Backwashing multi-stage composite constant-temperature filter

Abstract

The utility model discloses a backwashing multistage composite constant-temperature filter which comprises trundles, the trundles are symmetrically arranged on a main water tank, a washing support is fixedly connected to the main water tank, a washing motor is fixedly connected to the washing support, the output end of the washing motor is fixedly connected to a washing water pump, and the washing water pump is fixedly connected to the washing support; according to the utility model, after primary filtration by the magnet filter, large-particle impurities are secondarily filtered by the water tank filter screen, and third-stage fine filtration is carried out by the filter element, so that the purity of the cutting fluid is improved, and the temperature can be constant in a set temperature range under the action of the coil immersion type water cooling machine; the water cooling machine coil pipe can make the grinding liquid reach the set temperature more quickly, the filtering precision is high, and constant-temperature control over the grinding liquid can be achieved; the smudginess condition of the filter element is automatically monitored through the pressure gauge, and the filter element can be automatically and efficiently cleaned, so that the operation stability of the equipment is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a backwashing multi-stage composite constant temperature filter. Background Technology

[0002] Grinding slurry is an industrial liquid mainly used for grinding workpieces to improve surface finish and reduce surface roughness. The grinding slurry tank is a container in grinding equipment used to store and circulate the grinding slurry. It is used to filter and purify the recovered grinding slurry for reuse. However, existing grinding slurry tanks have shortcomings. First, for parts with very high machining precision requirements, such as a diameter tolerance of 1 micrometer, roundness of 1 micrometer, and surface roughness Ra0.1, conventionally configured grinding slurry tanks only have a natural sedimentation or filtration function, lacking temperature control and high-precision filtration. Such tanks cannot meet the machining precision requirements. Second, existing grinding slurry tanks cannot monitor the dirt levels of internal filtration components or perform automatic and efficient cleaning, affecting the operational stability of the equipment. Therefore, designing a backwashing multi-stage composite temperature-controlled filter is essential. Summary of the Invention

[0003] The purpose of this invention is to provide a backwashing multi-stage composite constant temperature filter to solve the problem that existing grinding fluid tanks have only a natural sedimentation function and no constant temperature function or high-precision filtration. For parts with very high processing precision requirements, such as a diameter tolerance of 1 micrometer, a roundness of 1 micrometer, and a surface roughness of Ra0.1, conventional grinding fluid tanks cannot meet the processing precision requirements, nor can they monitor the dirt status of the internal filtration components or perform automatic and efficient cleaning, thus affecting the operational stability of the equipment.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a backwashing multi-stage composite constant temperature filter, including casters symmetrically arranged on a main water tank. A flushing bracket is fixedly connected to the main water tank, and a flushing motor is fixedly connected to the flushing bracket. The output end of the flushing motor is fixedly connected to a flushing water pump, which is fixedly connected to the flushing bracket. A flushing / pumping inlet pipe is fixedly connected to the flushing water pump, and a sewage suction pipe is fixedly connected to the flushing / pumping inlet pipe. A sewage suction end angle seat valve is fixedly connected to the sewage suction pipe. A clean water suction pipe is fixedly connected to the water inlet pipe, and a clean water suction end angle seat valve is fixedly connected to the clean water suction pipe. A flushing / pumping outlet pipe is fixedly connected to the flushing water pump. The flushing water pump is fixedly connected to the main water tank. The main water tank is fixedly connected to the clean water tank. A clean water outlet pump is fixedly connected to the clean water tank. A water tank handle is fixedly connected to the clean water tank. An electrical control mounting bracket is fixedly connected to one side of the clean water tank. An electrical control box is fixedly connected to the electrical control mounting bracket. A pressure controller is fixedly connected to the electrical control box. An air source treatment component is fixedly connected to the electrical control box.

