Self-cleaning filter and check valve

Abstract

The invention relates to the technical field of pipeline filters, in particular to a self-cleaning filter and a check valve, the self-cleaning filter comprises a pipe body and an annular filter screen, a bottom plate is coaxially fixed at one end of the annular filter screen, a water guide column is arranged on one side of the bottom plate, one end of the annular filter screen is fixedly connected with the inner wall of the pipe body through a fixing ring, and a central column is coaxially arranged at the water inlet end of the pipe body; a spiral flow channel is arranged between the central column and the inner wall of the pipe body, a slag discharging opening and a slag discharging pipe are arranged on the bottom plate, one end of the slag discharging pipe is communicated with the slag discharging opening, the other end of the slag discharging pipe penetrates through the pipe body and then is located outside the pipe body, and a cleaning mechanism is further arranged in the pipe body. Through cooperation of the spiral flow channel, the water guide column, the annular filter screen and the cleaning mechanism, the automatic cleaning of the annular filter screen is synchronously realized in the fluid filtering process, so that the filtering effect of the annular filter screen is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline filters, and in particular to a self-cleaning filter and a check valve. Background Art

[0002] A check valve is a valve whose opening and closing part is a circular disc and which relies on its own weight and medium pressure to produce movement to block the backflow of the medium. It is an automatic valve and is also called a non-return valve, one-way valve, reflux valve or isolation valve. The disc movement mode is divided into lifting type and swing type.

[0003] In related technologies, when a check valve is used in a liquid flow line or hydraulic pump, a filter element, such as a screen or mesh, is typically integrated directly into the valve inlet to prevent particulate matter in the liquid from entering the valve body. This filter element, in turn, will inevitably accumulate filter residue over time. Excessive accumulation of filter residue can reduce the filter element's filtration efficiency or even block it, necessitating cleaning.

[0004] However, in the existing device, when cleaning the filter element, it is necessary to first block the leakage through other valves, and then the staff will remove and replace the filter element, and then clean the filter element. The operation is relatively cumbersome and there is room for improvement. Summary of the Invention

[0005] In order to achieve automatic cleaning of the filter element during use, thereby reducing the possibility of the filter element being blocked and extending the replacement cycle of the filter element, the present application provides a self-cleaning filter and a check valve.

[0006] In a first aspect, the present application provides a self-cleaning filter, which adopts the following technical solution: The filter screen is coaxially arranged on the filter screen, and a bottom plate is coaxially fixed to the filter screen at one end of the filter screen away from the water inlet of the filter screen, and a water guide column is provided on the side of the bottom plate facing the water inlet of the filter screen, and a water guide cavity is formed between the outer wall of the water guide column and the inner wall of the filter screen. The filter screen is connected with the water inlet of the filter screen to form a water guide cavity. The filter screen is connected with the water guide cavity through the filter holes on the annular filter screen.

[0007] By adopting the above technical solution, when in use, the water flow is guided by the spiral flow channel, so that the water flow spirals into the filter chamber and flows into the filter chamber under the action of the water guide column. At the same time, since the spirally flowing water flow itself has a certain centrifugal force and tangential force, the water flow is thrown toward the annular filter screen during the rotation, so that the filter residue in the water flow is intercepted and filtered by the annular filter screen, and the filtered water flow enters the water guide chamber from the side of the annular filter screen. The filter residue in the filter chamber enters the slag discharge pipe through the slag discharge port under the flushing action of the spirally flowing water flow and the cleaning of the cleaning mechanism, and is finally discharged to the outside of the pipe body along the slag discharge pipe. The overall use is simple and convenient, and the blockage of the annular filter screen is reduced by automatically cleaning the annular filter screen, thereby extending the replacement cycle of the annular filter screen.

[0008] Preferably, the end of the water guide column facing the water inlet of the pipe body is arranged in a conical shape, and the end of the water guide column with a smaller diameter faces the water inlet of the pipe body.

[0009] By adopting the above technical solution, when in use, the setting of the conical structure is more conducive to guiding the water flowing out of the spiral flow into the filter cavity.

[0010] Preferably, the water guide column rotates on the base plate, and the cleaning mechanism includes a first brush fixed on the base plate for cleaning the side wall of the water guide column, a second brush fixed on the water guide column for cleaning the inner wall of the annular filter, and a first driving structure arranged in the tube body for driving the water guide column to rotate.

