Positioning device and electrolytic cell assembling equipment

By using the positioning ring and limit fixing part of the positioning device during the assembly of the electrolytic cell, the offset problem of the tensioning bolts passing through the upper end pressing plate simultaneously is solved, which improves working efficiency and reduces costs.

CN222627576UActive Publication Date: 2025-03-18WUXI LONGI HYDROGEN TECH CO LTD
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Patent Information

Application Number
CN202421075175.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-16
Publication Date
2025-03-18
Estimated Expiration
2034-05-16

AI Technical Summary

Technical Problem

During the assembly of the electrolytic cell, there is a problem of offset when the tension bolts are synchronized through the perforation of the upper end pressure plate, resulting in low working efficiency and high labor consumption.

Method used

By adopting a positioning device, the tensioning bolts close to the upper end press plate are positioned through a positioning ring composed of a plurality of fixed distance plates, and the tensioning bolts correspond one by one to the perforations of the upper end press plate by means of the limit fixing part, thereby achieving synchronous passage.

Benefits of technology

The perforated installation coordination efficiency of the tension bolts and the upper end pressure plate is significantly improved, and manpower consumption and labor intensity are reduced, and production costs are reduced.

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Abstract

The utility model discloses a positioning device and electrolytic bath assembly equipment, relates to the technical field of electrolytic bath assembly, and aims at improving the assembly working efficiency of an electrolytic bath and reducing the manpower consumption and the production cost while realizing that each draw-in bolt synchronously penetrates through a corresponding through hole. The positioning device comprises a plurality of distance pieces which are sequentially connected in an end-to-end mode to form a positioning ring, and the distance pieces are detachably connected; and the multiple limiting and fixing parts are arranged on the distance piece, the limiting and fixing parts are used for limiting and fixing the tension bolts, and the limiting and fixing parts correspond to the tension bolts in a one-to-one mode so that the tension bolts can correspond to the penetrating holes of the upper end pressing plate in a one-to-one mode.
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Description

Technical Field

[0001] The utility model relates to the technical field of electrolytic cells, in particular to a positioning device and electrolytic cell assembly equipment. Background Art

[0002] At present, an electrolytic cell is usually composed of a plurality of stacked electrolytic chambers, and in order to ensure the stacking accuracy (verticality, centering) and sealing when the electrolytic cells are stacked, a horizontal layer-by-layer stacking method must be adopted. Horizontal layer-by-layer stacking refers to stacking the end pressure plates (including the upper end pressure plates and the lower end pressure plates), the plates, the diaphragms, and the gaskets vertically layer by layer. After the assembly is completed, the electrolytic cell is turned over to a horizontal state. After the electrolytic cell is stacked, the electrolytic cell is fastened by tightening the bolts.

[0003] During the entire assembly process of the electrolytic cell, not only a large number of tension bolts are used, but also the weight and length of a single tension bolt are large. In order to ensure the stacking accuracy and assembly efficiency of the electrolytic cell, all tension bolts need to synchronously pass through the perforations on the upper end pressure plate during the assembly process of the electrolytic cell. However, the closer to the upper end pressure plate, the greater the offset of the tension bolts in the vertical state, resulting in the inability of each tension bolt to cooperate smoothly with the corresponding perforations on the end pressure plate. At present, in order to ensure the synchronization of each tension bolt and the corresponding perforation, multiple staff members are arranged to support the tension bolts and cooperate with each other, and then ensure that all tension bolts synchronously pass through the perforations on the upper end pressure plate during the assembly process. However, this method not only consumes a lot of manpower, but also the entire process is time-consuming, labor-intensive, and costly, and the work efficiency is low.

[0004] Therefore, how to improve work efficiency and reduce work costs while ensuring that all tensioning bolts pass through the through holes on the end pressure plate synchronously is a technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0005] In view of this, an object of the utility model is to provide a positioning device, which can ensure that all the tensioning bolts pass through the through holes on the end pressure plate synchronously while improving the working efficiency and reducing the working cost.

[0006] Another object of the utility model is to provide an electrolytic cell assembly device having the above positioning device.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A positioning device, comprising:

[0009] A plurality of distance pieces are provided, each of which is connected end to end in sequence to form a positioning ring, and each of the distance pieces is detachably connected;

[0010] There are multiple limiting and fixing parts, which are arranged on the distance piece. The limiting and fixing parts are used to limit and fix the tightening bolts, and the limiting and fixing parts correspond to the tightening bolts one by one, so that each of the tightening bolts corresponds to the through hole of the upper end pressure plate one by one.

