Off-net self-cleaning filter and process thereof

Abstract

The invention discloses an off-grid self-cleaning filter and a process thereof, and belongs to the technical field of filters. The device comprises a sand storage tank and a rotational flow body, a controller is arranged on the outer surface of the rotational flow body, and a differential pressure switch is arranged at the bottom of the controller; a water inlet is formed in one side of the rotational flow body, a Y-shaped filter is arranged at a port of the water inlet, an upper pressing cover plate is arranged at the top of the rotational flow body, and a water outlet is formed in the center of the upper pressing cover plate; a wire winding pipe is arranged in the rotational flow body, a sand storage tank is arranged at the bottom of the rotational flow body, a switch diaphragm valve is connected to one side of the sand storage tank, and an electromagnetic valve is arranged on the switch diaphragm valve. The whole device is highly integrated, compared with a traditional centrifugal net type filter, the occupied area is small, the cost is low, the filtering and backwashing functions are achieved, the filtering precision is remarkably improved, an original steel pipe structure in a rotational flow body is replaced with the wire winding pipe, and the safety and stability of the device are improved.

Description

Technical Field

[0001] The invention relates to the technical field of filters, and more particularly to an off-grid self-cleaning filter and a process thereof. Background Art

[0002] In the prior art, the commonly used centrifugal filter can only filter large particles of impurities. If fine filtration is required, a mesh filter must be added to the rear end of the filter. If automatic backwashing is required, a control system must be added while a motor and a reducer must be equipped. A PLC control system is required, and a three-way valve must be added. The cost of backwashing is too high. At the same time, in the prior art, centrifugal filters mostly use ordinary mesh structures. Impurities on the mesh filters are accumulated and form a fast structure, which cannot achieve a good impurity removal effect. In addition, the existing centrifugal mesh combination filters generally occupy a large area, use many accessories, and are inconvenient to use. Summary of the invention

[0003] 1. Technical problem to be solved by the invention

[0004] In view of the defects and shortcomings of the prior art, the present invention provides an off-grid self-cleaning filter and a process thereof. The present invention is highly integrated as a whole. Compared with traditional centrifugal mesh filters, it occupies a small area and has low cost. It has both filtering and backwashing functions, significantly improves the filtering accuracy, and replaces the original steel pipe structure inside the cyclone fluid with a wire-wound tube, thereby improving the safety and stability of the equipment.

[0005] 2. Technical solution

[0006] In order to achieve the above object, the technical solution provided by the present invention is:

[0007] An off-grid self-cleaning filter of the present invention comprises a sand storage tank and a cyclone fluid, wherein a controller is arranged on the outer surface of the cyclone fluid, and a differential pressure switch is arranged at the bottom of the controller;

[0008] A water inlet is provided on one side of the cyclone body, a Y-type filter is provided at the port of the water inlet, an upper pressure cover plate is provided on the top of the cyclone body, and a water outlet is provided at the center of the upper pressure cover plate;

[0009] The interior of the cyclone fluid is provided with a wire winding tube, the bottom of the cyclone fluid is provided with a sand storage tank, one side of the sand storage tank is connected with a switch diaphragm valve, and the switch diaphragm valve is provided with a solenoid valve;

[0010] A high-pressure interface and a low-pressure interface are respectively provided at the bottom of the differential pressure switch. The input end of the high-pressure interface is connected to one end of the Y-type filter through the water inlet high-pressure command pipe, the output end of the high-pressure interface is connected to the solenoid valve through the water inlet high-pressure command pipe, and one end of the low-pressure interface is connected to the upper pressure cover plate through the water outlet low-pressure command pipe.

[0011] Furthermore, pressure gauges are provided on the pipes of the water outlet and the water inlet.

[0012] Furthermore, an observation hole is provided on the surface of the cyclone body, and an observation hole high-pressure glass is installed on the surface of the observation hole. The observation hole high-pressure glass is assembled with the cyclone body through an observation hole pressure plate.

