Powder leakage prevention filter element for powder filter

Abstract

The utility model relates to a powder leakage prevention filter element for a powder filter, which comprises a filter element, an upper sealing cover and a lower sealing cover are respectively arranged on the upper side and the lower side of the filter element, and the upper end and the lower end of the filter element are embedded into the inner side areas of the upper sealing cover and the lower sealing cover. In addition, a supporting pipe arranged in the vertical axial direction is additionally arranged at the upper end of the lower sealing cover, and the periphery of the supporting pipe is sleeved with a plurality of limiting mechanisms. By adjusting the outer diameters of the limiting mechanisms, necessary supporting force can be provided for the filter element, and the parts, embedded into the inner side areas of the upper sealing cover and the lower sealing cover, of the upper end and the lower end of the filter element can be tightly contacted with the upper sealing cover and the lower sealing cover, so that sealing connection between the filter element and the upper sealing cover and between the filter element and the lower sealing cover is realized. The powder leakage phenomenon can be effectively prevented through the sealing connection design. Meanwhile, the supporting effect of the limiting mechanism on the filter element also ensures that the filter element can normally exert the function in the actual use process, and the wrinkle structure at the side end of the filter element can fully and effectively intercept the dust.

Description

Technical Field

[0001] This utility model relates to the field of filter element technology, and in particular to a leak-proof powder filter element for powder filters. Background Technology

[0002] Cartridge filters are widely used in various gas application fields, including metallurgy, chemical industry, petroleum, papermaking, pharmaceuticals, food, mining, power, urban and household applications. In this type of filter, when powdery materials enter the device equipped with filter elements, their impurities are intercepted by the filter elements, while the purified gas is discharged through the filter outlet.

[0003] Currently, powder filters typically consist of upper and lower covers and a filter element. The upper and lower ends of the filter element are connected to the upper and lower covers by adhesive sealing. In addition, the inside of the filter element usually has a support member to enhance the overall deformation resistance of the device and ensure that the filter element with multiple pleats can fully unfold.

[0004] In existing technologies, support components typically employ annular metal wire mesh. The wire mesh utilizes its inherent elasticity to unfold the filter element, and its structural toughness is adjusted to enhance its resistance to deformation. However, existing technologies have limitations in practical applications. If the wire mesh can be bent to a large extent, its resistance to deformation is often weak; conversely, if its bending ability is limited, the filter element faces a high risk of breakage during the initial installation process, when it is fitted over the wire mesh.

[0005] Therefore, this study proposes a novel leak-proof filter element for powder filters, aiming to improve overall deformation resistance and ensure convenient installation. Simultaneously, this filter element provides effective support during use to meet the performance requirements of the filter. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention proposes a leak-proof filter element for powder filters. This filter element is designed for easy installation and provides effective support during use, thus overcoming the difficulty in balancing ease of installation and filter element support performance in existing devices.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A powder filter element for a powder filter includes an upper cover and a lower cover, with the filter element disposed between the upper and lower covers. It also includes an axially extending support tube, which is fixedly connected to the lower cover. A driven rod is inserted into the support tube and movably connected to the upper cover. Multiple limiting mechanisms are sleeved on the outside of the support tube, located inside the filter element. These limiting mechanisms are arranged equidistantly from top to bottom. Each limiting mechanism includes two driven rings arranged axially. Multiple follower rods are rotatably connected to the side ends of the two driven rings, and the follower rods on the two driven rings correspond one-to-one. Two follower rods on the two driven rings, located in the same vertical plane, are rotatably connected at their ends near the inner wall of the filter element.

[0009] Preferably, each driven ring is fixedly connected to a plurality of limiting shafts on its inner side. The plurality of limiting shafts are arranged equidistantly around the central axis of the driven ring. Furthermore, the support tube is provided with a limiting groove of inverted L-shaped structure in the vertical plane for the plurality of limiting shafts. The limiting shafts are inserted into the vertical section of the corresponding limiting groove. A driving rod is inserted into the horizontal section of each limiting groove. The driving rod is fixedly connected to the side end of the driven rod. The side end of the support tube is provided with a plurality of connecting grooves. The plurality of connecting grooves correspond one-to-one with the plurality of limiting shafts on a single driven ring. The plurality of connecting grooves are respectively connected to the horizontal sections of the plurality of limiting grooves that are adjacent and in the same vertical plane.

[0010] Preferably, the upper end of the support tube is provided with an external thread, and the lower end of the upper cover is coaxially fixedly connected with an internal thread tube to the support tube. The upper cover is rotatably connected to the driven rod. When the internal thread tube is sleeved above the support tube, the drive rod is located in the horizontal section of the limiting groove.

