Extraction and filtration device convenient for magnetic bar installation

Abstract

The invention relates to the technical field of battery processing, in particular to an extraction and filtration device convenient for magnetic bar installation, the extraction and filtration device comprises an extraction box and a rear magnetic suction device, an extraction cavity for preventing extract liquor is arranged in the extraction box, and a guide roll shaft in the extraction cavity guides a diaphragm to penetrate through the extract liquor. According to the extraction and filtration device convenient for mounting the magnetic bar, provided by the invention, the extraction liquid can be filtered by utilizing the rear magnetic suction device, the front filtration device and the magnetic bar device which are mounted on the extraction box, so that magnetic substances and other impurities in the extraction liquid are removed; the rear magnetic suction device, the front filtering device and the magnetic bar device are convenient to replace and clean, and the filtering effect of the magnetic bar device on the extracting solution is more stable, so that the problems that the existing filtering equipment for extraction is poor in magnetic substance filtering capability and a magnetic bar is difficult to replace are solved; magnetic substances attached to the surface of the diaphragm can be effectively reduced, and the performance of the lithium ion battery is improved.

Description

Technical Field

[0001] The invention relates to the technical field of battery processing, in particular to an extraction and filtering device which is convenient for installing a magnetic rod. Background Art

[0002] Lithium-ion battery separators can separate the positive and negative electrodes of the battery through their own closed-cell function, thereby preventing the positive and negative electrodes from directly contacting and causing a circuit break. When making separators for lithium-ion batteries using the wet method, polyolefin resin and low molecular weight white oil are first mixed and melt-extruded, and the thickness and uniformity of the film are optimized through a biaxial stretching process. Then, dichloromethane is used as an extractant to extract the white oil in the pores of the separator, thereby forming micropores on the separator, which will allow the electrolyte ions in the lithium-ion battery to pass freely to form a discharge circuit.

[0003] However, in the existing extraction process, the residues in the dichloromethane used are easy to enter the magnetic substances, and these magnetic substances are easy to adhere to the surface of the diaphragm during the extraction process, thereby reducing the pressure resistance of the diaphragm and affecting the quality of the lithium-ion battery. Therefore, it is necessary to filter the dichloromethane extract used in the extraction process. For example, the patent with the authorization announcement number CN209890432U and the patent name of a self-cleaning device suitable for wet-process lithium-ion battery diaphragm extraction equipment provides a self-cleaning device, which can use magnetic filters, Y-type filters and microporous filters to filter magnetic substances and other impurities in the extract, but the patent does not provide a detailed design of the internal structure of the magnetic filter, Y-type filter and microporous filter used. The magnetic filter in the prior art generally inserts a magnetic rod into a container, so that the solution flows near the magnetic rod and uses the magnetic rod to adsorb and filter the magnetic substance. However, due to the unreasonable structural design of these magnetic filters, the extract can flow out at a position far away from the magnetic rod, resulting in the ability to filter the magnetic substance will be greatly reduced when the flow rate of the extract increases or the magnetic force of the magnetic rod decays. At the same time, the magnetic rod is not easy to replace, so it is difficult to meet the filtration requirements of diaphragm extraction.

[0004] Therefore, we need an extraction and filtration device that is easy to install a magnetic rod to solve the problem that the existing extraction and filtration equipment has poor ability to filter magnetic substances and is difficult to replace the magnetic rod. This can effectively reduce the magnetic substances attached to the surface of the diaphragm and improve the performance of the lithium-ion battery. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing extraction filtering equipment has poor ability to filter magnetic substances and is difficult to replace the magnetic rod. The present application provides an extraction filtering device that is easy to install the magnetic rod, which can effectively reduce the magnetic substances attached to the surface of the diaphragm and improve the performance of the lithium-ion battery.

[0006] To achieve the above object, the present invention provides the following technical solution: an extraction and filtration device that is convenient for installing a magnetic rod, comprising:

[0007] An extraction box, wherein an extraction chamber for preventing extraction liquid from flowing is arranged in the extraction box, and a guide roller is used in the extraction chamber to guide the diaphragm to pass through the extraction liquid;

[0008] A rear magnetic device is provided on the extraction box at a position intersecting with the guide roller, and the rear magnetic device includes a magnetic column inserted into the extraction chamber for absorbing magnetic substances in the extraction liquid;

[0009] A docking box is installed at the front end of the extraction box and is used to inject extraction liquid into the extraction box. A pre-filter device for filtering the extraction liquid is provided in the docking box, and a magnetic rod device for adsorbing magnetic substances in the extraction liquid is inserted in the pre-filter device.

