A multi-stage filtration device for stripping liquid production

Abstract

The present invention belongs to the technical field of filtering devices, and in particular to a multi-stage filtering device for stripping liquid production, comprising a mounting seat, a pre-filter box mounted on the surface of the mounting seat, and a buffer flow equalizing cylinder mounted on the surface of the mounting seat, the buffer flow equalizing cylinder being arranged below the pre-filter box, a plurality of sealed cans being equidistantly mounted on the surface of the mounting seat from right to left, a sealing cover being movably connected on the surface of the sealed can, a plurality of groups of filtering components being arranged between two adjacent sealed cans, a pressure regulating component for regulating the filtering speed being arranged below the pre-filter box, a clamping piece being mounted on the surface of the mounting seat, the clamping piece being arranged at both ends of the filtering component, the clamping piece being used for disassembling and assembling a single filtering component, a cleaning component being arranged inside the sealed can, and the cleaning component continuously cleans the barrel wall of the sealed can during the filtering process; the present invention divides the filter element of the device into a plurality of small units, the small unit filter elements can be individually disassembled and assembled during the operation of the device, and the filter residue can be cleaned in time.

Description

Technical Field

[0001] The invention belongs to the technical field of filtering devices, and in particular relates to a multi-stage filtering device for producing stripping liquid. Background Art

[0002] Stripping liquid is often used in the photoresist removal process. Stripping liquid is also called "cleaning liquid" or "degumming liquid". During the production process, the stripping liquid is filtered to remove unreacted raw materials or impurities, thereby improving the performance of the product and extending its service life, ensuring the purity and stability of the final product.

[0003] The existing stripping liquid multi-stage filtration device still has certain defects during use, and the specific problems are as follows:

[0004] The filter element used for filtration is usually a whole filter element. During the use of the filter element, as impurities clog it, its filtration efficiency will gradually decrease. In this case, even if the recommended replacement time has not been reached, the filter element will be replaced to ensure the filtration speed of the device, and the filter element cannot be fully utilized, resulting in a waste of resources;

[0005] Existing stripping liquid filtering devices usually require regular cleaning of the filter element or filter screen, as well as cleaning of the sediment attached to the inner wall of the device. During the cleaning or replacement process, the device cannot continue to perform filtering work, thereby preventing further improvement in production efficiency. Summary of the invention

[0006] The present invention provides a multi-stage filtering device for producing a stripping liquid, which can effectively solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: a multi-stage filtering device for stripping liquid production, comprising a mounting seat, a pre-filter box mounted on the surface of the mounting seat, and a buffer flow-distributing cylinder mounted on the surface of the mounting seat, wherein the buffer flow-distributing cylinder is arranged below the pre-filter box;

[0008] A plurality of sealing cans are equidistantly installed on the surface of the mounting seat from right to left, and a sealing cover is movably connected to the surface of the sealing can, and a plurality of groups of filter components are arranged between two adjacent sealing cans, and a pressure regulating component for regulating the filtering speed is installed below the pre-filter box, and a clamping piece is installed on the surface of the mounting seat, and the clamping piece is arranged at both ends of the filter component, and the clamping piece is used for disassembling and assembling a single filter component, and a T-shaped constraint tube is arranged inside the clamping piece, and an L-shaped constraint rod is arranged inside the filter component, when the stripping liquid flows in the filter component, the T-shaped constraint tube moves toward the L-shaped constraint rod and engages with it, and is used to resist the force perpendicular to the radial direction of the filter component, and when the stripping liquid does not flow in the filter component, the T-shaped constraint tube and the L-shaped constraint rod are separated, and a cleaning component is arranged inside the sealed can, and the cleaning component includes a first scraper plate and a second scraper plate, which continuously cleans the barrel wall of the sealed can during the filtration process.

[0009] As a preferred multi-stage filtration device for stripping liquid production of the present invention, the pressure regulation component includes a piston cylinder symmetrically arranged between the pre-filter box and the buffer flow equalizing cylinder, the interior of the piston cylinder is slidably connected with a piston block, and two circular holes opened on the surface of the piston cylinder are respectively installed with a first one-way valve and a second one-way valve, the first one-way valve is connected to the interior of the pre-filter box through a pipeline, the second one-way valve is connected to the interior of the buffer flow equalizing cylinder through a pipeline, and the buffer flow equalizing cylinder is connected to the interior of the sealing tank at the far right through a pipeline.

