Coal mine underground ventilation equipment

Abstract

The utility model discloses underground coal mine ventilation equipment, and relates to the technical field of coal mine ventilation. Comprising a barrel, a diffusion barrel is arranged at one end of the barrel, and a rotatable impeller is arranged in the barrel; a transmission assembly is arranged in the barrel and comprises a sliding plate capable of sliding relative to the barrel, a cleaning mechanism is arranged at the position, close to the impeller, of the sliding plate and comprises a guide seat and a limiting spring, the guide seat is fixedly connected to the sliding plate, a sliding rod slidably penetrates through the side face of the guide seat, and an elastic block is arranged at the end, close to the impeller, of the sliding rod. The sliding rod is sleeved with the limiting spring, one end of the limiting spring is connected with the guide base, and the other end of the limiting spring is connected with the elastic block. In the initial state, the elastic blocks abut against the inclined blades on the impeller. The self-adaptive cleaning device can be used for cleaning the blades in a self-adaptive manner, and normal flowing of airflow is guaranteed; the problems that the ventilation effect is reduced and the energy consumption is greatly increased in the operation process of underground ventilation equipment are solved.

Description

Technical Field

[0001] This utility model relates to the field of coal mine ventilation technology, specifically to a coal mine underground ventilation device. Background Technology

[0002] In underground coal mine production operations, the ventilation system is a core infrastructure to ensure operational safety and personnel health. Its main function is to deliver fresh air underground and dilute and discharge harmful gases and pollutants such as methane and dust. Currently, counter-rotating axial flow fans have become one of the mainstream ventilation equipment in underground coal mines due to their advantages such as high air pressure, large flow rate, compact structure, and adaptability to narrow underground spaces. They are widely used in tunneling faces, mining areas, and main ventilation roadways.

[0003] Chinese Patent Application No. 202321634439.0 discloses a ventilation device for underground coal mines. This device includes a first pipe with an induced draft fan fixedly connected to its inner wall. One end of the first pipe is connected to a second pipe. The second pipe contains a filter and a cleaning component. The filter includes a frame, a filter screen, and an activated carbon plate, both fixedly connected inside the frame. The cleaning component includes a support frame and a scraper, with the scraper fixedly connected to the outside of the support frame. However, due to the extremely high dust concentration in underground air, some dust enters the fan during operation and gradually adheres to and accumulates on the impeller surface, especially the pressure and suction surfaces of the blades. This significantly increases the flow resistance within the impeller, requiring the fan to consume more energy to maintain the original ventilation pressure and volume, directly increasing energy consumption and reducing the fan's aerodynamic efficiency. This prevents the sufficient dilution of harmful gases underground, posing a potential threat to operational safety.

[0004] To reduce the direct entry of dust into the fan, existing counter-rotating axial flow fans typically have filter components at the air inlet to intercept large dust particles, fibers, coal fragments, and other floating debris in the air. However, in the high-dust, high-suspended-matter environment underground, a large amount of dust and floating debris can easily and quickly adhere to the outside of the filter components, forming a blockage layer. This causes a sharp increase in air intake resistance, making it impossible to meet the fresh air supply needs of the underground working face. Furthermore, it leads to a significant increase in motor power consumption and further increases energy consumption, which does not meet the current energy conservation and environmental protection development requirements of the coal mining industry. Utility Model Content

[0005] This invention overcomes the shortcomings of existing technologies and proposes a ventilation device for underground coal mines. It can adaptively clean the blades inside the ventilation device to ensure normal airflow, and adaptively clean the air intake filter components to ensure effective air intake. This solves the problems of decreased ventilation effect and significantly increased energy consumption during the operation of underground ventilation equipment.

[0006] In order to achieve the above object, the utility model is through the following technical scheme realizes:

[0007] A coal mine underground ventilation equipment, including cylinder, one end of cylinder is equipped with diffusion cylinder, rotatable impeller is set up in cylinder, the inside of cylinder is equipped with transmission assembly, transmission assembly includes the sliding plate that can slide relative to cylinder, the position of sliding plate is equipped with cleaning mechanism near impeller, and cleaning mechanism is located on the side of impeller near diffusion cylinder, the cleaning mechanism includes guide seat and limit spring, guide seat is fixedly connected on sliding plate, the side surface of guide seat is slidably penetrated by slide rod, the end of slide rod near impeller is equipped with elastic block, limit spring is set on slide rod, one end of limit spring is connected with guide seat, the other end of limit spring is connected with elastic block, in initial state, elastic block and the inclined blade on impeller resist.

