CN201016403Y

CN201016403Y - Automatic pressure control valve

Info

Publication number: CN201016403Y
Application number: CNU2007201032880U
Authority: CN
Inventors: 马尚权; 陈学习; 梁育龙; 梁为; 程根银; 孙志海; 徐志斌
Original assignee: North China Institute of Science and Technology
Current assignee: North China Institute of Science and Technology
Priority date: 2007-01-19
Filing date: 2007-01-19
Publication date: 2008-02-06
Anticipated expiration: 2017-01-19

Abstract

The utility model relates to an autocontrol pressure valve, and is characterized in that the utility model comprises a valve body; a plunger having a loop of concave margin in the middle arranged in the valve body; two sealing end covers arranged on both ends of the valve body, respectively; two groups of spacing columns arranged on both ends of the plunger, respectively; and springs arranged between the plunger and both of the end covers, respectively. A pressure air inlet is arranged in the middle of the wall surface of the valve body corresponding to the concave margin on the plunger; a gas inlet is arranged on the wall surface of the valve body on the side of the pressure air inlet; a pressure air outlet is arranged on the wall surface of the valve body opposite to the pressure air inlet; a transition port is arranged on the wall surface of the valve body opposite to the radial position of the pressure air inlet; a transition pipe is connected to the transition port; the other end of the transition pipe is connected to the wall surface of the valve body on the side of the pressure air outlet. The utility model can be used during plugging of the coal-seam gas-pressure sensing holes and plugging of poisonous and noxious gases in other occasions.

Description

A kind of automatic pressure control valve

Technical field

The utility model relates to a kind of gas pressure valve, particularly about a kind of automatic pressure control valve.

Background technique

Coal mine gas is one of principal element that threatens Safety of Coal Mine Production, in order to guarantee safety in production, will carry out the detection of gas pressure in advance to the coal seam that will exploit according to the standard of safety in production in the mine.When gas pressure detects, need beat unquarried coal seam and detect the hole, and carry out shutoff detecting the hole.In the prior art, coal-bed gas is detected the method that shutoff is carried out in the hole, the general employing in detecting the hole pours into yellow mud or materials such as rubber or silica gel or non-shrinkage cement, treats plug curing or solidify the back to form detecting the shutoff in hole.Yet these conventional shutoff materials are after solidifying or solidifying, and volume some minor variations can take place, and makes plugging effect unsatisfactory, and regular meeting leaks gas during shutoff face, thereby influences the precision of gas pressure measured load.

At the problems referred to above, the applicant has developed a kind of three-phase froth sealing fluid that adopts coal-bed gas has been detected the method (as shown in Figure 1) that shutoff is carried out in the hole, it is the plug 3 that two sections conventional materials are set in the gas detection hole 2 in coal seam 1,4, between gas detection 2 inner ends, hole and plug 4, leave an intersegmental crack, form a methane gas chamber 5, at two sections plugs 3, the three-phase froth sealing fluid of perfusion the applicant development forms a sealing fluid perfusion compartment 6 between 4, and by inflating the pressure that the pressure that keeps sealing fluid is higher than methane gas, make the pressure of sealing fluid 6 can withstand the extruding of methane gas to plug 4, and make sealing fluid can penetrate into the fine and closely woven hole and the plug 3 in coal seam 1 well, in the hole that 4 expansions or curing back form, after sealing fluid solidifies, can form an integral body, thereby efficiently solve the problems of the prior art with the coal seam.Yet stating in realization needs an automatic pressure control valve in the method for blocking.

Summary of the invention

The purpose of this utility model provides a kind ofly to be used in realizing three-phase froth sealing fluid method for blocking process, can be according to methane gas variation in pressure and regulate the automatic pressure control valve of sealed fluid pressure automatically in detecting interporal lacuna.

For achieving the above object, the utility model is taked following technological scheme: a kind of automatic pressure control valve, it is characterized in that: it comprises a valve body, the piston that has the recessed edge of a circle in the middle of one is set in described valve body, in described two ends of valve body one end cover is set respectively, at the two ends of described piston one group of limited post is set respectively, between described piston and described two end cap, a spring is set respectively; Corresponding at the middle part of described valve body wall a pressed gas import is set with recessed edge on the described piston, one methane gas import is set on the valve body wall of described pressed gas import one side, the outlet of one pressed gas is set on the valve body wall of described pressed gas import opposite side, be provided with one on the valve body wall relative and cross the ferry with described pressed gas import radial position, connect a transition tube on the ferry described the mistake, the other end of described transition tube is connected described pressed gas and exports on the valve body wall of a side.

