Detachable filter screen of dust removal fan for coal mine

Abstract

The utility model discloses a detachable filter screen of dust removal fan for coal mine is connected in the dust chamber of dust removal fan for coal mine, and the top of dust chamber forms the filter hole of rectangular array, and the filter hole is connected with the annular connecting plate, and the connecting plate forms two connecting grooves extending downward from the top, and the two connecting grooves are axisymmetric along the cross section of connecting plate, and the filter screen is cylindrical filter cartridge, and the top of filter cartridge is connected with the support rod extending along its radial, so as to fix filter cartridge on connecting plate through the cooperation of support rod and connecting groove. The utility model discloses filter cartridge when connecting with dust chamber adopts the plug-in connection of using the cooperation of connecting plate and filter cartridge, and provides the guidance for the connection of both through the cooperation of support rod and connecting groove, and compared with the mode of using the thread connection, can greatly reduce the time of dismounting and installing, and improve the overall maintenance efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of dust removal fans for coal mines, and specifically relates to a detachable filter screen for dust removal fans for coal mines. Background Technology

[0002] Dust collector fans for coal mines are ventilation and purification equipment specifically designed for the high-dust environment of coal mining. Their core function is to reduce the dust concentration (especially respirable dust such as PM2.5) in the workplace through physical filtration, preventing pneumoconiosis and explosion risks. The structure of a dry dust collector for coal mines mainly includes a filter unit, a dust removal system, a dust collection and discharge mechanism, a fan system, and a control system. Its operation involves four stages: negative suction, filter cartridge interception, pulse cleaning, and dust discharge. Although dry dust collectors for coal mines have high dust removal efficiency, the maintenance of the filter unit remains a pain point. For example, the design of the filter unit's disassembly structure is problematic. Traditional threaded connections are difficult to disassemble, and while existing quick-release structures have solved the disassembly difficulty, the sealing of the filter cartridge remains an issue, allowing dust-laden gas to easily leak directly from the connection between the filter cartridge and the top of the dust chamber into the clean air chamber. Furthermore, due to the limitations of the filter unit's disassembly structure, maintenance or replacement of the filter cartridge requires shutdown, affecting the continuity of mining operations.

[0003] Based on the above problems, it is necessary to optimize and improve the filter cartridge disassembly structure of the existing filter unit. Utility Model Content

[0004] This utility model provides a detachable filter screen for a dust removal fan used in coal mines to solve at least one of the above-mentioned technical problems.

[0005] The technical solution adopted by this utility model is as follows: a detachable filter screen for a coal mine dust collector fan, connected to the dust chamber of the coal mine dust collector fan, wherein a rectangular array of filter holes is formed on the top of the dust chamber, and an annular connecting plate is connected above the filter holes. Two connecting grooves extending downward from the top are formed on the connecting plate, and the two connecting grooves are axially symmetrical along the cross-section of the connecting plate. The filter screen is a cylindrical filter cylinder, and a support rod extending radially is connected to the top of the filter cylinder, so that the filter cylinder is fixed on the connecting plate by the cooperation of the support rod and the connecting grooves.

[0006] In a preferred embodiment, the connecting groove includes a falling portion extending axially along the connecting plate and a rotating portion extending circumferentially along the connecting plate.

[0007] In a preferred embodiment, the rotating part extends in a spiral shape.

[0008] In a preferred embodiment, the filter cartridge includes a hollow filter element, a lower cover connected to the bottom of the filter element, and an upper sleeve connected to the top of the filter element. The upper sleeve includes a top sealing portion and a bottom transition portion, and the support rod is connected to the transition portion.

[0009] In a preferred embodiment, the transition portion includes a plurality of transition sealing rings with increasing diameter from bottom to top.

[0010] In a preferred embodiment, the upper sleeve is made of sponge or latex, and the tight-fitting part is interference-fitted with the connecting plate.

[0011] In a preferred embodiment, the top of the upper sleeve has two connecting seats symmetrically distributed along its radial direction, and a detachable handle is connected between the two connecting seats.

[0012] In a preferred embodiment, the detachable handle includes a first arc-shaped arm and a second arc-shaped arm rotatably connected between the two connecting seats.

