Coal mine underground ventilation device

Abstract

A coal mine underground ventilation device comprises a three-way pipe body, the three-way pipe body comprises a main pipe body and an air supply pipe, the air supply pipe is communicated with the middle of the main pipe body, and the front end and the rear end of the main pipe body are an air inlet end and an air outlet end respectively; an air outlet device for driving airflow to flow from the air supply pipe and the air inlet end to the air outlet end is arranged at the air outlet end; a filtering device for filtering underground air is arranged at the air inlet end; the three-way type structure is arranged, the two functions of air inlet and dust removal can be taken into consideration, the two functions act simultaneously, independent dust removal equipment does not need to be additionally arranged, the cost is saved, first-step dust removal is carried out in a spraying mode, the dust removal effect is effectively improved, the humidity in air can be improved, and the dust removal effect is improved. And a certain effect of reducing the underground temperature is achieved, so that the working environment is more comfortable.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine ventilation equipment, and more specifically to a ventilation device for coal mines underground. Background Art

[0002] The mine ventilation system is a key component to ensure the safe and efficient operation of coal mines. A good ventilation system can remove harmful gases, dust, and heat, provide fresh air, and safeguard the health and safety of miners. It mainly consists of structures such as main ventilation fans, local ventilation fans, air duct systems, air doors, air bridges, airtight walls, and air measurement stations. Among them, the main ventilation fan is the core equipment of the mine ventilation system and is usually installed at the wellhead or in the shaft. The main ventilation fan ensures the air circulation inside the mine through forced air supply and exhaust, sends fresh air from the ground into the mine, provides the oxygen required for miners to breathe, and discharges harmful gases such as carbon dioxide and methane inside the mine through forced exhaust, safeguarding the health and safety of miners; local ventilation fans are used in local areas inside the mine, especially in working faces and roadways. They are usually installed at key positions underground to ensure the air circulation in these areas. In each working face and roadway of the mine, local ventilation fans provide the required fresh air to ensure that miners breathe clean air during operation. Local ventilation fans strengthen local ventilation and timely remove the dust and smoke generated during mine operations, safeguarding the health of miners.

[0003] Among them, one end of the local ventilation fan takes in air and the other end discharges air, and it can only perform one function, such as discharging air or taking in air. However, there is also a large amount of dust and smoke in the air intake roadway of the mine. The dust at the air outlet will be blown away by the wind, but the dust behind the air outlet is relatively difficult to handle. Summary of the Invention

[0004] One advantage of the utility model is to provide a ventilation device for coal mines underground, which is provided with a tee structure and can take into account the two functions of air intake and dust removal, and the two functions act simultaneously, without the need to additionally set up a separate dust removal device, saving costs.

[0005] One advantage of the utility model is to provide a ventilation device for coal mines underground, which performs the first step of dust removal by spraying. This not only effectively improves the dust removal effect, but also increases the humidity in the air, has a certain effect on reducing the underground temperature, and makes the working environment more comfortable.

[0006] To achieve at least one of the above advantages of the utility model, the utility model provides a ventilation device for coal mines underground, including a tee-shaped pipe body. The tee-shaped pipe body includes a main pipe body and a ventilation pipe. The ventilation pipe is connected to the middle of the main pipe body. The front and rear ends of the main pipe body are respectively an air intake end and an air outlet end;

[0007] An air outlet device for driving air flow from the air supply pipe and the air inlet end to the air outlet end is provided at the air outlet end;

[0008] A filtering device for filtering the underground air is provided at the air inlet end.

[0009] According to an embodiment of the present utility model, the air outlet device includes a bracket and an explosion-proof motor. The explosion-proof motor is installed on the inner side surface of the air outlet end through the bracket. The output shaft of the explosion-proof motor is connected with a fan blade, and the air flow direction of the fan blade is from the air supply pipe and the air inlet end to the air outlet end.

[0010] According to an embodiment of the present utility model, a net for protection is provided at the air outlet end, and the net is located outside the fan blade.

