An automatic pressure-maintaining roller slit coating equipment for reverse osmosis membrane preparation

Abstract

The present invention provides an automatic pressure-maintaining roller slit coating device for reverse osmosis membrane preparation, which relates to the field of coating technology, and includes a frame, a main roller is rotatably provided on the frame, two rotating frames are provided below the main roller, one end of the rotating frame is rotatably provided on the inner wall of the frame, the middle parts of the two rotating frames are rotatably connected with a pressure roller, a cylinder 1 is provided below the rotating frame, both sides of the two rotating frames are vertically provided with hinged tables, a connecting rod is hinged on the hinged table, a slider is hinged on the upper end of the connecting rod, a sliding seat is provided on the frame, a sliding rod is slidably provided in the sliding seat, the slider is slidably provided on the sliding rod, a block for contacting with the slider is provided on the sliding rod, the ends of the two sliding rods are commonly connected with a material receiving box, and a cleaning brush is provided above the material receiving box. After the telescopic shaft of the cylinder 1 is retracted to the limit position, the cleaning brush moves to the right below the main roller, the cleaning brush cleans the main roller, and the waste material dropped from the cleaning brush is stored in the material receiving box to avoid secondary pollution of the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of coating, and more specifically to an automatic pressure-maintaining double-roller slit coating device for preparing reverse osmosis membranes. Background Art

[0002] Reverse osmosis membrane is a semi-permeable membrane material used for separation and filtration. It is widely used in water treatment, seawater desalination, food and beverage processing, pharmaceuticals and other fields. In the preparation process of reverse osmosis membrane, coating is a key step. Through coating, the coating liquid containing specific polymer materials can be evenly coated on the membrane. After subsequent treatment such as curing, a dense layer with selective separation function can be formed.

[0003] The principle of roller slit coating is to use a pair of parallel and rotatable rollers, one of which has a slit coating head on its surface. The coating liquid is squeezed out from the slit under pressure and coated on the substrate passing between the two rollers. By controlling the speed, spacing of the rollers, and the pressure and flow rate of the coating liquid, the thickness and uniformity of the reverse osmosis membrane coating layer can be precisely controlled.

[0004] In order to attach the coating liquid to the reverse osmosis membrane, it is necessary to use a coating roller to apply pressure to the membrane. By adjusting the pressure and gap between the coating roller and the main roller, the thickness and coating amount of the coating material on the substrate surface can be accurately controlled to ensure that the coating thickness standard required by the product is met, avoiding material waste caused by excessively thick coating or affecting product performance due to excessively thin coating.

[0005] Under existing technical conditions, the coating roller will inevitably squeeze the coating liquid onto the main roller during operation, causing contamination of the main roller. In order to maintain the normal operation of the equipment and product quality, the main roller must be cleaned regularly. However, the traditional cleaning method has obvious disadvantages. It is necessary to stop the equipment or disassemble the main roller for cleaning, which not only causes production interruption and affects work efficiency, but also easily causes secondary contamination to other equipment during the cleaning process, further increasing equipment maintenance costs and production risks. Summary of the invention

[0006] In view of the shortcomings of the prior art, the object of the present invention is to provide an automatic pressure-maintaining double-roll slit coating device for preparing reverse osmosis membranes.

[0007] To solve the above technical problems, the present invention is implemented through the following technical solutions: an automatic pressure-maintaining roller slit coating device for reverse osmosis membrane preparation, comprising a frame, a main roller is rotatably provided on the frame, two rotating frames are provided below the main roller, one end of the two rotating frames is rotatably provided on the two inner side walls of the frame respectively, a pressure roller is rotatably connected to the middle part of the two rotating frames at the upper position, and the pressure roller is located below the main roller, a cylinder 1 is provided below the rotating frame, the bottom of the cylinder 1 is hinged to the frame, and the end of the telescopic shaft of the cylinder 1 is hinged to the rotating frame; the two rotating frames are respectively rotatably provided on the two inner side walls of the frame, and the pressure roller is located below the main roller. The sides of each rotating frame are vertically provided with a hinge platform, a connecting rod is hinged on the hinge platform, and a slider is hinged on the upper end of the connecting rod. Slide seats are provided on both sides of the frame and above the connecting rod. A sliding rod is provided in the sliding seat to slide in the horizontal direction. The slider is slidably arranged on the sliding rod. A spring is provided on the outer sleeve of the sliding rod, and two ends of the spring are respectively connected to the sliding seat and the sliding rod. A stopper for contacting with the sliding rod is provided in the middle portion of the sliding rod. The ends of the two sliding rods close to the main rollers are commonly connected with a material receiving box, and a cleaning brush for cleaning the main roller is provided above the material receiving box.

