Composite diaphragm preparation equipment

Abstract

The embodiment of the utility model provides composite diaphragm preparation equipment. The composite diaphragm preparation equipment comprises a discharging roller, a winding roller, a hot roller set, a coating device, a pre-evaporation tank and a phase inversion tank, the discharging roller is used for rotationally releasing a supporting body, and the winding roller is used for rotationally winding the supporting body released by the discharging roller; the hot roller set, the coating device, the pre-evaporation tank and the phase inversion tank are sequentially arranged between the discharging roller and the winding roller in the moving direction of the supporting body from the discharging roller to the winding roller, the hot roller set is used for hot rolling of the supporting body, the coating device is used for coating the supporting body subjected to hot rolling with slurry, and the pre-evaporation tank is used for pre-evaporation treatment of the supporting body coated with the slurry. And the phase inversion tank is used for performing phase inversion on the pre-evaporated support body. The composite diaphragm prepared by the composite diaphragm preparation equipment disclosed by the embodiment of the utility model is high in yield.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm preparation, specifically to a composite diaphragm preparation device. Background Technology

[0002] In the process of producing hydrogen through alkaline water electrolysis, a composite membrane is required. The composite membrane is composed of hydrophilic nanoparticles, polymers, and a support. The support is located in the middle of the composite membrane cross-section. However, when preparing thinner composite membranes, the flatness of the support is poor, causing part of the support to be exposed on the surface of the composite membrane. This results in increased surface resistivity and poor gas barrier properties of the composite membrane, leading to defective products. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose a composite membrane preparation device.

[0005] The composite membrane preparation equipment of this utility model embodiment includes:

[0006] The system comprises a feeding roller, a take-up roller, a hot rolling roller assembly, a coating device, a pre-evaporation tank, and a phase transformation tank. The feeding roller is used to rotate and release the support body, and the take-up roller is used to rotate and rewind the support body released by the feeding roller. The hot rolling roller assembly, the coating device, the pre-evaporation tank, and the phase transformation tank are sequentially arranged between the feeding roller and the take-up roller along the moving direction of the support body from the feeding roller to the take-up roller. The hot rolling roller assembly is used to hot roll the support body, the coating device is used to apply a slurry to the hot-rolled support body, the pre-evaporation tank is used to pre-evaporate the support body after applying the slurry, and the phase transformation tank is used to perform a phase transformation on the pre-evaporated support body.

[0007] The composite diaphragm preparation equipment of this utility model embodiment involves a support body released by a feeding roller being sequentially hot-rolled by a hot rolling roller group, coated with slurry by a coating device, pre-evaporated in a pre-evaporation tank, and phase-conversion in a phase-conversion tank to form a composite diaphragm, which is then wound up by a winding roller. In the formed composite diaphragm, the support body is ensured to be located at the center of the composite diaphragm. Therefore, the composite diaphragm preparation equipment of this utility model embodiment produces a high yield of composite diaphragms.

[0008] In some embodiments, the hot rolling roll group includes a first hot rolling roll and a second hot rolling roll, the central axis of the first hot rolling roll is parallel to the central axis of the second hot rolling roll, and the rotation direction of the first hot rolling roll is opposite to the rotation direction of the second hot rolling roll. Along the radial direction of the first hot rolling roll, the first hot rolling roll and the second hot rolling roll are arranged at intervals for the support body to pass through, and the support body abuts against the outer peripheral surface of the first hot rolling roll and the outer peripheral surface of the second hot rolling roll.

[0009] In some embodiments, the first hot rolling roll and the second hot rolling roll may be relatively close to each other and relatively far apart.

[0010] In some embodiments, the outer peripheral surface of the first hot rolling roll abuts against the support body and changes the moving direction of the support body; the outer peripheral surface of the second hot rolling roll abuts against the portion of the support body on the outer peripheral surface of the first hot rolling roll where the moving direction is changed; or, the outer peripheral surface of the second hot rolling roll abuts against the upstream portion of the portion of the support body on the outer peripheral surface of the first hot rolling roll where the moving direction is changed; or the outer peripheral surface of the second hot rolling roll abuts against the downstream portion of the portion of the support body on the outer peripheral surface of the first hot rolling roll where the moving direction is changed.

