A self-cleaning bag filter

Abstract

The present invention discloses a self-cleaning bag filter, which relates to the technical field of bag filters. It includes a tank body and filter bags. A rotating seat is rotatably installed inside the tank body, and the rotating seat divides the interior of the tank body into a filtering chamber and a cleaning chamber. On both sides of the top of the rotating seat, cleaning rings are symmetrically installed. Sliding grooves for the movement of the cleaning rings are provided on both sides of the rotating seat. A first limiting block is fixed on the side wall of the cleaning ring away from the rotating seat. Multiple groups of nozzles are installed on the inner wall of the cleaning ring. An adjusting component is arranged inside the nozzles. At the bottom end of the inner wall of the tank body, a threaded rod is rotatably installed through a motor. A moving seat is installed on the outer wall of the threaded rod. Two limiting seats are symmetrically fixed on the side wall of the moving seat. A limiting component is arranged inside the limiting seats. By setting the rotating seat, cleaning rings, threaded rod and limiting component, the interior of the tank body is divided into an independent filtering chamber and cleaning chamber, and the switching between filtering and cleaning operations is realized through the alternating conversion of the two chambers, maintaining the continuous operation of the filtering work.

Description

Technical Field

[0001] The present invention relates to the technical field of bag filters, and specifically to a self-cleaning bag filter. Background Art

[0002] A filter is a device used to separate solid impurities, particles and other pollutants in a fluid, and is widely used in many fields such as chemical industry, food, environmental protection, etc. Its working principle is mainly to use filter media such as filter screens and filter elements to intercept and adsorb the impurities in the fluid, so as to achieve the purification of the fluid. The self-cleaning bag filter is an innovative product of the filter. It integrates automation technology on the basis of the filter, monitors the clogging state of the filter bag through a pressure sensor, automatically triggers the self-cleaning system, and uses methods such as backwashing, mechanical brushing and vibration peeling to remove the impurities on the surface of the filter bag, so that the impurities on the filter bag fall off and fall into the collection chamber. There is no need to manually disassemble and replace the filter bag frequently, which can reduce manual intervention and maintenance costs, and balance efficiency and environmental protection.

[0003] There are various self-cleaning methods for existing self-cleaning bag filters. Among them, backwashing is the most common. Its working principle is to flush the filter bag with a reverse-flowing liquid or gas. When the differential pressure sensor detects that the differential pressure inside and outside the filter bag reaches the set value, the control system will automatically start the backwashing program to strongly flush the surface of the filter bag, so that the particulate matter attached to the filter bag falls off and is discharged through the sewage discharge valve. However, to ensure the self-cleaning effect, the equipment needs to temporarily stop the liquid inlet and suspend the filtration process, resulting in the interruption of the filtration operation, which may interfere with the continuous production process.

[0004] In view of the above problems, there is an urgent need for innovative design on the original basis. Summary of the Invention

[0005] The purpose of the present invention is to provide a self-cleaning bag filter to solve the problem that the filtration work needs to be stopped during self-cleaning proposed in the above background art. The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem that the prior art solution is too single.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A self-cleaning bag filter, including a tank body and a filter bag. A rotating seat is rotatably installed inside the tank body, and the rotating seat divides the inside of the tank body into a filtration chamber and a cleaning chamber. Cleaning rings are symmetrically installed on both sides of the top of the rotating seat. Sliding grooves for the movement of the cleaning rings are opened on both sides of the rotating seat. A first limiting block is fixed on the side wall of the cleaning ring away from the rotating seat. A plurality of spray heads are installed on the inner wall of the cleaning ring, and an adjusting component is arranged inside the spray heads. A threaded rod is rotatably installed at the bottom end of the inner wall of the tank body through a motor, a moving seat is installed on the outer wall of the threaded rod, two limiting seats are symmetrically fixed on the side wall of the moving seat, and a limiting component is arranged inside the limiting seats.