[0013] Furthermore, a lower fixing ring is provided at the bottom of the wire winding tube;

[0014] The lower fixing ring is composed of an outer support, square ribs, a lower fixing ring and a rubber pad. The lower fixing ring is arranged at the center of the outer support. The outer ring of the lower fixing ring is arranged with square ribs at intervals. The two ends of the square ribs are respectively fixed to the outer support and the lower fixing ring. A rubber pad is arranged at the center of the lower fixing ring. A large-area fan-shaped sand falling opening is formed between the lower fixing ring, the square ribs and the outer support.

[0015] Furthermore, an upper fixing ring is provided at the bottom of the upper pressure cover plate, and the upper and lower ends of the wire winding tube are respectively fixed to the inner rings of the upper fixing ring and the lower fixing ring;

[0016] The outer rings of the upper fixing ring and the lower fixing ring are both provided with nylon rings.

[0017] Furthermore, the outer ring of the wire winding tube is provided with an impeller disk, and the upper and lower ends of the impeller disk are respectively installed on the outside of the nylon ring, and gaps are left between the impeller disk and the nylon ring in the axial and radial directions.

[0018] Furthermore, the impeller disk comprises a fixed disk, spiral blades and a nylon brush, the outer ring of the fixed disk is provided with spiral blades at intervals, and the inner ring of the fixed disk is provided with nylon brushes at intervals;

[0019] A nylon brush lower fixing plate is arranged on the outer side of the lower end of the nylon brush, a fixed lower wedge iron is arranged at the bottom of the nylon brush, and an elastic pressing mechanism is also arranged at the bottom of the nylon brush;

[0020] The upper end of the nylon brush is provided with a nylon brush upper fixing plate, the top of the nylon brush is provided with a movable upper wedge iron, the upper end of the movable upper wedge iron is provided with an adjusting fixing block, and the adjusting fixing block is provided with an adjusting bolt.

[0021] Furthermore, the nylon brush upper fixing plate, the nylon brush lower fixing plate, the fixed lower wedge iron, and the adjusting fixing block are respectively welded on the fixing plate;

[0022] The upper fixing plate of the nylon brush is provided with a transverse waist-shaped hole, the lower fixing plate of the nylon brush is provided with an oblique waist-shaped hole, the upper end of the nylon brush is provided with a vertical waist-shaped hole, and the lower end of the nylon brush is provided with a through hole;

[0023] The upper and lower ends of the nylon brush are respectively assembled with the nylon brush upper fixing plate and the nylon brush lower fixing plate through fasteners;

[0024] By turning the adjusting bolt to move downward, the adjusting bolt pushes the movable upper wedge, causing the nylon brush to move toward the center of the fixed disk, and at the same time the movable upper wedge also squeezes the nylon brush to move downward.

[0025] Furthermore, the upper and lower ends of the nylon brush are provided with bevels, the bevel on the upper part of the nylon brush is installed in a movable upper wedge, and the bevel on the lower part of the nylon brush is installed in a fixed lower wedge.

[0026] A process for off-grid self-cleaning filter,

[0027] Including filtration status and backwash status:

[0028] The filtering state is as follows: when the equipment is working, the water source to be filtered passes through the water inlet and enters the straight section of the cyclone body. Under the action of the water flow, the impeller disc is driven to rotate. The nylon brush cleans the outer surface of the wire winding tube, brushing off the impurities attached to the outer surface of the wire winding tube. The large and small particles entering the equipment are directly guided to the conical section of the cyclone body through the impeller disc under the dual action of centrifugal force and gravity, and sink into the sand storage tank.

