A remote manually controlled three-way gas plugging device for coal mines

Abstract

The present invention discloses a remote manually controlled three-way gas plugging device for coal mines, which includes an extraction pipe, and a plugging plate reversing control device and a three-way gas plugging device installed at both ends of the extraction pipe; the plugging plate is hinged on the inner wall of the working chamber of the three-way gas plugging device, and the plugging plate is connected to the plugging plate reversing control device through a rope. By pulling the rope by the plugging plate reversing control device to control the switching of the plugging direction from the branch pipe to the main pipe, the opening of the branch pipe of the three-way gas plugging device and the blocking of the main air inlet pipe on one side of the goaf can be realized, the gas extraction in the goaf is blocked, and the gas extraction efficiency is improved. At the same time, when the supporting structure of the goaf is dismantled and the goaf collapses and buries the three-way gas plugging device, the extraction pipe in the goaf can still be sealed by operating the plugging plate reversing control device installed on the extraction pipe on one side of the coal mining face.

Description

Technical Field

[0001] The invention relates to the field of gas extraction, and in particular to a remote control device for opening and closing a pipe opening of a coal mine gas extraction tee pipe. Background Art

[0002] Comprehensive mining and excavation is currently the most commonly used form of coal mining. When gas is controlled in the coal mining face of the comprehensive mining area, an extraction pipe will be preset in the comprehensive mining tunnel, and a tee pipe will be set on the extraction pipe at a certain distance. The main pipe of the tee pipe is connected between the two extraction pipes, and the branch pipe is connected to the gas collecting pipe pre-buried in the coal wall. When the coal mining face is parallel to the position of the tee pipe, the branch pipe on the tee pipe is opened, and the extraction pump extracts the gas in the coal wall and the upper corner of the coal mining face through the extraction pipe and the gas collecting pipe. When the coal mining face continues to move forward to a certain distance, the gas in the goaf does not need to be extracted anymore, and the extraction pipe behind the tee pipe must be closed, otherwise it will affect the effect of gas extraction. And with the removal of the support structure of the goaf, the top of the tunnel will collapse and bury the extraction pipe. In the current technology, the extraction pipe plugging device in the goaf mostly uses butterfly valves, plugging plates or bags. Among them, the butterfly valve is easy to use, but when the goaf is buried, it cannot be plugged. When the plugging plate installed at the tee pipe needs to be manually removed from the branch pipe and fixed to the main pipe when the extraction pipe in the goaf needs to be blocked, it is time-consuming and labor-intensive, and the plugging plate cannot achieve automatic reversal. Although the bag-type plugging device can be used to block the extraction pipe in the goaf when it is buried, it requires grouting in the bag, which is a complicated process and wastes manpower and material costs. Summary of the invention

[0003] The technical problem to be solved by the present invention is: to provide a remote manually controlled three-way gas plugging device for coal mines to solve the problem that the prior art is time-consuming and labor-intensive when plugging the extraction pipe in the goaf, and that the plugging operation cannot be performed when the goaf is buried, thereby affecting the gas extraction effect.

[0004] The technical solution of the present invention is:

[0005] A remote manually controlled three-way gas plugging device for coal mines, comprising an extraction pipe and a three-way gas plugging device installed at the right end of the extraction pipe, the three-way gas plugging device comprising a working chamber, a main air intake pipe, a branch pipe and a main air return pipe, the working chamber is a rectangular parallelepiped structure, the main air intake pipe, the branch pipe and the main air return pipe are respectively welded on the outer surfaces of the left side, the top and the right side of the working chamber, and a plugging plate is hinged at the upper right corner of the inner surface of the working chamber; the bottom of the main air return pipe and the central inner surface of the plugging plate are respectively provided with a first pulley ear plate and a second pulley ear plate; a plugging plate reversing control device is installed at the left end of the extraction pipe; one end of the rope is fixed on the plugging plate reversing control device, and the other end is connected to the plugging plate after passing through the first pulley ear plate and the second pulley ear plate. By controlling the plugging plate reversing control device to tighten the rope, the rope pulls the plugging plate to rotate along the hinge point, and the branch pipe pipeline is opened, and the extraction pipe can extract the gas in the coal wall and the upper corner of the coal mining working face through the branch pipe. As the rope continues to shrink, the plugging plate is eventually pulled against the right inner surface of the working chamber, blocking the main air inlet pipe and the extraction pipeline in the goaf.

[0006] The blocking plate reversing control device includes a cylinder, a rotating shaft, a hoop and a movable handle; one end of the rope is fixed on the hoop; the hoop is fixedly installed on the rotating shaft; one end of the rotating shaft is movably installed at the bottom of the cylinder, and the other end passes through the top of the cylinder and is movably connected to the movable handle.

