A modular replaceable dry exhaust gas filter

Abstract

This utility model discloses a modular replaceable dry exhaust gas filter, including a filter housing, several filter modules, and a module pushing mechanism. The filter housing has an air inlet, an air outlet, and several maintenance ports. The filter modules are slidably housed within the filter housing. The module pushing mechanism includes a drive motor, a linear drive assembly, and a transmission assembly. The drive motor is fixedly installed within the filter housing. The linear drive assembly includes two rotating shafts symmetrically arranged at the bottom of the filter housing and a driven member. The transmission assembly connects the output end of the drive motor to the two rotating shafts, synchronously transmitting the rotational motion of the motor to the two rotating shafts, enabling the filter modules to move linearly between the filtration station within the filter housing and the replacement station corresponding to the maintenance port. This utility model aims to achieve rapid and automated replacement of filter modules, improve the continuity of equipment operation, and reduce manual intervention.

Description

Technical Field

[0001] This utility model relates to the field of dry exhaust gas filter technology, and in particular to a modular replaceable dry exhaust gas filter. Background Technology

[0002] In the field of industrial waste gas treatment, dry filters require periodic replacement of filter modules to maintain treatment efficiency. Currently, filter module replacement generally relies on manual operation, which has significant limitations: operators must stop and start the equipment, manually remove the fixing and sealing structure of the old module, remove it, and then manually install the new module. This process is not only labor-intensive and time-consuming, leading to increased system downtime and affecting continuous production, but also poses occupational health risks when treating toxic and hazardous pollutants. Existing equipment lacks an effective automated replacement mechanism, making it difficult to achieve rapid, unmanned module replacement, thus limiting the improvement of the operating efficiency and safety of waste gas treatment systems. Utility Model Content

[0003] The main purpose of this utility model is to provide a modular replaceable dry exhaust gas filter, which aims to achieve rapid and automated replacement of filter modules, improve the continuity of equipment operation, and reduce manual intervention.

[0004] To achieve the above objectives, the present invention proposes a modular replaceable dry exhaust gas filter, comprising:

[0005] A filter housing having an air inlet, an air outlet, and several maintenance ports;

[0006] A plurality of filter modules, wherein the filter modules are slidably housed within the filter housing for filtering the passing airflow, and can be extracted or pushed in through the inspection port; and

[0007] The module pushing mechanism includes a drive motor, a linear drive assembly, and a transmission assembly. The drive motor is fixedly installed inside the filter housing. The linear drive assembly includes two rotating shafts symmetrically arranged at the bottom of the filter housing, and a driven member that cooperates with the rotating shafts and is fixedly installed at the bottom of the filter module. The driven member can move axially under the drive of the rotating shafts. The transmission assembly is connected between the output end of the drive motor and the two rotating shafts to synchronously transmit the rotational motion of the motor to the two rotating shafts, so that the filter module moves linearly between the filtration station inside the filter housing and the replacement station corresponding to the inspection port.

[0008] In one possible implementation, the filter module includes a base, a filter frame, and a filter layer disposed within the filter frame; the base is L-shaped, with its bottom fixedly connected to the follower of the linear drive assembly, and its side is a sealing part, which is adapted to and forms a sealing fit with the side inspection port of the filter housing.

[0009] In one possible implementation, the sealing part is provided with an annular sealing assembly on the side facing the inspection port. The annular sealing assembly includes a main sealing strip and an auxiliary dustproof lip. The main sealing strip is a silicone strip with a trapezoidal cross section, which is interference-fitted with the sealing groove on the inner wall of the inspection port. The auxiliary dustproof lip is a hook-shaped elastic rubber strip arranged along the outer periphery of the main sealing strip and is used to scrape off the dust accumulated at the edge of the inspection port.

[0010] In one possible implementation, the inner side of the base sealing part is provided with a T-shaped groove, and a T-shaped slider adapted to the T-shaped groove is provided on one side of the filter frame. The T-shaped slider can slide along the T-shaped groove to realize the loading and unloading of the filter frame and the base.

