A conical self-centering filter structure

Abstract

The application discloses a conical self-centering filter structure and relates to the field of filter equipment, which comprises a water passing pipe for being connected with an external pipeline, a filter screen arranged in the water passing pipe, a detachable fixing pipe, a mounting pipe of the water passing pipe for mounting the fixing pipe, a water draining hole of the fixing pipe communicated with the water passing pipe and opened along the axial direction, a plug for plugging the water draining hole, a water blocking plate fixedly connected in the water passing pipe, the water blocking plate separating the water passing pipe into a water inlet end and a water outlet end which are isolated from each other, and a water passing hole of the water blocking plate for communicating the water inlet end and the water outlet end, wherein the filter screen is annular, an elastic piece one is arranged between the fixing pipe and the filter screen, the elastic piece one pushes the filter screen to be close to the water blocking plate, the filter screen shields the water passing hole, a gap between the mounting pipe and the filter screen forms a deposition cavity, the fixing ring is located in the deposition cavity, and the water draining hole is communicated with the deposition cavity. The application has the effect that impurities filtered in the pipeline can be conveniently cleaned.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of filtering equipment, in particular to a conical self-centering filtering structure. BACKGROUND

[0002] In a floor heating system, a water distributor is a device for connecting heating pipes with water supply and return pipes, which mainly includes a waterway control part, a filtering part and a drainage part. The filtering part is mainly used to prevent impurities in the heating water from entering and accumulating in the heating pipes, which can effectively prolong the service life of the heating pipes.

[0003] The related technology can refer to the Chinese patent with publication number CN220017474U, which discloses a floor heating water distributor inlet pipe fitting, including an inlet pipe, a control ball valve located on the inlet pipe, a filter located on the inlet pipe, and a pressure gauge located on the inlet pipe. The filter includes a pipe body arranged on the lower side of the inlet pipe and inclined downward toward the water flow direction, a filter sleeve embedded in the pipe body at the lower end and extending into the inlet pipe at the upper end, an end cover arranged at the lower end of the pipe body and detachably connected to the pipe body, a cavity layer is formed in the end cover and communicates with the pipe body, a drain pipe is arranged on one side of the end cover, an external thread sleeve is arranged at the end of the drain pipe away from the end cover, an internal thread cover is threadedly connected to the external thread sleeve, a rubber sealing plug is arranged in the internal thread cover for abutting against the port of the external thread sleeve, the rubber sealing plug is cylindrical and the cross-sectional outer diameter is smaller than the inner diameter of the external thread sleeve, a plurality of drain holes are formed in the end face of the internal thread cover, and a corrugated expansion pipe is arranged on the internal thread cover.

[0004] In view of the related technology in the above, when cleaning the impurities in the filter sleeve, the hot water in the filter needs to be discharged first, then the filter sleeve can be disassembled and cleaned, and the inlet pipe needs to be closed during cleaning, which makes the cleaning process more troublesome. SUMMARY

[0005] In order to facilitate the cleaning of the impurities filtered in the pipe, the present application provides a conical self-centering filtering structure.

[0006] The present application provides a conical self-centering filtering structure, which adopts the following technical scheme:

[0007] The application discloses a conical self-centering filter structure which comprises a water passing pipe used for connecting with external pipes and provided with a filter screen, and a fixing pipe located outside the water passing pipe and detachably connected with the water passing pipe, the water passing pipe is fixedly provided with a mounting pipe used for mounting the fixing pipe, the fixing pipe is provided with a water draining hole communicated with the water passing pipe in the axial direction, and the end of the fixing pipe away from the water passing pipe is provided with a plug used for plugging the water draining hole, a water blocking plate is fixedly connected inside the water passing pipe, the water blocking plate divides the water passing pipe and is provided with a water passing hole, the mounting pipe is located directly below the water passing hole in the working state of the water passing pipe, the filter screen is annular, the filter screen is located between the water blocking plate and the fixing pipe and one end of the filter screen is opposite to the water passing hole, an elastic member one is arranged between the fixing pipe and the filter screen, the elastic member one applies a pushing force to the filter screen to make the filter screen close to the water blocking plate, the end of the filter screen close to the water blocking plate is provided with a conical cylinder part, the diameter of the conical cylinder part gradually increases in the direction close to the water blocking plate, the water blocking plate is fixedly connected with a guide ring on the side close to the fixing pipe, the guide ring is arranged in the circumferential direction of the water passing hole, and the filter screen is sleeved outside the guide ring and in contact with the guide ring in the natural state of the elastic member one, the gap between the mounting pipe and the filter screen forms a deposition cavity, and the fixing pipe is located in the deposition cavity and the water draining hole is communicated with the deposition cavity.

