Self-cleaning back-blowing cleaning and filtering equipment

Abstract

The invention relates to the technical field of air filtration, in particular to self-cleaning back-blowing cleaning and filtering equipment which comprises a shell used for filtering air, one side of the shell is communicated with an air inlet pipe, the other side of the shell is communicated with a back-blowing pipe, the shell is provided with an inner cavity, and the back-blowing pipe is communicated with the inner cavity. A first filter screen is fixedly connected to an inner cavity of the side, communicated with the air inlet pipe, of the shell, and a second filter screen is fixedly connected to the position, located on the outer side of the first filter screen, of the inner cavity of the shell. The scraper moves to scrape the inner side of the second filter screen, the first filter screen is compressed to enable firm dust and impurities on the first filter screen to fall off, the scraper scrapes the inner side of the second filter screen to clean the dust and the impurities on the inner side of the second filter screen, and cleaning of the first filter screen and the second filter screen can be enhanced while cleaning is conducted through reverse airflow. Reverse airflow can play the maximum effect, stubborn dust and impurities can be cleared away more conveniently, and the clearing effect is better.

Description

Technical Field

[0001] The invention relates to the technical field of air filtration, in particular to a self-cleaning back-blowing cleaning filter device. Background Art

[0002] Self-cleaning backwash cleaning filtration is an air filtration technology that uses reverse airflow to blow off dust on the filter element through timing or constant pressure difference to keep the filter element clean, thereby achieving continuous air filtration. Therefore, this technology is widely used in compressed air stations in various industries, blast furnace blowers, raw air machines in oxygen production stations, gas turbines, diesel engines, air conditioning and air supply systems in chemical fiber spinning industries, and centralized air conditioning systems with high requirements for air dust content.

[0003] Although the self-cleaning back-blowing cleaning filter equipment is easy to use, there are still some problems. For example, the existing self-cleaning back-blowing cleaning filter equipment blows off the dust on the filter element through reverse airflow. This cleaning method can only blow off some loosely attached dust. During the use of the filter equipment, a large amount of air must be filtered. The air contains a large amount of dust and impurities. Some dust and impurities have strong adsorption properties. The dust and impurities on the filter element cannot be completely blown off by blowing alone. The cleaning effect is not strong. It will be more difficult to clean in the long run, and the filter element will also be damaged. Summary of the invention

[0004] The purpose of the present invention is to provide a self-cleaning back-blowing cleaning filter device, which drives the top cylinder to act on the first filter screen and the second filter screen in stages through the lateral movement of the power sail, so as to solve the problem that the dust and impurities on the filter element cannot be completely blown off by blowing only, the cleaning effect is not strong, it will be more difficult to clean in the long run, and it will also cause damage to the filter element.

[0005] To achieve the above-mentioned purpose, a self-cleaning back-blowing cleaning filter device is provided, comprising a shell for filtering air, one side of the shell is connected to an air inlet pipe, the other side of the shell is connected to a back-blowing pipe, the shell is provided with an inner cavity, a first filter is fixedly connected to the inner cavity on the side of the shell connected to the air inlet pipe, and a second filter is fixedly connected to the inner cavity of the shell and located outside the first filter; Also includes: A top cylinder, wherein the top cylinder is located in the inner cavity of the shell, one end of the top cylinder passes through the second filter screen and extends to the inner cavity of the second filter screen, one end of the top cylinder extending to the inner cavity of the second filter screen is connected with one end of the first filter screen, and the top cylinder can move laterally in the inner cavity of the shell, and is used to clean the first filter screen and the second filter screen during backwash cleaning, and a dividing groove is provided in the middle position of the surface of the top cylinder.

[0006] As a further improvement of the technical solution, a first ring is movably connected to the surface of the top cylinder near one end of the backblowing tube, and mounting frames are fixedly connected on both sides of the first ring, and a power sail for driving the top cylinder is fixedly connected to the mounting frame.