[0013] In a preferred embodiment, a guide tube is sleeved on the outer side of the connecting plate, and the bottom of the guide tube has an avoidance groove that cooperates with the support rod.

[0014] In a preferred embodiment, a locking ring is formed on the top of the dust chamber to cooperate with the guide tube, and a fastening protrusion is formed on the side of the locking ring facing the connecting plate.

[0015] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows: 1. As a preferred embodiment of this utility model, by using an insert connection between the connecting plate and the filter cartridge, and by using the cooperation of the support rod and the connecting groove to guide the connection between the two, the disassembly and installation time can be greatly reduced and the overall maintenance efficiency can be improved compared with the threaded connection method.

[0016] 2. As a preferred embodiment of this utility model, by utilizing the cooperation of the falling part and the rotating part, the tightness of the filter cartridge connection structure can be improved, and the position of the filter cartridge can be avoided from being affected by the suction force of the extraction fan after the connection is completed. In particular, when the rotating part at the bottom is spiral, the filter cartridge must overcome its own weight and the friction between the support rod and the connecting groove in order to change its position under the action of the extraction fan.

[0017] 3. In a preferred embodiment of this utility model, the cooperation between the guide tube and the locking ring improves the sealing of the connecting plate, allowing the clean air discharged from the filter cartridge to rise along the connecting plate. It also further secures the position of the filter cartridge. Furthermore, the installation and removal of the guide tube can be performed online without shutting down the system, reducing overall downtime for filter cartridge maintenance. Attached Figure Description

[0018] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the dust removal fan for coal mines according to the present invention. Figure 2 This is a schematic diagram of the dust chamber and clean air chamber structure of a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of a connecting groove structure according to a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of another connecting groove structure according to a preferred embodiment of the present invention; Figure 5 This is a schematic diagram of another connecting groove structure according to a preferred embodiment of the present utility model; Figure 6 This is a schematic diagram of the overall structure of the filter cartridge according to a preferred embodiment of the present invention; Figure 7 This is a schematic diagram of the joint and transition sections of a preferred embodiment of the present invention. Figure 8 This is a schematic diagram of the disassembly and assembly handle structure in the lowered state of a preferred embodiment of the present invention. Figure 9 This is a schematic diagram of the disassembly and assembly handle structure in the open state of a preferred embodiment of the present invention. Figure 10 This is a schematic diagram of the assembly structure of the guide tube, the locking ring, and the connecting plate in a disassembled state according to a preferred embodiment of the present invention. Figure 11 This is a schematic diagram of the combined structure of the guide tube, the locking ring, and the connecting plate in a preferred embodiment of the present invention.

[0019] Figure label: 1. Dust chamber; 10. Filter hole; 11. Connecting plate; 110. Connecting groove; 111. Drop section; 112. Rotating section; 12. Guide tube; 120. Clearance groove; 13. Positioning ring; 2. Filter cartridge; 20. Support rod; 21. Filter element; 22. Lower cover; 23. Upper sleeve; 231. Sealing part; 232. Transition part; 233. Transition sealing ring; 24. Connecting seat; 25. Removable handle; 251. First arc-shaped arm; 252. Second arc-shaped arm; 3. Clean air chamber; 4. Ash unloading device; 5. Vacuum cover; 6. Exhaust fan. Detailed Implementation

[0020] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0022] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0025] A preferred embodiment, such as Figure 1 The diagram shows the structural principle of a dust collector fan used in coal mines. Specifically, the main structure of the dust collector fan includes a dust collection hood 5 for absorbing dust-laden gas and an exhaust fan 6. The core working area of ​​the dust collector fan is located between the dust collection hood 5 and the exhaust fan 6, which is typically configured as a box-type structure containing a top clean air chamber 3, a middle dust chamber 1, and a bottom ash discharge device 4. During operation, the exhaust fan 6 provides traction energy to the dust-laden gas, causing it to enter the dust chamber 1 from the dust collection hood 5. The dust chamber 1 contains multiple hollow filter cartridges 2. After entering the dust chamber 1, the dust-laden gas passes through the filter cartridges 2 and enters the clean air chamber 3, where it is then extracted and discharged by the exhaust fan 6. When the dust-laden gas passes through the filter cartridge 2, the dust in the dust-laden gas is blocked on the outside of the filter cartridge 2. When too much dust accumulates on the outside of the filter cartridge 2, the filter cartridge 2 is back-blown by the back-blowing device, so that the dust falls into the dust discharge device 4 at the bottom and is discharged through the dust discharge device 4.

