CN201802419U - Safety valve with pressure balancing cavity - Google Patents
Safety valve with pressure balancing cavity Download PDFInfo
- Publication number
- CN201802419U CN201802419U CN2010205190673U CN201020519067U CN201802419U CN 201802419 U CN201802419 U CN 201802419U CN 2010205190673 U CN2010205190673 U CN 2010205190673U CN 201020519067 U CN201020519067 U CN 201020519067U CN 201802419 U CN201802419 U CN 201802419U
- Authority
- CN
- China
- Prior art keywords
- valve
- spool
- casing
- safety 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 - Fee Related
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Abstract
The utility model discloses a safety valve with a pressure balancing cavity, which comprises a valve body, a valve spool, a valve bush and a valve casing connected to the tail. Sealing rings are arranged in the valve body and the valve bush, one end of the valve bush is arranged in the valve body while the other end is arranged at the front end of the valve casing, drain holes are arranged on the valve spool, rail ends of the drain holes are capable of extending into the valve casing, a damping orifice is arranged in the middle of the valve spool, the top end of the valve spool contacts with a spring seat, a pressure regulating screw is arranged at the tail of the valve casing, and the pressure balancing cavity is formed between the valve spool and the valve bush by the aid of the damping orifice in the middle of the valve spool and the valve bush.
Description
Technical field
The utility model relates to the coal mine fully-mechanized mining the valve for roof support, relates in particular to the high-flow safety valve that is used on the hydraulic support.
Background technology
Implement and development along with coal mine fully-mechanized mining is large-scale; it is also more and more to the requirement of hydraulic support to combine the work of adopting; the support of big impedance, big mining height is a kind of development trend; so just the safety valve to the protective cradle hydraulic jack has had further requirement; especially big flow and the high pressure to safety valve had higher demand; when the pressure from the hydraulic support top causes by power; can safety valve bear under the situation of high pressure, and the short time, in time abundant stable off-load directly influenced intensity, application life and the supporting safety of support.In hydraulic system, when closing suddenly or opening fluid course, fluid pressure takes place sharply alternately that the wave process of lifting is called hydraulic shock in passage.When hydraulic shock occurring, often than high several times of service pressure, it not only can damage seal, pipeline and Hydraulic Elements to the instantaneous peak value pressure in the liquid, but also can cause vibrations and noise; Sometimes make some pressure controlled Hydraulic Elements produce error.The safety valve that uses is because most of straight unloading way that adopts at present, under the high pressure operating mode, it is bigger that safety valve is opened instantaneous hydraulic shock, dynamic response is slow, when roof weighting is too urgent, often make the damage of components such as column, back timber of support, influence the support life-span, be unfavorable for combining the operate as normal of adopting.
The utility model content
The purpose of this utility model provides a kind of safety valve with pressure balance chamber, and big with the high-flow safety valve hydraulic shock that solves prior art, high-pressure situations is low following application life, and the big problem of the slow physical dimension of dynamic response.
In order to achieve the above object, the technical scheme that the utility model adopted is:
A kind of safety valve with pressure balance chamber, include valve body, spool, valve pocket and the valve casing that is connected afterbody, be provided with sealing ring in valve body and the valve pocket, and described valve pocket one end is positioned at valve body, the other end is arranged in valve casing front end inside, two row's leakage fluid drams are arranged on the described spool, the rear end can pass valve pocket and stretch in the valve casing, there is damping hole at the spool middle part, on the spring base that the contact of spool top is slided in valve casing, described valve casing afterbody valve has the voltage regulation screw of adjustable pressure, it is characterized in that: between described spool and the valve pocket, by the damping hole and a pressure balance chamber of valve pocket formation at spool middle part.
Described a kind of safety valve with pressure balance chamber is characterized in that: for being slidingly matched, there is the O shape circle of dustproof effect at valve body leakage fluid dram place between described valve casing and the spring base.
The pressure balance chamber of the utility model by being provided with; after spool is subjected to being higher than the setting opening pressure; highly pressurised liquid is by the damping hole at spool middle part; allow a part of highly pressurised liquid flow into pressure balance chamber between spool and the valve pocket; alleviated the hydraulic shock of spool moment unlatching to a great extent; and reduce the axial compression of spool to spring base; make the unlatching of safety valve in time stable and solved the larger-size problem of Direct Action Type high-flow safety valve; well protect the seal and the miscellaneous part of safety valve, increased the application life of safety valve greatly.