[0007] The limiting component includes two sliding blocks vertically and limitably slidably mounted on the surface of the upper limiting seat, and a fixed seat fixed inside the inner cavity of the upper limiting seat. The fixed seat is composed of a bottom plate member and a top sleeve. A transmission rod is slidably mounted at the central position of the fixed seat. A second limiting block is fixed at the bottom end of the transmission rod. A guiding block is slidably mounted on the upper part of the transmission rod. There are also two third limiting blocks vertically and limitably slidably mounted inside the lower limiting seat.

[0008] Preferably, an extrusion block corresponding to the sliding block is mounted on the inner wall of the tank body.

[0009] Preferably, a sliding groove for the movement of the first limiting block is provided on the inner wall of the tank body, and the position of the first limiting block corresponds to the position of the limiting seat.

[0010] Preferably, the cross section of the guiding block is designed in a Z shape, and the two side walls of the guiding block are designed as inclined surfaces.

[0011] Preferably, the inner wall of the sliding block is designed as an inclined surface corresponding to the side wall of the guiding block, and the sliding block and the top of the fixed seat are connected by a spring.

[0012] Preferably, the side walls of the two second limiting blocks away from the central position of the limiting seat are designed as inclined surfaces, and the two side walls of the two third limiting blocks are both designed as inclined surfaces.

[0013] Preferably, the adjusting component includes multiple groups of rotating shafts rotatably mounted inside the nozzle, and multiple groups of first moving grooves opened inside the nozzle. Blades are fixed in the middle of the side walls of the rotating shafts. A driving ring is rotatably mounted inside the nozzle. Multiple groups of second moving grooves are opened on the surface of the driving ring. A driving block is rotatably mounted in the cavity of the side wall of the driving ring. There is also an adjusting ring rotatably mounted on the inner wall of the cleaning ring. An adjusting block is fixed on the side wall of the adjusting ring close to the rotating seat. An electric push rod with an extending end connected to the adjusting block is mounted inside the cleaning ring.

[0014] Preferably, both ends of the rotating shaft are respectively located on the inner walls of the first moving groove and the second moving groove, and the bottom end of the driving block is limitably slidably mounted on the inner wall of the adjusting ring.

[0015] Preferably, the adjusting block is designed with an inclined angle, and a pressure sensor is arranged at the bottom of the rotating seat. The pressure sensor drives the electric push rod to move through a controller.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In this invention, through the rotation base, sliding groove, cleaning ring, first limiting block, threaded rod and limiting component, the interior of the tank is divided into an independent filtering chamber and a cleaning chamber. The seamless switching between filtering and cleaning operations is achieved through the rotation of the two chambers in turn, maintaining the continuous operation of the filtering work, improving production continuity and efficiency. With the cooperation of the limiting component, after the rotation base rotates, the first limiting block is locked by the limiting component, ensuring the stability of cleaning. The threaded rod can drive the cleaning ring to move vertically and linearly along the sliding groove under the drive of the motor, comprehensively cleaning the filter bag.

[0018] 2. In this invention, through the cleaning ring, nozzle and adjustment component, when the impurities accumulated on the inner wall of the filter bag are relatively thick, the nozzle diameter is automatically changed and the spraying pressure is adjusted to strongly impact the thick impurities. The pressure sensor monitors the change of the filtering pressure in real time. When the pressure value exceeds the set threshold, the signal is immediately transmitted to the controller. After receiving the signal, the controller drives the electric push rod to extend, applying pressure to the adjustment block, causing the adjustment ring to rotate, and then pushing the drive block, causing the drive ring to rotate, so that multiple groups of blades rotate synchronously to adjust the nozzle diameter. When the nozzle diameter shrinks, the fluid spraying pressure increases, acting on the thick impurities on the inner wall of the filter bag with a strong impact force, completely peeling them off. It is dynamically adjusted according to the actual working conditions, improving the cleaning effect while avoiding damage to the filter bag caused by continuous strong impact and reducing the operating cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic three-dimensional structure diagram of the present invention;

[0020] Figure 2 is a schematic cross-sectional three-dimensional structure diagram of the present invention;

