Automatic dip-coating device for preparing reverse osmosis membrane

Abstract

The invention relates to the technical field of coating devices, and discloses an automatic dip-coating device for preparing a reverse osmosis membrane, the automatic dip-coating device comprises a mounting rack, a dip-coating box is arranged at the front end of the top of the mounting rack, a membrane winding mechanism is arranged at the rear end of the top of the mounting rack, the interior of the dip-coating box is obliquely arranged from back to front, and an electric heating pipe is arranged at the bottom of the inner side of the dip-coating box; guide mechanisms are arranged at the front end and the rear end of the top of the dip-coating box, a reverse osmosis membrane is wound on the two guide mechanisms, each guide mechanism comprises a guide compression roller, and limiting chamfers are formed in the two ends of each guide compression roller. According to the automatic dip-coating device for preparing the reverse osmosis membrane, power is provided through the membrane winding mechanism to drive the reverse osmosis membrane to move in the dip-coating box, the moving direction of the reverse osmosis membrane in the dip-coating box is limited through the two sets of guide mechanisms, the bottom of the reverse osmosis membrane makes contact with coating liquid in the dip-coating box, and continuous dip-coating of the single face of the reverse osmosis membrane can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of coating devices, in particular to an automatic dipping coating device for preparing reverse osmosis membranes. Background Art

[0002] A fuel cell is a power generation device that converts the chemical energy present in fuel and oxidant directly into electrical energy. In the production process of new energy batteries such as lithium fuel cells, high-purity water and solvents are required. Reverse osmosis membrane technology can be used for water purification and solvent recovery in the battery production process to improve the performance and quality of the battery. For example, in the production process of fuel cells, reverse osmosis membranes can remove impurities and metal ions in water to prevent them from affecting the performance of the battery.

[0003] The preparation methods of reverse osmosis membranes include interfacial polymerization, coating, plasma polymerization, etc. Among them, the coating method mainly involves coating the coating liquid onto the base membrane to form a thin film, and then curing it by heat treatment or other methods. The common dip coating process in the prior art is to immerse the base membrane in the coating liquid. This method can only achieve double-sided dip coating of the reverse osmosis membrane; currently, the single-sided coating process for the reverse osmosis membrane mainly includes the scraper type, the slit extrusion type, etc.

[0004] In blade coating, the reverse osmosis membrane passes through the coating roller and directly contacts the coating liquid. Excess coating liquid will be coated on the reverse osmosis membrane. When it passes between the coating roller and the blade, the blade scrapes off the excess coating liquid and refluxes it, thereby forming a uniform coating on the surface of the reverse osmosis membrane. However, this coating method is limited by the viscosity of the coating liquid and is only suitable for high-viscosity coating liquids. When coating low-viscosity coating liquids, the coating liquid is prone to leak along the contact position between the reverse osmosis membrane and the coating roller; in slit extrusion coating, the coating liquid is squeezed and sprayed along the gap of the coating mold at a certain pressure and flow rate and transferred to the reverse osmosis membrane. Affected by the fluid properties of the coating liquid, the coating edge may have a "thick edge" phenomenon, and the pressure at various locations in the gap of the coating mold is prone to change in the initial stage, resulting in the formation of a half-moon-shaped feature at the starting point, end point and both side edges of the coating, affecting the performance of the reverse osmosis membrane. Summary of the invention

[0005] The object of the present invention is to provide an automatic dip coating device for preparing a reverse osmosis membrane to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic dipping device for preparing a reverse osmosis membrane, comprising a mounting frame, a dipping box is arranged at the front end of the top of the mounting frame, a membrane winding mechanism is arranged at the rear end of the top, the inside of the dipping box is inclined from back to front, and an electric heating tube is arranged at the bottom of the inner side of the dipping box, a guide mechanism is arranged at the front end and the rear end of the top of the dipping box, and a reverse osmosis membrane is wound on two sets of guide mechanisms, the guide mechanism comprises a guide roller, and both ends of the guide roller are provided with a limited chamfer; The left and right sides of the dipping box are both provided with a warping mechanism for warping the two sides of the reverse osmosis membrane, and the warping mechanism includes a warping row and a plurality of short limit rollers arranged on the warping row; A pressing plate mechanism is arranged on the top of the two groups of the warping mechanisms. The pressing plate mechanism is pressed on the top of the reverse osmosis membrane. The pressing plate mechanism comprises a positioning pressing plate and a plurality of side positioning short rollers and a bottom positioning long roller arranged on the positioning pressing plate.