[0008] As a preferred technical solution of the present invention, a roller is rotatably provided on the end of the rotating frame away from its hinge point, and a gap adjustment device is provided above the roller. The gap adjustment device includes a pressure regulating seat, which is fixed on the side of the frame, and a pressure regulating wedge block for contacting the roller is slidably provided on the pressure regulating seat, and the contact surface of the pressure regulating wedge block with the roller is an inclined surface. A screw rod is rotatably provided on the pressure regulating seat along the axial direction of the pressure regulating wedge block, and the screw rod is threadedly connected with the pressure regulating wedge block. The pressure regulating seat is also provided with a screw rod for fixing the pressure regulating wedge block.

[0009] As a preferred technical solution of the present invention, a pointer is provided on the pressure regulating wedge block, and a dial for cooperating with the pointer is provided on the pressure regulating seat.

[0010] As a preferred technical solution of the present invention, a discharge port is provided at the bottom of the material receiving box, and a plug plate for covering the discharge port is slidably provided at the position of the discharge port on the material receiving box, guide rods are respectively provided at both ends of the plug plate, and the guide rods are slidably arranged at the bottom of the material receiving box, and a spring 2 is sleeved on the outside of the guide rod, and the two ends of the spring 2 are respectively connected to the plug plate and the material receiving box, and a push rod for hitting the guide rod is provided on the sliding seat.

[0011] As a preferred technical solution of the present invention, a waste box for storing waste is provided on the frame and at the bottom of the receiving box, and the opening of the waste box faces upward.

[0012] As a preferred technical solution of the present invention, the frame is provided with a power assembly for driving the main roller to rotate, the motor of the power assembly is fixed on the frame, and the output wheel of the power assembly is installed on the rotating shaft of the main roller.

[0013] As a preferred technical solution of the present invention, a slide is provided on the frame and located on the side of the main roller, a slide is slidably provided on the slide, a second cylinder is provided on the frame and located on the side of the slide away from the main roller, the telescopic shaft of the second cylinder is connected to the slide, a coating mixing seat is provided on the frame and located on the side of the slide close to the main roller, an electric cylinder is fixedly provided on the coating mixing seat, a coating wedge in contact with the slide is connected to the end of the telescopic shaft of the electric cylinder, the surface of the coating wedge in contact with the slide is an inclined surface, and the coating wedge is slidably provided on the coating mixing seat, a slit coating head is provided above the slide, and a liquid receiving box is provided on the slide and located below the nozzle of the slit coating head.

[0014] As a preferred technical solution of the present invention, downward pressing sliders are slidably provided on the two sides of the frame and above the main rollers, and auxiliary rollers are rotatably connected to the two downward pressing sliders. A hydraulic cylinder is provided above the downward pressing slider, and the bottom of the hydraulic cylinder is fixed on the frame, and the telescopic shaft of the hydraulic cylinder is connected to the downward pressing slider.

[0015] As a preferred technical solution of the present invention, a plurality of guide assemblies are cross-arranged on the frame, and the guide assemblies include two guide slides, which are fixed on the frame, and a guide slider is slidably provided on the guide slide, and a guide screw is rotatably provided above the guide slider on the guide slide, and the guide screw forms a threaded fit with the guide slider. A guide screw for fixing the guide screw is also provided on the guide slide, and a guide roller for guiding the reverse osmosis membrane is provided between the two guide sliders, and a static electricity removal device is provided on the frame and on both sides of the reverse osmosis membrane.

