Noise reduction type ventilation device for mine

Abstract

The utility model relates to the technical field of mine ventilation, in particular to a noise reduction type ventilation device for mines, which comprises a base, a cylinder is mounted on the base, a buffer mechanism is arranged between the cylinder and the base, a blade component is arranged in the cylinder, two open ends of the cylinder are respectively provided with a group of dust screens, and the dust screens are arranged on the base. A detachable micropore noise reduction plate is arranged on the inward side of each dustproof net, the two micropore noise reduction plates are symmetrically arranged, and arc-shaped through holes allowing the micropore noise reduction plates to pass through are formed in the positions, at the micropore noise reduction plates, of the cylinder body. According to the device, sound waves can be absorbed and blocked through the vent holes in the micropore noise reduction plate, the micropore noise reduction plate is convenient to disassemble and assemble, the replacement convenience is greatly improved, and later cleaning and maintenance are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of mine ventilation, in particular to a noise-reducing ventilation device for mines. Background Art

[0002] Mine ventilation is an important link to maintain the safe production and working environment of the mine. During the underground mine exploitation process, the ventilation system is responsible for discharging harmful gases and dust in the mine, and at the same time transporting fresh air to ensure the breathing safety of miners and the comfort of the working environment. A reasonable ventilation design can effectively reduce the temperature and humidity in the mine and prevent the accumulation of gas and the occurrence of fire accidents, which is a key part of mine safety management. During the mine exploitation process, the ventilator is the key equipment to realize mine ventilation. During the operation of the existing mine ventilator, a great deal of noise will be generated, forming serious noise pollution. This kind of noise not only interferes with the normal work and rest of miners, but also may cause damage to the hearing health of miners. Therefore, at present, noise reduction is often carried out on the ventilator by wrapping sound-absorbing cotton and other methods, but this method has relatively limited measures for noise control and poor noise reduction effect.

[0003] The Chinese utility model patent with the authorization announcement number of CN215108988U discloses a noise-reducing ventilation device for mines, including a base, a cylinder, a motor and a fan blade fixed on the output shaft of the motor. The inner cavity wall of the cylinder is installed with a sound-absorbing cotton layer through bolts. Two groups of buffer mechanisms are symmetrically arranged at the top and bottom of the inner cavity of the cylinder. The motor is located between the two groups of buffer mechanisms and is fixedly connected thereto. Microporous noise reduction plate groups are symmetrically installed on the left and right sides of the two groups of buffer mechanisms. A vacuum cavity is arranged in the inner cavity of the cylinder. By using the buffer mechanism, the vibration generated during the operation of the motor can be buffered and damped, and the equipment can be prevented from generating greater noise due to vibration. The noise generated during the operation of the motor is reduced by the sound-absorbing cotton layer and the microporous noise reduction plate groups. However, due to more dust during the mine construction process, the ventilation holes of the microporous noise reduction plates are easy to be blocked after long-term work, affecting the noise reduction effect, and need to be cleaned regularly. However, the above scheme does not disclose a convenient maintenance and cleaning scheme for the microporous noise reduction plates. Utility Model Content

[0004] In order to overcome the deficiencies existing in the prior art, the utility model provides a noise-reducing ventilation device for mines.

[0005] To achieve the above object, a noise-reducing ventilation device for mines disclosed by the present utility model includes a base, a cylinder is installed on the base, a buffer mechanism is provided between the cylinder and the base, a blade assembly is provided inside the cylinder, a set of dust-proof nets are provided at each of the two open ends of the cylinder, a detachable microporous noise-reducing plate is provided on the inner side of each set of dust-proof nets, the two microporous noise-reducing plates are symmetrically arranged, an arc-shaped through hole for the microporous noise-reducing plate to pass through is provided on the cylinder body at the position of the microporous noise-reducing plate, and an arc-shaped plate that is clamped with the microporous noise-reducing plate and detachably connected to the cylinder is accommodated in the arc-shaped through hole.

[0006] Preferably, a guiding ring for clamping and limiting the microporous noise-reducing plate is provided on the inner wall of the cylinder, and a plurality of ventilation holes are penetrated and opened on the microporous noise-reducing plate.

[0007] Preferably, first fixing blocks are fixedly connected to both ends of the arc-shaped plate, insertion blocks are provided at the bottoms of the first fixing blocks, second fixing blocks are provided on the outer wall of the cylinder and are matched with the first fixing blocks, and slots for the insertion blocks to pass through are provided on the second fixing blocks.

