Diaphragm coating equipment

Abstract

The membrane coating equipment of the present invention comprises: a frame; a membrane pair of rollers, the membrane pair of rollers comprises a membrane support pair of rollers and a fabric support pair of rollers, the membrane support pair of rollers is used to support the membrane, the fabric support pair of rollers is used to support the fabric, the membrane support pair of rollers and the fabric support pair of rollers cooperate to form a membrane after rolling the membrane, the fabric and the slurry, and each of the membrane support pair of rollers and the fabric support pair of rollers is adjustable in the first direction on the frame; a slurry hopper, the slurry hopper is located above the membrane pair of rollers, and the discharge port of the slurry hopper is located between the membrane support pair of rollers and the fabric support pair of rollers in the first direction; an adjustment part, the adjustment part is located below the membrane pair of rollers, and the adjustment part is used to support the side of the membrane facing away from the fabric. Therefore, the membrane coating equipment according to the present invention has the advantages of facilitating the production of membranes, adjusting the thickness of the membranes and the position of the fabric in the slurry layer.

Description

Technical Field

[0001] The invention relates to the technical field of coating, and in particular to a diaphragm coating device. Background Art

[0002] In an alkaline electrolyzer, in order to prevent the H2 produced by the cathode from mixing with the O2 produced by the anode, a diaphragm is needed to separate H2 and O2. Therefore, the quality of the diaphragm is directly related to the purity and power consumption of H2 and O2. At present, the widely used diaphragm in the industry is a new type of composite diaphragm based on polyphenylene sulfide (PPS) fabric. How to achieve high-quality continuous production of composite diaphragms has become a difficult problem that needs to be solved in the field of electrolysis of water to produce hydrogen technology. Coating technology plays a vital role in the production process of composite diaphragms. The form of the coating device will directly affect the product quality of the composite diaphragm. Previous coating devices are difficult to apply to the preparation of alkaline water electrolysis hydrogen production diaphragms, and more or less product problems such as product thickness fluctuations, PPS fabric cannot be in the middle of the separator, and PPS fabric gap filling is insufficient. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a membrane coating device.

[0004] The membrane coating device according to the embodiment of the present invention comprises:

[0005] Frame;

[0006] A pair of diaphragm rollers, the pair of diaphragm rollers comprising a pair of film support rollers and a pair of fabric support rollers, the pair of film support rollers being used to support a diaphragm, the pair of fabric support rollers being used to support a fabric, the pair of film support rollers cooperating with the pair of fabric support rollers so as to form a diaphragm after rolling the diaphragm, the fabric and the slurry, the pair of film support rollers and the pair of fabric support rollers being rotatably arranged on the frame, the pair of film support rollers and the pair of fabric support rollers being arranged side by side in a first direction, the position of each of the pair of film support rollers and the pair of fabric support rollers on the frame in the first direction being adjustable, the rotation axis of the pair of film support rollers and the rotation axis of the pair of fabric support rollers are both in the second direction, and any two of the first direction, the second direction and the up and down directions are perpendicular to each other;

[0007] A slurry hopper, the slurry hopper is located above the membrane pair of rollers, and a discharge port of the slurry hopper is located between the membrane support pair of rollers and the fabric support pair of rollers in the first direction;

[0008] An adjusting part is located below the diaphragm roller pair and is used to support the side of the diaphragm facing away from the fabric.

[0009] In some embodiments, at least one extrusion coating head is disposed on the frame, and the extrusion coating head is used to pre-coat at least one side of the fabric, and the diaphragm roller forms a diaphragm by rolling the diaphragm, the pre-coated fabric and the slurry.

[0010] In some embodiments, a first extrusion coating head is provided on the frame, and the first extrusion coating head is located above and adjacent to the pair of fabric support rollers, and the discharge port of the first extrusion coating head faces downward, and the first extrusion coating head is used to pre-coat the upper surface of the fabric on the pair of fabric support rollers.

