Gas extraction hole packer

Abstract

The utility model discloses a gas extraction hole packer in the technical field of hole packers.The gas extraction hole packer comprises at least two hole sealing bags and further comprises a gas pipe and a grouting pipe which penetrate through all the hole sealing bags, a closed space is formed between every two adjacent hole sealing bags, and the grouting pipe is provided with an explosion valve located in the closed space; the gas pipe is located above the grouting pipe, the gas pipe is provided with an exhaust hole located in the closed space, the exhaust hole is provided with a microporous membrane, and the microporous membrane is specially used for air to pass through and enter the gas pipe. According to the scheme, air is prevented from forming bubbles in the slurry, and the filling effect and the sealing effect of the hole sealing slurry are better.

Description

Technical Field

[0001] The utility model relates to the technical field of hole sealers, in particular to a gas extraction hole sealer. Background Art

[0002] Drilling and gas extraction is the main technical means for coal mine gas disaster prevention and control, coalbed methane development and utilization. In coal mine gas extraction work, drilling sealing technology has always been a difficult problem restricting gas extraction. Currently, commonly used drilling sealing technologies include cement mortar sealing, polyurethane foam sealing, gas extraction plugger sealing, and pressurized expansion capsule sealing.

[0003] Referring to the prior art CN104343415A-gas extraction drilling hole injection expansion bag sealer, it includes two sealing bags for sealing coal seam drilling holes and gas extraction pipes, grouting pipes, and return grouting pipes passing through the inner cavity thereof, the sealing bags are arranged at intervals at both ends of the grouting pipes, and at least one closed space is formed in the coal seam drilling hole, the grouting pipes are provided with one-way bursting valves A on the passages in the sealing bags, and one-way bursting valves B are provided on the passages in the closed space, and the bursting pressure of the one-way bursting valve A is less than the bursting pressure of the one-way bursting valve B. The present invention provides sealing bags and bursting valves, and successively injects sealing slurry into the sealing bags and the sealed space between the sealing bags, and the sealing bags expand rapidly, and finally the bags and the hole wall and the slurry in the sealed space are tightly combined. However, in actual applications, it is found that due to the presence of air in the confined space, when the slurry fills the confined space, the air cannot be discharged, and the air forms a large number of bubbles in the slurry, which affects the filling effect of the sealing slurry and also affects the sealing performance.

[0004] To this end, referring to the prior art, a self-testing mining sealer-202320451817.5 and a double-bag quick sealing device-CN203962028U, the above prior art both set an exhaust pipe for exhaust, and set a pressure valve in the exhaust pipe. When the sealing slurry in the closed space is filled and reaches the set pressure of the pressure valve, the pressure valve opens to exhaust outward.

[0005] However, in this way, the slurry enters the pressure valve during the exhaust process. After the slurry solidifies, it forms a blockage inside the pressure valve, which makes cleaning more difficult and causes the pressure valve to be unable to be used a second time. On the other hand, after the sealing slurry in the closed space is filled, the pressure valve will not open for exhaust until the set pressure is reached, resulting in untimely air discharge. At this time, the air has entered the slurry to form bubbles, which will affect the filling and sealing effects of the sealing slurry. Utility Model Content

[0006] The utility model aims to provide a gas extraction hole sealer to solve the problem in the prior art that air is not discharged in time, thus affecting the filling effect and sealing effect of the hole sealing slurry.

[0007] In order to solve the above problems, the utility model provides the following technical solutions:

[0008] A gas extraction sealing device comprises at least two sealing bags, and also comprises a gas pipe and a grouting pipe which penetrate all the sealing bags, a closed space is formed between adjacent sealing bags, and the grouting pipe is provided with a bursting valve located in the closed space; the gas pipe is located above the grouting pipe, the gas pipe is provided with an exhaust hole located in the closed space, the exhaust hole is provided with a microporous membrane, and the microporous membrane is specially used for air to pass into the gas pipe.

[0009] The working principle and beneficial effects of the utility model:

[0010] This solution uses a microporous membrane to replace the pressure valve of the prior art to control exhaust. When in use, the sealer is inserted into the drilled hole of the coal seam, and pressurized grouting is performed through the grouting pipe. The sealing bag expands and seals the drilled hole after grouting, and a closed space is formed between adjacent sealing bags. Then the bursting valve is opened under the action of the grouting pressure, and the slurry is poured into the closed space. The gas pipe is located above the grouting pipe, and the gas pipe is provided with an exhaust hole, so that the exhaust hole is also located above the bursting valve. In the process of filling the closed space with the slurry, the air in the closed space is squeezed through the microporous membrane into the gas pipe and discharged outwardly. In addition, the micropores on the microporous membrane only allow air to pass through, while the slurry cannot pass through, so that the slurry cannot enter the gas pipe. After the sealing and exhaust are completed, the gas is extracted through the gas pipe.

[0011] The microporous membrane of this solution replaces the pressure valve in the prior art. The microporous membrane is cheap and easy to replace, and can effectively block mud from entering the gas pipe. Moreover, when the slurry is injected into a confined space, the air can be squeezed through the microporous membrane for exhaust without reaching a certain pressure. Therefore, the air is discharged more promptly, and the formation of bubbles in the slurry is prevented, and the filling and sealing effects of the sealing slurry are better.

[0012] Optimally, the number of the hole-sealing bags is 2. Using 2 hole-sealing bags can achieve a better blocking effect.

[0013] Optimally, the hole-sealing bag is specifically a rubber hole-sealing bag. The rubber hole-sealing bag is elastic and easy to deform, and can better seal the drilled hole.