[0011] By adopting the above technical solution, when in use, the water guide column is driven to rotate by the first driving structure, so that during the rotation of the water guide column, the side wall of the water guide column is cleaned by the first brush, and the second brush is driven to clean the inner wall of the annular filter screen, and then combined with the spiral flow of water to flush, the purpose of cleaning the annular filter screen and the outer wall of the water guide column can be achieved, thereby preventing the filter residue from blocking the annular filter screen, resulting in a reduction in the filtering effect of the annular filter screen.

[0012] Preferably, the first driving structure includes a plurality of spiral blades fixed on the conical surface of the water guide column, the plurality of spiral blades are evenly distributed along the circumference of the water guide column, and the rotation direction of the spiral blades matches the spiral flow channel.

[0013] By adopting the above technical solution, when in use, the water flow is guided to remain through the spiral flow channel, so that the water flow spirals into the filter chamber. At the same time, the spirally flowing water impacts the spiral blades, which can drive the water guide column to rotate, thereby achieving the purpose of automatically cleaning the annular filter during the filtration process of the water flow.

[0014] Preferably, the water guide column is fixed on the base plate, and the cleaning mechanism includes several third brushes rotatably arranged in the filter chamber for cleaning the side walls of the water guide column or the inner wall of the annular filter, a second driving structure arranged in the tube body for driving the third brush to rotate, and an automatic adjustment structure arranged in the tube body for adjusting the cleaning object of the third brush, and several third brushes are evenly spaced around the water guide column.

[0015] By adopting the above technical solution, when in use, in the initial state, the third brush is in contact with the side wall of the water guide column. At this time, when the third brush is driven to rotate by the second driving structure, the side wall of the water guide column can be cleaned. During the rotation of the third brush, the position of the third brush is adjusted by the automatic adjustment structure so that the third brush is in contact with the inner wall of the annular filter. At this time, the rotation of the third brush can clean the annular filter. Combined with the flushing effect of the spiral flow of water, the annular filter can be automatically cleaned. The overall use is simple and convenient.

[0016] Preferably, the second driving structure includes a rotating column rotating at the end of the water guide column away from the bottom plate, a connecting rod arranged on the rotating column, and a driving blade fixed on the connecting rod. The number of the connecting rods is the same as the number of the third brushes and the setting positions correspond one to one. The third brush is arranged at the end of the connecting rod away from the rotating column.

[0017] By adopting the above technical solution, when in use, the spiral flow channel guides the flow direction of water, so that the water flow entering the filter chamber has a tangential force, and the spiral flow of water can flush the driving blades to achieve the purpose of driving the third brush to rotate.

[0018] The cam is fixedly mounted on the driving member for carrying out the rotation of the steering column, and the cam is fixedly mounted on the steering column to control the steering column to move the steering column upwards and downwards to move the steering column downwards.

[0019] When the water filter is in the water, the water filter is cleaned by the third brush and the water filter is moved along the guide rail, thereby cleaning the water filter.

[0020] Preferably, a slag storage box is fixed outside the tube body, and one end of the slag discharge pipe outside the tube body extends into the slag storage box. The slag storage box is also provided with a sealing head for sealing the slag discharge pipe and a third driving structure for driving the sealing head out of the slag discharge pipe.

[0021] By adopting the above technical solution, when in use, through the cooperation of the slag storage box, the sealing head and the third drive structure, it is convenient for the staff to discharge the filter residue in the slag discharge pipe out of the pipe body in time, and it is more convenient for the staff to clean the filter residue, making it more convenient to use.

[0022] In a second aspect, the present application provides a check valve, which adopts the following technical solution: A check valve comprises a valve body, wherein a water inlet of the valve body is connected to a water outlet of a filter, and a water outlet of the valve body is connected to an external pipeline.