[0008] By adopting the technical scheme, the water passing pipe is used for connecting external water supply and return pipes with indoor floor heating pipes, the fixing pipe is positioned by the mounting pipe, so that the fixing pipe is located on the side of the water blocking plate close to the ground. Under the support of the fixing pipe, the elastic member one applies a pushing force to the filter screen, so that the filter screen is attached to the guide ring, and the water blocking plate guides and limits the filter screen through the guide plate. When water flows into the water passing pipe from the water inlet end, the water flow needs to pass through the filter screen and the water passing hole in sequence under the blocking effect of the water blocking plate, and finally flows to the water outlet end. The filter screen filters the water flow, and the filter area of the filter screen is increased by arranging the conical cylinder part. For the impurities blocked by the filter screen, the impurities fall into the deposition cavity under the action of gravity, and the impurities can be discharged together with the water flow by opening the plug, so that the filter screen does not need to be removed when the impurities are cleaned, and the impurities filtered in the pipes are cleaned conveniently.

[0009] Optionally, the side, away from the water blocking plate, of the filter screen is fixedly connected with a guide pipe, the guide pipe is inserted into the water draining hole and is slidably connected with the fixing pipe in the axial direction of the water draining hole, the guide pipe is hollow and is provided with a through hole in the circumferential direction for connecting the deposition cavity and the water draining hole.

[0010] By adopting the technical scheme, when the impurities are discharged, the water flow flows in sequence along the deposition cavity, the through hole and the water draining hole, and the fixing pipe supports and guides the filter screen through the guide pipe, so that the working stability of the filter screen is improved.

[0011] Optionally, the outer edge of the guide pipe is circular, so that the guide pipe can rotate relative to the fixed pipe about the axis of the guide pipe, the lower end of the filter screen is coaxially fixed with a gear ring one, the gear ring one is engaged with a gear one, the lower end of the gear one is coaxially fixed with a transmission shaft, the fixed pipe is open in the circumferential direction to form an installation cavity, the end of the transmission shaft away from the gear one penetrates through the fixed pipe and extends into the installation cavity, the transmission shaft is rotationally connected with the fixed pipe, and the end of the transmission shaft in the installation cavity is coaxially fixed with a gear two, a gear ring two is arranged in the installation cavity, the gear ring two is rotationally connected with the fixed pipe about the axis of the gear ring two and is engaged with the gear two, the end of the gear ring two away from the filter screen is fixedly connected with a rotating ring, the rotating ring is located outside the fixed pipe, and the fixed pipe is provided with an annular opening for avoiding the rotating ring.

[0012] By adopting the above technical scheme, when the rotating ring is rotated along the annular opening, the rotating ring drives the gear ring two to rotate, the gear ring two drives the transmission shaft to rotate through the gear two, and the transmission shaft drives the gear one to rotate through the transmission shaft. Under the support of the guide pipe, when the gear one rotates, the filter screen is driven to rotate through the gear ring two, when the water flows, the side of the filter screen facing the water inlet end accumulates more impurities, by rotating the filter screen, the main filtering end face of the filter screen can be adjusted, and thus the filtering efficiency of the filter screen can be improved.

[0013] Optionally, the cleaning plate is further arranged outside the filter screen, the gear one is rotationally connected with the cleaning plate, the cleaning plate is located on the side of the filter screen away from the water inlet end, the fixed pipe is provided with a support for supporting the cleaning plate, the cleaning plate is fixedly connected with a scraper, and the scraper is attached to the outer surface of the filter screen.

[0014] By adopting the above technical scheme, the fixed pipe supports the cleaning plate through the support, so that the cleaning plate supports the scraper, when the filter screen rotates, the outer surface of the filter screen is cleaned by the scraper, and the impurities cleaned down fall into the deposition cavity under the action of gravity, and the cleaning effect of the filter screen is further improved.

[0015] Optionally, the support includes a threaded pipe, a threaded rod and a gear three, the transmission shaft includes an inner rod and an outer rod, the gear one is coaxially fixed with the inner rod, the outer rod is sleeved with the lower end of the inner rod and is slidingly connected with the inner rod in the axial direction, the inner rod drives the outer rod to synchronously rotate when the inner rod rotates, the gear two is fixedly connected to the side of the inner rod away from the outer rod, the threaded rod is fixedly connected to the side of the filter screen close to the fixed pipe, and the threaded rod is parallel to the transmission shaft, the threaded pipe is sleeved with the outer side of the threaded rod and is threadedly connected with the threaded rod, the end of the threaded pipe away from the filter screen penetrates through the fixed pipe and is rotationally connected with the fixed pipe, the gear three is located in the installation cavity, the gear three is coaxially fixed with the threaded pipe and is staggered with the gear two, the fixed pipe is provided with a pushing member for pushing the gear ring two to move along the axis, and the gear ring two is switched between the gear two and the gear three when the gear ring two moves.