[0011] In the case of adopting the above technical solution, compared with the existing method of supporting and coordinating the tension bolts by multiple staff members to ensure that each tension bolt is synchronously inserted into the corresponding perforation of the upper end pressure plate, the present application positions one end of the tension bolt close to the upper end pressure plate by a positioning outer ring formed by a combination of multiple distance pieces, that is, the tension bolt is installed on the distance piece through the limiting fixing part on the distance piece, so that each limited and fixed tension bolt corresponds to each perforation of the upper end pressure plate one by one, and then when the electrolytic cell is assembled, each tension bolt can be synchronously passed through the corresponding perforation of the upper end pressure plate, and the two adjacent distance pieces, as well as the distance piece and the tension bolt are all detachably connected, so that after the tension bolt passes through the perforation of the upper end pressure plate, the positioning device of the present application can be quickly disassembled. In this way, not only the efficiency of the perforation installation and coordination of the tension bolt and the upper end pressure plate is significantly improved, but also the consumption of manpower is greatly reduced, the labor intensity of the staff is reduced, and at the same time, it is conducive to reducing the production cost of the electrolytic cell.

[0012] Optionally, in the above positioning device, the distance piece includes a first distance piece and a second distance piece, one of the first distance piece and the second distance piece is provided with a positioning pin, and the other is provided with a positioning hole matched with the positioning pin, and the first distance piece and the second distance piece are alternately connected in sequence through the positioning pin and the positioning hole to form the positioning ring. In this way, by providing matching positioning pins and positioning holes on the distance pieces, not only a detachable connection between the distance pieces is achieved, but also the positioning of adjacent distance pieces when connected is performed through the positioning pins and the positioning holes, so as to ensure that the formed positioning ring has a good required roundness.

[0013] Optionally, in the above positioning device, the positioning hole is provided with an installation opening, and the positioning pin enters the positioning hole through the installation opening. In this way, when the positioning pin and the positioning hole are installed, the positioning pin can be quickly installed into the positioning hole through the installation opening, and similarly, the positioning pin can also quickly slide out of the positioning hole through the installation opening, making it easy to disassemble the positioning ring, thereby improving overall work efficiency and convenience.

[0014] Optionally, in the above positioning device, the positioning hole and the positioning pin are closer to the outer ring of the positioning ring relative to the inner ring of the positioning ring. In this way, the positioning hole and the positioning pin are arranged near the edge of the outer ring of the positioning ring, which can further improve the convenience of disassembly and assembly for the positioning ring located outside the tensioning bolt.

[0015] Optionally, in the above positioning device, the limiting fixing portion is a limiting groove provided in the distance piece, and the limiting groove is used to clamp and fix the tension bolt. In this way, by providing a limiting groove in the distance piece to clamp and fix the tension bolt, not only the distance piece and the tension bolt can be detachably installed, but also the efficiency of disassembly and assembly of the distance piece and the tension bolt is ensured.

[0016] Optionally, in the above positioning device, some of the limiting grooves in any two adjacent distance pieces overlap. Thus, when part of the positioning grooves opened above are located in the overlapping area of ​​two adjacent distance pieces, grooves are opened at the same position of the two distance pieces at the same time and overlap to form a positioning groove.

[0017] Optionally, in the above positioning device, the side wall of the limiting groove is provided with a guiding inclined surface, the guiding inclined surface extends to the notch of the limiting groove, and the guiding inclined surface extends in a direction away from the center of the limiting groove, and the tensioning bolt slides into or out of the limiting groove through the guiding inclined surface. In the case of adopting the above solution, when the tensioning bolt is inserted into the limiting groove through the notch of the limiting groove, the guiding inclined surface guides the tensioning bolt, so that the tensioning bolt can slide in and out smoothly.

[0018] Optionally, the positioning device further includes a support portion, through which the positioning ring is fixed to the tension bolt, the positioning ring is close to the upper end pressure plate relative to the lower end pressure plate of the electrolytic cell, and the support portion is detachably connected to the positioning ring and the tension bolt. In this way, the distance piece is fixed to the tension bolt through the support portion, which ensures that the limit ring has good stability, and then effectively prevents the positioning ring from sliding during the assembly process, ensuring the high efficiency of the assembly. At the same time, the support portion is also detachably connected to the positioning ring and the tension bolt, which is convenient for the installation and disassembly of the positioning device of the present application.

[0019] Optionally, in the above positioning device, the support portion includes a magnetic bracket, the magnetic bracket is made of magnetic material, the magnetic bracket is magnetically adsorbed on the tension bolt, and the magnetic bracket is provided with a support surface, and the magnetic bracket is supported on a side of the distance piece away from the upper end pressure plate through the support surface. In this way, the magnetic bracket uses magnetic force to adsorb and fix the tension bolt and the distance piece, thereby realizing a detachable connection between the support portion, the tension bolt and the distance piece, while also reducing the complexity of the overall structure and the development cost.