[0021] Figure 3 is the present invention [[ID=A]] Figure 2 is an enlarged schematic structure diagram at A in the present invention;

[0022] Figure 4 is a schematic structure diagram of the filtering chamber, cleaning chamber, filter bag and rotation base of the present invention;

[0023] Figure 5 is a schematic structure diagram of the cleaning ring of the present invention;

[0024] Figure 6 is a schematic cross-sectional structure diagram of the cleaning ring of the present invention;

[0025] Figure 7 is the present invention Figure 6 is an enlarged schematic structure diagram at B in the present invention;

[0026] Figure 8 is a schematic exploded structure diagram of the nozzle of the present invention;

[0027] Figure 9Cross-sectional view of the split structure of the nozzle of the present invention;

[0028] Figure 10 Schematic structural diagram of the moving seat of the present invention;

[0029] Figure 11 Cross-sectional structural diagram of the moving seat of the present invention;

[0030] Figure 12 For the present invention Figure 11 Schematic enlarged structural diagram at position C in the present invention.

[0031] In the figure: 1, tank body; 101, filtration chamber; 102, cleaning chamber; 103, filter bag; 104, extrusion block; 2, rotating seat; 201, sliding groove; 3, cleaning ring; 301, first limiting block; 4, nozzle; 401, first moving groove; 402, blade; 403, rotating shaft; 404, driving ring; 405, second moving groove; 406, driving block; 5, adjusting ring; 501, adjusting block; 502, electric push rod; 6, threaded rod; 601, moving seat; 602, limiting seat; 7, sliding block; 701, guiding block; 702, transmission rod; 703, fixed seat; 704, second limiting block; 705, third limiting block. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1-12, the present invention provides a technical solution: a self-cleaning bag filter, including a tank body 1 and a filter bag 103. A rotating seat 2 is rotatably installed inside the tank body 1. The rotating seat 2 divides the interior of the tank body 1 into a filtering chamber 101 and a cleaning chamber 102. On both sides of the top of the rotating seat 2, cleaning rings 3 are symmetrically installed. Sliding grooves 201 for the movement of the cleaning rings 3 are provided on both sides of the rotating seat 2. A first limiting block 301 is fixed on the side wall of the cleaning ring 3 away from the rotating seat 2. Multiple groups of nozzles 4 are installed on the inner wall of the cleaning ring 3. An adjusting component is arranged inside the nozzles 4. The bottom end of the inner wall of the tank body 1 is rotatably installed with a threaded rod 6 through a motor. A moving seat 601 is installed on the outer wall of the threaded rod 6. Two limiting seats 602 are symmetrically fixed on the side wall of the moving seat 601. A limiting component is arranged inside the limiting seats 602. The rotating seat 2 divides the tank body 1 into a filtering chamber 101 and a cleaning chamber 102, and the functions of the two chambers are switched by timed rotation, so that the cleaning of the filter bag 103 can be completed without stopping the machine, improving production continuity. The adjusting component monitors the pressure of the filter bag 103 in real time through a pressure sensor. When the pressure exceeds the threshold value due to the accumulation of impurities, the controller drives the electric push rod 502 to adjust the diameter of the nozzle 4, enhancing the spraying pressure to peel off thick-layer impurities, dynamically adjusting the cleaning intensity according to the working conditions, and avoiding damaging the filter bag 103 due to excessive impact.

[0034] The limiting component includes two sliding blocks 7 vertically and limitably slidably installed on the surface of the upper limiting seat 602, and a fixed seat 703 fixed in the inner cavity of the upper limiting seat 602. The fixed seat 703 is composed of a bottom plate member and a top sleeve. A transmission rod 702 is slidably installed at the central position of the fixed seat 703. A second limiting block 704 is fixed at the bottom end of the transmission rod 702. A guide block 701 is slidably installed on the upper part of the transmission rod 702. It also includes two third limiting blocks 705 vertically and limitably slidably installed inside the lower limiting seat 602. The second limiting block 704 and the third limiting block 705 lock the first limiting block 301 to ensure the stability of the work.