[0016] By adopting the technical scheme, in the initial state, the cleaning plate is away from the filter screen, at this time, the gear ring two is engaged with the gear three, when the rotating ring rotates, the rotating ring drives the gear three to rotate through the gear ring two. When the gear three rotates, it drives the threaded pipe to rotate, the inner rod and the outer rod cooperate to limit the cleaning plate, so that the threaded pipe drives the threaded rod to move along the axis direction when rotating, and in turn drives the cleaning plate to approach or away from the filter screen. When the cleaning plate moves, the gear one approaches or away from the gear ring one, the engagement and disengagement of the gear one and the gear ring one is realized, and the cleaning plate can be stored when not working, thereby reducing the shielding of the cleaning plate to the filter screen and improving the filtering efficiency of the filter screen.

[0017] Optionally, the pushing piece comprises a top ring, an elastic piece two, a moving plate and a positioning rod, the top ring is located on the side of the rotating ring away from the gear ring two and is coaxially connected with the gear ring two, the moving plate is located on the outer side of the fixed pipe and is slidably connected with the fixed pipe along the axis direction, the elastic piece two is fixedly connected between the moving plate and the top ring, the moving plate drives the top ring to move through the elastic piece two, and the positioning rod is threadedly connected with the moving plate and penetrates through the moving plate and abuts against the fixed pipe.

[0018] By adopting the technical scheme, when the positioning rod is tightened, the positioning rod limits the moving plate in cooperation with the fixed pipe, and when the moving plate needs to be adjusted, the positioning rod can be loosened. When the moving plate moves, the elastic piece two applies a pushing force or a pulling force to the top ring, so that the top ring applies a force to the rotating ring, the rotating ring drives the gear ring two to move through the rotating ring, and the elastic piece two has a buffer space between the top ring and the moving plate, which is beneficial to reduce the probability of rigid collision between the gear ring two and the gear two or the gear three.

[0019] Optionally, the cleaning plate is circumferentially arranged around the filter screen, a gap between the filter screen and the cleaning plate constitutes a flow guide cavity, the cleaning plate is fixedly provided with a hose in communication with the flow guide cavity along the lower end, the fixed pipe is provided with a discharge hole, one end of the hose away from the cleaning plate is fixedly connected with the fixed pipe and communicates with the discharge hole, and a plug head for plugging the discharge hole is arranged on the outer side of the fixed pipe.

[0020] By adopting the technical scheme, the impurities cleaned by the scraper fall into the flow guide cavity, at this time, the plug head is opened, the water flow in the flow guide cavity drives the impurities to be sequentially discharged along the hose and the discharge hole, which is beneficial to further improve the cleaning convenience of the impurities.

[0021] Optionally, a baffle disc is further arranged in the water channel, the baffle disc is located on the side of the water blocking plate away from the fixed pipe and opposite to the water channel, and the baffle disc is slidably connected with the water channel along the axis direction, the water channel is provided with a threaded push rod for driving the baffle disc to move, and the baffle disc blocks the water channel when contacting the water blocking plate.

[0022] By adopting the technical scheme, in the initial state, the baffle plate is away from the water passing hole, and when the water flow and impurities are discharged through the drainage hole or the discharge hole, the baffle plate is driven by the threaded push rod to shield or block the water passing hole, thereby reducing the water flow passing through the water passing hole, and improving the efficiency of discharging impurities by the water flow.

[0023] To sum up, the present application has at least one of the following beneficial technical effects:

[0024] 1. The water passing pipe is used for connecting the external water supply and return pipe with the indoor floor heating pipe. The fixed pipe is positioned by the installation pipe, so that the fixed pipe is located on the side of the water stop plate close to the ground. Under the support of the fixed pipe, the elastic member applies a pushing force to the pair of filter screens, so that the filter screens are attached to the guide ring. The water stop plate guides and limits the filter screens through the guide plate. When the water flow enters the water passing pipe through the water inlet end, the water flow needs to pass through the filter screens and the water passing hole in turn under the blocking action of the water stop plate, and finally flows to the water outlet end. The filter screens filter the water flow, and the filtering area of the filter screens is increased by arranging the tapered cylinder part. For the impurities blocked by the filter screens, they fall into the deposition cavity under the action of gravity. At this time, the impurities can be discharged together with the water flow by opening the blockage. When cleaning the impurities, it is not necessary to disassemble the filter screens, and it is more convenient to clean the impurities filtered in the pipe.

