CN202718682U - Nitrogen safety valve for coal mine fully-mechanized mining hydraulic support - Google Patents
Nitrogen safety valve for coal mine fully-mechanized mining hydraulic support Download PDFInfo
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- CN202718682U CN202718682U CN 201220319587 CN201220319587U CN202718682U CN 202718682 U CN202718682 U CN 202718682U CN 201220319587 CN201220319587 CN 201220319587 CN 201220319587 U CN201220319587 U CN 201220319587U CN 202718682 U CN202718682 U CN 202718682U
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- valve
- swivel nut
- nitrogen
- storing cavity
- air storing
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Abstract
The utility model discloses a nitrogen safety valve for a coal mine fully-mechanized mining hydraulic support. The nitrogen safety valve comprises a valve shell and a valve core, wherein the valve core is arranged in a valve hole of the valve shell; unloading holes are formed on the outer walls of the valve core and the valve shell; one end of the valve shell is connected with a cylinder of the hydraulic support, and the other end of the valve shell is connected with one end of a threaded sleeve; the other end of the threaded sleeve is closed; an oil inlet is formed on the valve shell; a gas storage cavity is formed in the threaded sleeve, and nitrogen is stored in the gas storage cavity; the valve hole is communicated with the oil inlet and the gas storage cavity; and the valve core in the valve hole is reset under the action of the nitrogen in the gas storage cavity. Compared with the prior art, the nitrogen safety valve has the advantage that the gas storage cavity stored with the nitrogen is formed on the safety valve, so that the characteristics of the nitrogen are sufficiently utilized; and compared with a mode of resetting with a spring, the safety valve has the advantages of wide applicable pressure range, ultrahigh pressure endurance, constant spring force and small size.
Description
Technical field
The utility model relates to the coal mine fully-mechanized mining hydraulic support, and specifically, the utility model relates to a kind of nitrogen safety valve for the colliery comprehensive mining hydraulic bracket.
Background technology
Large-scale enforcement and development along with the coal mine fully-mechanized mining hydraulic support; working face is also more and more stricter to the requirement of hydraulic support; so just the safety valve of protective cradle hydraulic jack there has been further requirement; especially application life and the reliability of safety valve there has been further requirement; when the pressure from the hydraulic support top causes by power; can safety valve in the situation that bear high pressure, the short time in time fully stable off-load directly affect application life and the supporting safety of support.It not only can damage seal, pipeline and Hydraulic Elements, but also can cause vibrations and noise; Sometimes make some pressure controlled Hydraulic Elements produce error.The structure of the safety valve that uses at present as shown in Figure 2, it comprises valve body 14, spool 2, valve casing 1 and the spring that is built in the valve casing 1, has unloading hole on valve casing 1 and the spool 2, when the cylinder force of hydraulic support surpasses the pressure that spring sets up, spool 2 promotes spring base and moves to afterbody under pressure promotes, when the unloading hole on the spool 2 moves past special sealing ring, hydraulic oil is discharged from the unloading hole on the valve casing 1, because there is reliably sealing performance spring base and valve casing 1 inside, hydraulic oil does not enter the spring working chamber, at this moment the pressure in the oil cylinder can reduce along with off-load, when the pressure of oil cylinder during less than the power of spring, safety valve is resetted by spring action, recovers sealing state.Safety valve adopts spring to reset, but the pressure-bearing scope of spring is little, and can not bear super-pressure, cause the working pressure scope of safety valve little, the use of safety valve is restricted, in addition, spring takes up room greatly, make the volume of safety valve become large, spring also needs just can reach by pretension the elastic force pressure of needs, and elastic force pressure is non-constant.
The utility model content
Technical problem to be solved in the utility model provides a kind of nitrogen safety valve for the colliery comprehensive mining hydraulic bracket, and this safety valve working pressure scope is wide, can bear super-pressure.
In order to solve the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of nitrogen safety valve for the colliery comprehensive mining hydraulic bracket, comprise valve casing and spool, described spool is built in the valve opening of described valve casing, outer wall at spool and valve casing is provided with unloading hole, one end of valve casing is connected with the oil cylinder of described hydraulic support, the other end is connected with an end of a swivel nut, the other end sealing of this swivel nut, have fuel feed hole on the valve casing, in swivel nut, have air storing cavity, store nitrogen in the air storing cavity, valve opening is communicated with fuel feed hole and air storing cavity, resets under the effect of the spool nitrogen in air storing cavity in the valve opening.