[0011] In some embodiments, a second extrusion coating head and a first support roller are provided on the frame, the discharge port of the second extrusion coating head is facing upward in the up-down direction, the first support roller is rotatably provided on the frame, the first support roller is used to tension the fabric, the rotation axis of the first support roller is the second direction, the second extrusion coating head is located below the first support roller and adjacent to the first support roller, the fabric is located between the first support roller and the second extrusion coating head, and the second extrusion coating head is used to pre-coat the lower surface of the fabric below the first support roller.

[0012] In some embodiments, a smoothing portion is provided on the frame, and the smoothing portion is located below the adjusting portion. The smoothing portion includes a fourth support roller and a smoothing mechanism scraper. The fourth support roller is rotatably provided on the frame, and the rotation axis of the fourth support roller is the second direction. The fourth support roller and the smoothing mechanism scraper are located on both sides of the diaphragm in the first direction. The fourth support roller is used to support the membrane sheet of the diaphragm, and the position of the smoothing mechanism scraper in the first direction is adjustable.

[0013] In some embodiments, there are multiple smoothing parts, and the multiple smoothing parts are sequentially arranged on the frame along the up and down direction;

[0014] The smoothing part includes a receiving plate, a movable cylinder and a fine-adjustment part. The scraper of the smoothing mechanism is rotatably arranged on the receiving plate. The movable cylinder and the fine-adjustment part can both drive the receiving plate to move in a first direction. The moving distance of the receiving plate driven by the movable cylinder in the first direction is greater than the moving distance of the receiving plate driven by the fine-adjustment part in the first direction.

[0015] In some embodiments, the adjusting portion is adjacent to the diaphragm pair of rollers in the up and down directions, the adjusting portion is an adjusting roller, the adjusting roller is rotatably provided on the frame, the rotation axis of the adjusting roller is the second direction, and the pressure of the adjusting roller on the diaphragm is adjusted by adjusting the distance between the diaphragm pair of rollers and the adjusting roller in the first direction.

[0016] In some embodiments, a feeding nozzle is provided on the frame, and the feeding nozzle is used to feed the slurry hopper;

[0017] The film supporting pair of rollers and the fabric supporting pair of rollers are located on the same horizontal plane;

[0018] The distance between the adjusting portion and the diaphragm roller pair in the up-down direction is less than or equal to 200 mm.

[0019] In some embodiments, the frame is provided with

[0020] A first unwinding device, the first unwinding device is used to release the film roll;

[0021] a second supporting roller, wherein the rotation axis of the second supporting roller is the second direction, the second supporting roller is located between the first unwinding device and the diaphragm roller pair in the first direction, and the second supporting roller is used to support the diaphragm;

[0022] a second unwinding device, the second unwinding device being used for unwinding the fabric roll;

[0023] A third support roller, the rotation axis of the third support roller is the second direction, the third support roller is located between the second unwinding device and the diaphragm roller pair in the first direction, and the third support roller is used to support the fabric.

[0024] The diaphragm coating equipment of the embodiment of the present invention includes a gel tank, a cleaning tank and a film winding mechanism, the gel tank is located below the diaphragm roller pair, and a plurality of conveying rollers are provided in the gel tank and the cleaning tank, the conveying rollers are used to convey and support the diaphragm, the film winding mechanism is used to separate the film in the diaphragm, the film winding mechanism includes a winding frame, a first separation roller, a diaphragm winding portion and a film winding portion, the first separation roller, the diaphragm winding portion and the film winding portion are arranged on the winding frame, the first separation roller can rotate relative to the winding machine, the first separation roller is used to support the fabric, the fabric winding portion is used to wind the diaphragm body in the diaphragm, and the film winding portion is used to wind the film in the diaphragm.