[0010] As a preferred multi-stage filtering device for stripping liquid production of the present invention, an electric push rod is installed on the surface of one of the piston cylinders, a connecting rod is fixedly connected between the two piston blocks, and the end of the electric push rod output shaft is fixedly connected to the connecting rod.

[0011] As a preferred multi-stage filtration device for stripping liquid production of the present invention, the filtration assembly includes an electrically controlled valve installed on the right wall of the sealed tank through a pipeline and a third one-way valve installed on the left wall of the sealed tank through a pipeline, the liquid outlet of the electrically controlled valve and the liquid inlet of the third one-way valve are both provided with regulating pipes, and a seventh connecting pipe is provided at one end of the two regulating pipes close to each other, the left end of the seventh connecting pipe on the right side is threadedly connected to a filter residue bin, and the right end of the seventh connecting pipe on the left side is provided with a filter box, and the filter residue bin is threadedly connected to the filter box.

[0012] As a preferred multi-stage filtration device for stripping liquid production of the present invention, the opposite sides of the two adjusting tubes are fixedly connected with sealing plug rings, and the sealing plug rings are slidably connected inside the sealing plug rings. The two sealing plug rings are fixedly connected with the two seventh connecting tubes respectively, and a connecting hose is arranged between the filter box and the seventh connecting tube located on the left side. The pipe mouths of the connecting hose are fixedly connected with fixing rings, and a plurality of spring rods are arranged between the two fixing rings. The two ends of the spring rods are fixedly connected with the two fixing rings respectively, and the surface of the fixing ring is fixedly connected with the sixth connecting tube, one of the sixth connecting tubes is threadedly connected to the seventh connecting tube located on the left side, and the other of the sixth connecting tubes is threadedly connected to the liquid outlet of the filter residue bin.

[0013] As a preferred multi-stage filtration device for stripping liquid production of the present invention, the locking part includes a fixed clamping block fixedly connected to the surface of the adjusting tube, the fixed clamping block is fixedly connected to the mounting seat via a mounting frame, a first arc groove is provided on the surface of the fixed clamping block, an arc block is slidably connected inside the first arc groove, a second arc groove is provided on the inner wall of the arc block, a convex ring corresponding to the second arc groove is fixedly connected to the surface of the seventh connecting tube, a movable clamping block is hinged on the surface of the fixed clamping block, and a third arc groove matching the convex ring is provided inside the movable clamping block.

[0014] As a preferred multi-stage filtration device for stripping liquid production in the present invention, the T-shaped constraint tube is slidably connected to the inside of the adjusting tube, the surface of the T-shaped constraint tube is sleeved with a first spring, the two ends of the first spring are respectively fixedly connected to the adjusting tube and the T-shaped constraint tube, and the L-shaped constraint rods are fixedly connected to the inner wall of the seventh connecting tube in a circular array.

[0015] As a preferred multi-stage filtration device for stripping liquid production of the present invention, a fifth one-way valve is installed in the circular hole 1 opened on the surface of the regulating tube located on the right side, an air cylinder is arranged above the fifth one-way valve, the fifth one-way valve is fixedly connected to the circular hole 2 opened on the bottom surface of the air cylinder, the fourth one-way valve is fixedly connected to the circular hole 3 opened on the surface of the air cylinder, and a movable plug rod is slidably connected to the inside of the air cylinder.

[0016] As a preferred multi-stage filtration device for stripping liquid production of the present invention, the cleaning assembly includes two scraper rings movably connected to the inside of the sealed tank, a plurality of first scraper plates are arranged in a circular array between the two scraper rings, the two ends of the first scraper plates are respectively fixedly connected to the two scraper rings, and a second scraper plate is fixedly connected to the inside of the scraper ring.