Description of drawings
Fig. 1 is the utility model structure structural representation.
The specific embodiment
As shown in Figure 1, a kind of safety valve with pressure balance chamber, include valve body 1, spool 2, valve pocket 3 and the valve casing 4 that is connected afterbody, special sealing ring 5 is all arranged in valve body and the valve pocket, and described valve pocket one end is positioned at valve body, the other end is arranged in valve casing front end inside, two row's leakage fluid drams are arranged on the described spool, the rear end can pass valve pocket and stretch in the valve casing, there is damping hole 6 at the spool middle part, on the spring base 7 that the contact of spool top is slided in valve casing, described valve casing afterbody valve has the voltage regulation screw 8 of adjustable pressure, connects by spring 9 between the spring base of slip and the voltage regulation screw.Described a kind of safety valve with pressure balance chamber is characterized in that: between described spool and the valve pocket, by a pressure balance chamber 10 of damping hole 6 and valve pocket formation at spool middle part.For being slidingly matched, there is the O shape circle 11 of dustproof effect at valve body leakage fluid dram place between described valve casing and the spring base.
Claims (2)
1. safety valve with pressure balance chamber, include valve body, spool, valve pocket and the valve casing that is connected afterbody, be provided with sealing ring in valve body and the valve pocket, and described valve pocket one end is positioned at valve body, the other end is arranged in valve casing front end inside, two row's leakage fluid drams are arranged on the described spool, the rear end can pass valve pocket and stretch in the valve casing, there is damping hole at the spool middle part, on the spring base that the contact of spool top is slided in valve casing, described valve casing afterbody valve has the voltage regulation screw of adjustable pressure, it is characterized in that: between described spool and the valve pocket, by the damping hole and a pressure balance chamber of valve pocket formation at spool middle part.
2. a kind of safety valve with pressure balance chamber according to claim 1 is characterized in that: for being slidingly matched, there is the O shape circle of dustproof effect at valve body leakage fluid dram place between described valve casing and the spring base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205190673U CN201802419U (en) | 2010-09-02 | 2010-09-02 | Safety valve with pressure balancing cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205190673U CN201802419U (en) | 2010-09-02 | 2010-09-02 | Safety valve with pressure balancing cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201802419U true CN201802419U (en) | 2011-04-20 |
Family
ID=43871924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205190673U Expired - Fee Related CN201802419U (en) | 2010-09-02 | 2010-09-02 | Safety valve with pressure balancing cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201802419U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410537A (en) * | 2013-08-20 | 2013-11-27 | 深圳市神拓机电设备有限公司 | Safety valve |
| CN104141502A (en) * | 2014-08-06 | 2014-11-12 | 巨隆集团芜湖兴隆液压有限公司 | Large flow safety valve |
| CN104141501A (en) * | 2014-08-06 | 2014-11-12 | 巨隆集团芜湖兴隆液压有限公司 | Valve element assembly of safety valve |
| CN104153795A (en) * | 2014-08-06 | 2014-11-19 | 巨隆集团芜湖兴隆液压有限公司 | Safety valve |
| CN105507932A (en) * | 2016-01-25 | 2016-04-20 | 巨隆集团芜湖兴隆液压有限公司 | Safety valve |
-
2010
- 2010-09-02 CN CN2010205190673U patent/CN201802419U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410537A (en) * | 2013-08-20 | 2013-11-27 | 深圳市神拓机电设备有限公司 | Safety valve |
| CN104141502A (en) * | 2014-08-06 | 2014-11-12 | 巨隆集团芜湖兴隆液压有限公司 | Large flow safety valve |
| CN104141501A (en) * | 2014-08-06 | 2014-11-12 | 巨隆集团芜湖兴隆液压有限公司 | Valve element assembly of safety valve |
| CN104153795A (en) * | 2014-08-06 | 2014-11-19 | 巨隆集团芜湖兴隆液压有限公司 | Safety valve |
| CN105507932A (en) * | 2016-01-25 | 2016-04-20 | 巨隆集团芜湖兴隆液压有限公司 | Safety valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110420 Termination date: 20130902 |