[0010] Preferably, a drainage pump for extracting the extraction liquid in the extraction chamber is installed at the rear end of the extraction box, and an auxiliary motor for driving the guide roller to rotate is fixedly installed on the extraction box.

[0011] Preferably, the rear magnetic device includes a plug-in column for fixing the magnetic column and sealingly installing it with the extraction box, and the surface of the magnetic column is blade-shaped or wavy, and the end of the magnetic column is provided with a sealing rubber ring for clamping into the extraction box for sealing and preventing the magnetic column from falling off, and the end of the plug-in column is integrally formed with a first pull handle for conveniently pulling out the plug-in column.

[0012] Preferably, the extraction box is provided with a quick locking device for fixing the rear magnetic suction device, and the quick locking device includes a connecting seat fixedly mounted on the extraction box, and a main sleeve for inserting the plug-in column is integrally formed on the connecting seat, and a docking plate is integrally formed at the end of the main sleeve, an end cover for fitting the docking plate is provided at the end of the plug-in column, and a C-shaped block is hingedly mounted on the docking plate, the C-shaped block is connected to the docking plate through a first torsion spring, and the upper end of the C-shaped block is used to press the end cover onto the docking plate, a rotating extrusion ring is threadedly mounted on the main sleeve, and the bottom of the rotating extrusion ring is used to change the rotational position of the C-shaped block relative to the docking plate by squeezing the lower end of the C-shaped block.

[0013] Preferably, a locking motor is fixedly mounted on the connecting seat, and an output end of the locking motor drives a driving wheel, and a driven gear ring meshing with the driving wheel is fixedly mounted on the rotating extrusion ring.

[0014] Preferably, a limiting groove is provided on the end cover, and a positioning protrusion which is plugged into the limiting groove and is used to prevent the end cover from rotating is fixedly installed on the docking plate.

[0015] Preferably, the docking box includes a main box body fixedly installed at the front end of the extraction box by bolts, and a liquid inlet pipe for connecting to an external extraction liquid supply device is provided at the front end of the main box body, and the interior of the main box body is connected to the extraction chamber through a drain port.

[0016] Preferably, the pre-filter device includes a bottom plate fixedly mounted on the main housing, and a double-layer sleeve consisting of an inner and outer sleeve inserted into the inside of the main housing is installed on the bottom plate through a supporting column, a top filter membrane and a bottom filter membrane are respectively installed at the upper and lower ends of the double-layer sleeve, the outer side of the top filter membrane is connected with the drain port, and a waste liquid cavity for collecting filtered waste is provided between the outer side of the bottom filter membrane and the bottom plate, the liquid inlet pipe is connected with the waste liquid cavity through a liquid guide cavity, and a waste discharge valve for discharging waste in the waste liquid cavity is installed on the bottom plate, a spiral flow channel for connecting the top filter membrane and the bottom filter membrane is formed between the inner and outer sleeves of the double-layer sleeve through a spiral sheet, and the magnetic rod device includes a connecting plate installed on the top of the double-layer sleeve through a fixing device, and an inserted magnetic rod inserted into the spiral flow channel for adsorbing magnetic substances in the extract is fixedly installed at the bottom of the connecting plate.

[0017] Preferably, a stirring motor is installed at the center of the double-layer sleeve, and a stirring paddle is provided at the output end of the stirring motor for stirring the solution in the waste liquid chamber, a centering column for positioning the bottom plate is provided on the main box body, and a second pull handle is fixedly installed on the bottom plate, an annular mating groove is provided on the bottom plate, and an annular mating protrusion which is plugged into the annular mating groove and serves as a seal is provided at the bottom of the main box body.

