A nanofiltration membrane assembly for lithium extraction from salt lakes and a preparation device thereof

Abstract

The present invention discloses a nanofiltration membrane assembly for lithium extraction from salt lakes and a preparation device thereof, comprising a filter membrane main body and a coiled tube, and also comprising a detection assembly, which is used for detecting the use status of the filter membrane main body; a water outlet end cover and a water inlet end cover are respectively provided at both ends of the coiled tube, a guide tube is fixedly provided on the water inlet end cover, the detection assembly comprises a detection tube slidably sealed and arranged on the guide tube, an observation column is provided on the detection tube, and a detection assembly and a buffer assembly are provided on the water inlet end cover; when the filtering capacity of the filter membrane main body decreases, the pressure inside the coiled tube increases, pushing the buffer assembly to drive the observation column to slide, and the filtering capacity of the filter membrane main body can be fed back to the outside through the observation column, thereby facilitating the external judgment of the use degree of the filter membrane main body, so that the filter membrane main body can be accurately replaced after a certain degree of use, avoiding excessive or incomplete use of the filter membrane main body, resulting in reduced use effect of the filter membrane main body.

Description

Technical Field

[0001] The present invention relates to the technical field of nanofiltration membranes, in particular to a nanofiltration membrane assembly for extracting lithium from a salt lake and a preparation device thereof. Background Art

[0002] Against the backdrop of new energy development, the application and development of lithium resources has become particularly important. As an energy metal, lithium has become a valuable resource in my country. With the continuous expansion of the new energy industry, the demand for lithium is also increasing, making the exploitation of lithium resources particularly important. Currently, my country primarily uses salt lake brine to extract lithium. With the continuous development of technology, membrane technology has been widely used in the field of lithium extraction from salt lake brine. Nanofiltration technology, as a key component of membrane technology, has undergone rapid development and has been widely used in fields such as seawater desalination and wastewater treatment. Now, it is also beginning to be used in the process of extracting lithium from salt lake brine.

[0003] The main working principle of nanofiltration membrane is the membrane separation process driven by pressure difference. Applying a certain pressure difference on both sides of the membrane can allow a part of the solvent and components smaller than the membrane pore size to pass through the membrane, while particles, macromolecules, salts, etc. larger than the membrane pore size are intercepted by the membrane to achieve the purpose of separation. Compared with traditional precipitation methods, nanofiltration membrane lithium extraction has a simple process flow, small footprint, short production cycle, no three waste emissions, green and environmentally friendly, and no high-pressure, flammable, explosive and other dangerous processes. Therefore, the use of nanofiltration membranes can not only be used for lithium extraction from salt lakes, but also has many application scenarios in other industries.

[0004] The shortcomings of the existing technology are: when using nanofiltration membranes to extract lithium from salt lakes, due to the large amount of high-valent metal ions in the brine of the salt lake, the filter membrane needs to be replaced and cleaned after being contaminated. Moreover, when replacing and cleaning, it is difficult to judge the usage extent of the nanofiltration membrane, resulting in frequent replacement of the nanofiltration membrane affecting work efficiency, or excessive use of the nanofiltration membrane, affecting the lithium extraction efficiency. Summary of the Invention

[0005] The purpose of the present invention is to provide a nanofiltration membrane assembly for lithium extraction from salt lakes and a preparation device thereof, so as to solve the above-mentioned deficiencies in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A nanofiltration membrane assembly for lithium extraction from salt lakes, comprising a filter membrane body and a coiled tube, and also comprising a detection assembly for detecting the use status of the filter membrane body;

[0008] The two ends of the coiled tube are respectively provided with a water outlet end cover and a water inlet end cover, the water inlet end cover is fixedly provided with a guide tube, the detection assembly includes a detection tube which is slidingly sealed and arranged on the guide tube, and the detection tube is provided with an observation column;

[0009] It also includes a buffer component, which is used to buffer the water flow entering the water inlet end cover and drive the detection tube and the observation column to slide when the filtering performance of the filter membrane body decreases.

[0010] As a further preferred solution in the embodiment of the present invention, the buffer assembly includes a buffer plate, a sliding rod is fixedly provided on the buffer plate, the sliding rod is slidingly and sealingly connected to the guide tube, and the sliding rod is slidingly connected to the detection tube.