[0023] By adopting the above technical solution, when in use, impurities in the water flow can be intercepted and filtered by the filter, thereby reducing the situation where the valve body is damaged due to impurities in the water flow entering the valve body, and ensuring the service life of the valve body.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. The water flow is guided by the spiral flow channel, and under the action of the water guide column, the water flow spirals into the filter chamber. At the same time, since the spiral flow of water itself has a certain centrifugal force and tangential force, the water flow is thrown towards the annular filter during the rotation, thereby intercepting and filtering the filter residue in the water flow through the annular filter. The filtered water flows into the water guide chamber from the side of the annular filter. The filter residue in the filter chamber is flushed by the spiral flow of water and cleaned by the cleaning mechanism, enters the slag discharge pipe through the slag discharge port, and is finally discharged to the outside of the pipe body along the slag discharge pipe. The overall use is simple and convenient, and the automatic cleaning of the annular filter reduces its blockage, thereby extending the replacement cycle of the annular filter. 2. By using the spiral flow of water to impact the spiral blades, driving the water guide column to rotate, and then cooperating with the first brush and the second brush, the purpose of automatically cleaning the annular filter can be achieved during the process of filtering the water flow. It is simple and convenient to use; 3. By setting up the slag storage box, the plugging head and the third driving structure, it is convenient for the staff to discharge the filter residue in the pipe body, thereby further ensuring the filtering effect of the annular filter screen and reducing the number of times the annular filter screen needs to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an axonometric diagram mainly showing the overall structure in Example 1 of the present application; Figure 2 This is a cross-sectional view mainly showing the filter structure in Example 1 of the present application; Figure 3 This is a schematic diagram mainly showing the installation state of the cleaning mechanism in the first embodiment of the present application; Figure 4 This is an exploded view mainly showing the third driving structure in the first embodiment of the present application; Figure 5 This is a cross-sectional view mainly showing the filter structure in the second embodiment of the present application; Figure 6 This is a schematic diagram mainly showing the structure of the driving blade in the second embodiment of the present application; Figure 7 This is a schematic diagram mainly showing the automatic adjustment structure in the second embodiment of the present application.

[0026] Figure 1: 1. tube body; 2. annular filter screen; 21. bottom plate; 22. fixing ring; 23. filter chamber; 24. water guide chamber; 25. support rod; 3. water guide column; 4. center column; 5. spiral flow channel; 6. slag outlet; 7. slag discharge pipe; 8. cleaning mechanism; 81. first brush; 82. second brush; 83. first driving structure; 831. spiral blade; 84. third brush; 85. second driving structure; 851. rotating column; 852. connecting rod Rod; 853, driving blade; 86, automatic adjustment structure; 861, cylinder; 862, sliding rod; 863, return spring; 864, guide ring; 865, rotating rod; 866, limit rod; 867, abutment ring; 868, protrusion; 869, guide slope; 9, slag storage box; 10, sealing head; 20, third driving structure; 201, screw rod; 202, internal threaded tube; 203, pull-down spring; 204, handwheel; 30, valve body. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 -Attached Figure 7 This application is described in further detail.

[0028] The embodiments of the present application disclose a self-cleaning filter and a check valve.

[0029] Example 1: Reference Figure 1 A check valve includes a horizontally placed valve body 30. In this embodiment, the left end of the valve body 30 is set as the water inlet end, and the right end of the valve body 30 is set as the initial end. The water inlet end flange of the valve body 30 is connected to a self-cleaning filter, and the initial end of the valve body 30 is used to connect to the external pipeline.

[0030] Reference Figure 1 and Figure 2 A self-cleaning filter comprises a horizontally placed tube body 1 and an annular filter screen 2 arranged in the tube body 1. The annular filter screen 2 is coaxially arranged with the tube body 1, and a fixing ring 22 is welded and fixed at the left end of the annular filter screen 2. The annular filter screen 2 is coaxially connected to the tube body 1 through the fixing ring 22. The right end of the annular filter screen 2 is integrally formed with a bottom plate 21, which blocks the inner channel of the annular filter screen 2, that is, the right end of the annular filter screen 2 is suspended in the tube body 1. In actual use, one or several support rods 25 can also be welded and fixed on the right side of the bottom plate 21, so that the right end of the annular filter screen 2 is supported at the central axis of the tube body 1 by the support rod 25.

[0031] Reference Figure 2 and Figure 3A water guide column 3 is provided on the left side of the bottom plate 21. In this embodiment, the right end of the water guide column 3 is rotatably connected to the bottom plate 21. The left end of the water guide column 3 extends out of the annular filter screen 2, and the part of the water guide column 3 extending out of the annular filter screen 2 is conical, with the end with a smaller diameter facing the water inlet of the pipe body 1. A filter cavity 23 is formed between the outer wall of the right end of the water guide column 3 and the annular filter screen 2, and a water guide cavity 24 is formed between the outer wall of the annular filter screen 2 and the inner wall of the pipe body 1. The filter cavity 23 and the water guide cavity 24 are connected through the filter holes on the annular filter screen 2. In this embodiment, in order to facilitate the discharge of water in the water guide cavity 24, the area of the pipe body 1 corresponding to the setting of the annular filter screen 2 is funnel-shaped, and the inner diameter of the pipe body 1 increases first and then decreases from left to right.