[0011] Preferably, each of the limiting mechanisms is provided with multiple pull ropes on its inner side, and the multiple pull ropes correspond one-to-one with multiple limiting shafts on a single driven ring. Furthermore, the two ends of each pull rope are fixedly connected to two corresponding limiting shafts on two driven rings, and a positioning shaft is provided in the middle section of each pull rope. The middle section of the pull rope is wound around the side end of the positioning shaft, and the height of each positioning shaft is greater than the height of the corresponding limiting mechanism. Each positioning shaft is fixedly connected to a support tube.

[0012] Preferably, a positioning rod is movably connected between the two driven rings in each of the limiting mechanisms, and a compression spring is sleeved on the outside of the positioning rod. The two axial ends of the compression spring respectively abut against the near ends of the corresponding two driven rings.

[0013] Preferably, two follower rods rotatably connected within each limiting mechanism are rotatably connected to a mounting plate at one end near the inner wall of the filter element, and a sponge pad is fixedly connected to one end of each mounting plate near the inner wall of the filter element.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention features a support tube at the upper end of the lower cover, with a driven rod embedded within it. The synergistic effect between the support tube and the driven rod significantly improves the overall deformation resistance of the device, ensuring the upper and lower covers remain coaxial. Simultaneously, multiple limiting mechanisms are mounted on the outside of the support tube. By adjusting the outer diameter of these mechanisms, the necessary support force is provided to the filter element, ensuring that the portions of the filter element embedded in the inner areas of the upper and lower covers are in close contact, thus achieving a sealed connection between the filter element and the upper and lower covers. This sealed connection structure effectively prevents dust leakage. Furthermore, the supporting effect of the limiting mechanisms on the filter element ensures that it can perform its filtration function normally in practical applications, and the pleated structure on the side of the filter element effectively intercepts dust. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the lower cover of this utility model.

[0018] Figure 3 This is a schematic diagram of the limiting mechanism and the support tube of this utility model.

[0019] Figure 4 This is a schematic diagram of the overall structure of the limiting mechanism of this utility model.

[0020] Figure 5 This is a schematic diagram showing the cooperation relationship between the positioning rod and the limiting shaft of this utility model.

[0021] Figure 6 This is a schematic diagram showing the connection between the limiting ring and the follower shaft of this utility model.

[0022] In the diagram: 1. Upper cover; 2. Filter element; 3. Lower cover; 4. Limiting mechanism; 401. Sponge pad; 402. Mounting plate; 403. Driven ring; 404. Pull rope; 405. Limiting shaft; 406. Positioning rod; 407. Compression spring; 408. Follower rod; 5. Driven rod; 6. Internally threaded tube; 7. Support tube; 8. Drive rod; 9. Connecting groove; 10. Limiting groove; 11. Positioning shaft. Detailed Implementation

[0023] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", 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.

[0025] Please refer to Figure 1 As shown, the powder filter element for powder filters disclosed in this application has a structural design consistent with existing technology devices. The filter element 2 mainly consists of two parts: an upper cover 1 and a lower cover 3, with the filter element 2 itself carefully positioned between these two covers.

[0026] To effectively improve sealing performance, the upper and lower ends of filter element 2 are embedded into the inner areas of upper cover 1 and lower cover 3, respectively. During the operation of filter element 2, the outer wall of filter element 2 is in close contact with the inner walls of upper cover 1 and lower cover 3, achieving a reliable sealing connection.

[0027] like Figure 2 As shown, compared to existing technology devices, in order to further improve its stability and durability, the filter element 2 is equipped with a support tube 7 arranged along the vertical axis. This support tube 7 is coaxially and stably connected to the lower cover 3.

[0028] A driven rod 5 is inserted into the internal space of the support tube 7.

[0029] Multiple limiting mechanisms 4 are provided around the support tube 7. These limiting mechanisms 4 are all located in the inner area of ​​the filter element 2 and are arranged in order from top to bottom. By adjusting the outer diameter of the limiting mechanism 4, that is, changing the distance between its outer side wall and the inner side wall of the filter element 2, effective support for the inner wall of the filter element 2 is achieved. This design ensures that the outer side wall of the filter element 2 can fit tightly against the inner side walls of the upper cover 1 and the lower cover 3, thereby achieving a sealed connection between the outer side wall of the filter element 2 and the inner side walls of the upper cover 1 and the lower cover 3.