[0018] Preferably, the fixing device includes a center column fixedly installed at the center of the double-layer sleeve, and a rotating seat is rotatably installed on the top of the center column, and the rotating seat and the center column are connected by a second torsion spring, and the rotating seat is provided with a turning handle for convenient rotation of the rotating seat, and the rotating seat is provided with a C-shaped clamping plate for clamping the connecting plate to the top of the double-layer sleeve, and the connecting plate is provided with a guide hole for facilitating the end of the C-shaped clamping plate to pass through.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention proposes an extraction and filtering device that is easy to install a magnetic rod. The device can use a post-magnetic suction device, a pre-filtering device and a magnetic rod device installed on an extraction box to complete the filtering of the extract, thereby removing magnetic substances and other impurities in the extract. The post-magnetic suction device, the pre-filtering device and the magnetic rod device are easy to replace and clean, and the filtering effect of the magnetic rod device on the extract is more stable, thereby solving the problem that the existing extraction filtering equipment has poor ability to filter magnetic substances and is difficult to replace the magnetic rod. The device can effectively reduce the magnetic substances attached to the surface of the diaphragm and improve the performance of the lithium-ion battery. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 It is a side view of the structure of the present invention;

[0023] Figure 3 It is a cross-sectional view of the structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the installation of the rear magnetic attraction device and the quick locking device of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the quick locking device of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the rear magnetic attraction device of the present invention;

[0027] Figure 7 It is a schematic diagram of the installation of the pre-filter device and the docking box of the present invention;

[0028] Figure 8 It is a cross-sectional view of the installation of the pre-filter device and the docking box of the present invention;

[0029] Fig. 9 is a cross-sectional view of the pre-filter device of the present invention;

[0030] Fig.10 It is a schematic diagram of the installation of the magnetic rod device and the spiral sheet of the present invention.

[0031] In the figure: 1. extraction box; 2. rear magnetic device; 201. first pull handle; 202. end cover; 203. limit groove; 204. plug-in column; 205. magnetic column; 206. sealing rubber ring; 3. magnetic rod device; 301. guide hole; 302. connecting plate; 303. plug-in magnetic rod; 4. quick locking device; 401. connecting seat; 402. main sleeve; 403. positioning protrusion; 404. rotating extrusion ring; 405. docking plate; 406. C-shaped block; 407. locking motor; 408. driving wheel; 409. driven gear ring; 410. first torsion spring; 5. second pull handle; 6. fixing device; 601. rotating handle; 602. C-shaped card plate; 603, rotating seat; 604, second torsion spring; 605, center column; 7, pre-filter device; 701, top filter membrane; 702, double-layer sleeve; 703, stirring motor; 704, bottom filter membrane; 705, stirring paddle; 706, waste liquid chamber; 707, bottom plate; 8, docking box; 801, drain port; 802, main box body; 803, liquid guide chamber; 804, liquid inlet pipe; 9, spiral flow channel; 10, spiral sheet; 11, annular matching groove; 12, waste valve; 13, annular matching protrusion; 14, drain pump; 15, auxiliary motor; 16, diaphragm; 17, extraction chamber; 18, guide roller; 19, centering column. DETAILED DESCRIPTION

[0032] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit 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.

[0033] Example 1: Please refer to Figures 1 to 10 The present invention provides an extraction and filtration device that is easy to install a magnetic rod, including an extraction box 1, a rear magnetic attraction device 2 and a docking box 8. The extraction box 1 is provided with an extraction chamber 17 for preventing the extraction liquid from leaking, and the extraction chamber 17 is provided with a guide roller 18 to guide a diaphragm 16 to pass through the extraction liquid. A drainage pump 14 for extracting the extraction liquid in the extraction chamber 17 is installed at the rear end of the extraction box 1, and an auxiliary motor 15 for driving the guide roller 18 to rotate is fixedly installed on the extraction box 1. After the diaphragm 16 passes through the extraction liquid, the white oil located on the surface of the diaphragm 16 is extracted from the extracted liquid, wherein the diaphragm 16 is a lithium-ion battery diaphragm, and the extraction liquid in the extraction chamber 17 can be discharged by the drainage pump 14 and then recovered.