[0011] In some embodiments, the composite membrane preparation equipment further includes a first stretching roller, which is located between the hot rolling roller group and the coating device. The first stretching roller is used to abut against the hot-rolled support and change the moving direction of the support, so that the hot-rolled support moves toward the coating device.

[0012] In some embodiments, the composite diaphragm preparation equipment further includes a preheating roller, which is disposed between the feeding roller and the hot rolling roller group, and is used to abut against and preheat the support.

[0013] In some embodiments, the hot rolling roll group includes a first hot rolling roll and a second hot rolling roll, and the preheating roll, the first hot rolling roll and the second hot rolling roll are all provided with heaters or heating chambers, and the heating chambers are used for heating the flow of the heating medium.

[0014] In some embodiments, the coating apparatus includes a double-sided coating head through which the support passes.

[0015] In some embodiments, the composite membrane preparation apparatus further includes a second stretching roller and a third stretching roller. The interior of the phase conversion tank is used to set a phase conversion medium. The second stretching roller and the third stretching roller are both disposed in the phase conversion tank and located below the liquid surface of the phase conversion medium. The second stretching roller is used to abut against the support body entering the phase conversion tank from the pre-evaporation tank and move the support body toward the third stretching roller. The third stretching roller is used to abut against the support body and move the support body toward the outside of the phase conversion tank.

[0016] In some embodiments, the composite membrane preparation apparatus further includes a fourth stretching roller, which is located between the phase conversion groove and the take-up roller. The fourth stretching roller is used to abut against the phase conversion treated support and change the moving direction of the support, so that the phase conversion treated support moves toward the take-up roller. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the composite membrane preparation equipment according to the first embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the composite membrane preparation equipment according to the second embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the composite membrane preparation equipment according to the third embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the composite membrane preparation equipment according to the fourth embodiment of this utility model;

[0021] Figure 5 This is a schematic diagram of the composite membrane preparation equipment according to the fifth embodiment of this utility model.

[0022] Figure label:

[0023] 1. Feeding roll; 2. Rewinding roll; 3. Hot rolling roll assembly; 31. First hot rolling roll; 32. Second hot rolling roll; 4. Coating device; 5. Pre-evaporation tank; 6. Phase inversion tank; 7. Support body; 8. First stretching roll; 9. Preheating roll; 10. Second stretching roll; 11. Third stretching roll; 12. Fourth stretching roll. Detailed Implementation

[0024] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] The following is for reference. Figures 1-5A composite membrane preparation apparatus according to an embodiment of the present invention is described.

[0026] like Figures 1-5 As shown, the composite membrane preparation equipment of this utility model embodiment includes a feeding roller 1, a winding roller 2, a hot rolling roller group 3, a coating device 4, a pre-evaporation tank 5, and a phase inversion tank 6.

[0027] The feed roller 1 is used to rotate and release the support body 7. For example, as... Figure 1 As shown, the support body 7 is wound around the outer periphery of the feeding roller 1, and the feeding roller 1 is along the... Figure 1 Rotate clockwise as shown to release support 7.

[0028] The take-up roller 2 is used to rotate the take-up unwind roller 1 to release the support body 7. For example, as... Figure 1 As shown, the take-up roller 2 along the... Figure 1 The support body 7, released by the unloading roller 1, is rotated clockwise to be wound around the outer periphery of the winding roller 2. Driven by the unloading roller 1 and the winding roller 2, the travel speed of the support body 7 is preferably, but not limited to, 0.5 m / min.

[0029] The hot rolling mill roll assembly 3, coating device 4, pre-evaporation tank 5, and phase inversion tank 6 are sequentially arranged between the feed roller 1 and the take-up roller 2 along the moving direction of the support body 7 from the feed roller 1 to the take-up roller 2. In other words, the support body 7 passes through the hot rolling mill roll assembly 3, coating device 4, pre-evaporation tank 5, and phase inversion tank 6 sequentially during its movement from the feed roller 1 to the take-up roller 2. It should be noted that the hot rolling mill roll assembly 3, coating device 4, pre-evaporation tank 5, and phase inversion tank 6 are preferably, but not limited to, located between the installation positions of the feed roller 1 and the take-up roller 2.

