CN202718700U - Middle flow reversible lock - Google Patents
Middle flow reversible lock Download PDFInfo
- Publication number
- CN202718700U CN202718700U CN 201220397132 CN201220397132U CN202718700U CN 202718700 U CN202718700 U CN 202718700U CN 201220397132 CN201220397132 CN 201220397132 CN 201220397132 U CN201220397132 U CN 201220397132U CN 202718700 U CN202718700 U CN 202718700U
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- CN
- China
- Prior art keywords
- push rod
- valve seat
- valve
- unloading cavity
- reversible lock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a middle flow reversible lock. The middle flow reversible lock comprises a valve body, two valve sleeves and two sets of hydraulic assemblies, wherein the two valve sleeves are respectively arranged on two ends of the valve body. The two sets of hydraulic assemblies are symmetrically arranged in the valve body, and each hydraulic assembly comprises a valve core, a valve seat and a push rod, a unloading cavity is arranged on the valve seat, the valve seat is sleeved on the outer portion of the push rod, the head portion of the push rod extends into the unloading cavity of the valve seat, outer threads are arranged on a rod body of the head portion of the push rod, a limiting block is arranged in the valve seat close to the unloading cavity and provided with a through hole, and the inner wall of the through hole is provided with inner threads matched with the outer threads on the push rod. Compared with the prior art, due to the facts that the valve seat and the push rod are connected in threaded mode, the push rod can be screwed in the unloading cavity of the valve seat so as to form a plug-in mounting type hydraulic assembly, the whole middle flow reversible lock is high in system integration degree and convenient to mount and repair, and can be repaired by directly replacing the plug-in mounting type hydraulic assembly.
Description
Technical field
The utility model relates to the Hydraulic Elements in the coal mine hydraulic supporting hydraulic circuit, and specifically, the utility model relates to a kind of middle flow reversible lock.
Background technology
Middle flow reversible lock plays very important effect as the Hydraulic Elements of the two-way locking control of the hydraulic cylinders such as colliery support compensating cylinder, wall supporting cylinder, and the reliability direct relation of reversible lock the security and stability of each parts of support.Along with the colliery instructions for use more and more develops towards integrated and automation direction, reliability and application life require also more and more higher, traditional reversible lock is owing to adopting the conical surface seal of valve pad sealing or polyformaldehyde material, application life and accommodative ability of environment are not enough, valve pad is easy to destroy under the repeatedly extruding of valve seat, the sealing of conical surface polyformaldehyde also can be caused seal failure by cinder or other hard thing destruction, the part kind of valve inner is many, repair also very inconvenience, more and more do not satisfied the demand of colliery applying unit.
The utility model content
Technical problem to be solved in the utility model provides a kind of middle flow reversible lock simple and easy to maintenance of installing.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of middle flow reversible lock, comprise valve body, two valve pockets and two cover hydraulic packages, two valve pockets are located at respectively the two ends of valve body, two cover hydraulic package symmetries are located at the inside of valve body, hydraulic package comprises spool, valve seat and push rod, valve seat is provided with unloading cavity, valve seat is enclosed within the outside of push rod, the head of push rod also stretches in the unloading cavity of valve seat, the port with unloading cavity be communicated with of the head of spool on valve seat is connected with valve base sealing, also cover has return spring on push rod, head shaft at described push rod is provided with external screw thread, position in the inside of described valve seat near unloading cavity is provided with limited block, is provided with through hole at this limited block, the inwall of through hole be provided with push rod on the suitable internal thread of external screw thread, described return spring one end is against on the limited block, and the other end is against on the push rod.
Between described spool and the described valve seat for firmly being tightly connected.
The head of described spool is the frustum structure, and described push rod begins to contact in the port of described valve seat with spool.
The utility model adopts technique scheme, compared with prior art, valve seat and push rod are for being threaded, push rod can screw in the interior unloading cavity of valve seat, form the hydraulic package of plug-in, so that the level of integrated system of whole middle flow reversible lock is higher, be easy for installation and maintenance, can directly just can repair by changing plug-in hydraulic pressure assembly.
Description of drawings
Fig. 1 is the structural representation of middle flow reversible lock of the present utility model;
Mark among the above-mentioned figure is: 1, valve pocket; 2, spool; 3, valve body; 4, valve seat; 5, return spring; 6, push rod; 7, unloading cavity; 8, port; 9, limited block.
