spool 2 is disposed with from front to back in described main valve housing endoporus, pilot poppet valve core 4 and push rod 7, described main cone spool, push rod and the slipper seal of main valve housing endoporus, spring 3 is provided with between described pilot poppet valve core and main cone spool, the corresponding pilot poppet valve core of described main valve housing endoporus is provided with sealing seat 5, main valve housing endoporus is provided with circlip for hole 6 on rear side of sealing seat, slipper seal between described pilot poppet valve core and sealing seat, described main cone spool and pilot poppet valve core, sealing seat and main valve housing endoporus surround pressure chamber A, described sealing seat and pilot poppet valve core, push rod and main valve housing endoporus surround oil back chamber B, described push rod, screw plug and main valve housing endoporus surround pilot chamber C, the anterior corresponding main cone spool of described main valve housing is provided with filler opening 1b, the corresponding oil back chamber of described main valve housing is provided with return opening 1c, the corresponding pilot chamber of described main valve housing is provided with control port 1d, described main cone spool is provided with the damping hole being communicated with load hydraulic fluid port and pressure chamber, described pilot poppet valve core is provided with throttle structure 10.
Concrete, described main cone spool comprises the tapered portion coordinated with load hydraulic fluid port, the first cylindrical portion is provided with on front side of described tapered portion, the second cylindrical portion is provided with on rear side of described tapered portion, three cylindrical portion is provided with on rear side of described second cylindrical portion, described three cylindrical portion and the slipper seal of main valve housing endoporus, the 4th cylindrical portion is provided with on rear side of described three cylindrical portion, described spring at front end is socketed in the 4th cylindrical portion, described first cylindrical portion diameter is less than the second cylindrical portion diameter, described second cylindrical portion diameter is less than three cylindrical portion diameter, described 4th cylindrical portion diameter is less than three cylindrical portion diameter.Described damping hole comprises is located at main cone center spool and the axial blind hole closed of front end, is circumferentially with at least two radial direction through hole be communicated with axial blind hole in the first cylindrical portion.
Described pilot poppet valve core comprises the first anterior cylindrical part and the second cylindrical part of rear end, the external diameter of described first cylindrical part is greater than the external diameter of the second cylindrical part, the outer peripheral surface joint of described first cylindrical part and the second cylindrical part is conical surface transition, described second cylindrical part slipper seal is located in sealing seat endoporus, the rear end of described spring is installed on the first cylindrical part inside, and described push rod front end is provided with the protuberance being installed on the second cylindrical part inside.Described sealing seat is provided with pilot poppet valve core conical surface transition place in boring the sealing lip sealed.
First, the sealing lip of sealing seat and the conical surface transition place of pilot poppet valve core form first paragraph and seal, cone sealing, then form second segment by the second cylindrical part outer peripheral surface of pilot poppet valve core and the endoporus of sealing seat and seal, cylndrical surface sealing.Like this, the sealing of pilot poppet valve core and valve seat, formed a kind of can the structure opened slowly of quick closing valve, ensure that spool is in the process opened, flow gain remains on a stable process.
Described throttle structure is along some uniform throttling grooves of the second cylindrical part outer peripheral surface circumference.The horizontal cross-sectional area of described throttling groove is along throttling groove length linearly increase tendency from front to back.The degree of depth of described throttling groove is along throttling groove length from front to back in linear intensification trend.The width of described throttling groove widens trend in linear from front to back along throttling groove length.
Concrete, throttling groove is processed with four, 90 degree, interval is arranged on the second cylindrical part outer peripheral surface, this throttling groove solves the problem of pilot poppet valve core bumpy motion, and because the horizontal cross-sectional area of throttling groove is along throttling groove length linearly increase tendency from front to back, further increase the stationarity of pilot poppet valve core motion.In the present embodiment, the radial cross section of throttling groove and axial cross section all triangular in shape.
