Self-cleaning angle filters and self-cleaning angle filter systems

Abstract

An automatic cleaning angle filter and an automatic cleaning angle filter system. The automatic cleaning angle filter comprises: a filter barrel; a cover, the cover is arranged at the first end of the filter barrel; a filter screen, the filter screen is installed in the filter barrel, the first end of the filter screen is located at the first end of the filter barrel, and the second end of the filter screen is located at the second end of the filter barrel; a feed pipe, the feed pipe is connected to the second end of the filter barrel; a discharge pipe, the discharge pipe is arranged on the side of the filter barrel; a sewage pipe, the sewage pipe is connected to the second end of the filter barrel; a sewage valve, the sewage valve is arranged on the sewage pipe; a cleaning pipe, the first end of the cleaning pipe is used to connect the cleaning liquid, the second end of the cleaning pipe is connected to a cleaning head, and the cleaning head passes through the cover and extends into the filter screen. The automatic cleaning angle filter can achieve good automatic cleaning.

Description

Technical Field

[0001] The invention relates to the field of angle filtering, in particular to an automatic cleaning angle filter and an automatic cleaning angle filter system. Background Art

[0002] Angle filters can be applied to various water supply systems to protect pumps, instruments and other equipment to work properly, especially systems that run continuously without stopping. Angle filters can filter out various particulate impurities in the water to ensure the safe and reliable operation of system equipment. Therefore, angle filters can be widely used in various water supply systems such as brewing, beverages, biomedicine, steel industry, metallurgy, papermaking, chemical industry, plastics industry and irrigation.

[0003] The existing angle filter needs to be cleaned manually by a dedicated person, which is troublesome to operate and maintain, and wastes manpower and material resources. In addition, there are defects such as insufficient cleaning, frequent cleaning, and inconvenient operation and maintenance.

[0004] For more information about existing angle filters, please refer to Chinese patents with publication numbers CN201366281Y, CN201366283Y, CN203303734U, CN205461313U, CN204319913U and CN201366275Y. Summary of the invention

[0005] The problem solved by the present invention is to provide an automatic cleaning angle filter and an automatic cleaning angle filter system to realize automatic cleaning of the angle filter and ensure filtering effect.

[0006] To solve the above problems, the present invention provides an automatic cleaning angle filter, comprising: a filter barrel; a sealing cover, which is arranged at the first end of the filter barrel; a filter screen, which is installed in the filter barrel, the first end of the filter screen is located at the first end of the filter barrel, and the second end of the filter screen is located at the second end of the filter barrel; a feed pipe, which is connected to the second end of the filter barrel; a discharge pipe, which is arranged on the side of the filter barrel; and also includes: a drain pipe, which is connected to the second end of the filter barrel; a drain valve, which is arranged on the drain pipe; a cleaning pipe, the first end of the cleaning pipe is used to connect the cleaning liquid, the second end of the cleaning pipe is connected to a cleaning head, and the cleaning head passes through the sealing cover and extends into the filter screen.

[0007] Optionally, the cleaning head is a rotating spray ball, and can further be a 720° automatic rotating spray ball.

[0008] Optionally, the automatic cleaning angle filter further comprises a connecting pipe, a first end of the connecting pipe is connected to the second end of the filter barrel, a second end of the connecting pipe is connected to the drain pipe, and a side of the connecting pipe is connected to the feed pipe.

[0009] Optionally, the automatic cleaning angle filter further comprises at least one of the following two valves: a feed valve, which is arranged on the feed pipe; and a cleaning valve, which is arranged on the cleaning pipe.

[0010] Optionally, an electromagnet coil is wound around the outer side of the filter barrel.

[0011] In order to solve the above problems, the present invention also provides an automatic cleaning angle filter system, comprising two or more automatic cleaning angle filters as described above, the automatic cleaning angle filters are cascaded front and back, and the discharge pipe of the automatic cleaning angle filter of the previous stage is connected to the feed pipe of the automatic cleaning angle filter of the next stage.