[0029] Impurities with lower density are isolated in the centrifugal cylinder by the wire winding tube and are in a suspended state; clear water passes through the gap of the wire winding tube and enters the water outlet of the filter;

[0030] The backwash state is:

[0031] When the filter equipment reaches the pressure difference or time setting, the controller gives a backwash instruction. According to the power-on sequence, the solenoid valve is first energized from the emptying state to the water supply state for the switch diaphragm valve;

[0032] The water passing through the solenoid valve is led out from the water inlet, passes through the Y-type filter designed at the water inlet, and supplies water to the switch diaphragm valve through the solenoid valve, and the switch diaphragm valve opens;

[0033] The equipment starts to discharge pollutants, and the large and small particles deposited at the bottom of the equipment are discharged from the sand storage tank under the action of water pressure; at this time, the pressure in the sand storage tank is negative pressure, and the impurities isolated inside by the wire winding tube and in a suspended state are also sucked into the sand storage tank and discharged by the switch diaphragm valve;

[0034] After the sewage discharge is completed, the solenoid valve is powered off and enters the emptying state. The water source that controls the opening of the switch diaphragm valve is discharged under the action of the spring, and the backwashing of the self-cleaning filter is completed.

[0035] 3. Beneficial effects

[0036] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0037] The present invention is highly integrated as a whole. Compared with the traditional centrifugal mesh filter, it occupies a small area, has low cost, and has both filtering and backwashing functions. The overall method of side water inlet and top water outlet ensures that the flow area is larger than the flow area of ​​the pipeline, which significantly improves the filtering accuracy. The original steel pipe structure inside the cyclone fluid is replaced with a wire-wound tube, which improves the safety and stability of the equipment. The wire-wound tube is integrated into the cyclone fluid. Through the integrated design, the overall connector structure of the centrifugal filter plus the mesh filter in the original design is replaced, which greatly improves the economy of the equipment.

[0038] The present invention utilizes the impact force of water flow to drive the impeller disk to rotate, so that the nylon brush cleans the outer periphery of the wire winding tube; impurities cannot be precipitated on the wire winding tube, and the passing speed of water flow is accelerated. Under the action of centrifugal force and gravity, larger particles and fine particles are directly guided to the conical section of the cyclone body through the spiral impeller and sink into the sand storage tank;

[0039] The overall equipment abandons the complex control system in the traditional sense, does not require a three-way valve, and uses a controller with an integrated pressure differential switch. At the same time, multiple devices can be controlled simultaneously by one controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is the overall structure diagram of the present invention;

[0041] Figure 2 It is a front view of the present invention;

[0042] Figure 3 A top view of the present invention;

[0043] Figure 4 It is a right side view of the present invention;

[0044] Figure 5 It is the filtering state diagram of the present invention;

[0045] Figure 6 For the present invention Figure 5 Sectional view along the water inlet;

[0046] Figure 7 It is a single device backwash state diagram of the present invention;

[0047] Figure 8 The internal structure diagram of the cyclone body of the present invention;

[0048] Fig. 9 It is a structural diagram of the upper pressure cover plate of the present invention;

[0049] Fig.10 It is the structural diagram of the nylon ring of the present invention;

[0050] Fig.11It is a structural diagram of the wire winding tube of the present invention;

[0051] Fig.12 It is the structural diagram of the impeller disk of the present invention;

[0052] Fig.13 It is a structural diagram of the lower fixing ring of the present invention;

[0053] Fig.14 It is the assembly diagram of the impeller disk of the present invention;

[0054] Fig.15 It is a partial planar structural diagram of the impeller disk of the present invention;

[0055] Fig.16 A top view of the impeller disk of the present invention;

[0056] Fig.17 For the present invention Fig.16 AA section view;

[0057] Fig.18 For the present invention Fig.14 A partial enlarged view of

[0058] Fig.19 This is a multi-device backwash state diagram of the present invention.

[0059] In the figure: 1. differential pressure switch; 101. high pressure interface; 102. low pressure interface; 2. upper pressure cover plate; 201. water outlet; 202. upper fixing ring; 203. nylon ring; 3. switch diaphragm valve; 4. solenoid valve; 5. sand storage tank; 6. cyclone body; 601. water inlet; 602. wire winding tube; 603. impeller disc; 6031. fixing disc; 6032. spiral blade; 6033. nylon brush; 6034. nylon brush upper fixing plate; 6035. nylon brush lower fixing plate ; 6036, fixed lower wedge; 6037, elastic clamping mechanism; 6038, movable upper wedge; 6039, adjustment fixing block; 60310, adjustment bolt; 7, controller; 8, pressure gauge; 9, Y-type filter; 10, observation hole high-pressure glass; 11, observation hole pressure plate; 12, lower fixing ring; 1201, outer support; 1202, square rib; 1203, lower fixing ring; 1204, rubber pad; 13, water inlet high-pressure command pipe; 14, water outlet low-pressure command pipe. DETAILED DESCRIPTION