[0005] As a further technical solution of this utility model, a coil-type immersion water chiller is fixedly connected to the water tank clean water tank, a water chiller coil is fixedly connected to the coil-type immersion water chiller, a filter bucket is fixedly connected to the water tank clean water tank, a filter overflow pipe is fixedly connected to the filter overflow pipe, a flushing / overflow conversion joint is fixedly connected to the flushing / overflow conversion joint, an overflow angle seat valve is fixedly connected to the flushing / overflow conversion joint, a backwash angle seat valve is fixedly connected to the flushing / overflow conversion joint, the backwash angle seat valve is fixedly connected to the filter overflow pipe, a backwash air inlet pipe is fixedly connected to the backwash angle seat valve, one end of the backwash main pipe is fixedly connected to the backwash / filter conversion joint of the main sewage pipe, the backwash / filter conversion joint of the main sewage pipe is fixedly connected to the main sewage pipe, and one end of the main sewage pipe is fixedly connected to the flushing / pumping outlet pipe.

[0006] As a further technical solution of this utility model, the other end of the sewage main pipe is fixedly connected to a sewage main water pipe filter inlet pipe, a sewage main water pipe angle seat valve is fixedly connected to the sewage main water pipe filter inlet pipe, the sewage main water pipe filter inlet pipe is fixedly connected to the filter barrel, and a pressure gauge is fixedly connected to the filter barrel.

[0007] As a further technical solution of this utility model, a filter drain main water pipe is fixedly connected to the filter barrel, a backwash drain angle valve is fixedly connected to the filter drain main water pipe, a flush drain angle valve is fixedly connected to the filter drain main water pipe, and a flush drain port is fixedly connected to the flush drain angle valve.

[0008] As a further technical solution of this utility model, a float switch is provided in the water tank purification tank, a sewage sedimentation tank is attached to one side of the water tank purification tank, a sewage tank overflow pipe is fixedly connected to the sewage sedimentation tank, a purification tank overflow port is opened on the water tank purification tank, a water tank filter screen is fixedly connected to the water tank purification tank, the water tank filter screen is fixedly connected to the main water tank, a magnetic filter is fixedly connected to the main water tank, and a sewage main water pipe interface is fixedly connected to the magnetic filter.

[0009] As a further technical solution of this utility model, a filter bucket cover is fixedly connected to the filter bucket, a filter element locking nut is fixedly connected to the filter bucket cover, a filter element fixing plate is fixedly connected to the filter element locking nut, and the filter element fixing plate is tightly attached to the filter bucket cover.

[0010] As a further technical solution of this utility model, a filter element is fixedly connected to the filter element fixing plate, the filter element is fixedly connected to the bottom shell of the filter barrel, and the bottom shell of the filter barrel is fixedly connected to the filter barrel support.

[0011] This utility model provides a backwashing multi-stage composite constant temperature filter, the advantages of which are as follows: By starting the magnetic filter, the machine's drain pipe is connected to the main sewage pipe interface on the magnetic filter. The grinding liquid, after the first stage of filtration by the magnetic filter, flows to the water tank filter screen for the second stage of filtration. The grinding liquid then flows to the sewage tank of the main water tank. Simultaneously, pressing the corresponding button on the electrical control box that controls the start of the flushing motor activates the flushing motor, driving the flushing water pump. The flushing water pump pumps the second-stage filtered grinding liquid through the sewage suction pipe to the main sewage pipe. The grinding liquid flows to the angle seat valve on the main sewage pipe and enters the filter tank, undergoing the third stage of filtration through the filter element. The grinding liquid is purified to a state suitable for use and then flows through the filter overflow pipe to... The water tank contains a purification tank where the grinding fluid, after undergoing three stages of filtration, is kept at a constant temperature within the set range by an immersion water chiller. The chiller coils allow the grinding fluid to reach the set temperature more quickly. The temperature-controlled grinding fluid is then pumped to the processing location via a purified water pump. The filtered grinding fluid has a precision of 5 microns, and this process is repeated. When the grinding fluid level in the purification tank exceeds the float switch's set range, the flushing pump stops operating, and the overflowing water flows through the purification tank's overflow outlet into the main water tank's wastewater tank. Once the water level in the purification tank drops, the flushing pump restarts, repeating the above process. After primary filtration by a magnetic filter, large particles are filtered a second time by the water tank's filter screen before further filtration. The filter element performs a third-stage fine filtration to improve the purity of the cutting fluid. Through the action of the coil-immersion water chiller, the temperature can be kept constant within the set range. The water chiller coil allows the grinding fluid to reach the set temperature more quickly, resulting in high filtration accuracy and constant temperature control of the grinding fluid. When the filter element in the filter canister filters too many impurities, it will cause excessive pressure inside the filter canister, which can be detected by a pressure gauge. The pressure alarm will also activate, reminding you to backwash and clean the filter element. Backwashing and cleaning of the filter element is performed using both pneumatic and water media. Upon receiving the alarm, the sewage suction valve and the sewage main pipe valve will close, while the clean water suction valve will activate. Clean water will be introduced through the clean water suction pipe and then pumped out by the flushing pump. Clean water is led to the top of the filter tank through the sewage main and backwash main, and then enters the filter tank through the water inlet on the filter tank cover. During this process, compressed air is used to process the air source and then fill the filter tank through the backwash air inlet pipe. The pressurized clean water is used to clean the filter element. Sewage and particulate impurities are discharged from the filter drain main pipe on the bottom shell of the filter tank to the sewage sedimentation tank. After sedimentation in the sewage sedimentation tank, the clean water is led back to the main water tank through the sewage overflow pipe. The cleaning is completed. The above steps are repeated. The backwashing multi-stage composite constant temperature filter can be used normally. It can automatically monitor the dirt status of the filter element and automatically and efficiently clean the filter element, ensuring the stability of the equipment operation. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram showing the position of the pressure gauge in this utility model;