[0007] Preferably, a coating thickness adjustment mechanism is provided at one end of the top of the dipping box close to the membrane winding mechanism, and the coating thickness adjustment mechanism includes a support arm fixedly installed on the top of the dipping box, and a horizontal rubber roller, a horizontal adjustment roller and an adjustment component for adjusting the horizontal adjustment roller are provided inside the support arm. The position of the horizontal adjustment roller is adjusted by rotating the adjustment component, so that the gap between the horizontal adjustment roller and the horizontal rubber roller can be adjusted, thereby limiting the coating thickness of the reverse osmosis membrane.

[0008] Preferably, the guide mechanism also includes two groups of bearing seats and mounting seats, the two groups of bearing seats are movably mounted on the two ends of the guide pressure roller, and the bearing seats are fixedly mounted on the mounting seats, and the mounting seats are fixedly mounted on the inner wall of the dipping box. The bearing seats are restricted by the mounting seats to ensure that the guide pressure roller is stably installed inside the dipping box.

[0009] Preferably, connecting brackets are fixedly installed on the inner walls on both sides of the dipping box, and the warping mechanism is horizontally fixedly installed on the connecting brackets. By setting the connecting brackets to provide an installation position for the warping mechanism, the stability of the warping mechanism during operation is ensured, thereby achieving stable restriction of the reverse osmosis membrane.

[0010] Preferably, a slope is provided on one side of the edge-warping row close to the pressure plate mechanism, and the inclination angle of the slope is 30-45°, a mounting groove is provided on the slope, the limiting short roller is obliquely arranged in the mounting groove, and the inclination angle of the limiting short roller is the same as the inclination angle of the slope, and a plurality of step mounting holes are provided on the top of the edge-warping row which pass through to the bottom thereof, and the edge-warping mechanism can be fixedly installed on the connecting bracket as a whole by cooperating with the screws and the step mounting holes, thereby ensuring the stability of the edge-warping mechanism when working.

[0011] Preferably, both ends of the limiting short roller are movably mounted with snap-fitting fingers, and both long sides of the mounting groove are provided with snap-fitting grooves that cooperate with the snap-fitting fingers. The snap-fitting fingers at both ends of the limiting short roller are snapped into the snap-fitting grooves, so that the limiting short roller can be movably installed in the mounting groove, thereby ensuring stable operation of the limiting short roller.

[0012] Preferably, the size of the front end of the positioning pressure plate is adapted to the spacing between the two sets of guide mechanisms, and two sets of handles are provided on the top of the positioning pressure plate. The pressure plate mechanism is clamped on the top of the two sets of warping mechanisms to facilitate disassembly and assembly of the pressure plate mechanism through the handles.

[0013] Preferably, the bottom positioning long roller is horizontally movably installed at the bottom of the positioning pressure plate, the side positioning short rollers are movably installed at both sides of the positioning pressure plate, and the side positioning short rollers are inclined, and the inclination angle of the side positioning short rollers is the same as the inclination angle of the limiting short rollers. The warping positions on both sides of the reverse osmosis membrane can be limited by limiting the several side positioning short rollers on both sides of the positioning pressure plate and the several limiting short rollers on the warping edge row.

[0014] Preferably, a plurality of plug-in arms are provided on both sides of the positioning pressure plate, and the plug-in arms can be snapped into the inside of the step mounting hole. By snapping the plug-in arms on both sides of the positioning pressure plate into the step mounting holes at corresponding positions, stable installation of the entire pressure plate mechanism can be achieved.