The specific embodiment
Be illustrated in figure 1 as a kind of middle flow reversible lock of the present utility model, it comprises valve body 3, two valve pockets 1 and two cover hydraulic packages, two valve pockets 1 are located at respectively the two ends of valve body 3, two cover hydraulic package symmetries are located at the inside of valve body 3, hydraulic package comprises spool 2, valve seat 4 and push rod 6, valve seat 4 is provided with unloading cavity 7, valve seat 4 is enclosed within the outside of push rod 6, the head of push rod 6 also stretches in the unloading cavity 7 of valve seat 4, port 8 places and the valve seat 4 that with unloading cavity 7 are communicated with of the head of spool 2 on valve seat 4 is tightly connected, and also cover has return spring 5 on push rod 6.In order to solve problems of the prior art, this reversible lock is provided with external screw thread at the head shaft of push rod 6, position at the close unloading cavity 7 in the inside of valve seat 4 is provided with limited block 9, be provided with through hole at this limited block 9, the inwall of through hole be provided with push rod 6 on the suitable internal thread of external screw thread, return spring 5 one ends are against on the limited block 9, and the other end is against on the push rod 6.Compared with prior art, valve seat 4 and push rod 6 be for being threaded, and push rod 6 can screw in the unloading cavity 7 in the valve seat 4, form the hydraulic package of plug-in, so that the level of integrated system of whole reversible lock is higher, be easy for installation and maintenance, directly just can repair by changing plug-in hydraulic pressure assembly.
In addition, for firmly being tightly connected, spool 2 adopts metal material to make between the spool 2 of this reversible lock and the valve seat 4, realize the hard sealing between valve body 3 and the valve seat 4, with respect to the sealing of softwood matter, firmly seal not only good seal performance, ability super-pressure also prolongs application life of reversible lock.As shown in Figure 1, the head of spool 2 and be the frustum structure, the head of spool 2 no longer stretches in the unloading cavity 7, and 2 port 8 places at valve seat 4 of push rod 6 and spool begin to contact, and the structure of spool 2 is simpler, the more compact structure of reversible lock integral body.
The above has carried out exemplary description to the utility model by reference to the accompanying drawings; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technical scheme carry out; or without improving design of the present utility model and technical scheme are directly applied to other occasion, all within protection domain of the present utility model.
Claims (3)
1. flow reversible lock in a kind, comprise valve body, two valve pockets and two cover hydraulic packages, two valve pockets are located at respectively the two ends of valve body, two cover hydraulic package symmetries are located at the inside of valve body, hydraulic package comprises spool, valve seat and push rod, valve seat is provided with unloading cavity, valve seat is enclosed within the outside of push rod, the head of push rod also stretches in the unloading cavity of valve seat, the port with unloading cavity be communicated with of the head of spool on valve seat is connected with valve base sealing, also cover has return spring on push rod, and it is characterized in that: the head shaft at described push rod is provided with external screw thread, is provided with limited block in the position of the close unloading cavity in the inside of described valve seat, be provided with through hole at this limited block, the inwall of through hole be provided with push rod on the suitable internal thread of external screw thread, described return spring one end is against on the limited block, the other end is against on the push rod.
2. middle flow reversible lock according to claim 1 is characterized in that: between described spool and the described valve seat for firmly being tightly connected.
3. middle flow reversible lock according to claim 1 and 2, it is characterized in that: the head of described spool is the frustum structure, described push rod begins to contact in the port of described valve seat with spool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220397132 CN202718700U (en) | 2012-08-06 | 2012-08-06 | Middle flow reversible lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220397132 CN202718700U (en) | 2012-08-06 | 2012-08-06 | Middle flow reversible lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202718700U true CN202718700U (en) | 2013-02-06 |
Family
ID=47620526
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220397132 Expired - Fee Related CN202718700U (en) | 2012-08-06 | 2012-08-06 | Middle flow reversible lock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202718700U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291341A (en) * | 2013-05-31 | 2013-09-11 | 巨隆集团芜湖兴隆液压有限公司 | Cartridge middle-flow balance bidirectional lock |
| CN103291340A (en) * | 2013-05-31 | 2013-09-11 | 巨隆集团芜湖兴隆液压有限公司 | Large-flow balance bidirectional lock |
| CN103291339A (en) * | 2013-05-31 | 2013-09-11 | 巨隆集团芜湖兴隆液压有限公司 | Medium flow balancing two-way lock |
| CN103291335A (en) * | 2013-05-31 | 2013-09-11 | 巨隆集团芜湖兴隆液压有限公司 | Balanced floating bidirectional lock |
| CN110185665A (en) * | 2019-05-22 | 2019-08-30 | 新乡市德恩智能工业有限公司 | A kind of holding valve |
-
2012
- 2012-08-06 CN CN 201220397132 patent/CN202718700U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103291341A (en) * | 2013-05-31 | 2013-09-11 | 巨隆集团芜湖兴隆液压有限公司 | Cartridge middle-flow balance bidirectional lock |
| CN103291340A (en) * | 2013-05-31 | 2013-09-11 | 巨隆集团芜湖兴隆液压有限公司 | Large-flow balance bidirectional lock |
| CN103291339A (en) * | 2013-05-31 | 2013-09-11 | 巨隆集团芜湖兴隆液压有限公司 | Medium flow balancing two-way lock |
| CN103291335A (en) * | 2013-05-31 | 2013-09-11 | 巨隆集团芜湖兴隆液压有限公司 | Balanced floating bidirectional lock |
| CN110185665A (en) * | 2019-05-22 | 2019-08-30 | 新乡市德恩智能工业有限公司 | A kind of holding 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: 20130206 Termination date: 20160806 |