[0011] In one possible implementation, the top of the filter frame is provided with an unlocking lever, which is linked to the T-shaped slider. Moving the unlocking lever can cause the T-shaped slider to retract and disengage from the limit of the T-shaped groove, thereby enabling the filter frame to be quickly disassembled.

[0012] In one possible implementation, the rotating shaft is a lead screw, the driven member is a nut seat adapted to the lead screw, and the nut seat is fixedly connected to the bottom of the filter module by bolts;

[0013] The transmission assembly includes a driving gear, two driven bevel gears, and two transmission shafts. The driving gear is fixedly sleeved on the output shaft end of the drive motor, and the two driven bevel gears are respectively fixed to the same end of the two lead screws. Each of the transmission shafts has a transmission gear meshing with the driving gear and a bevel gear meshing with the driven bevel gears at both ends. The transmission shafts are fixed to the bottom of the filter housing through bearing seats to realize the synchronous transmission of power from the drive motor to the two lead screws.

[0014] This invention utilizes a modular pushing mechanism to automatically move and reset the filter module within the equipment, significantly reducing manual operation intensity, time, and costs. It is particularly suitable for high-pollution conditions requiring frequent filter media replacement. The modular design allows for independent replacement of individual filter units without affecting the operation of other units, effectively improving the system's continuous operation capability. The use of a screw-nut pair and gear transmission mechanism achieves precise synchronous transmission, significantly improving maintenance efficiency and operational stability. Furthermore, the direct sealing fit between the L-shaped base and the inspection port eliminates the need for a separate inspection door and opening / closing mechanism, simplifying the overall structure and further reducing manufacturing costs. 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 the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of a module pushing mechanism according to an embodiment of the present invention;

[0018] Explanation of icon numbers:

[0019] 1. Filter housing; 11. Air inlet; 12. Air outlet; 13. Inspection port; 131. Sealing groove; 14. Filtering station; 15. Replacement station; 2. Filter module; 21. Base; 211. Sealing part; 22. Filter frame; 23. Filter layer; 3. Module pushing mechanism; 31. Drive motor; 32. Linear drive assembly; 321. Lead screw; 322. Nut seat; 33. Transmission assembly; 331. Drive gear; 332. Driven bevel gear; 333. Drive shaft; 4. Annular sealing assembly; 41. Main sealing strip; 42. Auxiliary dustproof lip; 51. T-shaped slide groove; 52. T-shaped slider; 53. Unlocking lever.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] To address the problems in the background technology, this utility model proposes a modular replaceable dry exhaust gas filter, comprising:

[0023] The filter housing 1 has an air inlet 11, an air outlet 12 and several maintenance ports 13;

[0024] A plurality of filter modules 2, wherein the filter modules 2 are slidably housed within the filter housing 1, for filtering the passing airflow, and can be extracted or pushed in through the inspection port 13; and

[0025] The module pushing mechanism 3 includes a drive motor 31, a linear drive assembly 32, and a transmission assembly 33. The drive motor 31 is fixedly installed inside the filter housing 1. The linear drive assembly 32 includes two rotating shafts symmetrically arranged at the bottom of the filter housing 1, and a driven member that cooperates with the rotating shafts and is fixedly installed at the bottom of the filter module 2. The driven member can move axially under the drive of the rotating shafts. The transmission assembly 33 is connected between the output end of the drive motor 31 and the two rotating shafts, and is used to synchronously transmit the rotational motion of the motor to the two rotating shafts so that the filter module 2 moves linearly between the filter station 14 and the replacement station 15 corresponding to the inspection port 13 inside the filter housing 1.

[0026] Combination Figure 1 and Figure 2 As shown, in this embodiment, the filter housing 1 constitutes the main frame of the equipment and is formed by welding stainless steel. An air inlet 11 is provided on one side of the housing, and an air outlet 12 is provided on the opposite side. Several maintenance ports 13 are respectively opened on the sidewalls corresponding to the positions of each filter module 2, with the number corresponding to the number of filter modules 2. The filter modules 2 are installed inside the housing via a sliding structure (such as a slide rail or groove) and can move horizontally. The module pushing mechanism 3 is located on the inner bottom of the housing and is connected to the filter modules 2 for transmission. It is used to drive the modules to switch between the filtration station 14 and the replacement station 15: the filtration station 14 is located in the middle of the housing cavity, directly facing the airflow path; the replacement station 15 corresponds to the outside of the maintenance port 13.