The end that described valve casing is connected with described swivel nut has the second air storing cavity that is communicated with air storing cavity on the swivel nut.
Described valve casing and described swivel nut are for being threaded, in described swivel nut, be provided with a limiting plate, the inwall of swivel nut is provided with the step of placing this limiting plate, the end that described valve casing is connected with swivel nut is resisted against on this limiting plate, also is provided with the air storing cavity that is communicated with on the described swivel nut and the through hole of the second air storing cavity on the limiting plate.
The end towards described swivel nut of described spool has the 3rd air storing cavity that is communicated with air storing cavity on the swivel nut.
The end towards described fuel feed hole of described spool has two deep holes that are communicated with fuel feed hole, is respectively equipped with a described unloading hole at each deep hole.
Be provided with the O RunddichtringO between described spool and the described valve casing.
Be provided with the O RunddichtringO between described valve casing and the described swivel nut.
Blind end at described swivel nut is provided with charge valve and screw plug, and screw plug is threaded with swivel nut and covers charge valve.
The utility model adopts technique scheme, compared with prior art, stores the air storing cavity of nitrogen safety valve setting, take full advantage of the characteristic of nitrogen, than the mode that adopts spring to reset, safety valve working pressure scope is wide, can bear super-pressure, elastic force pressure is constant, and volume is little.
Description of drawings
Fig. 1 is the structural representation of safety valve of the present utility model;
Fig. 2 is the structural representation of the safety valve in the background technology;
Mark among the above-mentioned figure is: 1, valve casing; 2, spool; 3, swivel nut; 4, limiting plate; 5, charge valve; 6, spring; 7, pad; 8, screw plug; 9, O RunddichtringO; 10, O RunddichtringO; 11, O RunddichtringO; 12, O RunddichtringO; 13, O RunddichtringO; 14, valve body; 15, air storing cavity; 16, the second air storing cavity; 17, the 3rd air storing cavity.
The specific embodiment
Be illustrated in figure 1 as a kind of nitrogen safety valve for the colliery comprehensive mining hydraulic bracket of the present utility model, the valve casing 1 and the spool 2 that comprise column, function and the structure of valve body that the valve casing 1 of safety valve has safety valve of the prior art is similar, for valve casing and the valve body of prior art integrated.The spool 2 of safety valve is built in the valve opening of valve casing 1, outer wall at spool 2 and valve casing 1 is provided with unloading hole, one end of valve casing 1 is connected with the oil cylinder of hydraulic support, and the other end is connected with an end of a swivel nut 3, the other end sealing of this swivel nut 3, swivel nut 3 is column, have fuel feed hole on the valve casing 1, in swivel nut 3, have air storing cavity 15, store nitrogen in the air storing cavity 15, valve opening is communicated with fuel feed hole and air storing cavity 15, resets under the effect of spool 2 nitrogen in air storing cavity 15 in the valve opening.Compared with prior art, store the air storing cavity 15 of nitrogen safety valve setting, take full advantage of the characteristic of nitrogen, than the mode that adopts spring to reset, safety valve working pressure scope is wide, can bear super-pressure, and elastic force pressure is constant, and volume is little.
As shown in Figure 1, the end that valve casing 1 is connected with swivel nut 3 has the second air storing cavity 16 that is communicated with air storing cavity 15 on the swivel nut 3, to increase the gas-storing capacity of safety valve.Valve casing 1 has internal thread with swivel nut 3 and for being threaded on swivel nut 3 inwalls, and the outer wall of valve casing 1 has external screw thread.Be provided with O RunddichtringO 11 between valve casing 1 and the swivel nut 3, this O RunddichtringO 11 is quality of rubber materials.In swivel nut 3, also be provided with a limiting plate 4, the inwall of swivel nut 3 is provided with the step of placing this limiting plate 4, the end that valve casing 1 is connected with swivel nut 3 is resisted against on this limiting plate 4, also is provided with the air storing cavity 15 that is communicated with on the swivel nut 3 and the through hole of the second air storing cavity 16 on the limiting plate 4.
