Magnetic filter with multiple rows of alternate reverse demagnetization

Abstract

The invention discloses a magnetic filter with multiple rows of alternate reverse demagnetization. The flow channel is provided with a bottom cleaning cavity; the at least two rows of filtering units are transversely arranged between the flow channel and the bottom cleaning cavity; each row of filtering units comprises a plurality of sliding guide grooves formed between the flow channel and the bottom cleaning cavity, electromagnetic adsorption assemblies matched with the sliding guide grooves, and a driving device used for driving the electromagnetic adsorption assemblies to synchronously reciprocate along the sliding guide grooves; and the electromagnetic adsorption assemblies in the front and back adjacent filtering units can alternately reciprocate between the flow channels and the bottom cleaning cavities, so that scrap iron adsorbed from the flow channels is transferred into the bottom cleaning cavities to be discharged. The device has the advantages that the purposes of continuously filtering and automatically cleaning scrap iron adsorbed by the permanent magnet are achieved, and the defects that when a traditional upper interruption system is used for cleaning operation, machine disassembly is needed for cleaning, labor and time are wasted, the labor intensity is large, and the cleaning efficiency is low are overcome.

Description

Technical Field

[0001] The invention relates to a magnetic filter, in particular to a magnetic filter with multiple alternating reverse demagnetization. Background Art

[0002] Magnetic filters are mainly used to separate tiny iron filings from liquid media to meet the process requirements of the liquid media. Therefore, they are widely used in steel, smelting, casting, boilers and other fields. For example, heavy oil, iron sludge and other debris often remain on the coils of plates and strips rolled by the rolling mill. These debris must be cleaned with alkali before the next process, and the oil sludge impurities fall to the bottom of the tank after cleaning. Another example: iron pollutants contained in boiler feed water will cause complex iron scale to form inside the furnace tube, causing the water vapor quality to deteriorate, which will also have a bad impact on the efficiency, output and reliability of the unit, and even threaten the safe operation of the unit.

[0003] At present, the main iron removal processes at home and abroad include pre-hydrogen ion exchangers, powder resin covered filters, tubular filters, electromagnetic filters and permanent magnetic filters. These different types of filtering equipment have their own advantages and disadvantages. For example, the pre-hydrogen ion exchangers and powder resin covered filters have poor high temperature resistance; the tubular filter has low iron removal efficiency and requires regular replacement of filter elements; the permanent magnetic filter has a simple structure, but needs to be disassembled from time to time according to the degree of scrap iron adsorption to remove waste debris, which has low efficiency, affects production continuity, requires high physical labor intensity for cleaning workers, and has potential safety hazards. Summary of the invention

[0004] In view of the defects of existing permanent magnetic filters, such as the need to shut down the production line (the filtered pipeline stops conveying liquid) during operation and cannot operate continuously; workers have to dismantle heavy iron covers and other parts; and the cleaning time often takes several hours, the present invention provides a magnetic filter that can continuously filter and automatically clean iron filings adsorbed by permanent magnets, thereby avoiding interruption of the system for repeated alternating reverse demagnetization.

[0005] In order to solve the above technical problems, the multiple-row alternating reverse demagnetization magnetic filter of the present invention comprises a flow channel with a bottom cleaning chamber, at least two rows of filter units arranged laterally between the flow channel and the bottom cleaning chamber, each row of the filter units comprises a plurality of sliding guide grooves installed between the flow channel and the bottom cleaning chamber, an electromagnetic adsorption component matched with each sliding guide groove, and a driving device for driving each of the electromagnetic adsorption components to move synchronously back and forth along the sliding guide groove, the electromagnetic adsorption components in the front and rear adjacent filter units can alternately reciprocate between the flow channel and the bottom cleaning chamber, thereby transferring the iron filings adsorbed from the flow channel to the bottom cleaning chamber for removal.