[0025] Beneficial effects of the diaphragm coating equipment according to the embodiment of the present invention: The diaphragm coating equipment according to the embodiment of the present invention is provided with an extrusion coating head to pre-coat the fabric, so as to fully fill the gaps in the fabric with pressurized slurry to ensure that the gaps are filled after passing through the diaphragm roller pair. An adjustment part is installed under the diaphragm roller pair. By changing the relative distance between the diaphragm roller pair and the adjustment part in the first direction, the wrap angle between the diaphragm and the adjustment part is adjusted to control the squeezing force of the fabric on the slurry, squeeze out part of the slurry from the slits of the fabric, thereby solving the problem of centering the fabric in the slurry. The smoothing part under the adjustment part can adjust the thickness of the diaphragm and make the membrane surface smoother. Therefore, the diaphragm coating equipment according to the embodiment of the present invention has the advantages of facilitating the production of diaphragms, adjusting the thickness of the diaphragms and the position of the fabric in the slurry layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of a membrane coating device according to an embodiment of the present invention.

[0027] Figure 2 is a schematic diagram of a first extrusion coating head according to an embodiment of the present invention.

[0028] Figure 3 is a schematic diagram of a second extrusion coating head according to an embodiment of the present invention.

[0029] Figure 4 Schematic diagram of a smoothing portion according to an embodiment of the present invention.

[0030] Figure 5 is a schematic diagram of a gel tank according to an embodiment of the present invention.

[0031] Figure 6 Schematic diagram of a film winding mechanism according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] 1. frame, 11. slurry hopper, 12. feed nozzle, 13. first extrusion coating head, 14. second extrusion coating head, 15. first support roller;

[0034] 2. Diaphragm roller pair, 21. Film support roller pair, 22. Fabric support roller pair;

[0035] 3. Adjustment Department;

[0036] 4. Smoothing part, 41. Fourth supporting roller, 42. Smoothing mechanism scraper, 43. Receiving plate, 44. Moving cylinder, 45. Fine adjustment part, 46. Connecting plate;

[0037] 5. a first unwinding device, 51. a second supporting roller;

[0038] 6. second unwinding device, 61. third supporting roller;

[0039] 71. gel tank, 72. cleaning tank, 73. conveying roller;

[0040] 8. Diaphragm winding mechanism, 81. Winding frame, 82. First separation roller, 83. Diaphragm winding section, 84. Film winding section. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0042] The following describes the membrane coating device according to an embodiment of the present invention with reference to the accompanying drawings. Figures 1 to 6 As shown, the membrane coating device according to an embodiment of the present invention includes a frame 1, a membrane roller pair 2, a slurry bucket 11 and a regulating part 3.

[0043] The diaphragm roller pair 2 includes a film supporting roller pair 21 and a fabric supporting roller pair 22. The film supporting roller pair 21 is used to support the diaphragm, and the fabric supporting roller pair 22 is used to support the fabric. The film supporting roller pair 21 cooperates with the fabric supporting roller pair 22 to form a diaphragm after rolling the diaphragm, fabric and slurry.

[0044] The film supporting roller pair 21 and the fabric supporting roller pair 22 are rotatably arranged on the frame 1, and the film supporting roller pair 21 and the fabric supporting roller pair 22 are arranged side by side in the first direction. The position of each of the film supporting roller pair 21 and the fabric supporting roller pair 22 in the first direction on the frame 1 is adjustable, thereby making the gap between the film supporting roller pair 21 and the fabric supporting roller pair 22 in the first direction adjustable, thereby making the coating thickness adjustable, and the position of the diaphragm roller pair 2 in the first direction adjustable.

[0045] The rotation axis of the film support roller pair 21 and the rotation axis of the fabric support roller pair 22 are both in the second direction, and any two of the first direction, the second direction and the up-down direction are perpendicular. The first direction can be the left-right direction, and the second direction can be the front-back direction. For example, the film support roller pair 21 and the fabric support roller pair 22 are arranged side by side in the left-right direction, and the position of each of the film support roller pair 21 and the fabric support roller pair 22 in the left-right direction on the frame 1 is adjustable, and the rotation axis of the film support roller pair 21 and the rotation axis of the fabric support roller pair 22 are both in the front-back direction. The frame 1 is provided with a moving member for connecting with the film support roller pair 21 and the fabric support roller pair 22, and the moving frame can drive the film support roller pair 21 and the fabric support roller pair 22 to move in the first direction (left-right direction). The film is a PET film (polyethylene terephthalate film), and the fabric is a PPS fabric (polyphenylene sulfide fabric).