[0011] According to an embodiment of the present utility model, the filtering device includes a coarse filter screen, a spray structure, a dust collector, and a filter screen arranged in sequence from outside to inside. The underground air with dust and mist enters the air inlet end from the outside, and after passing through the coarse filter screen, the spray structure, the dust collector, and the filter screen in sequence, it converges with the clean air at the air supply pipe and is discharged from the air outlet end.

[0012] According to an embodiment of the present utility model, a packing layer for improving the combination rate of the underground air and water mist is arranged on the inner side surface of the coarse filter screen.

[0013] According to an embodiment of the present utility model, the spray structure includes a water spray pipe arranged inside the main pipe body, and a plurality of nozzles facing the coarse filter screen are arranged on the water spray pipe;

[0014] A water tank, a connecting pipe, and a water pump are arranged outside the main pipe body. The water tank is communicated with the water spray pipe through the connecting pipe and the water pump;

[0015] A liquid level sensor for detecting the water level in the water tank is arranged on the water tank.

[0016] According to an embodiment of the present utility model, the dust collector includes a connecting rod and a plurality of corrugated plates, and the plurality of corrugated plates are fixedly installed inside the main pipe body through the connecting rod;

[0017] A cleaning door is hinged to the main pipe body in a manner that can be opened by a fan.

[0018] According to an embodiment of the present utility model, a Y-shaped pipe is communicated with the lower part of the main pipe body. The upper end of the Y-shaped pipe is communicated with the main pipe body, and the communication point is located below the dust collector;

[0019] The lower end of the Y-shaped pipe is communicated with a waste liquid tank, and a drain pipe is connected to one side of the waste liquid tank, and a valve is arranged on the drain pipe.

[0020] According to an embodiment of the present utility model, a wind guiding plate is arranged at the connection of the air supply pipe and the main pipe body. The wind guiding plate is an arc-shaped plate, and its air supply angle faces the air outlet end.

[0021] According to an embodiment of the present utility model, a support mechanism is further included. The support mechanism includes a bottom plate, two support pads are arranged at the lower part of the bottom plate, a support seat is arranged at the upper part of the bottom plate, and an arc-shaped support surface is arranged at the upper part of the support seat and is connected to the main pipe body through the arc-shaped support surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic cross-sectional structure diagram of the present utility model;

[0023] Figure 2 is a schematic structure diagram of the present utility model;

[0024] In the drawings: 1, support pad; 2, support seat; 3, bottom plate; 4, waste liquid tank; 5, drain pipe; 6, air inlet end; 7, connecting pipe; 8, water pump; 9, water tank; 10, air supply pipe; 11, air outlet end; 12, liquid level sensor; 13, bracket; 14, explosion-proof motor; 15, fan blade; 16, net; 17, air deflector; 18, filter screen; 19, dust collector; 20, water spray pipe; 21, coarse filter screen; 22, Y-shaped pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to make the purpose, technical solutions and advantages of the implementation of the present utility model clearer, the following will combine the attached drawings of the present utility model Figure 1 ~attached drawings Figure 2 to describe the present utility model in more detail.

[0026] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The following preferred embodiments are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other implementation schemes, deformation schemes, improvement schemes, equivalent schemes and other technical schemes without departing from the spirit and scope of the present utility model.

[0027] Those skilled in the art should understand that in the disclosure of the specification, the orientation or positional relationship indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0028] It will be understood that the term "a" should be construed as "at least one" or "one or more". That is, in one embodiment, the number of an element may be one, while in other embodiments, the number of the element may be multiple. The term "a" should not be construed as a limitation on the number.