[0030] The hot rolling roll group 3 is used for hot rolling the support body 7, the coating device 4 is used for coating the hot-rolled support body 7 with slurry, the pre-evaporation tank 5 is used for pre-evaporation treatment of the support body 7 after coating with slurry, and the phase transformation tank 6 is used for phase transformation of the support body 7 after pre-evaporation treatment.

[0031] The composite diaphragm preparation equipment of this utility model embodiment involves a support body released by a feeding roller being sequentially hot-rolled by a hot rolling roller group, coated with slurry by a coating device, pre-evaporated in a pre-evaporation tank, and phase-conversion in a phase-conversion tank to form a composite diaphragm, which is then wound up by a winding roller. In the formed composite diaphragm, the support body is ensured to be located at the center of the composite diaphragm. Therefore, the composite diaphragm preparation equipment of this utility model embodiment produces a high yield of composite diaphragms.

[0032] In some embodiments, the hot rolling roll group 3 includes a first hot rolling roll 31 and a second hot rolling roll 32. The central axis of the first hot rolling roll 31 is parallel to the central axis of the second hot rolling roll 32, and the rotation direction of the first hot rolling roll 31 is opposite to the rotation direction of the second hot rolling roll 32. Along the radial direction of the first hot rolling roll 31, the first hot rolling roll 31 and the second hot rolling roll 32 are arranged at intervals for the support body 7 to pass through, and the support body 7 abuts against the outer peripheral surface of the first hot rolling roll 31 and the outer peripheral surface of the second hot rolling roll 32.

[0033] like Figures 1-5 As shown, the hot rolling roll group 3 includes a first hot rolling roll 31 and a second hot rolling roll 32. The central axes of the first hot rolling roll 31 and the second hot rolling roll 32 are parallel and arranged radially at intervals. The space between the first hot rolling roll 31 and the second hot rolling roll 32 is used for the passage of a support body 7. One end face of the support body 7 abuts against the outer peripheral surface of the first hot rolling roll 31, and the other end face of the support body 7 abuts against the outer peripheral surface of the second hot rolling roll 32. The first hot rolling roll 31 is arranged radially at intervals. Figure 1 As shown, the second hot rolling roll 32 rotates clockwise, along... Figure 1 The rotation speed of the first hot rolling roll 31 and the second hot rolling roll 32, which rotate counterclockwise as shown, is preferably, but not limited to, 0.01 r / min to 200 r / min.

[0034] Pressure is applied to the support body 7 by the first hot rolling roll 31 and the second hot rolling roll 32 and hot rolling is performed to make the support body 7 flat, thereby ensuring that the support body is located in the center of the composite diaphragm.

[0035] It is understood that in some embodiments, the first hot rolling roll and the second hot rolling roll may also remain stationary and not rotate.

[0036] In some embodiments, the interior of both the first hot rolling roll 31 and the second hot rolling roll 32 is provided with a heater or heating chamber, and the heating chamber is used to heat the flow of the heating medium.

[0037] Specifically, heaters can be installed inside the first hot rolling roll 31 and the second hot rolling roll 32. The heaters are preferably, but not limited to, electromagnetic heaters, resistance wires, etc. The first hot rolling roll 31 and the second hot rolling roll 32 are heated by the heaters, so that the first hot rolling roll 31 and the second hot rolling roll 32 hot roll the support body 7.

[0038] Heating chambers may also be provided inside the first hot rolling roll 31 and the second hot rolling roll 32. The heating chambers are used for the flow of heating medium. The heating medium is preferably, but not limited to, water, heated oil, etc. The first hot rolling roll 31 and the second hot rolling roll 32 are heated by the heating medium, so that the first hot rolling roll 31 and the second hot rolling roll 32 hot roll the support 7.

