Method for efficiently and safely assembling an alkaline electrolyzer

Abstract

The application provides a method for efficiently and safely assembling an alkaline electrolytic cell, which comprises the following steps: sequentially mounting a right end pressing plate, a right end polar plate, a bipolar plate, a left end polar plate, a left end pressing plate and a tensioning bolt, and then sequentially performing cold pre-tightening, hoisting and laying, hot re-tightening and cold final tightening to complete the assembly of the alkaline electrolytic cell; wherein an engaging auxiliary device is used when the right end polar plate is mounted; a position difference adjusting device is used when the left end pressing plate is mounted; and a falling prevention device is used when hoisting. The method adopts corresponding devices at the nodes related to key components which are difficult to position and have high safety risks, and realizes efficient and safe assembly of the alkaline electrolytic cell.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of green energy hydrogen production technology, and particularly relates to a method for efficiently and safely assembling an alkaline electrolytic cell. BACKGROUND

[0002] The alkaline electrolytic cell is a device for converting electrical energy into hydrogen energy by decomposing water with alkaline liquid as medium. The specific working principle is that water is decomposed into hydrogen and oxygen through an electrochemical process under the action of direct current in an alkaline electrolyte environment. The electrolyte is generally a 30% mass concentration KOH solution or a 26% mass concentration NaOH solution. In this process, water is decomposed into hydrogen and oxygen through an electrochemical process under the action of direct current. The main components of the alkaline electrolytic cell include the right end plate, the right end plate, the bipolar plate, the left end plate, the left end plate, the electrode, the diaphragm, and the tensioning bolt and nut auxiliary accessories. The conventional stacking sequence of the alkaline electrolytic cell body and the assembly sequence of the auxiliary accessories are mainly performed according to the following flow sequence.

[0003] Install the right end plate → install the right end plate → install multiple bipolar plates → install the left end plate → install the left end plate → install the tensioning bolt → cold pre-tightening → hoisting and laying → hot re-tightening → cold final tightening.

[0004] To ensure the safe and stable operation of the electrolytic cell, the hole alignment accuracy of the flow channel between the end plate, the end plate, and the bipolar plate and other components during the assembly process of the electrolytic cell body is extremely important. In the conventional electrolytic cell assembly process, manual positioning and assembly are mainly relied on with the aid of hoisting equipment for visual inspection, especially in the assembly of the right end plate, the left end plate, and hoisting, etc. Even experienced assembly personnel often need to repeatedly correct and position multiple times, and in the correction process, the collision between the components of the cell body or with the assembly personnel is easy to occur, thus the assembly efficiency is low and the safety risk is extremely high. Therefore, how to efficiently and safely assemble during the assembly process has become a problem to be solved.

[0005] CN220388592U discloses an electrolytic cell assembly device, comprising a base, a support assembly and a plurality of limiting pieces, the support assembly is installed on the base for supporting the end pressure plate of the electrolytic cell to be assembled, a plurality of limiting pieces are installed on the side of the support assembly away from the base, a plurality of limiting pieces are provided on the end pressure plate to limit the end pressure plate, and the side of each limiting piece away from the support assembly is provided with an inclined guide surface. The electrolytic cell assembly device is provided with an inclined guide surface on the side of each limiting piece away from the support assembly to provide a guiding effect when the end pressure plate is installed on the limiting piece. However, the limiting piece is vertically inserted on the end pressure plate in the whole electrolytic cell assembly process, which not only does not have any beneficial effect on the positioning of the cathode and anode stack, but also seriously hinders the stacking assembly process of the cathode and anode plate, which is not worth the loss. Most importantly, when another end pressure plate is stacked, the limiting piece is first inserted into the limiting hole of the end pressure plate for limiting and then slowly falls on the last plate. During the process of lowering the end pressure plate to the aligned hole, it needs to be extremely horizontal, otherwise the end pressure plate and the limiting piece are easy to jam, and under the action of the self-weight of the end pressure plate, the limiting piece will be bent, and more seriously, the lower end pressure plate and the cathode and anode plate will be displaced, resulting in the failure of the whole electrolytic cell assembly, causing great safety risk and loss, which is counterproductive.