[0046] The film supporting roller pair 21 and the fabric supporting roller pair 22 are located on the same horizontal plane. Specifically, the axis centers of the film supporting roller pair 21 and the fabric supporting roller pair 22 are located on the same horizontal plane. For example, the outer diameters of the film supporting roller pair 21 and the fabric supporting roller pair 22 are equal.

[0047] like Figure 1 As shown, in some embodiments, a first unwinding device 5 , a second supporting roller 51 , a third unwinding device 6 and a third supporting roller 61 are provided on the frame 1 .

[0048] The first unwinding device 5 is used to release the film roll, the rotation axis of the second support roller 51 is the second direction, the second support roller 51 is located between the first unwinding device 5 and the diaphragm roller pair 2 in the first direction, and the second support roller 51 is used to support the film. Specifically, the first unwinding device 5 can provide the diaphragm roller pair 2 with a film, and the first unwinding device 5 includes a plurality of rollers to tension and support the film. The second support roller 51 is located below the film and abuts against the lower surface of the film to support the film. For example, the rotation axis of the second support roller 51 is the front-to-back direction, and the second support roller 51 is located between the first unwinding device 5 and the diaphragm roller pair 2 in the left-right direction.

[0049] The second unwinding device 6 is used to release the fabric roll. The rotation axis of the third support roller 61 is the second direction. The third support roller 61 is located between the second unwinding device 6 and the diaphragm roller pair 2 in the first direction. The third support roller 61 is used to support the fabric. Specifically, the second unwinding device 6 can provide fabric to the diaphragm roller pair 2. The second unwinding device 6 includes a plurality of rollers to tension the fabric. The third support roller 61 is located below the fabric and abuts against the lower surface of the fabric to support the fabric. For example, the rotation axis of the third support roller 61 is the front-to-back direction. The third support roller 61 is located between the second unwinding device 6 and the diaphragm roller pair 2 in the left-right direction.

[0050] The first unwinding device 5 and the second unwinding device 6 simultaneously unwind the film and the fabric to ensure that the two materials advance at the same speed, and the coating process on both sides of the fabric is completed through the diaphragm roller pair 2.

[0051] like Figure 1As shown, the slurry hopper 11 is located above the membrane pair of rollers 2, and the discharge port of the slurry hopper 11 is located between the membrane support pair of rollers 21 and the fabric support pair of rollers 22 in the first direction. Specifically, a feed nozzle 12 is provided on the frame 1, and the feed nozzle 12 is used to feed the slurry hopper 11. The discharge port of the slurry hopper 11 faces the lower side. The slurry hopper 11 can store a certain height of slurry and apply the slurry by the gravity of the slurry itself. The discharge port of the slurry hopper 11 is located directly above the gap between the membrane support pair of rollers 21 and the fabric support pair of rollers 22 in the first direction, thereby reducing the distance between the membrane and the fabric and the coating process. The slurry hopper 11 evenly transports the slurry to the middle of the membrane pair of rollers 2. Through the advancement of the membrane (PET film) and the fabric (PPS fabric), the material is then subjected to a large extrusion force, thereby fully filling the gap of the fabric, and the membrane plays a certain supporting role during the advancement process. The membrane, fabric and slurry are rolled by the membrane pair of rollers 2 to form a membrane. The thickness of the separator is adjusted by adjusting the gap between the film supporting roller pair 21 and the fabric supporting roller pair 22 in the first direction.

