Precise coating device for alkaline electrolytic water hydrogen production diaphragm

Abstract

The utility model belongs to the technical field of hydrogen energy, and particularly relates to an alkaline electrolytic water hydrogen production diaphragm precise coating device which comprises a mounting plate, a bottom plate is fixed on the mounting plate, an unwinding roller, a lower leveling roller, an upper leveling roller and a winding roller are rotatably arranged on the mounting plate, a coating box, an air thorn box and a drying box are fixed on the mounting plate, and the coating box is provided with a coating assembly. The mounting plate is provided with a getter pump, the air thorn box communicates with the getter pump through an air delivery pipe, the air delivery pipe communicates with an air injection plate, the air thorn box is provided with a through hole, and the drying box is provided with a drying assembly; air suction pressurization is carried out through the air suction pump, conveying is carried out through the air conveying pipe, and air is sprayed out from the air spraying plate, so that air puncture can be carried out on the passing diaphragm, and the permeability of the diaphragm is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen energy, and in particular relates to a precision coating device for a diaphragm for producing hydrogen through alkaline water electrolysis. Background Art

[0002] Alkaline water electrolysis is the most commonly used hydrogen production technology in industrialization. The principle of alkaline water electrolysis is that water is electrolyzed into hydrogen and oxygen, among which the diaphragm is one of the important components to isolate the generated hydrogen and oxygen to prevent mixing. Since alkaline water electrolysis uses alkaline electrolyte solutions such as sodium hydroxide (NaOH) and potassium hydroxide (KOH) as electrolytes, the diaphragm has high requirements for alkali resistance and high temperature resistance.

[0003] Currently, polyphenylene sulfide (PPS) is generally used as the preferred material for alkaline water electrolysis hydrogen production diaphragms. Due to the poor hydrophilicity of polyphenylene sulfide diaphragms, it is difficult to fully infiltrate the electrolyte when using the polyphenylene sulfide diaphragm, resulting in excessive internal resistance of the electrolytic cell and reduced electrolysis efficiency. In order to solve this technical problem, the hydrophilicity is currently mainly improved by coating an inorganic hydrophilic layer on the surface of the polyphenylene sulfide diaphragm.

[0004] The existing coating slurry with good hydrophilic properties is mainly composed of zirconium dioxide and film-forming materials. The hydrophilic coating formed by coating is a ceramic coating. However, due to the limitation of coating equipment, the coating precision of hydrogen production diaphragm is currently low, the coating is easy to fall off after coating, and there are problems such as short service life. The main reason is that conventional equipment coating forms a continuous coating film, which causes the micropores of the diaphragm to be blocked and affects the electrolyte permeation. For this reason, we proposed a precision coating device for alkaline water electrolysis hydrogen production diaphragm to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a precision coating device for alkaline water electrolysis hydrogen production diaphragm, which is used to solve the problems existing in the background technology.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0007] A precision coating device for alkaline water electrolysis hydrogen production diaphragm, comprising a mounting plate, a bottom plate is fixed at the lower end of the mounting plate, a reeling roller, a lower leveling roller, an upper leveling roller and a reeling roller are rotatably arranged at the lower side of the front end of the mounting plate, a coating box, an air piercing box and a drying box are fixed at the front end of the mounting plate, a coating component is arranged inside the coating box, an air piercing component is arranged inside the air piercing box, and a drying component is arranged inside the drying box;

[0008] The air thorn assembly includes an air jet plate, an air suction pump is installed at the rear end of the mounting plate, an air supply pipe is connected between the air thorn box and the air suction pump, the air jet plate is connected to one end of the air supply pipe extending into the air thorn box, through holes are opened at the upper and lower ends of the air thorn box, and the air jet plate is located on one side of the through hole.

[0009] Furthermore, the coating assembly includes two coating rollers, both of which are rotatably arranged inside the coating box, and a gap is left between the two coating rollers. A paint box is fixed to the rear end of the mounting plate, and a liquid pump is installed at the rear end of the mounting plate and is located directly above the paint box. The lower end of the liquid pump is connected to a liquid inlet pipe extending into the interior of the paint box, and the upper end of the liquid pump is provided with a liquid outlet pipe connected to the coating box.

[0010] Furthermore, vertical plates are symmetrically provided at the lower end of the coating box, triangular box scrapers are fixed at the lower ends of the two vertical plates, and the rear ends of the two triangular box scrapers are connected to drainage pipes, and the two drainage pipes pass through one end of the mounting plate and are suspended directly above the coating box.

