CN204878877U - Draw lapse check valve - Google Patents
Draw lapse check valve Download PDFInfo
- Publication number
- CN204878877U CN204878877U CN201520488466.0U CN201520488466U CN204878877U CN 204878877 U CN204878877 U CN 204878877U CN 201520488466 U CN201520488466 U CN 201520488466U CN 204878877 U CN204878877 U CN 204878877U
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- Prior art keywords
- valve
- liquid
- hole
- work
- cavity
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- Expired - Fee Related
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Abstract
The utility model discloses a draw lapse check valve, including the valve body with establish the case in the valve body, be equipped with inlet, time liquid mouth, work inlet, work liquid outlet on the valve body, the case is established between inlet and work inlet, and the cover is equipped with the spring on the case to be equipped with the orifice at the case top, be equipped with back the liquid valve between work liquid outlet and time liquid mouth. Start in the twinkling of an eye, the working solution orifice from the case earlier gets into, and the working solution of low discharge gets into the promotion chamber in piston chamber, and the jack slowly starts, when the pressure lifting in promotion chamber, opens the valve port completely, and the execution effectively reduces to start temporal impact force.
Description
Technical field
The utility model relates to valve technology field, especially relates to one and draws pushing check valve.
Background technique
The advancing jack system of existing upside-down mounting; handling the moment of trying to stop people from fighting each other; the excessive active chamber being full of oil hydraulic cylinder instantaneously of valve flow; advancing jack and the moment impact between fitting that is connected; in the life-span of the component such as cross connecting head, shear pin that direct impact is connected with scraper-trough conveyer, the structures shape of upside-down mounting advancing jack locking chamber is rod end chamber, tries to stop people from fighting each other and often can cause the pressurized effect of jack; the safety valve passed frequently is opened, affects working life.
Model utility content
Not enough for prior art, technical problem to be solved in the utility model is to provide a kind ofly draws pushing check valve, its buffer starting with soft start, reduces impact force.
In order to solve the problems of the technologies described above, the technological scheme that the utility model adopts is:
One draws pushing check valve, comprise valve body and be located at the spool in valve body, described valve body is provided with liquid entering hole, liquid return hole, work liquid entering hole, work liquid outlet, described spool is located between liquid entering hole and work liquid entering hole, valve core upper sleeve is equipped with spring, and be provided with throttle orifice at spool top, be provided with back liquid valve between described work liquid outlet and liquid return hole.
Further, described spool is the hollow cylinder structure of one end open, and the open-ended of hollow cylinder structure is connected with liquid entering hole, and throttle orifice is located at the sealed end of hollow cylinder structure.
Being provided with the cavity for arranging back liquid valve in described valve body, in valve body, being provided with the through hole of connection work liquid outlet and cavity, in through hole, be provided with the unidirectional spring valve that can flow to cavity from work liquid outlet.
Described time liquid valve comprises push rod, and described push rod one end is set with Compress Spring, and the push rod the other end is provided with piston, and piston is corresponding with through hole, is provided with the unidirectional spring valve that can flow to cavity from work liquid outlet in through hole; Be provided with valve pad by work liquid outlet place in the cavity of valve body, push rod is provided with projection, and protruding matching with valve pad forms back liquid valve port, and the cavity going back to liquid valve port side is connected with work liquid outlet, and the cavity returning liquid valve port opposite side is connected with liquid return hole.
The utility model compared with prior art, has the following advantages:
Start moment, working solution first enters from the throttle orifice spool, and the working solution of small flow enters the push chamber of piston cavity, and jack slowly starts, and when the pressure of push chamber raises, opens valve port completely, execution, effectively reduces the impact force starting moment.
Accompanying drawing explanation
Below the content expressed by each width accompanying drawing of this specification and the mark in figure are briefly described:
Fig. 1 is the utility model one-way valve sectional view.
Fig. 2 is along B-B sectional view in Fig. 1.
Fig. 3 is the utility model non-return valve operational schematic diagram.
In figure: 1. push rod, 2. end cap, 3. valve body, 4. spring I, 5. valve pad, 6. valve holder, 7. guide pin bushing, 8. piston, 9. spool, the 10. spacing swivel nut of spring II, 11., 12. push rods, 13. spring III, 14. screw plugs.
Embodiment
Contrast accompanying drawing below, by the description to embodiment, embodiment of the present utility model is described in further detail.
As shown in Figure 1 to Figure 3, this draws pushing check valve, the spool 9 comprising valve body 3 and be located in valve body 3, and wherein, valve body 3 side is provided with liquid entering hole PA and liquid return hole PB side by side, valve body 3 opposite side is provided with side by side work liquid entering hole A and work liquid outlet B.
Liquid entering hole is oppositely arranged with work liquid entering hole and is located on valve body, form valve pocket between the two, spool 9 is provided with in valve pocket, spool 9 is the hollow cylinder structure of one end open, the connection corresponding with liquid entering hole of hollow cylinder structural openings end, in liquid entering hole, be provided with spacing swivel nut 11, between spacing swivel nut 11 and the open end of hollow cylinder structure, be provided with spring II 10.
In valve body 3, corresponding work liquid entering hole is provided with step, step formation valve port corresponding with the sealed end of spool, and the sealed end of spool 9 is provided with throttle orifice, and throttle orifice makes liquid entering hole be connected with work liquid entering hole.
