Candle type liquid filtering device

Abstract

The invention 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, an impurity removal component is arranged inside and outside the barrel, the impurity removal component comprises a first servo motor arranged on the upper side of a top cover, and the output end of the first servo motor is fixedly connected with a lead screw; according to the ceramic filter element cleaning device, residues and filter cakes on the surface of a ceramic filter element are scraped in the downward moving process of the arranged scraping ring, and due to the fact that impurities left on the surface of the ceramic filter element can be removed through the scraping ring in the downward moving process of the movable disc, the ceramic filter element can be cleaned through the scraping ring, and the ceramic filter element can be cleaned through the movable disc; the problem that liquid is polluted when the liquid is filtered subsequently due to the fact that residual filter cakes breed bacteria is effectively avoided, and meanwhile, the scraping ring can treat the filter cakes on the surface of the ceramic filter element after moving up and down repeatedly, so that the service life and the cleanliness of the ceramic filter element are guaranteed.

Description

[0001] Technical Field

[0002] The present invention relates to the technical field of wastewater treatment, and more specifically, to a candle-type liquid filtration device. Background Art

[0003] The candle filter mainly consists of a cylinder body, filter elements, filter cloth, filter aid, computer control system and accessories, etc. Other auxiliary equipment includes an air compressor, a pressure sensor, etc. The materials of the cylinder body and the filter elements are mainly stainless steel, carbon steel, titanium materials and ceramics, etc. The material of the filter cloth is mainly polypropylene, polyester, polyphenylene sulfide, polytetrafluoroethylene, etc. Because of its shape similar to a candle, it is called a candle filter.

[0004] The candle filter uses the filter element as the framework and solid particles or filter aid as the filtering medium, and uses a pump to pressurize to achieve liquid clarification. The suspension to be treated will enter from the top feed port of the filter, and after being evenly distributed by the feed distributor, it will flow through the surfaces of each filter element. During filtration, the solid particles will be effectively intercepted by the filter element on the filter cloth, and these solid particles will 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 the backwashing or cleaning program to remove the old filter cake layer and start a new filtration cycle; In the prior art, during the cleaning process of the ceramic filter element through the backwashing program, the water pressure and air pressure generated by the backwashing program will strip the fixed particles remaining in the holes on the outer side of the ceramic filter element and the filter cake on the surface of the ceramic filter element. However, a small amount of the filter cake will still remain during the stripping process, and the remaining filter cake will breed bacteria, resulting in the liquid being contaminated when filtering the subsequent liquid. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a candle-type liquid filtration device.

[0006] To solve the above problems, the present invention adopts the following technical solutions, which can remove the impurities remaining on the surface of the ceramic filter element, effectively avoid the remaining filter cake from breeding bacteria, resulting in the liquid being contaminated when filtering the subsequent liquid, and ensure the service life and cleanliness of the ceramic filter element.

[0007] A candle-type liquid filtration device, including a barrel body and a top cover arranged on the upper side of the barrel body. The lower side of the top cover is arranged in a circular array and at the center of the lower side, and ceramic filter elements are provided. An impurity removal component is jointly arranged inside and outside the barrel body; The impurity removal component includes a first servo motor arranged on the upper side of the top cover. The output end of the first servo motor is fixedly connected with a lead screw. A lead screw nut is threadedly connected to the outer side of the lead screw. A movable disk is sleeved on the outer side of the lead screw nut. The movable disk is slidably connected inside the barrel. Scraper rings are fixedly connected in an annular array on the lower side and at the center of the lower side of the movable disk. A guide rod is fixedly connected to the right side inside the barrel. The movable disk is slidably sleeved on the outer side of the guide rod.

[0008] Further, the inner surface of the scraper ring is in sliding contact with the outer surface of the ceramic filter element. The lower side of the scraper ring is chamfered.

[0009] Further, a crushing component is arranged inside the barrel. The crushing component includes a first through hole penetrating through the surface of the movable disk.

