Air supply device for coal mine underground tunneling

Abstract

The utility model relates to the technical field of mine ventilation, in particular to an air supply device for coal mine underground tunneling, which comprises a mounting pipe, a main shaft is arranged at the center inside the mounting pipe, and a plurality of blades are arranged on the outer surface of the main shaft. The positions, corresponding to the multiple blades, of the main shaft are provided with active avoiding assemblies used for enabling the blades to be automatically staggered when stones impact the blades, and the multiple blades are connected with the active avoiding assemblies in a matched mode through quick release assemblies. By arranging the active avoiding assembly and the quick release assembly, when stone in a mine hole collides with the blade, the blade can be twisted with the active avoiding assembly as the axis, rigid collision is converted into flexible buffering, and therefore most of collision energy can be discharged through an active force discharging mechanism, the blade is prevented from being cracked, deformed or fractured due to hard-to-hard collision, and the service life of the blade is prolonged. And meanwhile, due to the arrangement of the quick release assembly, the blade replacement work becomes convenient and fast, the structure is compact and reasonable, and the blade is easier to manufacture and assemble in the production process.

Description

Technical Field

[0001] This utility model relates to the field of mine ventilation technology, and in particular to a ventilation device for underground tunneling in coal mines. Background Technology

[0002] During underground tunneling in coal mines, ventilation devices are needed to ensure normal air circulation and meet the oxygen needs of workers. Therefore, ventilation devices for underground tunneling in coal mines are key equipment to ensure the safety and air circulation of underground operations.

[0003] A ventilation device for underground tunneling in coal mines, disclosed in Chinese Patent Publication No. CN222558581U, includes a ventilation duct. A motor is installed inside the ventilation duct, and the motor output is connected to a hub. Blades are evenly distributed on the outer side of the hub, with insertion rods connected to the sides of the blades closest to each other. Evenly spaced receiving grooves are formed inside the hub. Through the cooperation of the insertion rods and limiting blocks, as well as the cooperation of the connecting rings and locking rods, the device can both assemble and disassemble the blades and the hub, and also limit the rotation of the shaft to prevent displacement due to centrifugal force or impact from external objects. However... According to the air supply devices and existing technologies provided in the relevant fields, the blades of traditional devices are mostly fixed to the main shaft with bolts or fixed by plug-in limiting structures. Both of these methods are rigid installation structures. When stones in the mine hit the blades, the rigid connection will cause the impact force to act directly on the blade body and the connection part, which will make the blades prone to cracks, deformation or breakage. At the same time, when it is necessary to replace the blades, the bolt fixing method is more complicated to disassemble, while the plug-in limiting structure method has a complicated structural combination. The complex structure requires more raw materials, and the tolerance requirements between components are high, resulting in higher production costs. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a ventilation device for underground tunneling in coal mines.

[0005] The purpose of this utility model is achieved through the following technical solution: a ventilation device for underground tunneling in coal mines, including an installation pipe, a main shaft is provided at the center of the installation pipe, a plurality of blades are provided on the outer surface of the main shaft, and an active avoidance component is provided at the position of the main shaft corresponding to the position of the plurality of blades so that the blades can automatically be misaligned when stones hit the blades, the plurality of blades are connected to the active avoidance component through quick-release components, and a drive mechanism for controlling the rotation of the main shaft is provided inside the installation pipe.

[0006] Preferably, the active avoidance component includes a fixed housing fixedly mounted on the outer surface of the main shaft, a mounting shaft rotatably provided at the center of the fixed housing, two follower blocks symmetrically provided on the outer surface of the mounting shaft, two fixed blocks symmetrically fixed on the inner wall of the fixed housing, and the two follower blocks and the two fixed blocks are respectively connected by two elastic elements.

[0007] Preferably, the quick-release assembly includes a sleeve fixedly installed on the top of the mounting shaft. The core of the sleeve is hexagonal, and a connector is slidably provided inside the sleeve. A fixing seat is fixedly provided at one end of the connector away from the sleeve. The fixing seat is fixedly connected to the blade. The sleeve is provided with a locking assembly for locking the connector.

[0008] Preferably, the locking assembly includes a screw threaded onto the sleeve, a pull block fixedly provided at one end of the screw, a threaded hole provided at one end of the sleeve located on the screw, a receiving groove provided on the sleeve corresponding to the position of the pull block, and a plug hole provided on the connector adapted to the screw.

[0009] Preferably, a closing ring is fixedly installed at the opening of the fixed shell, and the outer surface of the sleeve is in contact with the inner wall of the closing ring.

