Upper corner gas extraction valve

Abstract

The utility model provides an upper corner gas extraction valve which comprises a shell. The upper end, the left side and the right side of the shell are fixedly connected with an upper side air inlet pipe, a left side air inlet pipe, an air outlet pipe and the shell which are communicated with the interior of the shell respectively, the left side air inlet pipe extends into the shell, an opening in the shell is machined into an upward bevel opening, the inner side wall, connected with the left side air inlet pipe, of the shell is further hinged to one end of a sealing plate, the bevel opening is covered with the end face of the sealing plate, and the sealing plate is connected with the shell. The other end of the sealing plate is connected with a steel wire rope, and the other end of the steel wire rope sequentially penetrates through the pulley B and the pulley A and extends out of the opening of the air outlet pipe. The gravity of the sealing plate can act on an inclined opening in the air inlet pipe, so that the sealing performance between the air inlet and the sealing plate is ensured; the rotation of the rotating shaft for tightening the steel wire rope is limited through the ratchet wheel, so that the steel wire rope cannot be loosened under the pulling of the gravity of the sealing plate in the sealing process of the sealing plate and the upper air inlet, and the sealing effect of the sealing plate and the upper air inlet is ensured.

Description

Technical Field

[0001] The utility model relates to an upper corner gas extraction valve. Background Art

[0002] In the process of coal mining, the upper corner is the key area of ​​gas accumulation, and its gas extraction efficiency is directly related to the safety of the entire mine. Traditional gas extraction devices often have problems such as low extraction efficiency, high energy consumption, and difficult maintenance, which makes it difficult to meet the growing demand for safe production.

[0003] In recent years, with the continuous advancement of science and technology, the emergence of new materials and advanced technologies has provided possibilities for the improvement and innovation of gas extraction devices. At present, domestic and foreign researchers have achieved a series of research results in gas extraction technology, but there are still many challenges and shortcomings. For example, a mining gas barrier disclosed in publication number CN219754580U uses a steel wire rope to tighten the sealing plate to seal the gas outlet at the top. Since the rotating shaft of the rotating steel wire rope does not use a limit device, the gravity of the sealing plate itself will pull the steel wire rope, and the sealing plate will slowly fall, resulting in a decrease in the sealing between the sealing plate and the upper gas outlet, making the gas extraction efficiency poor. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an upper corner gas extraction valve.

[0005] The utility model is realized through the following technical solutions.

[0006] The utility model provides an upper corner gas extraction valve, including its shell; the upper end and left and right sides of the shell are respectively fixed with an upper air inlet pipe, a left air inlet pipe and an air outlet pipe connected with the interior thereof, the shell, the left air inlet pipe extends into the shell, and the opening in the shell is processed into an upward oblique opening, a sealing plate covering the oblique opening is also hinged on the inner side wall connected to the left air inlet pipe, the other end of the sealing plate is connected to a steel wire rope, a pulley B is also installed on the upper end of the side wall connected to the air outlet pipe, a pulley A is installed on the bottom of the air outlet pipe, the other end of the steel wire rope passes through pulley B and pulley A in sequence and extends out of the opening of the air outlet pipe.

[0007] A pulley is also installed in the left air inlet duct, and the pulley is movably installed in the left air inlet duct through a rotating shaft. Both ends of the rotating shaft are hinged on the side wall of the left air inlet duct and extend out of the left air inlet duct. A ratchet is also fixedly installed on any end of the rotating shaft extending out of the left air inlet duct, and a control wrench is also installed on the end of the rotating shaft. The ratchet on the ratchet cooperates with a pawl, and the pawl is hinged on a ratchet clamping plate, and the ratchet clamping plate is fixed on the side wall of the shell.

[0008] The pawl is "V"-shaped, and its outer end at the bend is hinged on the ratchet clamp. The inner end of the bend and the ratchet clamp are processed with the same through holes. The pin shaft passes through the through hole to lock the pawl. One end of the pawl is processed with an outward-bending claw, and the other end is processed into a long rod.

[0009] The upper air inlet pipe, the left air inlet pipe and the air outlet pipe are respectively installed with an upper connecting flange, a flexible flange and an air outlet flexible flange, and the ends of the left air inlet pipe and the air outlet pipe are also respectively installed with an air inlet stopper and an air outlet stopper.

[0010] A drainage pipe communicating with the interior of the shell is also installed at the bottom of any side wall of the shell.