[0017] As a preferred multi-stage filtration device for stripping liquid production of the present invention, a ring groove is provided on the surface of one of the scraper rings, a first magnetic ring is slidably connected to the inside of the ring groove, a friction ring is fixedly connected to the surface of the first magnetic ring, a second spring is arranged in a ring array inside the ring groove, two ends of the second spring are respectively fixedly connected to the first magnetic ring and the scraper ring, and a second magnetic ring is hinged on the surface of the sealing tank.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] By cooperating with several groups of filter assemblies arranged between the sealed tanks, the utilization rate of the filter element of the device can be improved without affecting the filtering efficiency of the device. At the same time, by using the electric control valve, the third one-way valve, the spring rod, the connecting hose, the fixed block, the arc block and the movable block, the filter assembly can complete the cleaning and replacement of the filter element inside the filter box when the device is performing filtering work, and complete the cleaning of the filter residue inside the filter residue bin; BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the installation structure of the piston cylinder in the present invention.

[0023] Figure 3 It is a schematic diagram of the installation structure of the second magnetic ring in the present invention.

[0024] Figure 4 It is a schematic diagram of the installation structure of the connecting hose in the present invention.

[0025] Figure 5 It is a schematic diagram of the installation structure of the fixed card block in the present invention.

[0026] Figure 6 It is a schematic diagram of the installation structure of the T-shaped restraining tube in the present invention.

[0027] Figure 7 For the present invention Figure 6 Magnified view of point A in .

[0028] Figure 8 For the present invention Figure 6 Enlarged view of point B in FIG.

[0029] Fig. 9 It is a schematic diagram of the installation structure of the scraper ring in the present invention.

[0030] Fig.10 It is a schematic diagram of the installation structure of the first scraper plate in the present invention.

[0031] Fig.11 For the present invention Fig.10 Enlarged view of point C in the middle.

[0032] In the figure:

[0033] 101. mounting seat; 102. pre-filter box; 103. buffer flow equalizing cylinder;

[0034] 201, sealing tank; 202, sealing cover; 203, piston cylinder; 204, first one-way valve; 205, second one-way valve; 206, piston block; 207, connecting rod; 208, electric push rod; 209, first connecting pipe; 210, second connecting pipe; 211, third connecting pipe;

[0035] 301, fourth connecting pipe; 302, electric control valve; 303, fifth connecting pipe; 304, filter residue bin; 305, filter box; 306, connecting hose; 307, sixth connecting pipe; 308, fixed ring; 309, spring rod; 310, seventh connecting pipe; 311, convex ring; 312, sealing insert ring; 313, sealing plug ring; 314, regulating pipe; 315, third one-way valve; 316, T-shaped constraint pipe; 317, first spring; 318, L-shaped constraint rod; 319, fixed block; 320, first arc groove; 321, arc block; 322, second arc groove; 323, movable block; 324, air cylinder; 325, movable plug rod; 326, fourth one-way valve; 327, fifth one-way valve; 329, liquid outlet pipe; 330, third arc groove;

[0036] 401, scraper ring; 402, first scraper plate; 403, second scraper plate; 404, annular groove; 405, first magnetic ring; 406, friction ring; 407, second spring; 408, second magnetic ring; DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1: Figure 1-Figure 11As shown, the present invention provides a technical solution, a multi-stage filtering device for stripping liquid production, comprising a mounting seat 101, a pre-filter box 102 mounted on the surface of the mounting seat 101, and a buffer flow equalizing cylinder 103 mounted on the surface of the mounting seat 101, wherein the buffer flow equalizing cylinder 103 is arranged below the pre-filter box 102;

[0039] A number of sealed tanks 201 are equidistantly mounted from right to left on the surface of the mounting seat 101, and a sealing cover 202 is movably connected to the surface of the sealed tank 201, and a number of groups of filter components are arranged between two adjacent sealed tanks 201, and a pressure regulating component for regulating the filtering speed is installed below the pre-filter box 102, and a clamping piece is installed on the surface of the mounting seat 101, and the clamping piece is arranged at both ends of the filter component, and the clamping piece is used for disassembling and assembling a single filter component, and at the same time, a T-shaped constraint tube 316 is arranged inside the clamping piece, and an L-shaped constraint rod 318 is arranged inside the filter component, when the stripping liquid flows in the filter component, the T-shaped constraint tube 316 moves toward the L-shaped constraint rod 318 and engages with it, and is used to resist the force of the filter component perpendicular to the radial direction, and when the stripping liquid does not flow in the filter component, the T-shaped constraint tube 316 and the L-shaped constraint rod 318 are separated, and a cleaning component is arranged inside the sealed tank 201, and the cleaning component includes a first scraper plate 402 and a second scraper plate 403, and the barrel wall of the sealed tank 201 is continuously cleaned during the filtering process.

