A self-cleaning geothermal heating filter device

Abstract

The present invention discloses a self-cleaning geothermal heating filter device, comprising: a housing, a side wall of the housing being connected to a water inlet pipe, a filter element fixed within the housing, a water outlet end of the filter element extending from the bottom of the housing; a scraper element disposed above the filter element, the top end of the scraper element penetrating the top end of the housing and being rotatably connected to the housing, at least one scraper end fixedly connected to the bottom end of the scraper element, the scraper end contacting the outer wall of the filter element, and a dirt collecting element fixedly connected to the bottom end of the scraper end; a floating element sleeved outside the filter element, the scraper end located inside the floating element, a limit member fixedly connected to the inner wall of the housing, the floating element vertically rising and falling along the inner wall of the housing via the limit member, the floating element being transmission-connected to the scraper element and used to drive the scraper element to rotate; and a pumping element fixed to the top end of the housing, the pumping element being activated at a fixed time, the air outlet end of the pumping element being connected to the floating element. The present invention can reduce driving energy consumption when driving the scraping component, while facilitating the collection of scraped impurities.

Description

Technical Field

[0001] The present invention belongs to the technical field of geothermal heating equipment, and in particular relates to a self-cleaning geothermal heating filter device. Background Art

[0002] Geothermal heating has many advantages and has become increasingly popular in recent years. When using geothermal heating, the circulating water for heating needs to be filtered to remove the scale generated in the circulating water and the impurity particles in the circulating water itself. The purpose is to ensure the heating effect and the service life of the heating pipes.

[0003] In the prior art, conventional circulating water filtration devices usually use a driving device to control scrapers and other scraping components to scrape the surface of the filter screen or filter cartridge. When cleaning the surface of the filter screen or filter cartridge, the driving device needs to work continuously to drive the scraping components to move. This process increases energy consumption. At the same time, impurities scraped from the surface of the filter screen or filter cartridge are not easy to leave the inside of the filter device, affecting the normal filtration of the circulating water by the filter device. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention proposes a self-cleaning geothermal heating filter device, which can reduce the driving energy consumption when driving the scratching component, and facilitate the collection of scraped impurities.

[0005] To achieve the above object, the present invention provides a self-cleaning geothermal heating filter device, comprising:

[0006] A housing, wherein a side wall of the housing is connected to a water inlet pipe, a filter element is fixed in the housing, and a water outlet end of the filter element extends from the bottom of the housing;

[0007] a scraper disposed above the filter element, wherein the top end of the scraper passes through the top end of the housing and is rotatably connected to the housing, and the bottom end of the scraper element is fixedly connected to at least one scraping end, the scraping end contacts the outer wall of the filter element, and the bottom end of the scraping end is fixedly connected to a dirt collecting element;

[0008] a floating member, sleeved outside the filter element, the scraping end being located inside the floating member, a limiting member being fixedly connected to the inner wall of the shell, the floating member being vertically raised and lowered along the inner wall of the shell via the limiting member, the floating member being transmission-connected to the scraping member and being used to drive the scraping member to rotate;

[0009] The draw-out component is fixed on the top of the shell, the draw-out component is started at a fixed time, and the air outlet end of the draw-out component is communicated with the floating component.

[0010] Furthermore, the scraping element includes a rotating plate arranged above the filter element, a rotating rod is fixed to the top of the rotating plate, the other end of the rotating rod passes through the top of the outer shell, and the rotating rod is rotatably connected to the outer shell, and the scraping end is a scraper fixed to the bottom end of the rotating plate.

[0011] Furthermore, the floating element includes a counterweight ring mounted on the outside of the filter element, the bottom end of the counterweight ring is fixedly connected to an inflatable float, the inflatable float is connected to the pumping and releasing element, and a gap is provided between the inner wall of the inflatable float, the inner wall of the counterweight ring and the side of the scraper away from the floating element.

[0012] Furthermore, the limiting member includes a plurality of limiting plates fixed to the inner wall of the outer shell, the outer wall of the counterweight ring is provided with a limiting groove matching the limiting plate, the limiting plate is located in the limiting groove, and the counterweight ring is slidably connected to the inner wall of the outer shell through the limiting plate.

