Scraper filtering device with backwashing function

Abstract

The utility model relates to the technical field of filtering equipment, and discloses a scraper filtering device with a backwashing function, which comprises a filtering bin, a sealing rotating seat is fixedly connected to the inner wall of the filtering bin, a scraper is fixedly connected to the inner wall of the filtering bin, a sewage discharging hopper is fixedly connected to the lower end of the filtering bin, and a sewage discharging valve is fixedly connected to the lower end of the sewage discharging hopper. According to the scraper filtering device with the backwashing function, the scraper plate is arranged, when the wedge-shaped filtering net is used for a period of time and the difference between the pressure in the filtering bin and the pressure in the water outlet bin measured by the pressure meter is too large, the controller starts the stepping motor to drive the filtering assembly to rotate, and the scraper plate makes contact with the wedge-shaped filtering net; when the stepping motor is started, the backflushing valve is started to input backflushing liquid, the backflushing liquid enters the backflushing pipe through the water inlet hole in the integrating pipe, the backflushing liquid is sprayed out of the backflushing nozzle, the impurities are discharged along with the backflushing liquid after the blow-down valve is opened, the filtering device is automatically cleaned, and the cleaning effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering equipment, in particular to a scraper filtering device with a backwashing function. Background Art

[0002] The scraper filter device is a highly efficient equipment in the field of liquid filtration. It has been widely used in many important fields such as industrial production and sewage treatment. Its core function is to remove those troublesome solid particle impurities in the liquid. During the filtration process, as time goes by, solid particles will continue to accumulate on the filter element. This accumulation phenomenon will bring many adverse effects, the most significant of which is that it will greatly increase the friction between the scraper and the filter element. The increase in friction will inevitably accelerate the wear of the filter element.

[0003] Fortunately, the emergence of the backwash function provides an effective solution to this problem. It can remove most of the accumulated impurities, thereby greatly reducing the contact frequency between the scraper and the filter element and reducing the degree of wear. In this way, it can effectively extend the service life of the filter element and provide a solid guarantee for the stable and efficient liquid filtration work.

[0004] Chinese utility model patent publication number: CN213790248U discloses a scraper filter with a backwash function. During operation, the filter is first closed, and a chemical solution containing solids enters the filter chamber through the solution inlet pipe. The solution is then filtered through a wedge-shaped filter element, and the filtered clean liquid flows out of the clean liquid outlet pipe, thereby achieving efficient filtration of the solution. The cleaning process is mainly divided into two steps: first, the external scraper cleans the filter element; second, the solution inlet pipe is closed, and steam is introduced for steam backwashing to scrape and flush away solids, oil, and other impurities adhering to the wedge-shaped filter element. Finally, these impurities are discharged from the slag discharge port, thereby achieving automatic cleaning of the wedge-shaped filter element. In addition, because the filter uses a wedge-shaped filter element, its filtration accuracy can reach 20 microns, and the cleaning effect is even better. However, this scraper filter with a backwash function has certain shortcomings. Its turret has no contact with the filter housing, resulting in poor stability during operation. When the filter is impacted, the connection between the turret and the steam inlet is prone to leakage, which will seriously affect the normal use of the filter. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a scraper filter device with a backwashing function, which can effectively solve the problems in the prior art.

[0006] The technical solution adopted by the utility model is: a scraper filter device with a backwash function, comprising a filter bin, the inner wall of the filter bin is fixedly connected to a sealing swivel, the inner wall of the filter bin is fixedly connected to a scraper, the lower end of the filter bin is fixedly connected to a sewage hopper, the lower end of the sewage hopper is fixedly connected to a sewage valve, the outer side of the filter bin is fixedly connected to a feed pipe, the upper end of the filter bin is fixedly connected to a water outlet bin, the upper end of the water outlet bin is fixedly connected to an integration pipe, the upper end of the integration pipe is fixedly connected to a stepping motor, the right side of the water outlet bin is fixedly connected to a discharge pipe, the left side of the integration pipe is fixedly connected to a backwash valve, a filter assembly is arranged inside the filter bin, a pressure gauge is fixedly connected to the front end of the filter bin, and a controller is fixedly connected to the front end of the water outlet bin;