[0007] Two parallel mounted latch hole ear plates are arranged on the blocking plate on the left side of the second pulley ear plate; a latch seat is fixedly mounted on the inner wall of the working cavity on the left side of the latch hole ear plate; the rod body of the latch rod is installed in the latch hole ear plate, and one end is connected to the rope.

[0008] The rope is a rubber-coated steel wire rope.

[0009] A boss for limiting position is arranged in the middle of the latch rod, and the diameter of the boss is larger than the inner diameter of the latch hole of the latch hole ear plate; the distance from the boss to the ends on both sides of the latch rod is larger than the spacing between the two latch hole ear plates.

[0010] A circular hole for the rope to pass through is arranged on the cavity wall at the lower right corner of the working cavity, and the center of the circular hole is on the same horizontal line as the center of the roller of the first pulley ear plate.

[0011] Beneficial effects of the present invention:

[0012] A three-way gas plugging device for coal mines with remote manual control of the present invention hinges a plugging plate on the inner wall of the working chamber of the three-way gas plugging device, which can not only realize the opening of the branch pipe of the three-way gas plugging device, but also realize the plugging of the main air intake pipe on one side of the goaf, isolate the gas extraction in the goaf, and improve the gas extraction efficiency. At the same time, the plugging plate reversing control device of the present invention can control the switching of the plugging direction of the plugging plate through the rope installed inside. When the supporting structure of the goaf is dismantled and the goaf collapses and buries the three-way gas plugging device, it can still be operated by the plugging plate reversing control device installed on the extraction pipe on one side of the coal mining face to seal the extraction pipe in the goaf. Compared with the plugging method using a bag or a butterfly valve, the present device has a reliable structure, simple and effective operation, and can save a lot of manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the forward cross-sectional structure of the present invention;

[0014] Figure 2 It is a structural schematic diagram of the blocking plate reversing control device of the present invention;

[0015] Figure 3 It is a structural schematic diagram of the three-way gas blocking device of the present invention. DETAILED DESCRIPTION

[0016] like Figure 1 As shown, a three-way gas plugging device for coal mines with remote manual control includes an extraction pipe 2 and a three-way gas plugging device 3 installed at the right end of the extraction pipe 2, wherein the three-way gas plugging device 3 consists of a working chamber 31, a main air inlet pipe 33, a branch pipe 34 and a main air return pipe 35. The working chamber 31 is a rectangular parallelepiped structure, and the main air inlet pipe 33, the branch pipe 34 and the main air return pipe 35 are welded on the outer surfaces of the left side, the top and the right side of the working chamber 31, respectively. A plugging plate 32 is hinged at the upper right corner of the inner surface of the working chamber 31; during normal operation, the branch pipe 34 is in a closed state under the action of the plugging plate 32, and the gas in the goaf enters from the main air inlet pipe on the right side along the extraction pipe, and is discharged from the main air return pipe 35 on the left side into the extraction pipe 2, and is discharged to the ground collection station along the pipeline. When the goaf no longer needs to extract gas, the plugging plate 32 is simply pulled against the right inner surface of the working chamber 31 to block the main air inlet pipe 33, thereby blocking the extraction pipeline in the goaf and switching the blocking direction of the plugging plate.

[0017] The bottom of the main return air pipe 35 and the central inner surface of the plugging plate 32 are respectively provided with a first pulley lug 5 and a second pulley lug 6; the plugging plate reversing control device 1 is installed at the left return air end of the extraction pipe 2; one end of the rope 4 is fixed on the plugging plate reversing control device 1, and the other end passes through the first pulley lug 5 and the second pulley lug 6 and is connected to the plugging plate 32. When the coal mining face is parallel to the position of the three-way gas plugging device 3, by controlling the plugging plate reversing control device 1 to tighten the rope, the plugging plate 32 is pulled away from the top of the working chamber 31, and the branch pipe 34 can be opened, and the extraction pipe can extract the gas in the coal wall and the corner of the coal mining face through the branch pipe 34.

[0018] like Figure 2 As shown, the plugging plate reversing control device 1 includes a cylinder 11, a rotating shaft 13, a hoop 12 and a movable handle 14; one end of the rope 4 is fixed on the hoop 12; the hoop 12 is fixedly mounted on the rotating shaft 13; one end of the rotating shaft 13 is movably mounted at the bottom of the cylinder 11, and the other end passes through the top of the cylinder 11 and is movably connected to the movable handle 14. By rotating the movable handle 14, the hoop 12 mounted on the rotating shaft 13 is driven to rotate, and the hoop 12 winds the rope 4 around the rotating wheel of the hoop 12 to achieve the extension and retraction of the rope 4. In view of the fact that the inside of the extraction pipe 2 is a gas gathering area, the plugging plate reversing control device 1 cannot be electrically controlled to prevent the generation of electric sparks and gas explosions.