[0013] Furthermore, a transmission support rod is fixedly connected to the top of the counterweight ring, and the other end of the transmission support rod passes through the top of the outer shell and extends out of the outer shell. A threaded sleeve is provided at the top of the outer shell, and the bottom end of the threaded sleeve is rotatably connected to the top of the outer shell. The transmission support rod is inserted into the threaded sleeve, and the external thread of the transmission support rod is matched with the internal thread of the threaded sleeve. The outer wall of the threaded sleeve is fixedly connected to a first transmission gear, and the outer wall of the rotating rod is fixedly connected to a second transmission gear, and the first transmission gear is meshed with the second transmission gear.

[0014] Furthermore, the pumping component includes a pumping pump, the air outlet end of the pumping pump is fixedly connected to an air guide hose, and the air guide hose passes through the top of the shell and the top of the counterweight ring and is connected to the inflatable float bag.

[0015] Furthermore, the filter element includes a filter cartridge arranged in the outer shell, a support ring plate is fixedly connected to the bottom of the inner wall of the outer shell, the bottom end of the filter cartridge extends into the inner ring of the support ring plate and is fixed to the support ring plate, and the support ring plate is used to close the gap between the outer wall of the filter cartridge and the inner wall of the outer shell, the bottom end of the outer shell is fixedly connected to a conical cylinder, and the bottom end of the filter cartridge is connected and fixed to a drain pipe, and the water outlet end of the drain pipe passes through the side wall of the conical cylinder and extends out of the conical cylinder.

[0016] Furthermore, a sewage discharge port is provided at the top of the support ring plate, and the sewage collecting member includes a sewage collecting plate fixed to the bottom end of the scraper, and the bottom end of the sewage collecting plate contacts and is slidably connected to the top end of the support ring plate.

[0017] Furthermore, the bottom end of the conical cylinder is fixedly connected to a sewage cylinder, a sealing ball is provided in the sewage cylinder, and a sewage passage matching the inner wall of the sewage cylinder is opened on the sealing ball. Adjustment rods are respectively provided on both sides of the sewage passage, one end of the adjustment rod is fixedly connected to the outer wall of the sealing ball, and the other end of the adjustment rod passes through the side wall of the sewage cylinder and extends out of the sewage cylinder, and the adjustment rod is rotatably connected to the sewage cylinder.

[0018] Compared with the prior art, the present invention has the following advantages and technical effects:

[0019] 1. A floating member is provided between the inner wall of the housing and the outer side of the filter element. The floating member floats in the housing due to the buoyancy of the water in the housing. At the same time, the floating member is connected to the scraper element through transmission. When cleaning the filter element, it is only necessary to extract the air in the floating member. The floating member descends under the action of its own weight, which can drive the scraper element to rotate. This process does not require an additional drive device (such as a motor) to work continuously, thereby reducing energy consumption.

[0020] 2. When the scraping end of the scraping member moves along the outer wall of the filter element, the scraping end drives the dirt collecting member to move, collecting the scraped impurities, thereby facilitating the scraped impurities to be discharged from the outer shell.

[0021] 3. By setting a timed start-up pumping and releasing member, it is ensured that the floating member is started at a certain interval, that is, the reciprocating rise and fall of the floating member is used to clean the surface of the filter element, thereby realizing the self-cleaning function of the filter device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of this application. The exemplary embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the accompanying drawings:

[0023] Figure 1 is a three-dimensional diagram of a filtering device;

[0024] Figure 2 It is a three-dimensional diagram of the floating state of the counterweight ring;

[0025] Figure 3 It is a three-dimensional diagram of the counterweight ring in the sunken state;

[0026] Figure 4 This is an exploded view of the positional relationship between the counterweight ring and the filter cartridge;

[0027] Figure 5 This is a top view with the top of the shell removed;

[0028] Figure 6 This is an exploded view of the connection between the filter cartridge and the conical cartridge;

[0029] Figure 7 This is an exploded view of the sewage tank;

[0030] Figure 8 is a perspective view of Example 2;

[0031] Among them, 1- shell, 2- water inlet pipe, 3- rotating plate, 4- rotating rod, 5- scraper, 6- counterweight ring, 7- inflatable float, 8- limiting plate, 9- transmission support rod, 10- threaded sleeve, 11- first transmission gear, 12- second transmission gear, 13- pumping pump, 14- air guide hose, 15- filter cartridge, 16- support ring plate, 17- conical cylinder, 18- drain pipe, 19- sewage outlet, 20- sewage collecting plate, 21- sewage cylinder, 22- blocking ball, 23- adjusting rod, 24- sewage channel, 25- counterweight groove, 26- counterweight block, 27- limiting ring, 28- support leg, 29- vent pipe, 30- timed vent valve. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example 1