[0007] The filter assembly includes a backwash pipe, a water inlet, a backwash nozzle, a fixing frame, a wedge-shaped filter and a swivel. The water inlet is opened on the outside of the backwash pipe, the backwash nozzle is fixedly connected to the outside of the backwash pipe, the fixing frame is fixedly connected to the outside of the backwash pipe, the wedge-shaped filter is fixedly connected to the outside of the fixing frame, and the swivel is fixedly connected to the outside of the wedge-shaped filter.

[0008] Preferably, six identical scrapers are provided, and the scrapers are made of polytetrafluoroethylene.

[0009] Through the above technical solution, a scraper is set. When the wedge-shaped filter has been used for a period of time, when the pressure gauge measures that the difference between the pressure in the filter chamber and the pressure in the water outlet chamber is too large, the controller starts the stepper motor to drive the filter assembly to rotate, and the scraper contacts the wedge-shaped filter. The scraper scrapes off the filtered impurities on the surface of the wedge-shaped filter. The polytetrafluoroethylene scraper is durable, has a long service life, and is not easily contaminated by impurities.

[0010] Preferably, the sewage hopper is a funnel-shaped structure, and the feed pipe is a spiral structure.

[0011] Through the above technical solution, the feed pipe is spiral-shaped. During filtration, the fluid to be filtered is injected into the feed pipe, forming a spiral downward vortex in the filter chamber, which fully contacts the wedge-shaped filter screen to improve the filtration efficiency. The clean liquid after filtration enters the water outlet chamber and is discharged from the discharge pipe. The impurities scraped off by the scraper and flushed down by backwashing are gathered in the sewage hopper. The sewage valve can be opened to discharge the impurities.

[0012] Preferably, the output pipe and the backflush pipe of the backflush valve both extend into the interior of the integrated pipe, and the water inlet hole corresponds to the backflush valve.

[0013] Through the above technical solution, when the pressure gauge measures that the difference between the pressure in the filter chamber and the pressure in the water outlet chamber is too large, the controller starts the backflush valve to input backflush liquid, and the backflush liquid enters the backflush pipe through the water inlet hole in the integrated pipe.

[0014] Preferably, the backflushing nozzle and the backflushing pipe are connected to each other, and the height of the backflushing nozzle is the same as the height of the wedge-shaped filter screen.

[0015] Through the above technical solution, the backflushing liquid is ejected from the backflushing nozzle, and after the drain valve is opened, impurities are discharged along with the backflushing liquid, and the filter device is automatically cleaned with good cleaning effect.

[0016] Preferably, the recoil tube is fixedly connected to the output end of the stepping motor.

[0017] Through the above technical solution, the controller controls the stepper motor, and each time the stepper motor is started, it rotates 400 degrees to clean the outer surface of the wedge-shaped filter. The backwash cleaning takes a short time and has a good cleaning effect.

[0018] Preferably, the swivel is adapted to the sealing swivel seat, and the swivel is rotatably connected to the sealing swivel seat.

[0019] Through the above technical solution, a sealing swivel is provided to cooperate with the filter assembly to separate the internal area of the device. The outside of the wedge-shaped filter is the dirty liquid area, and the inside and upper end of the wedge-shaped filter are the clean liquid area.

[0020] Compared with the prior art, the present invention provides a scraper filter device with backwashing function, which has the following beneficial effects:

[0021] 1. The scraper filter device with backwash function has a spiral feed pipe. When filtering, the fluid to be filtered is injected into the feed pipe, forming a spiral downward vortex in the filter chamber, which fully contacts the wedge-shaped filter screen, improving the filtration efficiency. A sealing swivel is provided to cooperate with the filter assembly to separate the internal area of the device. The outside of the wedge-shaped filter screen is the dirty liquid area, and the inside and upper end of the wedge-shaped filter screen are the clean liquid area. The filtered clean liquid enters the water outlet chamber and is discharged from the discharge pipe.