[0006] A front-row filter unit and a rear-row filter unit are arranged between the flow channel and the bottom cleaning chamber, the front-row filter unit includes a plurality of front sliding guide grooves installed between the flow channel and the bottom cleaning chamber, a front electromagnetic adsorption component matched with each of the front sliding guide grooves, and a front driving device for driving each of the front electromagnetic adsorption components to reciprocate synchronously along the front sliding guide grooves, the rear-row filter unit includes a plurality of rear sliding guide grooves installed between the flow channel and the bottom cleaning chamber, a rear electromagnetic adsorption component matched with each of the rear sliding guide grooves, and a rear driving device for driving each of the rear electromagnetic adsorption components to reciprocate synchronously along the rear sliding guide grooves, and the front electromagnetic adsorption component and the rear electromagnetic adsorption component can reciprocate alternately between the flow channel and the bottom cleaning chamber.

[0007] The front electromagnetic adsorption component includes a front non-magnetic isolation guide sleeve mounted outside the front sliding guide groove and a front electromagnetic component placed in the front sliding guide groove and capable of moving synchronously with the front non-magnetic isolation guide sleeve, and the front electromagnetic adsorption component is connected to the front drive device through a front transverse push plate; the rear electromagnetic adsorption component includes a rear non-magnetic isolation guide sleeve mounted outside the rear sliding guide groove and a rear electromagnetic component placed in the rear sliding guide groove and capable of moving synchronously with the rear non-magnetic isolation guide sleeve, and the rear electromagnetic adsorption component is connected to the rear drive device through a rear transverse push plate.

[0008] The front electromagnetic component includes a front coil outer protective shell, a front mounting plate encapsulated on the front coil outer protective shell, and a front electromagnetic coil arranged on the front mounting plate and encapsulated in the front coil outer protective shell; the rear electromagnetic component includes a rear coil outer protective shell, a rear mounting plate encapsulated on the rear coil outer protective shell, and a rear electromagnetic coil arranged on the rear mounting plate and encapsulated in the rear coil outer protective shell.

[0009] The front non-magnetic isolation guide sleeve is a U-shaped structure and is installed from the bottom side of the front sliding guide groove. The upper side wall edge of the front non-magnetic isolation guide sleeve is provided with a plurality of front rolling components pressed against the top edge of the front sliding guide groove. The rear non-magnetic isolation guide sleeve is also a U-shaped structure and is installed from the bottom side of the rear sliding guide groove. The upper side wall edge of the rear non-magnetic isolation guide sleeve is provided with a plurality of rear rolling components pressed against the top edge of the rear sliding guide groove.

[0010] The flow channel with a bottom cleaning chamber includes a main shell and a lower shell arranged at the bottom of the main shell and communicating with the main shell. The inner cavity of the lower shell serves as the bottom cleaning chamber and the lower ends of the front filter unit and the rear filter unit are located in the bottom cleaning chamber.

[0011] The front filter unit and the rear filter unit are arranged between the main shell and the lower shell in an inclined manner from the front upper side to the rear lower side, and the bottom surface of the bottom cleaning cavity is an inclined surface inclined from the front rear lower side.

[0012] A front connecting plate and a rear connecting plate are arranged in the lower shell, the bottoms of the front filter unit and the front drive device are fixedly mounted on the front connecting plate, and the bottoms of the rear filter unit and the rear drive device are fixedly mounted on the rear connecting plate.

[0013] The rear end of the lower shell is provided with an exhaust passage for exhausting iron filings.

[0014] The top of each of the front sliding guide grooves is fixedly mounted on the top surface of the main shell body through a front upper cross brace plate, the bottom of each of the front sliding guide grooves is fixedly mounted on the front connecting plate through a front lower cross brace plate, the top of each of the rear sliding guide grooves is fixedly mounted on the top surface of the main shell body through a rear upper cross brace plate, and the bottom of each of the rear sliding guide grooves is fixedly mounted on the rear connecting plate through a rear lower cross brace plate.

[0015] The front sliding guide grooves and the rear sliding guide grooves are arranged staggered with each other in the longitudinal direction.