[0011] Furthermore, the drying component includes an air jet rod, one end of the air piercing box facing the air jet plate is connected to an air duct, the air jet rod is installed on the upper side of the drying box, and one end of the air duct extending into the drying box is connected to the air jet rod.

[0012] Furthermore, the unwinding roller and the winding roller are each provided with a transmission wheel at one end passing through the mounting plate, a transmission belt is provided between the two transmission wheels, a servo motor is installed at the upper end of the base plate, and the output shaft of the servo motor is fixedly connected to the transmission wheel at the lower side.

[0013] Furthermore, interception blocks are provided at the front ends of the lower leveling roller and the upper leveling roller.

[0014] Furthermore, a guide plate is fixed to the lower end of the air piercing box.

[0015] Furthermore, a filter cover is threadedly connected to the air inlet of the air pump.

[0016] The beneficial effects of the utility model are:

[0017] 1) The air outside is absorbed by the suction pump, and the inhaled air is pressurized. The pressurized air is ejected from the jet plate through the air pipe, thereby puncturing the diaphragm passing through the through hole to prevent the diaphragm from being blocked after coating, thereby affecting the use of the diaphragm.

[0018] 2) The two sides of the diaphragm can be coated simultaneously by two coating rollers, and the coating roller on one side can also change the traveling direction of the diaphragm, which is convenient for subsequent processing of the diaphragm.

[0019] 3) The excess paint on the surface of the coated diaphragm can be scraped off by scraping with two triangular box scrapers. The excess paint will fall into the inside of the triangular box scraper. When the collected paint reaches a certain level, the paint will flow into the paint box through the drain pipe, thereby saving paint costs.

[0020] 4) After passing through the diaphragm, the gas ejected through the jet plate will be further guided to the inside of the drying box by the air guide pipe, and then sprayed to the surface of the diaphragm by the jet rod, so that the applied paint can be quickly air-dried.

[0021] 5) Through the interception of the interception block, the diaphragm can be restricted during the transportation of the diaphragm to prevent the diaphragm from escaping from the device and affecting the transportation of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the structure of a precision coating device for alkaline water electrolysis hydrogen production diaphragm of the utility model;

[0024] Figure 2 It is a partial cross-sectional structural schematic diagram of a precision coating device for alkaline water electrolysis hydrogen production diaphragm of the utility model;

[0025] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0026] Figure 4 This is a schematic diagram of the structure of a precision coating device for alkaline water electrolysis hydrogen production diaphragm in the utility model. Figure 2 .

[0027] The main component symbols are described as follows:

[0028] Mounting plate 100, bottom plate 101, unwinding roller 102, lower leveling roller 103, upper leveling roller 104, winding roller 105, coating box 106, air piercing box 107, drying box 108, jet plate 109, suction pump 110, air pipe 111, coating roller 200, coating box 201, liquid suction pump 202, liquid inlet pipe 203, liquid outlet pipe 204, vertical plate 300, triangular box scraper 301, liquid discharge pipe 302, jet rod 400, air guide pipe 401, transmission wheel 402, transmission belt 403, servo motor 404, interception block 405, guide plate 406, filter cover 407. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] Embodiment 1:

[0031] like Figure 1-Figure 4 As shown, a precision coating device for alkaline water electrolysis hydrogen production diaphragm includes a mounting plate 100, a bottom plate 101 is fixed at the lower end of the mounting plate 100, a discharge roller 102, a lower leveling roller 103, an upper leveling roller 104 and a winding roller 105 are rotatably provided at the lower side of the front end of the mounting plate 100, a coating box 106, an air piercing box 107 and a drying box 108 are fixed at the front end of the mounting plate 100, a coating component is provided inside the coating box 106, an air piercing component is provided inside the air piercing box 107, and a drying component is provided inside the drying box 108;

[0032] The air thorn assembly includes an air jet plate 109, an air pump 110 is installed at the rear end of the mounting plate 100, an air pipe 111 is connected between the air thorn box 107 and the air pump 110, the air jet plate 109 is connected to one end of the air pipe 111 extending into the air thorn box 107, through holes are opened at the upper and lower ends of the air thorn box 107, and the air jet plate 109 is located on one side of the through hole.