[0060] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0061] Example 1

[0062] from Figure 1-7It can be seen that an off-grid self-cleaning filter of this embodiment includes a sand storage tank 5 and a cyclone 6, a controller 7 is provided on the outer surface of the cyclone 6, and a differential pressure switch 1 is provided at the bottom of the controller 7;

[0063] A water inlet 601 is provided on one side of the cyclone body 6, a Y-type filter 9 is provided at the port of the water inlet 601, an upper pressure cover plate 2 is provided on the top of the cyclone body 6, and a water outlet 201 is provided at the center of the upper pressure cover plate 2; the upper pressure cover plate 2 is large in size, which is convenient for installation and maintenance;

[0064] A wire winding tube 602 is arranged inside the cyclone 6, a sand storage tank 5 is arranged at the bottom of the cyclone 6, a switch diaphragm valve 3 is connected to one side of the sand storage tank 5, and a solenoid valve 4 is arranged on the switch diaphragm valve 3;

[0065] A high-pressure interface 101 and a low-pressure interface 102 are respectively provided at the bottom of the differential pressure switch 1. The input end of the high-pressure interface 101 is connected to one end of the Y-type filter 9 through the water inlet high-pressure command pipe 13, the output end of the high-pressure interface 101 is connected to the solenoid valve 4 through the water inlet high-pressure command pipe 13, and one end of the low-pressure interface 102 is connected to the upper pressure cover plate 2 through the water outlet low-pressure command pipe 14.

[0066] Pressure gauges 8 are provided on the pipelines of the water outlet 201 and the water inlet 601 .

[0067] An observation hole is provided on the surface of the cyclone body 6 , and an observation hole high-pressure glass 10 is installed on the surface of the observation hole. The observation hole high-pressure glass 10 is assembled with the cyclone body 6 through an observation hole pressure plate 11 .

[0068] An observation hole is provided at the straight section of the water inlet 601, and the observation hole is used to observe the working condition of the equipment, so as to better observe the use condition of the equipment.

[0069] The present invention arranges a switch diaphragm valve 3 below the sand storage tank 5. When the equipment working time or the pressure difference reaches the set parameters, the controller 7 gives an instruction to the solenoid valve 4, the solenoid valve 4 opens, and water is passed to the switch diaphragm valve 3, and the switch diaphragm valve 3 opens; the equipment enters the backwash state;

[0070] The present invention as a whole adopts the mode of water inlet from the side and water outlet from the top, ensuring that the flow area is greater than 1.5 times the flow area of ​​the pipeline, significantly improving the filtering accuracy, replacing the original steel pipe structure inside the cyclone body 6 with a wire-wound tube 602, improving the safety and stability of the equipment, and integrating the wire-wound tube 602 into the cyclone body 6. Through the integrated design, it replaces the overall connector structure of the centrifugal filter and the mesh filter in the original design, greatly improving the economy of the equipment.

[0071] The wire-wound tube 602 can be processed according to the use accuracy, and can meet the occasions where various types of filtering need to adjust the accuracy. The wire-wound tube 602 has higher rigidity and better stability, and can meet the needs of high pressure.

[0072] The opening size of the lower end of the cyclone 6 is more than twice the opening area of ​​a conventional centrifugal filter. The filtered water source enters from the side of the wire winding tube 602, which effectively eliminates the possibility of back suction. Impurities entering the conical section of the cyclone 6 will only sink into the sand storage tank 5.

[0073] There is no pressure difference between the cyclone 6 and the sand storage tank 5, which can provide better pressure during the sewage discharge process, and the sewage discharge is more thorough. Impurities with lower density are isolated in the centrifugal cylinder by the wire winding tube 602 and are in a suspended state. During backwashing, due to the large size of the lower opening of the cyclone 6, the conical section forms a negative pressure, which sucks the impurities with lower density out of the cylinder.

