Mining flame-proof press-in type axial flow local fan

Abstract

The utility model discloses a mining flame-proof press-in type axial flow local fan, which is characterized in that a side fixing plate is fixed on one side, close to a foot plate, of a fixing support foot, the bottom of the side fixing plate is bent towards one side to form a bent part attached to the outer wall surface of the foot plate, and a clamping cavity capable of clamping the foot plate is formed by the bent part and the fixing support foot; and the pressure plate and the inner silencing pad are pressed on the pressure net. The utility model relates to the technical field of mining equipment, which is characterized in that a side fixing plate is matched with a fixing bracket to form a structure that a clamping cavity clamps a foot plate, so as to form double-point fixation of a fixing support leg, and the fixing support leg, the foot plate and the bending part of the side fixing plate are fixed into a whole; and the problem that the working device directly falls off when the bolt is broken or falls off is effectively solved. And the pressure plate and the inner silencing pad are pressed at the part, penetrated by the foot plate, of the silencing pad and the pressure net, so that excessive sound transmission caused by a gap at the part is effectively prevented, and the silencing effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of mining equipment technology, specifically to a mine explosion-proof forced-in axial flow local ventilation fan. Background Technology

[0002] As a crucial component of mine ventilation systems, explosion-proof forced-flow axial-flow local ventilators directly impact mine safety and miners' health. Existing explosion-proof forced-flow axial-flow local ventilators are primarily tubular structures assembled from multiple ventilation ducts, internally housing blades, motors, and bearing housings. These components are circumferentially fixed to foot plates within the ventilation ducts via multiple fixed supports using bolts. However, this structure presents certain safety hazards and operational defects.

[0003] During use, the nuts on the bolts may come loose or break due to vibration, corrosion, or other reasons. If this happens, the working device will lose its support and fall, damaging the ventilator and potentially causing a safety accident. Furthermore, existing ventilators have sound-absorbing pads and pressure-fitted sound-absorbing pads inside each ventilation duct to reduce noise. However, the footplate penetrates these pads, allowing internal noise to escape through these gaps, reducing the sound absorption effect and increasing noise pollution in the mine. Therefore, improving the safety performance of explosion-proof forced-flow axial flow local ventilators in mines, reducing noise transmission, and improving maintenance efficiency are urgent problems to be solved. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a mine explosion-proof forced-in axial flow local ventilation fan, which solves the problems of the single fixing effect of the inner foot plate of the existing ventilation fan and the transmission of noise outward through the gaps penetrated by the foot plate.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a mine explosion-proof forced-in axial flow local ventilation fan, comprising a first ventilation pipe and a second ventilation pipe assembled together along the axial direction, and a working device disposed within the first and second ventilation pipes, wherein the working device is provided with a plurality of fixed legs in the circumferential direction; a sound-absorbing pad is fitted to the inner wall of the first and second ventilation pipes, the sound-absorbing pad is pressed and fixed within the first and second ventilation pipes by a pressure mesh, and a foot plate is welded to the inner wall of both the first and second ventilation pipes in the circumferential direction, wherein the fixed legs are fixedly assembled to the foot plate by bolts, and a nut is screwed onto the bolt and abuts against the foot plate;

[0006] A side fixing plate is fixed to the side of the fixed leg that is close to the foot plate. The bottom of the side fixing plate is bent to one side to form a bent part that fits against the outer wall of the foot plate. The bent part and the fixed leg form a clamping cavity that can clamp the foot plate.

[0007] The bottom of the bending section is connected to a pressure plate via a connecting plate. The pressure plate is penetrated by a foot plate. An inner sound-absorbing pad is provided on the inner side of the bottom of the pressure plate. The pressure plate and the inner sound-absorbing pad are pressed together on the pressure mesh.

[0008] Preferably, the bent portion has a through hole through which a bolt can pass, and a nut cap is provided in the through hole, with the nut located inside the nut cap.

[0009] Preferably, the nut cap is detachably connected to the through hole, and the inner cavity of the nut cap is polygonal to fit the nut.

[0010] Preferably, the bend between the side fixing plate and the bending portion forms a bottom contact surface, which is located above the foot plate.

[0011] Preferably, the pressure mesh is fixed with a side pressure ring near the flange of the first or second ventilation pipe, and the side pressure ring is pressed against the edge of the sound-absorbing pad.

[0012] Preferably, the inner side of the pressure mesh is press-fitted with a plurality of inner pressure rings, which are fixed to the first ventilation pipe or the second ventilation pipe by screws.