[0007] As a further improvement of the present technical solution, a first sliding rod is fixedly connected to both sides of the mounting frame, a first sliding groove is provided on the inner wall of the shell and opposite to the first sliding rod, and one end of the first sliding rod is slidably connected to the inner cavity of the first sliding groove.

[0008] As a further improvement of the present technical solution, a second ring is connected to the surface of the top cylinder located at one end of the inner cavity of the second filter screen, a fixed rod is fixedly connected to the surface of the second ring, the fixed rod is provided with an inner cavity, a first spring is fixedly connected to the bottom of the inner cavity of the fixed rod, a movable rod is fixedly connected to the top of the first spring, the top of the movable rod passes through the fixed rod and extends to the outside of the fixed rod, a scraper is fixedly connected to the top of the movable rod, the top of the scraper is in contact with the inner side of the second filter screen, and a total of several groups of scrapers are provided, and the several groups of scrapers form a circle.

[0009] As a further improvement of the technical solution, a vertical plate is fixedly connected to the surface of the second filter screen, a plug rod is fixedly connected to one side of the vertical plate, and a socket matching the plug rod is provided on the side of the first ring facing the plug rod, and the shape of the socket is T-shaped.

[0010] As a further improvement of the present technical solution, a hollow groove is provided at one end of the top tube directly below the first ring, and the hollow groove is connected to the socket. A second spring is fixedly connected to the bottom of the inner cavity of the hollow groove, and a fixing pin is fixedly connected to the top of the second spring. The fixing pin of the second spring is inserted into the inner cavity of the socket in a normal state.

[0011] As a further improvement of the technical solution, a horizontal plate is fixedly connected to the inner wall of the shell and located above the first filter screen, a telescopic rod is fixedly connected to the top of the horizontal plate, a fixed plate is fixedly connected to the top of the telescopic rod, and a round rod is fixedly connected to one side of the fixed plate.

[0012] As a further improvement of the present technical solution, a docking plate is provided on the surface of the second circular ring, the bottom end of the docking plate passes through the second circular ring and the top tube in sequence and extends to the inner cavity of the top tube, and a circular hole matching the round rod is opened on the surface of the docking plate.

[0013] As a further improvement of the present technical solution, the top and bottom of the second filter are fixedly connected with a second slide rod, the top and bottom of the inner cavity of the shell are provided with a second slide groove, and one end of the second slide rod is slidably connected to the inner cavity of the second slide groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the self-cleaning back-blowing cleaning filter device, when the reverse airflow is used to blow off the dust and impurities on the filter element, the reverse airflow enters the shell through the back-blowing pipe to blow the power sail to move, and the movement of the power sail drives the top cylinder to move. The movement of the top cylinder compresses the first filter screen, and at the same time, the top cylinder drives the scraper to move. The movement of the scraper scrapes the inner side of the second filter screen. The first filter screen is compressed to make the firm dust and impurities thereon fall off, and the scraper scrapes the inner side of the second filter screen to clean the dust and impurities inside. The reverse airflow can be used to clean the first filter screen and the second filter screen at the same time, so that the reverse airflow can play the greatest effect, and it is more convenient to remove stubborn dust and impurities, and the cleaning effect is better.

[0015] 2. In this self-cleaning back-blowing cleaning filter device, when the power sail moves to drive the top cylinder to push into the first filter, the first filter is flipped over so that the inner side of the first filter is exposed to the outside. This flipping will thoroughly clean the first filter, and the compression and flipping will clean the dust and impurities on the first filter more thoroughly, making the next air filtration more efficient. At the same time, when the top cylinder drives the first filter to flip, it will also compress the second filter. At this time, the dust and impurities on the outside of the second filter will also fall off under the action of force, and the second filter will also be deeply cleaned. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of the housing of the present invention; Figure 3 It is a structural schematic diagram of the top tube of the present invention; Figure 4 It is a schematic diagram of the structure of the power sail of the present invention; Figure 5 It is a front view of the power sail of the present invention; Figure 6 It is a schematic diagram of the structure of the dividing groove of the present invention; Figure 7 It is a structural schematic diagram of the scraper of the present invention; Figure 8 is a schematic structural diagram of the second filter screen of the present invention; Fig. 9 It is a front view of the scraper of the present invention; Fig.10 is a cross-sectional view of a fixing rod of the present invention; Fig.11 It is a structural schematic diagram of the plug rod of the present invention; Fig.12 is a cross-sectional view of the first ring of the present invention; Fig.13 It is a structural schematic diagram of a round rod of the present invention; Fig.14 It is the structural schematic diagram of the butt joint plate of the present invention.

