CN104500111B - Two-stage open-type high-flow safety valve - Google Patents
Two-stage open-type high-flow safety valve Download PDFInfo
- Publication number
- CN104500111B CN104500111B CN201410765126.8A CN201410765126A CN104500111B CN 104500111 B CN104500111 B CN 104500111B CN 201410765126 A CN201410765126 A CN 201410765126A CN 104500111 B CN104500111 B CN 104500111B
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- CN
- China
- Prior art keywords
- valve
- valve body
- nipple
- safety valve
- valve element
- 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.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
Abstract
The invention discloses a kind of two-stage open-type high-flow safety valve, including valve body, the front end of valve body is provided with nipple, valve element is provided with valve body and nipple, the front portion of valve element is equipped with sealing gasket, spring is provided between the rear portion of valve element and the rear wall of valve body, forms conical surface soft seal between nipple and sealing gasket；Air vent and big flow leakage opening is provided with nipple, and the core of valve element is provided with the throttling elongated hole that diameter and length are fixed；The rear wall of valve body is provided with through hole, and through hole is equipped with the second safety valve.Two grades of unlatchings are realized by valve body and secondary safety valve, when low discharge drainage, only secondary safety valve is opened, and works as hypertonia, and valve element under differential pressure action is opened big flow drainage, realizes big flow drainage.Can abrupt release high pressure, the damage that protection equipment is caused from impacting with high pressure, it is big to open sensitive, flow, can protect oil cylinder of hydraulic support very well.
Description
Technical field
A kind of a kind of the present invention relates to coal-mine hydraulic support annex, more particularly to two-stage open-type high-flow safety valve.
Background technology
With the continuous development of coal-mine integrated-mining equipment hydraulic support, hydraulic support working resistance is increasing, hydraulic jack
Diameter is above 500mm, this high-flow safety valve performance requirement more and more higher just to use on hydraulic support hydraulic cylinder, when
During old power station, the highly pressurised liquid in column must have column safety valve fast discharging, in case column sustains damage and protects vertical
The constant-resistance that post is supported.So safety valve can off-load in time directly affect the intensity of support, safety coefficient and straight shield ability
Play.
The safety valve of prior art, mainly has valve casing, valve body, voltage regulation screw, spring, valve element etc. to constitute, is provided with valve element
Overflow aperture, traditionally this valve element unloading add cylindrical spring structure meet low discharge, when roof weighting, if can not
Moment unloads, then pressure-bearing is excessive, Valve Vibration occurs, and fluctuation of service can cause damage to equipment.Existing safety valve is for bullet
The requirement of spring is also very harsh, to prevent spring to be damaged under instantaneous pressure impact.If it is intended to obtaining flow is more than 2000L/
Min will cause existing structure size to become very huge, and for the requirement of spring harsher.
Content of the invention
It is an object of the invention to provide a kind of open the big two-stage open-type high-flow safety valve of sensitive, flow.
The purpose of the present invention is achieved through the following technical solutions：
The two-stage open-type high-flow safety valve of the present invention, including valve body, the front end of the valve body is provided with nipple, institute
State and in valve body and nipple, be provided with valve element, the front portion of the valve element is equipped with sealing gasket, the rear portion of the valve element and the valve body
Rear wall between be provided with spring, between the nipple and sealing gasket formed the conical surface-soft seal；
Air vent and big flow leakage opening is provided with the nipple, and the core of the valve element is provided with diameter and length
Fixed throttling elongated hole；
The rear wall of the valve body is provided with through hole, and the through hole is equipped with the second safety valve.
As seen from the above technical solution provided by the invention, two-stage open-type big flow provided in an embodiment of the present invention
Safety valve, due to being provided with the second safety valve, realizes two grades of unlatchings by valve body and secondary safety valve, when low discharge drainage, only
There is secondary safety valve to open, work as hypertonia, valve element under differential pressure action is opened big flow drainage, realizes big flow drainage.Energy
Enough abrupt release high pressure, the damage that protection equipment is caused from impacting with high pressure are opened sensitive, flow greatly, can protect liquid very well
Pressure support oil cylinder.
Description of the drawings
Fig. 1 is the structural representation of two-stage open-type high-flow safety valve provided in an embodiment of the present invention.
In figure：1st, nipple, 2, protective case, 3, sealing gasket, 4, sliding sleeve, 5, valve element, 6, valve body, 7, spring, 8, U-shaped
Card, 9, FAD125/50 safety valves, 10, dust-proof seal ring, 11, dust-proof cushion, 12, big flow leakage opening, 13, air vent.
Specific embodiment
The embodiment of the present invention will be described in further detail below.
The two-stage open-type high-flow safety valve of the present invention, its preferably specific embodiment is：
Including valve body, the front end of the valve body is provided with nipple, is provided with valve element in the valve body and nipple, described
The front portion of valve element is provided with spring between the rear wall equipped with sealing gasket, the rear portion of the valve element and the valve body, the nipple
The conical surface-soft seal is formed between sealing gasket；
Air vent and big flow leakage opening is provided with the nipple, and the core of the valve element is provided with diameter and length
Fixed throttling elongated hole；
The rear wall of the valve body is provided with through hole, and the through hole is equipped with the second safety valve.
The nipple is provided with the air vent of the big flow leakage opening and a φ 1.5mm of eight φ 6mm.
The sealing gasket is fixed on the valve element by sliding sleeve and protective case.
Second safety valve is FAD125/50 safety valves, leads between the rear portion of the valve body and FAD125/50 safety valves
Cross U-shaped card to be connected.