[0035] Reference Figure 1-7 The present invention provides a self-cleaning geothermal heating filter device, comprising: an outer shell 1, a water inlet pipe 2 being connected to the side wall of the outer shell 1, a filter element being fixed inside the outer shell 1, and a water outlet end of the filter element extending from the bottom of the outer shell 1; a scraping element being arranged above the filter element, the top end of the scraping element passing through the top end of the outer shell 1 and being rotatably connected to the outer shell 1, at least one scraping end being fixedly connected to the bottom end of the scraping element, the scraping end being in contact with the outer wall of the filter element, and a dirt collecting element being fixedly connected to the bottom end of the scraping end; a floating element being sleeved outside the filter element, the scraping end being located on the inner side of the floating element, a limiting element being fixed to the inner wall of the outer shell 1, the floating element being vertically lifted and lowered along the inner wall of the outer shell 1 through the limiting element, the floating element being transmission-connected to the scraping element and being used to drive the scraping element to rotate; a pumping element being fixed to the top end of the outer shell 1, the pumping element being started at a fixed time, and the air outlet end of the pumping element being connected to the floating element.

[0036] When the filtering device is filtering circulating water normally, circulating water is introduced into the housing 1 through the water inlet pipe 2. The circulating water enters the interior of the filter element after being filtered by the filter element and is discharged from the bottom of the filter element through the bottom of the housing 1. Impurities contained in the circulating water are isolated on the outer surface of the filter element and adhere to the outer surface of the filter element. During normal filtration, the floating element is located at the highest position in the housing 1, floating or suspended in the circulating water. The pumping element is started at a fixed time, that is, the pumping element pumps air from the floating element, the buoyancy of the floating element is reduced, and the floating element moves downward under the action of its own weight. Due to the presence of the limiter, the floating element can only move vertically downward along the inner wall of the housing 1. During the downward movement of the floating element, it drives the scraping element to rotate, and the scraping end on the scraping element contacts the outer wall of the filter element, that is, the scraping end rotates with the scraping element to clean the impurities on the surface of the filter element. The scraped impurities fall to the bottom of the housing 1 and are collected by the dirt collecting element connected to the scraping end.

[0037] After the float descends to a certain position, the pumping and releasing element deflates the float, inflating it and causing it to move upward. This in turn drives the scraping end of the scraping element to reverse, further scraping impurities from the filter surface, thereby improving the cleaning effect. Compared to existing systems that rely on a motor to drive the scraping end, this technical solution only requires pumping and releasing air, and by changing the buoyancy of the float, the filter surface can be cleaned, which can relatively reduce energy consumption.

[0038] Furthermore, four legs 28 are fixedly connected to the outer wall of the housing 1 to ensure support for the housing 1 .

[0039] A further optimized solution is that the scraping element includes a rotating plate 3 arranged above the filter element, a rotating rod 4 is fixed to the top of the rotating plate 3, the other end of the rotating rod 4 passes through the top of the outer shell 1, and the rotating rod 4 is rotatably connected to the outer shell 1, and the scraping end is a scraper 5 fixed to the bottom end of the rotating plate 3.

[0040] It can be understood that the rotating plate 3 is located above the filter element and between the inner wall of the top end of the shell 1. The rotating rod 4 it has extends out of the top end of the shell 1. At the same time, the rotating rod 4 serves to connect the rotating plate 3 and the top end of the shell 1. Under the action of the floating member, the rotating rod 4 rotates, thereby driving the rotating plate 3 to rotate, and the rotating plate 3 drives the scraper 5 to rotate along the outer wall of the filter element.

[0041] Optionally, the number of scrapers 5 can be one, two, three, etc.

[0042] Furthermore, the end surface of the scraper 5 that contacts the filter element is a pointed end. In this arrangement, the scraper 5 can scrape and clean the surface of the filter element regardless of whether it rotates forward or reverse.

[0043] Specifically, the rotating rod 4 is installed on the top of the housing 1 through a bearing (not shown in the figure) sleeved on the outer wall and can rotate relative to the housing 1.

[0044] In a further optimization, the float element includes a weighted ring 6 that fits over the outside of the filter element. An inflatable bladder 7 is affixed to the bottom end of the weighted ring 6. The bladder 7 is connected to the pumping element, and a gap is defined between the inner wall of the bladder 7 and the inner wall of the weighted ring 6, and the side of the scraper 5 facing away from the float element. The weighted ring 6 provides both weight and support. The bladder 7 is fixed to its bottom end, and the pumping element pumps or deflates the bladder, causing the weighted ring 6 to rise or sink under the action of the bladder 7. Furthermore, the gap between the inner wall of the bladder 7 and the inner wall of the weighted ring 6 and the side of the scraper 5 facing away from the float element allows circulating water introduced into the housing 1 via the water inlet pipe 2 to fill the entire housing 1. Furthermore, this gap facilitates the movement of the scraper 5.