[0022] 2. The scraper filter device with backwash function is provided with a scraper. When the wedge-shaped filter has been used for a period of time, when the pressure gauge measures that the difference between the pressure in the filter bin and the pressure in the water outlet bin is too large, the controller starts the stepper motor to drive the filter assembly to rotate, and the scraper contacts the wedge-shaped filter and scrapes off the filtered impurities on the surface of the wedge-shaped filter. The polytetrafluoroethylene scraper is durable, has a long service life, and is not easily contaminated by impurities. When the stepper motor is started, the backwash valve is started at the same time to input backwash liquid. The backwash liquid enters the backwash pipe through the water inlet hole in the integrated pipe and is sprayed out from the backwash nozzle. After the drain valve is opened, the impurities are discharged with the backwash liquid, automatically cleaning the filter device with good cleaning effect. The controller controls the stepper motor. Each time the stepper motor is started, it rotates 400° to clean the outer surface of the wedge-shaped filter. The backwash cleaning takes a short time and has a good cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a schematic diagram of the three-dimensional structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0025] Figure 3 This is a schematic diagram of the three-dimensional cross-sectional structure of the utility model;

[0026] Figure 4 This is a schematic diagram of the disassembled structure of the filter assembly of the utility model;

[0027] Figure 5 It is a schematic diagram of the vertical section structure of the utility model.

[0028] Among them: 1. Filter chamber; 2. Sealing swivel; 3. Scraper; 4. Drain hopper; 5. Drain valve; 6. Feed pipe; 7. Water outlet chamber; 8. Integrated pipe; 9. Stepper motor; 10. Discharge pipe; 11. Backflush valve; 12. Filter assembly; 1201. Backflush pipe; 1202. Water inlet hole; 1203. Backflush nozzle; 1204. Fixed bracket; 1205. Wedge-shaped filter screen; 1206. Swivel; 13. Pressure gauge; 14. Controller. DETAILED DESCRIPTION

[0029] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0030] Example 1: Figure 1-5 As shown, the utility model provides a scraper filter device with backwashing function, including a filter bin 1, a sealing swivel seat 2 is fixedly connected to the inner wall of the filter bin 1, a scraper 3 is fixedly connected to the inner wall of the filter bin 1, a sewage hopper 4 is fixedly connected to the lower end of the sewage hopper 4, a sewage valve 5 is fixedly connected to the lower end of the sewage hopper 4, a feed pipe 6 is fixedly connected to the outside of the filter bin 1, a water outlet bin 7 is fixedly connected to the upper end of the filter bin 1, an integration pipe 8 is fixedly connected to the upper end of the water outlet bin 7, a stepping motor 9 is fixedly connected to the upper end of the integration pipe 8, a discharge pipe 10 is fixedly connected to the right side of the water outlet bin 7, a backwash valve 11 is fixedly connected to the left side of the integration pipe 8, a filter assembly 12 is arranged inside the filter bin 1, a pressure gauge 13 is fixedly connected to the front end of the filter bin 1, and a controller 14 is fixedly connected to the front end of the water outlet bin 7;

[0031] The filter assembly 12 includes a backwash pipe 1201, a water inlet 1202, a backwash nozzle 1203, a fixing frame 1204, a wedge-shaped filter screen 1205 and a swivel 1206. The water inlet 1202 is opened on the outside of the backwash pipe 1201, the backwash nozzle 1203 is fixedly connected to the outside of the backwash pipe 1201, the fixing frame 1204 is fixedly connected to the outside of the backwash pipe 1201, the wedge-shaped filter screen 1205 is fixedly connected to the outside of the fixing frame 1204, and the swivel 1206 is fixedly connected to the outside of the wedge-shaped filter screen 1205.