[0011] A device for preparing a nanofiltration membrane assembly for lithium extraction from salt lakes, which is used to prepare the above-mentioned nanofiltration membrane assembly for lithium extraction from salt lakes, comprises a base and a clamping assembly for clamping a coiled tube;

[0012] A material taking component, which is used to take down the coiled pipe;

[0013] The linkage assembly is used to enable the clamping assembly to clamp the coiled tube and drive the coiled tube to rotate. After the filter membrane body is rolled up, the linkage assembly enables the retrieving assembly to remove the coiled tube;

[0014] The clamping assembly includes a rotating disk, which is provided with a plurality of arc-shaped holes, and active clamps are slidably provided on the plurality of arc-shaped holes. An active rotating seat is rotatably provided on the base, and a plurality of sliding grooves are provided on the active rotating seat. The plurality of sliding grooves correspond one-to-one to the plurality of active clamps, and the active clamps are slidably provided in the sliding grooves.

[0015] As a further preferred solution in the embodiment of the present invention, a plurality of fixing frames are slidably provided on the active rotating seat, a friction plate is fixedly provided on each of the fixing frames, and the friction plates correspond to and abut against the active clamping claws one by one.

[0016] As a further preferred solution in the embodiment of the present invention, a plurality of second springs are provided between the fixing frame and the active rotating seat, and two ends of the second springs are fixedly connected to the fixing frame and the active rotating seat respectively.

[0017] As a further preferred solution in the embodiment of the present invention, the clamping assembly further comprises a driven rotating seat rotatably arranged on the base, a plurality of driven clamping jaws are slidably arranged on the driven rotating seat, and the plurality of driven clamping jaws correspond one-to-one to the plurality of active clamping jaws;

[0018] A first spring is provided between each of the plurality of driven clamping jaws and the driven rotating seat, and two ends of the first spring are fixedly connected to the driven clamping jaw and the driven rotating seat respectively.

[0019] As a further preferred solution in the embodiment of the present invention, the material taking assembly includes a lifting platform slidably arranged on the base, two support blocks are provided on the lifting platform, the two support blocks are respectively adapted to the active clamping jaw and the driven clamping jaw, two connecting rods are rotatably provided on the lifting platform, and a sliding seat is rotatably provided on both of the connecting rods, and the sliding seat is slidably connected to the base;

[0020] A plurality of third springs are provided between the lifting platform and the base, and two ends of the third springs are fixedly connected to the lifting platform and the base respectively.

[0021] As a further preferred solution in the embodiment of the present invention, a rotating rod is rotatably provided on the base, and two reciprocating grooves are provided on the rotating rod, and the two reciprocating grooves correspond to the two sliding seats one by one, and the sliding seats are arranged in the reciprocating grooves;

[0022] The reciprocating groove includes an arc-shaped groove and a straight groove, and two ends of the arc-shaped groove are connected with two ends of the straight groove.

[0023] As a further preferred solution in the embodiment of the present invention, the material picking assembly includes a first gear and a second gear rotatably arranged on the base, and the first gear and the second gear are engaged for transmission, a first pulley is fixedly arranged on the second gear, a second pulley is fixedly arranged on the rotating rod, and a belt is arranged for transmission between the first pulley and the second pulley.

[0024] As a further preferred solution in the embodiment of the present invention, a driving motor is fixedly provided on the base, and a motor shaft of the driving motor is fixedly connected to the rotating disk;

[0025] A fixing ring is fixedly provided on the motor shaft of the driving motor, a plurality of pawls are rotatably provided on the fixing ring, a torsion spring is provided between the plurality of pawls and the fixing ring, a ratchet ring is fixedly provided on the first gear, and the plurality of pawls are engaged with the ratchet ring.

[0026] In the above technical solution, the nanofiltration membrane assembly for lithium extraction from salt lakes and the preparation device thereof provided by the present invention have the following beneficial effects:

[0027] 1. In this embodiment, a detection component and a buffer component are provided on the water inlet end cover, so that the filtering capacity of the filter membrane body decreases after long-term use. At this time, the pressure inside the coil increases, pushing the buffer component, so that the buffer component drives the observation column to slide, and the filtering capacity of the filter membrane body can be fed back to the outside through the observation column, so that the outside can judge the usage degree of the filter membrane body, and the filter membrane body can be accurately replaced after a certain degree of use, thereby avoiding excessive or incomplete use of the filter membrane body, resulting in reduced use effect of the filter membrane body and affecting lithium extraction efficiency.