[0006] CN220074456U discloses a proton exchange membrane water electrolytic cell pneumatic clamp, comprising a bottom plate, a horizontal plate one is welded on the top outer wall of the bottom plate near one side position, a horizontal plate two is welded on the top outer wall of the bottom plate near the other side position, a gas cylinder is installed on the outer side wall of the horizontal plate two, a clamping plate is welded on one end of the gas cylinder, a limiting mechanism is arranged on the outer side wall of the horizontal plate one near the upper end position, a protection mechanism is arranged on the outer side wall of the horizontal plate one near the middle position, the limiting mechanism comprises a horizontal groove, the horizontal groove is provided in the outer side wall of the horizontal plate one, the limiting mechanism can further limit the position of the water electrolytic cell, avoid moving in the subsequent processing operation, affect the processing, cause the effect of the subsequent proton exchange membrane water electrolysis operation, and can well slow down the impact force of the water electrolytic cell, avoid the direct impact contact between the water electrolytic cell and the outer side wall of the horizontal plate one, and cause damage. The proton exchange membrane water electrolytic cell pneumatic clamp only limits the outer four sides of the cell body, and ensures that the electrolytic cell does not move during processing by the simple "four-side fixing method", which cannot have beneficial effects on the positioning of the holes, grooves and flow channels on the electrolytic cell plates, frames and the like.

[0007] CN221290415U discloses an electrolytic cell pole frame suction disc positioning clamp, the suction disc positioning clamp comprises: an electromagnetic suction disc; a plurality of radial guide rails connected on the surface of the electromagnetic suction disc and equidistantly distributed in a ring shape with the axis of the electromagnetic suction disc as the center; a supporting magnetic guide block and a positioning magnetic guide block are movably connected on each radial guide rail. The supporting magnetic guide block is used for supporting the pole frame workpiece, and the positioning magnetic guide block is used for positioning the inner circular surface of the pole frame workpiece. The electromagnetic suction disc is magnetized by power supply, and the magnetic attraction force is transmitted to the supporting magnetic guide block and the positioning magnetic guide block, so that the pole frame workpiece is magnetically attracted and fixed, the direction of the clamping force is from top to bottom, the annular pole frame workpiece bears the axial clamping force and will not be squeezed to deform, the precision of the pole frame workpiece is ensured, and the pole frame workpiece is convenient to install. However, the electrolytic cell pole frame suction disc positioning clamp is only used for hoisting operation in the production process of the electrolytic cell pole frame, and does not have beneficial effects on the assembly difficulty in the assembly process of the electrolytic cell.

[0008] In view of the low assembly efficiency and high safety risk of the electrolytic cell in the assembly process, it is of great significance to propose a method for efficiently and safely assembling an alkaline electrolytic cell. SUMMARY

[0009] In view of the problems in the prior art, the present application provides a method for efficiently and safely assembling an alkaline electrolytic cell, which uses meshing auxiliary devices, difference adjusting devices and anti-falling devices at key nodes such as installation of right end pole plate, left end pressing plate and hoisting, to ensure efficient and safe assembly of the alkaline electrolytic cell.

[0010] To achieve this purpose, the following technical solutions are adopted in the present application:

[0011] The present application provides a method for efficiently and safely assembling an alkaline electrolytic cell, which comprises sequentially installing right end pressing plate, right end pole plate, bipolar plate, left end pole plate, left end pressing plate and tensioning bolt, and then sequentially performing cold state pre-tightening, hoisting and laying, hot state re-tightening and cold state final tightening to complete the assembly of the alkaline electrolytic cell.

[0012] Among them, meshing auxiliary devices are used when installing the right end pole plate; difference adjusting devices are used when installing the left end pressing plate; and anti-falling devices are used when hoisting.

[0013] The method for efficiently and safely assembling an alkaline electrolytic cell according to the present application is simple to operate. On the basis of the existing assembly method of the alkaline electrolytic cell, corresponding installation components are used for key components and key assembly nodes, i.e. meshing auxiliary devices are used when installing the right end pole plate; difference adjusting devices are used when installing the left end pressing plate; and anti-falling devices are used when hoisting. This solves the assembly difficulty and safety risk at the key nodes, and avoids excessive interference with the conventional assembly method at most assembly nodes, thereby avoiding new assembly difficulties caused by new technologies.