[0017] The meaning of each number in the figure is: 1. Shell; 2. Air inlet pipe; 3. Backflush pipe; 4. First filter; 5. Second filter; 6. Top tube; 7. First ring; 8. Mounting frame; 9. Power sail; 10. First slide bar; 11. First slide slot; 12. Second ring; 13. Fixed rod; 14. Movable rod; 15. Scraper; 16. First spring; 17. Second slide bar; 18. Second slide slot; 19. Vertical plate; 20. Insert rod; 21. Insert hole; 22. Empty slot; 23. Second spring; 24. Fixed pin; 25. Horizontal plate; 26. Telescopic rod; 27. Fixed plate; 28. Round rod; 29. ​​Docking plate; 30. Round hole; 31. Dividing slot. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 14 As shown, the purpose of this embodiment is to provide a self-cleaning back-blowing cleaning and filtering device, including a shell 1 for filtering air, one side of the shell 1 is connected to an air inlet pipe 2, the other side of the shell 1 is connected to a back-blowing pipe 3, the shell 1 is provided with an inner cavity, the inner cavity on the side of the shell 1 connected to the air inlet pipe 2 is fixedly connected to a first filter screen 4, and the inner cavity of the shell 1 and the outer side of the first filter screen 4 is fixedly connected to a second filter screen 5.

[0020] Also includes: A top cylinder 6, which is located in the inner cavity of the shell 1, one end of the top cylinder 6 passes through the second filter screen 5 and extends to its inner cavity, one end of the top cylinder 6 extending to the inner cavity of the second filter screen 5 is connected with one end of the first filter screen 4, and the top cylinder 6 can make horizontal movement in the inner cavity of the shell 1, which is used to clean the first filter screen 4 and the second filter screen 5 during backwash cleaning. A dividing groove 31 is provided in the middle position of the surface of the top cylinder 6, and a first circular ring 7 is movably connected to the surface of the top cylinder 6 near one end of the backwash pipe 3, and a mounting frame 8 is fixedly connected on both sides of the first circular ring 7, and a power sail 9 for driving the top cylinder 6 is fixedly connected to the mounting frame 8, and a first slide bar 10 is fixedly connected on both sides of the mounting frame 8, and a first slide groove 11 is provided on the inner wall of the shell 1 and opposite to the first slide bar 10, and one end of the first slide bar 10 is slidably connected to the inner cavity of the first slide groove 11.

[0021] The surface of the top cylinder 6 at one end of the inner cavity of the second filter screen 5 is connected with a second ring 12, and the second ring 12 is fixed to the top of the top cylinder 6 by a docking plate 29. The surface of the second ring 12 is fixedly connected with a fixing rod 13, and the fixing rod 13 is provided with an inner cavity. The bottom of the inner cavity of the fixing rod 13 is fixedly connected with a first spring 16, and the top of the first spring 16 is fixedly connected with a movable rod 14. The top of the movable rod 14 penetrates the fixing rod 13 and extends to the outside of the fixing rod 13. The top of the movable rod 14 is fixedly connected with a scraper 15, and the top of the scraper 15 contacts the inner side of the second filter screen 5. There are several groups of scrapers 15, and several groups of scrapers 15 form a circular structure with multiple gaps. Such an arrangement can scrape the inner side of the second filter screen 5 with the maximum area.