As shown in Figure 1, the end towards swivel nut 3 of spool 2 has the 3rd air storing cavity 17, the three air storing cavities 17 that are communicated with air storing cavity 15 on the swivel nut 3 and also communicates with the second air storing cavity 16, further increases the gas-storing capacity of safety valve.The end towards fuel feed hole of spool 2 has two deep holes that are communicated with fuel feed hole, and this two deep holes symmetry is located on the spool 2, is respectively equipped with a unloading hole at each deep hole.Be provided with 3 O RunddichtringOs 13 between spool 2 and the valve casing 1, lay respectively at the position of the unloading hole both sides on the valve casing 1, this O RunddichtringO 13 is speciality O type circle, adopts the polyurethane material to make, and has good sealing effectiveness.
As shown in Figure 1, blind end at swivel nut 3 also is provided with charge valve 5 and screw plug 8, screw plug 8 is threaded with swivel nut 3 and covers charge valve 5, this charge valve 5 is located on the blind end of swivel nut 3, charge valve 5 one ends are positioned at swivel nut 3 inside, the other end is positioned at swivel nut 3 outsides, the end that charge valve 5 is positioned at swivel nut 3 inside has flange, the end that is positioned at swivel nut 3 outsides is provided with pad 7, also cover has spring 6 on charge valve 5, one end of this spring 6 is against on this pad 7, and the other end is against on the outer wall of blind end of swivel nut 3, has air-filled pore in the charge valve 5.Also be provided with O RunddichtringO 10 between charge valve 5 and the swivel nut 3, be provided with O RunddichtringO 9 between screw plug 8 and the swivel nut 3, to improve sealing performance, prevent the nitrogen leakage.The end that is connected with the oil cylinder of hydraulic support at valve casing 1 also is provided with O RunddichtringO 13, prevents the hydraulic oil leakage.
The operating principle of safety valve: during air pressure within the cylinder force of hydraulic support surpasses the air storing cavity 15 of safety valve, under the promotion of the hydraulic oil of spool 2 in the fuel feed hole that enters valve casing 1 to air storing cavity 15 interior movements, when the unloading hole on the spool 2 moves past O RunddichtringO 12, the hydraulic oil that enters in spool 2 deep holes is discharged from the unloading hole on the valve casing 1, because spool 2 has reliably sealing performance with valve casing 1 inside, hydraulic oil can not enter air storing cavity 15.Along with constantly sending of hydraulic oil, the pressure in the oil cylinder can reduce along with off-load, and when the pressure of oil cylinder during less than the air pressure in the air storing cavity 15, spool 2 is resetted by gas pressure, recovers sealing state.
The safety valve has advantages of simple in structure, good sealing effect.
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 (8)
1. nitrogen safety valve for the colliery comprehensive mining hydraulic bracket, comprise valve casing (1) and spool (2), it is characterized in that: described spool (2) is built in the valve opening of described valve casing (1), outer wall at spool (2) and valve casing (1) is provided with unloading hole, one end of valve casing (1) is connected with the oil cylinder of described hydraulic support, the other end is connected with an end of a swivel nut (3), the other end sealing of this swivel nut (3), valve casing has fuel feed hole on (1), in swivel nut (3), has air storing cavity (15), air storing cavity stores nitrogen in (15), valve opening is communicated with fuel feed hole and air storing cavity (15), resets under the effect of spool (2) nitrogen in air storing cavity (15) in the valve opening.
2. the nitrogen safety valve for the colliery comprehensive mining hydraulic bracket according to claim 1 is characterized in that: the end that described valve casing (1) is connected with described swivel nut (3) has the second air storing cavity (16) that is communicated with air storing cavity (15) on the swivel nut (3).
3. the nitrogen safety valve for the colliery comprehensive mining hydraulic bracket according to claim 2, it is characterized in that: described valve casing (1) and described swivel nut (3) are for being threaded, in described swivel nut (3), be provided with a limiting plate (4), the inwall of swivel nut (3) is provided with the step of placing this limiting plate (4), the end that described valve casing (1) is connected with swivel nut (3) is resisted against on this limiting plate (4), also is provided with the air storing cavity (15) that is communicated with on the described swivel nut (3) and the through hole of the second air storing cavity (16) on the limiting plate (4).
