Gas drainage hole packer

Abstract

The utility model discloses a gas drainage hole packer which comprises a plurality of pipe sections, a front bag and a rear bag, each pipe section comprises an inner pipe and an outer pipe which are coaxially arranged, the plurality of pipe sections are detachably connected in sequence, the plurality of inner pipes are connected in sequence to form a grouting pipe, and the plurality of outer pipes are connected in sequence to form a gas drainage pipe; the front bag and the rear bag are correspondingly and fixedly arranged on the outer walls of the front section outer pipe and the rear section outer pipe in a sleeving mode respectively, one-way grout outlets correspondingly leading to the front bag and the rear bag are formed in the pipe walls of the front section inner pipe and the rear section inner pipe, a grouting opening connected with an external grouting pump is formed in the pipe wall of the tail section inner pipe, and a grout outlet leading to the outside is formed in the pipe wall of the middle section inner pipe and provided with an explosion valve. The device is not limited by the hole diameter of a drilled hole in a coal wall, and can be smoothly pushed into the drilled hole, so that the field operation is greatly facilitated; in addition, the length of the hole packer can be adaptively adjusted according to the depth of field drilling, the universality of the hole packer is improved, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to mining facilities technical field, concretely is a gas extraction and drainage hole sealing device. BACKGROUND

[0002] The gas extraction and drainage hole sealing device is a device for extracting and draining gas in coal mines and the like, and its main functions include reducing the gas content in coal seams, extracting and draining gas, wetting coal bodies, and reducing dust, etc. Its working principle is: the hole sealing device (pipe fitting) is pushed into a drill hole on a coal wall, grouting is injected into forward and rear pockets to make the forward and rear pockets expand to seal the drill hole on the coal wall, and then a gas extraction and drainage pump connected with a gas extraction and drainage pipe extracts and drains gas.

[0003] The Chinese utility model patent with publication number CN221590942U provides a mine hole sealing device, and from the disclosed content, it can be known that it mainly comprises two parallel pipelines, namely a grouting pipe and a gas extraction and drainage pipe, two pockets are fixedly sleeved on the front and rear ends of the two pipelines, and the parallel two pipelines are not easy to be pushed into the drill hole due to the aperture of the drill hole on the coal wall, which causes certain difficulty in on-site operation; in addition, the depth of the drill hole is not the same, so that the length of the hole sealing device is poor in universality, and different lengths of hole sealing devices need to be configured, thereby increasing the cost. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the defects and deficiencies in the prior art, and provides a gas extraction and drainage hole sealing device, which is not limited by the aperture of the drill hole on the coal wall, can be smoothly pushed into the drill hole, and is convenient for on-site operation; in addition, the length of the hole sealing device can be adaptively adjusted according to the depth of the drill hole on site, so as to improve the universality of the hole sealing device and reduce the cost.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A gas extraction and drainage hole sealing device comprises a plurality of pipe segments, a forward pocket and a rear pocket, characterized in that: each pipe segment comprises an inner pipe and an outer pipe arranged coaxially, the plurality of pipe segments are detachably connected in sequence, the plurality of inner pipes are connected in sequence to form a grouting pipe, and the plurality of outer pipes are connected in sequence to form a gas extraction and drainage pipe; the forward pocket and the rear pocket are fixedly sleeved on the outer wall of the outer pipe of the front segment and the rear segment respectively, the pipe wall of the inner pipe of the front segment and the rear segment is provided with a one-way grout outlet corresponding to the forward pocket and the rear pocket, the pipe wall of the inner pipe of the last segment is provided with a grout outlet connected with an external grouting pump, and the pipe wall of the inner pipe of the middle segment is provided with a grout outlet connected with an external grouting pump and is provided with a blasting valve.

[0007] Further, a plurality of connecting ribs extending in the radial direction are integrally connected between the outer wall of the inner pipe and the inner wall of the outer pipe.

[0008] Further, one end of the inner tube is provided with a first diameter expansion section, and an inner diameter of the first diameter expansion section is slightly larger than an outer diameter of the inner tube.