[0014] Preferably, the engagement auxiliary device comprises a base plate and at least two positioning columns and at least two engagement bosses arranged on the base plate; the base plate is in the shape of a circular arc, and one side of the base plate is provided with an opening, the positioning columns are arranged on both sides of the opening, and at least two of the positioning columns are arranged on a first circular arc line parallel to the outer circular arc of the base plate, at least two of the engagement bosses are arranged on a second circular arc line parallel to the outer circular arc of the base plate, and the engagement bosses are arranged on the side of the opening pointing to the center of the circle. Preferably, the base plate of the present application is a POM plate, commonly known as a racing steel plate, which is obtained by extruding POM plastic particles through an extruder at high temperature, and then extruding through a corresponding die to obtain a plate of different thickness. It is a high-melting-point, high-crystallinity thermoplastic engineering plastic.

[0015] The right end pressing plate of the present application is provided with a bolt hole on the first circular arc line corresponding to the positioning column of the engagement auxiliary device, and a recess hole on the second circular arc line corresponding to the engagement boss of the engagement auxiliary device. The embedded engagement auxiliary device of the present application can be dynamically designed and produced according to the specific size of the bolt hole on the different right end pressing plate and the recess hole on the right end plate, and can match the assembly of the right end plate of different scale electrolytic cells.

[0016] Preferably, the number of positioning columns is 2.

[0017] Preferably, the number of engagement bosses is 2.

[0018] Preferably, the use method of the engagement auxiliary device comprises:

[0019] When the right end plate is hoisted to 3~10cm above the right end pressing plate, for example, it can be 3cm, 4cm, 5cm, 6cm, 7cm, 8cm or 10cm, etc.

[0020] Insert the two positioning columns into the two bolt holes on the 0° and 180° azimuth lines of the right end pressing plate respectively, take the two bolt holes as the positioning fulcrum, dynamically adjust the right end plate, embed the two engagement bosses into the recesses on the corresponding azimuth of the right end plate, and then lower the right end plate to the right end pressing plate to complete the installation of the right end plate.

[0021] Preferably, the differential adjustment device comprises, from bottom to top, a base, a ball, a sliding trolley and a soft pad. The base has a shape comprising a groove; the soft pad covers the upper surface and side surface of the sliding trolley; the ball is arranged on the base through a partition plate with an opening; the sliding trolley is arranged on the ball and moves with the rolling of the ball; the inner side of the periphery of the base is provided with an elastic member, and the elastic member is arranged on the upper part of the ball and has a gap distance with the ball. The diameter of the ball on the differential adjustment device is larger than the diameter of the opening on the partition plate, so that the ball can rotate without displacement. The elastic member can play a buffering role when the sliding trolley works, avoiding direct collision with the inner wall of the base and causing the base to fall off.

[0022] Preferably, the elastic member is a spring.

[0023] Preferably, the use method of the differential adjustment device comprises:

[0024] Four differential adjustment devices are evenly distributed at 90° above the left end plate, the left end pressing plate is hoisted and placed on the sliding trolley, the left end pressing plate is pushed to move in the radial and circumferential directions, all the tension bolts are symmetrically and sequentially inserted into the bolt holes of the left end pressing plate and immersed into the bolt holes of the right end pressing plate, and the positioning of the left end pressing plate is completed. Then the left end pressing plate is hoisted to be away from the surface of the sliding trolley, the differential adjustment device is removed, and then the left end pressing plate is placed down until it is placed above the left end plate, and the installation of the left end pressing plate is completed.

[0025] Preferably, the anti-falling device comprises a cylindrical ring rod, a vertical plate, two horizontal plates and a fixing member.

[0026] Preferably, the vertical plate and the fixing member are respectively arranged on the two sides of the two parallel horizontal plates, the two parallel horizontal plates have a first gap distance, and the vertical plate and the fixing member have a second gap distance, and the fixing member is used for fixedly connecting the two horizontal plates.

[0027] Preferably, the cylindrical ring rod is arranged on the vertical plate, away from the horizontal plate.