[0027] The internal chamber of the filter housing 1 is optimized through airflow simulation to ensure that exhaust gas enters from the inlet 11 and passes evenly through each filter module 2. Both the inlet 11 and outlet 12 adopt a flange connection structure, with rubber sealing gaskets on the flange faces for reliable connection to external pipelines via bolts. The inspection port 13 has a sealed door frame at its edge, with a silicone sealing strip embedded inside the door frame. When the filter module 2 is in the filtration station 14, it can be pressed against the module sealing frame to form a sealed cavity. A motor mounting base and a rotating shaft support are welded to the bottom of the housing for fixing the module pushing mechanism 3. The filter module 2 has a rectangular structure, including a metal frame, multiple layers of filter material, and a sealing frame. The metal frame is made of aluminum alloy profiles, combining lightweight and rust resistance. The filter material is arranged sequentially along the airflow direction as a coarse filter layer, a medium filter layer, and a fine filter layer, with the fine filter layer being an activated carbon composite filter material used to adsorb volatile organic compounds. Each layer of filter material is fixed by elastic pressure strips within the frame and can be individually disassembled and replaced.

[0028] Furthermore, the module pushing mechanism 3 includes a drive motor 31, a linear drive assembly 32, and a transmission assembly 33. The drive motor 31 is fixedly installed in the middle of the bottom side inside the filter housing 1. The linear drive assembly 32 includes two parallel and symmetrically arranged rotating shafts on the bottom surface of the housing, and a driven member that cooperates with the rotating shafts and is fixedly installed at the bottom of the filter module 2. The driven member can move axially when the rotating shafts rotate, thereby driving the entire filter module 2 to perform linear motion. The transmission assembly 33 is connected between the output end of the drive motor 31 and the two rotating shafts, and is used to synchronously transmit the rotational motion of the motor to the two rotating shafts, realizing the movement of the filter module 2 between the two workstations.

[0029] The specific working process is as follows: When the replacement procedure is triggered, the drive motor 31 drives the two rotating shafts to rotate synchronously through the transmission assembly 33, and the driven component drives the filter module 2 to move towards the inspection port 13. Since only one end of the module is connected to the drive mechanism, it slides outward along the guide bushing in a "cantilever" state. The sealing part 211 of the module gradually disengages from the sealing step inside the inspection port 13. At the same time, the dust scraper cleans the dust accumulated at the edge of the opening. Until most of the filter module 2 has moved out of the inspection port 13, it is in a state of "one end still connected, the main body exposed". After the replacement is completed, the motor runs in reverse, the drive module retracts along the original path, the sealing part 211 re-embeds into the step of the inspection port 13, the compression seal achieves a reliable seal, and the reset is completed.

[0030] In one possible implementation, the filter module 2 includes a base 21, a filter frame 22, and a filter layer 23 disposed within the filter frame 22; the base 21 is L-shaped, its bottom is fixedly connected to the follower of the linear drive assembly 32, and its side is a sealing part 211, which is adapted to the side inspection port 13 of the filter housing 1 and forms a sealing fit.