[0015] Preferably, a liquid level sensor is provided on the side of the dipping box away from the film winding mechanism, a discharge port is provided on the end of the dipping box away from the film winding mechanism, and a feed port is provided on the end close to the film winding mechanism. The liquid level of the coating liquid is detected by the liquid level sensor, and the detection data is transmitted to the background control terminal. The background control terminal can control the feeding equipment to add the coating liquid according to the liquid level data.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The automatic dipping device for preparing reverse osmosis membrane provides power through the membrane winding mechanism to drive the reverse osmosis membrane to move in the dipping box, and limits the moving direction of the reverse osmosis membrane in the dipping box through two sets of guiding mechanisms, so that the bottom of the reverse osmosis membrane contacts the coating liquid in the dipping box, and can realize continuous dipping of one side of the reverse osmosis membrane. In addition, in this dipping method, the reverse osmosis membrane moves on the top of the coating liquid and directly contacts the coating liquid, which is not limited by the viscosity of the coating liquid, and there will be no uneven coating phenomenon, thereby ensuring the coating efficiency and quality.

[0017] 2. The automatic dipping device for preparing reverse osmosis membranes has limit chamfers on the guide rollers at both ends and is limited by the warping mechanisms on both sides. During the coating process, the reverse osmosis membrane can be warped on both sides along the position where it contacts the two sets of guide mechanisms to prevent the coating liquid from flowing into the top surface of the reverse osmosis membrane through both sides, thereby ensuring the quality of the reverse osmosis membrane coating.

[0018] 3. The automatic dipping device for preparing reverse osmosis membranes can limit the warping positions on both sides of the reverse osmosis membrane by arranging a pressing plate mechanism on the top of two groups of warping mechanisms, and limiting the warping positions on both sides of the reverse osmosis membrane by positioning a number of side positioning short rollers on both sides of the pressing plate and a number of limiting short rollers on the warping row, thereby ensuring the stability of the reverse osmosis membrane after the warping on both sides. At the same time, the coating position of the reverse osmosis membrane is limited by a number of bottom positioning long rollers at the bottom of the positioning pressing plate, so that the coating position of the reverse osmosis membrane can fully contact with the coating liquid when moving, thereby ensuring the coating effect. In addition, the reverse osmosis membrane is in rolling contact with the warping mechanism and the pressing plate mechanism, thereby preventing the reverse osmosis membrane from being damaged by friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure after the overall combination of the present invention; Figure 2 It is a structural schematic diagram of the interior of the dipping box and the coating thickness adjustment mechanism in the present invention; Figure 3 It is a structural schematic diagram of the installation position of the electric heating tube in the present invention; Figure 4 It is a structural schematic diagram of the guide mechanism in the present invention; Figure 5 It is a schematic diagram of the structure after the warping mechanism, the pressing plate mechanism and the reverse osmosis membrane are combined in the present invention; Figure 6 It is a structural schematic diagram of the warping mechanism in the present invention; Figure 7 It is a structural schematic diagram of the connection between the limiting short roller and the clamping finger in the present invention; Figure 8 It is a schematic diagram of the structure of the guide pressure roller and the reverse osmosis membrane in the present invention; Fig. 9 It is a structural schematic diagram of the pressure plate mechanism in the present invention; Fig.10 It is a structural schematic diagram of the plug-in arm in the plug-in position of the warped edge row in the present invention; Fig.11 It is a structural schematic diagram of the cross section of the dipping box in the present invention.