[0040] like Figures 1 to 11 As shown, the pressure regulating component includes a piston cylinder 203 symmetrically arranged between the pre-filter box 102 and the buffer flow equalizing cylinder 103, the interior of the piston cylinder 203 is slidably connected with a piston block 206, and two circular holes opened on the surface of the piston cylinder 203 are respectively installed with a first one-way valve 204 and a second one-way valve 205, the first one-way valve 204 is connected to the interior of the pre-filter box 102 through a pipeline, the second one-way valve 205 is connected to the interior of the buffer flow equalizing cylinder 103 through a pipeline, and the buffer flow equalizing cylinder 103 is connected to the interior of the sealing tank 201 at the far right through a pipeline.

[0041] like Figures 1 to 11 As shown, an electric push rod 208 is installed on the surface of one of the piston cylinders 203 , a connecting rod 207 is fixedly connected between the two piston blocks 206 , and the end of the output shaft of the electric push rod 208 is fixedly connected to the connecting rod 207 .

[0042] like Figures 1 to 11As shown, the filter assembly includes an electrically controlled valve 302 installed on the barrel wall of the right sealed tank 201 through a pipeline and a third one-way valve 315 installed on the barrel wall of the left sealed tank 201 through a pipeline, and the liquid outlet of the electrically controlled valve 302 and the liquid inlet of the third one-way valve 315 are both provided with a regulating pipe 314, and a seventh connecting pipe 310 is provided at one end of the two regulating pipes 314 close to each other, and the left end of the seventh connecting pipe 310 located on the right side is threadedly connected to the filter residue bin 304, and the right end of the seventh connecting pipe 310 located on the left side is provided with a filter box 305, and the filter residue bin 304 is threadedly connected to the filter box 305.

[0043] like Figures 1 to 11 As shown, the opposite sides of the two regulating tubes 314 are fixedly connected with sealing plug rings 313, and the sealing plug rings 312 are slidably connected inside the sealing plug rings 313. The two sealing plug rings 312 are fixedly connected with the two seventh connecting tubes 310 respectively. A connecting hose 306 is arranged between the filter box 305 and the seventh connecting tube 310 located on the left side. The pipe mouth of the connecting hose 306 is fixedly connected with a fixing ring 308. A plurality of spring rods 309 are arranged between the two fixing rings 308. The two ends of the spring rods 309 are fixedly connected with the two fixing rings 308 respectively. The surface of the fixing ring 308 is fixedly connected with the sixth connecting tube 307, one of the sixth connecting tubes 307 is threadedly connected to the seventh connecting tube 310 located on the left side, and the other sixth connecting tube 307 is threadedly connected in the liquid outlet of the filter residue bin 304.

[0044] like Figures 1 to 11 As shown, the engaging member includes a fixed block 319 fixedly connected to the surface of the adjusting tube 314, the fixed block 319 is fixedly connected to the mounting seat 101 through a mounting frame, a first arc groove 320 is provided on the surface of the fixed block 319, an arc block 321 is slidably connected inside the first arc groove 320, a second arc groove 322 is provided on the inner wall of the arc block 321, a convex ring 311 corresponding to the second arc groove 322 is fixedly connected to the surface of the seventh connecting tube 310, a movable block 323 is hingedly connected to the surface of the fixed block 319, and a third arc groove 330 matching the convex ring 311 is provided inside the movable block 323.

[0045] like Figures 1 to 11 As shown, the T-shaped constraint tube 316 is slidably connected to the inside of the adjusting tube 314, and a first spring 317 is sleeved on the surface of the T-shaped constraint tube 316. The two ends of the first spring 317 are respectively fixedly connected to the adjusting tube 314 and the T-shaped constraint tube 316, and the L-shaped constraint rods 318 are fixedly connected to the inner wall of the seventh connecting tube 310 in a circular array.