[0034] See also Figure 1 , Figure 3 , Figure 4, Figure 5 and Figure 6, a rear magnetic device 2 is provided on the extraction box 1 at a position staggered with the guide roller 18, and the rear magnetic device 2 includes a magnetic column 205 inserted into the extraction chamber 17 for adsorbing magnetic substances in the extraction liquid, and the rear magnetic device 2 includes a plug-in column 204 for fixing the magnetic column 205 and sealingly installed with the extraction box 1, and the surface of the magnetic column 205 is blade-shaped or wavy. The special shape of the surface of the magnetic column 205 can effectively increase the contact area with the extraction liquid, so that the magnetic substance in the extraction liquid has more adsorbable area, and the wrinkles formed on the surface of the magnetic column 205 can also effectively prevent the magnetic substance adsorbed on the magnetic column 205 from being washed away by the extraction liquid again, so that the magnetic substances in the extraction liquid can be effectively adsorbed. The substance is adsorbed and filtered, and the magnetic column 205 can also be an electromagnet to obtain a stronger magnetic effect, and the end of the magnetic column 205 is provided with a sealing rubber ring 206 for being stuck into the extraction box 1 for sealing and preventing the magnetic column 205 from falling off. After the sealing rubber ring 206 is inserted into the extraction box 1, it can be effectively inserted into the extraction box 1, thereby preventing the magnetic column 205 from shaking or even falling off under the push of the extraction liquid, and at the same time, it can also prevent the extraction liquid from entering the contact position between the end of the magnetic column 205 and the extraction box 1, so that the influence of the thermal expansion and contraction of the extraction liquid on the end position of the magnetic column 205 can be effectively avoided. The end of the plug-in column 204 is integrally formed with a first pull handle 201 for conveniently pulling out the plug-in column 204, and the operator can The rear magnetic device 2 is lifted by the first pull handle 201, and a quick locking device 4 for fixing the rear magnetic device 2 is provided on the extraction box 1, and the quick locking device 4 includes a connecting seat 401 fixedly installed on the extraction box 1, and a main sleeve 402 for inserting the plug-in column 204 is integrally formed on the connecting seat 401, and a docking plate 405 is integrally formed at the end of the main sleeve 402, and an end cover 202 for fitting the docking plate 405 is provided at the end of the plug-in column 204, and a C-shaped block 406 is hingedly installed on the docking plate 405, and the C-shaped block 406 is connected to the docking plate 405 through a first torsion spring 410, and the upper end of the C-shaped block 406 is used to press the end cover 202 onto the docking plate 405, and a rotating The rotating extrusion ring 404 is used to change the rotational position of the C-shaped block 406 relative to the docking plate 405 by squeezing the lower end of the C-shaped block 406. When the rear magnetic device 2 needs to be installed, the rotating extrusion ring 404 is first rotated to move the rotating extrusion ring 404 to the side close to the docking plate 405. At this time, the C-shaped block 406 will not be subjected to the thrust from the rotating extrusion ring 404. Therefore, the C-shaped block 406 will rotate downward under the drive of the first torsion spring 410, so that the top of the C-shaped block 406 moves toward the side away from the docking plate 405. Then, the magnetic column 205 is correctly inserted into the extraction box 1 from the center of the main sleeve 402, and then the rotating extrusion ring 404 is rotated in the opposite direction.Thus, the rotating extrusion ring 404 can move toward the side away from the docking plate 405, so that the lower end of the C-shaped block 406 will be subjected to the extrusion force from the rotating extrusion ring 404, so that the lower end of the C-shaped block 406 moves in the direction away from the main sleeve 402, which enables the upper end of the C-shaped block 406 to be clamped on the end cover 202, thereby pressing the end cover 202 tightly on the docking plate 405, realizing the rapid fixation of the rear magnetic attraction device 2, and having a faster fixing speed than the traditional method of fixing with a large number of bolts.

[0035] See also Figure 1 , Figure 2 , Figure 3 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 The docking box 8 is installed at the front end of the extraction box 1 and is used to inject the extraction liquid into the extraction box 1, and a pre-filter device 7 for filtering the extraction liquid is arranged in the docking box 8, and a magnetic rod device 3 for adsorbing the magnetic substance in the extraction liquid is inserted in the pre-filter device 7. The docking box 8 includes a main box body 802 fixedly installed at the front end of the extraction box 1 by bolts, and a liquid inlet pipe 804 for connecting an external extraction liquid supply device is arranged at the front end of the main box body 802. The interior of the main box body 802 is connected with the extraction chamber 17 through a drain port 801. The docking box 8 can use the external extraction liquid supply device to inject the extraction liquid into the extraction chamber 17, and when the extraction liquid passes through the docking box 8, the magnetic substance and other impurities in the extraction liquid are adsorbed and filtered through the pre-filter device 7 and the magnetic rod device 3, thereby effectively ensuring the purity of the extraction liquid entering the extraction chamber 17.