[0020] In the figure: 1. Mounting frame; 2. Film winding mechanism; 3. Dipping box; 4. Coating thickness adjustment mechanism; 41. Support arm; 42. Horizontal rubber roller; 43. Horizontal adjustment roller; 44. Adjustment component; 5. Electric heating tube; 6. Guide mechanism; 61. Guide pressure roller; 62. Bearing seat; 63. Mounting seat; 64. Limit chamfer; 7. Connecting bracket; 8. Edge warping mechanism; 81. Edge warping row; 82. Limit short roller; 83. Mounting groove; 84. Clamping finger; 85. Step mounting hole; 9. Press plate mechanism; 91. Positioning press plate; 92. Side positioning short roller; 93. Bottom positioning long roller; 94. Plug-in arm; 10. Reverse osmosis membrane; 11. Feed inlet; 12. Discharge outlet; 13. Liquid level sensor. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figures 1 to 11 In an embodiment of the present invention, an automatic dipping device for preparing a reverse osmosis membrane comprises a mounting frame 1, a dipping box 3 is arranged at the front end of the top of the mounting frame 1, and a membrane winding mechanism 2 is arranged at the rear end of the top. The membrane winding mechanism 2 is a prior art. When coating the reverse osmosis membrane 10, the membrane winding mechanism 2 can provide power to the reverse osmosis membrane 10, driving the reverse osmosis membrane 10 to move continuously in the dipping box 3. The inside of the dipping box 3 is inclined from back to front, and an electric heating pipe 5 is arranged at the bottom of the inner side of the dipping box 3. Guide mechanisms 6 are arranged at the front and rear ends of the top of the dipping box 3, and the reverse osmosis membrane 10 is wound around the two sets of guide mechanisms 6. The reverse osmosis membrane 10 is driven by the membrane winding mechanism 2 to provide power. 0 moves in the dipping box 3, and the moving direction of the reverse osmosis membrane 10 in the dipping box 3 is limited by two sets of guide mechanisms 6, so that the bottom of the reverse osmosis membrane 10 contacts the coating liquid in the dipping box 3, and continuous dipping of one side of the reverse osmosis membrane 10 can be achieved. The guide mechanism 6 includes a guide roller 61, and both ends of the guide roller 61 are provided with limited chamfers 64. The guide rollers 61 at both ends are provided with limited chamfers 64, and are limited by the warping mechanisms 8 on both sides. During the coating process, the reverse osmosis membrane 10 can be warped along the positions in contact with the two sets of guide mechanisms 6 to prevent the coating liquid from flowing into the top surface of the reverse osmosis membrane 10 through both sides, thereby ensuring the quality of the coating of the reverse osmosis membrane 10; The left and right sides of the inside of the dipping box 3 are both provided with a warping mechanism 8, which is used to make the two sides of the reverse osmosis membrane 10 warp up. The warping mechanism 8 includes a warping row 81 and a plurality of limiting short rollers 82 arranged on the warping row 81. The warping positions of the two sides of the reverse osmosis membrane 10 can be limited by limiting the plurality of side positioning short rollers 92 on both sides of the positioning plate 91 and the plurality of limiting short rollers 82 on the warping row 81, thereby ensuring the stability of the reverse osmosis membrane 10 after the two sides are warped up. A pressure plate mechanism 9 is provided on the top of the two sets of warping mechanisms 8. The pressure plate mechanism 9 is pressed on the top of the reverse osmosis membrane 10. The pressure plate mechanism 9 includes a positioning pressure plate 91 and a plurality of side positioning short rollers 92 and a bottom positioning long roller 93 provided on the positioning pressure plate 91. The coating position of the reverse osmosis membrane 10 is limited by the plurality of bottom positioning long rollers 93 at the bottom of the positioning pressure plate 91, so that the coating position of the reverse osmosis membrane 10 can fully contact with the coating liquid when moving, thereby ensuring the coating effect.

[0023] As a further implementation scheme of the above invention: a coating thickness adjustment mechanism 4 is provided at one end of the top of the dipping box 3 close to the membrane winding mechanism 2. The coating thickness adjustment mechanism 4 is a prior art. When coating the reverse osmosis membrane 10, the reverse osmosis membrane 10 is inserted into the coating thickness adjustment mechanism 4, and the coating thickness of the reverse osmosis membrane 10 can be adjusted by the coating thickness adjustment mechanism 4. The coating thickness adjustment mechanism 4 includes a support arm 41 fixedly installed on the top of the dipping box 3. The interior of the support arm 41 is provided with a horizontal rubber roller 42, a horizontal adjustment roller 43 and an adjustment component 44 for adjusting the horizontal adjustment roller 43. The adjustment component 44 is rotated to adjust the position of the horizontal adjustment roller 43, so as to adjust the gap between the horizontal adjustment roller 43 and the horizontal rubber roller 42, thereby limiting the coating thickness of the reverse osmosis membrane 10 and allowing excess coating liquid to flow back into the dipping box 3.

[0024] As a further implementation scheme of the above invention: the guide mechanism 6 also includes two sets of bearing seats 62 and a mounting seat 63. The two sets of bearing seats 62 are movably mounted on the two ends of the guide roller 61, and the bearing seats 62 are fixedly mounted on the mounting seat 63. The bearing seats 62 are used to limit the stability of the guide roller 61 during overall rotation, thereby achieving stable guidance of the reverse osmosis membrane 10. The mounting seat 63 is fixedly mounted on the inner wall of the dipping box 3. The bearing seats 62 are used to limit the bearing seats 62, thereby ensuring that the guide roller 61 is stably installed inside the dipping box 3.