[0011] A through hole is processed on one side wall of the front and rear sides of the shell, and an observation hole cover plate is installed on the through hole.

[0012] The control wrench is "L" shaped.

[0013] The pulley A and the pulley B are both double-row pulleys.

[0014] The beneficial effects of the utility model are: the gravity of the sealing plate can act on the inclined opening inside the air inlet pipe, thereby ensuring the sealing between the air inlet and the sealing plate; the rotating shaft of the tightening wire rope is limited in rotation by the ratchet wheel, thereby ensuring that during the process of forming a seal between the sealing plate and the upper air inlet, the wire rope will not loosen under the pull of the gravity of the sealing plate, thereby ensuring the sealing effect between the sealing plate and the upper air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view structural schematic diagram of the utility model;

[0016] Figure 2 It is a schematic diagram of the top view structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the ratchet and pawl structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the connection structure between the rope wheel and the steel wire rope of the utility model;

[0019] In the figure: 1-wire rope, 2-pulley A, 3-air outlet stop, 4-air outlet pipe, 5-air outlet flexible flange, 6-housing, 7-pulley B, 8-upper air inlet pipe, 9-upper connecting flange, 10-observation hole cover, 11-sealing plate, 12-sealing plate connecting seat, 13-left air inlet pipe, 14-flexible flange, 15-air inlet stop, 16-pawl, 17-ratchet, 18-control wrench, 19-ratchet clamp, 20-pin shaft, 21-opening pin, 22-rotating shaft, 23-pulley, 24-drain pipe, 25-gas pipe. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further described below, but the scope of protection required is not limited to the description.

[0021] An upper corner gas extraction valve includes a shell 6; the upper end and left and right sides of the shell 6 are respectively fixed with an upper air inlet pipe 8, a left air inlet pipe 13, and an air outlet pipe 4 connected to the interior thereof, the shell 6, the left air inlet pipe 13 extends into the shell 6, and the opening in the shell 6 is processed into an upward oblique opening, and a sealing plate 11 covering the oblique opening is also hinged on the inner side wall where the shell 6 is connected to the left air inlet pipe 13, and the other end of the sealing plate 11 is connected to a steel wire rope 1, a pulley B7 is also installed on the upper end of the side wall connected to the air outlet pipe 4, a pulley A2 is installed at the bottom of the air outlet pipe 4, and the other end of the steel wire rope 1 passes through the pulley B7 and the pulley A2 in sequence and extends out of the opening of the air outlet pipe 4.

[0022] A pulley 23 is also installed in the left air inlet pipe 13, and the pulley 23 is movably installed in the left air inlet pipe 13 through a rotating shaft 22. Both ends of the rotating shaft 22 are hinged on the side wall of the left air inlet pipe 13 and extend out of the left air inlet pipe 13. A ratchet 17 is also fixedly installed on any end of the rotating shaft 22 extending out of the left air inlet pipe 13, and a control wrench 18 is also installed at the end of the rotating shaft. The ratchet on the ratchet 17 cooperates with the pawl 16, and the pawl 16 is hinged on the ratchet clamp 19, and the ratchet clamp 19 is fixed on the side wall of the shell 6.

[0023] The pawl 1 housing 6 is "V"-shaped, and its outer end at the bend is hinged on the ratchet clamp 19. The inner end of the bend and the ratchet clamp 19 are processed with the same through holes, and the pin 20 passes through the through hole to lock the pawl 1 housing 6. One end of the pawl 1 housing 6 is processed with an outward-bending claw, and the other end is processed into a long rod.

[0024] The upper air inlet pipe 8, the left air inlet pipe 13 and the air outlet pipe 4 are respectively installed with an upper connecting flange 9, a flexible flange 14 and an air outlet flexible flange 5. The ends of the left air inlet pipe 13 and the air outlet pipe 4 are also respectively installed with an air inlet stop 15 and an air outlet stop 3.

[0025] A drainage pipe 24 communicating with the interior of the housing 6 is also installed at the bottom of any side wall of the housing 6 .

[0026] A through hole is processed on one side wall of the front and rear sides of the housing 6, and an observation hole cover plate 10 is installed on the through hole.

[0027] The control wrench 18 is "L" shaped.

[0028] The pulley A2 and the pulley B7 are both double-row pulleys.