[0031] Combination Figures 1 to 2As shown, in this embodiment, the filter module 2 mainly includes a base 21, a filter frame 22, and a filter layer 23 disposed inside the filter frame 22. The base 21 is designed with an L-shaped structure, consisting of a horizontal bottom and a vertical side integrally formed. The horizontal bottom is fixedly connected to the driven component of the linear drive assembly 32, such as a nut seat 322, by bolts, thereby stably mounting the entire filter module 2 on the pushing mechanism. The vertical side of the base 21 serves as a sealing part 211, the size and shape of which are precisely adapted to the inspection port 13 on the side wall of the filter housing 1. When the filter module 2 moves to the filtration station 14 under the drive of the pushing mechanism, the sealing part 211 is precisely embedded in the inspection port 13, and the sealing element (such as a rubber sealing strip) on its surface forms an interference fit with the edge of the inspection port 13, thereby achieving a reliable seal and eliminating the need for a separate inspection door structure. The filter frame 22 is detachably installed on the side of the base 21 facing the interior of the housing. Multiple layers of filter material are arranged sequentially within the frame according to the airflow direction, such as a pre-filter coarse screen, medium-efficiency filter cotton, and an end activated carbon filter layer, to achieve graded filtration of pollutants of different particle sizes and gaseous pollutants. Each layer of filter material can be replaced independently. The L-shaped base 21 achieves a sealed fit between the module itself and the housing inspection port 13, resulting in a compact structure that eliminates the need for a separate inspection door and its locking mechanism, reducing manufacturing costs and the probability of failure. Furthermore, the modular design allows for easy disassembly and maintenance of the filter frame 22, while the base 21 and drive connection components can be reused as permanent structures, improving the equipment's economy and maintenance efficiency.

[0032] In one possible implementation, the sealing part 211 is provided with an annular sealing assembly 4 on the side facing the inspection port 13. The annular sealing assembly 4 includes a main sealing strip 41 and an auxiliary dustproof lip 42. The main sealing strip 41 is a silicone strip with a trapezoidal cross section, which is press-fitted with the sealing groove 131 on the inner wall of the inspection port 13. The auxiliary dustproof lip 42 is a barbed elastic rubber strip, which is arranged along the outer periphery of the main sealing strip 41 and is used to scrape off the dust accumulated at the edge of the inspection port 13.

[0033] Combination Figures 1 to 2As shown, in this embodiment, an annular sealing assembly 4 is provided on the side of the sealing part 211 facing the inspection port 13 of the filter housing 1. This assembly adopts a composite sealing structure, which is designed to achieve long-term sealing and adapt to harsh industrial environments. The annular sealing assembly 4 is composed of a main sealing strip 41 and an auxiliary dustproof lip 42 (not shown in the figure). The main sealing strip 41 is made of silicone material with a trapezoidal cross section. The main sealing strip 41 is fixed in the annular mounting groove preset on the surface of the sealing part 211 by bonding or embedding. After installation, its cross section has the larger bottom facing outward. When the filter module 2 enters the filter station 14, the trapezoidal sealing strip is pressed into the sealing groove 131 of the corresponding shape on the inner wall of the inspection port 13. The interference fit of its double-sided inclined surface generates uniform radial and axial sealing force, effectively blocking the gas leakage path. On the outer periphery of the main sealing strip 41, near the edge of the inspection port 13, an auxiliary dustproof lip 42 is arranged around it. This dustproof lip is a hook-shaped elastic rubber strip, which is connected to the main sealing strip 41 substrate by co-molding or bonding. The dustproof lip faces outward from the housing and maintains light contact with the metal edge of the access port 13. Its working principle is as follows: during the closing process of the filter module 2 each time it returns from the replacement station 15 to the filter station 14, the barbed lip can first scrape off the dust and sticky particles accumulated on the edge of the access port 13 and guide them to fall to the outside.

[0034] In one possible implementation, the inner side of the sealing part 211 of the base 21 is provided with a T-shaped groove 51, and a T-shaped slider 52 adapted to the T-shaped groove 51 is provided on one side of the filter frame 22. The T-shaped slider 52 can slide along the T-shaped groove 51 to realize the loading and unloading between the filter frame 22 and the base 21.