[0026] like Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the detachable filter screen for the coal mine dust collector in this embodiment is applicable to the aforementioned coal mine dust collector. Specifically, the filter screen is connected to the dust chamber 1 of the coal mine dust collector, and its shape is a cylindrical filter cartridge 2. The top of the dust chamber 1 has a rectangular array of filter holes 10. Preferably, the filter holes 10 are arranged in multiple matrix groups to facilitate group operation when maintaining and replacing the filter cartridge 2, reducing equipment downtime for maintenance. An annular connecting plate 11 is connected above the filter holes 10. Two connecting grooves 110 extending downward from the top are formed on the connecting plate 11. The two connecting grooves 110 are axially symmetrical along the cross-section of the connecting plate 11. A support rod 20 extending radially is connected to the top of the filter cartridge 2 to fix the filter cartridge 2 to the connecting plate 11 through the cooperation of the support rod 20 and the connecting grooves 110. In this invention, the filter cartridge 2 is connected to the dust chamber 1 by an insertion connection using a connecting plate 11. The connection is guided by the support rod 20 and the connecting groove 110. Compared with a threaded connection, this method can significantly reduce disassembly and installation time and improve overall maintenance efficiency.

[0027] Furthermore, the connecting groove 110 includes a falling portion 111 extending axially along the connecting plate 11 and a rotating portion 112 extending circumferentially along the connecting plate 11. Specifically, the falling portion 111 and the rotating portion 112 can be coupled in the following two ways: Method 1, refer to Figure 5 The rotating part 112 and the falling part 111 are in an "L" shape. During installation, the support rod 20 is first moved downward along the falling part 111. When it reaches the bottom of the falling part 111, the filter cylinder 2 is rotated to move the support rod 20 horizontally along the rotating part 112. The disassembly is the reverse of the above steps.

[0028] Method 2, refer to Figure 3 and Figure 4 The rotating part 112 extends in a spiral shape. The positions of the rotating part 112 and the falling part 111 can be either "rotating part 112 on top, falling part 111 on the bottom" or "falling part 111 on the bottom, rotating part 112 on top". Installation and disassembly are similar to method one, except that the rotating part 112 moves downwards while rotating.

[0029] By utilizing the cooperation of the falling part 111 and the rotating part 112, the tightness of the filter cartridge 2 connection structure can be improved, avoiding the influence of the suction force of the exhaust fan 6 after the connection is completed, which would cause the position of the filter cartridge 2 to change. In particular, when the rotating part 112 at the bottom is spiral, the filter cartridge 2 must overcome its own weight and the friction between the support rod 20 and the connecting groove 110 in order to change its position under the action of the exhaust fan 6.

[0030] A preferred embodiment, referring to Figure 6, Figure 7 The filter cartridge 2 includes a hollow filter element 21, a lower cover 22 connected to the bottom of the filter element 21, and an upper sleeve 23 connected to the top of the filter element 21. The upper sleeve 23 includes a top sealing portion 231 and a bottom transition portion 232, and a support rod 20 is connected to the transition portion 232.

[0031] Furthermore, the transition portion 232 includes a plurality of transition sealing rings 233 whose diameter increases from bottom to top.

[0032] Furthermore, the upper sleeve 23 is made of sponge or latex, and the tight-fitting part 231 is interference-fitted with the connecting plate 11.

[0033] By utilizing the fit between the tight-fitting part 231 and the transition part 232 of the upper sleeve 23, the filter cartridge 2 can be easily inserted into the connecting plate 11, and a stable seal can be formed to prevent gas in the dust chamber 1 from escaping from the connection between the filter cartridge 2 and the connecting plate 11, thus ensuring the filtration and dust removal effect. The flexible material of the upper sleeve 23 also facilitates its connection, further enhancing its sealing performance while ensuring its quick-release structure.

[0034] A preferred embodiment, referring to Figure 8 , Figure 9 The top of the upper sleeve 23 has two connecting seats 24 symmetrically distributed along its radial direction, and a detachable handle 25 is connected between the two connecting seats 24.

