A candle type liquid filtering device

Abstract

The application discloses a candle type liquid filtering device and belongs to the technical field of wastewater treatment. The candle type liquid filtering device comprises a barrel body, and a decontamination component is arranged on the inside and outside of the barrel body. The decontamination component comprises a first servo motor arranged on the upper side of a top cover. The output end of the first servo motor is fixedly connected with a lead screw. The outer side of the lead screw is threadedly connected with a lead screw nut. The outer side of the lead screw nut is sleeved with a movable disc. The residual residues and filter cakes on the surface of the ceramic filter core are scraped off in the process of downward movement of the scraping ring. Since the residual impurities on the surface of the ceramic filter core can be removed by the scraping ring in the process of downward movement of the movable disc, the residual filter cakes are effectively prevented from breeding bacteria, so that the liquid is prevented from being polluted when filtering the liquid subsequently. Meanwhile, the scraping ring can also treat the filter cakes on the surface of the ceramic filter core after repeated upward and downward movement, so that the service life and cleanness of the ceramic filter core are ensured.

Description

[0001] Technical field.

[0002] This invention relates to the field of wastewater treatment technology, and more specifically, to a candle-type liquid filtration device. Background Technology

[0003] Candle filters are mainly composed of a cylinder, filter element, filter cloth, filter aid, computer control system, and accessories. Other auxiliary equipment includes an air compressor and pressure sensor. The cylinder and filter element are mainly made of stainless steel, carbon steel, titanium, and ceramics, while the filter cloth is mainly made of polypropylene, polyester, polyphenylene sulfide, and polytetrafluoroethylene. Because its shape resembles a candle, it is called a candle filter.

[0004] Candle filters use filter cartridges as the frame and solid particles or filter aids as the filter media. They use pumps to pressurize the liquid to achieve clarification. The suspension to be treated enters from the top inlet of the filter and is evenly distributed by the feed distributor before flowing over the surface of each filter cartridge. During filtration, solid particles are effectively trapped on the filter cloth by the filter cartridges. These solid particles gradually accumulate on the surface of the filter cloth to form a dense filter cake. When the filter cake reaches a certain thickness and affects the filtration efficiency, the system will start a backflushing or cleaning program to remove the old filter cake layer and start a new filtration cycle.

[0005] In the prior art, during the backwashing process, the water and air pressure generated by the backwashing process will peel off the fixed particles remaining in the pores on the outside of the ceramic filter element and the filter cake on the surface of the ceramic filter element. However, a small amount of filter cake will still remain during the peeling process, and the remaining filter cake will breed bacteria, causing the liquid to be contaminated during subsequent filtration. Summary of the Invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a candle-type liquid filtration device.

[0007] To solve the above problems, the present invention adopts the following technical solution, which can remove the impurities remaining on the surface of the ceramic filter element, effectively avoid the growth of bacteria in the residual filter cake, and prevent the liquid from being contaminated during subsequent filtration, so as to ensure the service life and cleanliness of the ceramic filter element.

[0008] A candle-type liquid filtration device includes a barrel and a top cover disposed on the upper side of the barrel. The lower side of the top cover is arranged in a circular array and a ceramic filter element is disposed at the center of the lower side. The barrel is provided with impurity removal components both inside and outside.

[0009] The impurity removal component includes a first servo motor mounted on the upper side of the top cover. The output end of the first servo motor is fixedly connected to a lead screw. A lead screw nut is threaded onto the outer side of the lead screw nut. A movable disc is sleeved on the outer side of the lead screw nut. The movable disc is slidably connected inside the barrel. The lower side of the movable disc is arranged in a circular array, and a scraper ring is fixedly connected to the center of the lower side. A guide rod is fixedly connected to the right side of the inside of the barrel, and the movable disc is slidably sleeved on the outer side of the guide rod.

[0010] Furthermore, the inner surface of the scraper ring slides in contact with the outer surface of the ceramic filter element, and the lower side of the scraper ring is chamfered.

[0011] Furthermore, the interior of the barrel is provided with a crushing component, which includes a first through hole extending through the surface of the movable disc.

[0012] Furthermore, a sealing plate is hinged to the lower inner wall of the first through hole. The sealing plate is L-shaped. A return spring is fixedly connected between the other inner wall of the first through hole and the upper side of the sealing plate. A limit strip is fixedly connected to the lower side of the movable disc. The upper side of the sealing plate is inclined. After the lower side of the horizontal part of the sealing plate rotates, it presses against the inclined surface of the limit strip.