[0025] As a further implementation scheme of the above invention: connecting brackets 7 are fixedly installed on the inner walls on both sides of the dipping box 3, and the warping mechanism 8 is horizontally fixedly installed on the connecting brackets 7. By setting the connecting brackets 7 to provide an installation position for the warping mechanism 8, the stability of the warping mechanism 8 during operation is ensured, thereby achieving stable restriction of the reverse osmosis membrane 10.

[0026] As a further implementation scheme of the above invention: a slope is provided on one side of the warping row 81 close to the pressure plate mechanism 9, and the inclination angle of the slope is 30-45°, and a mounting groove 83 is provided on the slope, and the mounting groove 83 provides an installation space for the limiting short roller 82, and the limiting short roller 82 is embedded in the mounting groove 83, which can reduce the overall volume of the warping mechanism 8, and the limiting short roller 82 is obliquely arranged in the mounting groove 83, and the inclination angle of the limiting short roller 82 is the same as the inclination angle of the slope, and the limiting short roller 82 is obliquely installed, so that the two sides of the reverse osmosis membrane 10 can be tilted, and the tilting angles of the two sides of the reverse osmosis membrane 10 are determined by the inclination angle of the limiting short roller 82, and a plurality of step mounting holes 85 are provided on the top of the warping row 81, which pass through to the bottom thereof, and the warping mechanism 8 can be fixedly installed on the connecting bracket 7 as a whole by screws cooperating with the step mounting holes 85, thereby ensuring the stability of the warping mechanism 8 when working.

[0027] As a further implementation scheme of the above invention: both ends of the limiting short roller 82 are movably mounted with snap-fitting fingers 84, and both long sides of the mounting groove 83 are provided with snap-fitting grooves that cooperate with the snap-fitting fingers 84. By snapping the snap-fitting fingers 84 at both ends of the limiting short roller 82 into the snap-fitting grooves, the limiting short roller 82 can be movably installed in the mounting groove 83, thereby ensuring that the limiting short roller 82 works stably and is easy to disassemble and assemble.

[0028] As a further implementation scheme of the above invention: the size of the front end of the positioning pressure plate 91 is adapted to the spacing between the two groups of guide mechanisms 6, ensuring a seamless transition between the positioning pressure plate 91 and the two groups of guide mechanisms 6, so that the reverse osmosis membrane 10 begins to curl up on both sides along the position in contact with the two groups of guide mechanisms 6, so as to prevent the coating liquid from flowing into the top surface of the reverse osmosis membrane 10 through both sides. Two groups of handles are provided on the top of the positioning pressure plate 91, and the pressure plate mechanism 9 is clamped on the top of the two groups of curling mechanisms 8, so as to facilitate the disassembly and assembly of the pressure plate mechanism 9 through the handles.

[0029] As a further implementation scheme of the above invention: a bottom positioning long roller 93 is horizontally movably installed at the bottom of the positioning pressure plate 91, and the coating position of the reverse osmosis membrane 10 is limited by a plurality of bottom positioning long rollers 93 at the bottom of the positioning pressure plate 91, so that the coating position of the reverse osmosis membrane 10 can fully contact with the coating liquid when moving, and side positioning short rollers 92 are movably installed on both sides of the positioning pressure plate 91, and the side positioning short rollers 92 are tilted, and the inclination angle of the side positioning short rollers 92 is the same as the inclination angle of the limiting short rollers 82. By limiting the plurality of side positioning short rollers 92 on both sides of the positioning pressure plate 91 and the plurality of limiting short rollers 82 on the warping row 81, the warping position on both sides of the reverse osmosis membrane 10 can be limited to ensure the stability of the reverse osmosis membrane 10 after the warping on both sides.

[0030] As a further implementation scheme of the above invention: a plurality of plug-in arms 94 are provided on both sides of the positioning pressure plate 91, and the plug-in arms 94 can be snapped into the inside of the step mounting hole 85. By snapping the plug-in arms 94 on both sides of the positioning pressure plate 91 into the step mounting holes 85 at the corresponding positions, the overall stable installation of the pressure plate mechanism 9 can be achieved, and disassembly and assembly are simple.