[0035] As an implementation manner of the present invention, an extrusion block 104 corresponding to the sliding block 7 is installed on the inner wall of the tank body 1. When the rotating seat 2 rotates to switch the chamber function, the cleaning ring 3 drives the first limiting block 301 to move. At this time, the sliding block 7 is in the initial state. When the first limiting block 301 follows the moving seat 601 and descends, the sliding block 7 loses the restriction of the extrusion block 104 and extends out of the limiting seat 602. With the cooperation of the spring and the guide block 701, the second limiting block 704 extends out of the limiting seat 602 to lock the first limiting block 301, ensuring the stability of the position of the cleaning ring 3 during the cleaning operation.

[0036] As an embodiment of the present invention, a sliding groove is provided on the inner wall of the tank body 1 for the movement of the first limit block 301. The position of the first limit block 301 corresponds to the position of the limit seat 602. When the rotating seat 2 drives the cleaning ring 3 to rotate, the first limit block 301 moves smoothly along the sliding groove. The guiding effect of the sliding groove effectively constrains the movement trajectory of the cleaning ring 3, avoiding its deviation or shaking during the rotation process, and ensuring that the cleaning ring 3 can accurately reach the preset cleaning position. The position of the first limit block 301 is designed to correspond to the position of the limit seat 602, so that after the cleaning ring 3 is in place, the first limit block 301 can be accurately embedded in the gap of the limit seat 602, providing basic conditions for locking the subsequent limit assembly.

[0037] As an embodiment of the present invention, the guide block 701 has a Z-shaped cross-section, and the two side walls of the guide block 701 are inclined. The guide block 701 with a Z-shaped cross-section can realize the direction conversion of force, so that the sliding block 7 and the second limit block 704 can move toward each other.

[0038] As an embodiment of the present invention, the inner wall of the sliding block 7 is designed with a slope corresponding to the side wall of the guide block 701. The sliding block 7 is connected to the top of the fixed seat 703 by a spring. When the sliding block 7 moves away from the extrusion block 104, the spring is released to push the sliding block 7 inward, and the guide block 701 is driven to move laterally through the slope, so that the second limit block 704 is extended to complete the locking. When the sliding block 7 contacts the extrusion block 104, the external force overcomes the spring force to move the sliding block 7 outward, driving the guide block 701 to move in the opposite direction, and releasing the locked state.

[0039] As an embodiment of the present invention, the side walls of the two second limit blocks 704 away from the center position of the limit seat 602 are designed with a slope, and the side walls of the two third limit blocks 705 are both designed with a slope. When the cleaning ring 3 is in place, the first limit block 301 gradually enters the gap between the two third limit blocks 705 along the slope of the third limit block 705, forming a fixed state. When the movable seat 601 moves downward, the sliding block 7 moves away from the extrusion block 104, and the sliding block 7 and the second limit block 704 extend out of the limit seat 602 synchronously. The second limit block 704 locks the first limit block 301. When it is necessary to switch the chamber, the first limit block 301 can exit along the slope of the third limit block 705 to avoid unlocking difficulties due to component jamming, making the switching process of the rotating seat 2 more flexible and smooth.

[0040] As an embodiment of the present invention, the adjustment component includes multiple groups of rotating shafts 403 rotatably installed inside the nozzle 4, and multiple groups of first movable grooves 401 opened inside the nozzle 4, a blade 402 is fixed in the middle of the side wall of the rotating shaft 403, a driving ring 404 is rotatably installed inside the nozzle 4, multiple groups of second movable grooves 405 are opened on the surface of the driving ring 404, a driving block 406 is rotatably installed in the cavity of the side wall of the driving ring 404, and also includes an adjustment ring 5 rotatably installed on the inner wall of the cleaning ring 3, an adjustment block 501 is fixed to the side wall of the adjusting ring 5 close to the rotating seat 2, and an electric push rod 502 with an extended end connected to the adjustment block 501 is installed inside the cleaning ring 3.