[0028] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0029] This application document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0031] Figure 1 A schematic diagram of the overall structure of the nanofiltration membrane provided in an embodiment of the present invention;

[0032] Figure 2 A cross-sectional view of a nanofiltration membrane provided by an embodiment of the present invention;

[0033] Figure 3 The embodiment of the present invention provides Figure 2 A magnified view of point A in the figure;

[0034] Figure 4 A schematic diagram of the structure of a detection component and a buffer component provided in an embodiment of the present invention;

[0035] Figure 5 A schematic diagram of the overall structure of a winding device provided in an embodiment of the present invention;

[0036] Figure 6 An overall cross-sectional view of a winding device provided in an embodiment of the present invention;

[0037] Figure 7 A schematic diagram of the structure of a rotating disk provided in an embodiment of the present invention;

[0038] Figure 8 A schematic diagram of the internal structure of the active transposition device provided in an embodiment of the present invention;

[0039] Figure 9 A cross-sectional view of an active transposition device according to an embodiment of the present invention;

[0040] Figure 10 A schematic diagram of the structure of a fixing frame provided in an embodiment of the present invention;

[0041] Figure 11 A schematic diagram of a driven rotary seat structure provided in an embodiment of the present invention;

[0042] Figure 12 A schematic diagram of the first gear structure provided in an embodiment of the present invention;

[0043] Figure 13 A schematic diagram of the linkage component structure provided by an embodiment of the present invention;

[0044] Figure 14 A schematic structural diagram of a material retrieving assembly provided in an embodiment of the present invention.

[0045] Description of reference numerals:

[0046] 1. Filter membrane body; 11. Reel; 12. Water outlet end cover; 2. Water inlet end cover; 21. Guide tube; 22. Detection tube; 23. Observation column; 3. Buffer plate; 31. Slide rod; 4. Base; 41. Drive motor; 5. Rotating disk; 51. Active clamping jaw; 52. Arc hole; 53. Driven swivel seat; 54. Driven clamping jaw; 55. First spring; 6. Active swivel seat; 61. Sliding groove; 62. Fixed frame; 63. Friction plate; 64. Second spring; 7. First gear; 71. Ratchet ring; 72. Fixed ring; 73. Ratchet; 74. Second gear; 75. First pulley; 76. Second pulley; 77. Belt; 78. Rotating rod; 79. Reciprocating groove; 9. Lifting platform; 91. Support block; 92. Connecting rod; 93. Sliding seat; 94. Third spring. DETAILED DESCRIPTION

[0047] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0048] Please refer to 1-14, a nanofiltration membrane assembly for lithium extraction from salt lakes, including a filter membrane body 1 and a coiled tube 11, and also including a detection assembly, which is used to detect the use status of the filter membrane body 1; a water outlet end cap 12 and a water inlet end cap 2 are respectively provided at both ends of the coiled tube 11, and a guide tube 21 is fixedly provided on the water inlet end cap 2, and the detection assembly includes a detection tube 22 which is slidingly sealed and arranged on the guide tube 21, and an observation column 23 is provided on the detection tube 22; it also includes a buffer assembly, which is used to buffer the water flow entering the water inlet end cap 2, and when the filtration performance of the filter membrane body 1 decreases, it drives the detection tube 22 and the observation column 23 to slide. In this embodiment, by arranging the detection assembly and the buffer assembly on the water inlet end cap 2, After the filter membrane main body 1 has been used for a long time, its filtering capacity decreases. At this time, the pressure inside the coil 11 increases, pushing the buffer component, so that the buffer component drives the observation column 23 to slide, and the filtering capacity of the filter membrane main body 1 can be fed back to the outside through the observation column 23, which is convenient for the outside to judge the usage degree of the filter membrane main body 1, so that the filter membrane main body 1 can be accurately replaced after a certain degree of use, avoiding excessive or incomplete use of the filter membrane main body 1, resulting in reduced use effect of the filter membrane main body 1 and affecting lithium extraction efficiency; specifically, when the water outlet end cover 12 and the water inlet end cover 2 are installed, they are sealed after being threaded in the prior art. Its operation method and working principle are common knowledge known to people in this field and will not be elaborated on.