[0030] Specifically, such as Figure 4 and Figure 6As shown, each limiting mechanism 4 includes two driven rings 403 arranged vertically side by side. Multiple follower rods 408 are mounted on the sides of these two driven rings 403 via a rotatable connection. It is noteworthy that the follower rods 408 on the two driven rings 403 have a one-to-one correspondence, meaning they are structurally matched. Therefore, when the two follower rods 408 on the two driven rings 403 are located in the same vertical plane, their ends near the inner wall of the filter element 2 can also form a rotatable connection. Through this design, the tilt angle of the central axis of the follower rod 408 can be changed by adjusting the distance between the two driven rings 403, meaning the projected length of the follower rod 408 on the horizontal plane will change accordingly. This mechanism further enables the adjustment of the outer diameter of the limiting mechanism 4, thus changing the distance between the outer wall of the limiting mechanism 4 and the inner wall of the filter element 2.

[0031] Furthermore, within each limiting mechanism 4, a positioning rod 406 is movably connected between the two driven rings 403. A compression spring 407 is sleeved on the outside of the positioning rod 406 to constrain the position of the compression spring 407.

[0032] Therefore, the two axial ends of these compression springs 407 abut against the near ends of the corresponding two driven rings 403, thus providing the necessary elasticity and adjustment capability for the entire limiting mechanism 4. In this way, the two driven rings 403 tend to move in opposite directions when not affected by external forces. This ensures that the outer diameter of the limiting mechanism 4 remains at its minimum in the initial state, facilitating the placement of the filter element 2 on the outside of the multiple limiting mechanisms 4.

[0033] Specifically, such as Figure 4 , Figure 5 As shown, each driven ring 403 has multiple through holes that penetrate the entire ring, and these through holes are evenly distributed around the central axis of the driven ring 403. In addition, the through holes on two driven rings 403 correspond to each other, and a positioning rod 406 is inserted into each pair of corresponding through holes, thereby forming a sliding connection between the positioning rod 406 and the driven ring 403.

[0034] Meanwhile, each locating rod 406 has a locating nut threaded to both ends along its axial direction, and the locating nuts are located at the relatively far ends of the two driven rings 403. This design limits the maximum distance between the two driven rings 403 through the locating nuts, ensuring that the angle between the central axis of the follower rod 408 and the horizontal plane is not too large. This avoids the situation where an excessively large angle between the central axis of the follower rod 408 and the horizontal plane would require excessive vertical thrust from the two driven rings 403 during their relative movement.

[0035] Furthermore, each driven ring 403 has multiple limiting shafts 405 fixedly connected to its inner side, and these limiting shafts 405 are distributed at equal distances around the central axis of the driven ring 403.

[0036] Specifically, the central axis of each limiting shaft 405 is perpendicular to the central axis of the support tube 7. Furthermore, a sliding plate is fixedly connected to the end of each limiting shaft 405 furthest from the support tube 7, and these sliding plates correspond one-to-one with multiple driven rods 5. Through this design, multiple sliding plates can be positioned between the driven ring 403 and the positioning nut. The clamping force applied by the positioning nut to the sliding plates secures the positions of the sliding plates and the limiting shafts 405. In practical applications, this design facilitates adjustment of the position of the limiting shafts 405, specifically adjusting the length of the limiting shaft 405 protruding from the inner side of the driven ring 403, thereby ensuring that the driven ring 403 can smoothly fit onto the outer side of the support tube 7.

[0037] Furthermore, the device is equipped with multiple pull ropes 404 inside each limiting mechanism 4, and these pull ropes 404 form a precise correspondence with multiple limiting shafts 405 on a single driven ring 403. Specifically, both ends of each pull rope 404 are firmly connected to two corresponding limiting shafts 405 on two driven rings 403.

[0038] Meanwhile, to optimize the adjustment function, a positioning shaft 11 is provided in the middle section of each pull rope 404, and the middle section of the pull rope 404 is cleverly wrapped around the side end of the positioning shaft 11. It is worth noting that the height of each positioning shaft 11 is set to be greater than the height of its corresponding limiting mechanism 4 to ensure that the pull rope 404 has sufficient adjustment space. This design ensures that the two driven rings 403 can always maintain a moving state of facing or moving away from each other. In practical applications, by adjusting the height variation range of a single driven ring 403, the effect of changing the projected length of the follower rod 408 in the horizontal direction can be significantly enhanced.

[0039] Therefore, in practical applications, this device only requires adjusting the vertical height of a single driven ring 403 to adjust the outer diameter of the limiting mechanism 4, ensuring that the filter element 2 can be easily fitted onto the outside of the multiple limiting mechanisms 4 during the initial assembly stage. In actual use, the multiple limiting mechanisms 4 provide sufficient support to the inner wall of the filter element 2, thereby achieving a tight fit between the outer wall of the filter element 2 and the inner walls of the upper and lower caps 1 and 3.