[0025] 2. When the rotating ring is rotated along the annular opening, the rotating ring drives the gear ring two to rotate, the gear ring two drives the transmission shaft to rotate through the gear two, and the transmission shaft drives the gear one to rotate. Under the support of the guide pipe, the gear one drives the filter screen to rotate through the gear ring two when rotating. When the water flow flows, the impurities accumulated on the side of the filter screen facing the water inlet end are more. By rotating the filter screen, the main filtering end face of the filter screen can be adjusted, thereby improving the filtering efficiency of the filter screen. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of example 1.

[0027] Figure 2 It is a schematic diagram of the internal structure of example 1.

[0028] Figure 3 It is a schematic diagram of the overall structure of example 2.

[0029] Figure 4 It is a schematic diagram of the internal structure of example 2.

[0030] Figure 5 It is a schematic diagram aiming to highlight the structure of the support member.

[0031] Figure 6 It is a schematic diagram aiming to highlight the position of the discharge hole.

[0032] Explanation of reference signs: 1, water pipe; 11, mounting pipe; 12, water blocking plate; 121, water passing hole; 13, guide ring; 2, filter screen; 21, guide pipe; 211, passing hole; 22, tooth ring I; 3, fixed pipe; 31, drainage hole; 311, plug; 32, elastic member I; 33, mounting cavity; 34, discharge hole; 341, plug; 41, gear I; 42, transmission shaft; 421, inner rod; 422, outer rod; 423, gear II; 43, tooth ring II; 431, rotating ring; 5, cleaning plate; 51, scraper; 52, hose; 61, threaded pipe; 62, threaded rod; 63, gear III; 71, top ring; 72, elastic member II; 73, moving plate; 74, positioning rod; 8, baffle; 81, sliding rod; 82, threaded push rod. DETAILED DESCRIPTION

[0033] The application will be further described in detail below with reference to all the accompanying drawings.

[0034] The application discloses a conical self-centering filter structure.

[0035] Embodiment 1

[0036] Reference Figure 1 and Figure 2 A conical self-centering filter structure comprises a water pipe 1, which is installed between a water supply pipe or a water return pipe and a floor heating pipe. The water pipe 1 is fixedly connected with a water blocking plate 12 inside. One end of the water pipe 1 is provided as a water inlet end, and the other end is provided as a water outlet end. The water blocking plate 12 is located between the water inlet end and the water outlet end. The water blocking plate 12 comprises a horizontal plate and two vertical plates. The horizontal plate is fixedly connected to the middle position of the water pipe 1 horizontally and is parallel to the water pipe 1. The two vertical plates are fixedly connected to the two ends of the water blocking plate 12 along the length direction and are located on the opposite two end faces of the horizontal plate respectively.

[0037] Reference Figure 1 and Figure 2 The vertical plates are fixedly connected to the inner wall of the water pipe 1, so that the horizontal plate and the vertical plates cooperate to separate the water pipe 1, and the water inlet end and the water outlet end are separated from each other. The horizontal plate is provided with a water passing hole 121. When water flows into the water pipe 1 along the water inlet end, the water flows to the water passing hole 121 under the guidance of the vertical plates and the horizontal plate, and finally flows to the water outlet end through the water passing hole 121.

[0038] Reference Figure 1 and Figure 2 The water pipe 1 is fixedly connected with a mounting pipe 11, and the mounting pipe 11 is in communication with the water inlet end of the water pipe 1. The mounting pipe 11 is screw-connected with a fixed pipe 3 on the inner side. In the working state, the mounting pipe 11 is located directly below the horizontal plate. The fixed pipe 3 is provided with a drainage hole 31 in the axial direction, which is in communication with the mounting pipe 11, and the fixed pipe 3 is screw-connected with a plug 311 for plugging the drainage hole 31.

[0039] With reference to Figure 1 And Figure 2 The lower end of the transverse plate is fixedly connected with a guide ring 13 around the water hole 121, and the guide ring 13 is tapered, with the diameter gradually decreasing from top to bottom. A filter screen 2 is further arranged in the water pipe 1, between the water blocking plate 12 and the fixed pipe 3. The end of the filter screen 2 close to the water blocking plate 12 is provided with a tapered cylinder portion, and the diameter of the tapered cylinder portion gradually increases towards the water blocking plate 12, thereby increasing the filtering area of the filter screen 2, and the inner diameter of the tapered cylinder portion is matched with the guide ring 13. The end of the filter screen 2 away from the water blocking plate 12 is fixedly connected with a guide pipe 21, which is hollow and has a plurality of through holes 211 opened in the transverse direction.