[0049] Specifically, the buffer assembly includes a buffer plate 3, on which a slide rod 31 is fixedly provided. The slide rod 31 is slidably and sealedly connected to the guide tube 21, and the slide rod 31 is slidably connected to the detection tube 22. In this embodiment, when the filtration performance of the filter membrane body 1 decreases, the pressure in the coil tube 11 increases, so that the buffer plate 3 is subjected to pressure, and the friction between the detection tube 22 and the guide tube 21 is overcome, and the slide rod 31 and the detection tube 22 are driven to slide. When the detection tube 22 slides, it drives the observation column 23 to slide, so that the observation column 23 is retracted into the guide tube 21. At this time, the length of the observation column 23 can be checked. Determine the degree of use of the filter membrane body 1 and replace and clean it. When removing the water inlet end cover 2, the buffer plate 3 can be taken out through the guide tube 21, the detection tube 22 and the slide rod 31. During the removal process, the buffer plate 3 will scrape off impurities on the inner wall of the coil tube 11, reducing the difficulty of cleaning the inner wall of the coil tube 11 and improving the efficiency of inspection and replacement of the filter membrane body 1. Specifically, the friction between the guide tube 21 and the detection tube 22 is greater than the friction between the slide rod 31 and the detection tube 22, so that only when the slide rod 31 slides to conflict with the detection tube 22 will it drive the detection tube 22 to slide.

[0050] A device for preparing a nanofiltration membrane assembly for lithium extraction from salt lakes, which is used to prepare the above-mentioned nanofiltration membrane assembly for lithium extraction from salt lakes, comprises a base 4 and a clamping assembly for clamping a coiled tube 11;

[0051] A material taking assembly, which is used to take down the coiled tube 11;

[0052] The linkage assembly is used to enable the clamping assembly to clamp the coiled tube 11 and drive the coiled tube 11 to rotate. After the filter membrane body 1 is rolled up, the linkage assembly is used to enable the retrieving assembly to remove the coiled tube 11;

[0053] The clamping assembly includes a rotating disk 5, which is provided with a plurality of arc-shaped holes 52, and active clamping claws 51 are slidably provided on the plurality of arc-shaped holes 52. An active rotating seat 6 is rotatably provided on the base 4, and a plurality of sliding grooves 61 are provided on the active rotating seat 6. The plurality of sliding grooves 61 correspond to the plurality of active clamping claws 51 one by one, and the active clamping claws 51 are slidably provided in the sliding grooves 61. The reel 11 is clamped by the clamping assembly provided on the base 4, and is driven to rotate, and the filter membrane body 1 is reeled onto the reel 11. The clamping assembly is then loosened by the linkage assembly, and the material taking assembly cooperates with the clamping assembly to remove and place the reel 11 on which the filter membrane body 1 is reeled, and the adhesive used in the reeling process can be solidified on the material taking assembly. , and at the same time does not affect the next winding work, thereby improving the efficiency of winding the filter membrane body 1 onto the winding tube 11; further, by arranging an arc-shaped hole 52 on the rotating disk 5, arranging a sliding groove 61 on the active rotating seat 6, and arranging the active clamping claw 51 in the arc-shaped hole 52 and the sliding groove 61, when the rotating disk 5 rotates, the arc-shaped hole 52 and the sliding groove 61 can cooperate with each other to make the active clamping claw 51 slide along the sliding groove 61 to realize the clamping of the winding tube 11 by the main feeding clamping claw, and after clamping, the active rotating seat 6 can be driven to rotate by the active clamping claw 51, so as to complete the clamping of the winding tube 11 and also drive it to rotate, making it more convenient to fix and rotate the winding tube 11 and improving efficiency.

