Coal mine explosion-proof fan

Abstract

The utility model relates to coal mine fan technical field discloses a coal mine explosion -proof fan, include: axial flow fan, both ends of axial flow fan all are pasted with filter screen, the outer wall fixed limit block of filter screen, the end part of axial flow fan is equipped with limit groove, the inside of limit groove is clamped with limit block, the inside of the inside of limit groove is equipped with inner chamber, the inside of inner chamber is installed with the clamping plate, one end of clamping plate is clamped in the inside of the clamping groove, the clamping groove is equipped in one side of limit block, the other end of clamping plate is connected with the deepest place of inner chamber through spring, the outside of axial flow fan is equipped with through slot, this coal mine explosion -proof fan, the filter screen is conveniently and quickly disassembled from the axial flow fan and is cleaned, the filter screen is conveniently and quickly installed back to the end part of axial flow fan, the half section of filter screen is set up as sinusoidal structure, has increased filter screen filter area, has prolonged filter screen cleaning time, has reduced the labor intensity of manual work.

Description

Technical Field

[0001] This utility model relates to the field of coal mine ventilation technology, specifically to a coal mine explosion-proof ventilation fan. Background Technology

[0002] In underground coal mine operations, ventilation systems are crucial for safety. Traditional axial flow fans are prone to generating sparks due to blade friction or collision with debris in flammable gas environments, potentially leading to explosions. To prevent debris from entering the axial flow fan, a filter screen is installed at the end of the fan.

[0003] Existing explosion-proof axial flow fans in coal mines use at least six bolts and nuts at the end of the filter screen for a more secure fixation. These bolts and nuts are equidistant from the central axis of the filter screen, requiring the removal of multiple bolts and nuts and specialized tools for disassembly and cleaning. This makes filter screen removal and cleaning very cumbersome and reduces work efficiency. Furthermore, the small filtration area of ​​the filter screen makes it prone to clogging, requiring regular cleaning, which is also inconvenient. To address these issues, an innovative design is proposed based on the existing design. Utility Model Content

[0004] In view of this, the main objective of this utility model is to provide a coal mine explosion-proof fan to solve at least one of the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A coal mine explosion-proof fan includes: an axial flow fan, with filter screens attached to both ends of the axial flow fan, a limiting block fixed to the outer wall of the filter screen, and a limiting groove formed at the end of the axial flow fan, with the limiting block engaging inside the limiting groove; The inner side of the limiting groove has an inner cavity, and a retaining plate is installed inside the inner cavity. One end of the retaining plate is engaged with the inside of the retaining groove, which is located on one side of the limiting block. The other end of the retaining plate is connected to the deepest part of the inner cavity by a spring. The outer side of the axial flow fan has a through groove, and a connecting plate is fixed to the outer wall of the retaining plate. The end of the connecting plate passes through the inside of the through groove and is fixedly connected to the inner side of the movable ring. The movable ring is nested on the outer side of the axial flow fan.

[0006] Preferably, the half-section of the filter screen is configured as a sinusoidal structure.

[0007] Preferably, six limiting grooves and six limiting blocks are provided, and the limiting grooves and six limiting blocks are distributed at equal angles about the central axis of the filter screen.

[0008] Preferably, the end of the limiting block away from the filter screen is configured as an isosceles trapezoidal structure.

[0009] Preferably, there are six of each of the inner cavity, clamping plate, clamping groove, spring, through groove, and connecting plate. The inner cavity, clamping plate, clamping groove, spring, through groove, and connecting plate are all distributed at equal angles about the central axis of the movable ring. The inner cavity, clamping plate, clamping groove, spring, through groove, and connecting plate are all set as arc-shaped structures. The central axes of the fan, filter screen, inner cavity, clamping plate, clamping groove, spring, through groove, connecting plate, and movable ring are all coincident with each other.

[0010] Preferably, a pressure bar is fixed to the outer wall of the movable ring.

[0011] Preferably, a lifting rod is fixed in the middle of the filter screen.

[0012] Preferably, the bottom of the axial flow fan is fixed with a support frame.

[0013] Preferably, mounting plates are fixed to the bottom of both sides of the support frame, and mounting holes are equally spaced on the mounting plates.