[0040] With reference to Figure 1 And Figure 2 The end of the guide pipe 21 away from the filter screen 2 is inserted into the drainage hole 31 and abuts against the inner wall of the drainage hole 31. The fixed pipe 3 limits and guides the filter screen 2 through the guide pipe 21, so that the filter screen 2 moves along the axis direction of the guide pipe 21. An elastic member 32 is arranged between the fixed pipe 3 and the filter screen 2, and the elastic member 32 is a spring. The spring is sleeved outside the guide pipe 21, and one end of the spring abuts against the fixed pipe 3, and the other end abuts against the lower end surface of the filter screen 2. The gap between the mounting pipe 11 and the guide pipe 21 forms a deposition cavity, and the diameter of the deposition cavity is greater than the diameter of the filter screen 2, and the deposition cavity is directly below the filter screen 2.

[0041] With reference to Figure 1 And Figure 2 The elastic member 32 is in a compressed state, thereby pushing the filter screen 2 to abut against the guide ring 13. At this time, the filter screen 2 is sleeved outside the guide ring 13, and the water blocking plate 12 limits and guides the filter screen 2 through the guide ring 13, thereby improving the assembly convenience of the filter screen 2.

[0042] The implementation principle of the embodiment 1 is that the water blocking plate 12 guides the water flow to flow through the water hole 121, and the filter screen 2 filters the water flow when the water flow passes through the filter screen 2. The filter screen 2 is tapered, thereby increasing the filtering area of the filter screen 2. The guide pipe 21 and the guide ring 13 cooperate to guide and position the filter screen 2, thereby improving the positioning accuracy when the filter screen 2 is installed. When the water flows from the water inlet end to the water outlet end, the impurities blocked by the filter screen 2 fall into the deposition cavity under the action of gravity. When it is necessary to clean the impurities, the operator directly removes the plug 311, so that the impurities in the deposition cavity pass through the through holes 211 and are discharged by the drain pipe, and the cleaning process does not need to disassemble the filter screen 2, thereby improving the cleaning convenience. Further, when the impurities attached to the filter screen 2 are too much to affect the use of the filter screen 2, the filter screen 2 can be directly disassembled from the water pipe 1 by disassembling the fixed pipe 3, thereby meeting different cleaning requirements.

[0043] Embodiment 2

[0044] With reference to Figure 3 and Figure 4 , the difference between this embodiment and embodiment 1 is that a cleaning plate 5 is arranged outside the filter screen 2, the cleaning plate 5 is arc-shaped and located on the side of the filter screen 2 away from the water inlet end.

[0045] With reference to Figure 4 and Figure 5 , the lower end of the filter screen 2 is coaxially fixedly connected with a gear ring one 22, the cleaning plate 5 is rotationally connected with a gear one 41 engaged with the gear ring one 22, the lower end of the gear one 41 is provided with a transmission shaft 42, the transmission shaft 42 includes an inner rod 421 and an outer rod 422, the inner rod 421 is coaxially fixed to the lower end of the gear one 41, and the inner rod 421 drives the gear one 41 to rotate when rotating. The inner rod 421 is polygonal in cross section, the outer rod 422 is sleeved on the outer side of the inner rod 421 and is slidingly connected with the inner rod 421 along the axis direction, and the outer rod 422 drives the inner rod 421 to rotate when rotating.

[0046] With reference to Figure 4 and Figure 5 , the fixed tube 3 is provided with a mounting cavity 33 in the circumferential direction, one end of the outer rod 422 penetrates through the fixed tube 3 and extends into the mounting cavity 33, the end of the outer rod 422 located in the mounting cavity 33 is coaxially fixed with the gear one 41, a gear ring two 43 is placed in the mounting cavity 33, the gear ring two 43 is rotationally connected with the fixed tube 3 around its axis, and in the initial state, the gear ring two 43 is engaged with the gear two 423, and when the gear ring two 43 rotates, the gear two 423 is driven to rotate.

[0047] With reference to Figure 4 and Figure 5 , the fixed tube 3 is provided with a support member supporting the cleaning plate 5, the support member includes a threaded tube 61, a threaded rod 62 and a gear three 63, the threaded rod 62 is parallel to the inner rod 421 and is fixedly connected to the lower end of the cleaning plate 5, the threaded tube 61 is sleeved on the outer side of the threaded rod 62 and is threadedly connected with the threaded rod 62, and the threaded tube 61 is rotationally connected with the fixed tube 3. Under the support of the fixed tube 3 and the limiting action of the inner rod 421 and the outer rod 422, when the threaded tube 61 rotates, the threaded rod 62 is pushed to move along the axis direction, so that the threaded rod 62 drives the cleaning plate 5 to approach or move away from the filter screen 2.