[0013] Furthermore, a storage cavity is provided inside the top cover, and a conduit is fixedly connected to the right side of the top cover. The conduit is connected to the storage cavity, and the other end of the conduit is connected to an external backwashing device.

[0014] Furthermore, a detection component is provided both inside and outside the barrel, and the detection component includes a water inlet pipe fixedly connected to the outside of the barrel.

[0015] Furthermore, the water inlet pipe is connected to the barrel body, a positioning plate is fixedly connected to the upper side of the inside of the water inlet pipe, a baffle is rotatably connected inside the water inlet pipe, the right side of the positioning plate is pressed against the upper left side of the baffle, and a counterweight is fixedly connected to the lower side of the baffle.

[0016] Furthermore, the shape of the baffle and counterweight combination is adapted to the shape of the inner wall of the water inlet pipe. Motion sensors are fixedly connected to both the front and rear sides of the baffle, and a controller is provided on the front of the top cover. Both the motion sensors and the controller are electrically connected to an external power supply.

[0017] Furthermore, the top cover is equipped with a backwashing assembly both inside and outside, and the backwashing assembly includes a transfer box fixedly connected to the left and right sides of the lower end inside the top cover.

[0018] Furthermore, the ceramic filter element is divided into two groups, the transfer box is connected to the ceramic filter element, the upper side of the transfer box is fixedly connected to a conveying pipe, the upper side of the top cover is provided with a second servo motor, the output end of the second servo motor is fixedly connected to a turntable, the upper side of the turntable is provided with three second through holes, and after the turntable rotates, the second through holes are connected to the conveying pipe.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] (1) The present invention scrapes off the residue and filter cake on the surface of the ceramic filter element by the scraping ring as it moves downward. As the moving disc moves downward, the scraping ring can remove the impurities remaining on the surface of the ceramic filter element, effectively preventing the residual filter cake from breeding bacteria and causing the liquid to be contaminated during subsequent filtration. At the same time, the scraping ring can also process the filter cake on the surface of the ceramic filter element after repeated up and down movement, so as to ensure the service life and cleanliness of the ceramic filter element.

[0021] (2) The present invention squeezes the water source and filter cake as the movable disc moves downward. As the movable disc moves downward, it will squeeze the water source and the filter cake inside the water source. After the filter cake is broken, it will be easier to be discharged from the bottom of the barrel, avoiding the blockage of the top of the barrel by the large volume of filter cake. At the same time, the movable disc squeezes the water source to accelerate the water flow, thereby increasing the discharge speed of the filter cake.

[0022] (3) The present invention drives the operation sensor to rotate during the rotation of the baffle and transmits the signal to the controller, and finally controls the operation of the backwashing component. Since the rotation of the baffle can be used to detect whether the water inlet pipe continues to input wastewater into the tank for treatment, the detection result will affect whether the backwashing component operates, thereby achieving the purpose of controlling the operation of the backwashing component, and at the same time preventing wastewater from flowing back into the water inlet pipe. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention;

[0024] Figure 2 This is a frontal cross-sectional view of the present invention;

[0025] Figure 3 This is a schematic cross-sectional view of the barrel body of the present invention from below;

[0026] Figure 4 This is a top view of the movable disc of the present invention;

[0027] Figure 5 This is a frontal cross-sectional view of the movable disk of the present invention;

[0028] Figure 6This is a cross-sectional view of the top cover of the present invention from the front.

[0029] Figure 7 This is a schematic cross-sectional view of the catheter of the present invention from the front view;

[0030] Figure 8 This is a schematic cross-sectional view of the conveying pipe of the present invention from a bottom view.

[0031] Explanation of the labels in the diagram:

[0032] 1. Barrel body; 11. Top cover; 12. Ceramic filter element; 2. Impurity removal component; 21. First servo motor; 22. Lead screw; 23. Lead screw nut; 24. Movable disc; 25. Scraper ring; 26. Guide rod; 27. Crushing component; 271. First through hole; 272. Sealing plate; 273. Return spring; 274. Limiting strip; 275. Storage chamber; 276. Conduit; 28. Detection component; 281. Water inlet pipe; 282. Positioning plate; 283. Baffle; 284. Counterweight; 285. Motion sensor; 286. Controller; 29. ​​Backwashing component; 291. Transfer box; 292. Conveying pipe; 293. Second servo motor; 294. Turntable; 295. Second through hole. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] Please see Figures 1 to 8 A candle-type liquid filtration device includes a barrel 1 and a top cover 11 disposed on the upper side of the barrel 1. The lower side of the top cover 11 is arranged in a circular array and a ceramic filter element 12 is disposed at the center of the lower side. The barrel 1 is provided with a cleansing component 2 both inside and outside.