[0046] like Figures 1 to 11As shown, a fifth one-way valve 327 is installed in a circular hole 1 opened on the surface of the regulating tube 314 located on the right side, an air cylinder 324 is arranged above the fifth one-way valve 327, the fifth one-way valve 327 is fixedly connected to a circular hole 2 opened on the bottom surface of the air cylinder 324, a fourth one-way valve 326 is fixedly connected to a circular hole 3 opened on the surface of the air cylinder 324, and a movable plug rod 325 is slidably connected to the inside of the air cylinder 324.

[0047] like Figures 1 to 11 As shown, the cleaning assembly includes two scraper rings 401 movably connected inside the sealed tank 201, a plurality of first scraper plates 402 are arranged in a circular array between the two scraper rings 401, both ends of the first scraper plates 402 are respectively fixedly connected to the two scraper rings 401, and a second scraper plate 403 is fixedly connected inside the scraper ring 401.

[0048] like Figures 1 to 11 As shown, an annular groove 404 is provided on the surface of one of the scraper rings 401, a first magnetic ring 405 is slidably connected inside the annular groove 404, a friction ring 406 is fixedly connected to the surface of the first magnetic ring 405, a second spring 407 is arranged in an annular array inside the annular groove 404, two ends of the second spring 407 are respectively fixedly connected to the first magnetic ring 405 and the scraper ring 401, and a second magnetic ring 408 is hinged on the surface of the sealing tank 201.

[0049] like Figures 1 to 11 As shown, it should be noted that: this device is used in conjunction with a controller, and the controller is electrically connected to the electric control valve 302 and the electric push rod 208 through a wire. Its working principle and workflow are well known in the prior art and will not be described in detail here; the pipe mouth can be fixedly connected to the reserved hole through a pipeline connection and installation method, or it can be threadedly connected through a threaded hole. This is well known in the prior art and will not be described in detail; the pre-filter box 102 is composed of a box body and a filter screen, which is convenient for it to filter larger particles of impurities in the stripping liquid; a filter element is arranged inside the filter box 305, and the filtering accuracy of the filter element in different filter boxes 305 can be replaced according to needs, which is convenient for multi-stage filtering of the device; the sealing cover 202 and the filter residue bin 304 are both made of transparent material, which is convenient for observing the filtering condition of the device; a hydraulic sensing device is installed between the pipe connecting the third one-way valve 315 and the sealing tank 201, which is convenient for observing the changes in the filtering efficiency of the filter element inside the corresponding filter box 305;

[0050] Working principle: It is assumed that four sealed cans 201 are installed on the mounting seat 101 of the device from right to left, which are called the first sealed can 201, the second sealed can 201, the third sealed can 201 and the fourth sealed can 201 in sequence. From right to left, three-level filtration with gradually increasing filtration accuracy is arranged in sequence, and each level of filtration is arranged between two adjacent sealed cans 201, and the filtration components between each two adjacent sealed cans 201 are arranged in two groups;

[0051] In this embodiment, the stripping liquid to be filtered is passed into the interior of the pre-filter box 102 for initial filtration. The filtered stripping liquid enters the interior of the piston cylinder 203 through the first connecting pipe 209 and the first one-way valve 204 under the action of gravity, and enters the interior of the buffer flow equalizing cylinder 103 through the second connecting pipe 210 and the second one-way valve 205 under the action of gravity, and enters the interior of the first sealed tank 201 through the third connecting pipe 211. The stripping liquid inside the first sealed tank 201 passes through the fourth connecting pipe 301, the electric control valve 302 threadedly connected in the fourth connecting pipe 301, and the fifth connecting pipe 303 threadedly connected to the liquid outlet of the electric control valve 302 under the action of gravitational potential energy generated by the height difference of the pre-filter box 102, enters the regulating pipe 314 threadedly connected to the surface of the fifth connecting pipe 303, and then enters the filter box 30 through the seventh connecting pipe 310 and the filter residue bin 304. 5, the first stage filtration is performed inside the filter residue bin 304, and the stripping liquid after filtering passes through the sixth connecting pipe 307 threadedly connected to the liquid outlet of the filter box 305, the connecting hose 306, and the sixth connecting pipe 307 and the seventh connecting pipe 310 threadedly connected to the seventh connecting pipe 310, and enters the inside of the regulating pipe 314 threadedly connected to the seventh connecting pipe 310, and then passes through the third one-way valve 315, and enters the inside of the second sealed tank 201 through the pipeline threadedly connected to the third one-way valve 315. After all the stripping liquid filtered by the first stage is mixed inside the second sealed tank 201, it passes through the second stage filtration in the same way to enter the inside of the third sealed tank 201, and enters the inside of the fourth sealed tank 201 after the third stage filtration, and is discharged through the liquid outlet pipe 329 installed on the fourth sealed tank 201 for the next stage of production;