[0032] Reference Figure 2 and Figure 3 , a center column 4 is coaxially arranged at the left end of the tube body 1, and a spiral flow channel 5 is formed between the outer wall of the center column 4 and the inner wall of the tube body 1, the right end of the spiral flow channel 5 is connected to the filter chamber 23, and a slag discharge port 6 is also opened on the bottom plate 21. A slag discharge pipe 7 is fixedly connected to the right side of the bottom plate 21, the left end of the slag discharge pipe 7 is connected to the slag discharge port 6, and the right end of the slag discharge pipe 7 extends out of the tube body 1. When in use, water flows into the spiral flow channel 5 from the left end of the tube body 1. Under the guidance of the spiral flow channel 5, the water flows spirally into the filter chamber 23. In this process, the spiral rotation and tangential force of the water flow can achieve the effect of flushing the outer wall of the water guide column 3 and the inner wall of the annular filter screen 2, thereby flushing the filter residue with weak adhesion on the annular filter screen 2 and the water guide column 3 to the slag discharge port 6 and into the slag discharge pipe 7.

[0033] Reference Figure 2 and Figure 3 In order to ensure that the filter residue with strong adhesion on the annular filter screen 2 and the water guide column 3 can also be flushed into the slag discharge port 6 by the spiral flowing water, a cleaning mechanism 8 is also provided in the pipe body 1. The cleaning mechanism 8 is used to cooperate with the flushing of the water flow to clean the annular filter screen 2 and the water guide column 3.

[0034] Reference Figure 2 and Figure 3 The cleaning mechanism 8 includes a first brush 81, a second brush 82 and a first driving structure 83, wherein the right end of the first brush 81 is fixed on the bottom plate 21, the left end of the first brush 81 is suspended in the filter chamber 23, and the axis of the first brush 81 is parallel to the axis of the water guide column 3, the hair surface of the first brush 81 abuts against the outer wall of the water guide column 3 located in the filter chamber 23, the second brush 82 is arranged as a whole in the filter chamber 23, and the hair surface of the second brush 82 abuts against the inner wall of the annular filter screen 2, the left end of the second brush 82 is fixedly connected to the water guide column 3 through a C-shaped connecting rod 852 structure, and the first driving structure 83 is arranged in the tube body 1, and the first driving structure 83 is used to drive the water guide column 3 to rotate.

[0035] Reference Figure 2 and Figure 3 The first driving structure 83 is composed of a plurality of spiral blades 831, and the plurality of spiral blades 831 are evenly spaced and arranged on the conical surface of the water guide column 3. The rotation direction of the spiral blades 831 matches the rotation direction of the spiral flow channel 5, that is, in this embodiment, the plurality of spiral blades 831 and the water guide column 3 are combined to form an impeller structure; when in use, the water flow in the spiral flow channel 5 impacts the spiral blades 831, thereby driving the spiral blades 831 to rotate, thereby achieving the purpose of driving the water guide column 3 to rotate. When the water guide column 3 rotates, the outer wall of the water guide column 3 can be cleaned by the first brush 81. At the same time, the rotation of the water guide column 3 synchronously drives the second brush 82 to rotate, thereby achieving the purpose of cleaning the inner wall of the annular filter screen 2, and then combined with the spiral scouring force of the water flow in the filter chamber 23, the purpose of automatically cleaning the annular filter screen 2 can be achieved.

[0036] Reference Figure 2 In addition, in order to facilitate the staff to clean the filter residue flowing out of the slag discharge pipe 7, a slag storage box 9 is welded and fixed on the outer wall of the pipe body 1, and the end of the slag discharge pipe 7 located outside the pipe body 1 extends into the slag storage box 9, and a blocking head 10 and a third driving structure 20 are also provided in the slag storage box 9. The blocking head 10 is used to block the end of the slag discharge pipe 7 extending into the slag storage box 9, and the third driving structure 20 is used to drive the blocking head 10 to separate from the slag discharge pipe 7, thereby connecting the slag discharge pipe 7 with the slag storage box 9. At the same time, a cleaning port is also provided on the slag storage box 9 for the staff to clean the internal filter residue, and an opening and closing door is installed at the cleaning port.