[0029] The present utility model provides a ventilation device for underground coal mines, which includes a three-way pipe body. The three-way pipe body includes a main pipe body and an air supply pipe 10. The air supply pipe 10 is communicated with the middle part of the main pipe body. The front and rear ends of the main pipe body are respectively an air inlet end 6 and an air outlet end 11. An air outlet device for driving air to flow from the air supply pipe 10 and the air inlet end 6 to the air outlet end 11 is arranged at the air outlet end 11. A filtering device for filtering underground air is arranged at the air inlet end 6. The air outlet device includes a bracket 13 and an explosion-proof motor 14. The explosion-proof motor 14 is installed on the inner side surface of the air outlet end 11 through the bracket 13. The output shaft of the explosion-proof motor 14 is connected with a fan blade 15. The air flow direction of the fan blade 15 is from the air supply pipe 10 and the air inlet end 6 to the air outlet end 11. A blocking net 16 for protection is arranged at the air outlet end 11, and the blocking net 16 is located outside the fan blade 15. The filtering device includes a coarse filter screen 21, a spraying structure, a dust collector 19 and a filter screen 18 which are arranged in sequence from outside to inside. The underground air with dust and fog enters the air inlet end 6 from the outside, and after passing through the coarse filter screen 21, the spraying structure, the dust collector 19 and the filter screen 18 in sequence, it converges with the clean air at the air supply pipe 10 and is discharged from the air outlet end 11. A packing layer for improving the combination rate of underground air and water mist is arranged on the inner side surface of the coarse filter screen 21. The spraying structure includes a water spraying pipe 20 arranged inside the main pipe body, and a plurality of nozzles facing the coarse filter screen 21 are arranged on the water spraying pipe 20. A water tank 9, a connecting pipe 7 and a water pump 8 are arranged outside the main pipe body. The water tank 9 is communicated with the water spraying pipe 20 through the connecting pipe 7 and the water pump 8. A liquid level sensor 12 for detecting the water level in the water tank 9 is arranged on the water tank 9. The dust collector 19 includes a connecting rod and a plurality of corrugated plates, and the plurality of corrugated plates are fixedly installed inside the main pipe body through the connecting rod. A cleaning door is hinged to the main pipe body in a manner that can be opened as a fan. The lower part of the main pipe body is communicated with a Y-shaped pipe 22. The upper end of the Y-shaped pipe 22 is communicated with the main pipe body, and the communication point is located below the dust collector 19. The lower end of the Y-shaped pipe 22 is communicated with a waste liquid tank 4. One side of the waste liquid tank 4 is connected with a drain pipe 5, and a valve is arranged on the drain pipe 5. A wind guiding plate 17 is arranged at the connection part of the air supply pipe 10 and the main pipe body. The wind guiding plate 17 is an arc-shaped plate, and its air supply angle faces the air outlet end 11. It further includes a support mechanism. The support mechanism includes a bottom plate 3. Two support pads 1 are arranged at the lower part of the bottom plate 3. A support seat 2 is arranged at the upper part of the bottom plate 3. The upper part of the support seat 2 is provided with an arc-shaped support surface and is connected with the main pipe body through the arc-shaped support surface.

[0030] The first embodiment of the present utility model is as follows:

[0031] A mine underground ventilation device includes a three-way pipe body. The three-way pipe body includes a main pipe body and an air supply pipe 10. The air supply pipe 10 is connected to the middle of the main pipe body. The front and rear ends of the main pipe body are an air inlet end 6 and an air outlet end 11 respectively. An air outlet device for driving the air flow from the air supply pipe 10 and the air inlet end 6 to the air outlet end 11 is provided at the air outlet end 11. Fresh air from the outside is transported to the underground ventilation device through a main ventilator. At the same time, the air outlet device also drives the gas flow, so that the dusty air underground enters from the air inlet end 6 through the ejector effect and the negative pressure effect, and after being filtered, it is discharged from the air outlet end 11 together with the fresh air from the outside.

[0032] A filtering device for filtering the underground air is provided at the air inlet end 6. Double filtering is carried out through two methods of humidifying filtration and mechanical filtration, which ensures the filtering effect and at the same time increases the air humidity, and can reduce the underground temperature to a certain extent and improve the comfort.

[0033] The air outlet device includes a bracket 13 and an explosion-proof motor 14. The explosion-proof motor 14 is installed on the inner side surface of the air outlet end 11 through the bracket 13. The output shaft of the explosion-proof motor 14 is connected with a fan blade 15. The air flow direction of the fan blade 15 is from the air supply pipe 10 and the air inlet end 6 to the air outlet end 11. A retaining net 16 for protection is provided at the air outlet end 11. The retaining net 16 is located outside the fan blade 15. By setting the retaining net 16, external objects are prevented from entering to avoid damaging the fan blade 15, and at the same time, it can also prevent personnel from being accidentally injured.