4. it is characterized in that according to claim 2 or 3 described nitrogen safety valves for the colliery comprehensive mining hydraulic bracket: the end towards described swivel nut (3) of described spool (2) has the 3rd air storing cavity (17) that is communicated with air storing cavity (15) on the swivel nut (3).
5. the nitrogen safety valve for the colliery comprehensive mining hydraulic bracket according to claim 4, it is characterized in that: the end towards described fuel feed hole of described spool (2) has two deep holes that are communicated with fuel feed hole, is respectively equipped with a described unloading hole at each deep hole.
6. the nitrogen safety valve for the colliery comprehensive mining hydraulic bracket according to claim 5 is characterized in that: be provided with O RunddichtringO (12) between described spool (2) and the described valve casing (1).
7. the nitrogen safety valve for the colliery comprehensive mining hydraulic bracket according to claim 6 is characterized in that: be provided with O RunddichtringO (11) between described valve casing (1) and the described swivel nut (3).
8. the nitrogen safety valve for the colliery comprehensive mining hydraulic bracket according to claim 7, it is characterized in that: the blind end at described swivel nut (3) is provided with charge valve (5) and screw plug (8), and screw plug (8) is threaded with swivel nut (3) and covers charge valve (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220319587 CN202718682U (en) | 2012-07-04 | 2012-07-04 | Nitrogen safety valve for coal mine fully-mechanized mining hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220319587 CN202718682U (en) | 2012-07-04 | 2012-07-04 | Nitrogen safety valve for coal mine fully-mechanized mining hydraulic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202718682U true CN202718682U (en) | 2013-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220319587 Withdrawn - After Issue CN202718682U (en) | 2012-07-04 | 2012-07-04 | Nitrogen safety valve for coal mine fully-mechanized mining hydraulic support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202718682U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748041A (en) * | 2012-07-04 | 2012-10-24 | 巨隆集团芜湖兴隆液压有限公司 | Nitrogen safety valve for hydraulic support in coal mine fully mechanized mining |
-
2012
- 2012-07-04 CN CN 201220319587 patent/CN202718682U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748041A (en) * | 2012-07-04 | 2012-10-24 | 巨隆集团芜湖兴隆液压有限公司 | Nitrogen safety valve for hydraulic support in coal mine fully mechanized mining |
| CN103953369A (en) * | 2012-07-04 | 2014-07-30 | 巨隆集团芜湖兴隆液压有限公司 | Nitrogen safety valve used by coalmine fully-mechanized mining hydraulic bracket |
| CN103953371A (en) * | 2012-07-04 | 2014-07-30 | 巨隆集团芜湖兴隆液压有限公司 | Nitrogen safety valve used by coalmine fully-mechanized mining hydraulic bracket |
| CN103953372A (en) * | 2012-07-04 | 2014-07-30 | 巨隆集团芜湖兴隆液压有限公司 | Nitrogen safety valve used by coalmine fully-mechanized mining hydraulic bracket |
| CN103953370A (en) * | 2012-07-04 | 2014-07-30 | 巨隆集团芜湖兴隆液压有限公司 | Nitrogen safety valve used by coalmine fully-mechanized mining hydraulic bracket |
| CN103953370B (en) * | 2012-07-04 | 2016-01-27 | 巨隆集团芜湖兴隆液压有限公司 | A kind of nitrogen safety valve for colliery comprehensive mining hydraulic bracket |
| CN103953369B (en) * | 2012-07-04 | 2016-01-27 | 巨隆集团芜湖兴隆液压有限公司 | A kind of nitrogen safety valve for colliery comprehensive mining hydraulic bracket |
| CN103953371B (en) * | 2012-07-04 | 2016-02-10 | 巨隆集团芜湖兴隆液压有限公司 | A kind of nitrogen safety valve for colliery comprehensive mining hydraulic bracket |
| CN103953372B (en) * | 2012-07-04 | 2016-02-10 | 巨隆集团芜湖兴隆液压有限公司 | A kind of nitrogen safety valve for colliery comprehensive mining hydraulic bracket |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130206 Effective date of abandoning: 20141001 |
|
| RGAV | Abandon patent right to avoid regrant |