[0016] The beneficial effects of the present invention compared with the prior art are:

[0017] (1) When the reverse osmosis membrane needs to be replaced, the present invention starts the cylinder 1. After the telescopic shaft of the cylinder 1 shrinks to the limit position, the pressure roller is separated from the main roller, and the power is transmitted through the rotating frame and the connecting rod, so that the slider slides along the slide rod toward the main roller. After the slider touches the block, the slider moves toward the main roller with the block and the slide rod at the same time, and the material receiving box and the cleaning brush move to the bottom of the main roller. The cleaning brush cleans the main roller to remove the residual paint on the main roller. During this process, the top rod is separated from the guide rod, and the spring 2 provides elastic force to make the plug plate slide at the bottom of the material receiving box. The plug plate covers the discharge port, so that the waste material dropped from the cleaning brush is stored in the material receiving box to avoid secondary pollution of the equipment.

[0018] (2) According to the thickness of the reverse osmosis membrane and the thickness to be coated, the present invention loosens screw one to separate the end of screw one from the pressure regulating wedge, and then rotates screw one to make the pressure regulating wedge slide on the pressure regulating seat, so that the pointer points to different scales on the dial, thereby adjusting the contact position between the roller and the inclined surface of the pressure regulating wedge, that is, when the telescopic shaft of cylinder one is extended, the distance between the main roller and the pressure roller can be adjusted to achieve the purpose of precise control.

[0019] (3) When the present invention is coating the next roll of reverse osmosis membrane, the telescopic shaft of the cylinder 1 is extended, and the spring 1 provides elastic force to drive the slide rod and the receiving box to move away from the main roller. The push rod and the guide rod are re-contacted, and the push rod drives the guide rod and the plug plate to slide in the opposite direction at the bottom of the receiving box. The plug plate no longer covers the discharge port. At this time, the slide rod is separated from the block, and the discharge port is located directly above the opening of the waste box. The waste in the receiving box falls into the waste box along the discharge port, completing the storage of the waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 It is a structural schematic diagram of the overall cross section of the present invention.

[0022] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0023] Figure 4 It is a schematic structural diagram of the waste box installation of the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of the cooperation between the slider and the slide rod of the present invention.

[0025] Figure 6 for Figure 5 A partial enlarged view of point B in the middle.

[0026] Figure 7 It is a schematic structural diagram of the gap adjustment device of the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of the installation of the slit coating head of the present invention.

[0028] Fig. 9 This is a schematic diagram of the structure of the auxiliary roller installation of the present invention.

[0029] Fig.10 This is a schematic structural diagram of the guide roller installation of the present invention.

[0030] Fig.11 for Fig.10 A partial enlarged view of point C in the middle.

[0031] Figure numbers: 1-frame; 2-main roller; 3-rotating frame; 4-pressing roller; 5-cylinder 1; 6-articulated table; 7-connecting rod; 8-slider; 9-sliding seat; 10-sliding rod; 11-spring 1; 12-stopper; 13-material receiving box; 1301-discharging port; 14-cleaning brush; 15-roller; 16-pressure regulating seat; 17-pressure regulating wedge; 18-screw 1; 19-screw 1; 20-pointer; 21-dials; 22-insert plate; 23-guide rod; 24-spring two; 25-rod; 26-waste box; 27-slide; 28-slide plate; 29-cylinder two; 30-coating seat; 31-electric cylinder; 32-coating wedge; 33-slit coating head; 34-liquid receiving box; 35-pressing slider; 36-auxiliary roller; 37-hydraulic cylinder; 38-guide slide; 39-guide slider; 40-guide screw; 41-guide screw; 42-guide roller; 43-reverse osmosis membrane; 44-static removal device. DETAILED DESCRIPTION

[0032] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0033] Example: See Figure 1-11 Structural schematic diagram, the present invention provides the following technical solutions:

[0034] An automatic pressure-maintaining double-roll slit coating device for preparing reverse osmosis membranes comprises a frame 1, on which a main roller 2 is rotatably provided, two rotating frames 3 are provided below the main roller 2, one end of the two rotating frames 3 are rotatably provided on two inner side walls of the frame 1 respectively, a pressure roller 4 is rotatably connected to the middle parts of the two rotating frames 3 at an upper position, and the pressure roller 4 is located below the main roller 2, a cylinder 5 is provided below the rotating frames 3, the bottom of the cylinder 5 is hinged to the frame 1, and the end of the telescopic shaft of the cylinder 5 is hinged to the rotating frame 3.

[0035] When the telescopic shaft of the cylinder 5 is extended, the rotating frame 3 rotates toward the main roller 2, so that the pressure roller 4 moves closer to the main roller 2. When the reverse osmosis membrane 43 passes between the pressure roller 4 and the main roller 2, the pressure roller 4 presses the coating evenly onto the reverse osmosis membrane 43.