[0052] In this embodiment, when the stripping liquid enters and leaves the sealed tank 201, the flowing stripping liquid pushes the first scraper plate 402, so that the first scraper plate 402 drives the scraper ring 401 and the second scraper plate 403 to rotate. During this process, the second scraper plate 403 and the first scraper plate 402 will continuously scrape the inner wall of the sealed tank 201 to clean the filtered matter on the inner wall of the sealed tank 201, and a part of the scraped filtered matter will enter the interior of the filter residue bin 304 along with the flowing stripping liquid.

[0053] In this embodiment, if it is not necessary to clean the inner wall of the sealed tank 201, the second magnetic ring 408 hinged on the surface of the sealed tank 201 can be rotated to be close to the friction ring 406. Through the action of magnetic force, the first magnetic ring 405 drives the friction ring 406 to be squeezed toward the inner wall of the sealed tank 201 until the friction ring 406 protrudes from the inside of the annular groove 404 and is squeezed on the inner wall of the sealed tank 201 by the first magnetic ring 405. Through the friction between the friction ring 406 and the inner wall of the sealed tank 201, the scraping ring 401 can resist the flow impact force of the stripping liquid inside the sealed tank 201, thereby stopping the rotation or slowly rotating to reduce the wear of the components.

[0054] In this embodiment, when the hydraulic pressure sensing device on the third one-way valve 315 detects that the pressure at the outlet of one of the filter boxes 305 is weakened to a set value, the controller controls the corresponding electric control valve 302 to be adjusted to a closed state, and the liquid cannot be filtered through the filter box 305. At this time, by making the movable plug rod 325 reciprocate inside the air cylinder 324, the air outside the air cylinder 324 enters the interior of the air cylinder 324 through the fourth one-way valve 326, and enters the corresponding regulating pipe 314 through the fifth one-way valve 327, so that the regulating pipe 314, the seventh connecting pipe 310, and the filter residue bin 3 04 and the remaining stripping liquid in the filter box 305 is pumped into the corresponding sealing tank 201 through the third one-way valve 315. At this time, the movable block 323 buckled on the surface of the fixed block 319 can be opened, and the spring rod 309 can be compressed to separate the sealing plug ring 313 from the sealing plug ring 312. At this time, all the components from the two seventh connecting pipes 310 to the middle filter box 305 and the filter residue bin 304 can be taken out of the device, and the filter box 305 and the filter residue bin 304 can be threadedly opened to clean the filtered material in the filter residue bin 304, and at the same time, the filter element in the filter box 305 can be cleaned or replaced;

[0055] In this embodiment, after the filter element inside the filter box 305 is replaced, the convex ring 311 on the seventh connecting pipe 310 can be embedded in the second arc groove 322 inside the arc block 321 by compressing the spring rod 309, and the spring rod 309 is relaxed. Under the action of the elastic potential energy of the spring rod 309, the sealing plug rings 312 located at the ends of the two seventh connecting pipes 310 are inserted into the interior of the sealing plug ring 313 under the guidance of the arc block 321 and the first arc groove 320, and keep a tight fit under the action of the elastic potential energy of the spring rod 309, and then the movable block 323 on the surface of the fixed block 319 is buckled and locked. At this time, the seventh connecting pipe 310 is fixed on the fixed block 319 through the cooperation of the second arc groove 322, the convex ring 311 and the third arc groove 330, that is, the working stability of the filter residue bin 304 and the filter box 305 is guaranteed;