[0035] The impurity removal component 2 includes a first servo motor 21 disposed on the upper side of the top cover 11. A lead screw 22 is fixedly connected to the output end of the first servo motor 21. A lead screw nut 23 is threadedly connected to the outer side of the lead screw 22. A movable disc 24 is sleeved on the outer side of the lead screw nut 23. The movable disc 24 is slidably connected inside the barrel 1. The lower side of the movable disc 24 is arranged in a circular array and a scraper ring 25 is fixedly connected to the center of the lower side. A guide rod 26 is fixedly connected to the right side of the inside of the barrel 1. The movable disc 24 is slidably sleeved on the outer side of the guide rod 26.

[0036] The inner surface of the scraper ring 25 slides in contact with the outer surface of the ceramic filter element 12, and the lower side of the scraper ring 25 is chamfered.

[0037] By adopting the above technical solution, during the operation of the external backwashing equipment, the first servo motor 21 above the top cover 11 drives the lead screw 22 to rotate. After the lead screw 22 rotates, the lead screw nut 23 on its outer side will start to move according to the direction of the external thread of the lead screw 22. Since a movable disc 24 is sleeved on the outer side of the lead screw nut 23, and the other side of the movable disc 24 is sleeved on the outer side of the guide rod 26, the movable disc 24 will also slide downward on the outer side of the guide rod 26 as the lead screw nut 23 drives the movable disc 24 to move downward. At the same time, multiple ceramic filter elements 12 pass through the movable disc 24, allowing the movable disc 24 to slide freely on the outer side of the ceramic filter elements 12. The scraper ring 25, which is located below the movable disc 24 and wraps around the outer surface of the ceramic filter elements 12, will also slide on the outer side of the ceramic filter elements 12 and move downward. After the backwashing equipment removes the filter cake from the surface of the ceramic filter element 12, the downward-moving scraper ring 25 further cleans the remaining impurities on the surface of the ceramic filter element 12. If the external backwashing equipment is not started, the scraper can also directly clean the filter cake on the surface of the ceramic filter element 12. After the movable disc 24 moves up and down repeatedly several times, the filter cake and residual impurities will fall into the depth of the tank 1 and eventually be discharged from the tank 1 together. As the movable disc 24 moves downward, the scraper ring 25 can remove the residual impurities on the surface of the ceramic filter element 12, effectively preventing the residual filter cake from breeding bacteria and causing the liquid to be contaminated during subsequent filtration. At the same time, the scraper ring 25 can also process the filter cake on the surface of the ceramic filter element 12 after repeated up and down movements, so as to ensure the service life and cleanliness of the ceramic filter element 12.

[0038] like Figures 2 to 5 As shown, the inside of the barrel 1 is provided with a crushing component 27, which includes a first through hole 271 that penetrates the surface of the movable disc 24.

[0039] A sealing plate 272 is hinged to the lower inner wall of the first through hole 271. The sealing plate 272 is L-shaped. A return spring 273 is fixedly connected between the other inner wall of the first through hole 271 and the upper side of the sealing plate 272. A limit strip 274 is fixedly connected to the lower side of the movable disk 24. The upper side of the sealing plate 272 is inclined. After the lower side of the horizontal part of the sealing plate 272 rotates, it presses against the inclined surface of the limit strip 274.

[0040] The top cover 11 has a storage cavity 275 inside. A conduit 276 is fixedly connected to the right side of the top cover 11. The conduit 276 is connected to the storage cavity 275, and the other end of the conduit 276 is connected to an external backwashing device.