[0010] Preferably, the drive mechanism includes a fixed frame that is fixedly installed on the inner wall of the mounting tube, a motor is mounted on the fixed frame, the motor is located at the center inside the mounting tube, and the output end of the motor is connected to the main shaft. Beneficial effects

[0011] This underground ventilation device for coal mine tunneling incorporates an active avoidance component and a quick-release component. When rocks in the mine collide with the blades, the blades can be twisted around the active avoidance component as the axis, transforming the rigid impact into a flexible buffer. This active force-dissipating mechanism can dissipate most of the impact energy, preventing the blades from cracking, deforming, or breaking due to hard impacts, thus extending the blades' service life. At the same time, the quick-release component makes blade replacement convenient. The compact and reasonable structure makes it easier to manufacture and assemble during production. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0014] Figure 2 This is a schematic diagram of the drive mechanism of this utility model;

[0015] Figure 3 This is a schematic diagram showing the normal operating state of the blade of this utility model;

[0016] Figure 4 This is a schematic diagram of the state of the blade of this utility model when it actively avoids obstacles;

[0017] Figure 5 This is a schematic diagram of the disassembled structure of the blade and sleeve of this utility model;

[0018] Figure 6 This utility model Figure 5 Enlarged structural diagram at point A;

[0019] Figure 7 This is a schematic diagram of the structure of the sleeve of this utility model;

[0020] Figure 8 This is a schematic diagram of the active obstacle avoidance component of this utility model.

[0021] In the diagram: 1. Mounting tube; 2. Main shaft; 3. Blade; 4. Active avoidance assembly; 401. Fixed housing; 4011. Closing ring; 402. Mounting shaft; 403. Follower block; 404. Fixed block; 405. Elastic element; 5. Quick release assembly; 501. Sleeve; 5011. Threaded hole; 5012. Receiving groove; 502. Connector; 5021. Insertion hole; 503. Fixed seat; 6. Drive mechanism; 601. Fixing bracket; 602. Motor; 7. Locking assembly; 701. Screw; 702. Pull block. Detailed Implementation

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.

[0024] like Figures 1 to 8As shown, a ventilation device for underground tunneling in a coal mine includes an installation pipe 1. A main shaft 2 is located at the center inside the installation pipe 1. Multiple blades 3 are provided on the outer surface of the main shaft 2. Active avoidance components 4 are provided at the positions of the main shaft 2 corresponding to the multiple blades 3, so that the blades 3 can automatically be misaligned when stones hit them. The multiple blades 3 are connected to the active avoidance components 4 through quick-release components 5. A drive mechanism 6 for controlling the rotation of the main shaft 2 is provided inside the installation pipe 1.

[0025] like Figure 3 , Figure 4 , Figure 6 and Figure 8 As shown, the active avoidance component 4 includes a fixed housing 401 fixedly installed on the outer surface of the main shaft 2. A mounting shaft 402 is rotatably provided at the center of the fixed housing 401. Two follower blocks 403 are symmetrically provided on the outer surface of the mounting shaft 402. Two fixed blocks 404 are symmetrically fixed on the inner wall of the fixed housing 401. The two follower blocks 403 and the two fixed blocks 404 are respectively connected by two elastic elements 405. When a mine stone hits the blade 3, the blade 3 can be twisted around the axis by the active avoidance component 4, so that the rigid impact is converted into a flexible buffer. In this way, most of the impact energy can be dissipated through the active force relief mechanism, so as to avoid the blade 3 from cracking, deforming or breaking due to hard impact, extend the service life of the blade 3, and reduce the frequency of downtime maintenance caused by blade 3 damage.

[0026] like Figures 4 to 7As shown, the quick-release assembly 5 includes a sleeve 501 fixedly mounted on the top of the mounting shaft 402. A closing ring 4011 is fixedly mounted at the opening of the fixing shell 401. The outer surface of the sleeve 501 is in contact with the inner wall of the closing ring 4011. The core of the sleeve 501 is hexagonal. A connector 502 is slidably provided inside the sleeve 501. A fixing seat 503 is fixedly provided at the end of the connector 502 away from the sleeve 501. The fixing seat 503 is fixedly connected to the blade 3. The sleeve 501 is provided with a locking assembly 7 for locking the connector 502. The locking assembly 7 includes a screw 701 threadedly connected to the sleeve 501. A pull block 702 is fixedly provided at one end of the screw 701. A threaded hole 5011 is opened at the end of the sleeve 501 located at the screw 701. A receiving groove 5012 is opened on the sleeve 501 corresponding to the position of the pull block 702. A groove is opened on the connector 502 that corresponds to the screw 701. The quick-release assembly 5 has a matching socket 5021. When the blade 3 needs to be replaced, the screw 701 is rotated by the pull block 702, causing the screw 701 to disengage from the threaded hole 5011. Then, the screw 701 can be pulled out of the socket 5021 by the pull block 702. After the screw 701 is pulled out, the blade 3 is pulled to separate the connector 502 from the sleeve 501. After the old blade 3 is removed, the connector 502 on the new blade 3 is inserted into the sleeve 501. Then, the screw 701 is passed through the socket 5021 and threaded into the threaded hole 5011 by the pull block 702, thus completing the replacement of the blade 3. In summary, the quick-release assembly 5 has a compact and reasonable structure, making it easier to manufacture and assemble during the production process. The reasonable structural design reduces material waste and process complexity during the production process, thereby reducing production costs and improving the product's competitiveness in the market.