[0008] Preferably, sliding grooves are opened on both sides of the insertion block, limiting blocks are slidably connected in the two sliding grooves, anti-disengagement limiting can be achieved after the insertion block passes through the slot, and a second spring is provided between the sliding groove and the limiting block, one end of the second spring is connected to the sliding groove, and the other end is connected to the limiting block.

[0009] Preferably, the number of the buffer mechanisms is two, which are symmetrically arranged at both ends of the cylinder, and each buffer mechanism includes a fixing plate connected to the outer wall of the cylinder, a connecting plate, a supporting plate connected to the base, and a spring assembly located between the connecting plate and the supporting plate, and the connecting plate is detachably connected to the fixing plate.

[0010] Preferably, the number of the spring assemblies is two, and each spring assembly includes a connecting shaft and a first spring sleeved on the connecting shaft. One end of the connecting shaft is fixedly connected to the connecting plate, the other end penetrates through the supporting plate and is slidably connected to the supporting plate, a fixing disk is provided on the circumferential direction of the connecting shaft, and both ends of the first spring are respectively connected to the fixing disk and the supporting plate.

[0011] Preferably, a collar adapted to the fixing disk is sleeved outside the spring assembly, and the spring assembly can move up and down inside the collar.

[0012] Preferably, the blade assembly includes a supporting block connected to the inner wall of the cylinder, a motor is provided on one side of the supporting block, a connecting rod is rotatably connected to the other side of the supporting block, the output end of the motor drives the connecting rod to rotate, and a plurality of fan blades are provided on the connecting rod.

[0013] Preferably, a buffer pad that fits the outer wall of the cylinder is provided between the base and the cylinder, and sound-absorbing cotton is covered on the inner wall of the cylinder.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. Through the ventilation holes on the microporous noise reduction plate, the device can absorb and block sound waves. When the microporous noise reduction plate is damaged or needs to be replaced and cleaned, the two limit blocks can be squeezed by both hands and pushed into the inside of the sliding groove, and the first fixing block is pulled to drive the arc plate out of the arc through hole. At this time, the microporous noise reduction plate can be pulled out from the inside of the cylinder, which is convenient for the staff to disassemble and assemble the microporous noise reduction plate, greatly improving the replacement convenience and facilitating later cleaning and maintenance.

[0016] 2. The sound-absorbing cotton in the cylinder can absorb sound waves for the second time, further reducing the transmission of noise, thereby achieving the noise reduction effect. In addition, through the effective buffering of the first spring, the vibration of the device can be reduced, thus reducing the noise generated by the vibration of the device driven by the operation of the motor, greatly reducing the output of noise pollution, and also extending the service life of the device. Description of the Drawings

[0017] Figure 1 is a three-dimensional view of the overall structure of the present utility model;

[0018] Figure 2 is an exploded view of the overall structure of the present utility model Figure 1 ;

[0019] Figure 3 is an exploded view of the overall structure of the present utility model Figure 2 ;

[0020] Figure 4 is Figure 3 an enlarged view of area A in

[0021] Figure 5 is Figure 2 an enlarged view of area B in

[0022] In the figure, 1. Base; 2. Support base; 3. Cylinder; 4. Buffer pad; 5. Dust-proof net; 6. Support block; 7. Motor; 8. Connecting rod; 9. Fan blade; 10. Guide ring; 11. Microporous noise reduction plate; 12. Ventilation hole; 13. Sound-absorbing cotton; 14. Fixed plate; 15. Connecting plate; 16. Connecting shaft; 17. Support plate; 18. Collar; 19. Fixed disk; 20. First spring; 21. Arc through hole; 22. Arc plate; 23. First fixing block; 24. Second fixing block; 25. Insert block; 26. Insert slot; 27. Sliding groove; 28. Limit block; 29. Second spring; 30. Buffer mechanism; 31. Blade assembly; 32. Spring assembly. Detailed Embodiments

[0023] The following combines the appended Figure 1 to the appended Figure 5 to describe the principles and features of the present utility model. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0024] A noise-reducing ventilation device for mines, such as Figures 1 to 3 shown, includes a base 1. A cylinder 3 is installed on the base 1. A buffer pad 4 that fits the outer wall of the cylinder 3 is provided between the base 1 and the cylinder 3. In this embodiment, two support seats 2 are fixedly connected to the top of the base 1. The support seats 2 are provided with arc surfaces adapted to the cylinder 3 for installing the cylinder 3. A buffer pad 4 is provided at the contact between the support seats 2 and the cylinder 3.