[0008] Further, the diffusion end of the diffusion cylinder movably has a grating plate, and the inner wall of the diffusion cylinder movably has a limiting rod, and the grating plate movably sleeves on the limiting rod.

[0009] Further, the transmission assembly further comprises a support arranged at both ends of the cylinder, the sliding plate slidably penetrates between the two supports, one end of the sliding plate near the grating plate is provided with a mounting seat, the side surface of the mounting seat is provided with a guide rod, and the end of the guide rod is fixedly connected with the side surface of the grating plate.

[0010] Further, the guide rod is sleeved with a reset spring, one end of the reset spring is connected with the mounting seat, and the other end of the reset spring is connected with the support.

[0011] Further, the inside of the cylinder is provided with a motor on both sides, and the opposite end of the motor on both sides is fixedly sleeved with an impeller.

[0012] Further, the other end of the cylinder is provided with an air inlet filter plate, and the cleaning mechanism is arranged on the sliding plate near the air inlet filter plate.

[0013] Further, the cleaning mechanism comprises a driving rod, the end of the driving rod is arranged on the sliding plate through a fixing seat, the driving rod slidably penetrates the support, the end of the driving rod is provided with a connecting rod, and the end of the connecting rod near the air inlet filter plate is provided with an elastic head.

[0014] Further, the air inlet filter plate is made of elastic material, and the elastic head is made of rubber material.

[0015] Further, the grating plate and the diffusion cylinder are provided with an elastic ring.

[0016] The utility model has the advantages that:

[0017] 1. When the ventilation equipment is in normal operation, the high-pressure airflow pushes the grid plate to move outward, compresses the reset spring, and makes the elastic block in the cleaning mechanism away from the impeller. When the airflow is reduced due to the blockage of the air inlet filter plate, the reset spring is stretched, the sliding plate is reset, and the elastic block is in contact with the impeller blade. When the impeller rotates, the inclined blade periodically pushes the elastic block, and the sliding rod reciprocates in the guide seat. The elastic block repeatedly hammers the surface of the blade, and the dust adhered is shaken off. The automatic maintenance of the impeller cleaning can be realized, the airflow resistance is reduced, and the stability of the fan aerodynamic efficiency is effectively ensured.

[0018] 2. When the air inlet filter plate is blocked due to dust accumulation, the air pressure in the cylinder is reduced, the reset spring pushes the sliding plate to reset, the elastic head in the cleaning mechanism is in contact with the air inlet filter plate, and the reciprocating movement of the elastic block transmits vibration through the sliding plate to drive the elastic head to vibrate the air inlet filter plate at a high frequency. The dust and floating objects blocked in the filter hole are sucked into the cylinder by the airflow, and are discharged through the grid plate, so that the air inlet is automatically restored, and the increase of energy consumption and the decrease of ventilation effect caused by blockage are avoided.

[0019] 3. The utility model can continuously maintain the cleaning state of the impeller and the air inlet filter plate during operation, reduces the additional power consumption of the fan due to dust accumulation, reduces the power consumption, prolongs the service life, ensures the continuous and efficient operation of the ventilation system, meets the development requirements of energy saving and environmental protection in the coal mine industry, automatically optimizes the performance in the high-dust environment, reduces the maintenance requirement, and realizes long-term energy-saving operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an external structure schematic diagram of the utility model;

[0021] Figure 2 It is an internal structure schematic diagram of the utility model;

[0022] Figure 3 It is the utility model Figure 2 It is an enlarged structure schematic diagram of A in the utility model;

[0023] Figure 4 It is another angle structure schematic diagram of the utility model;

[0024] Figure 5 It is the utility model Figure 4 It is an enlarged structure schematic diagram of B in the utility model;

[0025] Figure 6 It is the utility model Figure 4 It is an enlarged structure schematic diagram of C in the utility model.