[0037] Reference Figure 2 and Figure 4 The slag storage box 9 is provided with a layer plate, which divides the slag storage box 9 into two layers. The third driving structure 20 includes a screw rod 201 rotatably arranged on the slag storage box 9, an internal threaded tube 202 that slides on the layer plate in the vertical direction, and a pull-down spring 203 sleeved on the outside of the internal threaded tube 202. The outer wall of the internal threaded tube 202 is provided with a key block for preventing itself from rotating. A key slot is correspondingly provided on the layer plate, and the key block slides in the key slot. The screw rod 201 and the internal threaded tube 202 are coaxially arranged just below the slag discharge pipe 7, and the upper end of the internal threaded tube 202 abuts against the bottom end of the sealing head 10, and the lower end of the internal threaded tube 202 is threadedly matched with the upper end of the screw rod 201, the upper end of the pull-down spring 203 is fixedly connected to the bottom end of the sealing head 10, and the bottom end of the pull-down spring 203 is fixedly connected to the layer plate. After the bottom end of the screw rod 201 passes through the slag storage box 9, a handwheel 204 is provided.

[0038] Reference Figure 2 and Figure 4When in use, the setting of the slag storage box 9 allows the discharged filter residue to be directly collected in a closed space, avoiding secondary pollution; the layer plate provides a stable installation basis for the plugging head 10 and other components, ensuring that each component can work reliably in the predetermined position; the design of the screw rod 201, the internal threaded tube 202, and the pull-down spring 203 realizes the automatic opening and closing function of the plugging head 10, simplifies the operation process, and reduces the need for manual intervention, that is, when the top end of the internal threaded tube 202 abuts the plugging head 10 until the plugging head 10 blocks the slag discharge pipe 7, when the staff cleans the slag storage box 9, the filter residue and part of the waste water can be prevented from continuing to be discharged from the slag discharge pipe 7, affecting the staff's cleaning work; when cleaning is completed, the internal threaded tube 202 can be moved downward by rotating the screw rod 201, so that the filter residue in the slag discharge pipe 7 can be discharged into the slag storage box 9.

[0039] Reference Figure 2 and Figure 4 In the present application, by using the screw rod 201, the internal threaded tube 202 and the pull-down spring 203 in conjunction with each other, it is ensured that the sealing head 10 can be accurately docked or separated with the slag discharge pipe 7 during the process of pushing or pulling the sealing head 10; this design not only improves the convenience and reliability of operation, but also effectively prevents leakage problems caused by poor sealing, thereby ensuring the stable operation of the system. The handwheel 204 driving method can be replaced by an electric drive device such as a drive motor in other embodiments.

[0040] The implementation principle of the embodiment of the present application is as follows: when in use, the external water source flows into the spiral flow channel 5 from the water inlet of the pipe body 1. Under the guidance of the spiral flow channel 5, the spiral impacts the spiral blade 831 of the water guide column 3, thereby causing the water guide column 3 to rotate. During the rotation of the water guide column 3, the water spiral enters the filter chamber 23 and is thrown toward the inner wall of the annular filter 2, thereby filtering the filter residue in the water flow through the annular filter 2. The filtered water enters the water inlet of the check valve from the water guide chamber 24, and part of the filter residue enters the discharge port 6 under the spiral flushing of the subsequent water flow, and the other part adheres to the filter. On the outer wall of the water guide column 3 or the annular filter screen 2; at the same time, the rotation of the water guide column 3 will also synchronously drive the second brush 82 to rotate, and then the outer wall of the rotating water guide column 3 can be cleaned by the first brush 81, and the inner wall of the annular filter screen 2 can be cleaned by the second brush 82, so as to achieve the purpose of automatically cleaning the annular filter screen 2 during the filtration process, thereby reducing the occurrence of filter residue adhering to the annular filter screen 2, and then ensuring the filtration effect of the annular filter screen 2 during long-term use, reducing the number of replacement times of the annular filter screen 2, and extending the replacement cycle of the annular filter screen 2.

[0041] The difference between Example 2 and Example 1 is that: Reference Figure 5 and Figure 6In this embodiment, the right end of the water guide column 3 is fixed on the base plate 21, and the cleaning mechanism 8 is composed of a third brush 84, a second driving structure 85 and an automatic adjustment structure 86, wherein a plurality of third brushes 84 are provided, and the plurality of third brushes 84 are evenly spaced and arranged in the filter chamber 23. The third brush 84 is used to clean the outer wall of the water guide column 3 or the inner wall of the annular filter 2. In this embodiment, the third brush 84 is preferably provided in two groups, and the second driving structure 85 and the automatic adjustment structure 86 are both provided in the area between the central column 4 and the water guide column 3. The second driving structure 85 is used to drive the third brush 84 to rotate, and the automatic adjustment structure 86 is used to drive the cleaning object of the third brush 84.