[0032] Specifically, six identical scrapers 3 are provided, and the scrapers 3 are made of polytetrafluoroethylene. The advantage of having scrapers 3 is that, after the wedge-shaped filter screen 1205 has been used for a period of time, if the pressure gauge 13 detects an excessive difference between the pressure in the filter chamber 1 and the pressure in the water outlet chamber 7, the controller 14 activates the stepper motor 9 to rotate the filter assembly 12, causing the scrapers 3 to contact the wedge-shaped filter screen 1205 and scrape off impurities from the surface of the wedge-shaped filter screen 1205. The polytetrafluoroethylene scrapers 3 are highly durable, have a long service life, and are not easily contaminated by impurities.

[0033] Specifically, the hopper 4 is funnel-shaped, and the feed pipe 6 is spiral. The advantage is that the spiral feed pipe 6 allows the fluid to be injected into the feed pipe 6 during filtration, forming a spiral downward vortex in the filter chamber 1, which fully contacts the wedge-shaped filter screen 1205, thereby improving filtration efficiency. The filtered clean liquid enters the water outlet chamber 7 and is discharged from the discharge pipe 10. Impurities scraped off by the scraper 3 and washed down by backwashing are collected in the hopper 4, and the impurities can be discharged by opening the drain valve 5.

[0034] Example 2: Figure 2-5 As shown, as an improvement to the previous embodiment.

[0035] Specifically, the output pipe of the backflush valve 11 and the backflush pipe 1201 both extend into the integrated pipe 8, and the water inlet 1202 corresponds to the backflush valve 11. Advantageously, when the pressure gauge 13 detects a significant pressure difference between the pressure in the filtration chamber 1 and the pressure in the water outlet chamber 7, the controller 14 activates the backflush valve 11 to introduce backflush liquid, which then flows through the water inlet 1202 within the integrated pipe 8 and into the backflush pipe 1201.

[0036] Specifically, the backflushing nozzle 1203 is connected to the backflushing pipe 1201, and the height of the backflushing nozzle 1203 is the same as the height of the wedge-shaped filter 1205. The advantage is that the backflushing liquid is ejected from the backflushing nozzle 1203, and after the drain valve 5 is opened, impurities are discharged with the backflushing liquid, automatically cleaning the filter device with a good cleaning effect.

[0037] Specifically, the backflushing pipe 1201 is fixedly connected to the output end of the stepper motor 9. Advantageously, the controller 14 controls the stepper motor 9, and each time the stepper motor 9 is started, the stepper motor 9 rotates 400 degrees to clean the outer surface of the wedge-shaped filter 1205. The backflushing cleaning process takes less time and has a good cleaning effect.

[0038] Specifically, the swivel 1206 is adapted to the sealing swivel 2, and the swivel 1206 is rotatably connected to the sealing swivel 2. The advantage is that the sealing swivel 2 is provided, and cooperates with the filter assembly 12 to separate the internal area of the device, with the outside of the wedge-shaped filter 1205 being the dirty liquid area, and the inside and upper end of the wedge-shaped filter 1205 being the clean liquid area.