As shown in Figure 2, a kind of hydraulic load retentive control system, comprise above-mentioned load holding valve and loading cylinders, selector valve, the rodless cavity of loading cylinders is connected with the load hydraulic fluid port of load holding valve, first actuator port of selector valve is connected with the rod chamber of loading cylinders, second actuator port of selector valve is connected with filler opening, the oil recirculating port connecting tank of load holding valve, and the rod chamber of loading cylinders is connected with the control port of load holding valve.
Pressure oil is full of pressure chamber A from the damping hole of main cone spool, because the differential area of spool is poor, main cone spool is applied on the conical surface, the pressure oil of pressure chamber A acts on pilot poppet valve core simultaneously, because pilot poppet valve core and sealing seat are conical surface seals, pilot poppet valve core is applied on the conical surface, ensure that zero leakage.
When load laid down by needs, hydraulic oil is passed into from control port, enter pilot chamber C, pressure oil acts on push rod, because pilot poppet valve core has throttling groove, when fluid control pressure exceedes pilot pressure, the pressure sum that pressure oil makes push rod overcome spring force and pressure chamber makes pilot poppet valve core move and open spool, this is that pressure oil in pressure chamber flows to oil back chamber B and lays down pressure oil sump tank through oil return aperture, because the fluid of pressure chamber A has flowing, main cone spool aperture two ends will mineralization pressure poor, main cone spool is opened.
Claims (10)
1. a plug-in type load holding valve, it is characterized in that: comprise main valve housing, the load hydraulic fluid port be communicated with main valve housing endoporus is provided with in the front end of main valve housing, the screw plug of closed main valve housing endoporus is provided with in the rear end of main valve housing, main cone spool is disposed with from front to back in described main valve housing endoporus, pilot poppet valve core and push rod, described main cone spool, push rod and the slipper seal of main valve housing endoporus, spring is provided with between described pilot poppet valve core and main cone spool, the corresponding pilot poppet valve core of described main valve housing endoporus is provided with sealing seat, slipper seal between described pilot poppet valve core and sealing seat, described main cone spool and pilot poppet valve core, sealing seat and main valve housing endoporus surround pressure chamber, described sealing seat and pilot poppet valve core, push rod and main valve housing endoporus surround oil back chamber, described push rod, screw plug and main valve housing endoporus surround pilot chamber, the anterior corresponding main cone spool of described main valve housing is provided with filler opening, the corresponding oil back chamber of described main valve housing is provided with return opening, the corresponding pilot chamber of described main valve housing is provided with control port, described main cone spool is provided with the damping hole being communicated with load hydraulic fluid port and pressure chamber, described pilot poppet valve core is provided with throttle structure.
2. a kind of plug-in type load holding valve according to claim 1, it is characterized in that: described main cone spool comprises the tapered portion coordinated with load hydraulic fluid port, the first cylindrical portion is provided with on front side of described tapered portion, the second cylindrical portion is provided with on rear side of described tapered portion, three cylindrical portion is provided with on rear side of described second cylindrical portion, described three cylindrical portion and the slipper seal of main valve housing endoporus, the 4th cylindrical portion is provided with on rear side of described three cylindrical portion, described spring at front end is socketed in the 4th cylindrical portion, described first cylindrical portion diameter is less than the second cylindrical portion diameter, described second cylindrical portion diameter is less than three cylindrical portion diameter, described 4th cylindrical portion diameter is less than three cylindrical portion diameter.
3. a kind of plug-in type load holding valve according to claim 2, it is characterized in that: described damping hole comprises is located at main cone center spool and the axial blind hole closed of front end, is circumferentially with at least two radial direction through hole be communicated with axial blind hole in the first cylindrical portion.
4. a kind of plug-in type load holding valve according to claims 1 to 3 any one, it is characterized in that: described pilot poppet valve core comprises the first anterior cylindrical part and the second cylindrical part of rear end, the external diameter of described first cylindrical part is greater than the external diameter of the second cylindrical part, the outer peripheral surface joint of described first cylindrical part and the second cylindrical part is conical surface transition, described second cylindrical part slipper seal is located in sealing seat endoporus, the rear end of described spring is installed on the first cylindrical part inside, and described push rod front end is provided with the protuberance being installed on the second cylindrical part inside.