[0036] See also Figure 1 , Figure 3 , Figure 7 , Figure 8 , Fig. 9 and Fig.10The pre-filter device 7 includes a bottom plate 707 fixedly mounted on the main box body 802, and a double-layer sleeve 702 consisting of two inner and outer sleeves inserted into the main box body 802 is installed on the bottom plate 707 through a support column, and a top filter membrane 701 and a bottom filter membrane 704 are installed at the upper and lower ends of the double-layer sleeve 702, respectively, the outer side of the top filter membrane 701 is connected to the drain port 801, and a waste liquid cavity 706 for collecting filtered waste is provided between the outer side of the bottom filter membrane 704 and the bottom plate 707, and the liquid inlet pipe 804 is connected to the waste liquid cavity 706 through the liquid guide cavity 803. A waste valve 12 for discharging waste in the waste liquid chamber 706 is installed on the bottom plate 707. A spiral flow channel 9 for connecting the top filter membrane 701 and the bottom filter membrane 704 is formed between the inner and outer sleeves of the double-layer sleeve 702 through a spiral sheet 10. The magnetic rod device 3 includes a connecting plate 302 installed on the top of the double-layer sleeve 702 through a fixing device 6, and an inserted magnetic rod 303 inserted into the spiral flow channel 9 for adsorbing the magnetic substance in the extract is fixedly installed at the bottom of the connecting plate 302. When the external device sends the extract from the liquid inlet pipe 804 into the guide pipe, the magnetic rod 303 is inserted into the spiral flow channel 9. After entering the liquid chamber 803, the extract will move from the liquid guide chamber 803 to the waste liquid chamber 706, and then the extract will pass through the bottom filter membrane 704 from the waste liquid chamber 706 into the spiral flow channel 9, and then pass through the top filter membrane 701 into the drain port 801 and finally flow into the extraction chamber 17. In this process, the impurities filtered out by the bottom filter membrane 704 will remain in the waste liquid chamber 706 and will be discharged regularly through the waste valve 12. When the extract passes through the spiral flow channel 9, the magnetic material will be adsorbed by the inserted magnetic rod 303. The spiral flow channel 9 can maximize the adhesion of the extract to the liquid. The surface of the inserted magnetic rod 303 passes through, so that the magnetic material can be better adsorbed, preventing the inserted magnetic rod 303 from insufficiently adsorbing the magnetic material due to the extraction liquid flow rate being too high, the magnetic force of the inserted magnetic rod 303 being too small, or the extraction liquid being too far away from the inserted magnetic rod, thereby causing the magnetic material to be unable to be completely removed. At the same time, the impurities generated after passing through the top filter membrane 701 again will also stay in the spiral flow channel 9, so when the inserted magnetic rod 303 needs to be replaced or the inside of the pre-filter device 7 needs to be cleaned, it can also be cleaned conveniently and quickly. Specifically, when it is necessary to clean the pre-filter device 7 and replace the inserted magnetic rod 303, first separate the pre-filter device 7 from the docking box 8, wherein the bottom plate 707 and the main box body 802 can be fixed by detachable bolt connection, snap connection, etc., then remove the magnetic rod device 3 from the double-layer sleeve 702, and then replace the magnetic rod device 3 as a whole. While replacing the magnetic rod device 3, impurities located in the spiral flow channel 9 can also be discharged through the hole originally used to insert the wipeable magnetic rod 303, thereby achieving the cleaning of magnetic substances and other impurities located in the spiral flow channel 9.