[0052] The adjusting part 3 is located below the diaphragm roller pair 2, and the adjusting part 3 is used to support the side of the (diaphragm) diaphragm facing away from the fabric. Specifically, the adjusting part 3 is adjacent to the diaphragm roller pair 2 in the up and down direction, and the adjusting part 3 is an adjusting roller, which is rotatably arranged on the frame 1, and the rotation axis of the adjusting roller is the second direction. The adjusting roller supports the (diaphragm) diaphragm. And each of the membrane support roller pair 21 and the fabric support roller pair 22 is adjustable in position in the first direction on the frame 1, and the pressure of the adjusting roller on the diaphragm is adjusted by adjusting the distance between the diaphragm roller pair 2 and the adjusting roller in the first direction. Therefore, by adjusting the position of the diaphragm roller pair 2 in the first direction, the positional relationship between the adjusting part 3 and the diaphragm roller pair 2 in the first direction is changed, thereby changing the magnitude of the downward pressure of the fabric (PPS fabric), and then changing the position of the fabric (PPS fabric) in the coating layer. For example, when the distance between the diaphragm roller 2 and the adjusting part 3 in the first direction increases, the pressure of the adjusting roller on the diaphragm (diaphragm) increases, and the increase in the downward pressure of the fabric (PPS fabric) can cause the fabric (PPS fabric) to move to a position adjacent to the diaphragm in the coating layer.

[0053] In some embodiments, the distance between the adjusting part 3 and the membrane roller pair 2 (gap) in the vertical direction is less than or equal to 200 mm, and the adjusting roller is adjacent to the film supporting roller pair 21. For example, the distance between the adjusting part 3 (adjusting roller) and the membrane roller pair 2 in the vertical direction is 100 mm, 50 mm, 30 mm, 20 mm or 10 mm.

[0054] like Figures 1 to 3As shown, in some embodiments, at least one extrusion coating head is provided on the frame 1, and the extrusion coating head is used to pre-coat at least one side of the fabric. The diaphragm roller 2 rolls the diaphragm, the pre-coated fabric and the slurry to form a diaphragm. Specifically, the extrusion coating head is located upstream of the diaphragm roller 2 in the coating process of the fabric, and the extrusion coating head pre-coates the fabric before the fabric enters the gap between the diaphragm roller 2. Specifically, the slurry sprayed by the extrusion coating head has a preset pressure, and the slurry sprayed by the extrusion coating head can fully fill the gap of the fabric (PPS fabric). By changing the path of the fabric (PPS fabric) and the position of the extrusion coating head, a multi-layer coating is achieved by applying different slurries.

[0055] like Figure 1 and Figure 2 As shown, in some embodiments, the frame 1 is provided with a first extrusion coating head 13, which is located above and adjacent to the fabric support roller pair 22, with the discharge port of the first extrusion coating head 13 facing downward, and the first extrusion coating head 13 is used to pre-coat the upper surface of the fabric on the fabric support roller pair 22. Specifically, the first extrusion coating head 13 is located directly above the top of the fabric support roller pair 22. For example, the slurry sprayed by the first extrusion coating head 13 is the same slurry as the slurry in the slurry hopper 11.

[0056] like Figure 3 As shown, in some embodiments, a second extrusion coating head 14 and a first support roller 15 are provided on the frame 1. The discharge port of the second extrusion coating head 14 faces upward in the up-down direction, and the first support roller 15 is rotatably provided on the frame 1, and the first support roller 15 is used to tension the fabric. The rotation axis of the first support roller 15 is the second direction, the second extrusion coating head 14 is located below the first support roller 15 and adjacent to the first support roller 15, the fabric is located between the first support roller 15 and the second extrusion coating head 14, and the second extrusion coating head 14 is used to pre-coat the lower surface of the fabric below the first support roller 15. Specifically, the outlet of the second extrusion coating head 14 is inclined upward, and the second extrusion coating head 14 can pre-coat the side of the fabric facing away from the diaphragm. For example, the rotation axis of the first support roller 15 is the front-to-back direction.