[0074] The overall device abandons the complex control system in the traditional sense, does not need to be configured with a three-way valve, and only uses a controller 7 with an integrated pressure difference switch 1. At the same time, multiple devices can be controlled simultaneously through one controller 7.

[0075] The present invention is highly integrated as a whole, and compared with the traditional centrifugal screen filter, it can reduce the floor space by 60% and the cost by 40%. For the self-cleaning filter, the cost is reduced by 50% while the floor space remains unchanged.

[0076] Example 2

[0077] from Figure 5-8 It can be seen that in the off-grid self-cleaning filter of this embodiment, a lower fixing ring 12 is provided at the bottom of the wire winding tube 602;

[0078] from Fig.13 It can be seen that the lower fixing ring 12 is composed of an outer support 1201, square ribs 1202, a lower fixing ring 1203 and a rubber pad 1204. The lower fixing ring 1203 is arranged at the center of the outer support 1201. The outer circle of the lower fixing ring 1203 is spaced apart with square ribs 1202. The two ends of the square ribs 1202 are respectively fixed to the outer support 1201 and the lower fixing ring 1203. A rubber pad 1204 is arranged at the center of the lower fixing ring 1203. A large-area fan-shaped sand-falling opening is formed among the lower fixing ring 1203, the square ribs 1202 and the outer support 1201, which will not block the mud and sand.

[0079] The square reinforcement 1202 can not only provide sufficient support, but also play the role of elastically supporting the wire winding tube 602, making assembly more convenient, requiring less machining accuracy for welding, and improving machining efficiency;

[0080] from Figure 9-12It can be seen that an upper fixing ring 202 is provided at the bottom of the upper pressure cover plate 2, and the upper and lower ends of the wire winding tube 602 are respectively fixed to the inner rings of the upper fixing ring 202 and the lower fixing ring 1203;

[0081] The wire winding tube 602 is fixed by means of the lower fixing ring 12 and the upper pressure cover plate 2. The center line of the wire winding tube 602 coincides with the center line of the cyclone 6 through the upper fixing ring 202 and the lower fixing ring 1203. A rubber pad 1204 with a thickness greater than the gap size of about 2 mm is installed in the lower fixing ring 12 for sealing, which plays a role of compression and increases friction.

[0082] The outer rings of the upper fixing ring 202 and the lower fixing ring 1203 are both provided with nylon rings 203 .

[0083] The outer ring of the wire winding tube 602 is provided with an impeller disk 603, and the upper and lower ends of the impeller disk 603 are respectively installed on the outside of the nylon ring 203. There are gaps in the axial and radial directions between the impeller disk 603 and the nylon ring 203. A fixed structure is not adopted in order to prevent the equipment from being stuck by impurities and preventing rotation, thereby achieving better rotation and cleaning effects.

[0084] from Figure 14-18 It can be seen that the impeller disc 603 includes a fixed disc 6031, spiral blades 6032 and a nylon brush 6033. The outer ring of the fixed disc 6031 is provided with spiral blades 6032 at intervals, and the inner ring of the fixed disc 6031 is provided with nylon brushes 6033 at intervals.

[0085] The spiral blade 6032 adopts a spiral structure, which has the advantages of preventing water flow from generating a large stress concentration on the root of the blade during long-term scouring, which may cause the risk of breakage. The spiral direction of the blade is consistent with the downward direction of the water flow, which plays a role in guiding the particles, accelerating the particle impurities to enter the cyclone body and sink into the sand storage tank 5. The angle of the blade must ensure that the impeller is evenly stressed at any angle.

[0086] A nylon brush lower fixing plate 6035 is arranged on the outer side of the lower end of the nylon brush 6033, a fixed lower wedge iron 6036 is arranged at the bottom of the nylon brush 6033, and an elastic pressing mechanism 6037 is also arranged at the bottom of the nylon brush 6033;

[0087] A nylon brush upper fixing plate 6034 is provided at the upper end of the nylon brush 6033 , a movable upper wedge 6038 is provided at the top of the nylon brush 6033 , an adjusting fixing block 6039 is provided at the upper end of the movable upper wedge 6038 , and an adjusting bolt 60310 is provided on the adjusting fixing block 6039 .