[0037] See also Figures 8 to 10 The fixing device 6 includes a central column 605 fixedly installed at the center of the double-layer sleeve 702, and a rotating seat 603 is rotatably installed on the top of the central column 605, and the rotating seat 603 and the central column 605 are connected by a second torsion spring 604, and a rotating handle 601 is provided on the rotating seat 603 for facilitating the rotation of the rotating seat 603, and a C-shaped clamping plate 602 is provided on the rotating seat 603 for clamping the connecting plate 302 on the top of the double-layer sleeve 702, and a guide hole 301 is provided on the connecting plate 302 for facilitating the end of the C-shaped clamping plate 602 to pass through. When it is necessary to install the magnetic rod device 3 and fix the magnetic rod device 3 through the fixing device 6, first, correctly insert the inserted magnetic rod 303 into the spiral flow channel 9, and at the same time rotate the handle 601 so that the top of the C-shaped clamping plate 602 can pass through the guide hole 301, and then fit the connecting plate 302 on the top of the double-layer sleeve 702. At this time, rotate the handle 601 again to make the C-shaped clamping plate 602 move to a preset position offset from the guide hole 301, and then the C-shaped clamping plate 602 can be maintained at this position under the push of the second torsion spring 604, and the upper and lower ends of the C-shaped clamping plate 602 are respectively clamped on the upper end of the connecting plate 302 and the lower end of the top position of the double-layer sleeve 702, so that the connecting plate 302 can be fixed. This fixing method is simple and quick, and can effectively improve the installation efficiency of the magnetic rod device 3.

[0038] The extraction filter designed in this embodiment can utilize the post-magnetic device 2, the pre-filter device 7 and the magnetic rod device 3 installed on the extraction box 1 to complete the filtration of the extract, thereby removing the magnetic substances and other impurities in the extract, and the post-magnetic device 2, the pre-filter device 7 and the magnetic rod device 3 are easy to replace and clean, and the magnetic rod device 3 has a more stable filtering effect on the extract, thereby solving the problem that the existing extraction filtering equipment has poor ability to filter magnetic substances and it is difficult to replace the magnetic rod, and can effectively reduce the magnetic substances attached to the surface of the diaphragm to improve the performance of the lithium-ion battery.

[0039] Example 2: Please refer to Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6On the basis of the first embodiment, a locking motor 407 is fixedly mounted on the connecting seat 401, and a driving wheel 408 is driven at the output end of the locking motor 407, and a driven gear ring 409 meshing with the driving wheel 408 is fixedly mounted on the rotating extrusion ring 404. The locking motor 407 can directly drive the rotating extrusion ring 404 to rotate, so that the rotating extrusion ring 404 is driven by the thread to move up and down along the main sleeve 402 when rotating, so that the position of the C-shaped block 406 can be quickly changed, In order to quickly replace the rear magnetic suction device 2, a limiting groove 203 is provided on the end cover 202, and a positioning protrusion 403 which cooperates with the limiting groove 203 and is used to prevent the end cover 202 from rotating is fixedly installed on the docking plate 405. When installing the rear magnetic suction device 2, it is only necessary to align the positioning protrusion 403 with the limiting groove 203 and insert it, which further solves the problem that the existing extraction filtering equipment has poor ability to filter magnetic substances and is difficult to replace the magnetic rod, and can effectively reduce the magnetic substances attached to the surface of the diaphragm and improve the performance of the lithium-ion battery.

[0040] Example 3: Please refer to Figures 7 to 9 On the basis of the second embodiment, a stirring motor 703 is installed at the center of the double-layer sleeve 702, and a stirring paddle 705 for stirring the solution in the waste liquid chamber 706 is provided at the output end of the stirring motor 703. The stirring paddle 705 is driven to rotate by the stirring motor 703, so that the impurities in the waste liquid chamber 706 are always in a moving state, so that it is not easy for the impurities to precipitate and adhere to the surface of the bottom filter membrane 704, thereby avoiding the clogging of the bottom filter membrane 704 by the impurities. A centering column 19 for positioning the bottom plate 707 is provided on the main box body 802, and a second pull handle 5 is fixedly installed on the bottom plate 707. The centering column 19 is used to guide the insertion direction of the pre-filter device 7 during installation. At the same time, the top of the centering column 19 can also be screwed with a mounting nut to fix the bottom plate 707 on the main box body 802. An annular matching groove 11 is provided on the bottom plate 707, and the bottom of the main box body 802 is provided with an annular matching protrusion 13 which is plugged into the annular matching groove 11 and plays a sealing role. The annular matching protrusion 13 can effectively prevent the leakage of waste liquid in the waste liquid chamber 706, further solving the problem that the existing extraction filtering equipment has poor ability to filter magnetic substances and is difficult to replace the magnetic rod, and can effectively reduce the magnetic substances attached to the surface of the diaphragm to improve the performance of the lithium-ion battery.