[0054] Specifically, a plurality of fixing frames 62 are slidably provided on the active rotating seat 6, and a plurality of fixing frames 62 are fixedly provided with friction plates 63. The plurality of friction plates 63 correspond to and abut against the plurality of active clamping claws 51 one by one; a plurality of second springs 64 are provided between the fixing frames 62 and the active rotating seat 6, and the two ends of the second springs 64 are fixedly connected to the fixing frames 62 and the active rotating seat 6, respectively. In this embodiment, the friction between the friction plates 63 on the fixing frames 62 and the base 4 prevents the active rotating seat 6 from rotating. Therefore, when the rotating disk 5 rotates, the arc-shaped hole 52 and the sliding groove 61 on the active rotating seat 6 can be used to move the active clamping claw 51 to The center position of the active swivel seat 6 slides to achieve better clamping of the reel tube 11. When clamping the reel tube 11, the active clamping claw 51 abuts against the fixing frame 62, causing the fixing frame 62 to slide and compress the second spring 64. At this time, the friction plate 63 is disengaged from the base 4, and then the rotating disk 5 continues to rotate, and the active clamping claw 51 clamps and rotates the reel tube 11 while driving the active swivel seat 6 to rotate. That is, when the rotating disk 5 rotates, it can first clamp the reel tube 11 and then directly drive the reel tube 11 to rotate, making it more efficient in fixing the reel tube 11 and driving it to rotate.

[0055] Furthermore, the clamping assembly also includes a driven rotating seat 53 rotatably arranged on the base 4, and a plurality of driven clamping jaws 54 are slidably arranged on the driven rotating seat 53, and the plurality of driven clamping jaws 54 correspond one-to-one to the plurality of active clamping jaws 51; a first spring 55 is provided between the plurality of driven clamping jaws 54 and the driven rotating seat 53, and the two ends of the first spring 55 are fixedly connected to the driven clamping jaw 54 and the driven rotating seat 53 respectively. In this embodiment, by providing the driven clamping jaw 54, when installing the winding tube 11, the elastic force of the first spring 55 is used to pre-fix the driven clamping jaw 54 to one end of the winding tube 11, and at the same time, the other end is located between the two active clamping jaws 51. Then, the active clamping jaw 51 can automatically clamp the winding tube 11 by rotating the driving motor 41, thereby improving the portability of the installation of the winding tube 11.

[0056] In an embodiment further provided by the present invention, the material-taking assembly includes a lifting platform 9 slidably arranged on the base 4, and two support blocks 91 are provided on the lifting platform 9. The two support blocks 91 are respectively adapted to the active clamping jaw 51 and the driven clamping jaw 54. Two connecting rods 92 are rotatably provided on the lifting platform 9, and a sliding seat 93 is rotatably provided on the two connecting rods 92, which are slidably connected to the base 4; a plurality of third springs 94 are provided between the lifting platform 9 and the base 4, and the two ends of the third spring 94 are respectively fixedly connected to the lifting platform 9 and the base 4. In this embodiment, when the two sliding seats 93 slide toward each other, the lifting platform 9 is moved by the connecting rod 92. The platform 9 rises and stretches the third spring 94. When the active clamp 51 releases its grip on the roll tube 11, the support block 91 on one side can catch one side of the roll tube 11, and the driven clamp 54 slides through the support block 91 on the other side, compressing the first spring 55. The driven clamp 54 releases its grip on the roll tube 11, allowing the support block 91 to catch the other side of the roll tube 11. This ensures that the filter membrane body 1 can be removed more stably and safely after it is rolled up, avoiding the danger of manual removal. At the same time, it provides a location for the adhesive to solidify for the newly rolled filter membrane body 1, thereby improving the quality of the filter membrane body 1.

[0057] In the embodiment provided by the present invention, a rotating rod 78 is rotatably provided on the base 4, and two reciprocating grooves 79 are provided on the rotating rod 78. The two reciprocating grooves 79 correspond one-to-one to the two sliding seats 93, and the sliding seats 93 are arranged in the reciprocating grooves 79; the reciprocating grooves 79 include an arc groove and a straight groove, and the two ends of the arc groove are connected to the two ends of the straight groove. When the rotating rod 78 rotates, under the action of the arc groove, the two sliding seats 93 slide toward each other, and the lifting platform 9 is raised by the connecting rod 92. After the support block 91 supports both sides of the winding tube 11 and takes over the winding tube 11, the sliding seat 93 slides to the end point of the arc groove, enters the straight groove, and slides and resets along the straight groove under the action of the gravity of the lifting platform 9.

[0058] Specifically, the material-taking assembly includes a first gear 7 and a second gear 74 rotatably arranged on the base 4, and the first gear 7 is meshed with the second gear 74 for transmission. A first pulley 75 is fixedly arranged on the second gear 74, and a second pulley 76 is fixedly arranged on the rotating rod 78. A belt 77 is arranged for transmission between the first pulley 75 and the second pulley 76. In this embodiment, when the first gear 7 rotates, the first gear 7 is driven by the second gear 74, the first pulley 75, the belt 77, and the second pulley 76 to rotate the rotating rod 78, so that the material-taking assembly can remove the rolled tube 11 after winding.