[0031] As a further implementation scheme of the above invention: a liquid level sensor 13 is arranged on the side of the dipping box 3 away from the film winding mechanism 2. The liquid level sensor 13 is a prior art and can detect the liquid level of the coating liquid in the dipping box 3. A discharge port 12 is arranged on the end of the dipping box 3 away from the film winding mechanism 2, and a feed port 11 is arranged on the end close to the film winding mechanism 2. The liquid level of the coating liquid is detected by the liquid level sensor 13, and the detection data is transmitted to the background control terminal. The background control terminal can control the feeding equipment to add the coating liquid according to the liquid level data.

[0032] During the specific implementation, the reverse osmosis membrane 10 to be coated is passed through the bottom of the guide roller 61 in the two sets of guide mechanisms 6, and then the reverse osmosis membrane 10 is passed between the horizontal rubber roller 42 and the horizontal adjustment roller 43 in the coating thickness adjustment mechanism 4. Finally, the reverse osmosis membrane 10 is wound in the membrane winding mechanism 2. According to the thickness of the reverse osmosis membrane 10 and the coating thickness, the adjustment component 44 is rotated to drive the horizontal adjustment roller 43 to move, and the gap between the horizontal adjustment roller 43 and the horizontal rubber roller 42 is adjusted. The pressure plate mechanism 9 is integrally pressed onto the two sets of warping mechanisms 8 through the plug-in arm 94 and the step mounting hole 85. The top; the discharge port 12 of the reverse osmosis membrane 10 is in a normally closed state during the coating stage, and the coating liquid is injected into the dipping tank 3 along the feed port 11 through the feeding device in the prior art. The liquid level of the coating liquid is based on the contact with the bottom of the reverse osmosis membrane 10. The coating liquid is heated by the electric heating tube 5 to maintain the coating liquid at a temperature suitable for coating. The liquid level of the coating liquid is detected by the liquid level sensor 13 and transmitted to the background control terminal. The background control terminal controls the feeding device to add the coating liquid according to the liquid level data; the membrane winding mechanism 2 provides power to drive the reverse osmosis membrane 10 to move in the dipping tank 3, The moving direction of the reverse osmosis membrane 10 in the dipping box 3 is restricted by two sets of guide mechanisms 6, so that the bottom of the reverse osmosis membrane 10 is immersed in the coating liquid inside the dipping box 3, and the reverse osmosis membrane 10 is continuously coated on one side; the tilting positions of the two sides of the reverse osmosis membrane 10 are restricted by a plurality of side positioning short rollers 92 on both sides of the positioning pressing plate 91 and a plurality of limiting short rollers 82 on the tilting edge row 81, so as to ensure the stability of the two sides of the reverse osmosis membrane 10 after tilting, and limiting chamfers 64 are provided at both ends of the guide rollers 61 in the two sets of guide mechanisms 6, so that the two edges of the reverse osmosis membrane 10 are aligned with the front guide rollers 61. It starts to warp at the position where it contacts the mechanism 6, and then returns to being flat along the position where it contacts the rear end guide mechanism 6 to prevent the coating liquid from flowing into the top surface of the reverse osmosis membrane 10 through both sides, thereby ensuring the quality of coating on the reverse osmosis membrane 10; the coating position of the reverse osmosis membrane 10 is limited by a plurality of bottom positioning long rollers 93 at the bottom of the positioning pressure plate 91 to prevent the coating position of the reverse osmosis membrane 10 from bulging, so that the coating position of the reverse osmosis membrane 10 can fully contact with the coating liquid when moving, thereby ensuring the coating effect; the reverse osmosis membrane 10 is in rolling contact with the warping mechanism 8 and the pressure plate mechanism 9, thereby preventing the reverse osmosis membrane 10 from being damaged by friction.