[0057] like Figures 1 to 4 As shown, in some embodiments, a smoothing part 4 is provided on the frame 1, and the smoothing part 4 is located below the adjusting part 3. There are multiple smoothing parts 4, and the multiple smoothing parts 4 are sequentially arranged on the frame 1 along the up and down directions, and the multiple smoothing parts 4 can work alternately.

[0058] The smoothing part 4 includes a fourth support roller 41, a smoothing mechanism scraper 42, a receiving plate 43, a movable cylinder 44 and a fine-tuning part 45. The fourth support roller 41 is rotatably arranged on the frame 1, and the rotation axis of the fourth support roller 41 is the second direction. The fourth support roller 41 and the smoothing mechanism scraper 42 are located on both sides of the diaphragm in the first direction. The fourth support roller 41 is used to support the membrane of the diaphragm, and the position of the smoothing mechanism scraper 42 in the first direction is adjustable. Specifically, two smoothing parts 4 are arranged on the frame 1, and the thickness of the final coating is controlled by adjusting the gap between the fourth support roller 41 and the smoothing mechanism scraper 42. Two groups of smoothing parts 4 can realize the continuity of the entire film making process. When one group needs to be cleaned, the other group of cleaned smoothing parts 4 moves to the working position. After smoothing the membrane in the gap between the two, the group that needs to be cleaned returns to the cleaning position for cleaning.

[0059] The scraper 42 of the smoothing mechanism is rotatably arranged on the receiving tray 43. Specifically, the scraper 42 of the smoothing mechanism can adjust the angle with the blade as the center of the circle. The scraper 42 of the smoothing mechanism is located above the receiving tray 43, and the receiving tray 43 stores the scraped excess slurry. The receiving tray 43 is provided with a limit screw, which is threadedly connected to the receiving tray 43 and can abut against the scraper 42 of the smoothing mechanism. After the scraper 42 of the smoothing mechanism rotates relative to the receiving tray 43, the limit screw abuts against the receiving tray 43 to limit the scraper 42 of the smoothing mechanism, thereby facilitating the adjustment of the angle of the scraper 42 of the smoothing mechanism. By adjusting the angle of the scraper 42 of the smoothing mechanism, the influence of the accumulation of excess slurry on the coating film is controlled.

[0060] Both the moving cylinder 44 and the fine-adjusting part 45 can drive the receiving tray 43 to move in the first direction, and the moving distance of the receiving tray 43 driven by the moving cylinder 44 in the first direction is greater than the moving distance of the receiving tray 43 driven by the fine-adjusting part 45 in the first direction. Specifically, the receiving tray 43 is fixed on the connecting plate 46, and the bottom of the connecting plate 46 is provided with a slide rail extending along the first direction. The telescopic parts of the two moving cylinders 44 are connected to the connecting plate 46 so as to drive the connecting plate 46, the scraper 42 of the smoothing mechanism, and the receiving tray 43 to move between the cleaning position and the smoothing position. The fine-adjusting part 45 is a screw transmission mechanism, and the fine-adjusting part 45 is connected to the connecting plate 46. The fine-adjusting part 45 has high adjustment accuracy, which can facilitate the adjustment of the gap between the fourth support roller 41 and the scraper 42 of the smoothing mechanism to control the thickness of the final coating film.

[0061] like Figure 1 , Figure 5 and Figure 6 As shown, in some embodiments, the membrane coating device includes a gel tank 71, a cleaning tank 72 and a film winding mechanism 8. The gel tank 71, the cleaning tank 72 and the film winding mechanism 8 are arranged sequentially in the first direction. For example, there are two gel tanks 71, two cleaning tanks 72, and two gel tanks 71, two cleaning tanks 72 and the film winding mechanism 8 are arranged sequentially in the left and right directions.

[0062] The gel tank 71 is used to gel the diaphragm, and the gel tank 71 is located below the diaphragm roller pair 2. Specifically, the gel tank 71 is located directly below the diaphragm roller pair 2, so that the diaphragm that has completed the coating process can enter the next process in the shortest time.