[0048] With reference to Figure 4 and Figure 5, the cleaning plate 5 is located away from the filter screen 2, at this time the gear one 41 and the gear ring one 22 do not contact each other, and the cleaning plate 5 is not easy to cause the blockage of the filter screen 2. The gear one 41 and the gear ring one 22 are provided with the guide surface, when the cleaning plate 5 drives the gear one 41 to approach the gear ring one 22, the gear one 41 and the gear ring one 22 are guided to engage through the guide surface, and the probability of the collision of the gear one 41 and the gear ring one 22 is reduced. The cleaning plate 5 is fixedly connected with the scraper 51 at one end in the length direction, when the gear ring one 22 and the gear one 41 are completely engaged, the scraper 51 is attached to the outer surface of the filter screen 2.

[0049] Referring to Figure 5 and Figure 6 , the gap between the inner side of the cleaning plate 5 and the outer surface of the filter screen 2 constitutes a flow guide cavity, and the lower end of the cleaning plate 5 is fixedly connected with a hose 52 which is in communication with the flow guide cavity, and the hose 52 is deformed when the cleaning plate 5 moves. The fixed tube 3 is provided with a discharge hole 34 which is in communication with the outside, and one end of the hose 52 which is away from the cleaning plate 5 is fixedly connected with the fixed tube 3 and is in communication with the discharge hole 34. The fixed tube 3 is screw-connected with a plug 341 which is matched with the discharge hole 34, and in the initial state, the plug 341 is located in the discharge hole 34 and blocks the discharge hole 34.

[0050] Referring to Figure 5 and Figure 6 , one end of the threaded tube 61 which is away from the filter screen 2 penetrates through the fixed tube 3 and extends into the mounting cavity 33, and the threaded tube 61 is coaxially fixed with a gear three 63, the gear three 63 is matched with the gear ring two 43, and the gear three 63 and the gear two 42 are staggered. The gear ring two 43 is fixedly connected with an extension plate on the side which is away from the filter screen 2, the fixed tube 3 is provided with an annular opening which is in communication with the mounting cavity 33, the extension plate extends out of the annular opening and is fixedly connected with a rotating ring 431 which is convenient to hold. When the operator rotates the rotating ring 431, the rotating ring 431 drives the gear ring two 43 to rotate through the extension plate.

[0051] Referring to Figure 5 and Figure 6 , when the rotating ring 431 is pushed in the axial direction to approach the filter screen 2, the rotating ring 431 drives the gear ring two 43 to separate from the gear two 42 and approach the gear three 63, and when the gear ring two 43 reaches the maximum displacement position, the gear ring two 43 engages with the gear three 63, at this time the gear ring two 43 separates from the gear two 42. The guide tube 21 is provided with a pushing piece, and the pushing piece includes a top ring 71, an elastic piece two 72, a moving plate 73 and a positioning rod 74. The top ring 71 is located on the side of the rotating ring 431 which is away from the filter screen 2, and the top ring 71 is coaxially rotationally connected with the rotating ring 431, and when the top ring 71 moves in the axial direction, the rotating ring 431 is driven to move synchronously.

[0052] Referring to Figure 5 and Figure 6The moving plate 73 is located outside the fixed tube 3, and the fixed tube 3 is in sliding connection with the fixed tube 3 in the axial direction. The second elastic member 72 is also a spring, and one end of the spring is fixedly connected with the moving plate 73, and the other end is rotatably connected with the top ring 71. When the moving plate 73 moves, the second elastic member 72 applies an axial force to the top ring 71. The positioning rod 74 passes through the moving plate 73 in the transverse direction and is screwedly connected with the moving plate 73. When the positioning rod 74 is tightened, the positioning rod 74 abuts against the outer surface of the fixed tube 3. At this time, the movement of the moving plate 73 is limited by the positioning rod 74, thereby achieving the positioning of the moving plate 73. When the moving plate 73 needs to be adjusted, the positioning rod 74 can be directly loosened.

[0053] With reference to Figure 4 and Figure 6 The water passing pipe 1 is further provided with a baffle plate 8 located on the side of the water blocking plate 12 away from the fixed tube 3, and the baffle plate 8 is opposite to the water passing hole 121. The water passing pipe 1 is fixedly connected with a sliding rod 81 in the axial direction of the water passing hole 121, and the sliding rod 81 passes through and is in sliding connection with the baffle plate 8. The water passing pipe 1 is rotatably connected with a threaded sleeve pipe parallel to the sliding rod 81, and the baffle plate 8 is fixedly connected with a threaded push rod 82 matched with the threaded sleeve pipe. The threaded push rod 82 is inserted into the inner side of the threaded sleeve pipe and is in threaded connection with the threaded sleeve pipe. Under the limiting action of the sliding rod 81, when the threaded sleeve pipe is rotated, the threaded sleeve pipe pushes the baffle plate 8 to approach or move away from the water passing hole 121. When the baffle plate 8 is attached to the water blocking plate 12, the water passing hole 121 is blocked.