[0022] When the reverse airflow is used to blow off the dust and impurities on the filter element, the reverse airflow enters the shell 1 through the backblowing pipe 3 to blow the power sail 9 to move, and the movement of the power sail 9 drives the top cylinder 6 to move, and the top cylinder 6 moves to compress the first filter screen 4. At the same time, the top cylinder 6 drives the scraper 15 to move, and the scraper 15 moves to scrape the inner side of the second filter screen 5. The compression of the first filter screen 4 will cause the first filter screen 4 to deform, and this deformation will produce an extrusion force on the filter holes on the first filter screen 4. This extrusion force causes the firm dust and impurities on the filter holes of the first filter screen 4 to fall off, and the scraper 15 scrapes the inner side of the second filter screen 5 to clean the dust and impurities inside it. While cleaning through the reverse airflow, the cleaning of the first filter screen 4 and the second filter screen 5 is strengthened, so that the reverse airflow can play the greatest effect, and it is more convenient to remove stubborn dust and impurities, and the cleaning effect is better.

[0023] The area where the air introduced by the backblowing pipe 3 contacts the front of the power sail 9 is sufficient to provide power to the power sail 9. Secondly, by changing the angle of the connection between the backblowing pipe 3 and the shell 1 or the shape of the backblowing pipe 3, the wind force can act more on the power sail 9 to provide stronger wind force.

[0024] The scraper 15 is provided with a brush on its surface, which can extend into the filter holes of the second filter screen 5, thereby achieving a better cleaning effect. Meanwhile, a first spring 16 is provided between the fixed rod 13 and the movable rod 14. Under the elastic force of the first spring 16, the brush of the scraper 15 is attached to the inner side of the second filter screen 5, thereby improving the cleaning effect.

[0025] A vertical plate 19 is fixedly connected to the surface of the second filter screen 5, and a plug rod 20 is fixedly connected to one side of the vertical plate 19. A socket 21 adapted to the plug rod 20 is provided on the side of the first ring 7 facing the plug rod 20, and the shape of the socket 21 is T-shaped. An empty groove 22 is provided at one end of the top tube 6 located directly below the first ring 7, and the empty groove 22 is communicated with the socket 21. A second spring 23 is fixedly connected to the bottom of the inner cavity of the empty groove 22, and a fixing pin 24 is fixedly connected to the top of the second spring 23. Under normal conditions, the fixing pin 24 of the second spring 23 is inserted into the inner cavity of the socket 21.

[0026] Under normal conditions, the fixing pin 24 is inserted into the socket 21 with the inner cavity of the first circular ring 7 and fits with the T-shaped top of the socket 21. At this time, the upper part of the fixing pin 24 is located in the socket 21 of the inner cavity of the first circular ring 7, and the lower part is located in the empty groove 22 of the inner cavity of the top tube 6, so that the first circular ring 7 and the top tube 6 are fixed together.

[0027] When the power sail 9 moves to the position in contact with the second filter screen 5, the top cylinder 6 has driven the first filter screen 4 to flip over, so that the inner side of the first filter screen 4 is exposed to the outside. At this time, the top cylinder 6 will not move under the obstruction of the first filter screen 4. At the same time, when the power sail 9 moves to the position in contact with the second filter screen 5, the insertion rod 20 is inserted into the inner cavity of the insertion hole 21 on the first ring 7. At this time, the insertion rod 20 contacts the fixing pin 24. Because the contact surface between the insertion rod 20 and the fixing pin 24 is inclined, the insertion rod 20 squeezes the fixing pin 24 so that the fixing pin 24 is pressed back into the empty groove 22 of the top cylinder 6. At this time, the first ring 7 and the top cylinder 6 are not restricted, and the power sail 9 can continue to move on the top cylinder 6. The power sail 9 moves in the first slide groove 11 through the first slide bar 10 so that it can be kept from falling. The power sail 9 continues to move to compress the second filter screen 5. During the compression process, dust and impurities fall off, so that its exterior is cleaned.