[0013] Preferably, an annular sound-absorbing pad is provided at the flange where the first ventilation pipe and the second ventilation pipe are assembled and connected. The annular sound-absorbing pad includes a transversely extended portion and a lower extended portion that is vertically located outside the transverse extended portion. The two ends of the transverse extended portion overlap the inner wall surface of the flange of the first ventilation pipe and the second ventilation pipe and are pressed together by a side pressure ring. The lower extended portion is located at the mating surface of the flange of the first ventilation pipe and the second ventilation pipe.

[0014] Preferably, the cross-section of the annular sound-absorbing pad is "T" shaped.

[0015] The beneficial effects of this utility model are as follows: By using the explosion-proof, forced-flow axial local ventilation fan for mines provided by this utility model, compared with the prior art, a structure is formed by setting a side fixing plate and a fixed bracket to cooperate and form a clamping cavity for the foot plate. When a bolt penetrates, the fixed foot, foot plate, and the bent part of the side fixing plate are fixed as one unit, forming a double-point fixation for the fixed foot, effectively solving the problem of the working device falling directly when the bolt breaks or falls off. Even if the bolt breaks or falls off, the fixed foot and the side fixing plate are still fixed together. At this time, the fixed foot and the side fixing plate sit on the foot plate, and the bottom contact surface contacts the top of the foot plate, thereby preventing the working device from falling directly when the fixed foot detaches from the foot plate, greatly improving the safety performance of the ventilation fan.

[0016] At the same time, the pressure plate and the inner sound-absorbing pad are pressed together at the part where the sound-absorbing pad and the pressure mesh are penetrated by the foot plate, which effectively prevents excessive sound transmission due to gaps in this area, improves the sound absorption effect, and reduces noise pollution in the mine.

[0017] In addition, the nut cap on the bent part secures the nut and prevents it from rotating. This ensures that the nut is restrained by the nut cap during the use of the ventilator, preventing it from rotating and coming off the bolt, thus further enhancing the reliability of the fixing structure. Attached Figure Description

[0018] Figure 1 This is a three-dimensional assembly diagram of the first and second ventilation pipes of this utility model;

[0019] Figure 2 This is a front view of the first and second ventilation pipes of this utility model after assembly.

[0020] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0021] Figure 4 This is a schematic diagram of the connection structure between the fixed support leg and the side fixing plate and the foot plate of this utility model;

[0022] Figure 5 This is a schematic diagram of the annular sound-absorbing pad of this utility model assembled on the first ventilation pipe and the second ventilation pipe.

[0023] Explanation of reference numerals in the figure

[0024] 1. First ventilation duct, 2. Second ventilation duct, 3. Foot plate, 4. Inner pressure ring, 5. Side pressure ring, 6. Pressure mesh, 7. Sound-absorbing pad, 8. Fixed support foot, 9. Bolt, 10. Pressure plate, 11. Inner sound-absorbing pad, 12. Side fixing plate, 121. Bending part, 13. Bottom contact surface, 14. Nut, 15. Nut cap, 16. Connecting plate, 17. Annular sound-absorbing pad, 171. Lateral extension, 172. Lower extension. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Various changes can be made to the implementation scheme as long as the effects of the present invention can be achieved.

[0026] Those skilled in the art can connect the components in this case sequentially. The specific connection and operation sequence should refer to the working principle described below. The detailed connection methods are well-known technologies in the field. The working principle and process are mainly described below.

[0027] Reference Figure 1-5 This embodiment describes a mine explosion-proof forced-flow axial flow local ventilation fan.

[0028] like Figure 1 and Figure 2 As shown, the ventilator includes a first ventilation pipe 1 and a second ventilation pipe 2 assembled together along their axial direction. In one embodiment, it may also include a third ventilation pipe and a fourth ventilation pipe. A working device is disposed within the first ventilation pipe 1 and the second ventilation pipe 2, the working device including components such as a motor and a bearing housing disposed inside the ventilator. Several fixed supports 8 are circumferentially arranged on the working device, and each working device has multiple fixed supports 8 welded to its circumference for support and fixation. Sound-absorbing pads 7 are fitted against the inner walls of the first ventilation pipe 1 and the second ventilation pipe 2, and the sound-absorbing pads 7 are pressed and secured within the first ventilation pipe 1 and the second ventilation pipe 2 by a pressure mesh 6.