[0015] Figure 3 This is a schematic diagram showing the position of the water-cooled machine coil in this utility model;

[0016] Figure 4 This is a schematic diagram showing the position of the filter element locking nut in this utility model;

[0017] Figure 5 This is a schematic diagram showing the position of the filter bucket support in this utility model.

[0018] In the diagram: 1. Casters; 2. Main water tank; 3. Sewage main water pipe backwash / filter adapter; 4. Flushing motor; 5. Flushing bracket; 6. Flushing water pump; 7. Flushing / pumping inlet pipe; 8. Flushing / pumping outlet pipe; 9. Clean water outlet pump; 10. Pressure controller; 11. Electrical control box; 12. Coil-type immersion water chiller; 13. Backwash angle seat valve; 14. Flushing / overflow adapter; 15. Overflow angle seat valve; 16. Pressure gauge; 17. Backwash drain angle seat valve; 18. Flushing drain angle valve; 19. Flushing drain port; 20. Sewage sedimentation tank; 21. Sewage tank overflow pipe; 22. Tank filter screen; 23. Magnetic filter; 24. Backwash air inlet pipe; 25. 26. Sewage main water pipe angle seat valve; 27. Water tank / clean water tank; 28. Sewage main water pipe filter inlet pipe; 29. ​​Sewage main water pipe interface; 30. Clean water tank overflow outlet; 31. Sewage main pipe; 32. Backwash main pipe; 33. Sewage suction end angle seat valve; 34. Sewage suction pipe; 35. Clean water suction pipe; 36. Clean water suction end angle seat valve; 37. Water tank handle; 38. Filter barrel; 39. Filter sewage discharge main water pipe; 40. Filter overflow pipe; 41. Water chiller coil; 42. Float switch; 43. Electrical control mounting bracket; 44. Air source treatment component; 45. Filter element locking nut; 46. Filter element fixing plate; 47. Filter element; 48. Filter barrel cover; 49. Filter barrel bottom shell; 40. Filter barrel support. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Please see the appendix Figure 1 -Appendix Figure 5This utility model provides an embodiment of a backwashing multi-stage composite constant temperature filter, including casters 1 symmetrically arranged on a main water tank 2. A flushing bracket 5 is fixedly connected to the main water tank 2, and a flushing motor 4 is fixedly connected to the flushing bracket 5. The output end of the flushing motor 4 is fixedly connected to a flushing water pump 6, which is fixedly connected to the flushing bracket 5. A flushing / pumping inlet pipe 7 is fixedly connected to the flushing / pumping inlet pipe 7, and a sewage suction pipe 33 is fixedly connected to the sewage suction pipe 33. A sewage suction end angle seat valve 32 is fixedly connected to the sewage suction pipe 33, a clean water suction pipe 34 is fixedly connected to the flushing / pumping inlet pipe 7, and a clean water suction end angle seat valve 35 is fixedly connected to the clean water suction pipe 34. A flushing water pump 6 is fixedly connected to... A flushing / pumping water outlet pipe 8 and a flushing water pump 6 are fixedly connected to the main water tank 2. The main water tank 2 is fixedly connected to the water tank clean water tank 26. A clean water outlet pump 9 is fixedly connected to the water tank clean water tank 26. A water tank handle 36 is fixedly connected to the water tank clean water tank 26. An electrical control mounting bracket 42 is fixedly connected to one side of the water tank clean water tank 26. An electrical control box 11 is fixedly connected