The air vent is equipped with dust-proof seal ring, and the big flow leakage opening is equipped with dust-proof cushion.
The sealing gasket is made using PEEK materials.
The present invention hydraulic pressure of the colliery oil cylinder high pressure two-stage open-type high-flow safety valve, can abrupt release high pressure,
The damage that protection equipment is caused from impacting with high pressure.
The present invention has large diameter and little fluid resistance, for hydraulic oil cylinder of hydraulic support, with respect to the peace of other standards
Full valve, this New-type safety valve realize big fluid throughput by booster, therefore its sensitive opening, and flow is big, can be very
Oil cylinder of hydraulic support is protected well.
Specific embodiment：
As shown in figure 1, including the nipple 1 for offering big flow runner, the pressure being arranged in 6 spring chamber of valve body
Spring 7 is acted on valve element 5, and the sealing gasket 3 is fixed on formation core assembly on valve element 5 by protective case 2 and sliding sleeve 4；Institute
State sealing gasket 3 and nipple 1 forms taper-soft seal joint；6 afterbody of the valve body and FAD125/50 safety valves 9 pass through U
Shape card 8 is connected.
Two-stage open-type high-flow safety valve operation principle is as follows：
When come to press be not that very rapidly pressure obtains FAD125/50 safety valves 9 and carries out drainage, now nipple 1 and sealing
The sealing of pad 3 is not turned on；When roof weighting forms instantaneous pressure, after throttle orifice of the pressure on valve element 5, FAD125/50 safety
Valve 9 can not meet requirement, form pressure reduction before and after valve element 5, and when certain value is reached, core assembly compression spring 7 is moved, sealing gasket
3 are failed with 1 sealing pair of nipple, are realized big flow drainage by the big flow liquid pass hole of nipple 1, are played protection hydraulic pressure
The effect of equipment.The dust ring of big flow passage and air vent is set on the outer surface of nipple 1.
Advantage of the present invention to be that and realize two grades of unlatchings by the valve body 6 and FAD125/50 safety valves 9, and both pass through U
Shape card 8 tightens together, and when low discharge drainage, only FAD125/50 safety valves 9 are opened, and work as hypertonia, and valve element is in pressure reduction
Effect is lower to open big flow drainage, realizes big flow drainage.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope of present disclosure, the change or replacement that can readily occur in,
Should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Enclose and be defined.
Claims (4)
1. a kind of two-stage open-type high-flow safety valve, it is characterised in that including valve body (6), the front end of valve body (6) is provided with
Valve element (5) is provided with nipple (1), valve body (6) and nipple (1), and the front portion of valve element (5) is equipped with sealing gasket
(3), spring (7), nipple (1) and sealing is provided between the rear portion of valve element (5) and the rear wall of the valve body (6)
The conical surface-soft seal is formed between pad (3)；
Air vent and big flow leakage opening is provided with the nipple (1), and the core of valve element (5) is provided with diameter and length
The fixed throttling elongated hole of degree；
The rear wall of valve body (6) is provided with through hole, and the through hole is equipped with the second safety valve；
Nipple (1) is provided with the air vent of the big flow leakage opening and a φ 1.5mm of eight φ 6mm；
Described sealing gasket (3) are fixed on the valve element (5) by sliding sleeve (4) and protective case (2).
2. two-stage open-type high-flow safety valve according to claim 1, it is characterised in that second safety valve is
FAD125/50 safety valves (9), are connected by U-shaped card (8) between the rear portion of the valve body and FAD125/50 safety valves (9).
3. two-stage open-type high-flow safety valve according to claim 2, it is characterised in that the air vent is equipped with dust-proof
Sealing ring (10), the big flow leakage opening are equipped with dust-proof cushion (11).
4. the two-stage open-type high-flow safety valve according to any one of claims 1 to 3, it is characterised in that the sealing
Pad (3) is made using PEEK materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765126.8A CN104500111B (en) | 2014-12-11 | 2014-12-11 | Two-stage open-type high-flow safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765126.8A CN104500111B (en) | 2014-12-11 | 2014-12-11 | Two-stage open-type high-flow safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104500111A CN104500111A (en) | 2015-04-08 |
| CN104500111B true CN104500111B (en) | 2017-03-15 |
Family
ID=52941550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410765126.8A Active CN104500111B (en) | 2014-12-11 | 2014-12-11 | Two-stage open-type high-flow safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104500111B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285104B (en) * | 2019-06-04 | 2020-12-01 | 常德中联重科液压有限公司 | Fixed-difference overflow valve and engineering machinery |
| CN113404522A (en) * | 2021-07-26 | 2021-09-17 | 郑州煤机综机设备有限公司 | Anti-expansion valve plug of hydraulic support upright post |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100559014C (en) * | 2007-10-24 | 2009-11-11 | 中国航天科技集团公司烽火机械厂 | A kind of multilevel control valve |
| CN103541748B (en) * | 2013-10-16 | 2015-06-17 | 辽宁工程技术大学 | Flushing preventing valve with single hydraulic prop |
| CN103835734B (en) * | 2014-04-02 | 2016-05-11 | 安徽理工大学 | The large flow hydraulic pressure of hydraulic prop triple-use valve |
| CN204327129U (en) * | 2014-12-11 | 2015-05-13 | 中煤北京煤矿机械有限责任公司 | Two-stage open-type high-flow safety valve |
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2014
- 2014-12-11 CN CN201410765126.8A patent/CN104500111B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104500111A (en) | 2015-04-08 |
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| C14 | Grant of patent or utility model | ||
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