[0041] Embodiment 4: Based on Embodiment 3, the present invention further provides a method for using an extraction and filtration device that is convenient for installing a magnetic rod, comprising the following steps:

[0042] Step 1: first insert the rear magnetic device 2 into the main sleeve 402, then push the C-shaped block 406 by rotating the extrusion ring 404 to fix the rear magnetic device 2 to the extraction box 1, then insert the magnetic rod device 3 into the spiral flow channel 9, then fix the magnetic rod device 3 to the pre-filter device 7 through the fixing device 6, then insert the pre-filter device 7 into the main box body 802, and fix the pre-filter device 7 to the main box body 802;

[0043] Step 2: correctly wind the diaphragm 16 onto the guide roller 18, then close the top of the extraction box 1, and then inject the extraction liquid into the docking box 8 through the external extraction liquid supply device. The extraction liquid entering the docking box 8 is filtered by the pre-filter device 7 and the magnetic rod device 3 and then sent to the extraction chamber 17. When the extraction chamber 17 is filled with the extraction liquid, turn on the drainage pump 14 to maintain the liquid level of the extraction liquid in the extraction chamber 17 unchanged, and use the guide roller 18 to drive the diaphragm 16 to move at a constant speed for continuous extraction;

[0044] Step 3: When the extraction is completed or the equipment needs maintenance, the extraction work is stopped. At this time, the external extraction liquid supply device no longer supplies extraction liquid to the docking box 8. At the same time, the drainage pump 14 is used to extract all the extraction liquid in the extraction chamber 17. Then, the rear magnetic suction device 2 and the front filter device 7 are disassembled for cleaning and replacement.

[0045] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. An extraction and filtration device that is convenient for installing a magnetic rod, characterized in that: include: An extraction box (1), wherein an extraction chamber (17) for preventing extraction liquid from flowing is arranged in the extraction box (1), and a diaphragm (16) is guided to pass through the extraction liquid via a guide roller (18) in the extraction chamber (17); A rear magnetic attraction device (2), wherein the extraction box (1) is provided with a rear magnetic attraction device (2) at a position intersecting with the guide roller (18), and the rear magnetic attraction device (2) comprises a magnetic attraction column (205) inserted into the extraction chamber (17) for absorbing magnetic substances in the extraction liquid; A docking box (8) is installed at the front end of the extraction box (1) and is used to inject an extracting liquid into the extraction box (1). A pre-filter device (7) for filtering the extracting liquid is arranged in the docking box (8), and a magnetic rod device (3) for adsorbing magnetic substances in the extracting liquid is inserted in the pre-filter device (7).

2. The extraction and filtration device for facilitating installation of a magnetic rod according to claim 1, characterized in that: A drainage pump (14) for extracting the extraction liquid in the extraction chamber (17) is installed at the rear end of the extraction box (1), and an auxiliary motor (15) for driving the guide roller (18) to rotate is fixedly installed on the extraction box (1).

3. The extraction and filtration device for facilitating installation of a magnetic rod according to claim 1, characterized in that: The rear magnetic device (2) comprises a plug-in column (204) for fixing a magnetic column (205) and sealingly mounted with the extraction box (1); the surface of the magnetic column (205) is blade-shaped or wavy, and the end of the magnetic column (205) is provided with a sealing rubber ring (206) for clamping into the extraction box (1) for sealing and preventing the magnetic column (205) from falling off; the end of the plug-in column (204) is integrally formed with a first handle (201) for conveniently pulling out the plug-in column (204).

4. The extraction and filtration device for facilitating installation of a magnetic rod according to claim 3, characterized in that: The extraction box (1) is provided with a quick locking device (4) for fixing the rear magnetic attraction device (2), and the quick locking device (4) comprises a connection seat (401) fixedly mounted on the extraction box (1), and a main sleeve (402) for inserting the plug-in column (204) is integrally formed on the connection seat (401), and a docking plate (405) is integrally formed at the end of the main sleeve (402), and an end cover (202) for fitting the docking plate (405) is provided at the end of the plug-in column (204), and the docking plate (405) is integrally formed at the end of the plug-in column (204). 05), a C-shaped clamp (406) is hingedly installed on the C-shaped clamp (406), the C-shaped clamp (406) is connected to the docking plate (405) through a first torsion spring (410), and the upper end of the C-shaped clamp (406) is used to press the end cover (202) onto the docking plate (405), and a rotating extrusion ring (404) is threadedly installed on the main sleeve (402), and the bottom of the rotating extrusion ring (404) is used to change the rotational position of the C-shaped clamp (406) relative to the docking plate (405) by squeezing the lower end of the C-shaped clamp (406).