to the electrical control mounting bracket 42. A pressure controller 10 is fixedly connected to the electrical control box 11. An air source treatment component 43 is fixedly connected to the electrical control box 11. A coil immersion water chiller 12 is fixedly connected to the water tank clean water tank 26. A water chiller coil 40 is fixedly connected to the coil immersion water chiller 12. A filter canister 37 is fixedly connected to the water tank clean water tank 26. A filter overflow is fixedly connected to the filter canister 37. A flushing / overflow conversion connector 14 is fixedly connected to the overflow pipe 39 and the filter overflow pipe 39. An overflow angle seat valve 15 is fixedly connected to the flushing / overflow conversion connector 14. A backwash angle seat valve 13 is fixedly connected to the flushing / overflow conversion connector 14. The backwash angle seat valve 13 is fixedly connected to the filter overflow pipe 39. A backwash air inlet pipe 24 is fixedly connected to the backwash angle seat valve 13. One end of the backwash main pipe 31 is fixedly connected to the backwash main pipe 31. The other end of the backwash main pipe 31 is fixedly connected to the sewage main pipe backwash / filter conversion connector 3. The sewage main pipe backwash / filter conversion connector 3 is fixedly connected to the sewage main pipe 30. One end of the sewage main pipe 30 is fixedly connected to the flushing / pumping outlet pipe 8. The other end of the sewage main pipe 30 is fixedly connected to... A main sewage pipe filter inlet pipe 27 is connected to the main sewage pipe filter inlet pipe 27. A main sewage pipe angle seat valve 25 is fixedly connected to the main sewage pipe filter inlet pipe 27. The main sewage pipe filter inlet pipe 27 is fixedly connected to the filter tank 37. A pressure gauge 16 is fixedly connected to the filter tank 37. A filter discharge main water pipe 38 is fixedly connected to the filter discharge main water pipe 38. A backwash discharge angle seat valve 17 is fixedly connected to the filter discharge main water pipe 38. A flush discharge angle valve 18 is fixedly connected to the flush discharge angle valve 18. A flush discharge port 19 is fixedly connected to the flushing discharge angle valve 18. A float switch 41 is installed in the water tank clean water tank 26. A sewage sedimentation tank 20 is attached to one side of the water tank clean water tank 26. A sewage tank overflow pipe 21 is fixedly connected to the sewage sedimentation tank 20.The water tank 26 has an overflow outlet 29. A water tank filter 22 is fixedly connected to the water tank 26 and is fixedly connected to the main water tank 2. A magnetic filter 23 is fixedly connected to the main water tank 2, and a sewage main water pipe interface 28 is fixedly connected to the magnetic filter 23. A filter bucket cover 47 is fixedly connected to the filter bucket cover 47, and a filter element locking nut 44 is fixedly connected to the filter element locking nut 44. A filter element fixing plate 45 is fixedly connected to the filter bucket cover 47, and a filter element 46 is fixedly connected to the filter element fixing plate 45. The filter element 46 is fixedly connected to the bottom shell 48 of the filter bucket and is used to filter the grinding liquid. The bottom shell 48 of the filter bucket is fixedly connected to the filter bucket support 49, which provides support for the bottom shell 48.