[0010] Further, a blocking plate is hinged to the lower side wall inside the first through hole. The blocking plate is in an "L" shape. A return spring is fixedly connected between the other side wall inside the first through hole and the upper side of the blocking plate. A limiting strip is fixedly connected to the lower side of the movable disk. The upper side of the blocking plate is inclined. The lower side of the horizontal part of the blocking plate is in extrusion contact with the inclined surface of the limiting strip after rotation.

[0011] Further, a storage cavity is opened inside the top cover. A conduit is fixedly connected to the right side of the top cover. The conduit is communicated with the storage cavity. The other end of the conduit is communicated with an external backwashing device.

[0012] Further, a detection component is arranged both inside and outside the barrel. The detection component includes a water inlet pipe fixedly connected to the outer side of the barrel.

[0013] Further, the water inlet pipe is communicated with the barrel. A positioning plate is fixedly connected to the upper side inside the water inlet pipe. A baffle is rotated inside the water inlet pipe. The right side of the positioning plate is in extrusion contact with the upper left end of the baffle. A counterweight is fixedly connected to the lower side of the baffle.

[0014] Further, the combined shape of the baffle and the counterweight 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. A controller is arranged on the front surface of the top cover. The motion sensors and the controller are both electrically connected to an external power supply.

[0015] Further, a backwashing component is arranged both inside and outside the top cover. The backwashing component includes transfer boxes fixedly connected to the left and right sides at the lower end inside the top cover.

[0016] 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 the delivery 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, and three second through holes are opened through the upper side of the turntable. After the turntable rotates, the second through holes are connected to the delivery pipe.

[0017] Compared with the prior art, the present invention has the following beneficial effects: (1) The scraper ring provided in the present invention scrapes off the residue and filter cake on the surface of the ceramic filter element during the downward movement. Since the scraper ring can remove the impurities remaining on the surface of the ceramic filter element during the downward movement of the movable disk, it effectively avoids the breeding of bacteria on the residual filter cake, which causes the liquid to be contaminated during the subsequent filtration of the liquid. At the same time, the scraper ring can also process the filter cake on the surface of the ceramic filter element after repeated up and down movements to ensure the service life and cleanliness of the ceramic filter element.

[0018] (2) The present invention squeezes the water source and the filter cake during the downward movement of the movable disk. As the movable disk moves downward, it squeezes the water source and the filter cake inside the water source. The filter cake will be more easily discharged from the bottom of the barrel after being broken, avoiding the blockage of the upper part of the barrel by the larger volume of filter cake. At the same time, the movable disk squeezes the water source to accelerate the flow of water, thereby increasing the discharge speed of the filter cake.

[0019] (3) The present invention drives the operation sensor to rotate during the rotation process by setting a baffle, and transmits a signal to the controller, thereby finally controlling the operation of the backwash component. Since the rotation of the baffle can be used to detect whether the water inlet pipe continues to input wastewater into the barrel body for treatment, the detection result will affect whether the backwash component is running, thereby achieving the purpose of controlling the operation of the backwash component and preventing the wastewater from flowing back into the water inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic cross-sectional structural diagram of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the barrel body of the present invention when viewed from above; Figure 4 It is a schematic structural diagram of the movable disk of the present invention from a top view; Figure 5 It is a schematic cross-sectional structural diagram of the movable disk of the present invention; Figure 6 It is a schematic cross-sectional structural diagram of the top cover of the present invention; Figure 7 is a schematic cross-sectional structural diagram of the catheter of the present invention; Figure 8 Schematic cross-sectional view of the conveying pipe of the present invention as seen from below.