5. The extraction and filtration device for facilitating installation of a magnetic rod according to claim 4, characterized in that: A locking motor (407) is fixedly mounted on the connecting seat (401), and the output end of the locking motor (407) drives a driving wheel (408), and a driven gear ring (409) meshing with the driving wheel (408) is fixedly mounted on the rotating extrusion ring (404).

6. The extraction and filtration device for facilitating installation of a magnetic rod according to claim 4, characterized in that: The end cover (202) is provided with a limiting groove (203), and a positioning protrusion (403) which is plugged into the limiting groove (203) and is used to prevent the end cover (202) from rotating is fixedly mounted on the docking plate (405).

7. The extraction and filtration device for facilitating installation of a magnetic rod according to claim 1, characterized in that: The docking box (8) comprises a main box body (802) fixedly mounted on the front end of the extraction box (1) by means of bolts, and a liquid inlet pipe (804) for connecting to an external extraction liquid supply device is provided at the front end of the main box body (802), and the interior of the main box body (802) is connected to the extraction chamber (17) via a liquid discharge port (801).

8. The extraction and filtration device for facilitating installation of a magnetic rod according to claim 7, characterized in that: The pre-filter device (7) comprises a bottom plate (707) fixedly mounted on the main housing (802), and a double-layer sleeve (702) consisting of two inner and outer sleeves inserted into the interior of the main housing (802) is mounted on the bottom plate (707) via a support column, and a top filter membrane (701) and a bottom filter membrane (704) are mounted at the upper and lower ends of the double-layer sleeve (702), respectively, the outer side of the top filter membrane (701) is connected to the liquid discharge port (801), and a waste liquid cavity (706) for collecting filtered waste is arranged between the outer side of the bottom filter membrane (704) and the bottom plate (707), and the liquid inlet pipe (804) is connected to the liquid guide cavity (803) through the liquid guide cavity (803). ) is connected to the waste liquid chamber (706), and a waste valve (12) for discharging waste materials in the waste liquid chamber (706) is installed on the bottom plate (707). A spiral flow channel (9) for connecting the top filter membrane (701) and the bottom filter membrane (704) is formed between the inner and outer sleeves of the double-layer sleeve (702) through a spiral sheet (10). The magnetic rod device (3) includes a connecting plate (302) installed on the top of the double-layer sleeve (702) through a fixing device (6), and an inserted magnetic rod (303) is fixedly installed at the bottom of the connecting plate (302) and inserted into the spiral flow channel (9) for adsorbing magnetic substances in the extract.

9. The extraction and filtration device for facilitating installation of a magnetic rod according to claim 8, characterized in that: A stirring motor (703) is installed at the center of the double-layer sleeve (702), and the output end of the stirring motor (703) is provided with a stirring paddle (705) for stirring the solution in the waste liquid chamber (706), a centering column (19) for positioning the bottom plate (707) is provided on the main box body (802), and a second handle (5) is fixedly installed on the bottom plate (707), an annular matching groove (11) is provided on the bottom plate (707), and an annular matching protrusion (13) which is plugged into the annular matching groove (11) and acts as a seal is provided at the bottom of the main box body (802).

10. The extraction and filtration device for facilitating installation of a magnetic rod according to claim 8, characterized in that: The fixing device (6) comprises a central column (605) fixedly mounted at the center of the double-layer sleeve (702), and a rotating seat (603) is rotatably mounted on the top of the central column (605), and the rotating seat (603) and the central column (605) are connected via a second torsion spring (604), and a rotating handle (601) is provided on the rotating seat (603) for facilitating the rotation of the rotating seat (603), and a C-shaped clamping plate (602) is provided on the rotating seat (603) for clamping the connecting plate (302) on the top of the double-layer sleeve (702), and a guide hole (301) is provided on the connecting plate (302) for facilitating the end of the C-shaped clamping plate (602) to pass through.

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