[0033] The mounting plate 100 can be used to mount other components on the coating device, and the bottom plate 101 is placed on the ground, so that the coating device can be more stable. The unwinding roller 102 can be used to mount the diaphragm roll and convey the diaphragm. The unwinding roller 102 and the lower smoothing roller 103 are in the same horizontal plane, and the upper smoothing roller 104 and the lower smoothing roller 103 are in the same vertical plane. In this way, after the diaphragm comes out, it will bypass the upper smoothing roller 104 and the lower smoothing roller 103 in turn. This can not only guide the diaphragm, but also tighten the diaphragm to ensure that the surface of the diaphragm is smoother and convenient for subsequent processing. The winding roller 105 can The membrane is rolled up, and then passes through the coating box 106, the air piercing box 107 and the drying box 108. The coating box 106 can coat the surface of the membrane, and the air piercing box 107 can pierce the surface of the membrane with gas, so as to ensure the permeability of the membrane. The drying box 108 can dry the punctured membrane surface, which can prevent the coating from falling off and affecting the use of the membrane. The suction pump 110 can inhale external air and pressurize the inhaled air, so that it can be transported through the air pipe 111 and sprayed from the jet plate 109, thereby puncturing the membrane and preventing the membrane coating from being blocked;

[0034] When the membrane passes through the through hole on the air piercing box 107, the air suction pump 110 is started, the air suction pump 110 sucks in the outside air and pressurizes it, and then transmits it to the inside of the air piercing box 107 through the air delivery pipe 111, and finally the pressurized air is quickly ejected from the jet plate 109 to perform gas puncture on the coated membrane, so as to prevent the membrane from being blocked during coating;

[0035] In this embodiment, the air is pressurized by the air suction pump 110, transported by the air delivery pipe 111, and ejected from the air injection plate 109, so that the gas can puncture the passing diaphragm, thereby ensuring the permeability of the diaphragm.

[0036] Embodiment 2:

[0037] Based on the first embodiment, other components of the coating device are further described. Figure 2-Figure 4 As shown, the coating assembly includes two coating rollers 200, and the two coating rollers 200 are both rotatably arranged inside the coating box 106, and a gap is left between the two coating rollers 200. A paint box 201 is fixed to the rear end of the mounting plate 100, and a liquid pump 202 is installed at the rear end of the mounting plate 100 and is located directly above the paint box 201. The lower end of the liquid pump 202 is connected to a liquid inlet pipe 203 extending into the interior of the paint box 201, and the upper end of the liquid pump 202 is provided with a liquid outlet pipe 204 connected to the coating box 106.

[0038] Vertical plates 300 are symmetrically provided at the lower end of the coating box 106. Triangular box scrapers 301 are fixed at the lower ends of the two vertical plates 300. The rear ends of the two triangular box scrapers 301 are connected to drainage pipes 302, and the two drainage pipes 302 pass through one end of the mounting plate 100 and are suspended directly above the coating box 106.

[0039] The drying assembly includes an air jet rod 400. One end of the air box 107 facing the air jet plate 109 is connected to an air guide tube 401. The air jet rod 400 is installed on the upper side of the drying box 108. One end of the air guide tube 401 extending into the drying box 108 is connected to the air jet rod 400.

[0040] The unwinding roller 102 and the winding roller 105 are both provided with a transmission wheel 402 at one end passing through the mounting plate 100, and a transmission belt 403 is provided between the two transmission wheels 402. A servo motor 404 is installed at the upper end of the bottom plate 101, and the output shaft of the servo motor 404 is fixedly connected to the transmission wheel 402 at the lower side.

[0041] The front ends of the lower leveling roller 103 and the upper leveling roller 104 are both provided with interception blocks 405 .

[0042] A guide plate 406 is fixed to the lower end of the air piercing box 107 .

[0043] A filter cover 407 is threadedly connected to the air inlet of the air pump 110 .

[0044] In this embodiment, the coating box 201 stores coatings inside. By starting the liquid pump 202, the coating liquid is discharged into the coating box 106 through the liquid inlet pipe 203 and the liquid outlet pipe 204. The coating box 106 and the upper leveling roller 104 are located at the same horizontal plane, and there are two coating rollers 200 rotating inside the coating box 106. The coating rollers 200 can not only guide the diaphragm, but also coat both sides of the diaphragm. After the diaphragm passes through the lower end of the coating box 106, the triangular box scraper 301 will scrape both sides of the diaphragm, collect the coating on the surface of the diaphragm inside the triangular box scraper 301, and discharge it into the coating box 201 through the liquid discharge pipe 302, saving coatings and reducing coating costs.