[0045] In one embodiment of the present invention, the water inlet end of the water inlet pipe 2 extends into the housing 1. In this arrangement, the water inlet end of the water inlet pipe 2 needs to be located above the highest end of the counterweight ring 6 within the housing 1. This prevents the water inlet pipe 2 from interfering with the normal movement of the counterweight ring 6. The circulating water discharged from the water inlet pipe 2 can flow below the counterweight ring 6 through the gap provided between the inner wall of the counterweight ring 6 and the side of the scraper 5 away from the floating member.

[0046] In another embodiment of the present invention, the water inlet end of the water inlet pipe 2 does not extend into the housing 1 or is flush with the inner wall of the housing 1. In this arrangement, the water inlet pipe 2 does not affect the movement of the counterweight ring 6, and therefore, the water inlet pipe 2 can be placed in different positions.

[0047] Furthermore, a plurality of counterweight grooves 25 are provided at the top of the counterweight ring 6, and counterweight blocks 26 are optionally placed in the counterweight grooves 25. The counterweight blocks 26 are used to change the deadweight of the counterweight ring 6. Under this setting, the normal floating and sinking of the counterweight ring 6 can be ensured by adding or removing the counterweight blocks 26.

[0048] In a further optimized solution, the limiting member includes a plurality of limiting plates 8 fixedly connected to the inner wall of the housing 1. The outer wall of the counterweight ring 6 is provided with limiting grooves that match the limiting plates 8. The limiting plates 8 are located in the limiting grooves, and the counterweight ring 6 is slidably connected to the inner wall of the housing 1 through the limiting plates 8. Since a plurality of limiting plates 8 are provided and the limiting plates 8 are connected to the counterweight ring 6 through the limiting grooves, the counterweight ring 6 will not rotate when it floats or sinks, thereby realizing the transmission of the rotating plate 3.

[0049] To further optimize the solution, a transmission support rod 9 is fixedly connected to the top of the counterweight ring 6, and the other end of the transmission support rod 9 passes through the top of the outer shell 1 and extends out of the outer shell 1. A threaded sleeve 10 is provided at the top of the outer shell 1, and the bottom end of the threaded sleeve 10 is rotatably connected to the top of the outer shell 1. The transmission support rod 9 is inserted into the threaded sleeve 10, and the external thread of the transmission support rod 9 is matched with the internal thread of the threaded sleeve 10. The outer wall of the threaded sleeve 10 is fixedly mounted with a first transmission gear 11, and the outer wall of the rotating rod 4 is fixedly mounted with a second transmission gear 12, and the first transmission gear 11 is meshed with the second transmission gear 12.

[0050] When the counterweight ring 6 floats up or sinks, it drives the transmission support rod 9 to move. The outer wall of the transmission support rod 9 fits well with the inner wall of the threaded sleeve 10. Therefore, when the transmission support rod 9 moves, it can drive the threaded sleeve 10 to rotate, and the threaded sleeve 10 drives the first transmission gear 11 to rotate, and then the first transmission gear 11 drives the second transmission gear 12 to rotate. The second transmission gear 12 drives the rotating rod 4 to rotate, and the counterweight ring 6 can realize the transmission of the rotating plate 3 when floating or sinking.

[0051] Furthermore, a limiting ring 27 is fixedly mounted on the rotating rod 4 . The limiting ring 27 is located above the second transmission gear 12 and is used to limit the position of the second transmission gear 12 .

[0052] To further optimize the solution, the pumping and releasing component includes a pumping and releasing pump 13 , the air outlet end of the pumping and releasing pump 13 is fixedly connected to an air guide hose 14 , and the air guide hose 14 passes through the top of the shell 1 and the top of the counterweight ring 6 and is connected to the inflatable float 7 .

[0053] The suction and discharge pump 13 has the function of suctioning and deflation. It can be a dual-purpose pump for vacuuming and deflation, or it can be two pumps with suction and deflation functions respectively. When the suction and discharge pump 13 is two pumps with suction and deflation functions respectively, it can be connected to the air guide hose 14 through a three-way pipe, and the operation of the suction and deflation pumps can be selectively controlled to realize the inflation and suction operations of the inflatable float 7. At the same time, the air guide hose 14 has a certain length, and it can move with the counterweight ring 6.