The limited post length of described methane gas import one side is: when this lateral confinement position column end was withstood described end cap, the recessed edge at described piston middle part all was positioned at the valve body wall near described methane gas import one side just; The limited post length that described pressed gas exports a side is: when this lateral confinement position column end was withstood described end cap, the recessed edge at described piston middle part all was positioned at described pressed gas inlet just.

Every group of described limited post is three, and the phase angle between three described limited posts is 120 °.

Be arranged on two springs between described piston and the described end cap, be enclosed within the outside of the described limited post of a relative side respectively.

In described two end covers, a seal rubber pad is set respectively.

The utility model is owing to take above technological scheme, it has the following advantages: 1, the utility model is provided with the piston that a middle part has recessed edge in a valve body, and limited post and spring are set respectively at the two ends of piston, when making piston under the effect of two springs, be in balance simultaneously, recessed edge on it just can be in the high pressure air at middle part and advance, the air outlet, a side that is communicated with the sealing fluid perfusion compartment in valve body is advanced high pressure air, make the sealing fluid perfusion compartment be enough to withstand the pressure that gas detects methane gas in the hole, thereby stop methane gas to flow out the coal seam, and sealing fluid is squeezed into the fine and closely woven hole of coal seam and plug, make and the encapsulating method of claimant's development is achieved.2, the utility model drives piston to two end motions by the variation of valve body pressure at two ends, the therefore automatic adjusting that can in transient equiliblium, keep-up pressure, and it is not only simple in structure, and easy to operate, and safe and reliable.The three-phase froth sealing fluid that the utility model can cooperate the applicant to invent well detects the hole to coal-bed gas pressure to carry out in the implementation process of method for blocking, and the utility model can also be used for the process of other gas shutoff.

Description of drawings

Fig. 1 is the utility model user mode schematic representation

Fig. 2 is the utility model structural representation (a non-air feed state)

Fig. 3 is the utility model air feed view

Embodiment

Below in conjunction with drawings and Examples the utility model is described in detail.

As shown in Figure 1 and Figure 2, automatic pressure control valve 10 of the present utility model comprises a valve body 11, the two ends of valve body 11 are provided with an

end cover

12,13 respectively, one piston 14 is set in valve body 11, the middle part of piston 14 has the recessed edge 15 of a circle, at piston 14 two ends one

limited post

16,17 that connects on it is set respectively, a

spring

18,19 is set respectively between piston 14 two ends and two end cap 12,13.Wall middle part at valve body 11 is provided with a pressed gas import 20, on valve body 11 walls of pressed gas import 20 1 sides a methane gas import 21 is set, and on valve body 11 walls of pressed gas import 20 opposite sides a sealed fluid pressure import 22 is set.Be provided with one on valve body 11 walls relative with pressed gas import 20 radial positions and cross ferry 23, crossing connection one transition tube 24 on the ferry 23, the other end of transition tube 24 is connected pressed gas and exports on valve body 11 walls of 22 1 sides.

In the foregoing description, the length of the limited post 16 of methane gas import 20 1 sides, be when withstanding end cap 12 in limited post 16 ends, the recessed edge 15 at piston 14 middle parts all is positioned at the left side of high-pressure air source air inlet/

outlet

20,21 just, be that recessed edge right hand piston part is blocked high-pressure air source air inlet/

outlet

20,21 just, high-pressure air source is in and stops the air feed state; Pressed gas exports the length of the limited post 17 of 22 1 sides, is when withstanding end cap 13 in limited post 17 ends, ground pressure gas inlet 20 places, the whole just position of the recessed edge 15 at piston 14 middle parts.

In the foregoing description, the

limited post

16,17 of piston 14 both sides, every group can be three, becomes the hexagonal angle setting,

limited post

16,17 quantity are to change between 1～4.Increase is provided with a

seal rubber pad

26,27 respectively to the sealing of two end covers 12,13 in two end covers 12,13.

Spring

18,19 can be enclosed within the outside of

limited post

16,17 in addition, also can be arranged in the space that each

limited post

16,17 surrounds.

In the foregoing description, the suction port 20 at valve body 11 middle parts and air outlet 23 must be arranged in the radial position, and the not necessarily non-requirement in the phase angle between the two is 180 °, as long as keep certain distance.