[0042] Reference Figure 5 and Figure 6 When in use, in the initial state, the bristle surfaces of the two groups of third brushes 84 are both in contact with the outer wall of the water guide column 3. At this time, the second driving structure 85 drives the third brush 84 to rotate, and the outer wall of the water guide column 3 can be cleaned by the third brush 84; after the third brush 84 rotates a specified number of times, the position of the third brush 84 is adjusted by the automatic adjustment structure 86, so that the bristle surface of the third brush 84 is in contact with the inner wall of the annular filter 2. At this time, the inner wall of the annular filter 2 can be cleaned by rotating the second driving structure 85.

[0043] Reference Figure 5 and Figure 6 The second driving structure 85 includes a rotating column 851, a connecting rod 852 and a driving blade 853. The rotating column 851 is rotatably connected to the left end of the water guide column 3. The number of connecting rods 852 is the same as the number of third brushes 84 and the positions are set one-to-one. One end of the connecting rod 852 is hinged to the left end of the rotating column 851, and the other end of the connecting rod 852 is fixedly connected to the third brush 84. A torsion spring is provided on the hinge axis of the connecting rod 852 and the rotating column 851. The torsion spring is used to ensure that the third brush 84 abuts against the outer wall of the water guide column 3 without being affected by external force. The number of driving blades 853 is the same as the number of connecting rods 852 and the positions are set one-to-one. The driving blades 853 are fixed on the connecting rod 852.

[0044] Reference Figure 5 and Figure 6 In this embodiment, the driving blade 853 is set to be flat. In other embodiments, the driving blade 853 can also be set to be spiral. The setting of the driving blade 853 needs to be coordinated with the spiral flow channel 5, that is, when the water flows out of the spiral flow channel 5, it impacts the driving blade 853, thereby driving the driving blade 853, the connecting rod 852, the rotating column 851 and the third brush 84 to rotate.

[0045] Reference Figure 5 and Figure 7The automatic adjustment structure 86 includes a cylinder 861, a sliding rod 862, a return spring 863, a guide ring 864, a rotating rod 865 and a contact ring 867. The right end of the cylinder 861 is fixed on the bottom plate 21, the left end of the cylinder 861 is coaxially connected to the sliding rod 862, the right end of the sliding rod 862 slides on the cylinder 861 along its own axial direction, the left end of the sliding rod 862 is rotatably connected to the rotating column 851, the return spring 863 is sleeved on the sliding rod 862, and one end of the return spring 863 is connected to the cylinder 861. The left end face is abutted, the other end of the return spring 863 is abutted against the right end face of the rotating column 851, the left end face of the guide ring 864 is coaxially fixed on the right end face of the center column 4, the right end face of the guide ring 864 is set toward the water guide column 3, and a protrusion 868 is integrally formed on the right end face of the guide ring 864, and a guiding inclined surface 869 is provided between the arc-shaped ends of the protrusion 868 and the end face of the guide ring 864. One end of the rotating rod 865 is fixed to the rotating column 851, and the other end of the rotating rod 865 is abutted against the right end face of the guide ring 864.

[0046] Reference Figure 5 and Figure 7 , the abutment ring 867 is coaxially fixed on the conical surface of the water guide column 3, and the side wall of the driving blade 853 is in abutment with the abutment ring 867; when in use, when the rotating column 851 rotates, the rotating rod 865 is driven to move on the end surface of the guide ring 864. When the rotating rod 865 moves from the end surface of the guide ring 864 to the guide inclined surface 869 and gradually moves to the protrusion 868, the rotating rod 865, the rotating column 851 and the sliding part are driven to move. The shift rod 862 slides synchronously toward the end close to the bottom plate 21. During the sliding process of the rotating column 851, the return spring 863 is compressed. At the same time, the abutment limit of the connecting rod 852 by the abutment ring 867 causes one end of the connecting rod 852 with the third brush 84 to rotate and tilt, so that the hair surface of the third brush 84 is separated from the outer wall of the water guide column 3 and adheres to the inner wall of the annular filter 2. At this time, the rotating rod 865 rotates on the protrusion 868, so that the third brush 84 can clean the inner wall of the annular filter 2.