[0034] The filtering device includes a coarse filter screen 21, a spray structure, a dust collector 19 and a filter screen 18 arranged in sequence from outside to inside. Among them, the filter screen 18 conducts mechanical filtration. On the one hand, the coarse filter screen 21 can filter large particles in advance. On the other hand, a filler layer is arranged on the inner side at the same time, and water mist is sprayed onto the filler layer. When the air passes through, the combination rate of the water mist and the air can be increased. The spray structure and the dust collector 19 conduct humidifying filtration. The dusty underground air enters from the outside into the air inlet end 6, and after passing through the coarse filter screen 21, the spray structure, the dust collector 19 and the filter screen 18 in sequence, it converges with the clean air at the air supply pipe 10 and is discharged from the air outlet end 11.

[0035] A water tank 9, a connecting pipe 7 and a water pump 8 are arranged outside the main pipe body. The water tank 9 is communicated with a water spray pipe 20 through the connecting pipe 7 and the water pump 8. The water spray pipe 20 is arranged inside the main pipe body. A number of nozzles facing the coarse filter screen 21 are arranged on the water spray pipe 20. A filler layer for increasing the combination rate of the underground air and the water mist is arranged on the inner side surface of the coarse filter screen 21.

[0036] During operation, the water pump 8 pumps water out of the water tank 9. After passing through the connecting pipe 7 and the water spray pipe 20, the water is sprayed out from the nozzle to form fine water mist. A part of the water mist will fall on the packing layer, and the other part will disperse in the air. By combining in two ways, the water mist combines with the dust particles in the air and flows towards the dust collector 19 under the action of the air flow.

[0037] A liquid level sensor 12 for detecting the water level in the water tank 9 is provided on the water tank 9. When the water level in the water tank 9 is low, the liquid level sensor 12 will send a signal, and at this time, water can be added to the water tank 9 manually.

[0038] The dust collector 19 includes a connecting rod and a number of corrugated plates. The number of corrugated plates is fixedly installed inside the main pipe body through the connecting rod; the middle of the corrugated plate is bent, and a number of corrugated plates are arranged in sequence to form a tortuous air duct. When the gas containing dust and water mist flows through the dust collector 19 at a certain speed, the air is quickly and continuously changed in the direction of movement. Due to the action of centrifugal force and inertia, the combination of water mist and dust in the air hits the corrugated plate and is captured. When the air collides with the corrugated plate and the aggregated liquid droplets are large enough that the gravity generated by themselves exceeds the resultant force of the upward force of the gas and the surface tension of the liquid, the liquid droplets are separated from the surface of the corrugated plate. The multi-fold structure of the corrugated plate increases the chance of the water mist and dust being captured, thereby removing a large amount of dust.

[0039] A cleaning door is hinged to the main pipe body in a manner that can be opened by a fan. After the cleaning door is opened, the opening faces the side where the corrugated plate is open, and the corrugated plate can be cleaned by spraying water into the inside from the opening.

[0040] A door body for flushing the filter screen 18 is also provided at the filter screen 18.

[0041] The lower part of the main pipe body is connected to a Y-shaped pipe 22. The upper end of the Y-shaped pipe 22 is connected to the main pipe body, and this connection point is located below the dust collector 19. The lower end of the Y-shaped pipe 22 is connected to a waste liquid tank 4. One side of the waste liquid tank 4 is connected to a drain pipe 5, and a valve is provided on the drain pipe 5. After the collected dust and water droplets are collected, they flow into the waste liquid tank 4 through the Y-shaped pipe 22 for storage, and the valve can be opened to discharge after a certain amount.

[0042] A wind guiding plate 17 is provided at the connection between the air supply pipe 10 and the main pipe body. The wind guiding plate 17 is an arc-shaped plate, and its air supply angle faces the air outlet end 11. The air entering from the air supply pipe 10 will only flow towards the air outlet end 11 under the guidance of the wind guiding plate 17, and will not collide with the air flow entering from the air inlet end 6 to generate turbulence, ensuring the smoothness of the air flow.