[0029] The extraction valve of this application requires at least two to be used together. The device is installed on the low-negative pressure gas extraction pipe of the return airway of the underground coal mining working face. One is installed every 50 meters or so. The right flange is connected to the gas extraction pipe, the left flange is connected to the gas pipe in the goaf, and the upper flange is connected to the upper corner gas pipe or the gas pipe in the high-position drilling field of the return airway. Figure 4 As shown, the end of the steel wire rope of the left extraction valve is wound on the rope wheel of the right extraction valve. When the upper corner gas exceeds the limit or is too high and needs to be extracted, the ratchet 16 is operated to loosen the ratchet 17, and the steel wire rope 1 on the right extraction valve is loosened from the rope wheel 23. The sealing plate 11 in the left extraction valve closes the left air inlet pipe 13 downward by its own weight. The left air inlet pipe 13 is an oblique mouth. The left air inlet pipe is closed, thereby opening the upper air inlet 8, and focusing on extracting the upper corner gas; when the upper corner gas is not high, the upper air inlet pipe 8 is closed, and the left air inlet pipe 13 is opened, focusing on extracting the old empty area gas. The upper left air inlet pipe 8 and the edge of the left air inlet pipe 13 are sealed with a sealing strip. The sealing effect is better when the sealing plate 11 is sealed. The use of this device is convenient for gas control in coal mining working faces. When it is necessary to switch the air inlet of the left extraction valve, the driving rope wheel on the right extraction valve is reversed to make the sealing plate contact the two air inlets respectively.

Claims

1. An upper corner gas extraction valve, including a housing (6), characterized in that: The upper end and left and right sides of the shell (6) are respectively fixedly connected with an upper air inlet pipe (8), a left air inlet pipe (13) and an air outlet pipe (4) which are in communication with the interior thereof. The shell (6) has an upper air inlet pipe (8), a left air inlet pipe (13) extending into the shell (6), and an opening in the shell (6) being processed into an upwardly inclined opening. A sealing plate (11) covering the inclined opening is also hingedly connected to the inner side wall of the shell (6) connected to the left air inlet pipe (13). The other end of the sealing plate (11) is connected to a steel wire rope (1). A pulley B (7) is also installed at the upper end of the side wall connected to the air outlet pipe (4). A pulley A (2) is installed at the bottom of the air outlet pipe (4). The other end of the steel wire rope (1) passes through the pulley B (7) and the pulley A (2) in sequence and extends out of the opening of the air outlet pipe (4).

2. The upper corner gas extraction valve according to claim 1, characterized in that: A rope wheel (23) is also installed in the left air inlet pipe (13). The rope wheel (23) is movably installed in the left air inlet pipe (13) through a rotating shaft (22). Both ends of the rotating shaft (22) are hinged on the side wall of the left air inlet pipe (13) and extend out of the left air inlet pipe (13). A ratchet (17) is also fixedly installed on any end of the rotating shaft (22) extending out of the left air inlet pipe (13), and a control wrench (18) is also installed at the end of the rotating shaft. The ratchet teeth on the ratchet (17) cooperate with the pawl (16). The pawl (16) is hinged on a ratchet clamp (19), and the ratchet clamp (19) is fixed on the side wall of the housing (6).

3. The upper corner gas extraction valve according to claim 2, characterized in that: The ratchet pawl (16) is V-shaped, and the outer end of the bend is hinged on the ratchet clamp (19). The inner end of the bend and the ratchet clamp (19) are processed with the same through hole, and the pin (20) passes through the through hole to lock the ratchet pawl (16). One end of the ratchet pawl (16) is processed with a claw bent outward, and the other end is processed into a long rod.

4. The upper corner gas extraction valve according to claim 1, characterized in that: The upper air inlet pipe (8), the left air inlet pipe (13) and the air outlet pipe (4) are respectively installed with an upper connecting flange (9), a flexible flange (14) and an air outlet flexible flange (5); the ends of the left air inlet pipe (13) and the air outlet pipe (4) are also respectively installed with an air inlet stopper (15) and an air outlet stopper (3).

5. The upper corner gas extraction valve according to claim 1, characterized in that: A drainage pipe (24) communicating with the interior of the housing (6) is also installed at the bottom of any side wall of the housing (6).

6. The upper corner gas extraction valve according to claim 1, characterized in that: A through hole is processed on one side wall of the front and rear sides of the housing (6), and an observation hole cover plate (10) is installed on the through hole.

7. The upper corner gas extraction valve according to claim 2, characterized in that: The control wrench (18) is L-shaped.

8. The upper corner gas extraction valve according to claim 1, characterized in that: The pulley A (2) and the pulley B (7) are both double-row pulleys.

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