CN201321862Y - hydraulic two-way lock - Google Patents
hydraulic two-way lock Download PDFInfo
- Publication number
- CN201321862Y CN201321862Y CNU2008201244624U CN200820124462U CN201321862Y CN 201321862 Y CN201321862 Y CN 201321862Y CN U2008201244624 U CNU2008201244624 U CN U2008201244624U CN 200820124462 U CN200820124462 U CN 200820124462U CN 201321862 Y CN201321862 Y CN 201321862Y
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- CN
- China
- Prior art keywords
- piston
- cylindrical cavity
- plunger
- spool
- valve
- 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 - Lifetime
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Abstract
The utility model discloses a hydraulic two-way lock, which comprises a valve body (1), a valve sleeve, a piston (4) and a valve core (7), wherein, a cylindrical cavity is formed in the valve body (1); a liquid inlet PA, a liquid inlet PB, a liquid outlet A and a liquid outlet B which are communicated with the cylindrical cavity are formed on the two opposite surfaces in the vertical direction of the cylindrical cavity; the piston (4) is arranged in the center of the cylindrical cavity; piston return springs (5), a valve seat (6), the valve core (7), a spring (8) and the valve sleeve (9) are sequentially and symmetrically arranged on the left side and the right side of the piston (4); and a group of sealing structures which comprise a seal ring (2) and a retainer ring (3) are arranged on the piston (4). In the utility model, the piston return springs (5) are additionally arranged on the two sides of the piston (4), so that the piston (4) has the function of automatic return alignment and can smoothly operate during working process; and meanwhile, the sealing structure is only arranged on the piston (4), so that the sealing lock performance is not influenced, and the defect that the piston is easily blocked is solved.
Description
Technical field
The utility model belongs to coal mine fully-mechanized mining support apparatus field, particularly a kind of hydraulic bidirectional of hydraulic support lock.
Background technology
Hydraulic bidirectional lock is to keep the hydraulic support service behaviour promptly to one of most important valve class of the enabling capabilities of down-hole face guard, and it is installed on the wall supporting oil cylinder of hydraulic support, is the key element of hydraulic support.。Since year, the hydraulic bidirectional lock has satisfied the requirement of China's coal-mine equipment basically surplus the comprehensive mechanical coal mining technology 30 of China's employing hydraulic support.
The structure of the hydraulic bidirectional lock that adopts at present is divided into two classes substantially:
First kind of structure is made up of valve body, spool, spring, valve seat and plunger substantially, is example with present domestic QY type hydraulic lock, all adopts valve pocket formula spool, its structure be valve core housing in the valve seat the inside, that has relatively high expectations is slidingly matched.On the other hand, owing to adopt valve pocket formula spool, complex structure, corresponding valve body is also bigger, production and processing high material consumption, cost height.
Second class formation adopts post rod type hydraulic bidirectional lock, this kind reversible lock is mainly formed (its primary structure is seen accompanying drawing 3) by valve body, plunger, floating type spool, spring, external lug, combined type valve seat, its shortcoming is: 1) owing to adopt floating type spool, its structure is that spring housing is in the spool outside, do not cooperate between spool and the valve pocket, so just make guidance quality difference and the valve core movement of spool in moving process not steady.2) the plunger both sides do not have automatic-reset spring, and this will make reversible lock plunger operation when work not steady.3) two place's hermetically-sealed constructions are arranged on the plunger, will make plunger stuck easily when operation like this.
The utility model content
The purpose of this utility model is: overcome the deficiencies in the prior art, provide a kind of hydraulic bidirectional stable, that guidance quality is good to lock.
Technical solution of the present utility model is: a kind of hydraulic bidirectional lock, comprise valve body, valve pocket, plunger and spool, a cylindrical cavity is arranged in the valve body, there are two inlets and two liquid outlets to communicate respectively with two opposites of cylindrical cavity vertical direction with cylindrical cavity, plunger is installed at the center in the cylindrical cavity, plunger the right and left symmetry pack into successively plunger return spring, valve seat, spool, spring and valve pocket.
On the described plunger by one group of hermetically-sealed construction of forming by sealing ring and back-up ring.
Described spool is processed into stairstepping, makes to form two places between the two ends of spool and the valve pocket and be slidingly matched.
The utility model beneficial effect compared with prior art is:
1, the utility model has increased the plunger return spring in the plunger both sides, makes plunger that the effect of self-return centering be arranged, and makes plunger energy even running in the process of reversible lock work.