[0035] Combination Figures 1 to 2 As shown, in this embodiment, a longitudinally extending T-shaped groove 51 is machined on the inner side of the sealing part 211 of the base 21, i.e., the side facing the interior of the filter housing 1. This groove extends through both the upper and lower ends of the sealing part 211 of the base 21, and its cross-section has a standard T-shaped structure, consisting of a wider opening and a narrower cavity. It is typically formed by extrusion or milling of an aluminum alloy base 21 to ensure dimensional accuracy and surface finish. Correspondingly, a T-shaped slider 52, precisely fitted to the T-shaped groove 51, is fixedly installed on the back side of the filter frame 22. This slider is typically injection molded from wear-resistant engineering plastic, and its shape mirrors the groove. During installation, simply tilt the filter frame 22 at a certain angle, align the head of the T-shaped slider 52 with the open slot, and then lower the filter frame 22 along the slot direction, allowing the slider neck to fall into the narrower slot cavity. Finally, apply downward pushing force, and the slider will slide smoothly down along the T-shaped groove 51 until the filter frame 22 is fully in place and flush against the base 21. Conversely, lifting the filter frame 22 upwards will complete the disassembly.

[0036] In one possible implementation, the top of the filter frame 22 is provided with an unlocking paddle 53, which is linked to the T-shaped slider 52. Moving the unlocking paddle 53 can cause the T-shaped slider 52 to retract and disengage from the limit of the T-shaped groove 51, thereby enabling the filter frame 22 to be quickly disassembled.

[0037] To facilitate quick removal of the filter frame 22 from the base 21, an unlocking lever 53 is provided on the top of the filter frame 22. This unlocking lever 53 is typically made of metal or high-strength plastic and is rotatably mounted on a pre-set mounting seat on the top of the filter frame 22 via a pivot. The inner side of the unlocking lever 53 is linked to the T-shaped slider 52 on the back of the filter frame 22 via a linkage or cam mechanism. Specifically, the T-shaped slider 52 has a laterally movable locking tongue inside, which is always kept protruding outwards by a compression spring, thus engaging with the limiting recess on the side wall of the T-shaped groove 51 of the base 21 to form a lock. When it is necessary to remove the filter frame 22, the operator presses down on the outer end of the unlocking lever 53 with their finger. The lever rotates around the pivot, and the protrusion at its inner end presses down, pushing the locking tongue of the slider inwards through the linkage mechanism, overcoming the spring force and completely disengaging it from the limiting recess. At this point, the T-shaped slider 52 is no longer restricted by the lateral direction, and the operator can then pull the filter frame 22 upwards to allow the T-shaped slider 52 to smoothly disengage from the open end of the T-shaped groove 51, thereby achieving quick and non-destructive disassembly of the filter frame 22.

[0038] In one possible implementation, the rotating shaft is a lead screw 321, and the driven member is a nut seat 322 adapted to the lead screw 321. The nut seat 322 is fixedly connected to the bottom of the filter module 2 by bolts.

[0039] The transmission assembly 33 includes a drive gear 331, two driven bevel gears 332, and two transmission shafts 333. The drive gear 331 is fixedly sleeved on the output shaft end of the drive motor 31, and the two driven bevel gears 332 are respectively fixed to the same end of the two lead screws 321. Each of the transmission shafts 333 has a transmission gear meshing with the drive gear 331 and a bevel gear meshing with the driven bevel gears 332 at both ends. The transmission shafts 333 are fixed to the bottom of the filter housing 1 through bearing seats to realize the synchronous transmission of power from the drive motor 31 to the two lead screws 321.

[0040] Combination Figure 2As shown, in this embodiment, the rotating shaft adopts a trapezoidal lead screw 321 structure with chrome plating for rust prevention, ensuring long-term stable operation in dusty exhaust gas environments. The driven component is a nut seat 322 adapted to the lead screw 321, with a waist-shaped hole at its top. It is rigidly connected to the mounting ear plate at the bottom of the filter module 2 by high-strength bolts. The bolt head is embedded in the countersunk hole of the ear plate to avoid interference with the bottom of the housing. The driving gear 331 of the transmission assembly 33 is fixed to the end of the output shaft of the drive motor 31 by a key connection; the two driven bevel gears 332 are respectively fixed to the same end of the two lead screws 321 (near the drive motor 31) by set screws. The two ends of the transmission shaft 333 are respectively fixed to the transmission gear and the driving bevel gear by flat keys. The middle part of the transmission shaft 333 is fixed to the side of the motor mounting seat at the bottom of the filter housing 1 by a bearing with a seat. An adjusting shim is provided at the bottom of the bearing seat, and the height of the transmission shaft 333 can be finely adjusted by increasing or decreasing the thickness of the shim to ensure the gear meshing clearance. During operation, the rotational motion output by the drive motor 31 is transmitted to the transmission gears of the two transmission shafts 333 via the drive gear 331, causing the transmission shafts 333 to rotate synchronously. The drive bevel gear at the other end of the transmission shaft 333 meshes with the driven bevel gear 332 at the end of the lead screw 321, converting the horizontal rotational motion into vertical transmission, driving the two lead screws 321 to rotate synchronously at the same speed and direction. When the lead screw 321 rotates, the nut seat 322 moves linearly along the axial direction of the lead screw 321, thereby driving the filter module 2 to move smoothly between the filter station 14 and the replacement station 15.