[0054] Specifically, a timing device (not shown in the figure) can be provided on the drainage pump 13, and the drainage pump 13 and the power supply are connected through the timing device. At certain time intervals, the drainage pump 13 and the power supply are connected through the timing device, so that the interval operation of the drainage pump 13 can be realized. Alternatively, the start and stop of the drainage pump 13 can be controlled by computer control or other methods. The above connection methods and usage methods are all existing technologies and will not be described in detail here.

[0055] A further optimized solution includes a filter element comprising a filter cartridge 15 disposed within the housing 1. A support ring plate 16 is fixedly attached to the bottom of the inner wall of the housing 1. The bottom end of the filter cartridge 15 extends into the inner ring of the support ring plate 16 and is fixedly attached to the support ring plate 16. The support ring plate 16 is used to close the gap between the outer wall of the filter cartridge 15 and the inner wall of the housing 1. A conical cylinder 17 is fixedly connected to the bottom end of the housing 1. A drain pipe 18 is fixedly connected to the bottom end of the filter cartridge 15. The outlet end of the drain pipe 18 passes through the side wall of the conical cylinder 17 and extends outside the conical cylinder 17. The filter cartridge 15 is used to filter circulating water. The support ring plate 16 is used to support and fix the filter cartridge 15. At the same time, it is used to close the connection between the bottom outer wall of the filter cartridge 15 and the conical cylinder 17. The drain pipe 18 is used to discharge the filtered water.

[0056] As a further optimization, a drainage port 19 is provided at the top of the support ring plate 16. The sewage collection member includes a sewage collecting plate 20 fixedly connected to the bottom end of the scraper 5. The bottom end of the sewage collecting plate 20 contacts and slides with the top end of the support ring plate 16. The sewage drainage port 19 is provided on the support ring plate 16. When the rotating plate 3 rotates the scraper 5, the scraper 5 also rotates the sewage collecting plate 20. The rotation of the sewage collecting plate 20 collects impurities that fall to the top end of the support ring plate 16 and directs them into the drainage port 19. The impurities are then collected by the conical cylinder 17, thus preventing the scraped impurities from re-adhering to the filter cylinder 15.

[0057] To further optimize the solution, the bottom end of the conical cylinder 17 is fixedly connected to a sewage cylinder 21, and a blocking ball 22 is provided in the sewage cylinder 21. A sewage passage 24 that matches the inner wall of the sewage cylinder 21 is opened on the blocking ball 22. Adjustment rods 23 are respectively provided on both sides of the sewage passage 24. One end of the adjustment rod 23 is fixedly connected to the outer wall of the blocking ball 22, and the other end of the adjustment rod 23 passes through the side wall of the sewage cylinder 21 and extends out of the sewage cylinder 21. The adjustment rod 23 is rotatably connected to the sewage cylinder 21. Under normal conditions, the sewage passage 24 on the blocking ball 22 is not connected to the conical cylinder 17. After a period of time, when it is necessary to clean the impurities in the conical cylinder 17, the adjustment rod 23 is rotated to drive the blocking ball 22 to rotate to connect the sewage passage 24 with the conical cylinder 17, so that the impurities can be discharged.

[0058] Example 2

[0059] like Figure 8 As shown, this embodiment differs from Example 1 in that the pumping pump 13 only inflates the inflatable float 7. A deflation pipe 29 is connected to the inflatable float 7, extending from the top of the housing 1. A timed deflation valve 30 is provided on the deflation pipe 29. With this arrangement, the pumping pump 13 cooperates with the timed deflation valve 30, meaning that when the counterweight ring 6 sinks, the pumping pump 13 is not required to operate; only the timed deflation valve 30 needs to be opened to deflate the inflatable float 7, further reducing energy consumption.