[0029] like Figure 3 As shown, the inner side of the pressure mesh 6 is press-fitted with multiple inner pressure rings 4, which are fixed to the first ventilation pipe 1 or the second ventilation pipe 2 by screws. In this embodiment, by pressing the inner pressure rings 4 onto the pressure mesh 6, multiple points of the pressure mesh 6 are pressed and fixed, preventing the vibration and high-pressure wind generated during the operation of the ventilator from reducing the pressing effect of the pressure mesh 6 on the sound-absorbing pad 7.

[0030] In a preferred embodiment, such as Figure 2 and Figure 3 As shown, fixed feet 3 are welded to the inner walls of the first ventilation pipe 1 and the second ventilation pipe 2. Fixed feet 8 are fixedly assembled to the feet 3 by bolts 9, and nuts 14 are screwed onto the bolts 9 to abut against the feet 3. The fixed feet 8 of each working device are fixed to the feet 3 in the circumferential direction, so that each working device is fixed inside the first ventilation pipe 1 and the second ventilation pipe 2.

[0031] like Figure 4As shown, in this embodiment, a side fixing plate 12 is fixed to the side of the fixed leg 8 close to the foot plate 3. The bottom of the side fixing plate 12 is bent to one side to form a bent portion 121 that fits against the outer wall of the foot plate 3. The bent portion 121 and the fixed leg 8 form a clamping cavity for clamping the foot plate 3. By setting the side fixing plate 12 to cooperate with the fixed bracket 8, a clamping cavity is formed to clamp the foot plate 3. When the bolt 9 is passed through, the fixed leg 8, the foot plate 3 and the bent portion 121 of the side fixing plate 12 are fixed into one piece, forming a two-point fixation for the fixed leg 8.

[0032] Furthermore, a bottom contact surface 13 is formed at the bend between the side fixing plate 12 and the bending portion 121, and the bottom contact surface 13 is located above the foot plate 3. If the bolt 9 breaks and falls off, the fixed support leg 8 and the side fixing plate 12 remain fixed together. At this time, the fixed support leg 8 and the side fixing plate 12 sit on the foot plate 3, and the bottom contact surface 13 contacts the top of the foot plate 3, which can prevent the working device from falling directly when the fixed support leg 8 is separated from the foot plate 3.

[0033] In a preferred embodiment, a pressure plate 10 is connected to the bottom of the bent portion 121 via a connecting plate 16. The pressure plate 10 is penetrated by the foot plate 3, and an inner sound-absorbing pad 11 is provided on the inner side of the bottom of the pressure plate 10. The pressure plate 10 and the inner sound-absorbing pad 11 are pressed onto the pressure mesh 6. The pressure plate 10 is positioned circumferentially on the foot plate 3, pressing onto the part of the sound-absorbing pad 11 and the pressure mesh 6 that is penetrated by the foot plate 3, preventing excessive sound transmission due to gaps in this area.

[0034] like Figure 4 As shown, a through hole is provided on the bent portion 121 for the bolt 9 to pass through. A nut cap 15 is installed in the through hole, and the nut 14 is located inside the nut cap 15. The nut cap 15 secures the nut 14, preventing it from rotating. This ensures that the nut 14 is restrained by the nut cap 15 during the operation of the ventilator, preventing it from rotating and detaching from the bolt 9. In actual use, it should be noted that the side fixing plate 12 should be installed after the nut 14 has been rotated to a suitable angle on the bolt 9. When installing the side fixing plate 12, the nut cap 15 should be fitted onto the nut 14.

[0035] It should be noted that the nut cap 15 is detachably connected to the through hole. When using it, select the appropriate nut cap 15 according to the model of the nut 14. The inner cavity of the nut cap 15 is polygonal and is compatible with the nut 14.

[0036] In a preferred embodiment, such as Figure 2 and Figure 3As shown, a side pressure ring 5 is fixed to the flange of the first ventilation pipe 1 or the second ventilation pipe 2 near the pressure mesh 6. The side pressure ring 5 is pressed against the edge of the sound-absorbing pad 7. The side pressure ring 5 tidies and presses the flange of the first ventilation pipe 1 and the second ventilation pipe 2, making the flange neat, ensuring the normal connection of the first ventilation pipe 1 and the second ventilation pipe 2, and ensuring the fixing effect at the edge of the sound-absorbing pad 7.

[0037] Furthermore, such as Figure 5 As shown, an annular sound-absorbing pad 17 is provided at the flange where the first ventilation pipe 1 and the second ventilation pipe 2 are assembled and connected, which is used to reduce noise transmission at the flange connection point.