[0019] like Figure 3 As shown, two parallel bolt hole ear plates 36 are arranged on the blocking plate 32 on the left side of the second pulley ear plate 6; a bolt seat 37 is fixedly installed on the inner wall of the working chamber 31 on the left side of the bolt hole ear plate 36; the rod body of the bolt rod 38 is installed in the bolt hole ear plate 36, forming a set of locking structure. One end of the bolt rod 38 is connected to the rope 4, and the rope 4 is tightened to make the bolt rod 38 separate from the bolt seat 37. Under the action of gravity, the blocking plate falls along the hinge point at the upper right corner of the inner surface of the working chamber 31, and the branch pipe 34 is opened.

[0020] To ensure the durability of the rope 4, the rope 4 is a rubber-coated steel wire rope. Preferably, the rope 4 is a 304 stainless steel-coated transparent PVC steel wire rope provided by Shenzhen Chuanhui Steel Rope Co., Ltd.

[0021] like Figure 3 As shown, a boss for limiting position is provided in the middle of the latch rod 38. When installing the latch hole ear plate 36 and the latch rod 38, firstly insert both ends of the latch rod 38 into the latch hole ear plate 36, and then weld the latch hole ear plate 36 to the blocking plate 32. The diameter of the boss is larger than the inner diameter of the latch hole of the latch hole ear plate 36; the distance from the boss to the ends of both sides of the latch rod 38 is larger than the distance between the two latch hole ear plates 36, so as to prevent the latch rod from slipping out of the latch hole ear plates.

[0022] A circular hole 39 is provided on the wall at the lower right corner of the working chamber 31 for the rope 4 to pass through, and the center of the circular hole 39 is on the same horizontal line as the center of the roller of the first pulley lug 5. This prevents the rope 4 from being placed between the blocking plate 32 and the working chamber 31 when the blocking plate 32 is used to block the main air inlet pipe 33, thereby affecting the blocking effect, and also prevents the rope 4 from being clamped off.

Claims

1. A remote manually controlled three-way gas plugging device for a coal mine, comprising an extraction pipe (2) and a three-way gas plugging device (3) installed at the right end of the extraction pipe (2), the three-way gas plugging device (3) comprising a working chamber (31), a main air intake pipe (33), a branch pipe (34) and a main air return pipe (35), the working chamber (31) being a rectangular parallelepiped structure, the main air intake pipe (33), the branch pipe (34) and the main air return pipe (35) being welded to the outer surfaces of the left side, the top and the right side of the working chamber (31), respectively, characterized in that: A plugging plate (32) is hingedly connected at the upper right corner of the inner surface of the working chamber (31); a first pulley ear plate (5) and a second pulley ear plate (6) are respectively arranged at the bottom of the main air return pipe (35) and the central inner surface of the plugging plate (32); a plugging plate reversing control device (1) is installed at the left end of the extraction pipe (2); one end of a rope (4) is fixed to the plugging plate reversing control device (1), and the other end passes through the first pulley ear plate (5) and the second pulley ear plate (6) and is connected to the plugging plate (32); the plugging plate reversing control device (1) comprises a cylinder (11), a rotating shaft (13), a hoop (12) and a movable handle (14); one end of the rope (4) is fixed to the hoop (12) The hoop (12) is fixedly mounted on the rotating shaft (13); one end of the rotating shaft (13) is movably mounted on the bottom of the cylinder (11), and the other end passes through the top of the cylinder (11) and is movably connected to the movable handle (14); two parallel mounted latch hole ear plates (36) are arranged on the blocking plate (32) on the left side of the second pulley ear plate (6); a latch seat (37) is fixedly mounted on the inner wall of the working chamber (31) on the left side of the latch hole ear plate (36); the rod body of the latch rod (38) is mounted in the latch hole ear plate (36), and one end of the latch rod (38) is connected to the rope (4), so that the latch hole ear plate (36), the latch seat (37) and the latch rod (38) form a set of locking structure.

2. A remote manually controlled three-way gas plugging device for coal mines according to claim 1, characterized in that: The rope (4) is a rubber-coated steel wire rope.

3. A remote manually controlled three-way gas plugging device for coal mines according to claim 1, characterized in that: A boss for limiting position is arranged in the middle of the latch rod (38), the diameter of which is larger than the inner diameter of the latch hole of the latch hole ear plate (36); and the distance from the boss to the ends of both sides of the latch rod (38) is larger than the distance between the two latch hole ear plates (36).

4. A remote manually controlled three-way gas plugging device for coal mines according to claim 1, characterized in that: A circular hole (39) for the rope (4) to pass through is provided on the cavity wall at the lower right corner of the working cavity (31), and the center of the circular hole (39) is on the same horizontal line as the center of the roller of the first pulley lug (5).

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