[0088] The nylon brush upper fixing plate 6034, the nylon brush lower fixing plate 6035, the fixing lower wedge 6036, and the adjusting fixing block 6039 are respectively welded on the fixing plate 6031;

[0089] The upper fixing plate 6034 of the nylon brush is provided with a transverse waist-shaped hole, the lower fixing plate 6035 of the nylon brush is provided with an oblique waist-shaped hole, the upper end of the nylon brush 6033 is provided with a vertical waist-shaped hole, and the lower end of the nylon brush 6033 is provided with a through hole;

[0090] The upper and lower ends of the nylon brush 6033 are respectively assembled with the nylon brush upper fixing plate 6034 and the nylon brush lower fixing plate 6035 through fasteners;

[0091] Both upper and lower ends of the nylon brush 6033 are provided with bevels. The bevel at the upper part of the nylon brush 6033 is installed in the movable upper wedge iron 6038, and the bevel at the lower part of the nylon brush 6033 is installed in the fixed lower wedge iron 6036.

[0092] By turning the adjusting bolt 60310 to move downward, the adjusting bolt 60310 pushes the movable upper wedge 6038, so that the nylon brush 6033 moves toward the center of the fixed disk 6031, and at the same time, the movable upper wedge 6038 also squeezes the nylon brush 6033 to move downward.

[0093] The nylon brush 6033 will wear out during long-term use. At this time, just open the upper pressure cover plate 2 and adjust the upper adjusting bolt 60310 to adjust the nylon brush 6033 to the wall of the wire winding tube 602. By adjusting, the service life of the accessory can be extended by 3 times. Adjusting the position of the nylon brush 6033 is more convenient and less costly than replacing the nylon brush 6033, thus saving the cost of equipment use and maintenance.

[0094] The impeller disc 603 is driven to rotate by the impact force of the water flow, so that the nylon brush 6033 cleans the outer periphery of the wire winding tube 602; impurities cannot be precipitated on the wire winding tube 602, and the passing speed of the water flow is accelerated. Under the action of centrifugal force and gravity, larger particles and fine particles are directly guided to the conical section of the cyclone body 6 through the spiral impeller and sink into the sand storage tank 5;

[0095] Example 3

[0096] from Figure 1-7 and Fig.19 It can be seen that the process of an off-grid self-cleaning filter in this embodiment includes a filtering state and a backwashing state:

[0097] The filtering state is as follows: when the equipment is working, the water source to be filtered passes through the water inlet 601 and enters the straight section of the cyclone 6. Under the action of the water flow, the impeller disc 603 is driven to rotate. The nylon brush 6033 cleans the outer surface of the wire winding tube 602, brushing off the impurities attached to the outer surface of the wire winding tube 602. The large and small particles entering the equipment are directly guided to the conical section of the cyclone 6 through the impeller disc 603 under the dual action of centrifugal force and gravity, and sink into the sand storage tank 5.

[0098] Impurities with a relatively low density are isolated in the centrifugal cylinder by the wire winding tube 602 and are in a suspended state; clear water passes through the gaps in the wire winding tube 602 and enters the water outlet 201 of the filter.

[0099] Backwashing state: when the filter device reaches the pressure difference or time setting, the controller 7 gives a backwashing instruction, and according to the power-on sequence, the solenoid valve 4 is first powered on from the emptying state to the water supply state for the switch diaphragm valve 3;

[0100] The water passing through the solenoid valve 4 is led out from the water inlet 601, passes through the Y-type filter 9 designed at the water inlet 601 and supplies water to the switch diaphragm valve 3 through the solenoid valve 4, and the switch diaphragm valve 3 is opened; the Y-type filter 9 is used to prevent impurities in the water inlet from clogging the control system pipeline;

[0101] The equipment starts to discharge waste, and the large and small particles deposited at the bottom of the equipment are discharged from the sand storage tank 5 under the action of water pressure; at this time, the pressure in the sand storage tank 5 is negative pressure, and the impurities isolated inside by the wire winding tube 602 and in a suspended state are also sucked into the sand storage tank 5 and discharged by the switch diaphragm valve 3;

[0102] After the sewage discharge is completed, the solenoid valve 4 is powered off and enters the emptying state, and the water source that controls the switch diaphragm valve 3 to be opened is discharged under the action of the spring, and the backwashing of the self-cleaning filter is completed.