[0028] The cylindrical ring rod of the present application is a structure of a solid cylindrical half-arc shape, which is a conventional structure in the field.

[0029] The anti-falling device of the present application fixes the hoisting hole on the end pressing plate of the electrolytic cell through the vertical plate, the horizontal plate and the fixing member, and then the lifting rope is passed through the cylindrical ring rod for lifting, so that the square contact surface of the lifting rope is converted into a cylindrical contact surface, the shearing force of the lifting rope during lifting is reduced, and the purpose of enhancing the anti-falling is achieved.

[0030] Preferably, the use method of the anti-falling device comprises:

[0031] First, two transverse plates are used to clamp the end pressing plate where the hoisting hole of the electrolytic tank body is located, the hoisting rope is passed through the cylindrical ring rod for hoisting.

[0032] Preferably, the fixing member is a bolt.

[0033] Preferably, the two ends of the tensioning bolt are locked into the right end pressing plate and the left end pressing plate before the cold pre-tightening.

[0034] Preferably, the locking pair comprises a disc spring and a nut.

[0035] Preferably, the hot re-tightening comprises passing hot steam to soften the gasket inside the electrolytic tank.

[0036] As a preferred technical solution of the present application, the method comprises:

[0037] After sequentially installing the right end pressing plate, the right end electrode plate, the bipolar plate, the left end electrode plate, the left end pressing plate and the tensioning bolt, sequentially performing cold pre-tightening, hoisting and laying, hot re-tightening and cold final tightening, the assembly of the alkaline electrolytic tank is completed.

[0038] The engaging auxiliary device comprises a POM plate and positioning columns and engaging bosses provided on the POM plate; the number of the positioning columns is 2; the number of the engaging bosses is 2; the POM plate is in a circular arc shape, and one side of the POM plate is provided with an opening, the positioning columns are provided on both sides of the opening, and the positioning columns are provided on a first circular arc line parallel to the outer circular arc of the POM plate, the engaging bosses are provided on a second circular arc line parallel to the outer circular arc of the POM plate, and the engaging bosses are provided on the side of the opening pointing to the center of the circle.

[0039] The method for using the engaging auxiliary device comprises:

[0040] When the right end electrode plate is hoisted to 3-10 cm above the right end pressing plate, the two positioning columns are respectively inserted into the two bolt holes on the 0° and 180° orientation lines of the right end pressing plate, the two bolt holes are used as positioning fulcrums, the right end electrode plate is adjusted dynamically, the two engaging bosses are embedded into the grooves on the corresponding orientation of the right end electrode plate, the right end electrode plate is lowered to the right end pressing plate, and the installation of the right end electrode plate is completed.

[0041] The differential adjustment device is used when installing the left end pressing plate; the differential adjustment device comprises, from bottom to top, a base, a ball, a sliding trolley and a soft pad; the shape of the base comprises a groove; the soft pad covers the upper surface and the side surface of the sliding trolley; the ball is arranged on the base through a partition plate with an opening; the sliding trolley is arranged on the ball and moves along with the rolling of the ball; springs are arranged on the inner side of the periphery of the base, and the springs are arranged on the upper part of the ball and have a gap distance with the ball;

[0042] The use method of the differential adjustment device comprises:

[0043] Four differential adjustment devices are uniformly distributed at 90° above the left end plate, the left end pressing plate is hoisted and placed on the sliding trolley, the left end pressing plate is pushed to move in the radial direction and the circumferential direction, all the tensioning bolts are symmetrically and sequentially inserted into the bolt holes of the left end pressing plate and immersed into the bolt holes of the right end pressing plate, and the positioning of the left end pressing plate is completed; then the left end pressing plate is hoisted to be separated from the surface of the sliding trolley, the differential adjustment device is removed, and then the left end pressing plate is placed on the left end plate, and the installation of the left end pressing plate is completed;

[0044] The anti-falling device is used when hoisting; the anti-falling device comprises a cylindrical ring rod, a vertical plate, two horizontal plates and a bolt; the vertical plate and the bolt are arranged on the two sides of the two horizontally arranged horizontal plates, respectively, the two horizontally arranged horizontal plates have a first gap distance, and the vertical plate and the bolt have a second gap distance, and the bolt is used for fixedly connecting the two horizontal plates; the cylindrical ring rod is arranged on the vertical plate, away from the horizontal plate;