[0016] The advantages of the present invention are: (1) By horizontally arranging the front filter unit and the rear filter unit between the flow channel and the bottom cleaning chamber, and by alternately reciprocating the front electromagnetic adsorption component of the front filter unit and the rear electromagnetic adsorption component of the rear filter unit up and down between the flow channel and the bottom cleaning chamber, the iron filings adsorbed by the front electromagnetic adsorption component and the rear electromagnetic adsorption component in the flow channel can be alternately transferred to the bottom cleaning chamber for removal, thereby achieving the purpose of continuous filtration and automatic cleaning of the iron filings adsorbed by the permanent magnet, avoiding the disadvantages of the traditional system interruption for cleaning, such as the need to disassemble the machine, time-consuming and labor-intensive, and low cleaning efficiency.

[0017] (2) By setting up a front sliding guide groove and multiple rear sliding guide grooves as the main carrier, together with the matching front electromagnetic adsorption components and rear electromagnetic adsorption components, the entire structure is very simple and the manufacturing cost is low. During the cleaning process, it is only necessary to change the polarity of the front electromagnetic adsorption components and the rear electromagnetic adsorption components to achieve the purpose of adsorption or desorption. It is also very convenient and easy to use, with low cost and good reliability.

[0018] (3) The front and rear electromagnetic components can be formed by cleverly installing the electromagnetic coil on the mounting plate and encapsulating it in a protective shell outside the coil. The row of electromagnetic coils arranged on the mounting plate is used to produce a strong adsorption force to achieve the adsorption of iron filings. The adsorption effect is good, especially the electromagnetic coil itself can directly change the polarity to achieve adsorption and desorption, which is easy to achieve and has good adsorption and desorption effects.

[0019] (4) By arranging a plurality of rolling assemblies pressed against the top edge of the sliding guide groove on the upper side wall edge of the non-magnetic isolation guide sleeve, the flexibility of the reciprocating movement of the non-magnetic isolation guide sleeve is improved, and the reliability of use is further improved.

[0020] (5) A lower shell that is connected to the main shell is directly arranged at the bottom of the main shell, and the inner cavity of the lower shell is used as a bottom cleaning chamber. The sinking structure design not only facilitates the concentrated deposition and desorption of iron chips, but also prevents them from being carried away from the main shell by the fluid, thereby effectively improving the cleaning effect.

[0021] (6) The front filter unit and the rear filter unit are arranged between the main shell and the lower shell, and the bottom surface of the bottom cleaning chamber is an inclined surface inclined from front to back and downward. The inclination angle of the front filter unit and the rear filter unit cooperates with the fluid force to make the iron filings fall into the lower shell to the greatest extent, further improving the cleaning effect. At the same time, the design of the inclined surface can also facilitate the discharge of deposited iron filings out of the lower shell.

[0022] (7) The front sliding guide grooves and the rear sliding guide grooves are staggered in the longitudinal direction. The iron chip adsorption effect can be further improved by utilizing the staggered relationship between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the magnetic filter with multiple alternating reverse demagnetization according to the present invention; Figure 2 It is a schematic diagram of the overall structure of the magnetic filter (part of the housing is removed) with multiple alternating reverse demagnetization according to the present invention; Figure 3 It is a structural schematic diagram of the filtration unit in the present invention; Figure 4 It is a schematic diagram of the exploded structure of the front electromagnetic adsorption component in the present invention; Figure 5 It is a schematic diagram of the exploded structure of the rear electromagnetic adsorption component in the present invention; Figure 6 It is a schematic diagram of the exploded structure of the front electromagnetic component in the present invention; Figure 7 It is a schematic diagram of the exploded structure of the rear electromagnetic component in the present invention. DETAILED DESCRIPTION