[0059] In the solution further provided by the present invention, a driving motor 41 is fixedly provided on the base 4, and the motor shaft of the driving motor 41 is fixedly connected to the rotating disk 5; a fixing ring 72 is fixedly provided on the motor shaft of the driving motor 41, and a plurality of ratchet pawls 73 are rotatably provided on the fixing ring 72, and a torsion spring is provided between the plurality of ratchet pawls 73 and the fixing ring 72, and a ratchet ring 71 is fixedly provided on the first gear 7, and the plurality of ratchet pawls 73 are engaged with the ratchet ring 71. When the driving motor 41 starts to rotate the rotating disk 5 to drive the active clamping claw 51 to drive the winding tube 11 to rotate, the torsion spring between the ratchet pawl 73 and the fixing ring 72 acts, so that the fixing ring 72 drives the ratchet 73 to rotate , the pawl 73 will not drive the ratchet ring 71 to rotate, so that the first gear 7 will not rotate, so that when the active clamping jaw 51 drives the reel tube 11 to rotate, it will not affect the material taking assembly; when the driving motor 41 rotates in the opposite direction, it drives the fixing ring 72 to rotate, and causes the pawl 73 to drive the ratchet ring 71 and the first gear 7 to rotate, and the first gear 7 is driven by the second gear 74, the first pulley 75, the belt 77, and the second pulley 76 to rotate the rotating rod 78, so that the lifting platform 9 rises, and the reel tube 11 that has been reeled up of the filter membrane main body 1 is removed through the support block 91, so that the next reeling work can be carried out faster.

[0060] Working principle: When performing lithium extraction and filtration, brine enters the coiled tube 11 through the water inlet end cover 2. At this time, the brine enters the coiled tube 11, and the pressure of the brine drives the buffer plate 3, causing the buffer plate 3 to slide with the slide rod 31 until it slides to the end point of the slide rod 31 and contacts the end point of the detection tube 22. At this time, under the action of the buffer plate 3, the brine is filtered by the filter membrane body 1 through the holes on the coiled tube 11, and the filtered lithium ions flow out through the filter membrane body 1, and the unfiltered high-valent ions are discharged through the holes on the buffer plate 3 to the water outlet end cover 12. When the filtration performance of the filter membrane body 1 decreases, the pressure in the coiled tube 11 increases, causing the buffer plate 3 to be under pressure, and overcoming the friction between the detection tube 22 and the guide tube 21, while driving the slide rod 31 and the detection tube 22 to slide. When the detection tube 22 slides, it will drive the observation column 23 to slide, so that the observation column 23 guide When the filter element 1 is cleaned, the water inlet cover 2 and the water outlet cover 12 are removed. When the water inlet cover 2 is removed, the buffer plate 3 can be taken out through the guide tube 21, the detection tube 22 and the slide rod 31. During the removal process, the buffer plate 3 will scrape off the impurities on the inner wall of the roll tube 11, reducing the difficulty of cleaning the inner wall of the roll tube 11, and then the filter element 1 can be cleaned. When reinstalling after cleaning, the slide rod 31 is slid and retracted into the detection tube 22, and pressed against the detection tube 22 to make the detection tube 22 slide in the guide tube 21, so that the observation column 23 extends out of the guide tube 21 for subsequent use, and retracting the slide rod 31 into the detection tube 22 facilitates the subsequent installation of the water inlet cover 2 to the roll tube 11.