[0039] The temperatures of the first hot rolling roll 31 and the second hot rolling roll 32 are preferably, but not limited to, 30°C to 150°C.

[0040] The first hot rolling roll 31 and the second hot rolling roll 32 are preferably, but not limited to, made of materials such as stainless steel, copper, plastic and ceramic, and more preferably made of stainless steel.

[0041] In some embodiments, the first hot rolling roll 31 and the second hot rolling roll 32 may be relatively close to each other and relatively far apart. In other words, the distance between the first hot rolling roll 31 and the second hot rolling roll 32 is adjustable.

[0042] Preferably, the first hot rolling roll 31 and the second hot rolling roll 32 are mounted on the frame, and the mounting positions of the first hot rolling roll 31 and / or the second hot rolling roll 32 on the frame are adjustable. This allows the spacing between the first hot rolling roll 31 and the second hot rolling roll 32 to be changed by adjusting their mounting positions, thus adapting to supports 7 of different thicknesses and applying different pressures to the support 7. The spacing between the first hot rolling roll 31 and the second hot rolling roll 32 is preferably, but not limited to, 20µm to 400µm.

[0043] In some embodiments, the outer peripheral surface of the first hot rolling roll 31 abuts against the support body 7 and changes the moving direction of the support body 7. The outer peripheral surface of the second hot rolling roll 32 abuts against the portion of the support body 7 on the outer peripheral surface of the first hot rolling roll 31 where the moving direction has changed. Alternatively, the outer peripheral surface of the second hot rolling roll 32 abuts against the upstream portion of the portion of the support body 7 on the outer peripheral surface of the first hot rolling roll 31 where the moving direction has changed. Or, the outer peripheral surface of the second hot rolling roll 32 abuts against the downstream portion of the portion of the support body 7 on the outer peripheral surface of the first hot rolling roll 31 where the moving direction has changed.

[0044] like Figures 1-3 As shown, the support body 7 is released by the feed roller 1 and moves in the horizontal direction, then abuts against the outer peripheral surface of the first hot rolling roller 31 and bends along the outer peripheral surface of the first hot rolling roller 31 to change the moving direction of the support body 7, so that the support body 7 moves in the vertical direction.

[0045] In such Figure 1 In the example shown, the outer peripheral surface of the second hot rolling roll 32 abuts against the downstream portion of the support 7 on the outer peripheral surface of the first hot rolling roll 31 where its direction of movement changes. In other words, the support 7 first bends along the outer peripheral surface of the first hot rolling roll 31 and then abuts between the first hot rolling roll 31 and the second hot rolling roll 32. In other words, the portion of the support 7 that abuts between the first hot rolling roll 31 and the second hot rolling roll 32 is located downstream of the portion of the support 7 that bends along the outer peripheral surface of the first hot rolling roll 31.

[0046] In such Figure 2In the example shown, the outer peripheral surface of the second hot rolling roll 32 abuts against the portion of the support 7 on the outer peripheral surface of the first hot rolling roll 31 that changes direction of movement. In other words, the support 7 abuts between the first hot rolling roll 31 and the second hot rolling roll 32 while bending along the outer peripheral surface of the first hot rolling roll 31. In other words, the portion of the support 7 that bends along the outer peripheral surface of the first hot rolling roll 31 abuts between the first hot rolling roll 31 and the second hot rolling roll 32.

[0047] In such Figure 3 In the example shown, the outer peripheral surface of the second hot rolling roll 32 abuts against the upstream portion of the support 7 on the outer peripheral surface of the first hot rolling roll 31 where its direction of movement changes. In other words, the support 7 first abuts between the first hot rolling roll 31 and the second hot rolling roll 32, and then bends along the outer peripheral surface of the first hot rolling roll 31. In other words, the portion of the support 7 that abuts between the first hot rolling roll 31 and the second hot rolling roll 32 is located upstream of the portion of the support 7 that bends along the outer peripheral surface of the first hot rolling roll 31.