[0036] On the sides of both of the two turntables 3, hinge platforms 6 are vertically provided. A connecting rod 7 is hinged on the hinge platform 6. The upper end of the connecting rod 7 is hinged with a slider 8. On both sides of the frame 1 and above the connecting rod 7, slide seats 9 are provided. A slide rod 10 is slidably arranged horizontally in the slide seat 9. The slider 8 is slidably arranged on the slide rod 10. A first spring 11 is sleeved outside the slide rod 10, and both ends of the first spring 11 are respectively connected with the slide seat 9 and the slide rod 10. A stop block 12 for touching the slider 8 is provided at the middle part of the slide rod 10. The ends of the two slide rods 10 close to the main roller 2 are jointly connected with a material receiving box 13. Above the material receiving box 13, a cleaning brush 14 for cleaning the main roller 2 is provided.

[0037] Specifically, when the telescopic shaft of the first cylinder 5 contracts, the turntable 3 rotates in a direction away from the main roller 2, and the pressure roller 4 moves away from the main roller 2. The power is transmitted through the connecting rod 7, so that the slider 8 slides along the slide rod 10 in the direction of the main roller 2. After the slider 8 touches the stop block 12, the slider 8 drives the stop block 12 and the slide rod 10 to move in the direction of the main roller 2 at the same time. The first spring 11 is compressed. After the telescopic shaft of the first cylinder 5 contracts to the limit position, the cleaning brush 14 is located directly below the main roller 2, and the main roller 2 is in contact with the cleaning brush 14. After the main roller 2 rotates, the cleaning brush 14 cleans the main roller 2 to remove the residual coating on the main roller 2.

[0038] Considering that according to the different thicknesses of the reverse osmosis membrane 43, during operation, the distance between the pressure roller 4 and the main roller 2 needs to be adjusted, and the first cylinder 5 cannot perform fine control. At one end of the turntable 3 far from its hinge point, a roller 15 is rotatably provided. Above the roller 15, a gap adjusting device is provided. The gap adjusting device includes a pressure regulating seat 16. The pressure regulating seat 16 is fixedly arranged on the side of the frame 1. A pressure regulating wedge 17 for contacting the roller 15 is slidably arranged on the pressure regulating seat 16. The surface of the pressure regulating wedge 17 in contact with the roller 15 is an inclined surface. A first screw 18 is rotatably arranged on the pressure regulating seat 16 along the axis direction of the pressure regulating wedge 17. The first screw 18 is threadedly connected with the pressure regulating wedge 17. A first screw 19 for fixing the pressure regulating wedge 17 is also provided on the pressure regulating seat 16.

[0039] A pointer 20 is provided on the pressure regulating wedge 17, and a scale 21 for cooperating with the pointer 20 is provided on the pressure regulating seat 16.

[0040] Specifically, screw 19 is turned to separate the end of screw 19 from pressure-adjusting wedge 17, and screw rod 18 is then turned to slide pressure-adjusting wedge 17 on pressure-adjusting seat 16, so that pointer 20 points to different scales on dial 21, and the contact position between roller 15 and the inclined surface of pressure-adjusting wedge 17 can be adjusted. When the telescopic shaft of cylinder 15 is extended, roller 15 touches pressure-adjusting wedge 17, and the spacing between main roller 2 and pressure roller 4 is different according to the position of pressure-adjusting wedge 17. Therefore, according to the scale of dial 21 pointed by pointer 20, the spacing between main roller 2 and pressure roller 4 can be adjusted when the telescopic shaft of cylinder 15 is extended, so as to achieve the purpose of precise control.

[0041] Taking into account that the waste cleaned by the cleaning brush 14 will fall into the receiving box 13, it is necessary to promptly remove the waste in the receiving box 13. A discharge port 1301 is provided at the bottom of the receiving box 13. A plug plate 22 for covering the discharge port 1301 is slidably provided at the position of the discharge port 1301 on the receiving box 13. Guide rods 23 are respectively provided at both ends of the plug plate 22. The guide rod 23 is slidably arranged at the bottom of the receiving box 13. A spring 24 is provided on the outer sleeve of the guide rod 23. The two ends of the spring 24 are respectively connected to the plug plate 22 and the receiving box 13. A push rod 25 for hitting the guide rod 23 is provided on the slide seat 9.