[0014] Optimally, sleeves are fixedly sleeved at both ends of each sealing bag, and the gas pipe and the grouting pipe pass through the sleeves. This arrangement makes it convenient to place the sealing bag in the coal seam borehole.

[0015] Optimally, the discharge direction of the burst valve and the exhaust direction of the exhaust hole are opposite in the vertical direction. This setting can make the slurry discharge and exhaust directions opposite, and the air squeezed upward by the slurry is quickly discharged outward through the exhaust hole, thereby increasing the exhaust speed.

[0016] Optimally, the vent holes are close to the edge of the sealed bag. This optimized orientation ensures that no air is trapped in the enclosed space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure diagram of a gas extraction hole sealer is shown in FIG.

[0018] Figure 2 for Figure 1 Cross-section of the gas pipe;

[0019] Figure 3 for Figure 1 Schematic diagram of the internal mechanism located at the sealing bag. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods:

[0021] The reference numerals in the drawings of the specification include: bursting valve 1, grouting pipe 2, sealing bag 3, sleeve 4, coal seam 5, gas pipe 6, microporous membrane 7.

[0022] In the following statements, directional words such as "left", "right", "up", and "down" are all based on the directions shown in the diagram. In practice, if the corresponding structures are changed in the same direction based on the directions while keeping the relative positions unchanged, it will not affect the implementation of the plan.

[0023] Embodiment: A gas extraction hole sealer, such as Figure 1 , Figure 2 As shown, it includes two sealing bags 3, each of which has sleeves 4 fixedly sleeved at both ends, and the sealing bags 3 are made of rubber. Figure 3 As shown, it also includes a gas pipe 6 and a grouting pipe 2 that penetrate the sleeve 4 and are located inside the sealing bag 3. The gas pipe 6 and the grouting pipe 2 are fixedly connected to the sleeve 4. How the grouting pipe 2 grouts the sealing bag 3 is specifically referred to the prior art CN104343415A-Gas extraction drilling expansion bag sealer.

[0024] After the two sealing bags 3 are expanded by grouting, a closed space is formed between the two. The grouting pipe 2 is provided with a bursting valve 1 located in the closed space; the gas pipe 6 is located above the grouting pipe 2, and the gas pipe 6 is provided with an exhaust hole located in the closed space. The exhaust hole is fixed with a microporous membrane 7 (i.e., a membrane with multiple micropores evenly distributed). The micropore size of the microporous membrane 7 is 40 to 100 microns. At this aperture, air can pass through, but slurry cannot pass through.

[0025] This solution uses a microporous membrane 7 to replace the pressure valve of the prior art to control the exhaust, such as Figure 3As shown, when in use, the sealer is inserted into the borehole of the coal seam 5, and pressurized grouting is performed through the grouting pipe 2. After the grouting pipe 2 grouts the sealing bag 3, the sealing bag 3 expands to seal the borehole, and a closed space is formed between adjacent sealing bags 3. The bursting valve 1 is then opened under the action of the grouting pressure, and the slurry is poured into the closed space. The gas pipe 6 is located above the grouting pipe 2, and the gas pipe 6 is provided with an exhaust hole, so that the exhaust hole is also located above the bursting valve 1. In the process of filling the closed space with slurry, the air in the closed space is squeezed through the microporous membrane 7 into the gas pipe 6 and discharged outwardly. In addition, the microporous membrane 7 only allows air to pass through, but the slurry cannot pass through, so that the slurry cannot enter the gas pipe 6. After the sealing and exhaust are completed, the gas is extracted through the gas pipe 6.

[0026] The microporous membrane 7 of this solution replaces the pressure valve in the prior art. The microporous membrane 7 is cheap and easy to replace, and can effectively prevent mud from entering the gas pipe 6. Moreover, when the slurry is injected into a confined space, the air can be squeezed through the microporous membrane 7 for exhaust without reaching a certain pressure. Therefore, the air is discharged more timely, and the air is prevented from forming bubbles in the slurry, and the filling effect and sealing effect of the sealing slurry are better.

[0027] Optimally, the discharge direction of the bursting valve 1 and the exhaust direction of the exhaust hole are opposite in the vertical direction. In this embodiment, the discharge direction of the bursting valve 1 is vertically downward.

[0028] The standard parts used in the utility model can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

Claims

1. A gas extraction hole sealer, comprising at least two hole sealing bags, and also comprising a gas pipe and a grouting pipe penetrating all the hole sealing bags, wherein a closed space is formed between adjacent hole sealing bags, and the grouting pipe is provided with a bursting valve located in the closed space; characterized in that: The gas pipe is located above the grouting pipe. The gas pipe is provided with an exhaust hole located in a closed space. The exhaust hole is provided with a microporous membrane. The microporous membrane is specially used for air to pass into the gas pipe.

2. A gas extraction hole sealer according to claim 1, characterized in that: The number of the sealing bags is 2.

3. A gas extraction hole sealer according to claim 2, characterized in that: The sealing bag is specifically a rubber sealing bag.

4. A gas extraction hole sealer according to claim 3, characterized in that: Sleeves are fixedly sleeved at both ends of each sealing bag, and the gas pipe and the grouting pipe pass through the sleeves.

5. A gas extraction hole sealer according to any one of claims 1 to 4, characterized in that: The discharge direction of the bursting valve and the exhaust direction of the exhaust hole are opposite in the vertical direction.

6. A gas extraction hole sealer according to claim 5, characterized in that: The vent hole is close to the edge of the sealing bag.

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