[0021] Description of the reference numerals in the figure: 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 plate; 25. Scraping ring; 26. Guide rod; 27. Crushing component; 271. First through hole; 272. Sealing plate; 273. Return spring; 274. Limiting strip; 275. Storage cavity; 276. Conduit; 28. Detection component; 281. Water inlet pipe; 282. Positioning plate; 283. Baffle plate; 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. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 to 8 , a candle-type liquid filtering device, including a barrel body 1 and a top cover 11 provided on the upper side of the barrel body 1. The lower side of the top cover 11 is arranged in a circular array and a ceramic filter element 12 is provided at the center of the lower side. An impurity removal component 2 is commonly provided inside and outside the barrel body 1; The impurity removal component 2 includes a first servo motor 21 provided on the upper side of the top cover 11. The output end of the first servo motor 21 is fixedly connected to a lead screw 22. The outer side of the lead screw 22 is threadedly connected to a lead screw nut 23. The outer side of the lead screw nut 23 is sleeved with a movable plate 24. The movable plate 24 is slidably connected inside the barrel body 1. The lower side of the movable plate 24 is arranged in a circular array and a scraping ring 25 is fixedly connected at the center of the lower side. The right side inside the barrel body 1 is fixedly connected to a guide rod 26. The movable plate 24 is slidably sleeved on the outer side of the guide rod 26.

[0024] 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 chamfered.

[0025] By adopting the above technical solution, during the operation of the external backwashing device, 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, the lead screw nut 23 on its outer side will start to move according to the outer thread direction of the lead screw 22. Since the outer side of the lead screw nut 23 is sleeved with a movable disk 24, and the other side of the movable disk 24 is sleeved on the outer side of the guide rod 26, when the lead screw nut 23 drives the movable disk 24 to move downward, the movable disk 24 will also slide downward on the outer side of the guide rod 26. At the same time, multiple ceramic filter elements 12 penetrate through the movable disk 24, so that the movable disk 24 can freely slide on the outer side of the ceramic filter elements 12. And the scraping ring 25 arranged below the movable disk 24 and wrapping the outer surface of the ceramic filter elements 12 will also slide on the outer side of the ceramic filter elements 12. After the external backwashing device removes the filter cake on the surface of the ceramic filter elements 12, the downward moving scraping ring 25 will further clean the impurities remaining on the surface of the ceramic filter elements 12. If the external backwashing device is not started, the scraper can also directly clean the filter cake on the surface of the ceramic filter elements 12. After the movable disk 24 moves up and down repeatedly for several times, the filter cake and the remaining impurities will fall into the deep part of the barrel body 1 and are finally discharged from the barrel body 1 together. Since the impurities remaining on the surface of the ceramic filter elements 12 can be removed by the scraping ring 25 when the movable disk 24 moves downward, it effectively avoids the growth of bacteria caused by the remaining filter cake, which may cause the liquid to be contaminated when filtering the subsequent liquid. At the same time, the scraping ring 25 can also process the filter cake on the surface of the ceramic filter elements 12 after moving up and down repeatedly to ensure the service life and cleanliness of the ceramic filter elements 12.

[0026] As Figures 2 to 5 shown, a crushing assembly 27 is provided inside the barrel body 1, and the crushing assembly 27 includes a first through hole 271 penetrating through the surface of the movable disk 24.

[0027] A blocking plate 272 is hinged to the lower side wall inside the first through hole 271. The blocking plate 272 is in an "L" shape. A return spring 273 is fixedly connected between the other side wall inside the first through hole 271 and the upper side of the blocking plate 272. A limiting strip 274 is fixedly connected to the lower side of the movable disk 24. The upper side of the blocking plate 272 is inclined, and the lower side of the horizontal part of the blocking plate 272 is in pressing contact with the inclined surface of the limiting strip 274 after rotation.

[0028] A storage cavity 275 is opened inside the top cover 11. A conduit 276 is fixedly connected to the right side of the top cover 11. The conduit 276 is communicated with the storage cavity 275, and the other end of the conduit 276 is communicated with the external backwashing device.