[0026] In the diagram: 1. Cylinder; 101. Diffuser; 102. Limiting rod; 103. Grating plate; 104. Elastic ring; 105. Inlet filter plate; 2. Motor; 3. Impeller; 4. Transmission assembly; 401. Support; 402. Sliding plate; 403. Mounting seat; 404. Guide rod; 405. Return spring; 406. Guide seat; 407. Slide rod; 408. Elastic block; 409. Limiting spring; 410. Fixed seat; 411. Drive rod; 412. Connecting rod; 413. Elastic head. Detailed Implementation

[0027] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it. The technical solution of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0028] like Figures 1 to 6 As shown in the figure, this embodiment discloses a ventilation device for underground coal mines, including a cylinder 1. Motors 2 are arranged facing each other on both sides of the interior of the cylinder 1, and impellers 3 are fixedly sleeved at opposite ends of the motors 2 on both sides. A diffuser 101 is provided at one end of the cylinder 1. The diffuser 101 has a conical structure, and a grid plate 103 is movably provided at the diffuser end of the diffuser 101. A limiting rod 102 is provided on the inner wall of the diffuser 101, and the grid plate 103 is movably sleeved on the limiting rod 102. An elastic ring 104 is provided between the grid plate 103 and the diffuser 101.

[0029] The motors 2 on both sides drive the impellers 3 on both sides respectively. The impellers 3 on both sides rotate in opposite directions and generate airflow in the same direction under the action of the blades on the impellers 3. The two airflows in the same direction generate high-pressure gas towards the grid plate 103.

[0030] The diffuser 101 is used to increase the coverage of the airflow. The high-pressure airflow generated inside the cylinder 1 towards the grid plate 103 will cause the grid plate 103 to slide outward along the limiting rod 102. The elastic ring 104 is used to ensure that the connection between the diffuser 101 and the cylinder 1 is always sealed when the grid plate 103 moves along the limiting rod 102.

[0031] An air inlet filter plate 105 is provided at the other end of the cylinder 1. The air inlet filter plate 105 is made of elastic material. The air inlet filter plate 105 is used to filter the incoming airflow and reduce the entry of external dust and impurities into the cylinder 1. By using an elastic material, the air inlet filter plate 105 has the ability to deform elastically.

[0032] The inside of the barrel 1 is provided with two groups of transmission assemblies 4, each group of transmission assemblies 4 includes a support 401 arranged at both ends of the barrel 1, a sliding plate 402 is slidably penetrated between the supports 401 at both ends, the sliding plate 402 is provided with a mounting seat 403 at one end close to the grid plate 103, the side surface of the mounting seat 403 is provided with a guide rod 404, the guide rod 404 is sleeved with a reset spring 405, one end of the reset spring 405 is connected with the mounting seat 403, and the other end of the reset spring 405 is connected with the support 401; the end of the guide rod 404 is fixedly connected with the side surface of the grid plate 103. The sliding plate 402 is provided with a cleaning mechanism at a position close to the impeller 3, and the sliding plate 402 is provided with a cleaning mechanism at a position close to the air inlet filter plate 105. When the grid plate 103 slides outward under the action of high-pressure airflow, the guide rod 404 and the sliding plate 402 are driven to slide outward, the reset spring 405 is compressed, and at the same time, the cleaning mechanism moves away from the impeller 3, and the cleaning mechanism moves away from the air inlet filter plate 105.

[0033] Specifically, the cleaning mechanism includes a guide seat 406 and a limiting spring 409, the guide seat 406 is fixedly connected to the sliding plate 402, a sliding rod 407 is slidably penetrated through the side surface of the guide seat 406, the sliding rod 407 is provided with an elastic block 408 at one end close to the impeller 3, the limiting spring 409 is sleeved on the sliding rod 407, one end of the limiting spring 409 is connected with the guide seat 406, and the other end of the limiting spring 409 is connected with the elastic block 408; the elastic block 408 is preferably made of rubber.