[0063] The cleaning tank 72 is used to clean the diaphragm. Multiple conveying rollers 73 are provided in the gel tank 71 and the cleaning tank 72. Multiple conveying rollers 73 cooperating with the diaphragm are provided on the frame 1. The conveying rollers 73 are used to convey and support the diaphragm. The conveying rollers 73 are active rollers, which change with the adjustment of the speed of the whole machine. Multiple conveying rollers 73 are provided at the upper and lower parts of the gel tank 71 and the cleaning tank 72 to increase the flow path of the diaphragm.

[0064] like Figure 6 As shown, the film winding mechanism 8 is used to separate the film in the diaphragm, and the film winding mechanism 8 includes a winding frame 81, a first separation roller 82, a diaphragm winding part 83 and a film winding part 84. The first separation roller 82, the diaphragm winding part 83 and the film winding part 84 are arranged on the winding frame 81. The first separation roller 82 can rotate relative to the winding machine. The first separation roller 82 is used to support the fabric, the fabric winding part is used to wind the diaphragm body in the diaphragm, and the film winding part 84 is used to wind the film in the diaphragm. The film coming out of the cleaning tank 72 is separated into the diaphragm body and the film (PET film) by the first separation roller 82, and then the diaphragm winding part 83 and the film winding part 84 on the upper and lower sides perform the winding operation.

[0065] The diaphragm coating equipment according to the embodiment of the present invention is provided with an extrusion coating head to pre-coat the fabric, so as to fully fill the gaps of the fabric with pressurized slurry to ensure that the gaps are filled after passing through the diaphragm roller pair 2. An adjusting part 3 is installed below the diaphragm roller pair 2, and the relative distance between the diaphragm roller pair 2 and the adjusting part 3 in the first direction is changed. The wrap angle between the diaphragm and the adjusting part 3 is adjusted to control the squeezing force of the fabric on the slurry, and part of the slurry is squeezed out from the gaps of the fabric, thereby solving the problem of the centering of the fabric in the slurry. The smoothing part 4 below the adjusting part 3 can adjust the thickness of the diaphragm and make the membrane surface smoother. Therefore, the diaphragm coating equipment according to the embodiment of the present invention has the advantages of facilitating the production of diaphragms, adjusting the thickness of the diaphragms and the position of the fabric in the slurry layer.

[0066] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0067] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0070] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0071] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A membrane coating device, characterized in that: include: Frame; A pair of diaphragm rollers, the pair of diaphragm rollers comprising a pair of film support rollers and a pair of fabric support rollers, the pair of film support rollers being used to support a diaphragm, the pair of fabric support rollers being used to support a fabric, the pair of film support rollers cooperating with the pair of fabric support rollers so as to form a diaphragm after rolling the diaphragm, the fabric and the slurry, the pair of film support rollers and the pair of fabric support rollers being rotatably arranged on the frame, the pair of film support rollers and the pair of fabric support rollers being arranged side by side in a first direction, the position of each of the pair of film support rollers and the pair of fabric support rollers on the frame in the first direction being adjustable, the rotation axis of the pair of film support rollers and the rotation axis of the pair of fabric support rollers are both in the second direction, and any two of the first direction, the second direction and the up and down directions are perpendicular to each other; A slurry hopper, the slurry hopper is located above the membrane pair of rollers, and a discharge port of the slurry hopper is located between the membrane support pair of rollers and the fabric support pair of rollers in the first direction; An adjusting part, the adjusting part is located below the diaphragm roller pair, and the adjusting part is used to support the side of the diaphragm facing away from the fabric; At least one extrusion coating head is arranged on the frame, and the extrusion coating head is used to pre-coat at least one side of the fabric. The diaphragm rollers roll the diaphragm sheet, the pre-coated fabric and the slurry to form a diaphragm.

2. The membrane coating device according to claim 1, characterized in that: A first extrusion coating head is provided on the frame, and the first extrusion coating head is located above and adjacent to the fabric support roller pair, and the discharge port of the first extrusion coating head faces downward, and the first extrusion coating head is used for pre-coating the upper surface of the fabric on the fabric support roller pair.