[0045] When entering the drying box 108, the gas ejected from the air piercing box 107 will continue to flow through the air guide pipe 401 into the drying box 108 after passing through the diaphragm, and then be ejected by the air jet rod 400 to air-dry the coating of the diaphragm, thereby preventing the diaphragm coating from falling off and affecting the use of the diaphragm;

[0046] The servo motor 404 is started, and the output shaft of the servo motor 404 drives the lower transmission wheel 402 to rotate, and also drives the unwinding roller 102 to rotate, and then the power is transmitted by the transmission belt 403, and the other transmission wheel 402 and the winding roller 105 also rotate synchronously;

[0047] During the process of conveying the diaphragm, the interception block 405 can intercept and restrict the conveyed diaphragm, thereby preventing the diaphragm from being out of the conveying state;

[0048] When the air pump 110 is in use, the filter cover 407 can filter the inhaled air to prevent dust, impurities, etc. in the air from adhering to the surface of the diaphragm and affecting the quality of the diaphragm coating.

[0049] In the description of the present invention, it should be understood that the terms "lower end", "front side", "front end", "inside", "rear end", "one end", "upper and lower", "two ends", "one side", "lower end", "directly above", "upper end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "fixed", "rotated", "installed", "connected" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; 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, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0051] The above is only a preferred embodiment of the utility model. It should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. A precision coating device for alkaline water electrolysis hydrogen production diaphragm, comprising a mounting plate (100), characterized in that: A bottom plate (101) is fixed at the lower end of the mounting plate (100); a reeling roller (102), a lower leveling roller (103), an upper leveling roller (104) and a reeling roller (105) are rotatably provided at the lower front end of the mounting plate (100); a coating box (106), an air piercing box (107) and a drying box (108) are fixed at the front end of the mounting plate (100); a coating component is provided inside the coating box (106); an air piercing component is provided inside the air piercing box (107); and a drying component is provided inside the drying box (108); The air piercing assembly comprises an air jet plate (109), an air suction pump (110) is installed at the rear end of the mounting plate (100), an air supply pipe (111) is connected between the air piercing box (107) and the air suction pump (110), the air jet plate (109) is connected to one end of the air supply pipe (111) extending into the interior of the air piercing box (107), through holes are opened at the upper and lower ends of the air piercing box (107), and the air jet plate (109) is located on one side of the through hole.

2. The alkaline water electrolysis hydrogen production diaphragm precision coating device according to claim 1 is characterized by: The coating assembly comprises two coating rollers (200), both of which are rotatably arranged inside the coating box (106), and a gap is left between the two coating rollers (200); a coating box (201) is fixed to the rear end of the mounting plate (100); a liquid pump (202) is installed at the rear end of the mounting plate (100) and is located directly above the coating box (201); the lower end of the liquid pump (202) is connected to a liquid inlet pipe (203) extending into the interior of the coating box (201); and the upper end of the liquid pump (202) is provided with a liquid outlet pipe (204) connected to the coating box (106).

3. The alkaline water electrolysis hydrogen production diaphragm precision coating device according to claim 2 is characterized by: The coating box (106) is symmetrically provided with vertical plates (300) at the lower end, and triangular box scrapers (301) are fixed at the lower ends of the two vertical plates (300). The rear ends of the two triangular box scrapers (301) are connected to drainage pipes (302), and one end of the two drainage pipes (302) passes through the mounting plate (100) and is suspended directly above the coating box (106).

4. The alkaline water electrolysis hydrogen production diaphragm precision coating device according to claim 1 is characterized by: The drying assembly includes an air jet rod (400), one end of the air piercing box (107) facing the air jet plate (109) is connected to an air guide tube (401), the air jet rod (400) is installed on the upper side of the drying box (108), and one end of the air guide tube (401) extending into the drying box (108) is connected to the air jet rod (400).

5. The alkaline water electrolysis hydrogen production diaphragm precision coating device according to claim 1 is characterized by: The unwinding roller (102) and the winding roller (105) are each provided with a transmission wheel (402) at one end passing through the mounting plate (100), a transmission belt (403) is provided between the two transmission wheels (402), a servo motor (404) is installed at the upper end of the base plate (101), and an output shaft of the servo motor (404) is fixedly connected to the transmission wheel (402) at the lower side.

6. The alkaline water electrolysis hydrogen production diaphragm precision coating device according to claim 1 is characterized by: The front ends of the lower leveling roller (103) and the upper leveling roller (104) are both provided with intercepting blocks (405).

7. The alkaline water electrolysis hydrogen production diaphragm precision coating device according to claim 1 is characterized by: A guide plate (406) is fixed to the lower end of the air piercing box (107).

8. The alkaline water electrolysis hydrogen production diaphragm precision coating device according to claim 1 is characterized by: A filter cover (407) is threadedly connected to the air intake port of the air intake pump (110).

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