[0045] The use method of the anti-falling device comprises:

[0046] First, the end pressing plate where the hoisting hole of the electrolytic tank body is located is clamped by the two horizontal plates, locked by the bolt, and hoisted by the hoisting rope inserted into the cylindrical ring rod;

[0047] The two ends of the tensioning bolt inserted into the right end pressing plate and the left end pressing plate are locked before the cold state pre-tightening; the locking pair comprises a disc spring and a nut;

[0048] The hot state re-tightening comprises passing hot steam to soften the gasket inside the electrolytic tank.

[0049] Compared with the prior art, the method for efficiently and safely assembling the alkaline electrolytic tank has at least the following beneficial effects:

[0050] The method for efficiently and safely assembling the alkaline electrolytic tank provided by the application adopts corresponding methods on the key difficult-to-position components and the nodes with high safety risks in the whole assembly process of the alkaline electrolytic tank, embeds and engages the right end plate, adjusts the left end pressing plate by the differential, and enhances the anti-falling during the assembly of the electrolytic tank, so that the efficiency and safety of the whole process are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0051] Figure 1 is the structural schematic diagram of the meshing auxiliary device in the embodiment of the present application.

[0052] Figure 2 is the schematic diagram of the meshing auxiliary device embedded between the right end polar plate and the right end pressing plate in the embodiment of the present application.

[0053] Figure 3 is the structural schematic diagram of the level difference adjusting device in the embodiment of the present application.

[0054] Figure 4 is the schematic diagram of the level difference adjusting device placed between the left end pressing plate and the left end polar plate in the embodiment of the present application.

[0055] Figure 5 is the structural schematic diagram of the anti-falling device in the embodiment of the present application.

[0056] Figure 6 is the schematic diagram of the anti-falling device installed on the end pressing plate where the hoisting hole of the electrolytic cell body is located in the embodiment of the present application.

[0057] In the figure: 1-1 right end polar plate; 1-2 right end pressing plate;

[0058] 1-3 meshing auxiliary device; 1-3-1 base plate; 1-3-2 positioning column; 1-3-3 meshing boss;

[0059] 2-1 left end pressing plate; 2-2 left end polar plate;

[0060] 2-3 level difference adjusting device; 2-3-1 base; 2-3-2 partition plate; 2-3-3 ball; 2-3-4 sliding trolley; 2-3-5 soft pad; 2-3-6 elastic member;

[0061] 3-1 electrolytic cell body; 3-2 anti-falling device;

[0062] 3-2-1 cylindrical ring rod; 3-2-2 vertical plate; 3-2-3 horizontal plate; 3-2-4 fixing member. DETAILED DESCRIPTION

[0063] The technical solutions of the present application will be further illustrated below in combination with the drawings and through specific embodiments.

[0064] The present application will be further illustrated below. However, the following examples are only simple examples of the present application and do not represent or limit the protection scope of the present application, and the protection scope of the present application is subject to the claims.

[0065] It should be understood that, in the description of the present application, the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" and the like are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0066] It should be noted that, in the description of the present application, unless otherwise specified and limited, the terms "provided", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0067] As a specific embodiment of the present application, a method for efficiently and safely assembling an alkaline electrolytic cell is provided. The alkaline electrolytic cell has a gas production capacity of 1000 Nm³ / h, and the outer diameter of the left and right end pressure plates is 2300 mm, and the weight of each is 5 tons; the outer diameter of the left and right end plates and the bipolar plate is 2000 mm, wherein the weight of the left and right end plates is 1.5 tons, and the weight of each bipolar plate is 350 kg, and the overall weight of the assembled electrolytic cell is 55 tons.