[0034] In the initial state, the elastic block 408 is in contact with the inclined blades on the impeller 3, and when the elastic block 408 is in contact with the inclined blades on the impeller 3, the annular array of blades on the impeller 3 continuously rotates, and under the action of the limiting spring 409, the elastic block 408 is driven to reciprocate linearly, the elastic block 408 repeatedly hammers the inclined blades on the impeller 3, so as to shake off the dust attached to the impeller 3 and discharge the dust through the airflow passing through the grid plate 103. When the grid plate 103 slides outward under the action of high-pressure airflow, the sliding plate 402 moves to one side of the grid plate 103, and the guide seat 406, the sliding rod 407 and the elastic block 408 are driven to move away from the impeller 3, and the cleaning mechanism no longer hammers the high-speed rotating impeller 3.

[0035] The cleaning mechanism includes a driving rod 411, the end of the driving rod 411 is arranged on the sliding plate 402 through a fixing seat 410, the driving rod 411 is slidably penetrated through the support 401, the end of the driving rod 411 is provided with a connecting rod 412, and the connecting rod 412 is provided with an elastic head 413 at one end close to the air inlet filter plate 105; the elastic head 413 is preferably made of rubber.

[0036] In the initial state, the elastic head 413 is in contact with the air inlet filter plate 105; when the air inlet filter plate 105 is blocked, the gas flow rate in the cylinder 1 decreases, the air pressure decreases, the compressed reset spring 405 is stretched and reset, and the grille plate 103 is reset, so that the elastic block 408 is in contact with the inclined blades on the impeller 3, and the elastic head 413 is in contact with the air inlet filter plate 105. When the elastic block 408 reciprocates linearly, it will drive the sliding plate 402 to vibrate, and the vibration of the sliding plate 402 will drive the elastic head 413 to vibrate through the driving rod 411 and the connecting rod 412. The vibration of the elastic head 413 makes the air inlet filter plate 105 of the elastic material vibrate, so that the dust and floating objects blocked in the filter holes of the air inlet filter plate 105 are loosened and sucked into the cylinder 1 under the action of the airflow, and finally discharged through the grille plate 103. When it returns to normal, the impeller 3 rotates at high speed to generate high-pressure airflow, at which time the sliding plate 402 moves to one side of the grille plate 103, and the connecting rod 412 and the elastic head 413 move away from the air inlet filter plate 105, stopping the knocking of the air inlet filter plate 105.

[0037] The working principle of the coal mine underground ventilation equipment proposed in this embodiment is:

[0038] In use, the two motors 2 drive the impellers 3 to rotate in opposite directions, and under the action of the blades of the impellers 3, high-pressure airflow in the same direction is generated, which flows from the air inlet end of the cylinder 1 to the diffusion cylinder 101. When the high-pressure airflow acts on the grille plate 103, it pushes the grille plate 103 to slide along the limiting rod 102 to the outside of the diffusion cylinder 101. When the grille plate 103 moves, the mounting seat 403 and the sliding plate 402 are driven to move in the same direction by the guide rod 404, and the reset spring 405 is compressed. At this time, the elastic block 408 in the cleaning mechanism and the elastic head 413 in the cleaning mechanism move away from the impeller 3 and the air inlet filter plate 105, and the equipment is in a normal ventilation state.

[0039] When the air inlet filter plate 105 is blocked due to dust accumulation, the airflow flow rate in the cylinder 1 decreases, the air pressure decreases, the reset spring 405 stretches under the action of elastic restoring force, and pushes the sliding plate 402 and the grille plate 103 to reset. During the reset process, the sliding plate 402 drives the cleaning mechanism and the cleaning mechanism to reset. When the airflow flow rate decreases to a preset threshold, the elastic block 408 will contact the inclined blades of the impeller 3, and the elastic head 413 will contact the air inlet filter plate 105.

[0040] When the impeller 3 continues to rotate, the inclined blades periodically push the elastic block 408, so that the sliding rod 407 reciprocates in the guide seat 406, and the limiting spring 409 is compressed or released. The reciprocating movement of the elastic block 408 repeatedly hammers the blade surface of the impeller 3, and shakes off the adhered dust. The dust is discharged outside the equipment along with the airflow through the grille plate 103.