[0028] The inner wall of the housing 1 is fixedly connected with a horizontal plate 25 located above the first filter screen 4, the top of the horizontal plate 25 is fixedly connected with a telescopic rod 26, the top of the telescopic rod 26 is fixedly connected with a fixed plate 27, one side of the fixed plate 27 is fixedly connected with a round rod 28, and the surface of the second ring 12 is provided with a docking plate 29, the bottom end of the docking plate 29 sequentially penetrates the second ring 12 and the top cylinder 6, and extends to the inner cavity of the top cylinder 6, and the surface of the docking plate 29 is provided with a round hole that matches the round rod 28. Hole 30, the top and bottom of the second filter screen 5 are fixedly connected with the second slide rod 17, the top and bottom of the inner cavity of the shell 1 are provided with a second slide groove 18, one end of the second slide rod 17 is slidably connected with the inner cavity of the second slide groove 18, a through limiting hole is provided on the second ring 12, and a limiting hole is also provided at the corresponding position of the top tube 6, the limiting hole of the second ring 12 is connected with the limiting hole of the top tube 6, and the docking plate 29 is inserted into the two limiting holes in sequence to fix the second ring 12 on the top tube 6.

[0029] The second slide bar 17 and the second slide groove 18 on the second filter screen 5 mainly play the role of supporting the second filter screen 5. At the same time, the contact surface of the second slide bar 17 and the second slide groove 18 is relatively rough. When the scraper 15 is scraping, it will not affect the position of the second filter screen 5, nor will it drive the second filter screen 5 to move. Only when the power sail 9 is under the pressure of the backblowing gas, the second filter screen 5 will be compressed.

[0030] When the scraper 15 moves to the innermost side of the second filter screen 5, it is affected by the inner wall of the shell 1 and stops moving. At this time, the round rod 28 is inserted into the round hole 30 on the docking plate 29, and the scraper 15 plays a fixing role through the docking plate 29 to connect the second ring 12 and the top cylinder 6 together. When the scraper 15 stops moving, the top cylinder 6 will also stop moving and cannot continue to go deep into the first filter screen 4 for cleaning. At this time, the telescopic rod 26 is lifted to drive the round rod 28 to lift, and the round rod 28 is lifted to drive the docking plate 29 to lift, and the docking plate 29 leaves the top cylinder 6, so that the top cylinder 6 is not bound and can continue to move under the drive of the power sail 9. Its reset is to blow the second filter screen 5 and the first filter screen 4 back to their original position by introducing gas into the air inlet pipe 2. When the first filter screen 4 is reset, the docking plate 29 is located on the limiting hole of the second ring 12. At this time, the telescopic rod 26 drives the docking plate 29 to be reinserted into the limiting holes of the second ring 12 and the top cylinder 6.

[0031] When the power sail 9 moves and drives the top cylinder 6 to completely push into the first filter 4, the first filter 4 is flipped over so that the inner side of the first filter 4 is exposed to the outside. This flipping will thoroughly clean the first filter 4. The compression and flipping will clean the dust and impurities on the first filter 4 more thoroughly, making the next air filtration more efficient. At the same time, when the top cylinder 6 drives the first filter 4 to flip, it will also compress the second filter 5. At this time, the dust and impurities on the outside of the second filter 5 will also fall off under the action of force, and the second filter 5 will also be deeply cleaned.

[0032] Working principle: When self-cleaning backwash cleaning is required, compressed air is first generated by an air compressor, and then the compressed air is passed to the inner cavity of the shell 1 through the backwash pipe 3. At this time, the compressed air blows the power sail 9 to move, and the movement of the power sail 9 drives the top cylinder 6 to move. There will be three stages in the movement process of the top cylinder 6. Through the three stages and the compressed air, the first filter 4 and the second filter 5 are deeply cleaned.