[0041] As an embodiment of the present invention, the two ends of the rotating shaft 403 are respectively located on the inner walls of the first movable groove 401 and the second movable groove 405, and the bottom end of the driving block 406 is limited and slidably installed on the inner wall of the adjusting ring 5. The rotating shaft 403, the movable groove and the driving block 406 cooperate to form an efficient and stable transmission chain of the adjusting component. The bottom end of the driving block 406 is limited and slidably installed on the inner wall of the adjusting ring 5. When the electric push rod 502 drives the adjusting ring 5 to rotate, the adjusting ring 5 will push the driving block 406 to move, and then drive the driving ring 404 to rotate synchronously. When the driving ring 404 rotates, the second movable groove 405 accurately drives the blade 402 to rotate around its own axis through the thrust on the rotating shaft 403, thereby realizing precise scaling of the caliber of the nozzle 4, so that the fluid injection pressure is adapted to impurities of different thicknesses, which not only ensures the cleaning effect, but also avoids excessive scouring and damage to the filter bag 103.

[0042] As an embodiment of the present invention, the adjustment block 501 is designed at an angle, and a pressure sensor is provided at the bottom of the rotating seat 2. The pressure sensor drives the electric push rod 502 to move through the controller. When the extended end of the electric push rod 502 pushes the adjustment block 501, the adjustment ring 5 can rotate synchronously through the guidance of the angle.

[0043] Working principle: After using the self-cleaning bag filter for a period of time, the rotating seat 2 starts to rotate, switching the filter bags 103 inside the filter chamber 101 and the cleaning chamber 102, enabling the device to continuously perform filtering operations. As the rotating seat 2 rotates, the first limit block 301 installed on the side wall of the cleaning ring 3 moves smoothly along the chute, gradually approaching the moving seat 601, contacting and squeezing the third limit block 705. The inclined surface on the side wall of the third limit block 705 is squeezed and temporarily retracts into the limit seat 602. When the first limit block 301 smoothly enters the gap between the two limit seats 602, the third limit block 705 extends out of the limit seat 602 again under the push of the spring. Subsequently, the motor starts, the threaded rod 6 rotates, driving the moving seat 601 and the limit seat 602 to move downward synchronously. As the sliding block 7 moves away from the extrusion block 104, after losing the extrusion of the extrusion block 104, the sliding block 7 extends out towards the outer wall of the limit seat 602 under the elastic force of the spring. The inclined surface on the inner wall of the sliding block 7 contacts and squeezes the guiding block 701, and the guiding block 701 moves horizontally, driving the second limit block 704 to extend downward out of the outer wall of the limit seat 602, precisely locking the third limit block 705, ensuring the stability of each component during the cleaning process;

[0044] Since the rotating seat 2 rotates at a fixed time, the thickness of the impurities accumulated on the surface of the filter bag 103 is inconsistent. The pressure sensor continuously monitors the pressure change during the filtration of the filter bag 103. When the impurities accumulated on the surface of the filter bag 103 are thick, resulting in the pressure value exceeding the set threshold, the pressure sensor immediately transmits the signal to the controller. After receiving the signal, the controller drives the electric push rod 502 to extend. The extending end of the electric push rod 502 presses against the adjusting block 501. The adjusting block 501 is designed with an inclined angle. When the adjusting block 501 is pushed, the adjusting ring 5 rotates synchronously. The bottom end of the driving block 406 is limited and slides on the inner wall of the adjusting ring 5. When the adjusting ring 5 rotates, it pushes the driving block 406. The driving block 406 pushes the driving ring 404 to rotate. The second moving groove 405 squeezes the rotating shaft 403. The rotating shaft 403, in cooperation with the first moving groove 401, drives the blade 402 to move, adjusting the diameter of the nozzle 4. When the diameter of the nozzle 4 shrinks, the fluid jet pressure increases. The strong impact force acts on the thick layer of impurities accumulated on the surface of the filter bag 103, completely peeling them off. The cleaning intensity is adjusted adaptively according to the actual working conditions, improving the cleaning effect, avoiding damage to the filter bag 103 caused by continuous strong impact, and extending the service life of the filter bag 103.