[0012] Optionally, an electromagnet coil is wound around the outer side of the filter barrel of the automatic cleaning angle filter.

[0013] Optionally, the discharge pipe is connected to the feed pipe via a cascade pipe, and an electromagnet coil is wound around the outer side of the cascade pipe.

[0014] Optionally, the number of filter meshes of the automatic cleaning angular filter of the latter stage is greater than the number of filter meshes of the automatic cleaning angular filter of the former stage.

[0015] Optionally, the drain pipes of all the automatic cleaning angle filters are connected to an integrated pipe, and the integrated pipe is connected to a metal powder recovery pipe and a centralized drain pipe.

[0016] In one aspect of the technical solution of the present invention, the automatic cleaning angle filter is provided with a sewage discharge pipe, a sewage discharge valve and a cleaning pipe, and the second end of the cleaning pipe is connected to a cleaning head, which passes through the cover and extends into the filter screen. Therefore, the overall automatic cleaning angle filter can achieve automatic cleaning.

[0017] Furthermore, in another aspect of the technical solution of the present invention, the automatic cleaning angle filter can conveniently realize automatic cleaning without manual cleaning, and can directly discharge the sewage and foreign particles generated by cleaning. The operation and maintenance are simple, and the cleaning head is directly located in the filter net, so it can be fully cleaned and the cleaning effect is good.

[0018] Furthermore, in another aspect of the technical solution of the present invention, the automatic cleaning angle filter system also includes an electromagnet coil arranged at a corresponding position (including an electromagnet coil arranged on the outer side of the cascade tube and an electromagnet coil arranged on the outer side of the filter barrel). The existence of these electromagnet coils enables them to adsorb metal particles such as iron, cobalt, and nickel in the feed liquid on the corresponding barrel wall and tube wall when they are energized, thereby further achieving a better filtering effect. The magnetism of the electromagnet coil disappears after power failure, so the corresponding adsorbed metal particles such as iron, cobalt, and nickel can be cleaned in time during the power failure, thereby also ensuring a good self-cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of an automatic cleaning angle filter provided by an embodiment;

[0020] Figure 2 is a schematic diagram of another automatic cleaning angle filter provided by another embodiment;

[0021] Figure 3 The figure is a schematic diagram of an automatic cleaning angle filter system provided by an embodiment. DETAILED DESCRIPTION

[0022] The existing angular filters are inconvenient to clean. Therefore, the present invention provides a new automatic cleaning angular filter and a system consisting of more than two automatic cleaning angular filters to solve the above-mentioned shortcomings.

[0023] For a clearer representation, the present invention is described in detail below with reference to the accompanying drawings.

[0024] Please refer to Figure 1 The present embodiment provides an automatic cleaning angle filter, comprising: a filter barrel 110, a cover 111, a filter screen 112, a feed pipe 130, a discharge pipe 160, a drain pipe 140, a drain valve 141 and a cleaning pipe 150. The cover 111 is disposed at the first end (first end) of the filter barrel 110. Figure 1 The filter screen 112 is installed in the filter barrel 110, the first end of the filter screen 112 is located at the first end of the filter barrel 110, and the second end of the filter screen 112 is located at the second end of the filter barrel 110. The feed pipe 130 is connected to the second end of the filter barrel 110. The discharge pipe 160 is arranged on the side of the filter barrel 110. The drain pipe 140 is connected to the second end of the filter barrel 110. The drain valve 141 is arranged on the drain pipe 140. The first end of the cleaning pipe 150 is used to connect the cleaning liquid, and the second end of the cleaning pipe 150 is connected to the cleaning head 152, and the cleaning head 152 passes through the cover 111 and extends into the filter screen 112.

[0025] It should be noted that Figure 1 The arrows (not marked) indicate the flow direction of the corresponding liquid.

[0026] In this embodiment, the cleaning head 152 is a rotating spray ball. The rotating spray ball can automatically rotate 720 degrees under the action of water pressure (that is, the rotating spray ball is a 720 degree rotating spray ball at this time), thereby achieving a better automatic cleaning effect.