[0103] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. An off-grid self-cleaning filter, comprising a sand storage tank (5) and a cyclone fluid (6), characterized in that: The outer surface of the cyclone (6) is provided with a controller (7), and the bottom of the controller (7) is provided with a pressure difference switch (1); A water inlet (601) is provided on one side of the cyclone fluid (6), a Y-type filter (9) is provided at the port of the water inlet (601), an upper pressure cover plate (2) is provided on the top of the cyclone fluid (6), and a water outlet (201) is provided at the center of the upper pressure cover plate (2); The swirling fluid (6) is provided with a wire winding tube (602) inside, a sand storage tank (5) is provided at the bottom of the swirling fluid (6), one side of the sand storage tank (5) is connected to a switch diaphragm valve (3), and a solenoid valve (4) is provided on the switch diaphragm valve (3); The bottom of the differential pressure switch (1) is provided with a high pressure interface (101) and a low pressure interface (102), respectively; the input end of the high pressure interface (101) is connected to one end of the Y-type filter (9) via a water inlet high pressure command pipe (13); the output end of the high pressure interface (101) is connected to the solenoid valve (4) via a water inlet high pressure command pipe (13); and one end of the low pressure interface (102) is connected to the upper pressure cover plate (2) via a water outlet low pressure command pipe (14).

2. The off-grid self-cleaning filter according to claim 1, characterized in that: The pipelines of the water outlet (201) and the water inlet (601) are both provided with pressure gauges (8).

3. The off-grid self-cleaning filter according to claim 1, characterized in that: The surface of the cyclone (6) is provided with an observation hole, and an observation hole high-pressure glass (10) is installed on the surface of the observation hole. The observation hole high-pressure glass (10) is assembled with the cyclone (6) through an observation hole pressure plate (11).

4. The off-grid self-cleaning filter according to claim 3, characterized in that: A lower fixing ring (12) is provided at the bottom of the wire winding tube (602); The lower fixing ring (12) is composed of an outer support (1201), square ribs (1202), a lower fixing ring (1203) and a rubber pad (1204); the lower fixing ring (1203) is arranged at the center of the outer support (1201); the outer ring of the lower fixing ring (1203) is provided with square ribs (1202) at intervals; the two ends of the square ribs (1202) are respectively fixed to the outer support (1201) and the lower fixing ring (1203); and a rubber pad (1204) is arranged at the center of the lower fixing ring (1203); a large-area fan-shaped sand falling opening is formed between the lower fixing ring (1203), the square ribs (1202) and the outer support (1201).

5. The off-grid self-cleaning filter according to claim 4, characterized in that: An upper fixing ring (202) is provided at the bottom of the upper pressure cover plate (2), and the upper and lower ends of the wire winding tube (602) are respectively fixed to the inner rings of the upper fixing ring (202) and the lower fixing ring (1203); The outer rings of the upper fixing ring (202) and the lower fixing ring (1203) are both provided with nylon rings (203).

6. The off-grid self-cleaning filter according to claim 5, characterized in that: The outer ring of the wire winding tube (602) is provided with an impeller disk (603), and the upper and lower ends of the impeller disk (603) are respectively installed on the outer side of the nylon ring (203), and there is a gap between the impeller disk (603) and the nylon ring (203) in the axial and radial directions.