[0024] The magnetic filter with multiple alternating reverse demagnetization of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] As shown in the figure, the magnetic filter with multiple alternating reverse demagnetization of the present invention comprises a flow channel 2 with a bottom cleaning chamber 1, a front filter unit 3 and a rear filter unit 4 arranged transversely (perpendicular to the fluid flow direction is defined as transverse, and the fluid flow direction is defined as longitudinal) between the flow channel and the bottom cleaning chamber, that is, the front filter unit 3 and the rear filter unit 4 block the liquid flow direction, and the liquid to be filtered containing iron filings is passed into the flow channel 2, by Figure 1 It can be seen that the flow channel 2 with the bottom cleaning chamber 1 includes a main shell 23 and a lower shell 24 arranged at the bottom of the main shell and connected with the main shell, that is, the lower shell 24 is a sedimentation chamber, which is closed on all sides and only the top is connected with the upper shell, and the inner cavity of the lower shell 24 (i.e., the sedimentation chamber) serves as the bottom cleaning chamber 1, the front filter unit 3 and the rear filter unit 4 are arranged in parallel and are arranged between the main shell 23 and the lower shell 24 from the front upper side to the rear and downward, the upper ends of the front filter unit 3 and the rear filter unit 4 are fixed on the top inner wall of the upper shell, and the lower ends of the front filter unit 3 and the rear filter unit 4 are located in the bottom cleaning chamber 1. In addition, the bottom surface of the bottom cleaning chamber 1 is an inclined surface inclined from the front to the back and downward, so that the accumulated iron filings can be gathered to the rear and downward side by gravity, which is beneficial to the discharge of iron filings. The front filter unit 3 includes a plurality of front sliding guide grooves 5 installed between the flow channel and the bottom cleaning chamber, a front electromagnetic adsorption component 6 matched with each front sliding guide groove, and a front drive device 7 for driving each front electromagnetic adsorption component to move back and forth synchronously along the front sliding guide groove. The rear filter unit 4 includes a plurality of rear sliding guide grooves 8 installed between the flow channel and the bottom cleaning chamber, a rear electromagnetic adsorption component 9 matched with each rear sliding guide groove, and a rear drive device 10 for driving each rear electromagnetic adsorption component to move back and forth synchronously along the rear sliding guide groove. The front drive device 7 and the rear drive device 10 can both use hydraulic cylinders. The front electromagnetic adsorption component 6 and the rear electromagnetic adsorption component 9 can alternately reciprocate between the flow channel and the bottom cleaning chamber, thereby transferring the iron filings adsorbed from the flow channel to the bottom cleaning chamber for removal.

[0026] Furthermore, the front electromagnetic adsorption component 6 includes a front non-magnetic isolation guide sleeve 11 and a front electromagnetic component 12, wherein the front electromagnetic component 12 is arranged in the front sliding guide groove, wherein the front non-magnetic isolation guide sleeve 11 is a U-shaped structure and is mounted from the bottom side of the front sliding guide groove 5 (equivalent to the sliding sleeve installation), the height of the front non-magnetic isolation guide sleeve 11 is greater than the height of the front sliding guide groove, and a plurality of front rolling components 22 are arranged on the upper side wall edge of the front non-magnetic isolation guide sleeve 11. Of course, the front rolling component 22 is located above the front sliding guide groove and can be pressed on the top edge of the front sliding guide groove 5, thereby realizing the guiding effect. The front non-magnetic isolation guide sleeve 11 and the front electromagnetic component 12 are connected to the front drive device 7 through a front transverse push plate 13, thereby driving all the front electromagnetic adsorption components 6 to move back and forth synchronously along the front sliding guide groove. The rear electromagnetic adsorption component 7 includes a rear non-magnetic isolation guide sleeve 14 and a rear electromagnetic component 15. The rear electromagnetic component 15 is arranged in the rear sliding guide groove, and the rear non-magnetic isolation guide sleeve 14 is also a U-shaped structure and is also installed from the bottom side of the rear sliding guide groove (equivalent to the sliding sleeve installation). The height of the rear non-magnetic isolation guide sleeve 14 is greater than the height of the rear sliding guide groove, and the upper side of the rear non-magnetic isolation guide sleeve 14 is A plurality of rear rolling components 33 are arranged on the edge of the wall. Of course, the rear rolling components 33 are located above the rear sliding guide groove and can be pressed on the top edge of the rear sliding guide groove, thereby realizing the guiding effect. The rear non-magnetic isolation guide sleeve 14 and the rear electromagnetic component 15 are connected to the rear drive device 10 through a rear transverse push plate 16, thereby all the rear electromagnetic adsorption components 7 can be driven to reciprocate along the rear sliding guide groove synchronously, that is, the front transverse push plate 13 is connected to the front non-magnetic isolation guide sleeve 11 and the front electromagnetic component 12 at the same time, and is also connected to the front drive device 7 (such as a hydraulic cylinder piston); and the rear transverse push plate 16 is connected to the rear non-magnetic isolation guide sleeve 11 and the front electromagnetic component 12 at the same time. The isolation guide sleeve 14 and the rear electromagnetic component 15 are connected and fixed, and are connected to the rear drive device 10 (such as a hydraulic cylinder piston). The front drive device 7 drives the front non-magnetic isolation guide sleeve 11 and the front electromagnetic component 12 to reciprocate along the front sliding guide groove through the front transverse push plate 13. The rear drive device 10 drives the rear non-magnetic isolation guide sleeve 14 and the rear electromagnetic component 15 to reciprocate along the rear sliding guide groove through the rear transverse push plate 16. In addition, the front rolling assembly 22 and the rear rolling assembly 33 both include a mounting shaft and a bearing mounted on the mounting shaft, thereby effectively reducing friction and wear by utilizing the bearing, thereby achieving the effect of reducing friction resistance.