[0045] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. In the description of the present invention, unless otherwise specified, the meaning of "plural" is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A self-cleaning bag filter, comprising a tank body (1) and a filter bag (103), characterized in that: A rotating seat (2) is rotatably mounted inside the tank body (1), and the rotating seat (2) divides the inside of the tank body (1) into a filter chamber (101) and a cleaning chamber (102). Cleaning rings (3) are symmetrically mounted on both sides of the top of the rotating seat (2). Sliding grooves (201) for the cleaning rings (3) to move are provided on both sides of the rotating seat (2). A first limiting block (301) is fixed to the side wall of the cleaning ring (3) away from the rotating seat (2). The inner wall of the cleaning ring (3) is equipped with a plurality of spray nozzles. The nozzle (4) is provided with an adjustment component inside. The bottom end of the inner wall of the tank body (1) is provided with a threaded rod (6) which is rotated by a motor. The outer wall of the threaded rod (6) is provided with a movable seat (601). Two limit seats (602) are symmetrically fixed to the side wall of the movable seat (601). A limit assembly is provided inside the limit seat (602). The adjustment component includes a plurality of rotating shafts (403) which are rotatably installed inside the nozzle (4), and a plurality of first sets ... A movable groove (401), a blade (402) is fixed in the middle of the side wall of the rotating shaft (403), a driving ring (404) is rotatably installed inside the nozzle (4), a plurality of groups of second movable grooves (405) are provided on the surface of the driving ring (404), a driving block (406) is rotatably installed at the cavity of the side wall of the driving ring (404), and an adjusting ring (5) is rotatably installed on the inner wall of the cleaning ring (3), and an adjusting block (501) is fixed on the side wall of the adjusting ring (5) close to the rotating seat (2). ), an electric push rod (502) whose protruding end is connected to the adjustment block (501) is installed inside the cleaning ring (3), the two ends of the rotating shaft (403) are respectively located on the inner walls of the first moving groove (401) and the second moving groove (405), the bottom end of the driving block (406) is limitedly slidably installed on the inner wall of the adjustment ring (5), the adjustment block (501) is designed to be oblique, and a pressure sensor is provided at the bottom of the rotating seat (2), and the pressure sensor drives the electric push rod (502) to move through the controller; The limit assembly includes two sliding blocks (7) vertically limit-slidingly mounted on the surface of the upper limit seat (602), and a fixed seat (703) fixed in the internal cavity of the upper limit seat (602), wherein the fixed seat (703) is composed of a bottom plate and a top sleeve, a transmission rod (702) is slidably mounted at the center position of the fixed seat (703), a second limit block (704) is fixed at the bottom end of the transmission rod (702), a guide block (701) is slidably mounted on the upper part of the transmission rod (702), and further includes two third limit blocks (705) vertically limit-slidingly mounted inside the lower limit seat (602).

2. A self-cleaning bag filter according to claim 1, characterized in that: An extrusion block (104) corresponding to the sliding block (7) is installed on the inner wall of the tank body (1).

3. A self-cleaning bag filter according to claim 2, characterized in that: The inner wall of the tank body (1) is provided with a sliding groove for the first limiting block (301) to move, and the position of the first limiting block (301) corresponds to the position of the limiting seat (602).

4. A self-cleaning bag filter according to claim 3, characterized in that: The cross section of the guide block (701) is designed to be Z-shaped, and the two side walls of the guide block (701) are designed to be inclined.

5. The self-cleaning bag filter according to claim 4, characterized in that: The inner wall of the sliding block (7) is designed to be an inclined surface corresponding to the side wall of the guide block (701), and the sliding block (7) is connected to the top of the fixed seat (703) via a spring.

6. The self-cleaning bag filter according to claim 5, characterized in that: The side walls of the two second limiting blocks (704) away from the center of the limiting seat (602) are designed to be inclined, and the side walls of the two third limiting blocks (705) are both designed to be inclined.

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