[0054] The implementation principle of the embodiment 2 is as follows: in the initial state, the second gear ring 43 is engaged with the third gear 63, and at this time, the cleaning plate 5 is located away from the filter screen 2. The second gear ring 43 is rotated by rotating the ring 431, so that the second gear ring 43 drives the threaded pipe 61 to rotate through the third gear 63. The threaded pipe 61 drives the cleaning plate 5 to approach the filter screen 2 through the threaded rod 62. When the cleaning plate 5 drives the scraper 51 to attach to the outer surface of the filter screen 2, the first gear 41 is engaged with the first gear ring 22. At this time, the second gear ring 43 is moved in the axial direction, so that the second gear ring 43 is engaged with the second gear 423. The second gear ring 43 is rotated again, so that the second gear ring 43 drives the outer rod 422 to rotate through the second gear 423. The outer rod 422 drives the first gear 41 to rotate through the inner rod 421, and then drives the filter screen 2 to rotate through the engagement of the first gear 41 and the first gear ring 22. When the filter screen 2 rotates, the outer surface of the filter screen 2 is cleaned by the scraper 51. The impurities cleaned are accumulated in the flow guide cavity. At this time, the plug 341 is removed, so that the impurities in the flow guide cavity are discharged along the hose 52 and the discharge hole 34 in sequence with the water flow, and then the cleaning of the outer surface of the filter screen 2 is completed. Further, the water passing hole 121 is blocked by moving the baffle plate 8, so that the water flow is prevented from passing through the water passing hole 121. At this time, the water flow can only be discharged from the discharge hole 34, and the water flow passes through the filter screen 2 and flows to the flow guide cavity, so as to reversely flush the impurities on the filter screen 2, and further improve the cleaning efficiency of the filter screen 2.

[0055] The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, and thus: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A self-centering filtering structure of the conical type comprising a through pipe (1) for connection to an external pipe and provided with a filtering screen (2), characterized in that: Also include fixed pipe (3), fixed pipe (3) is located outside the water pipe (1) and is detachably connected with water pipe (1), water pipe (1) is fixedly provided with the installation pipe (11) for installing fixed pipe (3), fixed pipe (3) is opened along the axis direction with the drainage hole (31) communicated with water pipe (1), and the end of fixed pipe (3) away from water pipe (1) is provided with the plug (311) for plugging the drainage hole (31), the water stop plate (12) is fixedly connected inside water pipe (1), the water stop plate (12) separates water pipe (1) and is opened with water hole (121), water pipe (1) working state, installation pipe (11) is located below water hole (121), the filter screen (2) is annular, the filter screen (2) is located between the water stop plate (12) and the fixed pipe (3), and one end of the filter screen (2) is opposite to the water hole (121), the elastic element one (32) is arranged between the fixed pipe (3) and the filter screen (2), the elastic element one (32) exerts the thrust to the filter screen (2) close to the water stop plate (12), the end of the filter screen (2) close to the water stop plate (12) is provided as a tapered cylinder part, the diameter of the tapered cylinder part gradually increases towards the water stop plate (12), the water stop plate (12) is fixedly connected with the guide ring (13) on the side close to the fixed pipe (3), the guide ring (13) is arranged along the circumference of the water hole (121), the filter screen (2) is sleeved outside the guide ring (13) and is in contact with the guide ring (13) in the natural state of the elastic element one (32), the gap between the installation pipe (11) and the filter screen (2) constitutes a deposition cavity, the fixed pipe (3) is located in the deposition cavity, and the drainage hole (31) is communicated with the deposition cavity.

2. A conical self-centering filter structure according to claim 1, characterized in that: The side of the filter screen (2) away from the water stop plate (12) is fixedly connected with the guide pipe (21), the guide pipe (21) is inserted into the drainage hole (31) and is slidably connected with the fixed pipe (3) along the axis direction of the drainage hole (31), the guide pipe (21) is hollowly arranged, and is opened along the circumference with the through hole (211) for communicating the deposition cavity and the drainage hole (31).