[0027] In this embodiment, the automatic cleaning angle filter also includes a connecting pipe 120, the first end of the connecting pipe 120 is connected to the second end of the filter barrel 110, the second end of the connecting pipe 120 is connected to the sewage pipe 140, and the side of the connecting pipe 120 is connected to the feed pipe 130.

[0028] In this embodiment, the automatic cleaning angle filter further includes a feed valve 131 , which is disposed on the feed pipe 130 .

[0029] In this embodiment, the automatic cleaning angle filter further includes a cleaning valve 151 , which is disposed on the cleaning pipe 150 .

[0030] In this embodiment, the filter barrel 110 may be made of carbon steel or stainless steel, and the inner wall of the filter barrel 110 may be covered with a corrosion-resistant coating. The filter barrel 110 may be cylindrical.

[0031] In this embodiment, a sealing ring (not shown) may be provided between the second end of the filter screen 112 and the inner wall of the second end of the filter barrel 110. The filter screen 112 may be made of carbon steel, stainless steel or resin.

[0032] In this embodiment, the first end of the cleaning pipe 150 is used to connect the cleaning liquid. Specifically, the first end of the cleaning pipe 150 can be a high-pressure cleaning water inlet, and the cleaning liquid can be water. The filter 112 can be cleaned better by using high-pressure water.

[0033] In the automatic cleaning angle filter provided in this embodiment, since the sewage pipe 140, sewage valve 141 and cleaning pipe 150 are additionally provided, and the second end of the cleaning pipe 150 is connected with a cleaning head 152, the cleaning head 152 passes through the cover 111 and extends into the filter screen 112. Therefore, the overall automatic cleaning angle filter can realize automatic cleaning, so as to realize automatic cleaning of the suspended matter filtered by the filter screen 112.

[0034] Specifically, its use process includes:

[0035] In normal use, the drain valve 141 is closed, and the liquid to be filtered enters the filter screen 112 from the feed pipe 130, then enters the filter screen 112 from the filter screen 112 to the filter barrel 110 outside the filter screen 112, and then is discharged from the discharge pipe 160 on the side of the filter barrel 110 to achieve filtered discharge;

[0036] After a period of normal use, when the filter screen 112 needs to be cleaned, the feeding of the feed liquid is stopped (since there is a feed valve 131 in this embodiment, the feeding can be stopped through the feed valve 131), and the discharge of the discharge pipe 160 is stopped at the same time, and the cleaning head 152 is used to clean the filter screen 112 through the cleaning liquid; and the sewage valve 141 is opened to discharge the cleaned liquid through the sewage pipe 140 (the sewage valve 141 can be opened before the cleaning head 152 is cleaned, and can also be opened after the cleaning head 152 enters the cleaning).

[0037] After cleaning, close the drain valve 141 again and the device can be used normally again.

[0038] From the above content, it can be seen that the automatic cleaning angle filter provided in this embodiment can easily realize automatic cleaning, does not require manual cleaning, and can directly discharge the sewage and foreign particles generated by cleaning. The operation and maintenance are simple, and the cleaning head 152 is directly located in the filter net 112, so it can be fully cleaned and the cleaning effect is good.

[0039] Please refer to Figure 2 The present embodiment provides an automatic cleaning angle filter, comprising: a filter barrel 210, a cover 211, a filter screen 212, a feed pipe 230, a discharge pipe 260, a drain pipe 240, a drain valve 241 and a cleaning pipe 250. The cover 211 is disposed at the first end (first end) of the filter barrel 210. Figure 2 The filter screen 212 is installed in the filter barrel 210, the first end of the filter screen 212 is located at the first end of the filter barrel 210, and the second end of the filter screen 212 is located at the second end of the filter barrel 210. The feed pipe 230 is connected to the second end of the filter barrel 210. The discharge pipe 260 is arranged on the side of the filter barrel 210. The drain pipe 240 is connected to the second end of the filter barrel 210. The drain valve 241 is arranged on the drain pipe 240. The first end of the cleaning pipe 250 is used to connect the cleaning liquid, and the second end of the cleaning pipe 250 is connected to the cleaning head 252, and the cleaning head 252 passes through the cover 211 and extends into the filter screen 212.