[0014] The explosion-proof fan for coal mines of this invention has the following beneficial effects: Hold the pressure rod and lifting rod with both hands respectively, and move the pressure rod downwards. The pressure rod drives the six connecting plates to rotate simultaneously inside the six through slots through the movable ring. The six connecting plates drive the six clamping plates to rotate simultaneously inside the six inner cavities, causing the six springs to compress simultaneously. At the same time, the ends of the six clamping plates separate from the six clamping slots. At this time, the six limiting blocks disengage simultaneously. Then pull the lifting rod. The lifting rod drives the six limiting blocks to separate from the six limiting slots through the filter screen, thus facilitating the quick removal and cleaning of the filter screen from the axial flow fan. Simultaneously engage the six limiting blocks on the filter screen with the six limiting slots on the axial flow fan. Release the pressure rod. Under the elastic force of the six springs, the ends of the six clamping plates engage with the six clamping slots simultaneously, completing the simultaneous fixation of the six limiting blocks, making it easy to quickly install the filter screen back to the end of the axial flow fan. The filter screen has a sinusoidal cross-section, which increases the filter area, extends the time for cleaning the filter screen, and reduces the labor intensity of manual cleaning. The end of the limiting block, away from the filter screen, is designed as an isosceles trapezoid, which reduces the end area of ​​the limiting block and makes it easier for the end of the limiting block to be inserted into the limiting groove. Attached Figure Description

[0015] 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.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a cross-sectional view of the installation structure of the filter screen of this utility model; Figure 3 This is a cross-sectional view of the installation structure of the card plate of this utility model; Figure 4 This is a cross-sectional view of the installation of the limiting block of this utility model; Figure 5 This is a schematic diagram of the novel distribution of the active ring in this practical application.

[0017] [Explanation of Key Component Symbols] 1. Axial flow fan; 2. Filter screen; 3. Limiting groove; 4. Limiting block; 5. Inner cavity; 6. Card plate; 7. Card slot; 8. Spring; 9. Through groove; 10. Connecting plate; 11. Movable ring; 12. Pressure rod; 13. Lifting rod; 14. Support frame; 15. Mounting plate. Detailed Implementation

[0018] The method of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0019] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0023] according to Figure 1-5 This utility model provides a technical solution: a coal mine explosion-proof fan, comprising: an axial flow fan 1, with filter screens 2 attached to both ends of the axial flow fan 1, a limiting block 4 fixed to the outer wall of the filter screen 2, a limiting groove 3 opened at the end of the axial flow fan 1, the limiting block 4 engaging inside the limiting groove 3, six limiting grooves 3 and six limiting blocks 4, all equidistantly distributed about the central axis of the filter screen 2; an inner cavity 5 opened on the inner side of the limiting groove 3, a retaining plate 6 slidably installed inside the inner cavity 5, one end of the retaining plate 6 engaging inside the retaining groove 7, the retaining groove 7 being opened on one side of the limiting block 4, the other end of the retaining plate 6 being connected to the deepest part of the inner cavity 5 via a spring 8; a through groove 9 opened on the outer side of the axial flow fan 1, a connecting plate 10 fixed to the outer wall of the retaining plate 6, the end of the connecting plate 10 slidably penetrating the inside of the through groove 9 and the inner side of the movable ring 11. The movable ring 11 is fixedly connected and nested on the outside of the axial flow fan 1. Six internal cavities 5, 6 clamping plates, 7 slots, 8 springs, 9 through slots, and 10 connecting plates are provided. These components are distributed at equal angles about the central axis of the movable ring 11. All components are designed with an arc-shaped structure. The central axes of the fan 1, filter screen 2, internal cavity 5, clamping plates 6, slots 7, springs 8, through slots 9, connecting plates 10, and movable ring 11 coincide. By rotating the movable ring 11, the six clamping plates 6 can rotate simultaneously via the six connecting plates 10, ensuring that the ends of the six clamping plates 6 can simultaneously separate from the six slots 7. This allows the six limiting blocks 4 to disengage simultaneously, facilitating the quick removal and cleaning of the filter screen 2.

[0024] In this example, the half-section of filter screen 2 is set as a sinusoidal structure, which increases the filtration area of ​​filter screen 2, extends the cleaning time of filter screen 2, and reduces the labor intensity of manual labor.

[0025] In this example, the end of the limiting block 4, which is far from the filter screen 2, is set as an isosceles trapezoidal structure, which reduces the end area of ​​the limiting block 4 and makes it easier for the end of the limiting block 4 to be inserted into the limiting groove 3.

[0026] In this example, the outer wall of the movable ring 11 is fixed with a pressure rod 12, which facilitates the rotation of the movable ring 11.

[0027] In this example, a lifting rod 13 is fixed in the middle of the filter screen 2, which makes it easy to hold the filter screen 2 by hand.

[0028] In this example, the bottom of the axial flow fan 1 is fixed with a support frame 14, which is used to support the axial flow fan 1.

[0029] In this example, mounting plates 15 are fixed to the bottom of both sides of the support frame 14. Mounting holes are provided at equal intervals on the mounting plates 15. The axial flow fan 1 can be fixed in the preset position through the mounting holes and bolts.