[0027] Furthermore, the front electromagnetic component 12 includes a front coil outer protective shell 17, a front mounting plate 18 encapsulated on the front coil outer protective shell, and a front electromagnetic coil 19 arranged on the front mounting plate, and the front electromagnetic coil 19 is encapsulated in the front coil outer protective shell. The rear electromagnetic component 15 includes a rear coil outer protective shell 20, a rear mounting plate 21 encapsulated on the rear coil outer protective shell 20, and a rear electromagnetic coil 32 arranged on the rear mounting plate, and the rear electromagnetic coil 32 is encapsulated in the rear coil outer protective shell. That is to say, the coil windings with an iron core are arrayed in a row along the mounting plate and fixedly installed to form front and rear electromagnetic coils and are respectively placed in the front and rear coil outer protective shells.

[0028] Furthermore, a front connecting plate 25 and a rear connecting plate 26 are provided in the lower shell 24, the top of each front sliding guide groove 5 is fixedly mounted on the top surface of the main shell 23 through a front upper cross brace plate 28, the bottom of each front sliding guide groove 5 is fixedly mounted on the front connecting plate 25 through a front lower cross brace plate 29, and at the same time, the bottom of the front drive device 7 is also fixedly mounted on the front connecting plate, the top of each rear sliding guide groove 8 is fixedly mounted on the top surface of the main shell 23 through a rear upper cross brace plate 30, the bottom of each rear sliding guide groove 8 is fixedly mounted on the rear connecting plate 26 through a rear lower cross brace plate 31, and at the same time, the bottom of the rear drive device 10 is also fixedly mounted on the rear connecting plate.

[0029] In order to improve the filtering effect, each front sliding guide groove 5 and each rear sliding guide groove 8 are staggered in the longitudinal direction, that is, the front sliding guide groove 5 and the rear sliding guide groove 8 are staggered in the left and right direction (laterally) to ensure that the gap part of the adjacent front sliding guide groove is aligned with the rear sliding guide groove to ensure that when the electromagnetic adsorption component of one row of filter units goes down, the iron filings in the liquid are adsorbed by the electromagnetic adsorption component of another row of filter units.

[0030] Furthermore, the end of the lower shell 24 is provided with a discharge channel 27 for discharging iron filings. The discharge channel 27 is a closed cavity extending from the rear side of the lower shell. A slot 34 is provided between the connecting surface of the lower shell and the closed cavity, so that the closed cavity can be completely closed by plugging a plug board in the slot. A through hole 35 for connecting to an external fluid is provided on the side wall of the closed cavity, so that after closing, the through hole provided on the closed cavity can be used to connect to the external fluid to discharge the iron filings out of the closed cavity.

[0031] Here’s how it works: Assume the initial state is Figure 2 shown.