[0009] Further, one end of the outer tube is provided with a second diameter expansion section, an inner wall of the second diameter expansion section is provided with an inner thread, the other end of the outer tube is provided with an outer thread section matched with the inner thread, the outer thread section is screwed into the second diameter expansion section adjacent to the outer thread section, and the first diameter expansion section is inserted into the other end of the inner tube adjacent to the first diameter expansion section.

[0010] Further, two ends of the front and rear bag are respectively fixed on the outer wall of the outer tube of the front and rear sections through pipe clamps.

[0011] Further, the pipe wall of one section of the middle section is provided with a water and gas return hole and wrapped with filter cloth.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] The utility model discloses a plurality of pipe sections, each pipe section includes coaxially arranged inner tube and outer tube, and the inner tube can be connected to form a grouting pipe, and the outer tube can be connected to form a gas drainage pipe, which can be smoothly pushed into the borehole, greatly facilitating the on-site operation. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the structure explosion map of the utility model.

[0015] Figure 2 It is the local structure schematic of the utility model Figure One .

[0016] Figure 3 It is the local structure schematic of the utility model Figure Two .

[0017] Figure 4 It is the local structure schematic of the utility model Figure Three .

[0018] Figure 5 It is the local structure schematic of the utility model Figure Four .

[0019] Figure 6 It is the local structure schematic of the utility model Figure Five . DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0021] Referring to Figures 1-6 A gas drainage hole sealing device comprises a plurality of pipe sections 1, a front bag 2 and a rear bag 3, each pipe section 1 comprises an inner pipe 4 and an outer pipe 5 arranged coaxially, the plurality of pipe sections 1 are detachably connected in sequence, the plurality of inner pipes 4 are connected in sequence to form a grouting pipe 6, and the plurality of outer pipes 5 are connected in sequence to form a gas drainage pipe 7; the front bag 2 and the rear bag 3 are respectively fixedly sleeved on the outer walls of the outer pipes 5 of the front section and the rear section, the pipe walls of the inner pipes 4 of the front section and the rear section are each provided with a one-way grouting outlet 8 corresponding to the front bag 2 and the rear bag 3, the pipe wall of the inner pipe 4 of the last section is provided with a grouting outlet 9 connected with an external grouting pump, and the pipe wall of the inner pipe 4 of the middle section is provided with a grouting outlet connected with the outside and is provided with a blasting valve 10.

[0022] In the utility model, the outer wall of the inner pipe 4 and the inner wall of the outer pipe 5 are integrally connected with a plurality of connecting ribs 11 extending in the radial direction, so as to fix the inner pipe 4 in the inner part of the outer pipe 5 and make the inner pipe 4 and the outer pipe 5 keep coaxial.

[0023] In the utility model, one end of the inner pipe 4 is provided with a first diameter expansion section 12, and the inner diameter of the first diameter expansion section 12 is slightly larger than the outer diameter of the inner pipe 4.

[0024] In the utility model, one end of the outer pipe 5 is provided with a second diameter expansion section 13, the inner wall of the second diameter expansion section 13 is provided with an internal thread 14, and the other end of the outer pipe 5 is provided with an external thread section 15 matched with the internal thread 14.

[0025] Therefore, when assembling, the external thread 15 section is screwed into the second diameter expansion section 13 adjacent thereto, so as to realize the connection of the plurality of outer pipes 5 to form the gas drainage pipe 7; meanwhile, the first diameter expansion section 12 is inserted into the other end of the inner pipe 4 adjacent thereto, so as to realize the connection of the plurality of inner pipes 4 to form the grouting pipe 6.

[0026] In the utility model, the two ends of the front bag 2 and the rear bag 3 are respectively fixed on the outer walls of the outer pipes 5 of the front section and the rear section through pipe clamps 16, so as to realize the fixing and sleeving of the front bag 2 and the rear bag 3 on the outer walls of the outer pipes 5 of the front section and the rear section.

[0027] In the utility model, the pipe wall of the outer pipe 5 of the middle section is provided with a water and gas return hole 17 and is wrapped with filter cloth 18.