[0047] Reference Figure 5 and Figure 7 When the rotating rod 865 moves from the protrusion 868 to the end face of the guide ring 864, under the action of the reset spring 863 and the torsion spring, the rotating column 851 and the connecting rod 852 return to their initial state, thereby continuing to clean the inner wall of the water guide column 3.

[0048] Reference Figure 5 and Figure 7In addition, in order to prevent the rotating rod 865 from being deformed due to the long-term flushing of water flow, thereby causing the end of the rotating rod 865 to detach from the guide ring 864, in this embodiment, two limit rods 866 are further connected to the rotating rod 865. The two limit rods 866 are located on both sides of the rotating rod 865, and one of the limit rods 866 abuts against the inner wall of the guide ring 864, and the other limit rod 866 abuts against the outer wall of the guide ring 864. That is, during the rotation of the rotating rod 865, the two limit rods 866 are used to guide and limit the moving direction of the rotating rod 865, thereby preventing the rotating rod 865 from detaching from the guide ring 864, resulting in the inability to adjust the cleaning position of the third brush 84.

[0049] Reference Figure 5 and Figure 7 In this embodiment, filter holes are provided at the left end and side walls of the center column 4, and the aperture of the filter hole on the left end face is larger than the aperture of the side wall. When in use, part of the water flow entering the tube body enters the center column 4 from the left end of the center column 4, and is discharged from the side wall of the center column 4 to the spiral flow channel 5. At this time, the impurities in the water flow can be preliminarily filtered through the two filter holes on the center column 4, thereby reducing the situation where large debris enters the filter chamber 23 and blocks the rotation of the driving blade 853.

[0050] The implementation principle of the embodiment of the present application is as follows: when in use, external water flows into the spiral flow channel 5 from the water inlet of the pipe body 1. Under the guidance of the spiral flow channel 5, the spiral impacts the driving blade 853, so that the driving blade 853 drives the rotating column 851 to rotate. During the rotation of the rotating column 851, on the one hand, the purpose of stirring the water flow in the pipe body 1 is achieved, thereby separating the filter residue in the water flow. On the other hand, the water spirally enters the filter chamber 23 and is thrown to the inner wall of the annular filter 2, thereby filtering the filter residue in the water flow through the annular filter 2. The filtered water enters the water inlet of the check valve from the water guide chamber 24. Part of the filter residue enters the residue discharge port 6 under the spiral flushing of the subsequent water flow, and the other part adheres to the outer wall or the outer wall of the water guide column 3. On the annular filter 2; at the same time, the rotation of the rotating column 851 will also synchronously drive the rotating rod 865 to rotate, and then under the guiding effect of the guide ring 864 on the rotating rod 865, combined with the abutment limit of the abutment ring 867 on the driving blade 853, the third brush 84 can be gradually separated from the outer wall of the water guide column 3 after rotating a certain number of circles, thereby fitting to the inner wall of the annular filter 2. At this time, the inner wall of the annular filter 2 can be rotated and cleaned by the third brush 84, and combined with the spiral flushing effect of the water flow, the purpose of automatically cleaning the annular filter 2 during the filtration process is achieved, thereby ensuring the filtration effect of the annular filter 2 during long-term use, reducing the number of replacement times of the annular filter 2, and extending the replacement cycle of the annular filter 2.

[0051] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A self-cleaning filter, characterized in that: The invention comprises a pipe body (1) and an annular filter screen (2) coaxially arranged in the pipe body (1); a bottom plate (21) is coaxially fixed to one end of the annular filter screen (2) facing away from the water inlet of the pipe body (1); a water guide column (3) is arranged on the side of the bottom plate (21) facing the annular filter screen (2); a filter cavity (23) is formed between the outer wall of the water guide column (3) and the inner wall of the annular filter screen (2); a fixing ring (22) is coaxially fixed to one end of the annular filter screen (2) facing the water inlet of the pipe body (1); the fixing ring (22) is fixedly connected to the inner wall of the pipe body (1); a water guide cavity (24) is formed between the outer wall of the annular filter screen (2) and the inner wall of the pipe body (1); The filter chamber (23) and the water guide chamber (24) are connected through the filter holes on the annular filter screen (2); a central column (4) is coaxially arranged at the water inlet end of the tube body (1); a spiral flow channel (5) is arranged between the central column (4) and the inner wall of the tube body (1); the spiral flow channel (5) guides the water flow to spirally enter the filter chamber (23); a slag discharge port (6) and a slag discharge pipe (7) are arranged on the bottom plate (21); one end of the slag discharge pipe (7) is connected to the slag discharge port (6); the other end of the slag discharge pipe (7) passes through the tube body (1) and is located outside the tube body (1); a cleaning mechanism (8) for cleaning filter residue in the filter chamber (23) is also arranged in the tube body (1).