[0029] By adopting the above technical solution, as the external backwashing device injects high-pressure liquid into the storage chamber 275, and then the high-pressure liquid enters the interior of the ceramic filter element 12. At this time, the pressure generated by the high-pressure liquid will scour 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 from the surface of the ceramic filter element 12. At the same time, as the movable disk 24 moves downward, the "L"-shaped plugging plate 272 is pulled by the reset spring 273 and completely enters the first through hole 271 to plug the first through hole 271. During the downward movement of the movable disk 24, the water source and the filter cake below the movable disk 24 can be squeezed by means of the plugging plate 272. When the movable disk 24 moves upward, if there is a water source above the movable disk 24, the gravity generated by part of the water source will be applied above the plugging plate 272, causing the plugging plate 272 hinged inside the first through hole 271 to rotate. At this time, the upper and lower parts of the movable disk 24 will be connected, and the water source above the movable disk 24 will be discharged. Since during the downward movement of the movable disk 24, the movable disk 24 will squeeze the water source and the filter cake inside the water source, and the filter cake will be easier to discharge from below the barrel body 1 after being broken, avoiding blockage of the upper part of the barrel body 1 by a larger volume of filter cake. At the same time, the movable disk 24 squeezing the water source can accelerate the water flow, improving the discharge speed of the filter cake.

[0030] As Figure 2 and Figure 8 shown, a detection assembly 28 is provided both inside and outside the barrel body 1. The detection assembly 28 includes a water inlet pipe 281 fixedly connected to the outside of the barrel body 1.

[0031] The water inlet pipe 281 is communicated with the barrel body 1. A positioning plate 282 is fixedly connected to the upper side inside the water inlet pipe 281. A baffle plate 283 is rotatably arranged inside the water inlet pipe 281. The right side of the positioning plate 2{82} is in pressing contact with the upper left end of the baffle plate 283. A counterweight 284 is fixedly connected to the lower side of the baffle plate 283.

[0032] The combined shape of the baffle plate 283 and the counterweight 284 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 plate 283. A controller 286 is arranged on the front surface of the top cover 11. Both the motion sensors 285 and the controller 286 are electrically connected to an external power source.

[0033] A backwashing assembly 29 is provided both inside and outside the top cover 11.

[0034] By adopting the above technical solution, as the waste water from the outside is input into the barrel body 1 through the water inlet pipe 281, the waste water entering the inside of the water inlet pipe 281 will push the baffle plate 283. Since the upper left part of the baffle plate 283 is restricted by the positioning plate 282, the baffle plate 283 will only rotate clockwise. While the baffle plate 283 rotates, the motion sensor 285 on its outer side will also start to rotate. Subsequently, the motion sensor 285 sends a signal to the controller 286, and controls the operation of the backwashing assembly 29 through the controller 286. When the water inlet pipe 281 stops transporting the waste water, the baffle plate 283 will reset due to the weight of the counterweight 284 below it and block the water inlet pipe 281. Since the rotation of the baffle plate 283 can be used to detect whether the water inlet pipe 281 continues to input the waste water into the barrel body 1 for treatment, and the detection result will affect whether the backwashing assembly 29 operates, thus achieving the purpose of controlling the operation of the backwashing assembly 29, and at the same time preventing the waste water from flowing back into the water inlet pipe 281.

[0035] As Figure 6 and Figure 7 shown, the backwashing assembly 29 includes transfer boxes 291 fixedly connected to the left and right sides of the lower end inside the top cover 11.

[0036] The ceramic filter element 12 is divided into two groups. The transfer box 291 is communicated with the ceramic filter element 12. A delivery pipe 292 is fixedly connected to the upper side of the transfer box 291. A second servo motor 293 is arranged on the upper side of the top cover 11. The output end of the second servo motor 293 is fixedly connected to a turntable 294. Three second through holes 295 are formed through the upper side of the turntable 294. After the turntable 294 rotates, the second through holes 295 are communicated with the delivery pipe 292.