[0033] The first stage: the power sail 9 moves, driving the top cylinder 6 to move, the top cylinder 6 moves to compress the first filter 4, and at the same time drives the scraper 15 to move, scraping off the dust inside the second filter 5, specifically: The movement of the power sail 9 drives the top cylinder 6 to move, and the movement of the top cylinder 6 compresses the first filter 4. At the same time, the top cylinder 6 drives the scraper 15 to move, and the scraper 15 moves to scrape the inner side of the second filter 5. The first filter 4 is compressed to make the firm dust and impurities thereon fall off, and the scraper 15 scrapes the inner side of the second filter 5 to clean the dust and impurities inside. At this time, with the dividing groove 31 as the dividing line, the left side of the top cylinder 6 enters the second filter 5 completely, and the first filter 4 is in a compressed state.

[0034] In the second stage, the scraper 15 stops when it moves to the innermost side of the second filter screen 5, and the round rod 28 is inserted into the round hole 30 on the docking plate 29 to fix the second ring 12 and the top cylinder 6; Specifically: When the scraper 15 moves to the innermost side of the second filter screen 5, it is affected by the inner wall of the shell 1 and stops moving. At this time, the round rod 28 is inserted into the round hole 30 on the docking plate 29. The scraper 15 plays a fixing role through the docking plate 29 to connect the second ring 12 and the top cylinder 6 together. When the scraper 15 stops moving, the top cylinder 6 will also stop moving and cannot continue to go deep into the first filter screen 4 for cleaning. At this time, the telescopic rod 26 is raised to drive the round rod 28 to rise, and the round rod 28 is raised to drive the docking plate 29 to rise, and the docking plate 29 leaves the top cylinder 6, so that the top cylinder 6 is not restrained and can continue to move under the drive of the power sail 9. At this time, the second filter screen 5 can be compressed, and the first filter screen 4 continues to be pushed out by the top cylinder 6. At this time, with the dividing groove 31 as the dividing line, the left side of the top cylinder 6 enters the second filter screen 5 in its entirety, and the right side partially enters.

[0035] In the third stage, the power sail 9 continues to move, compressing the second filter 5 so that the dust on the outside falls off. Specifically: When the power sail 9 moves to the position in contact with the second filter screen 5, the top cylinder 6 has driven the first filter screen 4 to flip, so that the inner side of the first filter screen 4 is exposed to the outside. At this time, the top cylinder 6 will not move under the obstruction of the first filter screen 4. At the same time, when the power sail 9 moves to the position in contact with the second filter screen 5, the insertion rod 20 is inserted into the inner cavity of the insertion hole 21 on the first ring 7. At this time, the insertion rod 20 contacts the fixing pin 24. Because the contact surface between the insertion rod 20 and the fixing pin 24 is inclined, the insertion rod 20 squeezes the fixing pin 24, so that the fixing pin 24 is pressed back into the empty slot 2 of the top cylinder 6. 2, at this time the first ring 7 and the top cylinder 6 are not restricted, at this time the first ring 7 can drive the power sail 9 to continue to move, and the power sail 9 moves in the first slide groove 11 through the first slide bar 10 so that it can be kept from falling, the power sail 9 continues to move to compress the second filter 5, at this time with the dividing groove 31 as the dividing line, the left side of the top cylinder 6 with the first filter 4 is located on the outside of the shell 1, the right side of the top cylinder 6 is located on the inside of the outside of the shell 1, and the power sail 9 is close to the inside of the shell 1, at this stage the first filter 4 is completely turned over, the inside is exposed to the outside, and the second filter 5 is completely compressed.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A self-cleaning backwashing filter device, comprising a housing (1) for filtering air, characterized in that: One side of the shell (1) is connected to an air inlet pipe (2), and the other side of the shell (1) is connected to a back-blowing pipe (3); the shell (1) is provided with an inner cavity, and a first filter screen (4) is fixedly connected to the inner cavity of the shell (1) on the side connected to the air inlet pipe (2); a second filter screen (5) is fixedly connected to the inner cavity of the shell (1) and located outside the first filter screen (4); Also includes: A top cylinder (6), the top cylinder (6) being located in the inner cavity of the shell (1), one end of the top cylinder (6) passing through the second filter screen (5) and extending to the inner cavity of the second filter screen (5), the top cylinder (6) extending to one end of the inner cavity of the second filter screen (5) and communicating with one end of the first filter screen (4), the top cylinder (6) being capable of transverse movement in the inner cavity of the shell (1) and being used for cleaning the first filter screen (4) and the second filter screen (5) during backwash cleaning, a dividing groove (31) being provided in the middle of the surface of the top cylinder (6).