[0022] Specifically, in use, first start the magnetic filter 23. Connect the machine's drain pipe to the main wastewater pipe interface 28 on the magnetic filter 23. The grinding liquid, after the first stage of filtration by the magnetic filter 23, flows to the water tank filter screen 22 for the second stage of filtration. The grinding liquid then flows to the wastewater tank of the main water tank 2. At the same time, press the corresponding button on the electrical control box 11 that controls the start of the flushing motor 4. The flushing motor 4 starts and drives the flushing water pump 6 to work. The flushing water pump 6 pumps the second-stage filtered grinding liquid through the wastewater suction pipe 33 to... The wastewater main pipe 30 carries the grinding liquid to the main wastewater pipe angle seat valve 25, where it enters the filter tank 37. After passing through the filter element 46, it undergoes third-stage filtration, purifying the grinding liquid to a usable state. The grinding liquid then flows through the filter overflow pipe 39 to the water tank clean water tank 26. In the water tank clean water tank 26, the grinding liquid, having undergone three stages of filtration, is kept at a constant temperature within the set range by the immersion water chiller 12. The water chiller coil 40 allows the grinding liquid to reach the set temperature more quickly. The temperature-controlled grinding liquid is then pumped out by the clean water outlet pump 9. The grinding slurry is injected into the processing position, and the qualified grinding slurry has a precision of 5 microns. This process is repeated. When the depth of the grinding slurry in the water tank 26 exceeds the set range of the float switch 41, the flushing water pump 6 will stop working. The overflowing water will flow through the overflow port 29 of the water tank into the sewage tank of the main water tank 2. When the water level in the water tank 26 drops, the flushing water pump 6 will start working again, repeating the above process. After primary filtration by the magnetic filter 23, large particles are filtered by the water tank filter screen 22, and then filtered again. The filter element 46 performs a third-stage fine filtration to improve the purity of the cutting fluid. Through the action of the coil immersion water chiller 12, the temperature can be kept constant within the set temperature range. The water chiller coil 40 can make the grinding fluid reach the set temperature more quickly. It has high filtration accuracy and can achieve constant temperature control of the grinding fluid. When the filter element 46 in the filter canister 37 filters too many impurities, it will cause the pressure inside the filter canister 37 to be too high. This can be detected by the pressure gauge 16. The pressure alarm will also be activated to remind that the filter element 46 needs to be backwashed and cleaned.The filter element 46 is backwashed using both pneumatic and water media. Upon receiving an alarm, the sewage suction valve 32 and the main sewage pipe angle valve 25 close, while the clean water suction valve 35 activates. Clean water is introduced through the clean water suction pipe 34 and pumped by the flushing pump 6 through the sewage main pipe 30 and backwash main pipe 31 to the top of the filter tank 37. The clean water then enters the filter tank 37 through the water inlet on the filter tank cover 47. During this process, compressed air is used to process the air source treatment unit 43 and then enters the filter tank through the backwash air inlet pipe 24. The filter cartridge 46 is cleaned by filling the filter tank 37 with pressurized clean water. Wastewater and particulate impurities are discharged from the main wastewater pipe 38 on the bottom shell 48 of the filter tank to the wastewater sedimentation tank 20. After sedimentation in the wastewater sedimentation tank 20, clean water is returned to the main water tank 2 via the wastewater overflow pipe 21. The cleaning process is then completed. Repeating the above steps allows the multi-stage composite constant temperature filter to operate normally. It can automatically monitor the dirt level of the filter cartridge 46 and perform automatic and efficient cleaning of the filter cartridge 46, ensuring the stable operation of the equipment.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A backwashing multi-stage composite constant temperature filter, comprising casters (1), characterized in that: The casters (1) are symmetrically arranged on the main water tank (2). A flushing bracket (5) is fixedly connected to the main water tank (2). A flushing motor (4) is fixedly connected to the flushing bracket (5). The output end of the flushing motor (4) is fixedly connected to the flushing water pump (6). The flushing water pump (6) is fixedly connected to the flushing bracket (5). A flushing / pumping inlet pipe (7) is fixedly connected to the flushing water pump (6). A sewage suction pipe (33) is fixedly connected to the flushing / pumping inlet pipe (7). A sewage suction end angle seat valve (32) is fixedly connected to the sewage suction pipe (33). A clean water suction pipe (34) is fixedly connected to the flushing / pumping inlet pipe (7). A clean water suction pipe (34) is fixedly connected to the clean water suction pipe (34). There is a water inlet valve (35), a flushing / pumping outlet pipe (8) is fixedly connected to the flushing water pump (6), the flushing water pump (6) is fixedly connected to the main water tank (2), the main water tank (2) is fixedly connected to the water tank clean water tank (26), a water tank outlet pump (9) is fixedly connected to the water tank clean water tank (26), a water tank handle (36) is fixedly connected to the water tank clean water tank (26), an electrical control mounting bracket (42) is fixedly connected to one side of the water tank clean water tank (26), an electrical control box (11) is fixedly connected to the electrical control mounting bracket (42), a pressure controller (10) is fixedly connected to the electrical control box (11), and an air source treatment component (43) is fixedly connected to the electrical control box (11).