[0025] A blade assembly 31 is provided inside the cylinder 3. Further, the blade assembly 31 includes a support block 6 connected to the inner wall of the cylinder 3. A motor 7 is provided on one side of the support block 6. A connecting rod 8 is rotatably connected to the other side of the support block 6. The output end of the motor 7 drives the connecting rod 8 to rotate. A plurality of fan blades 9 are provided on the connecting rod 8.

[0026] A set of dust-proof nets 5 is provided at each of the two open ends of the cylinder 3, which can prevent foreign objects from entering the inside of the cylinder 3 when the blade assembly 31 is working. In order to reduce the noise transmitted to the outside when the blade assembly 31 is working, a detachable microporous noise reduction plate 11 is provided on the inner side of each group of dust-proof nets 5. The two groups of microporous noise reduction plates 11 are symmetrically arranged. A plurality of ventilation holes 12 are penetrated through each group of microporous noise reduction plates 11. At the same time, the inner wall of the cylinder 3 is covered with sound-absorbing cotton 13. During the working process of the blade assembly 31, the air inside the cylinder 3 flows, and sound waves will act on the microporous noise reduction plates 11. At this time, the ventilation holes 12 on the microporous noise reduction plates 11 can absorb and block the sound waves. At the same time, the sound-absorbing cotton 13 has high sound-absorbing performance and can absorb the sound waves twice, further reducing the transmission of noise, thereby achieving the noise reduction effect, effectively avoiding the occurrence of miners' hearing damage, solving the problem of high noise of traditional ventilation devices, significantly reducing the noise at the working face, and improving the working environment of miners.

[0027] Due to the relatively harsh mine environment, to ensure the noise reduction effect, the microporous noise reduction plate 11 needs to be regularly cleaned or replaced. To facilitate the disassembly and assembly of the microporous noise reduction plate 11, the cylindrical body 3 is provided with an arc-shaped through hole 21 for the microporous noise reduction plate 11 to pass through at the position of the microporous noise reduction plate 11. In this embodiment, the width of the arc-shaped through hole 21 is the same as the width of the microporous noise reduction plate 11. A guiding ring 10 for clamping and limiting the microporous noise reduction plate 11 is provided on the inner wall of the cylinder 3. The microporous noise reduction plate 11 enters the cylinder 3 through the arc-shaped through hole 21 and just falls into the slot of the guiding ring 10 to limit the microporous noise reduction plate 11. At the same time, in order to further limit the position of the microporous noise reduction plate 11, an arc-shaped plate 22 that is clamped with the microporous noise reduction plate 11 and detachably connected to the cylinder 3 is accommodated in the arc-shaped through hole 21. Both ends of the arc-shaped plate 22 are fixedly connected with a first fixing block 23. An insertion block 25 is provided at the bottom of the first fixing block 23. A second fixing block 24 that cooperates with the first fixing block 23 is provided on the outer wall of the cylinder 3. The second fixing block 24 is provided with a slot 26 for the insertion block 25 to pass through. The shape and size of the insertion block 25 are adapted to the slot 26.

[0028] Further, as Figure 5 shown, sliding grooves 27 are formed on both sides of the insertion block 25. A limiting block 28 is slidably connected in the two sliding grooves 27, which can realize anti-disengagement and limiting after the insertion block 25 passes through the slot 26. A second spring 29 is provided between the sliding groove 27 and the limiting block 28. One end of the second spring 29 is connected to the sliding groove 27, and the other end is connected to the limiting block 28. During use, both hands can be used to squeeze the two limiting blocks 28 to push them into the interior of the sliding groove 27 and squeeze the second spring 29 to contract. At this time, without the limiting interception of the limiting block 28, the first fixing block 23 is pulled to drive the arc-shaped plate 22 to move out of the interior of the arc-shaped through hole 21. At this time, the microporous noise reduction plate 11 in the microporous noise reduction assembly can be pulled out from the interior of the cylinder 3, which is convenient for the staff to replace or repair the microporous noise reduction plate 11, greatly improving the replacement convenience and facilitating later cleaning and maintenance. After the replacement or repair is completed, the microporous noise reduction plate 11 is reinserted into the interior of the cylinder 3. At this time, the insertion block 25 is aligned with the slot 26 and inserted, and then the limiting block 28 is released. Because the second spring 29 has a resilient property, it will drive the limiting block 28 to move out of the interior of the sliding groove 27, so as to realize the limiting and clamping of the microporous noise reduction plate 11 in the cylinder 3 and ensure the stability of the arc-shaped plate 22 during operation, making the replacement and repair operations simple and fast, and further improving the replacement convenience.