7. The off-grid self-cleaning filter according to claim 6, characterized in that: The impeller disk (603) comprises a fixed disk (6031), spiral blades (6032) and a nylon brush (6033); the outer ring of the fixed disk (6031) is provided with spiral blades (6032) at intervals, and the inner ring of the fixed disk (6031) is provided with nylon brushes (6033) at intervals; A nylon brush lower fixing plate (6035) is arranged on the outer side of the lower end of the nylon brush (6033), a fixed lower wedge iron (6036) is arranged at the bottom of the nylon brush (6033), and an elastic pressing mechanism (6037) is also arranged at the bottom of the nylon brush (6033); The upper end of the nylon brush (6033) is provided with a nylon brush upper fixing plate (6034), the top of the nylon brush (6033) is provided with a movable upper wedge iron (6038), the upper end of the movable upper wedge iron (6038) is provided with an adjustment fixing block (6039), and the adjustment fixing block (6039) is provided with an adjustment bolt (60310).

8. The off-grid self-cleaning filter according to claim 7, characterized in that: The nylon brush upper fixing plate (6034), the nylon brush lower fixing plate (6035), the fixed lower wedge iron (6036), and the adjustment fixing block (6039) are respectively welded on the fixing plate (6031); The upper fixing plate (6034) of the nylon brush is provided with a transverse waist-shaped hole, the lower fixing plate (6035) of the nylon brush is provided with an oblique waist-shaped hole, the upper end of the nylon brush (6033) is provided with a vertical waist-shaped hole, and the lower end of the nylon brush (6033) is provided with a through hole; The upper and lower ends of the nylon brush (6033) are respectively assembled with the nylon brush upper fixing plate (6034) and the nylon brush lower fixing plate (6035) through fasteners; By turning the adjusting bolt (60310) to move downward, the adjusting bolt (60310) pushes the movable upper wedge (6038), so that the nylon brush (6033) moves toward the center of the fixed disk (6031), and at the same time, the movable upper wedge (6038) also squeezes the nylon brush (6033) to move downward.

9. The off-grid self-cleaning filter according to claim 8, characterized in that: The nylon brush (6033) is provided with bevels at both the upper and lower ends. The upper bevel of the nylon brush (6033) is installed in a movable upper wedge iron (6038), and the lower bevel of the nylon brush (6033) is installed in a fixed lower wedge iron (6036).

10. The process of an off-grid self-cleaning filter according to claim 9, characterized in that: Including filtration status and backwash status: The filtering state is as follows: when the device is working, the water source to be filtered passes through the water inlet (601) and enters the straight section of the cyclone (6). Under the action of the water flow, the impeller disc (603) is driven to rotate, and the nylon brush (6033) cleans the outer surface of the wire winding tube (602), brushing off the impurities attached to the outer surface of the wire winding tube (602). The large and small particles entering the device are directly guided to the conical section of the cyclone (6) through the impeller disc (603) under the dual action of centrifugal force and gravity, and sink into the sand storage tank (5); Impurities with a relatively low density are isolated in the centrifugal cylinder by the wire winding tube (602) and are in a suspended state; clear water passes through the gap of the wire winding tube (602) and enters the water outlet 201 of the filter; The backwash state is: When the filter device reaches the pressure difference or the time setting, the controller (7) gives a backwash instruction, and according to the power-on sequence, the solenoid valve (4) is first powered on from the emptying state to the water supply state for the switch diaphragm valve (3); The water passing through the electromagnetic valve (4) is led out from the water inlet (601), passes through the Y-type filter (9) designed at the water inlet (601) and supplies water to the switch diaphragm valve (3) through the electromagnetic valve (4), and the switch diaphragm valve (3) is opened; The equipment starts to discharge waste, and the large and small particles deposited at the bottom of the equipment are discharged from the sand storage tank (5) under the action of water pressure; at this time, the pressure in the sand storage tank (5) is negative pressure, and the impurities isolated inside by the wire winding tube (602) and in a suspended state are also sucked into the sand storage tank (5) and discharged by the switch diaphragm valve (3); After the sewage discharge is completed, the electromagnetic valve (4) is powered off and enters the emptying state, and the water source that controls the switch diaphragm valve (3) to be opened is discharged under the action of the spring, and the backwashing of the self-cleaning filter is completed.

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