5. a kind of plug-in type load holding valve according to claim 4, is characterized in that: described sealing seat is provided with pilot poppet valve core conical surface transition place in boring the sealing lip sealed.
6. a kind of plug-in type load holding valve according to claim 5, is characterized in that: described throttle structure is along some uniform throttling grooves of the second cylindrical part outer peripheral surface circumference.
7. a kind of plug-in type load holding valve according to claim 6, is characterized in that: the horizontal cross-sectional area of described throttling groove is along throttling groove length linearly increase tendency from front to back.
8. a kind of plug-in type load holding valve according to claim 7, is characterized in that: the degree of depth of described throttling groove is along throttling groove length from front to back in linear intensification trend.
9. a kind of plug-in type load holding valve according to claim 8, is characterized in that: the width of described throttling groove widens trend in linear from front to back along throttling groove length.
10. a hydraulic load retentive control system, it is characterized in that: the load holding valve and loading cylinders, the selector valve that comprise claim 1 to 9 any one, the rodless cavity of loading cylinders is connected with the load hydraulic fluid port of load holding valve, first actuator port of selector valve is connected with the rod chamber of loading cylinders, second actuator port of selector valve is connected with filler opening, the oil recirculating port connecting tank of load holding valve, the rod chamber of loading cylinders is connected with the control port of load holding valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420596910.6U CN204186666U (en) | 2014-10-15 | 2014-10-15 | A kind of plug-in type load holding valve and hydraulic load retentive control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420596910.6U CN204186666U (en) | 2014-10-15 | 2014-10-15 | A kind of plug-in type load holding valve and hydraulic load retentive control system |
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| CN204186666U true CN204186666U (en) | 2015-03-04 |
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| CN201420596910.6U Active CN204186666U (en) | 2014-10-15 | 2014-10-15 | A kind of plug-in type load holding valve and hydraulic load retentive control system |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641386A (en) * | 2016-11-24 | 2017-05-10 | 浙江华益精密机械股份有限公司 | Pressure compensation electric proportional seat valve |
| CN108980129A (en) * | 2018-07-24 | 2018-12-11 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of load holding control valve |
| CN109237056A (en) * | 2018-10-25 | 2019-01-18 | 太重集团榆次液压工业有限公司 | A kind of plug-in precompression valve |
| CN109826838A (en) * | 2019-02-27 | 2019-05-31 | 江苏徐工工程机械研究院有限公司 | A kind of load holding valve |
| CN110230618A (en) * | 2019-06-25 | 2019-09-13 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic control two way selected valve, load keep module and load holding system |
| CN110792650A (en) * | 2019-11-05 | 2020-02-14 | 武芳 | Threaded cartridge type load retaining valve |
| CN111720382A (en) * | 2020-06-30 | 2020-09-29 | 潍柴动力股份有限公司 | Load holding valve and hydraulic control system |
| CN112253558A (en) * | 2020-10-20 | 2021-01-22 | 浙江大学 | Load control valve integrating large-flow overflow function into main valve core |
| CN112253570A (en) * | 2020-10-20 | 2021-01-22 | 浙江大学 | Plug-in pilot high-flow load control valve |
| CN112855640A (en) * | 2019-11-27 | 2021-05-28 | 哈威液压股份公司 | Valve cone, load holding valve with valve cone and method for assembling check valve |
| CN112879365A (en) * | 2021-01-19 | 2021-06-01 | 龙工（上海）精工液压有限公司 | Load holding valve for excavator |