[0048] It is understandable that the first hot rolling roll is not limited to changing the direction of movement of the support body, such as... Figure 4 and Figure 5 In the example shown, the composite membrane preparation equipment of this utility model embodiment further includes a first stretching roller 8, which is located between the hot rolling roller group 3 and the coating device 4. The first stretching roller 8 is used to abut against the hot-rolled support body 7 and change the moving direction of the support body 7, so that the hot-rolled support body 7 moves toward the coating device 4.

[0049] like Figure 4 and Figure 5 As shown, a first stretching roller 8 is provided between the first hot rolling roller 31 and the second hot rolling roller 32 and the coating device 4. The support body 7 is released by the feeding roller 1 and moves in the horizontal direction. Then it passes between the first hot rolling roller 31 and the second hot rolling roller 32, and then abuts against the outer peripheral surface of the first stretching roller 8 and bends along the outer peripheral surface of the first stretching roller 8 to change the moving direction of the support body 7, so that the support body 7 moves in the vertical direction.

[0050] In some embodiments, the composite diaphragm preparation equipment of this utility model further includes a preheating roller 9, which is disposed between the feeding roller 1 and the hot rolling roller group 3, and is used to abut against and preheat the support body 7.

[0051] like Figure 5As shown, a preheating roller 9 is provided between the first hot rolling roll 31 and the second hot rolling roll 32 and the unloading roll 1. The support body 7 is released from the unloading roll 1 and moves upward in a horizontal direction, then abuts against the outer peripheral surface of the preheating roller 9 to be preheated by the preheating roller 9. At the same time, the support body 7 also bends along the outer peripheral surface of the preheating roller 9 to change the direction of movement of the support body 7, so that the support body 7 moves in a horizontal direction and passes between the first hot rolling roll 31 and the second hot rolling roll 32.

[0052] The preheating roller 9 preheats the support body 7 before the hot rolling roller group 3 to improve the leveling effect of the support body 7, thereby ensuring that the support body is located in the center of the composite diaphragm.

[0053] In some embodiments, the preheating roller 9 is provided with a heater or heating chamber inside, the heating chamber being used to heat the flow of the medium.

[0054] Specifically, a heater can be installed inside the preheating roller 9. The heater is preferably, but not limited to, an electromagnetic heater, a resistance wire, etc. The preheating roller 9 is heated by the heater, thereby preheating the support body 7.

[0055] The preheating roller 9 can also be provided with a heating chamber, which is used for the flow of a heating medium. The heating medium is preferably, but not limited to, water, heated oil, etc. The preheating roller 9 is heated by the heating medium, thereby preheating the support body 7.

[0056] The temperature of the preheating roller 9 is preferably, but not limited to, 30°C to 150°C.

[0057] The preheating roller 9 is preferably, but not limited to, made of stainless steel, copper, plastic and ceramic, and more preferably of stainless steel.

[0058] In some embodiments, the coating apparatus 4 includes a double-sided coating head, through which the support 7 passes.

[0059] like Figures 1-5 As shown, the coating apparatus 4 includes a double-sided coating head, through which a support 7 passes. In other words, the coating apparatus 4 includes a first coating head and a second coating head disposed opposite to each other, with the support 7 passing between the first coating head and the second coating head.

[0060] The direction in which the support 7 passes between the first coating head and the second coating head is preferably, but not limited to, orthogonal to the relative arrangement direction of the first coating head and the second coating head, for example, as... Figure 1 As shown, the first coating head and the second coating head are arranged opposite each other in the horizontal direction, and the support body 7 passes between the first coating head and the second coating head from top to bottom.

[0061] The slurry is applied to both ends of the support 7 simultaneously using a double-sided coating head to ensure uniform slurry application on both ends of the support 7. The slurry used is preferably, but not limited to, a casting slurry.

[0062] In some embodiments, the pre-evaporation tank 5 is equipped with a temperature control component and a humidity control component to pre-evaporate the coated support 7.