[0040] It should be noted that Figure 2 The arrows (not marked) indicate the flow direction of the corresponding liquid.

[0041] In this embodiment, the cleaning head 252 is a rotating spray ball. The rotating spray ball can realize automatic 720° rotating spray under the action of water pressure (that is, the rotating spray ball is a 720° rotating spray ball at this time), thereby realizing a better automatic cleaning effect. In this embodiment, the automatic cleaning angle filter also includes a connecting pipe 220, the first end of the connecting pipe 220 is connected to the second end of the filter barrel 210, the second end of the connecting pipe 220 is connected to the sewage pipe 240, and the side of the connecting pipe 220 is connected to the feed pipe 230. In this embodiment, the automatic cleaning angle filter also includes a feed valve 231, and the feed valve 231 is arranged on the feed pipe 230. In this embodiment, the automatic cleaning angle filter also includes a cleaning valve 251, and the cleaning valve 251 is arranged on the cleaning pipe 250.

[0042] For more information about the structure, properties and advantages of the automatic cleaning angle filter of this embodiment, please refer to the corresponding content of the aforementioned embodiment.

[0043] Different from the above-mentioned embodiment, in this embodiment, an electromagnet coil 270 is wound around the outer side of the filter barrel 210. At this time, the automatic cleaning angle filter becomes an electromagnetic automatic cleaning angle filter, or an automatic cleaning electromagnetic angle filter. It can be a filtering device that uses electromagnetic force to remove magnetic metals (such as permanent magnets), magnetic oxides in water, or other substances in water.

[0044] It should be noted that Figure 2 Although not shown, in this embodiment, the automatic cleaning angle filter may also include a heat insulation curtain, which is located between the filter barrel 210 and the electromagnet coil 270. That is, a layer of heat insulation curtain may be wrapped around the outer side of the filter barrel 210, and then the corresponding electromagnet coil 270 may be wound around it. This is because when the temperature is too high, the electromagnet coil 270 is easily affected, and the magnetism may be reduced or damaged. Therefore, when the filter is used to filter high-temperature liquids (this situation usually occurs in industry), a corresponding heat insulation curtain may be added to protect the electromagnet coil 270.

[0045] In this embodiment, the material of the filter barrel 210 can be iron, that is, it can be made of metal iron material to facilitate demagnetization. And when metal iron material is used, when the electromagnet coil 270 is energized, the corresponding electromagnetic force is stronger, and the corresponding metal particles (powder) in the liquid in the filter can be better adsorbed. The magnetic force of the electromagnet (electromagnet coil 270) is mainly related to the following three aspects: first, the number of coils of the electromagnet. The more coils are wound, the stronger the electromagnetic force; second, it is related to the diameter of the electromagnet. The larger the diameter, the stronger the electromagnetic force, but the diameter of the filter tube is preferably about 1800mm; third, it is related to the current of the electromagnet. The larger the current, the stronger the electromagnetic force. It is advisable to use AC380V (380V AC) voltage to output DC110V (110V DC) voltage through a rectifier.

[0046] Since the filter barrel 210 is made of iron, accordingly, the filter net 212 may also be made of iron, or the filter net 212 may be made of resin material or the like.

[0047] The electromagnet coil 270 on the outer surface of the filter barrel 210 can be wound in a variety of ways. Different winding ways result in different positions of the magnetic attraction points of the electromagnetic force. Figure 2 In the winding method shown in the figure, the magnetic force generated is concentrated at the upper and lower ends of the coil, and the metal particles (powder) attracted are also mainly concentrated at the upper and lower ends. The filter in the middle is mainly used to filter suspended matter, which can separate the metal particles (powder) to be recycled from other suspended matter, thereby facilitating the subsequent purification of the metal particles (powder), realizing waste recycling, and generating better economic value.