[0068] The method comprises:

[0069] (1) Installing the right end pressure plate 1-2: horizontally placing the right end pressure plate 1-2 on the assembly platform, and using a horizontal laser ruler to adjust the level and multiple directions dynamically;

[0070] (2) Installing the right end plate 1-1 using the meshing auxiliary device 1-3;

[0071] The engagement auxiliary device 1-3 comprises a base plate 1-3-1, positioning columns 1-3-2 arranged on the base plate 1-3-1, and engagement bosses 1-3-3; the number of the positioning columns 1-3-2 is 2; the number of the engagement bosses 1-3-3 is 2; the base plate 1-3-1 is in the shape of a circular arc, and one side of the base plate 1-3-1 is provided with an opening, the positioning columns 1-3-2 are arranged on both sides of the opening, and the positioning columns 1-3-2 are arranged on a first circular arc line parallel to the outer circular arc of the base plate 1-3-1, the engagement bosses 1-3-3 are arranged on a second circular arc line parallel to the outer circular arc of the base plate 1-3-1, and the engagement bosses 1-3-3 are arranged on the side of the opening pointing to the center of the circle; a structural schematic diagram of the engagement auxiliary device 1-3 is shown in Figure 1 In the embodiment, the base plate 1-3-1 is a POM plate.

[0072] The use method of the engagement auxiliary device 1-3 comprises the following steps:

[0073] When the right end polar plate 1-1 is hoisted to be 3-10 cm above the right end pressing plate 1-2, the two positioning columns 1-3-2 are respectively inserted into the two bolt holes on the 0° and 180° azimuth lines of the right end pressing plate 1-2, the two bolt holes are used as positioning fulcrums, the right end polar plate 1-1 is finely adjusted by dynamic adjustment, the two engagement bosses 1-3-3 are embedded into the corresponding grooves on the right end polar plate 1-1, the right end polar plate 1-1 is lowered to the right end pressing plate 1-2, and the installation of the right end polar plate 1-1 is completed; a schematic diagram of the engagement auxiliary device 1-3 embedded between the right end polar plate 1-1 and the right end pressing plate 1-2 is shown in Figure 2

[0074] (3) Installation of the bipolar plate: the bipolar plate is hoisted and stacked above the right end polar plate 1-1, and the orientation is finely adjusted by using a positioning rod held by manpower;

[0075] (4) Installation of the left end polar plate: the left end polar plate 2-2 is hoisted and stacked above the bipolar plate, and the orientation is finely adjusted by using a positioning rod held by manpower;

[0076] (5) Installation of the left end pressing plate by using the position difference adjusting device 2-3;

[0077] ​The bit difference adjusting device 2-3 comprises, from bottom to top, a base 2-3-1, a ball 2-3-3, a sliding trolley 2-3-4 and a soft pad 2-3-5; the base 2-3-1 comprises a groove; the soft pad 2-3-5 covers the upper surface and the side surface of the sliding trolley 2-3-4; the ball 2-3-3 is arranged on the base 2-3-1 through a partition plate 2-3-2 with an opening; the sliding trolley 2-3-4 is arranged on the ball 2-3-3 and moves with the rolling of the ball 2-3-3; the inner side of the periphery of the base 2-3-1 is provided with an elastic member 2-3-6, and the elastic member 2-3-6 is arranged on the upper part of the ball 2-3-3 and has a gap distance with the ball 2-3-3; the structural diagram of the bit difference adjusting device 2-3 is shown in Figure 3 ; the elastic member 2-3-6 in the embodiment is a spring.

[0078] The use method of the bit difference adjusting device 2-3 comprises:

[0079] Four bit difference adjusting devices 2-3 are uniformly distributed at 90° above the left end polar plate 2-2, the left end pressing plate 2-1 is hoisted and placed on the sliding trolley 2-3-4, the left end pressing plate 2-1 is pushed to move in the radial direction and the circumferential direction, all the tension bolts are symmetrically and sequentially inserted into the bolt holes of the left end pressing plate 2-1 and immersed into the bolt holes of the right end pressing plate 1-2, and the positioning of the left end pressing plate 2-1 is completed; then the left end pressing plate 2-1 is hoisted to be away from the surface of the sliding trolley 2-3-4, the bit difference adjusting device 2-3 is removed, and then the left end pressing plate 2-1 is placed down until it is placed above the left end polar plate 2-2, and the installation of the left end pressing plate 2-1 is completed; the schematic diagram of the bit difference adjusting device 2-3 between the left end pressing plate 2-1 and the left end polar plate 2-2 is shown in Figure 4 ;