2. The backwashing multi-stage composite constant temperature filter according to claim 1, characterized in that: A coil-type immersion water chiller (12) is fixedly connected to the water tank (26), and a water chiller coil (40) is fixedly connected to the coil-type immersion water chiller (12). A filter tank (37) is fixedly connected to the water tank (26), and a filter overflow pipe (39) is fixedly connected to the filter tank (37). A flushing / overflow conversion connector (14) is fixedly connected to the filter overflow pipe (39), and an overflow angle seat valve (15) is fixedly connected to the flushing / overflow conversion connector (14). A backwash angle seat valve is fixedly connected to the flushing / overflow conversion connector (14). (13) The backwash angle seat valve (13) is fixedly connected to the filter overflow pipe (39). The backwash angle seat valve (13) is fixedly connected to the backwash air inlet pipe (24). The backwash angle seat valve (13) is fixedly connected to one end of the backwash main pipe (31). The other end of the backwash main pipe (31) is fixedly connected to the sewage main pipe backwash / filter adapter (3). The sewage main pipe backwash / filter adapter (3) is fixedly connected to the sewage main pipe (30). One end of the sewage main pipe (30) is fixedly connected to the flushing / pumping outlet pipe (8).

3. The backwashing multi-stage composite constant temperature filter according to claim 2, characterized in that: The other end of the main sewage pipe (30) is fixedly connected to the main sewage pipe filter inlet pipe (27), the main sewage pipe filter inlet pipe (27) is fixedly connected to the main sewage pipe angle seat valve (25), the main sewage pipe filter inlet pipe (27) is fixedly connected to the filter bucket (37), and the filter bucket (37) is fixedly connected to the pressure gauge (16).

4. The backwashing multi-stage composite constant temperature filter according to claim 3, characterized in that: The filter barrel (37) is fixedly connected to a filter drain main water pipe (38), the filter drain main water pipe (38) is fixedly connected to a backwash drain angle valve (17), the filter drain main water pipe (38) is fixedly connected to a flush drain angle valve (18), and the flush drain angle valve (18) is fixedly connected to a flush drain port (19).

5. A backwashing multi-stage composite constant temperature filter according to claim 1, characterized in that: A float switch (41) is provided in the water tank purification tank (26). A sewage sedimentation tank (20) is attached to one side of the water tank purification tank (26). A sewage tank overflow pipe (21) is fixedly connected to the sewage sedimentation tank (20). A purification tank overflow port (29) is opened on the water tank purification tank (26). A water tank filter screen (22) is fixedly connected to the water tank purification tank (26). The water tank filter screen (22) is fixedly connected to the main water tank (2). A magnetic filter (23) is fixedly connected to the main water tank (2). A sewage main water pipe interface (28) is fixedly connected to the magnetic filter (23).

6. The backwashing multi-stage composite constant temperature filter according to claim 3, characterized in that: The filter bucket (37) is fixedly connected to the filter bucket cover (47), the filter bucket cover (47) is fixedly connected to the filter element locking nut (44), the filter element locking nut (44) is fixedly connected to the filter element fixing plate (45), and the filter element fixing plate (45) is tightly attached to the filter bucket cover (47).

7. A backwashing multi-stage composite constant temperature filter according to claim 6, characterized in that: A filter element (46) is fixedly connected to the filter element fixing plate (45), the filter element (46) is fixedly connected to the bottom shell of the filter bucket (48), and the bottom shell of the filter bucket (48) is fixedly connected to the filter bucket support (49).

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