3. A conical self-centering filter structure according to claim 2, characterized in that: The outer edge of the guide pipe (21) is circular, so that the guide pipe (21) can rotate relative to the fixed pipe (3) about its own axis, and the lower end of the filter screen (2) is coaxially fixed with a tooth ring I (22), the tooth ring I (22) is engaged with a gear I (41), the lower end of the gear I (41) is coaxially fixed with a transmission shaft (42), the fixed pipe (3) is open in the circumferential direction and has a mounting cavity (33), one end of the transmission shaft (42) away from the gear I (41) penetrates through the fixed pipe (3) and extends into the mounting cavity (33), the transmission shaft (42) is rotatably connected with the fixed pipe (3), and one end of the transmission shaft (42) located in the mounting cavity (33) is coaxially fixed with a gear II (423), the mounting cavity (33) is provided with a tooth ring II (43), the tooth ring II (43) is rotatably connected with the fixed pipe (3) about its own axis and is engaged with the gear II (423), one end of the tooth ring II (43) away from the filter screen (2) is fixedly connected with a rotating ring (431), the rotating ring (431) is located outside the fixed pipe (3), and the fixed pipe (3) is provided with an annular opening for avoiding the rotating ring (431).

4. A conical self-centering filter structure according to claim 3, characterized in that: Further comprising a cleaning plate (5), the cleaning plate (5) is sleeved outside the filter screen (2), the gear I (41) is rotatably connected with the cleaning plate (5), and the cleaning plate (5) is located on the side of the filter screen (2) away from the water inlet end, the fixed pipe (3) is provided with a support for supporting the cleaning plate (5), the cleaning plate (5) is fixedly connected with a scraper (51), and the scraper (51) is attached to the outer surface of the filter screen (2).

5. A conical self-centering filter structure according to claim 4, characterized in that: The support comprises a threaded pipe (61), a threaded rod (62) and a gear III (63), the transmission shaft (42) comprises an inner rod (421) and an outer rod (422), the gear I (41) is coaxially fixed with the inner rod (421), the outer rod (422) is sleeved on the lower end of the inner rod (421) and is slidably connected with the inner rod (421) along the axial direction, the inner rod (421) drives the outer rod (422) to rotate synchronously when rotating, the gear II (423) is fixedly connected to one side of the inner rod (421) away from the outer rod (422), the threaded rod (62) is fixedly connected to one side of the filter screen (2) close to the fixed pipe (3), and the threaded rod (62) is parallel to the transmission shaft (42), the threaded pipe (61) is sleeved outside the threaded rod (62) and is threadedly connected with the threaded rod (62), one end of the threaded pipe (61) away from the filter screen (2) penetrates through the fixed pipe (3) and is rotatably connected with the fixed pipe (3), the gear III (63) is located in the mounting cavity (33), and the gear III (63) is coaxially fixed with the threaded pipe (61) and is staggered with the gear II (423), the fixed pipe (3) is provided with a pushing member for pushing the tooth ring II (43) to move along the axis, and the tooth ring II (43) switches between the gear II (423) and the gear III (63) when moving.

6. A conical self-centering filter structure according to claim 5, characterized in that: The pushing member comprises a top ring (71), an elastic member two (72), a moving plate (73) and a positioning rod (74), the top ring (71) is located on the side of the rotating ring (431) away from the tooth ring two (43) and is coaxially connected with the tooth ring two (43), the moving plate (73) is located on the outer side of the fixed tube (3) and is connected with the fixed tube (3) in the axial direction, the elastic member two (72) is fixedly connected between the moving plate (73) and the top ring (71), the moving plate (73) drives the top ring (71) to move through the elastic member two (72), and the positioning rod (74) is threadedly connected with the moving plate (73) and penetrates through the moving plate (73) and abuts against the fixed tube (3).

7. A conical self-centering filter structure according to claim 4, characterized in that: The cleaning plate (5) is circumferentially arranged around the filter screen (2), and the gap between the filter screen (2) and the cleaning plate (5) forms a flow guide cavity, the cleaning plate (5) is fixedly provided with a hose (52) in communication with the flow guide cavity along the lower end, the fixed tube (3) is provided with a discharge hole (34), one end of the hose (52) away from the cleaning plate (5) is fixedly connected with the fixed tube (3) and is in communication with the discharge hole (34), and the outer side of the fixed tube (3) is provided with a plug (341) for plugging the discharge hole (34).

8. A conical self-centering filter structure according to claim 1, characterized in that: The water passing pipe (1) is further provided with a baffle disc (8), the baffle disc (8) is located on the side of the water blocking plate (12) away from the fixed tube (3) and is opposite to the water passing hole (121) and is connected with the water passing pipe (1) in the axial direction, the water passing pipe (1) is provided with a threaded push rod (82) for pushing the baffle disc (8) to move, and the baffle disc (8) blocks the water passing hole (121) when being in contact with the water blocking plate (12).

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