[0060] The above are merely preferred embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A self-cleaning geothermal heating filter device, characterized by: include, A housing (1), wherein a side wall of the housing (1) is connected to a water inlet pipe (2), a filter element is fixed in the housing (1), and a water outlet end of the filter element extends from the bottom of the housing (1); A scraping member is arranged above the filter element, the top end of the scraping member passes through the top end of the housing (1) and is rotatably connected to the housing (1), the bottom end of the scraping member is fixedly connected to at least one scraping end, the scraping end contacts the outer wall of the filter element, and the bottom end of the scraping end is fixedly connected to a dirt collecting member; A floating member is sleeved outside the filter element, the scraping end is located inside the floating member, the inner wall of the shell (1) is fixedly connected to a limiting member, the floating member is vertically lifted and lowered along the inner wall of the shell (1) through the limiting member, and the floating member is transmission-connected to the scraping member and is used to drive the scraping member to rotate; A draw-out member is fixed to the top of the housing (1), the draw-out member is started at a fixed time, and an air outlet end of the draw-out member is connected to the floating member; The scraping element comprises a rotating plate (3) arranged above the filter element, a rotating rod (4) is fixed to the top end of the rotating plate (3), the other end of the rotating rod (4) passes through the top end of the housing (1), and the rotating rod (4) is rotatably connected to the housing (1), and the scraping end is a scraper (5) fixed to the bottom end of the rotating plate (3); The floating element comprises a weight ring (6) sleeved on the outside of the filter element, an inflatable float (7) is fixedly connected to the bottom end of the weight ring (6), the inflatable float (7) is communicated with the pumping element, and a gap is provided between the inner wall of the inflatable float (7), the inner wall of the weight ring (6), and the side of the scraper (5) away from the floating element; The top of the counterweight ring (6) is fixedly connected with a transmission support rod (9), the other end of the transmission support rod (9) passes through the top of the shell (1) and extends out of the shell (1), the top of the shell (1) is provided with a threaded sleeve (10), the bottom end of the threaded sleeve (10) is rotatably connected to the top of the shell (1), the transmission support rod (9) is inserted into the threaded sleeve (10), and the external thread of the transmission support rod (9) is matched with the internal thread of the threaded sleeve (10), the outer wall of the threaded sleeve (10) is fixedly connected with a first transmission gear (11), the outer wall of the rotating rod (4) is fixedly connected with a second transmission gear (12), and the first transmission gear (11) is meshed with the second transmission gear (12); The pumping and releasing component includes a pumping and releasing pump (13), the air outlet end of the pumping and releasing pump (13) is fixedly connected to an air guide hose (14), and the air guide hose (14) passes through the top end of the shell (1) and the top end of the counterweight ring (6) and is connected to the inflatable float (7).

2. The self-cleaning geothermal heating filter device according to claim 1, characterized in that: The limiting member comprises a plurality of limiting plates (8) fixedly connected to the inner wall of the outer shell (1); the outer wall of the counterweight ring (6) is provided with a limiting groove matching the limiting plates (8); the limiting plates (8) are located in the limiting grooves, and the counterweight ring (6) is slidably connected to the inner wall of the outer shell (1) through the limiting plates (8).

3. The self-cleaning geothermal heating filter device according to claim 1, characterized in that: The filter element comprises a filter cartridge (15) arranged in the housing (1); a support ring plate (16) is fixedly connected to the bottom of the inner wall of the housing (1); the bottom end of the filter cartridge (15) extends into the inner ring of the support ring plate (16) and is fixedly connected to the support ring plate (16); the support ring plate (16) is used to close the gap between the outer wall of the filter cartridge (15) and the inner wall of the housing (1); the bottom end of the housing (1) is fixedly connected to a conical cylinder (17); the bottom end of the filter cartridge (15) is connected and fixed to a drain pipe (18); the water outlet end of the drain pipe (18) passes through the side wall of the conical cylinder (17) and extends out of the conical cylinder (17).

4. The self-cleaning geothermal heating filter device according to claim 3, characterized in that: The top end of the support ring plate (16) is provided with a sewage discharge port (19), and the sewage collecting member comprises a sewage collecting plate (20) fixedly connected to the bottom end of the scraper (5), and the bottom end of the sewage collecting plate (20) contacts and is slidably connected to the top end of the support ring plate (16).

5. The self-cleaning geothermal heating filter device according to claim 4, characterized in that: The bottom end of the conical cylinder (17) is fixedly connected to a sewage cylinder (21), a sealing ball (22) is arranged in the sewage cylinder (21), and a sewage passage (24) matching the inner wall of the sewage cylinder (21) is opened on the sealing ball (22), and an adjusting rod (23) is respectively arranged on both sides of the sewage passage (24), one end of the adjusting rod (23) is fixedly connected to the outer wall of the sealing ball (22), and the other end of the adjusting rod (23) passes through the side wall of the sewage cylinder (21) and extends out of the sewage cylinder (21), and the adjusting rod (23) is rotatably connected to the sewage cylinder (21).

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