3. The membrane coating device according to claim 1, characterized in that: A second extrusion coating head and a first support roller are provided on the frame, a material outlet of the second extrusion coating head faces upward in the up-down direction, the first support roller is rotatably provided on the frame, the first support roller is used for tensioning the fabric, the rotation axis of the first support roller is the second direction, the second extrusion coating head is located below the first support roller and adjacent to the first support roller, the fabric is located between the first support roller and the second extrusion coating head, and the second extrusion coating head is used for pre-coating the lower surface of the fabric below the first support roller.

4. The membrane coating device according to claim 1, characterized in that: A smoothing portion is provided on the frame, and the smoothing portion is located below the adjusting portion. The smoothing portion includes a fourth support roller and a smoothing mechanism scraper. The fourth support roller is rotatably provided on the frame, and the rotation axis of the fourth support roller is the second direction. The fourth support roller and the smoothing mechanism scraper are located on both sides of the diaphragm in the first direction. The fourth support roller is used for supporting the membrane sheet of the diaphragm, and the position of the smoothing mechanism scraper in the first direction is adjustable.

5. The membrane coating device according to claim 4, characterized in that: There are multiple smoothing parts, and the multiple smoothing parts are sequentially arranged on the frame along the up and down direction; The smoothing part includes a receiving plate, a movable cylinder and a fine-adjustment part. The scraper of the smoothing mechanism is rotatably arranged on the receiving plate. The movable cylinder and the fine-adjustment part can both drive the receiving plate to move in a first direction. The moving distance of the receiving plate driven by the movable cylinder in the first direction is greater than the moving distance of the receiving plate driven by the fine-adjustment part in the first direction.

6. The membrane coating device according to claim 1, characterized in that: The adjusting portion is adjacent to the diaphragm roller pair in the up and down directions. The adjusting portion is an adjusting roller. The adjusting roller is rotatably disposed on the frame. The rotating axis of the adjusting roller is the second direction. The pressure of the adjusting roller on the diaphragm is adjusted by adjusting the distance between the diaphragm roller pair and the adjusting roller in the first direction.

7. The membrane coating device according to claim 6, characterized in that: The frame is provided with a feeding nozzle, and the feeding nozzle is used to feed the slurry hopper; The film supporting pair of rollers and the fabric supporting pair of rollers are located on the same horizontal plane; The distance between the adjusting portion and the diaphragm roller pair in the up-down direction is less than or equal to 200 mm.

8. The membrane coating device according to claim 1, characterized in that: The frame is provided with A first unwinding device, the first unwinding device is used to release the film roll; a second supporting roller, wherein the rotation axis of the second supporting roller is the second direction, the second supporting roller is located between the first unwinding device and the diaphragm roller pair in the first direction, and the second supporting roller is used to support the diaphragm; a second unwinding device, the second unwinding device being used for unwinding the fabric roll; A third support roller, the rotation axis of the third support roller is the second direction, the third support roller is located between the second unwinding device and the diaphragm roller pair in the first direction, and the third support roller is used to support the fabric.

9. The membrane coating device according to any one of claims 1 to 8, characterized in that: It includes a gel tank, a cleaning tank and a membrane winding mechanism, the gel tank is located below the membrane roller pair, the gel tank and the cleaning tank are both provided with a plurality of conveying rollers, the conveying rollers are used to convey and support the membrane, the membrane winding mechanism is used to separate the membrane in the membrane, the membrane winding mechanism includes a winding frame, a first separation roller, a membrane winding portion and a membrane winding portion, the first separation roller, the membrane winding portion and the membrane winding portion are arranged on the winding frame, the first separation roller can rotate relative to the winding machine, the first separation roller is used to support the fabric, the fabric winding portion is used to wind the membrane body in the membrane, and the membrane winding portion is used to wind the membrane in the membrane.

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