[0039] Working principle: When in use, the fluid to be filtered is injected into the feed pipe 6, and a spiral downward vortex is formed in the filter chamber 1, which is in full contact with the wedge-shaped filter screen 1205 to improve the filtration efficiency. A sealing rotary seat 2 is provided to cooperate with the filter assembly 12 to separate the internal area of the device. The outside of the wedge-shaped filter screen 1205 is the dirty liquid area, and the inside and the upper end of the wedge-shaped filter screen 1205 are the clean liquid area. The filtered clean liquid enters the water outlet chamber 7 and is discharged from the discharge pipe 10. After the wedge-shaped filter screen 1205 has been used for a period of time, the pressure gauge 13 measures that the difference between the pressure in the filter chamber 1 and the pressure in the water outlet chamber 7 is too large, and the controller 14 starts the stepper motor 9 to drive the filter assembly 12 to rotate, and the scraper 3 and The wedge-shaped filter screen 1205 contacts each other, and the scraper 3 scrapes off the filtered impurities on the surface of the wedge-shaped filter screen 1205. The scraper 3 made of polytetrafluoroethylene is durable, has a long service life, and is not easily contaminated by impurities. When the stepper motor 9 is started, the backflush valve 11 is started to input the backflush liquid. The backflush liquid enters the backflush pipe 1201 through the water inlet 1202 in the integration pipe 8, and the backflush liquid is sprayed out from the backflush nozzle 1203. After the drain valve 5 is opened, the impurities are discharged with the backflush liquid, and the filter device is automatically cleaned with a good cleaning effect. The controller 14 controls the stepper motor 9. Each time the stepper motor 9 is started, it rotates 400° to clean the outer surface of the wedge-shaped filter screen 1205. The backflush cleaning takes a short time and has a good cleaning effect.

[0040] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A scraper filter device with backwashing function, comprising a filter chamber (1), characterized in that: The inner wall of the filter chamber (1) is fixedly connected to a sealing rotating seat (2), the inner wall of the filter chamber (1) is fixedly connected to a scraper (3), the lower end of the filter chamber (1) is fixedly connected to a sewage hopper (4), the lower end of the sewage hopper (4) is fixedly connected to a sewage valve (5), the outer side of the filter chamber (1) is fixedly connected to a feed pipe (6), the upper end of the filter chamber (1) is fixedly connected to a water outlet chamber (7), the upper end of the water outlet chamber (7) is fixedly connected to an integration pipe (8), the upper end of the integration pipe (8) is fixedly connected to a stepping motor (9), the right side of the water outlet chamber (7) is fixedly connected to a discharge pipe (10), the left side of the integration pipe (8) is fixedly connected to a backflush valve (11), a filter assembly (12) is provided inside the filter chamber (1), the front end of the filter chamber (1) is fixedly connected to a pressure gauge (13), and the front end of the water outlet chamber (7) is fixedly connected to a controller (14); The filter assembly (12) comprises a backwash pipe (1201), a water inlet (1202), a backwash nozzle (1203), a fixing frame (1204), a wedge-shaped filter (1205) and a swivel (1206); the water inlet (1202) is provided on the outside of the backwash pipe (1201); the backwash nozzle (1203) is fixedly connected to the outside of the backwash pipe (1201); the fixing frame (1204) is fixedly connected to the outside of the backwash pipe (1201); the wedge-shaped filter (1205) is fixedly connected to the outside of the fixing frame (1204); and the swivel (1206) is fixedly connected to the outside of the wedge-shaped filter (1205).

2. The scraper filter device with backwashing function according to claim 1, characterized in that: Six identical scrapers (3) are provided, and the scrapers (3) are made of polytetrafluoroethylene.

3. The scraper filter device with backwashing function according to claim 1, characterized in that: The sewage discharge hopper (4) has a funnel-shaped structure, and the feed pipe (6) has a spiral structure.

4. The scraper filter device with backwashing function according to claim 1, characterized in that: The output pipe of the backflush valve (11) and the backflush pipe (1201) both extend into the interior of the integrated pipe (8), and the water inlet hole (1202) corresponds to the backflush valve (11).

5. The scraper filter device with backwashing function according to claim 1, characterized in that: The backflushing nozzle (1203) and the backflushing pipe (1201) are connected to each other, and the height of the backflushing nozzle (1203) is the same as the height of the wedge-shaped filter (1205).

6. The scraper filter device with backwashing function according to claim 1, characterized in that: The recoil tube (1201) is fixedly connected to the output end of the stepping motor (9).

7. The scraper filter device with backwashing function according to claim 1, characterized in that: The rotating ring (1206) is adapted to the sealing rotating seat (2), and the rotating ring (1206) and the sealing rotating seat (2) are rotatably connected.

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