[0037] By adopting the above technical solution, when the water 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 respectively communicated with the conveying pipes 292 above the two transfer boxes 291. After the external backwashing device sends high-pressure liquid into the storage cavity 275, it can 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 counterclockwise or clockwise by 90 degrees, so that the solid part of the turntable 294 will block the upper part of one of the conveying pipes 292, while the other conveying pipe 292 is in normal circulation. At this time, the water source pumped into the storage cavity 275 enters the normally circulating conveying pipe 292 under the pressure provided by the external backwashing device, and then is conveyed to several corresponding ceramic filter elements 12 for backwashing, while the other several 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 previous rotation direction, so that the other conveying pipe 292 is communicated with the storage cavity 275, and the originally communicated conveying pipe 292 will be blocked. At this time, the other several ceramic filter elements 12 will perform backwashing operations, while the ceramic filter elements 12 that have completed the backwashing operations 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 cavity 275; 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 processed normally, the motion sensor 285 is not turned on. When the ceramic filter element 12 needs to be cleaned, the motion sensor 285 is turned on. Since the second servo motor 293 will drive the turntable 294 to rotate after the motion sensor 285 operates, one of the conveying pipes 292 is blocked, while the other conveying pipe 292 drains the water source inside the storage cavity 275 and cooperates with the external backwashing device to clean the ceramic filter element 12 to achieve the purpose of recycling the water source.

[0038] Working principle: As the waste water from the outside is input into the barrel body 1 through the water inlet pipe 281, the waste water will push the baffle plate 283. Since the upper left part of the baffle plate 283 is restricted by the positioning plate 282, the baffle plate 283 will only rotate clockwise, causing the motion sensor 285 to also start rotating. Subsequently, the motion sensor 285 sends a signal to the controller 286, and the controller 286 controls the operation of the backwashing assembly 29. 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, since the outer side of the lead screw nut 23 is sleeved with a movable disk 24, and the other side of the movable disk 24 is sleeved on the outer side of the guide rod 26. At the same time, multiple ceramic filter elements 12 penetrate through the movable disk 24, so that the scraping ring 25 below the movable disk 24 removes the filter cake and residual impurities on the outer side of the ceramic filter element 12. After the movable disk 24 moves up and down repeatedly for several times, the filter cake and residual impurities will fall into the deep part of the barrel body 1 and are finally discharged from the barrel body 1 together. When the water inlet pipe 281 stops transporting the waste water, the baffle plate 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 upper part of one of the delivery pipes 292, while the other delivery pipe 292 will flow normally. At this time, the water source pumped into the storage cavity 275 is pressured by the external backwashing equipment and enters the normally flowing delivery pipe 292, and then is transported to the corresponding several ceramic filter elements 12 for backwashing, while the other several ceramic filter elements 12 will continue to filter the waste water. Then, the second servo motor 293 continues to drive the turntable 294 to rotate 180 degrees in the previous rotation direction, so that the other delivery pipe 292 is connected to the storage cavity 275, while the originally connected delivery pipe 292 will be blocked. At this time, the other several ceramic filter elements 12 will perform the backwashing operation, while the ceramic filter elements 12 that have completed the backwashing operation will continue to filter the waste water. If the turntable 294 continues to rotate 90 degrees at this time, both delivery pipes 292 will be connected to the storage cavity 275. When the water inlet pipe 281 does not need to transport the waste water, two of the second through holes 295 on the surface of the turntable 294 will be respectively connected to the delivery pipes 292 above the two transfer boxes 291, so that after the external backwashing equipment sends the high-pressure liquid into the storage cavity 275, it can directly enter the ceramic filter element 12 through the delivery pipe 292. As the movable disk 24 moves downward, the "L"-shaped blocking plate 272 is completely pulled into the first through hole 271 by the reset spring 273 and blocks the first through hole 271, so that the movable disk 24 can squeeze the water source and filter cake under the movable disk 24 with the help of the blocking plate 272 during the downward movement. When the movable disk 24 moves upward, if there is water source above the movable disk 24, the gravity generated by part of the water source will be applied above the blocking plate 272, causing the blocking plate 272 hinged inside the first through hole 271 to rotate.At this time, the upper and lower parts above the movable disk 24 will be connected, and the water source above the movable disk 24 will be discharged.