[0042] A waste box 26 for storing waste is provided on the frame 1 and at the bottom of the receiving box 13, and the opening of the waste box 26 faces upward.

[0043] Specifically, when the material receiving box 13 moves toward the main roller 2, the push rod 25 separates from the guide rod 23, and the spring 24 provides elastic force to make the plug plate 22 slide at the bottom of the material receiving box 13, and the plug plate 22 covers the discharge port 1301, so that the waste material dropped from the cleaning brush 14 is stored in the material receiving box 13. When the spring 11 provides elastic force to drive the slide bar 10 and the material receiving box 13 to move away from the main roller 2, the push rod 25 and the guide rod 23 are re-contacted, and the push rod 25 drives the guide rod 23 and the plug plate 22 to slide in the opposite direction at the bottom of the material receiving box 13, and the plug plate 22 no longer covers the discharge port 1301. At this time, the discharge port 1301 is located just above the opening of the waste bin 26, and the waste material in the material receiving box 13 falls into the waste bin 26 along the discharge port 1301.

[0044] When the telescopic shaft of the cylinder 5 is extended, that is, the spring 11 provides elastic force to move the slide bar 10 and the receiving box 13 away from the main roller 2, the slider 8 will slide on the slide bar 10, and the slide bar 10 will be separated from the block 12. Therefore, by adjusting the gap adjustment device to adjust the gap between the main roller 2 and the pressure roller 4, the discharge port 1301 will always stop just above the opening of the waste box 26, ensuring that the waste can always fall into the waste box 26.

[0045] A power assembly is provided on the frame 1, the motor of the power assembly is fixed on the frame 1, the output wheel of the power assembly is installed on the rotating shaft of the main roller 2, the power assembly includes a motor, an input wheel, an output wheel and a transmission belt, the motor is installed on the frame 1, the input wheel is installed on the rotating shaft of the motor, the transmission belt is wound around the input wheel and the output wheel at the same time, the motor drives the input wheel to rotate, and the power is transmitted through the transmission belt, so as to drive the main roller 2 to rotate.

[0046] A slide 27 is provided on the frame 1 and located on the side of the main roller 2, a slide plate 28 is slidably provided on the slide 27, a cylinder 29 is provided on the frame 1 and located on the side of the slide plate 28 away from the main roller 2, the telescopic axis of the cylinder 29 is connected to the slide plate 28, a coating adjustment seat 30 is provided on the frame 1 and located on the side of the slide plate 28 close to the main roller 2, an electric cylinder 31 is fixedly provided on the coating adjustment seat 30, a coating wedge 32 in contact with the slide plate 28 is connected to the end of the telescopic axis of the electric cylinder 31, the surface of the coating wedge 32 in contact with the slide plate 28 is an inclined surface, and the coating wedge 32 is slidably provided on the coating adjustment seat 30, a slit coating head 33 is provided above the slide plate 28, and a liquid receiving box 34 is provided on the slide plate 28 and located below the nozzle of the slit coating head 33.

[0047] Specifically, the electric cylinder 31 drives the coating wedge 32 to move, adjusts the position where the inclined surface of the coating wedge 32 contacts the slide plate 28, starts the air cylinder 29, and the telescopic shaft of the air cylinder 29 extends, driving the slide plate 28 to contact the inclined surface of the coating wedge 32. At this time, the slit coating head 33 is aligned with the main roller 2. According to the different positions of the coating wedge 32 driven by the electric cylinder 31, the distance between the nozzle of the slit coating head 33 and the main roller 2 can be adjusted, so the coating effect can be adjusted.

[0048] On the two side surfaces of the frame 1 and above the main roller 2, there are sliding downward sliders 35, and auxiliary rollers 36 are connected to the two downward sliders 35 for common rotation. A hydraulic cylinder 37 is provided above the downward slider 35, and the bottom of the hydraulic cylinder 37 is fixed on the frame 1. The telescopic shaft of the hydraulic cylinder 37 is connected to the downward slider 35. A power assembly is also provided on the auxiliary roller 36. The motor of the power assembly is fixed on a downward slider 35, and the output wheel of the power assembly is installed on the auxiliary roller 36.