[0080] (6) Cold state pre-tightening: the disc spring and the nut are locked into the two ends of the tension bolts inserted into the left and right end pressing plates, and then pre-tightening is performed to ensure that the internal fittings of the entire electrolytic cell will not be loose or displaced;

[0081] (7) Hoisting and laying flat: the anti-falling device 3-2 is used when hoisting;

[0082] The anti-falling device 3-2 comprises a cylindrical ring rod 3-2-1, a vertical plate 3-2-2, two horizontal plates 3-2-3 and a fixing member 3-2-4; the vertical plate 3-2-2 and the fixing member 3-2-4 are respectively arranged on the two sides of the two horizontally arranged horizontal plates 3-2-3, the first gap distance is arranged between the two horizontally arranged horizontal plates 3-2-3, and the second gap distance is arranged between the vertical plate and the fixing member 3-2-4; the fixing member 3-2-4 is used for fixedly connecting the two horizontal plates 3-2-3; the cylindrical ring rod 3-2-1 is arranged on the vertical plate 3-2-2, away from the horizontal plate 3-2-3; and a structural schematic diagram of the anti-falling device is as shown in Figure 5 In the embodiment, the fixing member 3-2-4 is a bolt.

[0083] The use method of the anti-falling device 3-2 comprises the following steps:

[0084] First, the end pressing plate where the hoisting hole of the electrolytic tank body 3-1 is located is clamped by the two horizontal plates 3-2-3, and is locked by the fixing member 3-2-4; the hoisting rope is inserted into the cylindrical ring rod 3-2-1 for hoisting; and a schematic diagram of the anti-falling device 3-2 installed on the end pressing plate where the hoisting hole of the electrolytic tank body 3-1 is located is as shown in Figure 6

[0085] (8) Hot re-tightening and cold final tightening: hot steam is introduced to soften the gasket in the electrolytic tank, so that the stress of the re-tightening of the whole electrolytic tank can be reduced; the hot re-tightening is ended, and then the final cold tightening is performed after the electrolytic tank is cooled; at this time, the electrolytic tank reaches the design spacing, and the assembly of the whole electrolytic tank is completed.

[0086] In summary, the method for efficiently and safely assembling the alkaline electrolytic tank provided by the application increases the corresponding solutions for key components and key difficulties, solves the assembly problems and safety risks at key nodes, and avoids excessive interference with the conventional assembly method at most assembly nodes, so that new assembly problems caused by new technologies are avoided.

[0087] The applicant declares that the above description is only a specific embodiment of the application, but the protection scope of the application is not limited thereto; it should be understood by those skilled in the art that any changes or replacements within the technical scope disclosed by the application can be easily thought of by those skilled in the art, and all fall within the protection scope and disclosure scope of the application.​

Claims

1. A method of efficiently and safely assembling an alkaline electrolyzer, characterized by, The method comprises: sequentially installing a right end pressing plate (1-2), a right end polar plate (1-1), a bipolar plate, a left end polar plate (2-2), a left end pressing plate (2-1) and a tensioning bolt, and then sequentially performing cold pre-tightening, hoisting and laying, hot re-tightening and cold final tightening to complete the assembly of the alkaline electrolytic cell; Wherein, the meshing auxiliary device (1-3) is used when installing the right end polar plate (1-1); the position difference adjusting device (2-3) is used when installing the left end pressing plate (2-1); and the anti-falling device (3-2) is used when hoisting; The position difference adjusting device (2-3) comprises, from bottom to top, a base (2-3-1), a ball (2-3-3), a sliding trolley (2-3-4) and a soft pad (2-3-5); the shape of the base (2-3-1) comprises a groove; the soft pad (2-3-5) covers the upper surface and the side surface of the sliding trolley (2-3-4); the ball (2-3-3) is arranged on the base (2-3-1) through a partition plate (2-3-2) with an opening; the sliding trolley (2-3-4) is arranged on the ball (2-3-3) and moves with the rolling of the ball (2-3-3); the inner side of the periphery of the base (2-3-1) is provided with an elastic member (2-3-6), and the elastic member (2-3-6) is arranged on the upper part of the ball (2-3-3) and has a gap distance with the ball (2-3-3); The use method of the position difference adjusting device (2-3) comprises: Four position difference adjusting devices (2-3) are uniformly distributed at 90° above the left end polar plate (2-2), the left end pressing plate (2-1) is hoisted and laid on the sliding trolley (2-3-4), the left end pressing plate (2-1) is pushed to move in the radial direction and the circumferential direction, all the tensioning bolts are sequentially inserted into the bolt holes of the left end pressing plate (2-1) and immersed into the bolt holes of the right end pressing plate (1-2), and the left end pressing plate (2-1) is positioned; then the left end pressing plate (2-1) is hoisted to be away from the surface of the sliding trolley (2-3-4), the position difference adjusting device (2-3) is removed, and then the left end pressing plate (2-1) is laid down until it is placed above the left end polar plate (2-2), and the installation of the left end pressing plate (2-1) is completed.