[0041] By adopting the above technical solution, as the external backwashing device injects high-pressure liquid into the storage chamber 275, the high-pressure liquid then enters the ceramic filter element 12. At this time, the pressure generated by the high-pressure liquid will flush away the solid particles remaining in the pores on the surface of the ceramic filter element 12 and process the filter cake on the surface of the ceramic filter element 12, causing the filter cake to fall off the surface of the ceramic filter element 12. At the same time, as the movable disc 24 moves downward, the "L"-shaped sealing plate 272 is pulled into the first through hole 271 by the return spring 273 and seals the first through hole 271. This allows the sealing plate 272 to help the movable disc 24 move downward during the process. The water source and filter cake below are squeezed. When the movable disc 24 moves upward, if there is water above the movable disc 24, the gravity generated by part of the water source will be applied to the sealing plate 272, causing the sealing plate 272, which is hinged inside the first through hole 271, to rotate. At this time, the upper and lower parts of the movable disc 24 will be connected, and the water source above the movable disc 24 will be discharged. As the movable disc 24 moves downward, it will squeeze the water source and the filter cake inside the water source. After the filter cake is broken, it will be easier to be discharged from the bottom of the barrel 1, avoiding the blockage of the upper part of the barrel 1 by the large volume of filter cake. At the same time, the squeezing of the water source by the movable disc 24 can accelerate the water flow, thereby increasing the discharge speed of the filter cake.

[0042] like Figure 2 and Figure 8 As shown, a detection component 28 is provided both inside and outside the barrel 1. The detection component 28 includes a water inlet pipe 281 fixedly connected to the outside of the barrel 1.

[0043] The water inlet pipe 281 is connected to the barrel body 1. A positioning plate 282 is fixedly connected to the upper side of the inside of the water inlet pipe 281. A baffle 283 rotates inside the water inlet pipe 281. The right side of the positioning plate 282 is pressed against the upper left side of the baffle 283. A counterweight block 284 is fixedly connected to the lower side of the baffle 283.

[0044] The shape of the baffle 283 and the counterweight 284 after combination is adapted to the shape of the inner wall of the water inlet pipe 281. Motion sensors 285 are fixedly connected to both the front and rear sides of the baffle 283. A controller 286 is provided on the front of the top cover 11. Both the motion sensor 285 and the controller 286 are electrically connected to an external power supply.

[0045] The top cover 11 is equipped with a backwashing assembly 29 both inside and outside.

[0046] By adopting the above technical solution, as the inlet pipe 281 inputs wastewater into the tank 1, the wastewater entering the inlet pipe 281 will push the baffle 283. Because the upper left side of the baffle 283 is restricted by the positioning plate 282, the baffle 283 will only rotate clockwise. At the same time as the baffle 283 rotates, the motion sensor 285 on its outer side will also start to rotate. Then the motion sensor 285 sends a signal to the controller 286, and the controller 286 controls the backwashing component 29 to operate. When the inlet pipe 281 stops supplying wastewater, the baffle 283 will be reset by the weight of the counterweight 284 below it and block the inlet pipe 281. Since the rotation of the baffle 283 can be used to detect whether the inlet pipe 281 continues to input wastewater into the tank 1 for treatment, the detection result will affect whether the backwashing component 29 operates, thereby achieving the purpose of controlling the operation of the backwashing component 29 and preventing wastewater from flowing back into the inlet pipe 281.

[0047] like Figure 6 and Figure 7 As shown, the backwash assembly 29 includes a transfer box 291 fixedly connected to the left and right sides of the lower end inside the top cover 11.

[0048] The ceramic filter element 12 is divided into two groups. The transfer box 291 is connected to the ceramic filter element 12. The upper side of the transfer box 291 is fixedly connected to the conveying pipe 292. The upper side of the top cover 11 is provided with a second servo motor 293. The output end of the second servo motor 293 is fixedly connected to the turntable 294. The upper side of the turntable 294 is provided with three second through holes 295. After the turntable 294 rotates, the second through holes 295 are connected to the conveying pipe 292.