[0032] The water with iron filings flows from left to right ( Figure 2The iron filings flow in the left and right directions as shown above. The iron filings are first attracted by the magnets of the front filter unit on the left (front end). When the iron filings accumulate to a certain extent (need to be cleaned), the following control is performed: (1) First, the right (rear end) rear filter unit is driven to move, including the rear transverse push plate connected to the rear drive device 10, driving the rear electromagnetic adsorption assembly to move upward along the rear sliding guide groove until it is in place, as shown in the figure; (2) The front drive device 7 is activated. At this time, the front transverse push plate connected to the front drive device 7 drives the front electromagnetic adsorption assembly to move downward along the front sliding guide groove; The iron filings (magnetized) adsorbed by the front electromagnetic component are concentrated on the front non-magnetic isolation guide sleeve and then move to the bottom cleaning chamber below the flow channel. Because the flow channel below is in a semi-sealed state (the upper part is open), the liquid flow rate is much lower than the flow rate above the flow channel. By interrupting the current of the front electromagnetic coil on the left (front end) and simultaneously passing a reverse current, the front electromagnetic coil generates a reverse magnetic field on the iron core, pushing the iron filings accumulated on the front non-magnetic isolation guide sleeve to fall off and sink due to gravity; In addition, to ensure that the iron filings are not adsorbed by the magnetic field of the front electromagnetic coil and the matching iron core for a second time, the direction of the current flowing into the front electromagnetic coil is alternately changed and maintained for a long time (>3 seconds) so that the iron filings can be completely separated from the front non-magnetic isolation guide sleeve; (3) The iron filings carried in the fluid flowing in from the top of the flow channel are intercepted and adsorbed by the rear electromagnetic unit on the right side (rear end); when they accumulate to a certain level (need to be cleaned), the action process is repeated to complete the functions of alternately adsorbing and removing the iron filings.

[0033] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A magnetic filter with alternating reverse demagnetization, characterized in that: The invention comprises a flow channel (2) having a bottom cleaning chamber (1), and at least two rows of filter units arranged transversely between the flow channel and the bottom cleaning chamber, wherein each row of the filter units comprises a plurality of sliding guide grooves installed between the flow channel and the bottom cleaning chamber, an electromagnetic adsorption component matched with each sliding guide groove, and a driving device for driving each electromagnetic adsorption component to synchronously reciprocate along the sliding guide groove, wherein the electromagnetic adsorption components in the front and rear adjacent filter units can alternately reciprocate between the flow channel and the bottom cleaning chamber, thereby transferring iron filings adsorbed in the flow channel to the bottom cleaning chamber for removal.

2. The magnetic filter with alternating reverse demagnetization according to claim 1, characterized in that: A front filter unit (3) and a rear filter unit (4) are arranged between the flow channel and the bottom cleaning chamber. The front filter unit (3) comprises a plurality of front sliding guide grooves (5) installed between the flow channel and the bottom cleaning chamber, a front electromagnetic adsorption component (6) matched with each of the front sliding guide grooves, and a front drive device (7) for driving each of the front electromagnetic adsorption components to synchronously reciprocate along the front sliding guide grooves. The rear filter unit (4) comprises a plurality of rear sliding guide grooves (8) installed between the flow channel and the bottom cleaning chamber, a rear electromagnetic adsorption component (9) matched with each of the rear sliding guide grooves, and a rear drive device (10) for driving each of the rear electromagnetic adsorption components to synchronously reciprocate along the rear sliding guide grooves. The front electromagnetic adsorption component (6) and the rear electromagnetic adsorption component (9) are capable of alternately reciprocating between the flow channel and the bottom cleaning chamber.

3. The magnetic filter with multiple alternating reverse demagnetization according to claim 1 or 2, characterized in that: The front electromagnetic adsorption component (6) includes a front non-magnetic isolation guide sleeve (11) sleeved outside the front sliding guide groove and a front electromagnetic component (12) arranged in the front sliding guide groove and capable of moving synchronously with the front non-magnetic isolation guide sleeve, and the front electromagnetic adsorption component (6) is connected to the front drive device (7) through a front transverse push plate (13); the rear electromagnetic adsorption component (7) includes a rear non-magnetic isolation guide sleeve (14) sleeved outside the rear sliding guide groove and a rear electromagnetic component (15) arranged in the rear sliding guide groove and capable of moving synchronously with the rear non-magnetic isolation guide sleeve, and the rear electromagnetic adsorption component (7) is connected to the rear drive device (10) through a rear transverse push plate (16); according to the multiple-row alternating reverse demagnetization magnetic filter described in claim 2, it is characterized in that: each of the front sliding guide grooves (5) and each of the rear sliding guide grooves (8) are staggered in the longitudinal direction.