[0041] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" 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 application 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0042] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A modular replaceable dry exhaust filter, characterized in that, include: A filter housing having an air inlet, an air outlet, and several maintenance ports; A plurality of filter modules are slidably housed within the filter housing for filtering the passing airflow and can be extracted or pushed in through the inspection port. and The module pushing mechanism includes a drive motor, a linear drive assembly, and a transmission assembly. The drive motor is fixedly installed inside the filter housing. The linear drive assembly includes two rotating shafts symmetrically arranged at the bottom of the filter housing, and a driven member that cooperates with the rotating shafts and is fixedly installed at the bottom of the filter module. The driven member can move axially under the drive of the rotating shafts. The transmission assembly is connected between the output end of the drive motor and the two rotating shafts to synchronously transmit the rotational motion of the motor to the two rotating shafts, so that the filter module moves linearly between the filtration station inside the filter housing and the replacement station corresponding to the inspection port.

2. The modular replaceable dry filter according to claim 1, characterized in that, The filter module includes a base, a filter frame, and a filter layer disposed within the filter frame; the base is L-shaped, with its bottom fixedly connected to the driven member of the linear drive assembly, and its side is a sealing part, which is adapted to the side inspection port of the filter housing and forms a sealing fit.

3. The modular replaceable dry filter according to claim 2, wherein, The sealing part is provided with an annular sealing assembly on the side facing the inspection port. The annular sealing assembly includes a main sealing strip and an auxiliary dustproof lip. The main sealing strip is a silicone strip with a trapezoidal cross section, which is interference-fitted with the sealing groove on the inner wall of the inspection port. The auxiliary dustproof lip is a hook-shaped elastic rubber strip arranged along the outer periphery of the main sealing strip and is used to scrape off the dust accumulated at the edge of the inspection port.

4. The modular replaceable dry filter according to claim 2, wherein, The inner side of the base sealing part is provided with a T-shaped sliding groove, and a T-shaped slider adapted to the T-shaped sliding groove is provided on one side of the filter frame. The T-shaped slider can slide along the T-shaped sliding groove to realize the loading and unloading of the filter frame and the base.

5. The modular replaceable dry filter according to claim 4, characterized in that, The top of the filter frame is equipped with an unlocking lever, which is linked to the T-shaped slider. Moving the unlocking lever can cause the T-shaped slider to retract and disengage from the limit of the T-shaped groove, thereby enabling the filter frame to be quickly disassembled.

6. The modular replaceable dry filter according to claim 1, wherein, The rotating shaft is a lead screw, and the driven component is a nut seat adapted to the lead screw. The nut seat is fixedly connected to the bottom of the filter module by bolts. The transmission assembly includes a driving gear, two driven bevel gears, and two transmission shafts. The driving gear is fixedly sleeved on the output shaft end of the drive motor, and the two driven bevel gears are respectively fixed to the same end of the two lead screws. Each of the transmission shafts has a transmission gear meshing with the driving gear and a bevel gear meshing with the driven bevel gears at both ends. The transmission shafts are fixed to the bottom of the filter housing through bearing seats to realize the synchronous transmission of power from the drive motor to the two lead screws.

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