[0061] When the filter membrane body 1 is rolled up onto the winding tube 11, the elastic force of the first spring 55 is used to pre-fix the driven clamping claw 54 to one end of the winding tube 11, and at the same time, the other end is located between the two active clamping claws 51. Subsequently, adhesive is applied to the winding tube 11 and the filter membrane body 1, and one side of the filter membrane body 1 is adhered to the winding tube 11. The driving motor 41 is then started to drive the rotating disk 5 to rotate through the motor shaft. At this time, under the action of the second spring 64, the friction between the friction plate 63 on the fixing frame 62 and the base 4 prevents the active rotating seat 6 from rotating. Therefore, when the rotating disk 5 rotates, the arc-shaped hole 52 and the sliding groove 61 on the active rotating seat 6 can be used to make the active clamping claw 51 slide toward the center position of the active rotating seat 6 and adjust the other end of the winding tube 11. The end is clamped, and when the reel tube 11 is clamped, the active clamping claw 51 abuts against the fixing frame 62, causing the fixing frame 62 to slide and compress the second spring 64. At this time, the friction plate 63 is disengaged from the base 4, and then the rotating disk 5 continues to rotate, and the active clamping claw 51 drives the active rotating seat 6 to rotate while clamping and rotating the reel tube 11. When the reel tube 11 rotates, the filter membrane body 1 can be rolled up onto the reel tube 11. When the reel tube 11 rotates, due to the action of the torsion spring between the pawl 73 and the fixing ring 72, the fixing ring 72 drives the pawl 73 to rotate, and the pawl 73 will not drive the ratchet ring 71 to rotate. After the filter membrane body 1 is rolled up, the driving motor 41 rotates in the opposite direction, and the friction between the active rotating seat 6 and the base 4 is exerted. The active clamping claw 51 slides along the arc groove toward the outside of the rotating disk 5. At this time, the fixed frame 62 loses the limit of the active clamping claw 51. Under the reset action of the second spring 64, the friction plate 63 contacts the base 4 with friction. At this time, the active rotating seat 6 stops rotating, and then the rotating disk 5 rotates in the opposite direction, causing the active clamping claw 51 to slide and open on the arc groove and the sliding groove 61, loosening the clamping of the winding tube 11. At the same time, when the driving motor 41 rotates in the opposite direction, it drives the fixed ring 72 to rotate, and the pawl 73 drives the ratchet ring 71 and the first gear 7 to rotate. The first gear 7 is driven by the second gear 74, the first pulley 75, the belt 77, and the second pulley 76 to rotate the rotating rod 78. While the rotating rod 78 rotates, it rotates in the arc groove. Under the action of the groove, the two sliding seats 93 slide toward each other and lift the lifting platform 9 upward through the connecting rod 92, the third spring 94 stretches, and during the lifting process, the active clamping claw 51 releases one side of the reel tube 11. At the same time, the support block 91 on the other side pushes the driven clamping claw 54 to compress the first spring 55, and the driven clamping claw 54 slides and releases the clamping of the other side of the reel tube 11, and the two sides of the reel tube 11 can be supported by the support block 91, and the reel tube 11 is taken over. Then the sliding seat 93 slides to the end point of the arc groove, and the driving motor 41 stops. Under the action of the third spring 94 and gravity, the sliding seat 93 is reset along the straight groove on the reciprocating groove 79, so that the lifting platform 9 is lowered. During the lowering process, the third spring 94 is reset first, and then the lowering of the lifting platform 9 is buffered.At this point, the reel 11 can be installed and a new reeling operation can be performed. During the new reeling operation, the filter membrane body 1 that has just been reeled is placed on the support block 91 of the lifting platform 9 to solidify the adhesive used in the reeling operation.

[0062] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A device for preparing a nanofiltration membrane assembly for lithium extraction from salt lakes, which is used to prepare a nanofiltration membrane assembly, characterized in that: It comprises a base (4) and a clamping assembly for clamping the coiled tube (11); A material taking component, which is used to take off the coiled tube (11); A linkage assembly is used to enable the clamping assembly to clamp the reel tube (11) and drive the reel tube (11) to rotate. After the filter membrane body (1) is rolled up, the reel tube (11) is removed by the material removal assembly through the linkage assembly; The clamping assembly includes a rotating disk (5), a plurality of arc-shaped holes (52) are provided on the rotating disk (5), active clamping claws (51) are slidably provided on the plurality of arc-shaped holes (52), an active rotating seat (6) is rotatably provided on the base (4), a plurality of sliding grooves (61) are provided on the active rotating seat (6), the plurality of sliding grooves (61) correspond to the plurality of active clamping claws (51) one by one, and the active clamping claws (51) are slidably provided in the sliding grooves (61); A plurality of fixing frames (62) are slidably provided on the active rotating seat (6), and a friction plate (63) is fixedly provided on each of the fixing frames (62). The friction plates (63) correspond to and abut against the active clamping claws (51) one by one. A plurality of second springs (64) are provided between the fixing frame (62) and the active rotating seat (6), and two ends of the second springs (64) are fixedly connected to the fixing frame (62) and the active rotating seat (6), respectively; The clamping assembly further comprises a driven rotating seat (53) rotatably arranged on the base (4), a plurality of driven clamping claws (54) being slidably arranged on the driven rotating seat (53), and the plurality of driven clamping claws (54) corresponding one to one to the plurality of active clamping claws (51); A first spring (55) is provided between each of the plurality of driven clamping jaws (54) and the driven rotating seat (53), and two ends of the first spring (55) are fixedly connected to the driven clamping jaws (54) and the driven rotating seat (53), respectively.