[0049] Specifically, the hydraulic cylinder 37 is started, and the telescopic shaft of the hydraulic cylinder 37 is extended, driving the auxiliary roller 36 to touch the reverse osmosis membrane 43 on the main roller 2, and the power component drives the auxiliary roller 36 to rotate, so that the auxiliary roller 36 assists the movement of the reverse osmosis membrane 43.

[0050] A plurality of guide assemblies are crosswisely arranged on the frame 1, and the guide assemblies include two guide slides 38, the guide slides 38 are fixedly arranged on the frame 1, a guide slider 39 is slidably arranged on the guide slide 38, and a guide screw 40 is rotatably arranged above the guide slider 39 on the guide slide 38, the guide screw 40 forms a threaded fit with the guide slider 39, and a guide screw 41 for fixing the guide screw 40 is also arranged on the guide slide 38, a guide roller 42 for guiding the reverse osmosis membrane 43 is arranged between the two guide sliders 39, and a static electricity removal device 44 is arranged on the frame 1 and on both sides of the reverse osmosis membrane 43.

[0051] When placing the reverse osmosis membrane 43, the reverse osmosis membrane 43 is passed through multiple guide assemblies in sequence, the guide slider 39 is loosened, and the guide screw 40 is turned according to the thickness of the reverse osmosis membrane 43, thereby adjusting the position of the guide slider 39 so that the guide roller 42 contacts the reverse osmosis membrane 43, and then the guide slider 39 is tightened so that the end of the guide slider 39 contacts the guide screw 40, and the guide screw 40 is locked on the guide slide 38. Before the reverse osmosis membrane 43 enters the main roller 2, the static electricity on the reverse osmosis membrane 43 is removed by the static electricity removal device 44, so that the coating is more easily applied to the reverse osmosis membrane 43.

[0052] Working principle: During the preparation, according to the thickness of the reverse osmosis membrane 43, loosen the guide slider 39, turn the guide screw 40, and adjust the position of the guide slider 39 so that the reverse osmosis membrane 43 can contact the guide roller 42 after being placed, and then tighten the guide slider 39 so that the end of the guide slider 39 contacts the guide screw 40, and the guide screw 40 is locked on the guide slide 38. According to the thickness of the reverse osmosis membrane 43 and the thickness to be coated, loosen the screw 19, separate the end of the screw 19 from the pressure regulating wedge 17, and then turn the screw 18 so that the pressure regulating wedge 17 slides on the pressure regulating seat 16, so that the pointer 20 points to different scales on the dial 21, so as to adjust the contact position between the roller 15 and the inclined surface of the pressure regulating wedge 17, that is, when the telescopic shaft of the cylinder 5 is extended, the distance between the main roller 2 and the pressure roller 4 can be adjusted to achieve the purpose of precise control. According to the thickness of the reverse osmosis membrane 43 and the thickness required for coating, the electric cylinder 31 drives the coating wedge 32 to move, and adjusts the contact position between the inclined surface of the coating wedge 32 and the slide plate 28, that is, the distance between the nozzle of the slit coating head 33 and the main roller 2 can be adjusted, so the coating effect can be adjusted.

[0053] The telescopic shaft of the cylinder 15 is extended to the half stroke, so that the pressure roller 4 does not contact the main roller 2, and the cleaning brush 14 is not located under the main roller 2. The reverse osmosis membrane 43 is placed, so that the reverse osmosis membrane 43 passes through the multiple sets of guide components in sequence, and the reverse osmosis membrane 43 is located between the pressure roller 4 and the auxiliary roller 36, and the hydraulic cylinder 37 is started, and the telescopic shaft of the hydraulic cylinder 37 is extended, driving the auxiliary roller 36 to touch the reverse osmosis membrane 43 on the main roller 2, and the power assembly of the auxiliary roller 36 is started to drive the auxiliary roller 36 to rotate, and the power assembly of the main roller 2 is started to drive the main roller 2 to rotate, and the auxiliary roller 36 and the main roller 2 jointly drive the reverse osmosis membrane 43 to move forward.