[0040] For details, please refer to Figure 3 and Figure 4As shown, to ensure effective cooperation between the support tube 7 and the limiting shaft 405, the support tube 7 has inverted L-shaped limiting grooves 10 for multiple limiting shafts 405. The limiting shafts 405 are inserted into the vertical sections of the corresponding limiting grooves 10. This design not only ensures the stability of the limiting shaft 405 (i.e., the driven ring 403) in the vertical direction, but also provides it with the necessary adjustment range.

[0041] Each limiting groove 10 has a drive rod 8 inserted into its horizontal section. The drive rod 8 is fixedly connected to the side of the driven rod 5, thus ensuring an effective linkage mechanism between the drive rod 8 and the limiting shaft 405. When the drive rod 8 rotates into the vertical section of the corresponding limiting groove 10, the drive rod 8 can press the limiting shaft 405 downward, thereby achieving precise adjustment of the positions of the two driven rings 403.

[0042] Furthermore, the side end of the support tube 7 is provided with multiple connecting grooves 9, which correspond one-to-one with multiple limiting shafts 405 configured on a single driven ring 403. The multiple connecting grooves 9 are respectively connected to the horizontal sections of multiple adjacent limiting grooves 10 located in the same vertical plane, thereby ensuring the continuity and coordination of the overall structure, ensuring that a single driven rod 5 can be smoothly inserted into the support tube 7 from above, and ensuring that there is no travel interference between the drive rod 8 and the support tube 7 during this process.

[0043] At the same time, such as Figure 2 As shown, the upper end of the support tube 7 is designed with an external thread structure, while the lower end of the upper cover 1 is coaxially fixedly connected to an internally threaded tube 6. This internally threaded tube 6 matches the external thread of the support tube 7. This design greatly facilitates the installation and disassembly of the upper cover 1 and the lower cover 3. Simultaneously, the upper cover 1 and the driven rod 5 are rotatably connected, allowing the driven rod 5 to rotate with the upper cover 1. When the driven rod 5 rotates to the same vertical plane as the vertical section of the limiting groove 10, due to the rotatable connection between the upper cover 1 and the driven rod 5, the driven rod 5 will only move up and down with the upper cover 1. At this point, a stable connection between the upper cover 1 and the lower cover 3 can be achieved, while ensuring that the drive rod 8 can drive the limiting shaft 405 to the desired position.

[0044] Therefore, when the internal threaded tube 6 of this device is sleeved above the support tube 7, the drive rod 8 will be located in the horizontal section of the limiting groove 10, thereby ensuring that the drive rod 8 is in the correct position and performs its due function, effectively avoiding stroke conflict between the drive rod 8 and the support tube 7.

[0045] Furthermore, within each limiting mechanism 4, two follower rods 408 are interconnected via a rotatable connection, and their ends near the inner wall of the filter element 2 are connected to a mounting plate 402. Each mounting plate 402 has a fixed sponge pad 401 at its end near the inner wall of the filter element 2. These sponge pads 401 effectively mitigate impact forces, thereby preventing damage to the filter element 2.

[0046] In practical application, the operation process of this utility model is as follows:

[0047] First, the operator needs to assemble the individual limiting mechanism 4 onto the outside of the support tube 7. At this time, the individual limiting mechanism 4 specifically includes a driven ring 403, a follower rod 408, a mounting plate 402, and a sponge pad 401.

[0048] Next, the operator needs to place the corresponding compression spring 407 between the two driven rings 403 and simultaneously insert the positioning rod 406 into the corresponding through hole.

[0049] Next, place the sliding plate on the outside of the positioning rod 406 and adjust the position of the limiting shaft 405 so that it inserts into the vertical section of the limiting groove 10. At this point, tighten the positioning nut and adjust the distance between the two driven rings 403 to the appropriate length.

[0050] Subsequently, the middle section of the pull rope 404 is hung on the outside of the corresponding positioning shaft 11, and the position of the upper driven ring 403 is adjusted simultaneously so that the height of its corresponding limiting shaft 405 is lower than the height of the horizontal section of the corresponding limiting groove 10. At this point, the limiting mechanism 4 is assembled. At the same time, the filter element 2 is sleeved on the outside of the multiple limiting mechanisms 4, and the lower end of the filter element 2 is inserted into the lower cover 3.