2. A device for preparing a nanofiltration membrane assembly for lithium extraction from salt lakes according to claim 1, wherein the nanofiltration membrane assembly comprises a filter membrane body (1) and a coiled tube (11), characterized in that: It also includes a detection component for detecting the use status of the filter membrane body (1); The coiled tube (11) is provided with a water outlet end cover (12) and a water inlet end cover (2) at both ends, a guide tube (21) being fixedly provided on the water inlet end cover (2), the detection assembly comprising a detection tube (22) slidingly sealed and provided on the guide tube (21), and an observation column (23) being provided on the detection tube (22); It also includes a buffer assembly, which is used to buffer the water flow entering the water inlet end cover (2) and drive the detection tube (22) and the observation column (23) to slide when the filtering performance of the filter membrane body (1) decreases.

3. The device for preparing a nanofiltration membrane assembly for extracting lithium from a salt lake according to claim 2, characterized in that: The buffer assembly comprises a buffer plate (3), a sliding rod (31) is fixedly provided on the buffer plate (3), the sliding rod (31) is slidingly and sealingly connected to the guide tube (21), and the sliding rod (31) is slidingly connected to the detection tube (22).

4. The device for preparing a nanofiltration membrane assembly for extracting lithium from a salt lake according to claim 1, characterized in that: The material taking assembly includes a lifting platform (9) slidably arranged on a base (4), two support blocks (91) are arranged on the lifting platform (9), and the two support blocks (91) are respectively adapted to the active clamping claw (51) and the driven clamping claw (54), two connecting rods (92) are rotatably arranged on the lifting platform (9), and a sliding seat (93) is rotatably arranged on both the connecting rods (92), and the sliding seat is slidably connected to the base (4); A plurality of third springs (94) are provided between the lifting platform (9) and the base (4), and two ends of the third springs (94) are fixedly connected to the lifting platform (9) and the base (4), respectively.

5. The device for preparing a nanofiltration membrane assembly for extracting lithium from salt lakes according to claim 4, characterized in that: A rotating rod (78) is rotatably provided on the base (4), and two reciprocating grooves (79) are provided on the rotating rod (78). The two reciprocating grooves (79) correspond to the two sliding seats (93) one by one, and the sliding seats (93) are arranged in the reciprocating grooves (79); The reciprocating groove (79) includes an arcuate groove and a straight groove, and both ends of the arcuate groove are connected to both ends of the straight groove.

6. The device for preparing a nanofiltration membrane assembly for extracting lithium from salt lakes according to claim 5, characterized in that: The material taking assembly comprises a first gear (7) and a second gear (74) rotatably arranged on a base (4), wherein the first gear (7) and the second gear (74) are meshed and transmitted, a first pulley (75) is fixedly arranged on the second gear (74), a second pulley (76) is fixedly arranged on the rotating rod (78), and a belt (77) is provided for transmission between the first pulley (75) and the second pulley (76).

7. The device for preparing a nanofiltration membrane assembly for extracting lithium from salt lakes according to claim 6, characterized in that: A driving motor (41) is fixedly mounted on the base (4), and a motor shaft of the driving motor (41) is fixedly connected to the rotating disk (5); A fixing ring (72) is fixedly provided on the motor shaft of the driving motor (41), a plurality of ratchet pawls (73) are rotatably provided on the fixing ring (72), a torsion spring is provided between the plurality of ratchet pawls (73) and the fixing ring (72), a ratchet ring (71) is fixedly provided on the first gear (7), and the plurality of ratchet pawls (73) are engaged and connected with the ratchet ring (71).

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