2. The method of claim 1, wherein, The meshing auxiliary device (1-3) comprises a base plate (1-3-1) and at least two positioning columns (1-3-2) and at least two meshing bosses (1-3-3) arranged on the base plate (1-3-1); the base plate (1-3-1) is in the shape of a circular arc, and one side of the base plate (1-3-1) is provided with an opening, the positioning columns (1-3-2) are arranged on both sides of the opening, at least two positioning columns (1-3-2) are arranged on a first circular arc line parallel to the outer circular arc of the base plate (1-3-1), at least two meshing bosses (1-3-3) are arranged on a second circular arc line parallel to the outer circular arc of the base plate (1-3-1), and the meshing bosses (1-3-3) are arranged on the side of the opening pointing to the center of the circle; The number of the positioning columns (1-3-2) is 2; The number of the meshing bosses (1-3-3) is 2.

3. The method of claim 2, wherein, The method for using the engagement auxiliary device (1-3) comprises the following steps: When the right end plate (1-1) is hoisted to be 3-10 cm above the right end pressing plate (1-2), two positioning columns (1-3-2) are respectively inserted into two bolt holes on the 0° and 180° orientation lines of the right end pressing plate (1-2), the two bolt holes are used as positioning fulcrums, the right end plate (1-1) is dynamically adjusted, the two engagement bosses (1-3-3) are embedded into the corresponding recesses on the right end plate (1-1), the right end plate (1-1) is lowered to the right end pressing plate (1-2), and the installation of the right end plate (1-1) is completed.

4. The method of claim 1, wherein, The anti-falling device (3-2) comprises a cylindrical ring rod (3-2-1), a vertical plate (3-2-2), two horizontal plates (3-2-3) and a fixing member (3-2-4). The vertical plate (3-2-2) and the fixing member (3-2-4) are respectively arranged on the two sides of the two horizontally arranged horizontal plates (3-2-3), the first gap distance is formed between the two horizontally arranged horizontal plates (3-2-3), the second gap distance is formed between the vertical plate (3-2-2) and the fixing member (3-2-4), and the fixing member (3-2-4) is used for fixedly connecting the two horizontal plates (3-2-3). The cylindrical ring rod (3-2-1) is arranged on the vertical plate (3-2-2) and away from the horizontal plate (3-2-3).

5. The method of claim 4, wherein, The method for using the anti-falling device (3-2) comprises the following steps: First, the end pressing plate where the hoisting hole of the electrolytic tank body (3-1) is located is clamped by the two horizontal plates (3-2-3) and locked by the fixing member (3-2-4), and the hoisting rope is inserted into the cylindrical ring rod (3-2-1) for hoisting.

6. The method of claim 1, wherein, Before the cold pre-tightening, the two ends of the tensioning bolt locked into the right end pressing plate (1-2) and the left end pressing plate (2-1) are locked.

7. The method of claim 6, wherein, The locking pair comprises a disc spring and a nut.

8. The method of claim 1, wherein, The hot re-tightening comprises the step of passing hot steam to soften the gasket inside the electrolytic tank. The hot re-tightening comprises the step of passing hot steam to soften the gasket inside the electrolytic tank.

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