[0028] Thus, when grouting in the space between the front bag 2 and the rear bag 3, the excess air and water can be discharged into the gas drainage pipe 7 through the water return hole and the air return hole 17, and the slurry is intercepted by the filter cloth 18, so that the space is quickly filled with the slurry.

[0029] The utility model will be further described below in combination with the drawings:

[0030] In the initial state, the front bag 2 and the rear bag 3 are in the contracted state.

[0031] In use, a proper number of pipe sections 1 is selected according to the depth of the drill hole on the coal wall, and then the outer thread 15 is screwed into the second diameter expansion section 13 adjacent thereto, so as to realize the connection of the outer pipes 5 to form the gas drainage pipe 7; at the same time, the first diameter expansion section 12 is inserted into the other end of the inner pipe 4 adjacent thereto, so as to realize the connection of the inner pipes 4 to form the grouting pipe 6.

[0032] Then, the gas drainage hole sealing device of the utility model is pushed into the drill hole on the coal wall, so that the end of the gas drainage pipe 7 is exposed.

[0033] Then, the end of the gas drainage pipe 7 is connected to the gas drainage pump through the pipeline, and the grouting pipe 9 is connected to the grouting pump through the pipeline.

[0034] Then, the grouting pump is started, and the slurry (concrete) is injected into the grouting pipe 6 through the grouting nozzle 9, and the slurry is injected into the front bag 2 and the rear bag 3 through the one-way slurry outlet 8, respectively, and the front bag 2 and the rear bag 3 gradually expand until the drill hole is sealed.

[0035] With the gradual increase of the pressure, when the pressure exceeds the pressure threshold of the burst valve 10, the burst valve 10 bursts, the slurry outlet is connected, and the slurry is injected into the space between the front bag 2 and the rear bag 3 through the slurry outlet, and gradually fills the space, and the drill hole is sealed again.

[0036] After the slurry solidifies, the gas drainage pump is started, and the gas is drained.

[0037] Although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be properly combined to form other embodiments that those skilled in the art can understand.

[0038] Therefore, the above description is only the preferred embodiment of the present application, and is not intended to limit the scope of the present application; that is, any equivalent transformation made within the scope of the claims of the present application is within the protection scope of the claims of the present application.

Claims

1. A gas drainage hole sealing device comprising a plurality of pipe sections, a front pocket and a rear pocket, characterized in that: Each pipe section comprises an inner pipe and an outer pipe arranged coaxially, the pipe sections are detachably connected in sequence, the inner pipes are connected in sequence to form a grouting pipe, and the outer pipes are connected in sequence to form a gas drainage pipe; the front and rear bags are respectively fixed on the outer walls of the outer pipes of the front and rear sections, the inner pipes of the front and rear sections are respectively provided with one-way grouting outlets corresponding to the front and rear bags, the inner pipe of the last section is provided with a grouting outlet connected with an external grouting pump, and the inner pipe of the middle section is provided with a grouting outlet connected with an external explosion valve.

2. A gas drainage hole packer according to claim 1, wherein: The outer wall of the inner pipe and the inner wall of the outer pipe are integrally connected with a plurality of connecting ribs extending in the radial direction.

3. A gas drainage hole packer according to claim 1, wherein: One end of the inner pipe is provided with a first diameter expansion section, and the inner diameter of the first diameter expansion section is greater than the outer diameter of the inner pipe.

4. A gas drainage hole packer according to claim 3, wherein: One end of the outer pipe is provided with a second diameter expansion section, the inner wall of the second diameter expansion section is provided with an internal thread, the other end of the outer pipe is provided with an external thread section matched with the internal thread, the external thread section is screwed into the second diameter expansion section adjacent thereto, and the first diameter expansion section is inserted into the other end of the inner pipe adjacent thereto.

5. The gas drainage hole packer of claim 1, wherein: Both ends of the front and rear bags are respectively fixed on the outer walls of the outer pipes of the front and rear sections by pipe clamps.

6. A gas drainage hole packer according to claim 1, wherein: The pipe wall of one section of the outer pipe of the middle section is provided with a water and gas return hole and wrapped with a filter cloth.

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