[0035] Furthermore, the detachable handle 25 includes a first arc-shaped arm 251 and a second arc-shaped arm 252 rotatably connected between the two connecting seats 24. The diameters of the first arc-shaped arm 251 and the second arc-shaped arm 252 are larger than the diameter of the hollow portion of the filter cartridge 2, thereby avoiding obstruction of the hollow portion of the filter cartridge 2. The detachable handle 25 facilitates the installation and removal of the filter cartridge 2, and provides convenience during use. Figure 9 As shown, lift the two curved arms, as shown after installation and disassembly. Figure 8 As shown, lower the two curved arms.

[0036] A preferred embodiment, referring to Figure 10 , Figure 11 A guide tube 12 is fitted onto the outer side of the connecting plate 11. The bottom of the guide tube 12 has a relief groove 120 that mates with the support rod 20. A retaining ring 13 that mates with the guide tube 12 is formed on the top of the dust chamber 1. The retaining ring 13 has a fastening protrusion on the side facing the connecting plate 11. By utilizing the cooperation of the guide tube 12 and the retaining ring 13, the sealing of the connecting plate 11 can be improved, allowing the clean air discharged from the filter cartridge 2 to rise along the connecting plate 11. On the other hand, the position of the filter cartridge 2 can also be further fixed. At the same time, the installation and removal of the guide tube 12 can be carried out online without stopping the machine, reducing the overall downtime for filter cartridge 2 maintenance.

[0037] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0038] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0039] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A detachable filter screen for a coal mine dust collector fan, connected to the dust chamber (1) of the coal mine dust collector fan, characterized in that, The dust chamber (1) has a rectangular array of filter holes (10) at the top. An annular connecting plate (11) is connected above the filter holes (10). Two connecting grooves (110) extending downward from the top are formed on the connecting plate (11). The two connecting grooves (110) are axially symmetrical along the cross-section of the connecting plate (11). The filter screen is a cylindrical filter cartridge (2). A support rod (20) extending radially is connected to the top of the filter cartridge (2) so that the filter cartridge (2) is fixed on the connecting plate (11) by the cooperation of the support rod (20) and the connecting grooves (110).

2. The detachable filter screen for a coal mine dust collector according to claim 1, characterized in that, The connecting groove (110) includes a falling portion (111) extending axially along the connecting plate (11) and a rotating portion (112) extending circumferentially along the connecting plate (11).

3. The detachable filter screen for a coal mine dust collector according to claim 2, characterized in that, The rotating part (112) extends in a spiral shape.

4. The detachable filter screen for a coal mine dust collector according to claim 1, characterized in that, The filter cartridge (2) includes a hollow filter element (21), a lower cover (22) connected to the bottom of the filter element (21), and an upper sleeve (23) connected to the top of the filter element (21). The upper sleeve (23) includes a top sealing part (231) and a bottom transition part (232). The support rod (20) is connected to the transition part (232).

5. The detachable filter screen for a coal mine dust collector according to claim 4, characterized in that, The transition section (232) includes a plurality of transition sealing rings (233) whose diameter increases from bottom to top.

6. The detachable filter screen for a coal mine dust collector according to claim 4 or 5, characterized in that, The upper sleeve (23) is made of sponge or latex, and the tight-fitting part (231) is interference-fitted with the connecting plate (11).

7. The detachable filter screen for a coal mine dust collector according to claim 4, characterized in that, The top of the upper sleeve (23) has two connecting seats (24) symmetrically distributed along its radial direction, and a detachable handle (25) is connected between the two connecting seats (24).

8. The detachable filter screen for a coal mine dust collector according to claim 7, characterized in that, The detachable handle (25) includes a first arcuate arm (251) and a second arcuate arm (252) rotatably connected between the two connecting seats (24).

9. The detachable filter screen for a coal mine dust collector according to claim 1, characterized in that, The outer side of the connecting plate (11) is fitted with a guide tube (12), and the bottom of the guide tube (12) has a relief groove (120) that cooperates with the support rod (20).

10. The detachable filter screen for a coal mine dust collector according to claim 9, characterized in that, The top of the dust chamber (1) is formed with a locking ring (13) that cooperates with the guide tube (12), and the locking ring (13) has a fastening protrusion on the side facing the connecting plate (11).

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