2. The self-cleaning backwashing filter equipment according to claim 1 is characterized in that: A first circular ring (7) is connected to a surface of the top cylinder (6) close to one end of the backblowing pipe (3), and mounting frames (8) are fixedly connected to both sides of the first circular ring (7), and a power sail (9) for driving the top cylinder (6) is fixedly connected to the mounting frame (8).

3. The self-cleaning backwashing filter equipment according to claim 2 is characterized in that: First sliding rods (10) are fixedly connected to both sides of the mounting frame (8), and a first sliding groove (11) is provided on the inner wall of the housing (1) at a position directly opposite to the first sliding rod (10), and one end of the first sliding rod (10) is slidably connected to the inner cavity of the first sliding groove (11).

4. The self-cleaning backwashing filter equipment according to claim 3 is characterized in that: The surface of the top cylinder (6) located at one end of the inner cavity of the second filter screen (5) is movably connected to a second ring (12); the surface of the second ring (12) is fixedly connected to a fixing rod (13); the fixing rod (13) is provided with an inner cavity; the bottom of the inner cavity of the fixing rod (13) is fixedly connected to a first spring (16); the top of the first spring (16) is fixedly connected to a movable rod (14); the top of the movable rod (14) passes through the fixing rod (13) and extends to the outside of the fixing rod (13); the top of the movable rod (14) is fixedly connected to a scraper (15); the top of the scraper (15) is in contact with the inner side of the second filter screen (5); a plurality of groups of the scrapers (15) are provided; the plurality of groups of the scrapers (15) form a circle.

5. The self-cleaning backwashing filter equipment according to claim 4 is characterized in that: A vertical plate (19) is fixedly connected to the surface of the second filter screen (5), a plug rod (20) is fixedly connected to one side of the vertical plate (19), and a plug hole (21) adapted to the plug rod (20) is provided on a side of the first circular ring (7) facing the plug rod (20), the plug hole (21) being in a T-shape.

6. The self-cleaning backwashing filter equipment according to claim 5 is characterized in that: An empty slot (22) is formed at one end of the top tube (6) located directly below the first circular ring (7). The empty slot (22) is communicated with the insertion hole (21). A second spring (23) is fixedly connected to the bottom of the inner cavity of the empty slot (22). A fixing pin (24) is fixedly connected to the top of the second spring (23). In a normal state of the second spring (23), the fixing pin (24) is inserted into the inner cavity of the insertion hole (21).

7. The self-cleaning backwashing filter equipment according to claim 6 is characterized in that: A transverse plate (25) is fixedly connected to the inner wall of the housing (1) and located above the first filter screen (4); a telescopic rod (26) is fixedly connected to the top of the transverse plate (25); a fixed plate (27) is fixedly connected to the top of the telescopic rod (26); and a round rod (28) is fixedly connected to one side of the fixed plate (27).

8. The self-cleaning backwashing filter equipment according to claim 4 is characterized in that: A docking plate (29) is provided on the surface of the second circular ring (12), the bottom end of the docking plate (29) passes through the second circular ring (12) and the top tube (6) in sequence and extends to the inner cavity of the top tube (6), and a circular hole (30) matching the round rod (28) is opened on the surface of the docking plate (29).

9. The self-cleaning backwashing filter equipment according to claim 1, characterized in that: The top and bottom of the second filter screen (5) are fixedly connected to a second slide rod (17), the top and bottom of the inner cavity of the shell (1) are provided with a second slide groove (18), and one end of the second slide rod (17) is slidably connected to the inner cavity of the second slide groove (18).

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