[0041] Meanwhile, the reciprocating movement of the elastic block 408 causes the sliding plate 402 to vibrate, the vibration of the sliding plate 402 is transmitted to the elastic head 413 through the driving rod 411 and the connecting rod 412, the vibration of the elastic head 413 acts on the air inlet filter plate 105 made of elastic material, so that the dust and floating objects blocked in the filter holes are loosened, and are sucked into the inside of the cylinder 1 under the action of the air inlet airflow, and finally are discharged through the grid plate 103 along with the main airflow.

[0042] The above is a further detailed description of the utility model in combination with specific preferred embodiments, which cannot be deemed as limiting the specific embodiments of the utility model to the above, and for ordinary skilled persons in the technical field to which the utility model belongs, a number of simple deductions or substitutions can be made without departing from the utility model, which shall be deemed as belonging to the utility model and shall be determined by the submitted claims to determine the patent protection scope.

Claims

1. A coal mine underground ventilation device, comprising a cylinder (1), one end of the cylinder (1) is provided with a diffusion cylinder (101), and a rotatable impeller (3) is arranged in the cylinder (1); characterized in that, The inside of the barrel (1) is provided with a transmission assembly (4), the transmission assembly (4) includes a sliding plate (402) which can slide relative to the barrel (1), the sliding plate (402) is provided with a cleaning mechanism at a position close to the impeller (3), and the cleaning mechanism is located at a side of the impeller (3) close to the diffusion barrel (101); the cleaning mechanism includes a guide seat (406) and a limiting spring (409), the guide seat (406) is fixedly connected to the sliding plate (402), a slide rod (407) is slidably penetrated through a side surface of the guide seat (406), an elastic block (408) is arranged at one end of the slide rod (407) close to the impeller (3), the limiting spring (409) is sleeved on the slide rod (407), one end of the limiting spring (409) is connected to the guide seat (406), and the other end of the limiting spring (409) is connected to the elastic block (408); in the initial state, the elastic block (408) is in contact with inclined blades on the impeller (3).

2. A mine ventilation device according to claim 1, characterised in that, A grille plate (103) is movably arranged at the diffusion end of the diffusion barrel (101), and the inner wall of the diffusion barrel (101) is provided with a limiting rod (102), and the grille plate (103) is movably sleeved on the limiting rod (102).

3. A mine ventilation device according to claim 2, characterised in that, The transmission assembly (4) further includes a support (401) arranged at both ends of the barrel (1), and the sliding plate (402) is slidably penetrated between the supports (401) at both ends, one end of the sliding plate (402) close to the grille plate (103) is provided with a mounting seat (403), a guide rod (404) is arranged on a side surface of the mounting seat (403), and an end portion of the guide rod (404) is fixedly connected to a side surface of the grille plate (103).

4. A mine ventilation device according to claim 3, characterised in that, A reset spring (405) is sleeved on the guide rod (404), one end of the reset spring (405) is connected to the mounting seat (403), and the other end of the reset spring (405) is connected to the support (401).

5. The underground coal mine ventilation device of claim 1, wherein, Opposite sides of the inside of the barrel (1) are provided with motors (2), and opposite ends of the motors (2) on the two sides are both fixedly sleeved with impellers (3).

6. A coal mine underground ventilation apparatus as claimed in claim 5 wherein, The other end of the barrel (1) is provided with an air inlet filter plate (105), and the sliding plate (402) is provided with a cleaning mechanism at a position close to the air inlet filter plate (105).

7. A mine ventilation device according to claim 6, characterised in that, The cleaning mechanism includes a driving rod (411), an end portion of the driving rod (411) is arranged on the sliding plate (402) through a fixing seat (410), the driving rod (411) is slidably penetrated through the support (401), an end portion of the driving rod (411) is provided with a connecting rod (412), and one end of the connecting rod (412) close to the air inlet filter plate (105) is provided with an elastic head (413).

8. A mine ventilation device according to claim 7, characterised in that, The air inlet filter plate (105) is made of elastic material, and the elastic head (413) is made of rubber material.

9. A mine ventilation device according to claim 2, characterised in that, An elastic ring (104) is arranged between the grille plate (103) and the diffusion barrel (101).

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