[0030] Working principle: such as Figure 3 As shown, all six springs 8 are in a compressed state. Under the elastic force of the six springs 8, the ends of the six clamping plates 6 and the six clamping slots 7 can be tightly engaged, which is beneficial for the fixed connection between the filter screen 2 and the end of the axial flow fan 1. When the filter screen 2 needs to be removed for cleaning, hold the pressure rod 12 and the lifting rod 13 with both hands respectively, and move the pressure rod 12 downward. The pressure rod 12 drives the six connecting plates 10 to rotate simultaneously inside the six through slots 9 through the movable ring 11. The six connecting plates 10 drive the six clamping plates 6 to rotate simultaneously inside the six inner cavities 5, so that the six springs 8 are compressed simultaneously. At the same time, the ends of the six clamping plates 6 separate from the six clamping slots 7 simultaneously. At this time, the six limiting blocks 4 are released from the fixation simultaneously. Then pull the lifting rod 13. The lifting rod 13 drives the six limiting blocks 4 to separate from the six limiting slots 3 simultaneously through the filter screen 2, so as to facilitate the quick removal and cleaning of the filter screen 2 from the axial flow fan 1. After the filter screen 2 is cleaned, the six limiting blocks 4 on the filter screen 2 are simultaneously engaged with the six limiting slots 3 on the axial flow fan 1. The pressure rod 12 is released, and under the elastic force of the six springs 8, the ends of the six clamping plates 6 are simultaneously engaged with the six clamping slots 7, thus completing the simultaneous fixation of the six limiting blocks 4, making it convenient for the filter screen 2 to be quickly installed back to the end of the axial flow fan 1.

[0031] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A coal mine explosion-proof fan, characterized in that, include: An axial flow fan (1) has filter screens (2) attached to both ends of the axial flow fan (1). A limiting block (4) is fixed to the outer wall of the filter screen (2). A limiting groove (3) is opened at the end of the axial flow fan (1). The limiting block (4) is engaged inside the limiting groove (3). The inner side of the limiting groove (3) is provided with an inner cavity (5), and a card plate (6) is installed inside the inner cavity (5). One end of the card plate (6) is engaged inside the card groove (7). The card groove (7) is opened on one side of the limiting block (4). The other end of the card plate (6) is connected to the deepest part of the inner cavity (5) through a spring (8). The outer side of the axial flow fan (1) is provided with a through groove (9). A connecting plate (10) is fixed on the outer wall of the card plate (6). The end of the connecting plate (10) passes through the inside of the through groove (9) and is fixedly connected to the inner side of the movable ring (11). The movable ring (11) is nested on the outer side of the axial flow fan (1).

2. The explosion-proof fan for coal mines according to claim 1, characterized in that: The half-section of the filter screen (2) is set as a sinusoidal structure.

3. The explosion-proof fan for coal mines according to claim 1, characterized in that: Six limiting grooves (3) and six limiting blocks (4) are provided, and the limiting grooves (3) and six limiting blocks (4) are distributed at equal angles about the central axis of the filter screen (2).

4. The explosion-proof fan for coal mines according to claim 3, characterized in that: The end of the limiting block (4) away from the filter screen (2) is set as an isosceles trapezoidal structure.

5. The explosion-proof fan for coal mines according to claim 1, characterized in that: The inner cavity (5), the card plate (6), the card slot (7), the spring (8), the through slot (9) and the connecting plate (10) are all provided in six units. The inner cavity (5), the card plate (6), the card slot (7), the spring (8), the through slot (9) and the connecting plate (10) are all distributed at equal angles about the central axis of the movable ring (11). The inner cavity (5), the card plate (6), the card slot (7), the spring (8), the through slot (9) and the connecting plate (10) are all set as arc-shaped structures. The central axes of the fan (1), the filter screen (2), the inner cavity (5), the card plate (6), the card slot (7), the spring (8), the through slot (9), the connecting plate (10) and the movable ring (11) are all coincident with each other.

6. The explosion-proof fan for coal mines according to claim 1, characterized in that: A pressure rod (12) is fixed to the outer wall of the movable ring (11).

7. A coal mine explosion-proof fan according to claim 1, characterized in that: A lifting rod (13) is fixed in the middle of the filter screen (2).

8. A coal mine explosion-proof fan according to claim 1, characterized in that: The bottom of the axial flow fan (1) is fixed with a support frame (14).

9. A coal mine explosion-proof fan according to claim 8, characterized in that: The support frame (14) has mounting plates (15) fixed on both sides of the bottom, and mounting holes are provided at equal intervals on the mounting plates (15).

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