| CN113124012A (en) * | 2021-04-06 | 2021-07-16 | 中联重科股份有限公司 | Load holding valve and construction machine |
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2014
- 2014-10-15 CN CN201420596910.6U patent/CN204186666U/en active Active
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641386A (en) * | 2016-11-24 | 2017-05-10 | 浙江华益精密机械股份有限公司 | Pressure compensation electric proportional seat valve |
| CN108980129A (en) * | 2018-07-24 | 2018-12-11 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of load holding control valve |
| CN109237056A (en) * | 2018-10-25 | 2019-01-18 | 太重集团榆次液压工业有限公司 | A kind of plug-in precompression valve |
| CN109826838A (en) * | 2019-02-27 | 2019-05-31 | 江苏徐工工程机械研究院有限公司 | A kind of load holding valve |
| CN109826838B (en) * | 2019-02-27 | 2023-09-05 | 江苏徐工工程机械研究院有限公司 | Load holding valve |
| CN110230618A (en) * | 2019-06-25 | 2019-09-13 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic control two way selected valve, load keep module and load holding system |
| CN110230618B (en) * | 2019-06-25 | 2024-05-28 | 徐工集团工程机械股份有限公司科技分公司 | Hydraulic control two-way reversing valve, load holding module and load holding system |
| CN110792650B (en) * | 2019-11-05 | 2021-08-06 | 江苏军源装备制造有限公司 | Threaded cartridge type load retaining valve |
| CN110792650A (en) * | 2019-11-05 | 2020-02-14 | 武芳 | Threaded cartridge type load retaining valve |
| CN112855640A (en) * | 2019-11-27 | 2021-05-28 | 哈威液压股份公司 | Valve cone, load holding valve with valve cone and method for assembling check valve |
| CN112855640B (en) * | 2019-11-27 | 2023-04-18 | 哈威液压股份公司 | Valve cone, load holding valve with valve cone and method for assembling check valve |
| WO2022001032A1 (en) * | 2020-06-30 | 2022-01-06 | 潍柴动力股份有限公司 | Load holding valve and hydraulic control system |
| CN111720382A (en) * | 2020-06-30 | 2020-09-29 | 潍柴动力股份有限公司 | Load holding valve and hydraulic control system |
| CN112253570A (en) * | 2020-10-20 | 2021-01-22 | 浙江大学 | Plug-in pilot high-flow load control valve |
| CN112253558A (en) * | 2020-10-20 | 2021-01-22 | 浙江大学 | Load control valve integrating large-flow overflow function into main valve core |
| CN112253558B (en) * | 2020-10-20 | 2021-09-17 | 浙江大学 | Load control valve integrating large-flow overflow function into main valve core |
| CN112253570B (en) * | 2020-10-20 | 2021-09-17 | 浙江大学 | Plug-in pilot high-flow load control valve |
| CN112879365A (en) * | 2021-01-19 | 2021-06-01 | 龙工（上海）精工液压有限公司 | Load holding valve for excavator |
| CN113124012A (en) * | 2021-04-06 | 2021-07-16 | 中联重科股份有限公司 | Load holding valve and construction machine |
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| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG HUAYI PRECISION MACHINERY CO., LTD. Free format text: FORMER NAME: ZHEJIANG HUAYI MACHINERY CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: 311835, Shaoxing Town, Zhuji, Zhejiang, Jiefang Road No. 689 Patentee after: ZHEJIANG HUAYI PRECISION MACHINERY Co.,Ltd. Address before: 311835, Shaoxing Town, Zhuji, Zhejiang, Jiefang Road No. 689 Patentee before: ZHEJIANG HUAYI MACHINERY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 311835 no.689 Jiefang Road, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Huayi Precision Machinery Co.,Ltd. Address before: 311835 no.689 Jiefang Road, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee before: ZHEJIANG HUAYI PRECISION MACHINERY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230908 Address after: 311800 Diankou Town Industrial Zone, Zhuji City, Shaoxing City, Zhejiang Province Patentee after: Zhejiang Sanshang Zhidi Technology Co.,Ltd. Address before: 311835 no.689 Jiefang Road, Diankou Town, Zhuji City, Shaoxing City, Zhejiang Province Patentee before: Zhejiang Huayi Precision Machinery Co.,Ltd. |