[0054] Start the cylinder 29, the telescopic shaft of the cylinder 29 extends, driving the slide plate 28 to contact the inclined surface of the coating wedge 32, at which time the slit coating head 33 is aligned with the main roller 2, and the slit coating head 33 coats the main roller 2. The telescopic shaft of the cylinder 1 5 extends, the rotating frame 3 rotates toward the main roller 2, and the pressure roller 4 moves closer to the main roller 2. When the reverse osmosis membrane 43 passes between the pressure roller 4 and the main roller 2, the pressure roller 4 presses the coating evenly on the main roller 2. At the output end of the present invention, a winding device is also provided to wind up the coated reverse osmosis membrane 43.

[0055] After a roll of reverse osmosis membrane 43 is coated, the pressure roller 4 needs to be cleaned, and the cylinder 5 is started. The telescopic shaft of the cylinder 5 contracts, and the rotating frame 3 rotates away from the main roller 2. The pressure roller 4 moves away from the main roller 2, and the power is transmitted through the connecting rod 7, so that the slider 8 slides along the slide bar 10 toward the main roller 2. After the slider 8 touches the stopper 12, the slider 8 moves toward the main roller 2 with the stopper 12 and the slide bar 10 at the same time, and the spring 11 is compressed. After the telescopic shaft of the cylinder 5 contracts to the limit position, the cleaning brush 14 is located directly below the main roller 2, and the main roller 2 contacts the cleaning brush 14, the power component drives the main roller 2 to rotate, and the cleaning brush 14 cleans the main roller 2 to remove the residual paint on the main roller 2. During this process, the top rod 25 is separated from the guide rod 23, and the spring 24 provides elastic force to make the plug plate 22 slide at the bottom of the receiving box 13. The plug plate 22 covers the discharge port 1301, so that the waste dropped from the cleaning brush 14 is stored in the receiving box 13 to avoid secondary pollution of the equipment.

[0056] When coating the next roll of reverse osmosis membrane 43, the telescopic shaft of cylinder 15 is extended, and spring 11 provides elastic force, driving the slide bar 10 and the material receiving box 13 to move away from the main roller 2, and the push rod 25 and the guide rod 23 are re-contacted, and the push rod 25 drives the guide rod 23 and the plug plate 22 to slide in the opposite direction at the bottom of the material receiving box 13, and the plug plate 22 no longer covers the discharge port 1301. At this time, the slide bar 10 is separated from the stopper 12, and the discharge port 1301 is located just above the opening of the waste box 26. The waste in the material receiving box 13 falls into the waste box 26 along the discharge port 1301, completing the storage of the waste.

[0057] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. An automatic pressure-maintaining roller slit coating device for reverse osmosis membrane preparation, comprising a frame (1), characterized in that: A main roller (2) is rotatably provided on the frame (1), two rotating frames (3) are provided below the main roller (2), one end of the two rotating frames (3) are rotatably provided on two inner side walls of the frame (1), and a pressure roller (4) is rotatably connected to the middle part of the two rotating frames (3) at the upper position, and the pressure roller (4) is located below the main roller (2). A cylinder (5) is provided below the rotating frame (3), the bottom of the cylinder (5) is hinged to the frame (1), and the end of the telescopic shaft of the cylinder (5) is hinged to the rotating frame (3); The sides of the two rotating frames (3) are vertically provided with hinged tables (6), a connecting rod (7) is hinged on the hinged tables (6), a slider (8) is hinged on the upper end of the connecting rod (7), a slide seat (9) is provided on the two sides of the frame (1) and above the connecting rod (7), a slide rod (10) is provided in the slide seat (9) for sliding along the horizontal direction, the slider (8) is slidably arranged on the slide rod (10), a spring (11) is provided on the outer sleeve of the slide rod (10), and the two ends of the spring (11) are respectively connected to the slide seat (9) and the slide rod (10), a stopper (12) for contacting with the slider (8) is provided in the middle part of the slide rod (10), and the ends of the two slide rods (10) close to the main roller (2) are commonly connected to a material receiving box (13), and a cleaning brush (14) for cleaning the main roller (2) is provided above the material receiving box (13); A roller (15) is rotatably provided at one end of the rotating frame (3) away from the hinge point, and a gap adjustment device is provided above the roller (15), the gap adjustment device comprising a pressure regulating seat (16), the pressure regulating seat (16) is fixedly provided on the side of the frame (1), a pressure regulating wedge (17) for contacting the roller (15) is slidably provided on the pressure regulating seat (16), the contact surface of the pressure regulating wedge (17) with the roller (15) is an inclined surface, a screw rod (18) is rotatably provided on the pressure regulating seat (16) along the axial direction of the pressure regulating wedge (17), the screw rod (18) is threadedly connected with the pressure regulating wedge (17), and a screw rod (19) for fixing the pressure regulating wedge (17) is also provided on the pressure regulating seat (16); A slide (27) is provided on the frame (1) and located beside the main roller (2); a slide plate (28) is slidably provided on the slide plate (27); a second cylinder (29) is provided on the frame (1) and located beside the slide plate (28) away from the main roller (2); a telescopic shaft of the second cylinder (29) is connected to the slide plate (28); a coating seat (30) is provided on the frame (1) and located beside the slide plate (28) close to the main roller (2); An electric cylinder (31) is fixedly provided, and the end of the telescopic shaft of the electric cylinder (31) is connected to a coating wedge (32) in contact with the slide plate (28), the surface of the coating wedge (32) in contact with the slide plate (28) is an inclined surface, and the coating wedge (32) is slidably provided on the coating mixing seat (30), a slit coating head (33) is provided above the slide plate (28), and a liquid receiving box (34) is provided on the slide plate (28) and below the nozzle of the slit coating head (33).