[0027] like Figure 2 As shown, the drive mechanism 6 includes a fixed frame 601 fixedly installed on the inner wall of the mounting tube 1. A motor 602 is mounted on the fixed frame 601. The motor 602 is located at the center inside the mounting tube 1. The output end of the motor 602 is connected to the main shaft 2.

[0028] The work process is as follows:

[0029] S1: As Figure 3 , Figure 4 , Figure 6 and Figure 8As shown, when a mine stone impacts the blade 3, the blade 3 can be torn around the axis of the active avoidance component 4, turning the rigid impact into a flexible buffer. This active force-dissipating mechanism can dissipate most of the impact energy, preventing the blade 3 from cracking, deforming, or breaking due to hard impact, thus extending the service life of the blade 3 and reducing the frequency of downtime maintenance caused by blade 3 damage. (When a mine stone impacts the blade 3, the blade 3 will cause the mounting shaft 402 to rotate around the fixed shell 401 through the fixed seat 503, the plug-in component 502, and the sleeve 501. At this time, the two follower blocks 403 will cause the two elastic elements 405 to deform when they rotate with the mounting shaft 402.)

[0030] S2: As Figure 3 , Figure 4 , Figure 6 and Figure 8 As shown, blade 3 can automatically reset after being impacted, without affecting subsequent aerodynamic efficiency (when blade 3 is no longer under force, the elastic force of the two elastic elements 405 is restored, thereby causing the mounting shaft 402 to cause blade 3 to automatically reset through the fixed seat 503, the plug-in 502 and the sleeve 501).

[0031] S3: As Figures 3 to 8 As shown, when it is necessary to replace blade 3, screw 701 is rotated by pull block 702 to disengage screw 701 from threaded hole 5011, and then screw 701 can be pulled out from insertion hole 5021 by pull block 702.

[0032] S4: As Figures 3 to 8 As shown, when screw 701 is pulled out, the insert 502 is separated from sleeve 501 by pulling blade 3;

[0033] S5: As Figures 3 to 8 As shown, after the old blade 3 is removed, the connector 502 on the new blade 3 is inserted into the sleeve 501, and then the screw 701 is passed through the insertion hole 5021 and threaded into the threaded hole 5011 by the pull block 702, thereby completing the replacement of the blade 3.

[0034] The mounting tube 1, main shaft 2, blade 3 and motor 602 described in this application are all known technologies in this field, therefore their specific structures and working principles are not described in detail.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A ventilation device for underground tunneling in coal mines, characterized in that: The device includes a mounting tube (1), a main shaft (2) is provided at the center inside the mounting tube (1), and multiple blades (3) are provided on the outer surface of the main shaft (2). The main shaft (2) is provided with active avoidance components (4) at the positions corresponding to the multiple blades (3) so that the blades (3) can automatically be misaligned when a stone hits the blades (3). The multiple blades (3) are connected to the active avoidance components (4) through quick-release components (5). The inside of the mounting tube (1) is provided with a drive mechanism (6) for controlling the rotation of the main shaft (2). The active avoidance component (4) includes a fixed housing (401) fixedly installed on the outer surface of the main shaft (2). A mounting shaft (402) is rotatably provided at the center of the fixed housing (401). Two follower blocks (403) are symmetrically provided on the outer surface of the mounting shaft (402). Two fixed blocks (404) are symmetrically fixed on the inner wall of the fixed housing (401). The two follower blocks (403) and the two fixed blocks (404) are respectively connected by two elastic elements (405). The quick-release assembly (5) includes a sleeve (501) fixedly installed on the top of the mounting shaft (402). The core of the sleeve (501) is hexagonal. A connector (502) is slidably provided inside the sleeve (501). A fixing seat (503) is fixedly provided at one end of the connector (502) away from the sleeve (501). The fixing seat (503) is fixedly connected to the blade (3). A locking assembly (7) for locking the connector (502) is provided on the sleeve (501).

2. The ventilation device for underground tunneling in coal mines according to claim 1, characterized in that: The locking assembly (7) includes a screw (701) threaded onto the sleeve (501), a pull block (702) fixedly provided at one end of the screw (701), a threaded hole (5011) provided at one end of the sleeve (501) located on the screw (701), a receiving groove (5012) provided on the sleeve (501) corresponding to the position of the pull block (702), and a plug hole (5021) provided on the plug-in (502) that is adapted to the screw (701).

3. The ventilation device for underground tunneling in coal mines according to claim 1, characterized in that: A closing ring (4011) is fixedly installed at the opening of the fixed shell (401), and the outer surface of the sleeve (501) is in contact with the inner wall of the closing ring (4011).

4. The ventilation device for underground tunneling in coal mines according to claim 1, characterized in that: The drive mechanism (6) includes a fixed frame (601) fixedly installed on the inner wall of the mounting tube (1), a motor (602) is installed on the fixed frame (601), the motor (602) is located at the center inside the mounting tube (1), and the output end of the motor (602) is connected to the main shaft (2).

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