[0048] As can be seen from the above, the automatic cleaning angle filter provided in this embodiment can be used for separation and filtration of heavy metal substances and suspended solids in water treatment, self-cleaning and recycling of metal substances. The filter barrel 210 of the automatic cleaning angle filter provided in this embodiment can be designed for vertical installation, which can be used in sewage treatment and can also be used for pre-treatment of purified water.

[0049] Please refer to Figure 3 Another embodiment of the present invention provides an automatic cleaning angle filter system, which may include the automatic cleaning angle filters provided by the aforementioned embodiments, and the automatic cleaning angle filters are cascaded front and back, and the discharge pipe of the previous stage automatic cleaning angle filter is connected to the feed pipe of the next stage automatic cleaning angle filter.

[0050] In this embodiment, Figure 3 As shown, it specifically includes three front-to-back cascaded automatic cleaning angle filters, namely automatic cleaning angle filter 10, automatic cleaning angle filter 20 and automatic cleaning angle filter 30. Most of the structures of these three automatic cleaning angle filters are similar to those of FIG. Figure 2The filter structure shown is the same, but does not include some of the valve structures (discharge valve and feed valve), but only has the corresponding main valve structure (total discharge valve and total discharge valve, refer to the subsequent content).

[0051] It should be noted that, in other embodiments, the corresponding automatic cleaning angle filter system may include only two automatic cleaning angle filters, or may include more than four automatic cleaning angle filters. Figure 3 The arrows in the figure also indicate the general flow direction of the corresponding liquid.

[0052] The parts of the automatic cleaning angle filter 10, the automatic cleaning angle filter 20 and the automatic cleaning angle filter 30 are not marked (the markings refer to the above-mentioned embodiments), but they also include: a filter barrel; a cover, which is arranged at the first end of the filter barrel; a filter screen, which is installed in the filter barrel, the first end of the filter screen is located at the first end of the filter barrel, and the second end of the filter screen is located at the second end of the filter barrel; a feed pipe, which is connected to the second end of the filter barrel; a discharge pipe, which is arranged on the side of the filter barrel; a sewage pipe, which is connected to the second end of the filter barrel; a sewage valve, which is arranged on the sewage pipe; a cleaning pipe, the first end of the cleaning pipe is used to connect the cleaning liquid, and the second end of the cleaning pipe is connected to a cleaning head, which passes through the cover and extends into the filter screen; a connecting pipe, the first end of the connecting pipe is connected to the second end of the filter barrel, the second end of the connecting pipe is connected to the sewage pipe, and the side of the connecting pipe is connected to the feed pipe; a feed valve, which is arranged on the feed pipe; and a cleaning valve, which is arranged on the cleaning pipe. Please refer to the corresponding contents of the above-mentioned embodiments.

[0053] In this embodiment, the outer side of the filter barrel of the automatic cleaning angle filter is wound with an electromagnet coil. Specifically, the outer side of the filter barrel of the automatic cleaning angle filter 10 is wound with an electromagnet coil 11, the outer side of the filter barrel of the automatic cleaning angle filter 20 is wound with an electromagnet coil 21, and the outer side of the filter barrel of the automatic cleaning angle filter 30 is wound with an electromagnet coil 31.

[0054] In addition to the above structure, the automatic cleaning angle filter system of this embodiment includes a main feed pipe 40, and a main feed valve 41 is provided on the main feed pipe 40. The automatic cleaning angle filter system includes a main discharge pipe 50, and a main discharge valve 51 is provided on the main discharge pipe 50.