[0063] In some embodiments, the composite membrane preparation equipment of this utility model further includes a second stretching roller 10 and a third stretching roller 11. The interior of the phase conversion tank 6 is used to set the phase conversion medium. The second stretching roller 10 and the third stretching roller 11 are both disposed in the phase conversion tank 6 and located below the liquid surface of the phase conversion medium. The second stretching roller 10 is used to abut against the support body 7 that enters the phase conversion tank 6 from the pre-evaporation tank 5 and move the support body 7 toward the third stretching roller 11. The third stretching roller 11 is used to abut against the support body 7 and move the support body 7 toward the outside of the phase conversion tank 6.

[0064] like Figures 1-5 As shown, the phase conversion tank 6 is used to contain the phase conversion medium. The phase conversion tank 6 is provided with a second stretching roller 10 and a third stretching roller 11 arranged at intervals in the horizontal direction, and both the second stretching roller 10 and the third stretching roller 11 are located below the liquid surface of the phase conversion medium.

[0065] After hot rolling, the support body 7 passes through the coating device 4 and the pre-evaporation tank 5 from top to bottom, and then enters the phase conversion medium in the phase conversion tank 6. It then abuts against the outer peripheral surface of the second stretching roller 10 and bends along the outer peripheral surface of the second stretching roller 10, so that the support body 7 moves horizontally toward the third stretching roller 11. The support body 7 continues to abut against the outer peripheral surface of the third stretching roller 11 and bends along the outer peripheral surface of the third stretching roller 11, so that the support body 7 moves vertically and extends out of the phase conversion medium and the phase conversion tank 6.

[0066] The second stretching roller 10 facilitates the entry of the support body 7 into the phase conversion medium. The angle at which the support body 7 enters the phase conversion medium can be controlled by the installation position of the second stretching roller 10. The third stretching roller 11 facilitates the extension of the support body 7 from the phase conversion medium. The angle at which the support body 7 extends from the phase conversion medium can be controlled by the installation position of the third stretching roller 11. The immersion time of the support body 7 in the phase conversion medium can be controlled by the distance between the third stretching roller 11 and the second stretching roller 10 to ensure the effectiveness of the phase conversion.

[0067] Preferably, the phase conversion tank 6 is equipped with a temperature control component to control the temperature of the phase conversion medium, so as to ensure the phase conversion effect.

[0068] In some embodiments of the present invention, the composite diaphragm preparation equipment further includes a fourth stretching roller 12, which is located between the phase conversion groove 6 and the winding roller 2. The fourth stretching roller 12 is used to abut against the phase conversion treated support 7 and change the moving direction of the support 7, so that the phase conversion treated support 7 moves toward the winding roller 2.

[0069] like Figures 1-5 As shown, a fourth stretching roller 12 is provided between the phase conversion groove 6 and the take-up roller 2. The support body 7 extending from the phase conversion groove 6 has formed a composite diaphragm. After the phase conversion, the support body 7 abuts against the outer peripheral surface of the fourth stretching roller 12 and bends along the outer peripheral surface of the fourth stretching roller 12, so that the support body 7 after the phase conversion moves towards the take-up roller 2 in the horizontal direction.

[0070] The winding angle and winding direction of the composite diaphragm are controlled by the installation position of the fourth stretch roller 12 to ensure the winding effect of the composite diaphragm.

[0071] It should be noted that the support 7 is preferably, but not limited to, a polymer fabric such as polyethylene mesh, polypropylene mesh, polyphenylene sulfide mesh, polytetrafluoroethylene mesh, and polyurethane mesh, with a mesh count of 20 to 100 mesh and a thickness of 30 μm to 300 μm.

[0072] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0073] Furthermore, the terms "first" and "second" are used only for distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0075] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0076] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A composite membrane preparation device, characterized in that, include: The assembly includes a feeding roller (1), a take-up roller (2), a hot rolling roller assembly (3), a coating device (4), a pre-evaporation tank (5), and a phase conversion tank (6). The feeding roller (1) is used to rotate and release the support body (7). The take-up roller (2) is used to rotate and rewind the support body (7) released by the feeding roller (1). The hot rolling roller assembly (3), the coating device (4), the pre-evaporation tank (5), and the phase conversion tank (6) are arranged sequentially between the feeding roller (1) and the take-up roller (2) along the moving direction of the support body (7) from the feeding roller (1) to the take-up roller (2). The hot rolling roller assembly (3) is used to hot roll the support body (7). The coating device (4) is used to coat the hot-rolled support body (7) with slurry. The pre-evaporation tank (5) is used to pre-evaporate the support body (7) after coating with slurry. The phase conversion tank (6) is used to perform phase conversion on the support body (7) after pre-evaporation treatment.