2. A self-cleaning filter according to claim 1, characterized in that: One end of the water guide column (3) facing the water inlet of the pipe body (1) is arranged in a conical shape, and the end of the water guide column (3) with a smaller diameter faces the water inlet of the pipe body (1).

3. A self-cleaning filter according to claim 2, characterized in that: The water guide column (3) rotates on the bottom plate (21), and the cleaning mechanism (8) comprises a first brush (81) fixed on the bottom plate (21) for cleaning the side wall of the water guide column (3), a second brush (82) fixed on the water guide column (3) for cleaning the inner wall of the annular filter (2), and a first driving structure (83) arranged in the pipe body (1) for driving the water guide column (3) to rotate.

4. A self-cleaning filter according to claim 3, characterized in that: The first driving structure (83) comprises a plurality of spiral blades (831) fixed on the conical surface of the water guide column (3), wherein the plurality of spiral blades (831) are evenly distributed along the circumference of the water guide column (3), and the rotation direction of the spiral blades (831) matches the spiral flow channel (5).

5. The self-cleaning filter according to claim 2, characterized in that: The water guide column (3) is fixed on the bottom plate (21), and the cleaning mechanism (8) includes a plurality of third brushes (84) rotatably arranged in the filter chamber (23) for cleaning the side wall of the water guide column (3) or the inner wall of the annular filter (2), a second driving structure (85) arranged in the tube body (1) for driving the third brush (84) to rotate, and an automatic adjustment structure (86) arranged in the tube body (1) for adjusting the cleaning object of the third brush (84), and a plurality of the third brushes (84) are evenly spaced and arranged on the circumference of the water guide column (3).

6. A self-cleaning filter according to claim 5, characterized in that: The second driving structure (85) comprises a rotating column (851) rotating at one end of the water guide column (3) away from the bottom plate (21), a connecting rod (852) arranged on the rotating column (851), and a driving blade (853) fixed on the connecting rod (852), the number of the connecting rods (852) being the same as the number of the third brushes (84) being arranged and the arrangement positions being one-to-one corresponding, and the third brush (84) being arranged at one end of the connecting rod (852) away from the rotating column (851).

7. A self-cleaning filter according to claim 6, characterized in that: The automatic adjustment structure (86) includes a cylinder (861) coaxially fixed on the bottom plate (21), a sliding rod (862) axially slidingly arranged on the cylinder (861), a return spring (863) arranged between the sliding rod (862) and the rotating column (851), a guide ring (864) coaxially fixed on the center column (4) toward one end of the water guide column (3), a rotating rod (865) fixed on the rotating column (851), and an abutment ring (867) coaxially arranged on the conical surface of the water guide column (3). One end of the sliding rod (862) is rotatably connected to the rotating column (851). The return spring (863) is arranged between the sliding rod (862) and the rotating column (851). 63) is in contact with the cylinder (861), the other end of the reset spring (863) is in contact with the rotating column (851), the driving blade (853) is in contact with the contact ring (867), the rotating rod (865) is in contact with the end face of the guide ring (864) toward the water guide column (3), the guide ring (864) is provided with a protrusion (868) toward the end face of the water guide column (3), and a guiding inclined surface (869) is provided between the two ends of the protrusion (868) and the end face of the guide ring (864), the connecting rod (852) is hinged to the rotating column (851), and a torsion spring is provided on the rotating shaft of the connecting rod (852) and the rotating column (851).

8. The self-cleaning filter according to claim 1, characterized in that: A slag storage box (9) is fixed outside the tube body (1), and one end of the slag discharge pipe (7) located outside the tube body (1) extends into the slag storage box (9). A plugging head (10) for plugging the slag discharge pipe (7) and a third driving structure (20) for driving the plugging head (10) to separate from the slag discharge pipe (7) are also provided in the slag storage box (9).

9. A check valve using the self-cleaning filter according to any one of claims 1 to 8, characterized in that: It comprises a valve body (30), the water inlet of the valve body (30) is communicated with the water outlet of the filter, and the water outlet of the valve body (30) is communicated with an external pipeline.

Images