[0055] In this embodiment, specifically, the discharge pipe is connected to the feed pipe via a cascade pipe, and an electromagnet coil is wound around the outer side of the corresponding cascade pipe. Specifically, the discharge pipe of the automatic cleaning angle filter 10 is connected to the feed pipe of the automatic cleaning angle filter 20 via a cascade pipe 91, and an electromagnet coil (not marked) is wound around the outer side of the cascade pipe 91; the discharge pipe of the automatic cleaning angle filter 20 is connected to the feed pipe of the automatic cleaning angle filter 30 via a cascade pipe 92, and an electromagnet coil (marked) is wound around the outer side of the cascade pipe 92.

[0056] It should be noted that Figure 3 Although not shown, in this embodiment, the automatic cleaning angle filter system can also include corresponding insulation curtains, which are located between the electromagnet coil and the corresponding outer side of the barrel or the outer side of the tube. The principle can refer to the corresponding content of the above-mentioned embodiment.

[0057] In this embodiment, the number of filter meshes of the next-stage automatic cleaning angle filter is greater than the number of filter meshes of the previous-stage automatic cleaning angle filter. In a specific case, for example, the number of filter meshes of the first-stage automatic cleaning angle filter 10 is 100 meshes; the number of filter meshes of the second-stage automatic cleaning angle filter 20 is 300 meshes; the number of filter meshes of the third-stage automatic cleaning angle filter 30 is 500 meshes; if there are more cascaded filters, the number of filter meshes is increased step by step, and so on.

[0058] In this embodiment, Figure 3 As shown, the drain pipes of all the automatic cleaning angle filters are connected to the integrated pipe, and the integrated pipe is connected to the metal powder recovery pipe and the centralized drain pipe. Specifically, the drain pipe of the automatic cleaning angle filter 10 is connected to the integrated pipe 60 through the pipe 61, the drain pipe of the automatic cleaning angle filter 20 is connected to the integrated pipe 60 through the pipe 62, and the drain pipe of the automatic cleaning angle filter 30 is connected to the integrated pipe 60 through the pipe 63. The pipes 61 and 62 themselves are respectively connected to the metal powder recovery pipe 70 and the centralized drain pipe 80, that is, the integrated pipe 60 is connected to the magnetic material, such as iron, nickel, cobalt and other metal characteristic particles (powder), hereinafter referred to as metal particles (powder), the recovery pipe 70 and the centralized drain pipe 80 through the pipes 61 and 62.

[0059] The opening of the metal particle (powder) recovery pipe 70 corresponds to the metal particle (powder) recovery port, and the opening of the centralized sewage discharge pipe 80 corresponds to the centralized sewage discharge port. In addition, the first valve 71 is provided in this embodiment to control the metal particle (powder) recovery pipe 70, and the second valve 81 is provided to control the centralized sewage discharge pipe 80.

[0060] The automatic cleaning angle filter system provided in this embodiment includes two or more of the automatic cleaning angle filters mentioned above, so it can not only play a better filtering role, but also has a good automatic cleaning effect.

[0061] Furthermore, in this embodiment, the automatic cleaning angle filter system also includes an electromagnet coil arranged at a corresponding position (including an electromagnet coil arranged on the outer side of the cascade tube and an electromagnet coil arranged on the outer side of the filter barrel). The existence of these electromagnet coils enables them to adsorb metal particles such as iron, cobalt, and nickel in the feed liquid on the corresponding barrel wall and tube wall when they are powered on, thereby further achieving a better filtering effect. The magnetism of the electromagnet coil disappears after power failure, so the corresponding adsorbed metal particles such as iron, cobalt, and nickel can be cleaned in time during the power failure, thereby also ensuring a good self-cleaning effect.