Liquid valve is provided with back between valve body 3 inherence work liquid outlet and liquid return hole, namely the cavity for arranging back liquid valve is provided with in valve body, the through hole of connection work liquid outlet and cavity is provided with in valve body, the unidirectional spring valve that can flow to cavity from work liquid outlet is provided with in through hole, the spring III 13 that unidirectional spring valve comprises push rod 12 and is located on push rod 12, push rod 12 is arranged on valve body by screw plug 14.
Returning liquid valve is arranged in the cavity of valve body, and return liquid valve and comprise push rod 1, push rod 1 loads in cavity by the end cap 2 on valve body, the spring I 4 be enclosed within push rod is provided with between push rod and end cap, spring I is in compressive state, and push rod 1 the other end is provided with piston 8, and piston is corresponding with through hole.
The guide pin bushing 7 of piston movement is provided with in the cavity of valve body, namely piston is located in guide pin bushing, guide pin bushing 7 is fixed on valve body, guide pin bushing 7 is provided with valve holder 6 with the corresponding end of work liquid outlet, valve holder 6 is provided with valve pad 5, is provided with projection in the middle part of push rod, protruding matching with valve pad forms back liquid valve port, the cavity going back to liquid valve port side is connected with work liquid outlet, and the cavity returning liquid valve port opposite side is connected with liquid return hole.
Valve body 3 is provided with relief valve port B ˊ, and relief valve port is corresponding with work liquid outlet, and be provided with rubber valve block in passage between relief valve port and work liquid outlet, when pressure is excessive, rubber valve block is extruded distortion, opens passage and carries out release.
This draws pushing check valve for the control of coal mine hydraulic supporting hydraulic system, realizes unlatching and the locking of advancing jack active chamber; Start moment, working solution first enters from the throttle orifice spool, and the working solution of small flow enters the push chamber of piston cavity, and jack slowly starts, and when the pressure of push chamber raises, opens valve port completely, execution, effectively reduces the impact force starting moment.
During work, first enter work liquid entering hole A from the throttle orifice spool by the working solution of liquid entering hole PA, jack slowly starts, and the pressure of the liquid entering hole that works afterwards raises, and is opened by the valve port of spool, and normal feed liquor promotes jack work; The liquid of liquid entering hole of now working is opened unidirectional spring valve and is entered in cavity, promotes piston, and piston driving push rod compresses, and the valve port between push rod projection and valve pad is opened, and work liquid outlet B is connected with liquid return hole PB and carries out back liquid.
By reference to the accompanying drawings the utility model is exemplarily described above; obvious the utility model specific implementation is not subject to the restrictions described above; as long as have employed the improvement of the various unsubstantialities that design of the present utility model and technological scheme are carried out; or design of the present utility model and technological scheme directly applied to other occasion, all within protection domain of the present utility model without to improve.
Claims (4)
1. one kind is drawn pushing check valve, comprise valve body and be located at the spool in valve body, it is characterized in that: described valve body is provided with liquid entering hole, liquid return hole, work liquid entering hole, work liquid outlet, described spool is located between liquid entering hole and work liquid entering hole, valve core upper sleeve is equipped with spring, and be provided with throttle orifice at spool top, be provided with back liquid valve between described work liquid outlet and liquid return hole.
2. draw pushing check valve as claimed in claim 1, it is characterized in that: described spool is the hollow cylinder structure of one end open, and the open-ended of hollow cylinder structure is connected with liquid entering hole, and throttle orifice is located at the sealed end of hollow cylinder structure.
3. draw pushing check valve as claimed in claim 2, it is characterized in that: in described valve body, be provided with the cavity for arranging back liquid valve, be provided with the through hole of connection work liquid outlet and cavity in valve body, in through hole, be provided with the unidirectional spring valve that can flow to cavity from work liquid outlet.
4. draw pushing check valve as claimed in claim 3, it is characterized in that: described time liquid valve comprises push rod, described push rod one end is set with Compress Spring, and the push rod the other end is provided with piston, piston is corresponding with through hole, is provided with the unidirectional spring valve that can flow to cavity from work liquid outlet in through hole; Be provided with valve pad by work liquid outlet position in the cavity of valve body, push rod is provided with projection, and protruding matching with valve pad forms back liquid valve port, and the cavity going back to liquid valve port side is connected with work liquid outlet, and the cavity returning liquid valve port opposite side is connected with liquid return hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520488466.0U CN204878877U (en) | 2015-07-07 | 2015-07-07 | Draw lapse check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520488466.0U CN204878877U (en) | 2015-07-07 | 2015-07-07 | Draw lapse check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204878877U true CN204878877U (en) | 2015-12-16 |
Family
ID=54823251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520488466.0U Expired - Fee Related CN204878877U (en) | 2015-07-07 | 2015-07-07 | Draw lapse check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204878877U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989851A (en) * | 2015-07-07 | 2015-10-21 | 安徽凡尔煤矿设备制造有限公司 | Inverted-pull push check valve |
-
2015
- 2015-07-07 CN CN201520488466.0U patent/CN204878877U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104989851A (en) * | 2015-07-07 | 2015-10-21 | 安徽凡尔煤矿设备制造有限公司 | Inverted-pull push check 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 |
Granted publication date: 20151216 Termination date: 20170707 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |