A backwash filter with efficient cleaning

Abstract

The application discloses a backwash filter with high cleaning efficiency, which comprises a filter tank body, a filter screen fixedly installed inside the filter tank body, and a cleaning assembly, wherein the filter screen is wedge-shaped; the cleaning assembly comprises a motor, a rotating shaft, mounting strips and a brush; the motor is fixedly installed on the upper end of the filter tank body; the rotating shaft is located inside the filter tank body; a plurality of the mounting strips are symmetrically arranged on both sides of the rotating shaft; the lengths of the mounting strips gradually decrease from top to bottom, and the mounting strips are staggered; the brush is slidably arranged inside the mounting strips through a centrifugal assembly; a buoyancy cleaning assembly comprises an extension rod, a buoyancy bag, a first thimble, a second thimble and elastic sheets; two moving grooves are symmetrically formed on both sides of the rotating shaft without the mounting strips. In the process of sewage discharge, the side wall of the filter screen is cleaned, so that the cleaning degree of the filter screen is improved, the cleaning period is prolonged, and the filtering efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the filter technical field, especially to a high-efficiency cleaning backwash filter. BACKGROUND

[0002] The filter element of the backwash filter adopts high-strength wedge-shaped filter screen, has the characteristics of large treatment capacity and high cleaning efficiency. Generally, differential pressure control and timing control are used for automatic cleaning of the filter screen. When the impurities accumulated on the surface of the filter screen cause the inlet and outlet differential pressure to reach the set value, the electric control box sends a signal to drive the motor to rotate, and the blowdown valve is opened. The impurities adsorbed on the filter screen are brushed off by the rotating steel brush and are discharged from the blowdown valve with the water flow. When the inlet and outlet pressure difference of the filter returns to normal or the backwashing time set by the timer ends, the motor stops running. The backwash filter is suitable for wastewater treatment processes, such as slag flushing water in steel plants, processes in power plants and cooling water, papermaking processes and water inlet, chemical production processes and irrigation systems.

[0003] During the blowdown process, due to the presence of small mass substances in the impurities, the impurities will move above the water surface due to the action of buoyancy, so that part of the impurities will adhere to the filter screen during the moving process, resulting in incomplete cleaning, shortening the cleaning cycle and reducing the filtering efficiency. SUMMARY

[0004] The purpose of the present application is to solve the problem that in the prior art, impurities will move above the water surface due to the action of buoyancy, so that part of the impurities will adhere to the filter screen during the moving process, resulting in incomplete cleaning, shortening the cleaning cycle and reducing the filtering efficiency. A high-efficiency cleaning backwash filter is provided.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A high-efficiency cleaning backwash filter, comprising:

[0007] A filter tank, a filter screen is fixedly installed inside the filter tank, and the filter screen is wedge-shaped;

[0008] A cleaning assembly, the cleaning assembly comprises a motor, a rotating shaft, a mounting strip and a brush, the motor is fixedly installed on the upper end of the filter tank, and the output end is fixedly connected with the rotating shaft, the rotating shaft is located inside the filter tank and coincides with the shaft center line of the filter tank and the filter screen, a plurality of mounting strips are symmetrically arranged on both sides of the rotating shaft, the lengths of the mounting strips gradually decrease from top to bottom, and the mounting strips are staggered, and the brush is slidably arranged in the mounting strip by a centrifugal assembly;

[0009] The buoyancy cleaning assembly comprises a telescopic rod, a buoyancy bag, a first ring, a second ring and an elastic sheet, two moving grooves are symmetrically arranged on both sides of the rotating shaft without the mounting strip, the buoyancy bag is arranged in the moving grooves, the rod is fixedly connected to the upper end of the buoyancy bag, the second ring is arranged between the two first rings, and the first ring and the second ring are staggered and connected to form a telescopic ring, and the elastic sheet is fixedly connected between two adjacent second rings and is in an arc shape.

[0010] Preferably, the filter tank body comprises a main body, a water inlet pipe, a water outlet pipe and a sewage pipe, the water inlet pipe is fixedly connected to the upper end of the side of the main body and communicates with the inside of the filter screen, the water outlet pipe is fixedly connected to the bottom end of the side of the main body and communicates with the inside of the main body, and the sewage pipe is fixedly arranged on the bottom of the main body and communicates with the bottom of the filter screen.

[0011] Preferably, the centrifugal assembly comprises a gravity block, an extension rod and a stay, the mounting strip is internally provided with a mounting groove, the gravity block is slidingly arranged in the mounting groove, the extension rod is fixedly connected between the gravity block and the brush, and the stay is fixedly connected to the side wall of the mounting groove at one end and to the gravity block at the other end.

[0012] Preferably, when the centrifugal assembly is not subjected to external force, the brush is spaced apart from the inner wall of the filter screen, and the spacing is greater than the width of the telescopic ring.

[0013] Preferably, the first ring is an open ring, and the opening is located downward, the first ring is fixedly connected with a scraping strip on the side close to the filter screen, the second ring is slidingly arranged in the first ring, and the bottom is fixedly connected with a scraping strip, and the scraping strip is located in the opening.

[0014] Preferably, the telescopic rod is fixedly connected with a tension assembly, and the tension assembly is used for pulling the telescopic ring to shrink and move downward.

[0015] Preferably, the tension assembly comprises a pulling rope and a pulling block, the pulling block is slidingly arranged in the moving groove, and the pulling rope is fixedly connected between the pulling block and the rod.

[0016] Preferably, the mounting strip is fixedly provided with a cleaning assembly above, and the cleaning assembly is used for cleaning the filter material on the brush.

[0017] Preferably, the cleaning assembly comprises a cleaning tooth and an elastic shaft, the elastic shaft is fixedly connected to the end of the mounting strip, the cleaning tooth is fixedly arranged on the elastic shaft and is arranged in an inclined downward manner, and the brush is in contact with the cleaning tooth during movement.

[0018] Compared with the prior art, the present application has the following beneficial effects:

[0019] When the import and export differential pressure reaches the set value, the cleaning assembly is started, and when the sewage needs to be discharged after cleaning, the stretchable ring is located on the upper side of the water surface due to the filling of the buoyancy bag with a gas with small density, and moves downward with the water level, and in the process of moving downward of the stretchable ring, the second sleeve ring moves to the inside of the first sleeve ring due to the extrusion of the filter screen sidewall, so as to reduce the diameter of the stretchable ring, and the water level movement is always consistent with the diameter of the filter screen, so that the impurities adhered to the inner wall of the filter screen are cleaned in the process of moving downward, and the cleaning degree of the filter screen is improved, the cleaning period is prolonged, and the filtering efficiency is improved;

[0020] Since the brush needs to be in contact with the inner wall of the filter screen in the cleaning process, but the buoyancy cleaning assembly needs to move downward normally without being blocked by the brush in the process of draining water, the centrifugal assembly is subjected to the centrifugal force in the cleaning process, so that the brush moves outward and is in contact with the filter screen, and in the process of discharging sewage, the centrifugal assembly is not subjected to the centrifugal force, and the brush is pulled back to the original position, and is automatically adjusted according to the use condition;

[0021] In the process of cleaning the sidewall of the filter screen, part of the impurities is accumulated on the brush, so that the impurities are not completely cleaned, and the brush moves back and forth under the action of the centrifugal assembly, so that the elastic cleaning teeth clean the impurities on the brush in the moving process of the brush, so that the brush is clean, and the normal movement of the brush is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 An external structure diagram of the high-efficiency cleaning backwashing filter is provided.

[0023] Figure 2 An internal sectional view of the high-efficiency cleaning backwashing filter is provided.

[0024] Figure 3 A filter screen structure diagram of the high-efficiency cleaning backwashing filter is provided.

[0025] Figure 4 A cleaning assembly structure diagram of the high-efficiency cleaning backwashing filter is provided.

[0026] Figure 5 A cleaning assembly sectional view of the high-efficiency cleaning backwashing filter is provided.

[0027] Figure 6 A stretchable ring sectional view of the high-efficiency cleaning backwashing filter is provided.

[0028] Figure 7 AFigure 4 Enlarged view at middle A.

[0029] In the figure: 1 filter tank body, 11 main body, 12 water inlet pipe, 13 water outlet pipe, 14 blowdown pipe, 2 filter screen, 3 cleaning assembly, 31 motor, 32 rotating shaft, 33 mounting strip, 34 brush, 4 buoyancy cleaning assembly, 41 telescopic rod, 42 buoyancy bag, 43 first sleeve ring, 44 second sleeve ring, 45 elastic sheet, 51 gravity block, 52 extension rod, 53 tension bar, 6 pull rope, 7 pull block, 8 cleaning tooth, 9 elastic shaft, 10 scraping strip. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0031] The terms such as "upper", "lower", "left", "right", "middle" and "one" cited in the present application are only for the convenience of clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship is also regarded as the scope of the present application without substantial change of the technical content.

[0032] Reference Figures 1-7 A high-efficiency cleaning backwash filter, comprising:

[0033] The filter tank body 1 is internally fixedly installed with the filter screen 2, and the filter screen 2 is wedge-shaped.

[0034] The cleaning assembly 3 comprises a motor 31, a rotating shaft 32, a mounting strip 33 and a brush 34. The motor 31 is fixedly installed on the upper end of the filter tank body 1, and the output end is fixedly connected with the rotating shaft 32. The rotating shaft 32 is located inside the filter tank body 1, and coincides with the axis of the filter tank body 1 and the filter screen 2. A plurality of mounting strips 33 are symmetrically arranged on both sides of the rotating shaft 32. The lengths of the mounting strips 33 gradually decrease from top to bottom, and are staggered. The brush 34 is slidably arranged inside the mounting strip 33 through a centrifugal assembly.

[0035] The buoyancy cleaning assembly 4 comprises a telescopic rod 41, a buoyancy bag 42, a first sleeve ring 43, a second sleeve ring 44 and an elastic sheet 45. Two moving grooves are symmetrically formed on both sides of the rotating shaft 32 where the mounting strips 33 are not installed. The buoyancy bag 42 is limitingly arranged inside the moving grooves. The rod is fixedly connected on the upper end of the buoyancy bag 42. The second sleeve ring 44 is limitingly sleeved between the two first sleeve rings 43, and the first sleeve ring 43 and the second sleeve ring 44 are staggered and connected, forming a telescopic ring. The elastic sheet 45 is fixedly connected between two adjacent second sleeve rings 44, and is arc-shaped.

[0036] In the embodiment of the application, when the import and export differential pressure reaches the set value, the cleaning assembly 3 is started, the motor 31 drives the rotating shaft 32 to rotate, and the brush 34 is in contact with the inner wall of the filter screen 2 under the action of the centrifugal assembly during rotation, and the adhered impurities on the filter screen 2 are cleaned, when the cleaning is completed and the sewage needs to be discharged, the buoyancy bag 42 is filled with a gas with a small density, so that the telescopic ring is located on the upper side of the water surface and moves downward with the water level, and during the movement of the telescopic ring, the telescopic ring is extruded by the side wall of the filter screen 2, so that the second sleeve 44 moves into the first sleeve 43, thereby reducing the diameter of the telescopic ring, and the water level always moves in line with the diameter of the filter screen 2, so that the adhered impurities on the inner wall of the filter screen 2 are cleaned during the movement, and the cleaning degree of the filter screen 2 is improved, the cleaning period is prolonged, and the filtering efficiency is improved.

[0037] In the preferred technical solution of the embodiment, the filter tank 1 comprises a main body 11, a water inlet pipe 12, a water outlet pipe 13 and a sewage discharge pipe 14, the water inlet pipe 12 is fixedly connected to the upper end of the side of the main body 11 and communicates with the inside of the filter screen 2, the water outlet pipe 13 is fixedly connected to the bottom end of the side of the main body 11 and communicates with the inside of the main body 11, the sewage discharge pipe 14 is fixedly installed at the bottom of the main body 11 and communicates with the bottom of the filter screen 2, the water to be treated is introduced into the filter screen 2 through the water inlet pipe 12, and the filtered water is discharged into the inside of the main body 11 through the filter effect of the filter screen 2, and the filtered water is discharged through the water outlet pipe 13, and when the impurities are cleaned, the sewage valve is opened, the impurities adsorbed on the filter screen 2 are brushed by the rotating brush 34 and are discharged from the sewage valve with the water flow;

[0038] The centrifugal assembly comprises a gravity block 51, an extension rod 52 and a tension strip 53, the installation slot is arranged in the installation strip 33, the gravity block 51 is slidably arranged in the installation slot, the extension rod 52 is fixedly connected between the gravity block 51 and the brush 34, and the tension strip 53 is fixedly connected at one end to the side wall of the installation slot and at the other end to the gravity block 51, during the cleaning process, the motor 31 drives the rotating shaft 32 to rotate, so that the centrifugal assembly in the installation strip 33 rotates, and during the rotation, the gravity block 51 is subjected to a large centrifugal force and moves to the outside of the installation slot, and in the movement process, the extension rod 52 and the brush 34 are extruded, so that the brush 34 is extruded to contact the inner wall of the filter screen 2, and the brush 34 rotates under the electric drive of the motor 31, so as to clean the filter screen 2;

[0039] When the centrifugal assembly is not subjected to external force, the brush 34 is spaced apart from the inner wall of the filter screen 2, and the spacing is greater than the width of the telescopic ring. Since the filter screen 2 needs to ensure that the brush 34 is in contact with the inner wall of the filter screen 2 during cleaning, but needs to ensure that the buoyancy cleaning assembly 4 normally moves downward without being blocked by the brush 34 during drainage, the centrifugal assembly is subjected to centrifugal force during the cleaning process, so that the brush 34 moves outward and contacts the filter screen 2. During the drainage process, the centrifugal assembly is not subjected to centrifugal force, and the brush 34 is pulled back to the original position;

[0040] The first sleeve ring 43 is an open ring, and the opening is located at the lower side. The first sleeve ring 43 is fixedly connected with a scraping strip 10 on the side close to the filter screen 2. The second sleeve ring 44 is slidingly arranged in the first sleeve ring 43, and the bottom is fixedly connected with a scraping strip 10. The scraping strip 10 is located in the opening. In order to ensure that the buoyancy cleaning assembly 4 effectively cleans the impurities remaining on the inner wall of the filter screen 2 during drainage, the scraping strip 10 is used to ensure the cleaning of the impurities.

[0041] The telescopic rod 41 is fixedly connected with a tension assembly. The tension assembly is used to pull the telescopic ring to shrink and move downward. Since the telescopic ring needs to shrink during use, in order to avoid the telescopic ring being blocked and unable to normally shrink and move downward, the tension assembly is used to pull the telescopic ring.

[0042] The tension assembly includes a pulling rope 6 and a pulling block 7. The pulling block 7 is slidingly arranged in the moving groove. The pulling rope 6 is fixedly connected between the pulling block 7 and the telescopic rod 41. Since the wedge-shaped filter screen 2 generates downward vortexes due to the diameter during water outlet, the pulling block 7 is subjected to downward suction force during the drainage process, so that the telescopic rod 41 is pulled by the pulling block 7 and the pulling rope 6, to ensure that the buoyancy cleaning assembly 4 is subjected to sufficient tension to shrink and move downward during the drainage process.

[0043] The mounting strip 33 is fixedly provided with a debris removal assembly above. The debris removal assembly is used to clean the filter material on the brush. During the process of cleaning the side wall of the filter screen 2, part of the impurities will accumulate on the brush 34, causing incomplete cleaning of the impurities.

[0044] The debris removal assembly includes a cleaning tooth 8 and an elastic shaft 9. The elastic shaft 9 is fixedly connected to the end of the mounting strip 33. The cleaning tooth 8 is fixedly installed on the elastic shaft 9 and is inclined downward. The brush 34 is in contact with the cleaning tooth 8 during movement. The brush 34 moves back and forth under the action of the centrifugal assembly, so that the cleaning tooth 8 connected in an elastic manner cleans the impurities on the brush 34 during the movement of the brush 34, to ensure that the brush 34 is clean and does not affect the normal movement of the brush 34.

[0045] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A backwash filter for efficient cleaning, characterized in that Include: Filter tank (1), the filter tank (1) is fixedly installed with filter screen (2) inside, the filter screen (2) is wedge-shaped; Cleaning assembly (3), the cleaning assembly (3) includes motor (31), rotating shaft (32), installation strip (33) and brush (34), the motor (31) is fixedly installed on the upper end of filter tank (1), and the output end is fixedly connected with rotating shaft (32), the rotating shaft (32) is located inside filter tank (1), and coincides with the axis of filter tank (1) and filter screen (2), a plurality of installation strips (33) are symmetrically arranged on both sides of rotating shaft (32), the length of installation strip (33) gradually becomes shorter from top to bottom, and is staggered, the brush (34) is slidably arranged in the installation strip (33) by centrifugal assembly; Buoyancy cleaning assembly (4), the buoyancy cleaning assembly (4) includes telescopic rod (41), buoyancy bag (42), first collar (43), second collar (44) and elastic sheet (45), the two sides of rotating shaft (32) are symmetrically provided with two moving grooves, the buoyancy bag (42) is limitingly arranged in the moving groove, the telescopic rod is fixedly connected to the upper end of the buoyancy bag (42), the second collar (44) is limitingly sleeved between the two first collars (43), and the first collar (43) and the second collar (44) are staggered and connected, forming a telescopic ring, the elastic sheet (45) is fixedly connected between two adjacent second collars (44), and is arc-shaped, the first collar (43) is an open ring, and the opening is located at the lower side, the first collar (43) is fixedly connected with a scraping strip (10) on the side close to the filter screen (2), the second collar (44) is slidably arranged in the first collar (43), and the bottom is fixedly connected with a scraping strip (10), the scraping strip (10) is located in the opening; The telescopic rod (41) is fixedly connected with a tension assembly, and the tension assembly is used for pulling the telescopic ring to shrink and move downward.

2. The backwash filter for high-efficiency cleaning according to claim 1, characterized in that, The filter tank (1) includes a main body (11), a water inlet pipe (12), a water outlet pipe (13) and a blowdown pipe (14), the water inlet pipe (12) is fixedly connected to the upper end of the side of the main body (11), and is communicated to the inside of the filter screen (2), the water outlet pipe (13) is fixedly connected to the bottom end of the side of the main body (11), and is communicated with the inside of the main body (11), the blowdown pipe (14) is fixedly installed at the bottom of the main body (11), and is communicated with the bottom of the filter screen (2).

3. A backwash filter for efficient cleaning according to claim 1, wherein The centrifugal assembly includes gravity block (51), extension rod (52) and tension strip (53), the installation slot is formed in the installation strip (33), the gravity block (51) is slidably arranged in the installation slot, the extension rod (52) is fixedly connected between the gravity block (51) and the brush (34), and the tension strip (53) is fixedly connected at one end to the side wall of the installation slot, and is fixedly connected at the other end to the gravity block (51).

4. A backwash filter for efficient cleaning according to claim 3, characterized in that When the centrifugal assembly is not subjected to external force, the brush (34) and the inner wall of the filter screen (2) have a spacing, and the spacing is greater than the width of the telescopic ring.

5. A backwash filter for efficient cleaning according to claim 4, characterized in that The pulling force assembly comprises a pulling rope (6) and a pulling block (7), the pulling block (7) is slidingly arranged in the moving groove, and the pulling rope (6) is fixedly connected between the pulling block (7) and the telescopic rod (41).

6. A backwash filter for efficient cleaning according to claim 5, wherein A foreign matter removing assembly is fixedly arranged above the mounting strip (33), and the foreign matter removing assembly is used for cleaning the filter on the brush hair.

7. A backwash filter for efficient cleaning according to claim 6, characterized in that The foreign matter removing assembly comprises cleaning teeth (8) and elastic shafts (9), the elastic shafts (9) are fixedly connected to the ends of the mounting strip (33), the cleaning teeth (8) are fixedly arranged on the elastic shafts (9) and are arranged in an inclined downward manner, and the brush (34) is in contact with the cleaning teeth (8) during movement.

Images