When the utility model is installed, pressed gas outlet 22 is connected sealing fluid perfusion compartment 6 by pipeline 7, methane gas import 21 by the methane gas chamber 5 in the pipeline 8 connection gas detection holes 2, is connected gas cylinder (such as nitrogen) 9 with pressed gas import 20 by pipeline.Piston 14 is when off working state, the setting principle of its left and

right sides spring

17,18 is to make the recessed edge 15 at piston 14 middle parts aim at pressed gas import 20 just, this moment, the pressure at piston 14 two ends was zero, the end of limited post 19 withstands on the rubber pad 27 in the right side end cover 13, makes pressure valve 10 of the present utility model be in opening state.

When the utility model uses, open high-pressure nitrogen bottle 9, high pressure nitrogen by pressed gas import 20, mistake ferry 23, transition tube 24, pressed gas outlet 22 and pipeline 7, enters sealing fluid perfusion compartment 6 successively.Along with the pressure of sealing fluid perfusion compartment 6 increases gradually, piston 14 is pushed to methane gas import 21 1 sides at leisure, pressed gas import 20 on the valve body 11 is reduced gradually, reduce gradually from transition tube 24 and pressed gas outlet 22 pressurized gas that pass through, until the utility model automatic pressure control valve 10 by Close All (as shown in Figure 3).The limited post 16 of methane gas one side withstood on the seal rubber pad 26 and can not move again this moment, high-pressure nitrogen bottle 9 still is in opening state, but can not be to sealing fluid perfusion compartment 6 air feed, the pressure that is communicated with a side this moment with sealing fluid perfusion compartment 6 should be greater than methane gas chamber 5 pressure 0.5MPa.As time goes on, 1 fine and closely woven hole flows to methane gas chamber 5 to methane gas along the coal seam gradually, the space pressure of methane gas import 22 1 sides increases gradually, up to its force value overrate (such as with sealing fluid perfusion compartment pressure less than 0.5MPa) time, piston 14 just can move to opposite side under the effect of pressure gradually, the recessed edge 15 at piston 14 middle parts is communicated with pressed gas import 20 gradually, from 6 inflations of trend sealing fluid perfusion compartment, piston 14 is controlled sealing fluid perfusion compartment 6 pressure automatically and is remained and be higher than methane gas chamber 0.5Mpa under the effect of this pressure transient equiliblium.

Claims

1. automatic pressure control valve, it is characterized in that: it comprises a valve body, the piston that has the recessed edge of a circle in the middle of one is set in described valve body, in described two ends of valve body one end cover is set respectively, at the two ends of described piston one group of limited post is set respectively, between described piston and described two end cap, a spring is set respectively; Corresponding at the middle part of described valve body wall a pressed gas import is set with recessed edge on the described piston, one methane gas import is set on the valve body wall of described pressed gas import one side, the outlet of one pressed gas is set on the valve body wall of described pressed gas import opposite side, be provided with one on the valve body wall relative and cross the ferry with described pressed gas import radial position, connect a transition tube on the ferry described the mistake, the other end of described transition tube is connected described pressed gas and exports on the valve body wall of a side.

2. a kind of automatic pressure control valve as claimed in claim 1, it is characterized in that: the limited post length of described methane gas import one side is: when this lateral confinement position column end was withstood described end cap, the recessed edge at described piston middle part all was positioned at the valve body wall near described methane gas import one side just; The limited post length that described pressed gas exports a side is: when this lateral confinement position column end was withstood described end cap, the recessed edge at described piston middle part all was positioned at described pressed gas inlet just.

3. a kind of automatic pressure control valve as claimed in claim 1 is characterized in that: every group of described limited post is three, and the phase angle between three described limited posts is 120 °.

4. a kind of automatic pressure control valve as claimed in claim 2 is characterized in that: every group of described limited post is three, and the phase angle between three described limited posts is 120 °.

5. as claim 1 or 2 or 3 or 4 described a kind of automatic pressure control valves, it is characterized in that: be arranged on two springs between described piston and the described end cap, be enclosed within the outside of the described limited post of a relative side respectively.

6. as claim 1 or 2 or 3 or 4 described a kind of automatic pressure control valves, it is characterized in that: in described two end covers, a seal rubber pad is set respectively.

7. a kind of automatic pressure control valve as claimed in claim 5 is characterized in that: in described two end covers a seal rubber pad is set respectively.