[0049] By adopting the above technical solution, when the inlet pipe 281 does not need to transport wastewater, two of the second through holes 295 on the surface of the turntable 294 will be connected to the conveying pipes 292 above the two transfer boxes 291, respectively. This allows the external backwashing equipment to send high-pressure liquid into the storage chamber 275, which can then directly enter the ceramic filter element 12 through the conveying pipe 292. If the motion sensor 285 transmits a signal to the controller 286, the controller 286 will start the second servo motor 293 to drive the turntable 294 to rotate 90 degrees counterclockwise or clockwise. This causes the solid part of the turntable 294 to block the top of one of the conveying pipes 292, while the other conveying pipe 292 flows normally. At this time, the water source drawn into the storage chamber 275... The pressure provided by the external backwashing device enters the normally flowing conveying pipe 292, and then is conveyed to the corresponding ceramic filter elements 12 for backwashing. The remaining ceramic filter elements 12 continue to filter the wastewater. Then, the second servo motor 293 continues to drive the turntable 294 to rotate 180 degrees in the same direction as before, so that another conveying pipe 292 is connected to the storage chamber 275, while the previously connected conveying pipe 292 will be blocked. At this time, the remaining ceramic filter elements 12 will perform backwashing operation, and the ceramic filter elements 12 that have completed the backwashing operation will continue to filter the wastewater. If the turntable 294 continues to rotate 90 degrees at this time, both conveying pipes 292 will be connected to the storage chamber 275.

[0050] It should be noted that the opening and closing of the motion sensor 285 depends on whether the ceramic filter element 12 needs to be cleaned. If the wastewater is being treated normally, the motion sensor 285 will not be turned on. When the ceramic filter element 12 needs to be cleaned, the motion sensor 285 will be turned on. After the motion sensor 285 is running, the second servo motor 293 will drive the turntable 294 to rotate, which will block one of the conveying pipes 292, while the other conveying pipe 292 will divert the water source inside the storage chamber 275 and work with the external backwashing equipment to clean the ceramic filter element 12, so as to achieve the purpose of water recycling.

[0051] Working principle: As wastewater from the outside is input into the tank 1 through the inlet pipe 281, the wastewater pushes the baffle 283. Because the upper left side of the baffle 283 is restricted by the positioning plate 282, the baffle 283 can only rotate clockwise, causing the motion sensor 285 to start rotating as well. Subsequently, the motion sensor 285 sends a signal to the controller 286, which controls the backwashing assembly 29 to operate. Then, the first servo motor 21 above the top cover 11 is started to drive the lead screw 22 to rotate. After the lead screw 22 rotates, because the lead screw nut 23 is fitted with a movable disc 24 on the outside, and the other side of the movable disc 24 is fitted with the outside of the guide rod 26, and at the same time, multiple ceramic filter elements 12 pass through the movable disc 24, causing the scraper ring 25 below the movable disc 24 to scrape the ceramic filter elements. The filter cake and residual impurities on the outside of the 12 are removed. After the movable disc 24 moves up and down repeatedly several times, the filter cake and residual impurities will fall into the depth of the tank 1 and eventually be discharged from the tank 1 together. When the inlet pipe 281 stops conveying wastewater, the baffle 283 will reset due to the weight of the counterweight 284 below it. During this process, the controller 286 will start the second servo motor 293 to drive the turntable 294 to rotate 90 degrees counterclockwise or clockwise, so that the solid part of the turntable 294 will block the top of one of the conveying pipes 292, while the other conveying pipe 292 flows normally. At this time, the water source drawn into the storage chamber 275 is pressured by the external backwashing equipment into the normally flowing conveying pipe 292, and then conveyed to the corresponding ceramic tubes. Inside the ceramic filter element 12, it is backwashed, while the remaining ceramic filter elements 12 continue to filter the wastewater. Then, the second servo motor 293 continues to drive the turntable 294 to rotate 180 degrees in the same direction as before, so that another conveying pipe 292 is connected to the storage chamber 275, and the previously connected conveying pipe 292 will be blocked. At this time, the remaining ceramic filter elements 12 will perform a backwashing operation, and the ceramic filter elements 12 that have completed the backwashing operation will continue to filter the wastewater. If the turntable 294 continues to rotate 90 degrees, both conveying pipes 292 will be connected to the storage chamber 275. When the inlet pipe 281 does not need to convey wastewater, two of the second through holes 295 on the surface of the turntable 294 will respectively connect to two intermediate... The conveying pipe 292 above the rotating box 291 is connected, allowing the external backwashing equipment to send high-pressure liquid into the storage chamber 275, and then directly into the ceramic filter element 12 through the conveying pipe 292. As the movable disc 24 moves downward, the "L"-shaped sealing plate 272 is pulled into the first through hole 271 by the return spring 273, and seals the first through hole 271. This allows the sealing plate 272 to squeeze the water source and filter cake below the movable disc 24 during its downward movement. When the movable disc 24 moves upward, if there is water above the movable disc 24, the gravity generated by part of the water source will be applied above the sealing plate 272, causing the sealing plate 272, which is hinged inside the first through hole 271, to rotate.At this point, the area above and below the movable plate 24 will be connected, and the water source above the movable plate 24 will be discharged.