[0056] In this embodiment, when stripping liquid flows inside the regulating tube 314, the flowing stripping liquid will drive the T-shaped constraint tube 316 to move in the direction of compressing the first spring 317. During this process, the T-shaped constraint tube 316 will protrude from the inside of the regulating tube 314 and extend to the inside of the corresponding seventh connecting tube 310. The free end of the L-shaped constraint rod 318 will be inserted into the inside of the T-shaped constraint tube 316, and the surface of the L-shaped constraint rod 318 will fit with the inner wall of the T-shaped constraint tube 316. At this time, even if the movable block 323 is in the open state, the sealing plug ring 313 and the sealing plug ring 312 are not subjected to force in the direction perpendicular to the axial direction, and maintain a good tight fit state.

[0057] In this embodiment, in order to increase the filtering efficiency of the device, the controller can control the extension and retraction speed of the electric push rod 208, so that the piston block 206 continuously reciprocates inside the piston cylinder 203, thereby accelerating the stripping liquid in the pre-filter box 102 to flow into the buffer flow equalizing cylinder 103;

[0058] Embodiment 2: Based on embodiment 1, a number of filter components exceeding the production requirement can be arranged between two adjacent sealed tanks 201. When filtering, when the filtering efficiency of a certain filter component is low and affects the filtering efficiency of the device, the filter element of the filter component can be replaced. The controller opens the electric control valve 302 corresponding to the unactivated filter component of the same level to maintain the filtering efficiency of the device, and the filter component with low filtering efficiency continues to be used until the filter element reaches the replacement requirement. This method can make fuller use of the filter element.