[0029] Further, as Figure 4As shown in the figure, in order to reduce the vibration noise during operation, a buffer mechanism 30 is provided between the cylinder 3 and the base 1. The number of buffer mechanisms 30 is two groups, which are symmetrically arranged at both ends of the cylinder 3. The buffer mechanism 30 includes a fixing plate 14 connected to the outer wall of the cylinder 3, a connecting plate 15, a support plate 17 connected to the base 1, and a spring assembly 32 located between the connecting plate 15 and the support plate 17. The connecting plate 15 and the fixing plate 14 are detachably connected by bolts. The number of spring assemblies 32 is two groups. The spring assembly 32 includes a connecting shaft 16 and a first spring 20 sleeved on the connecting shaft 16. One end of the connecting shaft 16 is fixedly connected to the connecting plate 15, and the other end thereof passes through the support plate 17 and is slidably connected to the support plate 17. A fixing disk 19 is provided in the circumferential direction of the connecting shaft 16. Both ends of the first spring 20 are connected to the fixing disk 19 and the support plate 17 respectively.

[0030] A collar 18 adapted to the fixing disk 19 is sleeved outside the spring assembly 32. The spring assembly 32 can be displaced up and down inside the collar 18, which can prevent foreign objects from entering the gap of the first spring 20 and causing the buffer shock absorption to fail. During use, as the motor 7 and the fan blade 9 continuously rotate, the whole device will be driven to vibrate, thereby generating mechanical noise. At this time, after the cylinder 3 is vibrated, because the buffer pad 4 has a certain elasticity, the two ends of the cylinder 3 will gently drive the fixing plate 14 and the connecting plate 15 to displace. The connecting plate 15 drives the connecting shaft 16 and the fixing disk 19 to slide along the inner wall of the collar 18, so that the first spring 20 is stretched and contracted correspondingly, and the pulling force generated by the springback reset of the first spring 20 drives the fixing disk 19 and the connecting shaft 16 to rebound together, realizing vibration buffering, thereby reducing the vibration noise generated during the operation of the blade assembly 31, greatly reducing the output of noise pollution, and also extending the service life of the device.

[0031] The working principle of this device: The motor 7 drives the connecting rod 8 and the fan blade 9 to rotate continuously, thereby generating a strong wind inside the cylinder 3, introducing fresh air into the mine, and at the same time discharging the dirty air under the mine. As the motor 7 and the fan blade 9 continuously rotate, it will generate relatively large noise and vibration. At this time, when the air flows inside the device, the sound wave will act on the microporous noise reduction plate 11. At this time, the ventilation holes 12 on the microporous noise reduction plate 11 can absorb and block the sound wave. At the same time, the sound-absorbing cotton 13 has high sound-absorbing performance and can absorb the sound wave twice, further reducing the transmission of noise, thereby realizing the noise reduction effect, effectively avoiding the occurrence of miners' hearing damage, solving the problem of large noise of traditional ventilation devices, significantly reducing the noise of the working face, and improving the working environment of miners;