2. The automatic pressure-maintaining roller slit coating equipment for reverse osmosis membrane preparation according to claim 1, characterized in that: The pressure regulating wedge (17) is provided with a pointer (20), and the pressure regulating seat (16) is provided with a dial (21) for cooperating with the pointer (20).

3. The automatic pressure-maintaining roller slit coating equipment for reverse osmosis membrane preparation according to claim 2, characterized in that: The bottom of the material receiving box (13) is provided with a discharge port (1301), and a plug plate (22) for covering the discharge port (1301) is slidably provided on the material receiving box (13) at the position of the discharge port (1301), and guide rods (23) are respectively provided at both ends of the plug plate (22), and the guide rods (23) are slidably provided at the bottom of the material receiving box (13), and a second spring (24) is sleeved on the outside of the guide rod (23), and the two ends of the second spring (24) are respectively connected to the plug plate (22) and the material receiving box (13), and a push rod (25) for hitting the guide rod (23) is provided on the slide seat (9).

4. The automatic pressure-maintaining roller slit coating equipment for reverse osmosis membrane preparation according to claim 3, characterized in that: A waste material box (26) for storing waste material is provided on the frame (1) and at the bottom of the material receiving box (13), and the opening of the waste material box (26) faces upward.

5. The automatic pressure-maintaining roller slit coating equipment for reverse osmosis membrane preparation according to claim 1, characterized in that: The frame (1) is provided with a power assembly for driving the main roller (2) to rotate, the motor of the power assembly is fixedly arranged on the frame (1), and the output wheel of the power assembly is mounted on the rotating shaft of the main roller (2).

6. The automatic pressure-maintaining roller slit coating equipment for reverse osmosis membrane preparation according to claim 1, characterized in that: On the two side surfaces of the frame (1) and above the main roller (2), there are slidingly provided downward pressing sliders (35), the two downward pressing sliders (35) are rotatably connected to auxiliary rollers (36), a hydraulic cylinder (37) is provided above the downward pressing sliders (35), the bottom of the hydraulic cylinder (37) is fixed on the frame (1), and the telescopic shaft of the hydraulic cylinder (37) is connected to the downward pressing slider (35).

7. An automatic pressure-maintaining roller slit coating equipment for reverse osmosis membrane preparation according to any one of claims 1 to 6, characterized in that: The frame (1) is cross-arranged with a plurality of guide assemblies, the guide assemblies comprising two guide slides (38), the guide slides (38) being fixedly arranged on the frame (1), a guide slider (39) being slidably arranged on the guide slides (38), and a guide screw (40) being rotatably arranged above the guide slider (39) on the guide slides (38), the guide screw (40) and the guide slider (39) forming a threaded fit, the guide slides (38) being further provided with a guide screw (41) for fixing the guide screw (40), a guide roller (42) for guiding the reverse osmosis membrane (43) being arranged between the two guide sliders (39), and a static electricity removal device (44) being arranged on the frame (1) and on both sides of the reverse osmosis membrane (43).

Images