[0059] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multi-stage filtering device for stripping liquid production, comprising a mounting seat (101), a pre-filter box (102) mounted on the surface of the mounting seat (101), and a buffer flow-distributing cylinder (103) mounted on the surface of the mounting seat (101), wherein the buffer flow-distributing cylinder (103) is arranged below the pre-filter box (102); Features: A plurality of sealed cans (201) are equidistantly mounted on the surface of the mounting seat (101) from right to left, a sealing cover (202) is movably connected to the surface of the sealed can (201), a plurality of groups of filter components are arranged between two adjacent sealed cans (201), a pressure regulating component for regulating the filtering speed is arranged below the pre-filter box (102), a clamping piece is mounted on the surface of the mounting seat (101), the clamping piece is arranged at both ends of the filter component, the clamping piece is used for disassembling and assembling a single filter component, and a T-shaped restraining tube (316) is arranged inside the clamping piece. An L-shaped constraint rod (318) is arranged inside the filter assembly. When the stripping liquid flows in the filter assembly, the T-shaped constraint tube (316) moves toward the L-shaped constraint rod (318) and engages with it, so as to resist the force perpendicular to the radial direction of the filter assembly. When the stripping liquid does not flow in the filter assembly, the T-shaped constraint tube (316) and the L-shaped constraint rod (318) are separated. A cleaning assembly is arranged inside the sealed tank (201). The cleaning assembly comprises a first scraper plate (402) and a second scraper plate (403), and the barrel wall of the sealed tank (201) is continuously cleaned during the filtering process. The pressure regulating component comprises a piston cylinder (203) symmetrically arranged between the pre-filter box (102) and the buffer flow equalizing cylinder (103); the interior of the piston cylinder (203) is slidably connected with a piston block (206); two circular holes opened on the surface of the piston cylinder (203) are respectively installed with a first one-way valve (204) and a second one-way valve (205); the first one-way valve (204) is connected to the interior of the pre-filter box (102) through a pipeline; the second one-way valve (205) is connected to the interior of the buffer flow equalizing cylinder (103) through a pipeline; and the buffer flow equalizing cylinder (103) is connected to the interior of the rightmost sealing tank (201) through a pipeline; An electric push rod (208) is mounted on the surface of one of the piston cylinders (203), a connecting rod (207) is fixedly connected between the two piston blocks (206), and the end of the output shaft of the electric push rod (208) is fixedly connected to the connecting rod (207); The filter assembly comprises an electrically controlled valve (302) installed on the barrel wall of the sealed tank (201) on the right side through a pipeline, and a third one-way valve (315) installed on the barrel wall of the sealed tank (201) on the left side through a pipeline, the liquid outlet of the electrically controlled valve (302) and the liquid inlet of the third one-way valve (315) are both provided with a regulating pipe (314), a seventh connecting pipe (310) is provided at one end of the two regulating pipes (314) close to each other, a filter residue bin (304) is threadedly connected to the left end of the seventh connecting pipe (310) on the right side, and a filter box (305) is provided at the right end of the seventh connecting pipe (310) on the left side, and the filter residue bin (304) is threadedly connected to the filter box (305); The two regulating tubes (314) are fixedly connected to opposite sides thereof with sealing plug rings (313), the sealing plug rings (312) are slidably connected inside the sealing plug rings (313), the two sealing plug rings (312) are fixedly connected to the two seventh connecting tubes (310) respectively, a connecting hose (306) is provided between the filter box (305) and the seventh connecting tube (310) located on the left, the pipe opening of the connecting hose (306) is fixedly connected to a fixing ring (308), a plurality of spring rods (309) are provided between the two fixing rings (308), the two ends of the spring rods (309) are fixedly connected to the two fixing rings (308) respectively, the surface of the fixing ring (308) is fixedly connected to the sixth connecting tube (307), one of the sixth connecting tubes (307) is threadedly connected to the seventh connecting tube (310) located on the left, and the other sixth connecting tube (307) is threadedly connected to the liquid outlet of the filter residue bin (304); The engaging member comprises a fixed clamping block (319) fixedly connected to the surface of the regulating tube (314); the fixed clamping block (319) is fixedly connected to the mounting seat (101) via a mounting frame; a first arc-shaped groove (320) is provided on the surface of the fixed clamping block (319); an arc-shaped block (321) is slidably connected inside the first arc-shaped groove (320); a second arc-shaped groove (322) is provided on the inner wall of the arc-shaped block (321); a convex ring (311) corresponding to the second arc-shaped groove (322) is fixedly connected to the surface of the seventh connecting tube (310); a movable clamping block (323) is hingedly connected to the surface of the fixed clamping block (319); a third arc-shaped groove (330) matching the convex ring (311) is provided inside the movable clamping block (323); The T-shaped constraint tube (316) is slidably connected to the inside of the regulating tube (314); a first spring (317) is sleeved on the surface of the T-shaped constraint tube (316); two ends of the first spring (317) are respectively fixedly connected to the regulating tube (314) and the T-shaped constraint tube (316); and the L-shaped constraint rods (318) are fixedly connected to the inner wall of the seventh connecting tube (310) in an annular array; A fifth one-way valve (327) is installed in a circular hole 1 opened on the surface of the regulating tube (314) located on the right side, a gas cylinder (324) is arranged above the fifth one-way valve (327), the fifth one-way valve (327) is fixedly connected to a circular hole 2 opened on the bottom surface of the gas cylinder (324), a fourth one-way valve (326) is fixedly connected to a circular hole 3 opened on the surface of the gas cylinder (324), and a movable plug rod (325) is slidably connected to the inside of the gas cylinder (324); The cleaning assembly comprises two scraper rings (401) movably connected to the inside of the sealing tank (201), a plurality of first scraper plates (402) are arranged in a ring array between the two scraper rings (401), two ends of the first scraper plates (402) are respectively fixedly connected to the two scraper rings (401), and a second scraper plate (403) is fixedly connected inside the scraper ring (401); An annular groove (404) is provided on the surface of one of the scraping rings (401), a first magnetic ring (405) is slidably connected inside the annular groove (404), a friction ring (406) is fixedly connected to the surface of the first magnetic ring (405), second springs (407) are arranged in an annular array inside the annular groove (404), two ends of the second springs (407) are respectively fixedly connected to the first magnetic ring (405) and the scraping ring (401), and a second magnetic ring (408) is hingedly connected to the surface of the sealing can (201).

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