[0051] Next, the driven rod 5 is inserted into the support tube 7, at which point the drive rod 8 is located in the connecting groove 9. When the internal threaded tube 6 abuts against the upper end of the support tube 7, the drive rod 8 and the corresponding horizontal section of the limiting groove 10 are on the same horizontal plane. At this time, the upper end of the filter element 2 is inserted into the upper cover 1.

[0052] Finally, rotate the upper cover 1 to screw the internal threaded tube 6 into the support tube 7. During this process, the drive rod 8 enters the vertical section of the limiting groove 10, the relative distance between the two driven rings 403 gradually decreases, and the filter element 2 is gradually stretched open until the outer wall of the filter element 2 tightly abuts against the inner walls of the upper cover 1 and the lower cover 3. At this time, the sealing connection between the filter element 2 and the upper cover 1 and the lower cover 3 is completed simultaneously.

[0053] 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 leak-proof powder filter element for a powder filter, comprising an upper cover (1) and a lower cover (3), wherein a filter element (2) is disposed between the upper cover (1) and the lower cover (3), characterized in that: It also includes a support tube (7) with an upper and lower axis, the support tube (7) being fixedly connected to the lower cover (3), and a driven rod (5) being inserted into the support tube (7), the driven rod (5) being movably connected to the upper cover (1); Multiple limiting mechanisms (4) are sleeved on the outside of the support tube (7). The limiting mechanisms (4) are located inside the filter element (2). The multiple limiting mechanisms (4) are arranged in parallel at equal intervals from top to bottom. Each of the limiting mechanisms (4) includes two driven rings (403) arranged side by side, and multiple follower rods (408) are rotatably connected to the side ends of the two driven rings (403). The follower rods (408) on the two driven rings (403) correspond one to one, and the two follower rods (408) on the two driven rings (403) that are in the same vertical plane are rotatably connected at one end near the inner wall of the filter element (2).

2. The anti-leakage filter element for a powder filter according to claim 1, characterized in that: Each driven ring (403) is fixedly connected to a plurality of limiting shafts (405) on its inner side. The plurality of limiting shafts (405) are arranged at equal intervals around the central axis of the driven ring (403). Furthermore, the support tube (7) is provided with a limiting groove (10) with an inverted L-shaped structure in the vertical plane for the plurality of limiting shafts (405). The limiting shafts (405) are inserted into the vertical section of the corresponding limiting groove (10). A drive rod (8) is inserted inside the horizontal section of each of the limiting grooves (10), and the drive rod (8) is fixedly connected to the side end of the driven rod (5); The support tube (7) has multiple connecting grooves (9) through its side end. Each of the multiple connecting grooves (9) corresponds to a multiple limiting shaft (405) on a single driven ring (403). The multiple connecting grooves (9) are connected to the horizontal sections of multiple limiting grooves (10) that are adjacent and in the same vertical plane.

3. The anti-leakage filter element for a powder filter according to claim 2, characterized in that: The upper end of the support tube (7) is provided with an external thread, and the lower end of the upper cover (1) is coaxially fixedly connected with an internal thread tube (6) to the support tube (7). The upper cover (1) is rotatably connected to the driven rod (5). When the internal threaded tube (6) is sleeved above the support tube (7), the drive rod (8) is located in the horizontal section of the limiting groove (10).

4. The anti-leakage filter element for a powder filter according to claim 2, characterized in that: Each of the limiting mechanisms (4) is provided with a plurality of pull ropes (404) on its inner side. The plurality of pull ropes (404) correspond one-to-one with the plurality of limiting shafts (405) on a single driven ring (403). Furthermore, the two ends of each pull rope (404) are respectively fixedly connected to two corresponding limiting shafts (405) on two driven rings (403). Each of the pull ropes (404) is provided with a positioning shaft (11) in the middle section. The middle section of the pull rope (404) is wound around the side end of the positioning shaft (11). Furthermore, the height of each positioning shaft (11) is greater than the height of the corresponding limiting mechanism (4). Each positioning shaft (11) is fixedly connected to the support tube (7).

5. A powder leak-proof filter element for a powder filter according to claim 1, characterized in that: A positioning rod (406) is movably connected between the two driven rings (403) in each of the limiting mechanisms (4). A compression spring (407) is sleeved on the outside of the positioning rod (406), and the two axial ends of the compression spring (407) abut against the near ends of the corresponding two driven rings (403).

6. The anti-leakage filter element for a powder filter according to claim 1, characterized in that: The two follower rods (408) rotatably connected within each limiting mechanism (4) are rotatably connected to a mounting plate (402) at one end near the inner wall of the filter element (2), and a sponge pad (401) is fixedly connected to one end of each mounting plate (402) near the inner wall of the filter element (2).

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