[0043] It further includes a support mechanism, which includes a bottom plate 3. Two support pads 1 are arranged at the lower part of the bottom plate 3, and a support seat 2 is arranged at the upper part of the bottom plate 3. An arc-shaped support surface is arranged at the upper part of the support seat 2 and is connected to the main pipe body through the arc-shaped support surface. The device can be stably placed on the ground through the support mechanism.

[0044] It should be noted that the terms "first", "second" and "third" in the present utility model are only for descriptive purposes, do not represent any order, and cannot be understood as indicating or implying relative importance. These terms can be interpreted as names.

[0045] Those skilled in the art should understand that the embodiments of the present utility model described above and shown in the drawings are only examples and do not limit the present utility model. The advantages of the present utility model have been fully and effectively realized. The functions and structural principles of the present utility model have been shown and described in the embodiments. Without departing from the principle, any deformation or modification of the embodiments of the present utility model is possible.

Claims

1. A ventilation device for underground coal mines, characterized in that: It comprises a three-way pipe body, the three-way pipe body comprises a main pipe body and an air supply pipe, the air supply pipe is connected with the middle part of the main pipe body, and the front and rear ends of the main pipe body are respectively an air inlet end and an air outlet end; The air outlet end is provided with an air outlet device for driving the air flow from the air supply pipe and the air inlet end to the air outlet end; A filtering device for filtering underground air is arranged at the air inlet end.

2. The underground coal mine ventilation device according to claim 1, characterized in that: The air outlet device includes a bracket and an explosion-proof motor, the explosion-proof motor is installed on the inner side of the air outlet end through the bracket, the output shaft of the explosion-proof motor is connected to a fan blade, and the airflow direction of the fan blade is from the air supply pipe and the air inlet end to the air outlet end.

3. The underground ventilation device for coal mines according to claim 2, characterized in that: A protective screen is provided at the air outlet, and the screen is located at the outer side of the fan blades.

4. The underground coal mine ventilation device according to claim 1, characterized in that: The filtering device includes a coarse filter, a spray structure, a dust collector and a filter arranged in sequence from the outside to the inside. The underground air with dust and mist enters the air inlet end from the outside, passes through the coarse filter, the spray structure, the dust collector and the filter in sequence, and then merges with the clean air at the air supply pipe and is discharged from the air outlet end.

5. The underground coal mine ventilation device according to claim 4, characterized in that: The inner side of the coarse filter is provided with a filler layer for improving the combination rate of underground air and water mist.

6. The underground coal mine ventilation device according to claim 4, characterized in that: The spray structure comprises a water spray pipe arranged inside the main pipe body, and the water spray pipe is provided with a plurality of spray heads facing the coarse filter screen; A water tank, a connecting pipe and a water pump are arranged outside the main pipe body, and the water tank is connected with the water spray pipe through the connecting pipe and the water pump; The water tank is provided with a liquid level sensor for detecting the water level in the water tank.

7. The underground coal mine ventilation device according to claim 4, characterized in that: The dust collector comprises a connecting rod and a plurality of corrugated plates, wherein the plurality of corrugated plates are fixedly mounted inside the main pipe body through the connecting rod; A cleaning door is hingedly connected to the main pipe body in an openable manner.

8. The underground coal mine ventilation device according to claim 7, characterized in that: The lower part of the main pipe is connected with a Y-shaped pipe, the upper end of the Y-shaped pipe is connected with the main pipe, and the connection point is located below the dust collector; The lower end of the Y-shaped tube is connected to a waste liquid tank, one side of the waste liquid tank is connected to a drain pipe, and a valve is arranged on the drain pipe.

9. The underground coal mine ventilation device according to claim 1, characterized in that: An air guide plate is provided at the connection point between the air supply pipe and the main pipe body. The air guide plate is an arc-shaped plate, and its air supply angle is toward the air outlet end.

10. The underground coal mine ventilation device according to claim 1, characterized in that: It also includes a supporting mechanism, which includes a base plate, two supporting pads are arranged at the lower part of the base plate, a supporting seat is arranged at the upper part of the base plate, an arc-shaped supporting surface is arranged at the upper part of the supporting seat and is connected to the main pipe body through the arc-shaped supporting surface.

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