[0039] As described above, it is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the technical field, within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A candle-type liquid filtration device, comprising a barrel body (1) and a top cover (11) provided on the upper side of the barrel body (1). The lower side of the top cover (11) is arranged in an annular array and a ceramic filter element (12) is provided at the center of the lower side. It is characterized in that: The inside and outside of the barrel body (1) are jointly provided with an impurity removal component (2); The impurity removal component (2) includes 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). A lead screw nut (23) is threadedly connected to the outside of the lead screw (22). A movable disk (24) is sleeved on the outside of the lead screw nut (23). The movable disk (24) is slidably connected inside the barrel body (1). The lower side of the movable disk (24) is fixedly connected with scraping rings (25) in an annular array arrangement and at the center of the lower side. A guide rod (26) is fixedly connected to the right side inside the barrel body (1). The movable disk (24) is slidably sleeved on the outside of the guide rod (26).

2. The candle-type liquid filtering 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). The lower side of the scraping ring (25) is chamfered.

3. The candle-type liquid filtering device according to claim 1, characterized in that: A crushing component (27) is arranged inside the barrel body (1). The crushing component (27) includes a first through hole (271) penetrating through the surface of the movable disk (24).

4. The candle-type liquid filtering device according to claim 3, characterized in that: A blocking plate (272) is hinged to the lower side wall inside the first through hole (271). The blocking plate (272) is in an "L" shape. A return spring (273) is fixedly connected between the other side wall inside the first through hole (271) and the upper side of the blocking plate (272). A limiting strip (274) is fixedly connected to the lower side of the movable disk (24). The upper side of the blocking plate (272) is inclined. 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. The candle-type liquid filtering device according to claim 4, wherein: A storage cavity (275) is opened inside the top cover (11). A conduit (276) is fixedly connected to the right side of the top cover (11). The conduit (276) is communicated with the storage cavity (275). The other end of the conduit (276) is communicated with an external backwashing device.

6. The candle-type liquid filtering device according to claim 1, wherein: The inside and outside of the barrel body (1) are jointly provided with a detection component (28). The detection component (28) includes a water inlet pipe (281) fixedly connected to the outside of the barrel body (1).

7. The candle type liquid filtering device according to claim 6, characterized in that: The water inlet pipe (281) is communicated with the barrel body (1). A positioning plate (282) is fixedly connected to the upper side inside the water inlet pipe (281). A baffle plate (283) is rotated inside the water inlet pipe (281). The right side of the positioning plate (282) is in extrusion contact with the upper side of the left end of the baffle plate (283). A counterweight block (284) is fixedly connected to the lower side of the baffle plate (283).

8. The candle-type liquid filtering device according to claim 7, wherein: The combined shape of the baffle plate (283) and the counterweight block (284) 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 plate (283). A controller (286) is arranged on the front surface of the top cover (11). The motion sensors (285) and the controller (286) are both electrically connected to an external power supply.

9. The candle-type liquid filtration device according to claim 1, characterized in that: The inside and outside of the top cover (11) are jointly provided with a backwashing component (29). The backwashing component (29) includes transfer boxes (291) fixedly connected to the left and right sides of the lower end inside the top cover (11).

10. A candle type liquid filtering device according to claim 9, characterized in that: The ceramic filter element (12) is divided into two groups. The transfer box (291) is communicated with the ceramic filter element (12). A delivery pipe (292) is fixedly connected to the upper side of the transfer box (291). A second servo motor (293) is arranged on the upper side of the top cover (11). The output end of the second servo motor (293) is fixedly connected to a turntable (294). Three second through holes (295) are formed through the upper side of the turntable (294). After the turntable (294) rotates, the second through holes (295) are communicated with the delivery pipe (292).

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