[0052] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A candle type liquid filtering device, comprising a barrel (1) and a top cover (11) arranged on the upper side of the barrel (1), the lower side of the top cover (11) is arranged in a ring array and the lower side center is provided with a ceramic filter element (12), characterized in that: The inside and outside of the barrel body (1) are provided with a impurity removal component (2) together; The impurity removal component (2) comprises a first servo motor (21) arranged on the upper side of the top cover (11), the output end of the first servo motor (21) is fixedly connected with a lead screw (22), the outer side of the lead screw (22) is threadedly connected with a lead screw nut (23), the outer side of the lead screw nut (23) is sleeved with a movable disc (24), the movable disc (24) is slidably connected in the barrel body (1), the lower side of the movable disc (24) is arranged in an annular array and the lower side center is fixedly connected with a scraping ring (25), the inside right side of the barrel body (1) is fixedly connected with a guide rod (26), the movable disc (24) is slidably sleeved on the outer side of the guide rod (26). The inside and outside of the barrel body (1) are provided with a detection assembly (28), the detection assembly (28) comprises a water inlet pipe (281) fixedly connected to the outside of the barrel body (1); The water inlet pipe (281) is connected with the barrel body (1), the inside upper side of the water inlet pipe (281) is fixedly connected with a positioning plate (282), the inside of the water inlet pipe (281) is rotatably provided with a baffle (283), the right side of the positioning plate (282) is in extrusion contact with the upper side of the left end of the baffle (283), the lower side of the baffle (283) is fixedly connected with a counterweight (284); The shape of the baffle (283) and the counterweight (284) after combination is matched with the shape of the inner wall of the water inlet pipe (281), the front and rear sides of the baffle (283) are fixedly connected with a motion sensor (285), the front of the top cover (11) is provided with a controller (286), the motion sensor (285) and the controller (286) are electrically connected with an external power supply; The inside and outside of the top cover (11) are provided with a backwashing assembly (29) together. The baffle (283) drives the motion sensor (285) to rotate in the rotating process, and transmits signals to the controller (286), and finally controls the operation of the backwashing assembly (29).

2. A candle-type liquid filter device according to claim 1, characterized in that: The inner surface of the scraping ring (25) is in sliding contact with the outer surface of the ceramic filter element (12), and the lower side of the scraping ring (25) is inversely beveled.

3. A candle-type liquid filter device according to claim 1, characterized in that: The inside of the barrel body (1) is provided with a crushing assembly (27), the crushing assembly (27) comprises a first through hole (271) penetratingly arranged on the surface of the movable disc (24).

4. A candle filter apparatus as claimed in claim 3, wherein: The inside lower side wall of the first through hole (271) is hingedly connected with a blocking plate (272), the blocking plate (272) is in "L" shape, the other side wall of the first through hole (271) and the upper side of the blocking plate (272) are fixedly connected with a return spring (273), the lower side of the movable disc (24) is fixedly connected with a limiting strip (274), the upper side of the blocking plate (272) is arranged in an inclined manner, and the lower side of the horizontal part of the blocking plate (272) is in extrusion contact with the inclined surface of the limiting strip (274) after rotation.

5. A candle-type liquid filter device according to claim 4, characterized in that: The top cover (11) has a storage cavity (275) inside. A conduit (276) is fixedly connected to the right side of the top cover (11). The conduit (276) is connected to the storage cavity (275), and the other end of the conduit (276) is connected to an external backwashing device.

6. A candle-type liquid filter device according to claim 1, characterized in that: The backwash assembly (29) includes a transfer box (291) fixedly connected to the left and right sides of the lower end inside the top cover (11).

7. A candle-type liquid filter device according to claim 6, characterized in that: The ceramic filter element (12) is divided into two groups. The transfer box (291) is connected to the ceramic filter element (12). The upper side of the transfer box (291) is fixedly connected to the conveying pipe (292). The upper side of the top cover (11) is provided with a second servo motor (293). The output end of the second servo motor (293) is fixedly connected to a turntable (294). The upper side of the turntable (294) is provided with three second through holes (295). After the turntable (294) rotates, the second through holes (295) are connected to the conveying pipe (292).

Images