[0033] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. An automatic dipping device for preparing a reverse osmosis membrane, comprising a mounting frame (1), a dipping box (3) being arranged at the front end of the top of the mounting frame (1), a membrane winding mechanism (2) being arranged at the rear end of the top, the inside of the dipping box (3) being arranged to be inclined from the back to the front, and an electric heating tube (5) being arranged at the bottom of the inner side of the dipping box (3), characterized in that: The front end and the rear end of the top of the dipping box (3) are both provided with guide mechanisms (6), and a reverse osmosis membrane (10) is wound around the two sets of guide mechanisms (6), the guide mechanisms (6) include guide rollers (61), and both ends of the guide rollers (61) are provided with limiting chamfers (64); The left and right sides of the interior of the dipping box (3) are both provided with a warping mechanism (8) for warping the two sides of the reverse osmosis membrane (10), wherein the warping mechanism (8) comprises a warping row (81) and a plurality of short limiting rollers (82) arranged on the warping row (81); A pressure plate mechanism (9) is arranged on the top of the two groups of the warping mechanisms (8), and the pressure plate mechanism (9) is pressed onto the top of the reverse osmosis membrane (10). The pressure plate mechanism (9) comprises a positioning pressure plate (91) and a plurality of side positioning short rollers (92) and a bottom positioning long roller (93) arranged on the positioning pressure plate (91).

2. The automatic dip coating device for preparing a reverse osmosis membrane according to claim 1, characterized in that: A coating thickness adjustment mechanism (4) is provided at one end of the top of the dipping box (3) close to the film winding mechanism (2), and the coating thickness adjustment mechanism (4) comprises a support arm (41) fixedly mounted on the top of the dipping box (3), and a horizontal rubber roller (42), a horizontal adjustment roller (43), and an adjustment component (44) for adjusting the horizontal adjustment roller (43) are provided inside the support arm (41).

3. The automatic dip coating device for preparing a reverse osmosis membrane according to claim 1, characterized in that: The guide mechanism (6) further comprises two sets of bearing seats (62) and a mounting seat (63), wherein the two sets of bearing seats (62) are movably mounted on the two ends of the guide roller (61), and the bearing seats (62) are fixedly mounted on the mounting seat (63), and the mounting seat (63) is fixedly mounted on the inner wall of the dipping box (3).

4. The automatic dip coating device for preparing a reverse osmosis membrane according to claim 1, characterized in that: Connecting brackets (7) are fixedly mounted on the inner walls on both sides of the dipping box (3), and the edge warping mechanism (8) is horizontally fixedly mounted on the connecting brackets (7).

5. The automatic dip coating device for preparing a reverse osmosis membrane according to claim 1, characterized in that: A slope is provided on one side of the warping row (81) close to the pressure plate mechanism (9), and the slope has an inclination angle of 30-45 degrees. A mounting groove (83) is provided on the slope. The limiting short roller (82) is obliquely arranged in the mounting groove (83), and the inclination angle of the limiting short roller (82) is the same as the inclination angle of the slope. A plurality of step mounting holes (85) are provided on the top of the warping row (81) and extend to the bottom thereof.

6. The automatic dip coating device for preparing a reverse osmosis membrane according to claim 5, characterized in that: Both ends of the limiting short roller (82) are movably sleeved with a snap-fit ​​finger (84), and both long sides of the installation groove (83) are provided with a snap-fit ​​groove that cooperates with the snap-fit ​​finger (84).

7. The automatic dip coating device for preparing a reverse osmosis membrane according to claim 6, characterized in that: The size of the front end of the positioning pressure plate (91) is adapted to the spacing between the two sets of guide mechanisms (6), and two sets of handles are provided on the top of the positioning pressure plate (91).

8. The automatic dip coating device for preparing a reverse osmosis membrane according to claim 7, characterized in that: The bottom positioning long roller (93) is horizontally movably mounted on the bottom of the positioning pressure plate (91), and the side positioning short rollers (92) are movably mounted on both sides of the positioning pressure plate (91), and the side positioning short rollers (92) are inclined, and the inclination angle of the side positioning short rollers (92) is the same as the inclination angle of the limiting short rollers (82).

9. The automatic dip coating device for preparing a reverse osmosis membrane according to claim 8, characterized in that: A plurality of plug-in arms (94) are provided on both sides of the positioning pressure plate (91), and the plug-in arms (94) can be snap-fitted into the interior of the step mounting hole (85).

10. The automatic dip coating device for preparing a reverse osmosis membrane according to claim 1, characterized in that: A liquid level sensor (13) is provided on a side of the dipping box (3) away from the film winding mechanism (2), a discharge port (12) is provided on one end of the dipping box (3) away from the film winding mechanism (2), and a feed port (11) is provided on the end close to the film winding mechanism (2).

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