[0038] Specifically, the annular sound-absorbing pad 17 includes a transversely arranged lateral extension 171 and a lower extension 172 vertically arranged outside the lateral extension 171. The two ends of the lateral extension 171 overlap the inner wall surfaces of the flanges at the inlets of the first ventilation pipe 1 and the second ventilation pipe 2, and are pressed together by the edge pressure ring 5. The lower extension 172 is located at the mating surface of the flanges at the inlets of the first ventilation pipe 1 and the second ventilation pipe 2, sealing the assembly gap between the first ventilation pipe 1 and the second ventilation pipe 2. The cross-section of the annular sound-absorbing pad 17 is T-shaped.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mine explosion-proof forced-in axial flow local ventilation fan, comprising a first ventilation pipe (1) and a second ventilation pipe (2) assembled together along the axial direction, and a working device disposed within the first ventilation pipe (1) and the second ventilation pipe (2), wherein the working device is provided with a plurality of fixed supports (8) circumferentially; a sound-absorbing pad (7) is fitted to the inner wall of the first ventilation pipe (1) and the second ventilation pipe (2), and the sound-absorbing pad (7) is pressed and fixed within the first ventilation pipe (1) and the second ventilation pipe (2) by a pressure net (6), characterized in that: The inner walls of the first ventilation pipe (1) and the second ventilation pipe (2) are both welded with fixed foot plates (3). The fixed foot (8) is fixedly assembled on the foot plate (3) by bolts (9). The bolts (9) are screwed with nuts (14) that abut against the foot plate (3). The fixed support leg (8) has a side fixing plate (12) fixed on one side close to the foot plate (3). The bottom of the side fixing plate (12) is bent to one side to form a bent part (121) that fits against the outer wall of the foot plate (3). The bent part (121) and the support leg of the fixed support leg (8) form a clamping cavity that can clamp the foot plate (3). The bottom of the bent part (121) is connected to a pressure plate (10) via a connecting plate (16). The pressure plate (10) is penetrated by a foot plate (3). An inner sound-absorbing pad (11) is provided on the inner side of the bottom of the pressure plate (10). The pressure plate (10) and the inner sound-absorbing pad (11) are pressed together on the pressure mesh (6).

2. The mine explosion-proof forced-flow axial flow local ventilation fan according to claim 1, characterized in that: The bent portion (121) has a through hole through which a bolt (9) can pass. A nut cap (15) is provided in the through hole, and the nut (14) is located inside the nut cap (15).

3. A mine explosion-proof forced-flow axial flow local ventilation fan according to claim 2, characterized in that: The nut cap (15) is detachably connected to the through hole. The inner cavity of the nut cap (15) is polygonal and is adapted to the nut (14).

4. A mine explosion-proof forced-flow axial flow local ventilation fan according to claim 1, characterized in that: A bottom contact surface (13) is formed at the bend between the side fixing plate (12) and the bend (121), and the bottom contact surface (13) is located above the foot plate (3).

5. A mine explosion-proof forced-flow axial flow local ventilation fan according to claim 1, characterized in that: The pressure mesh (6) is fixed with a side pressure ring (5) near the flange of the first ventilation pipe (1) or the second ventilation pipe (2), and the side pressure ring (5) is pressed against the edge of the sound-absorbing pad (7).

6. A mine explosion-proof forced-flow axial flow local ventilation fan according to claim 1, characterized in that: The inner side of the pressure mesh (6) has multiple inner pressure rings (4), which are fixed to the first ventilation pipe (1) or the second ventilation pipe (2) by screws.

7. A mine explosion-proof forced-flow axial flow local ventilation fan according to claim 1, characterized in that: An annular sound-absorbing pad (17) is provided at the flange of the first ventilation pipe (1) and the second ventilation pipe (2) for assembly and docking. The annular sound-absorbing pad (17) includes a transverse extension (171) arranged laterally and a lower extension (172) arranged vertically outside the transverse extension (171). The two ends of the transverse extension (171) overlap the inner wall surface of the flange of the first ventilation pipe (1) and the second ventilation pipe (2) and are pressed by the edge pressure ring (5). The lower extension (172) is provided at the flange docking surface of the first ventilation pipe (1) and the second ventilation pipe (2).

8. A mine explosion-proof forced-flow axial flow local ventilation fan according to claim 7, characterized in that: The cross-section of the annular sound-absorbing pad (17) is "T" shaped.

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