2, the utility model has only added place's hermetically-sealed construction (sealing ring and back-up ring) on plunger, so neither can influence the sealing latch performance, has also solved the shortcoming that plunger is stuck in motion process easily simultaneously.
3, the utility model adopts two places to be slidingly matched between spool and valve pocket, has solved guidance quality difference and the unsettled shortcoming of spool in moving process.
Description of drawings
Fig. 1 is a sectional view of the present utility model;
Fig. 2 is a front view of the present utility model;
Fig. 3 is the structural representation of existing floating type spool bidirectional hydraulic lock.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Shown in accompanying drawing 1,2, a kind of hydraulic bidirectional lock, comprise valve body 1, valve pocket, plunger 4 and spool 7, a cylindrical cavity is arranged in the valve body 1, with two opposites of cylindrical cavity vertical direction two inlet PA, PB and two liquid outlet A, B are arranged respectively, communicate with cylindrical cavity, plunger 4 is installed in center in the cylindrical cavity, plunger 4 the right and left symmetries pack into successively plunger return spring 5, valve seat 6, spool 7, spring 8 and valve pocket 9.
Hermetically-sealed construction on the plunger 4 has only one group, is made up of sealing ring 2 and back-up ring 3.
Spool of the present utility model is processed into stairstepping, make to form two places between the two ends of spool 7 and the valve pocket 9 and be slidingly matched, but fitting face is very little.
Hydraulic bidirectional lock operating principle of the present utility model is: when oil inlet P A passes through pressure oil, under the effect of pressure oil, compression diagram left side spring, left side spool is opened, pressure oil enters in the rodless cavity of corresponding hydraulic jack by oil-out A, load is moved, the pressure oil of oil inlet P A is as the control oil in another chamber simultaneously, under the effect of pressure control oil, plunger moves right, and opens right spool, oil in its corresponding hydraulic jack rod chamber flows back to fuel tank from the B mouth by the PB mouth, when hydraulic jack moved to desired position, the PA mouth stopped oil-feed, under the effect of spring force and oil cylinder working-pressure, left side spool is closed, be locking, load is slack, promptly hydraulic jack is locked on the desired position.Otherwise when oil inlet P B fed pressure oil, hydraulic jack fell, and locks it on the desired position.
The foregoing description is a kind of enumerating of the present utility model, and those skilled in the art can carry out various improvement and replacing not departing from according to different designing requirements and design parameters under the situation of the present utility model, fall into protection domain of the present utility model equally.
Claims (3)
1, a kind of hydraulic bidirectional lock, comprise valve body (1), valve pocket, plunger (4) and spool (7), a cylindrical cavity is arranged in the valve body (1), with two opposites of cylindrical cavity vertical direction two inlet PA, PB and two liquid outlet A, B are arranged respectively, communicate with cylindrical cavity, it is characterized in that: plunger (4) is installed in center in the cylindrical cavity, plunger (4) the right and left symmetry pack into successively plunger return spring (5), valve seat (6), spool (7), spring (8) and valve pocket (9).
2, according to a kind of hydraulic bidirectional lock of claim 1, it is characterized in that: one group of hermetically-sealed construction of being made up of sealing ring (2) and back-up ring (3) is arranged on the described plunger (4).
3, according to a kind of hydraulic bidirectional lock of claim 1, it is characterized in that: described spool (7) is processed into stairstepping, and formation two places are slidingly matched between the two ends that make spool (7) and the valve pocket (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201244624U CN201321862Y (en) | 2008-12-11 | 2008-12-11 | hydraulic two-way lock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201244624U CN201321862Y (en) | 2008-12-11 | 2008-12-11 | hydraulic two-way lock |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201321862Y true CN201321862Y (en) | 2009-10-07 |
Family
ID=41159246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201244624U Expired - Lifetime CN201321862Y (en) | 2008-12-11 | 2008-12-11 | hydraulic two-way lock |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201321862Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587950A (en) * | 2012-03-09 | 2012-07-18 | 中煤北京煤矿机械有限责任公司 | Double-buffering type pushing check valve |
-
2008
- 2008-12-11 CN CNU2008201244624U patent/CN201321862Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587950A (en) * | 2012-03-09 | 2012-07-18 | 中煤北京煤矿机械有限责任公司 | Double-buffering type pushing check valve |
| CN102587950B (en) * | 2012-03-09 | 2014-07-23 | 中煤北京煤矿机械有限责任公司 | Double-buffering type pushing check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20091007 |
|
| CX01 | Expiry of patent term |