2. The composite diaphragm preparation equipment according to claim 1, characterized in that, The hot rolling roll group (3) includes a first hot rolling roll (31) and a second hot rolling roll (32). The central axis of the first hot rolling roll (31) is parallel to the central axis of the second hot rolling roll (32), and the rotation direction of the first hot rolling roll (31) is opposite to the rotation direction of the second hot rolling roll (32). Along the radial direction of the first hot rolling roll (31), the first hot rolling roll (31) and the second hot rolling roll (32) are arranged at intervals for the support body (7) to pass through, and the support body (7) abuts against the outer peripheral surface of the first hot rolling roll (31) and the outer peripheral surface of the second hot rolling roll (32).

3. The composite membrane preparation equipment according to claim 2, characterized in that, The first hot rolling roll (31) and the second hot rolling roll (32) may be relatively close to each other and relatively far apart.

4. The composite membrane preparation equipment according to claim 2, characterized in that, The outer peripheral surface of the first hot rolling roll (31) is used to abut against the support body (7) and change the moving direction of the support body (7). The outer peripheral surface of the second hot rolling roll (32) abuts against the portion of the support body (7) on the outer peripheral surface of the first hot rolling roll (31) where the moving direction is changed. Alternatively, the outer peripheral surface of the second hot rolling roll (32) abuts against the upstream portion of the portion of the support body (7) on the outer peripheral surface of the first hot rolling roll (31) where the moving direction is changed. Alternatively, the outer peripheral surface of the second hot rolling roll (32) abuts against the downstream portion of the portion of the support body (7) on the outer peripheral surface of the first hot rolling roll (31) where the moving direction is changed.

5. The composite membrane preparation equipment according to claim 1, characterized in that, It also includes a first stretching roller (8), which is located between the hot rolling roller group (3) and the coating device (4). The first stretching roller (8) is used to abut against the hot-rolled support (7) and change the moving direction of the support (7), so that the hot-rolled support (7) moves toward the coating device (4).

6. The composite membrane preparation equipment according to claim 1, characterized in that, It also includes a preheating roller (9), which is located between the feeding roller (1) and the hot rolling roller group (3) and is used to abut against and preheat the support body (7).

7. The composite membrane preparation equipment according to claim 6, characterized in that, The hot rolling roll group (3) includes a first hot rolling roll (31) and a second hot rolling roll (32). The preheating roll (9), the first hot rolling roll (31) and the second hot rolling roll (32) are all provided with heaters or heating chambers. The heating chambers are used to heat the flow of the heating medium.

8. The composite membrane preparation equipment according to claim 1, characterized in that, The coating device (4) includes a double-sided coating head, through which the support (7) passes.

9. The composite diaphragm preparation equipment according to claim 1, characterized in that, It also includes a second stretching roller (10) and a third stretching roller (11). The interior of the phase conversion tank (6) is used to set the phase conversion medium. The second stretching roller (10) and the third stretching roller (11) are both located in the phase conversion tank (6) and below the liquid surface of the phase conversion medium. The second stretching roller (10) is used to abut against the support body (7) that enters the phase conversion tank (6) from the pre-evaporation tank (5) and move the support body (7) toward the third stretching roller (11). The third stretching roller (11) is used to abut against the support body (7) and move the support body (7) toward the outside of the phase conversion tank (6).

10. The composite membrane preparation equipment according to claim 1, characterized in that, It also includes a fourth stretching roller (12), which is located between the phase conversion groove (6) and the take-up roller (2). The fourth stretching roller (12) is used to abut against the support body (7) after phase conversion treatment and change the moving direction of the support body (7) so that the support body (7) after phase conversion treatment moves toward the take-up roller (2).

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