[0032] As the motor 7 and the fan blades 9 continue to operate, the entire device will vibrate, thereby generating mechanical noise. At this time, after the cylinder 3 is vibrated, the buffer pad 4 has a certain elasticity, so that the two ends of the cylinder 3 will gently drive the fixing plate 14 and the connecting plate 15 to move, thereby driving the connecting shaft 16 and the fixing plate 19 to slide along the inner wall of the collar 18 through the connecting plate 15, so that the first spring 20 is stretched and contracted accordingly, and the tension generated by the rebound reset of the first spring 20 drives the fixing plate 19 and the connecting shaft 16 to rebound together, thereby achieving effective buffering, thereby reducing the noise generated by the vibration of the device driven by the operation of the motor 7, greatly reducing the output of noise pollution, and extending the service life of the device. Secondly, when the internal microporous noise reduction component is damaged or needs to be replaced, the two limit blocks 28 can be squeezed with both hands to push it to the inside of the slide groove 27 The second spring 29 is then released to move the limit block 28 out of the slide groove 27, thereby fixing the microporous noise reduction plate 11 in the cylinder 3 and ensuring the stability of the arc plate 22 during operation, making the replacement and maintenance operations simple and quick, and further improving the convenience of replacement.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A noise-reducing ventilation device for mines, comprising a base (1), characterized in that: A cylinder (3) is mounted on the base (1), a buffer mechanism (30) is provided between the cylinder (3) and the base (1), a blade assembly (31) is provided inside the cylinder (3), a group of dust screens (5) are provided at each open end of the cylinder (3), a detachable microporous noise reduction plate (11) is provided on the inner side of each group of dust screens (5), the two groups of microporous noise reduction plates (11) are symmetrically arranged, an arc-shaped through hole (21) is provided on the microporous noise reduction plate (11) of the cylinder (3) body for the microporous noise reduction plate (11) to pass through, and an arc-shaped plate (22) which is clamped with the microporous noise reduction plate (11) and detachably connected to the cylinder (3) is accommodated in the arc-shaped through hole (21).

2. The noise-reducing ventilation device for mines according to claim 1, characterized in that: The inner wall of the cylinder (3) is provided with a guide ring (10) for clamping and limiting the microporous noise reduction plate (11), and the microporous noise reduction plate (11) is penetrated by a plurality of ventilation holes (12).

3. The noise-reducing ventilation device for mines according to claim 1, characterized in that: Both ends of the arc-shaped plate (22) are fixedly connected to a first fixing block (23), a plug block (25) is provided at the bottom of the first fixing block (23), and the outer wall of the cylinder (3) is provided with a second fixing block (24) that cooperates with the first fixing block (23), and the second fixing block (24) is provided with a slot (26) for the plug block (25) to pass through.

4. The noise-reducing ventilation device for mines according to claim 3, wherein: Slide grooves (27) are provided on both sides of the insert block (25), and limit blocks (28) are slidably connected in the two slide grooves (27) to achieve anti-drop limit after the insert block (25) passes through the slot (26). A second spring (29) is provided between the slide groove (27) and the limit block (28), and one end of the second spring (29) is connected to the slide groove (27), and the other end thereof is connected to the limit block (28).

5. The noise-reducing ventilation device for mines according to claim 1, characterized in that: The buffer mechanism (30) is provided in two groups and is symmetrically arranged at both ends of the cylinder (3). The buffer mechanism (30) comprises a fixing plate (14) connected to the outer wall of the cylinder (3), a connecting plate (15), a supporting plate (17) connected to the base (1), and a spring assembly (32) located between the connecting plate (15) and the supporting plate (17). The connecting plate (15) is detachably connected to the fixing plate (14).

6. The noise-reducing ventilation device for mines according to claim 5, wherein: The spring assemblies (32) are provided in two groups. The spring assemblies (32) include a connecting shaft (16) and a first spring (20) sleeved on the connecting shaft (16). One end of the connecting shaft (16) is fixedly connected to the connecting plate (15), and the other end thereof passes through the supporting plate (17) and is slidably connected to the supporting plate (17). A fixed disk (19) is provided circumferentially on the connecting shaft (16), and two ends of the first spring (20) are respectively connected to the fixed disk (19) and the supporting plate (17).

7. The noise-reducing ventilation device for mines according to claim 6, wherein: The spring assembly (32) is sleeved with a sleeve ring (18) that matches the fixed disk (19) on the outside, and the spring assembly (32) can move up and down inside the sleeve ring (18).

8. The noise reduction type ventilation device for mines according to claim 1, wherein: The blade assembly (31) includes a support block (6) connected to the inner wall of the cylinder (3). A motor (7) is provided on one side of the support block (6). A connecting rod (8) is rotatably connected to the other side of the support block (6). The output end of the motor (7) drives the connecting rod (8) to rotate. A plurality of fan blades (9) are provided on the connecting rod (8).

9. The noise reduction type ventilation device for mines according to claim 1, characterized in that: A buffer pad (4) that fits against the outer wall of the cylinder (3) is provided between the base (1) and the cylinder (3). The inner wall of the cylinder (3) is covered with sound-absorbing cotton (13).

Images