4. The magnetic filter with multiple alternating reverse demagnetization according to claim 3, characterized in that: The front electromagnetic component (12) comprises a front coil outer protective shell (17), a front mounting plate (18) encapsulated on the front coil outer protective shell, and a front electromagnetic coil (19) arranged on the front mounting plate and encapsulated in the front coil outer protective shell. The rear electromagnetic component (15) comprises a rear coil outer protective shell (20), a rear mounting plate (21) encapsulated on the rear coil outer protective shell (20), and a rear electromagnetic coil (32) arranged on the rear mounting plate and encapsulated in the rear coil outer protective shell.

5. The magnetic filter with multiple alternating reverse demagnetization according to claim 2 or 4, characterized in that: The front non-magnetic isolation guide sleeve (11) is a U-shaped structure and is mounted from the bottom side of the front sliding guide groove (5); the upper side wall edge of the front non-magnetic isolation guide sleeve (11) is provided with a plurality of front rolling components (22) pressed against the top edge of the front sliding guide groove (5); the rear non-magnetic isolation guide sleeve (14) is also a U-shaped structure and is mounted from the bottom side of the rear sliding guide groove (8); the upper side wall edge of the rear non-magnetic isolation guide sleeve (14) is provided with a plurality of rear rolling components (33) pressed against the top edge of the rear sliding guide groove (8).

6. The magnetic filter with multiple alternating reverse demagnetization according to claim 5, characterized in that: The flow channel (2) having a bottom cleaning chamber (1) comprises a main shell (23) and a lower shell (24) arranged at the bottom of the main shell and communicating with the main shell, wherein the inner cavity of the lower shell (24) serves as the bottom cleaning chamber (1) and the lower ends of the front filter unit (3) and the rear filter unit (4) are located in the bottom cleaning chamber (1).

7. The magnetic filter with multiple alternating reverse demagnetization according to claim 6, characterized in that: The front filter unit (3) and the rear filter unit (4) are arranged between the main shell (23) and the lower shell (24) in an inclined manner from the front upper side to the rear lower side, and the bottom surface of the bottom cleaning chamber (1) is an inclined surface inclined from the front rear lower side.

8. The magnetic filter with multiple alternating reverse demagnetization according to claim 6 or 7, characterized in that: A front connecting plate (25) and a rear connecting plate (26) are arranged in the lower shell (24), the bottoms of the front filter unit (3) and the front drive device (7) are fixedly mounted on the front connecting plate, and the bottoms of the rear filter unit (4) and the rear drive device (10) are fixedly mounted on the rear connecting plate; according to the multiple-row alternating reverse demagnetization magnetic filter as described in claim 8, it is characterized in that: the rear end of the lower shell (24) is provided with an exclusion channel (27) for eliminating iron filings.

9. The magnetic filter with multiple alternating reverse demagnetization according to claim 9, characterized in that: The top of each of the front sliding guide grooves (5) is fixedly mounted on the top surface of the main housing (23) via a front upper cross brace plate (28), the bottom of each of the front sliding guide grooves (5) is fixedly mounted on the front connecting plate (25) via a front lower cross brace plate (29), the top of each of the rear sliding guide grooves (8) is fixedly mounted on the top surface of the main housing (23) via a rear upper cross brace plate (30), and the bottom of each of the rear sliding guide grooves (8) is fixedly mounted on the rear connecting plate (26) via a rear lower cross brace plate (31).

10. The magnetic filter with multiple alternating reverse demagnetization according to claim 10, characterized in that: A slot is provided between the connecting surfaces of the lower shell (24) and the exhaust channel (27), and a plug plate for isolating the closed cavity from the lower shell can be plugged into the slot.

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