[0062] Specifically, the automatic cleaning angle filter system is provided with a centralized sewage outlet (located at one end of the centralized sewage outlet pipe 80) and a metal powder recovery outlet (located at one end of the metal particle recovery pipe 70), and the filter system can be equipped with a pressure gauge (not shown), which is used to detect the pressure on both sides of the filter screen. At this time, when performing metal powder recovery and sewage discharge operations, the following steps can be taken:

[0063] When the pressure gauge detects that the pressure difference reaches a certain set value, the total feed valve 41 will be automatically closed. At this time, the power of each electromagnetic coil will not be cut off, but the drain valves and the second valve 81 will be opened to drain the suspended dirt in the filter system; then the drain valves will be closed, and the first valve 71 (metal powder recovery valve) will be opened. At this time, the power of each electromagnetic coil will be disconnected, the metal powder will automatically fall, and each cleaning valve will be opened. Under the action of water pressure, each cleaning head (cleaning nozzle) will automatically rotate 720° to clean the wall of each filter barrel and rinse the inside of each level of the connecting pipe, so that all metal powder is discharged from the inside of the system along the metal powder recovery port into a specific collection device (such as a collection barrel); the collected metal powder is then subjected to multiple electromagnetic filtration and cleaning, and high-purity metal powder can be collected, which has a very high economic value.

[0064] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. An automatic cleaning angular filter system, comprising two or more automatic cleaning angular filters, wherein the automatic cleaning angular filters include: Filter barrel; A sealing cover, the sealing cover being arranged at a first end of the filter barrel; A filter screen, wherein the filter screen is installed in the filter barrel, wherein a first end of the filter screen is located at a first end of the filter barrel, and a second end of the filter screen is located at a second end of the filter barrel; A feed pipe connected to the second end of the filter barrel; A discharge pipe, the discharge pipe is arranged on the side of the filter barrel; It is characterized by further comprising: A sewage pipe connected to the second end of the filter barrel; A sewage valve, wherein the sewage valve is arranged on the sewage pipe; A cleaning pipe, wherein the first end of the cleaning pipe is used to connect the cleaning liquid, the second end of the cleaning pipe is connected to a cleaning head, and the cleaning head passes through the cover and extends into the filter screen; Also includes at least one of the following two valves: A feed valve, the feed valve being arranged on the feed pipe; A cleaning valve, wherein the cleaning valve is arranged on the cleaning pipe; The outer side of the filter barrel is wound with an electromagnet coil; The automatic cleaning angular filters are cascaded front and back, and the discharge pipe of the automatic cleaning angular filter of the previous stage is connected to the feed pipe of the automatic cleaning angular filter of the next stage; The drainage pipes of all the automatic cleaning angle filters are connected to an integrated pipe, and the integrated pipe is connected to a metal powder recovery pipe and a centralized drainage pipe; It also includes a first valve for controlling a metal powder recovery pipe, and a second valve for controlling a centralized sewage discharge pipe; It also includes a pressure gauge, which is used to detect the pressure on both sides of the filter screen. When the pressure gauge detects that the pressure difference reaches a certain set value, the feed valve will be automatically closed. At this time, the power of each electromagnetic coil is not cut off, but the drain valve and the second valve are opened to drain the suspended dirt in the filter system; then the second valve is closed and the first valve is opened. At this time, the power of each electromagnetic coil is disconnected, the metal powder will automatically fall, and the cleaning valves are opened.

2. The automatic cleaning angle filter system according to claim 1, characterized in that: The cleaning head is a rotating spray ball.

3. The automatic cleaning angle filter system according to claim 1, characterized in that: It also includes a connecting pipe, a first end of the connecting pipe is connected to the second end of the filter barrel, a second end of the connecting pipe is connected to the sewage pipe, and a side of the connecting pipe is connected to the feed pipe.

4. The automatic cleaning angle filter system according to claim 1, characterized in that: An electromagnet coil is wound around the outer side of the filter barrel of the automatic cleaning angle filter.

5. The automatic cleaning angle filter system according to claim 1 or 4, characterized in that: The discharge pipe is connected to the feed pipe through a cascade pipe, and an electromagnet coil is wound around the outer side of the cascade pipe.

6. The automatic cleaning angle filter system according to claim 1 or 4, characterized in that: The number of filter meshes of the automatic cleaning angular filter of the latter stage is greater than the number of filter meshes of the automatic cleaning angular filter of the former stage.

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