[0020] Optionally, in the above positioning device, a total of 4 spacers are provided, and the number of the first spacers and the number of the second spacers are 2. In this way, the positioning ring composed of two first spacers and two second spacers is symmetrically arranged around the center of the positioning ring, which can further improve the stability and roundness of the overall structure of the positioning ring.

[0021] The utility model also provides an electrolytic cell assembly device, including a positioning device, wherein the positioning device is any of the positioning devices described above. The electrolytic cell assembly device provided by the utility model has all the technical effects of the positioning device described above, and will not be described in detail herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 A schematic diagram of a positioning device provided in an embodiment of the utility model;

[0024] Figure 2 A schematic diagram of a first distance piece provided in an embodiment of the utility model;

[0025] Figure 3 A schematic diagram of a second distance piece provided in an embodiment of the utility model;

[0026] Figure 4 A schematic diagram of a magnetic bracket provided in an embodiment of the utility model;

[0027] Figure 5 A schematic diagram of the assembly of a positioning ring and a tensioning bolt provided in an embodiment of the utility model.

[0028] Reference numerals: 100 is a distance piece, 110 is a first distance piece, 120 is a second distance piece, 130 is a positioning pin, 140 is a positioning hole, 141 is a mounting opening, 150 is a limiting groove, and 151 is a guiding inclined surface;

[0029] 200 is a magnetic bracket;

[0030] 300 is the tension bolt;

[0031] 400 is an upper end pressure plate. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral 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. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] like Figure 1As shown, the embodiment of the utility model discloses a positioning device, including a distance piece 100 and a limit fixing part. There are multiple distance pieces 100, and each distance piece 100 is sequentially connected end to end to form a positioning ring, and any two adjacent distance pieces 100 are detachably connected to each other, so that after the tension bolt 300 and the upper end pressure plate 400 are perforated and assembled, the positioning ring can be removed in time. The limiting and fixing parts for limiting and fixing the tensioning bolts 300 are arranged on each distance piece 100 of the positioning ring. The number of the limiting and fixing parts is the same as the number of the tensioning bolts 300 and corresponds one to one. Then, after the tensioning bolts 300 are installed on the positioning ring formed by the distance pieces 100 through the limiting and fixing parts, all the tensioning bolts 300 are limited and fixed. At the same time, the position of the positioning ring is close to the upper end pressure plate 400 relative to the lower end pressure plate of the electrolytic cell, so as to prevent the tensioning bolts 300 in the vertical state from deviating and diverging more seriously as they get closer to the upper end pressure plate 400, so that each tensioning bolt 300 remains on the same circumference, and the roundness of the circumference of the tensioning bolts 300 is the same as the roundness of the circumference of each through-hole of the upper end pressure plate 400. The tensioning bolts 300 correspond to the through-holes one by one, thereby ensuring that each tensioning bolt 300 can pass through the corresponding through-holes at the same time. Compared with the existing method of supporting and coordinating the tensioning bolts by multiple staff members to ensure that each tensioning bolt is synchronously inserted into the corresponding perforations of the upper end pressure plate, the present application not only significantly improves the efficiency of the perforation installation coordination between the tensioning bolts and the upper end pressure plate, but also greatly reduces the manpower consumption and input, reduces the labor intensity of the staff, and is conducive to reducing the production cost of the electrolytic cell.

[0038] like Figure 2 and Figure 3 As shown, the number of the spacers 100 can be set according to actual conditions, but the number of the spacers 100 is at least not less than two to ensure that the positioning ring is detachable. The plurality of spacers 100 can be divided into a first spacer 110 and a second spacer 120, wherein one of the first spacer 110 and the second spacer 120 is provided with a positioning pin 130, and the other is provided with a positioning hole 140 that matches the positioning pin 130. When the first spacer 110 and the second spacer 120 are alternately connected to form a positioning ring, the positioning pin 130 is inserted into the positioning hole 140 to achieve the detachable connection between the spacers 100. The latch-type cooperation between the positioning pin 130 and the positioning hole 140 not only improves the work efficiency of installation and disassembly, but also the positioning pin 130 and the positioning hole 140 play a positioning role between the two connected spacers 100, so that the positioning ring composed of the spacers 100 has good contour accuracy and stability, thereby improving the positioning accuracy and fixing stability of the tension bolt 300.

[0039] like Figure 2As shown, the positioning hole 140 is provided with an installation opening 141, and the installation opening 141 is connected to the positioning hole 140. Therefore, when the positioning pin 130 is installed and matched with the positioning hole 140, the positioning pin 130 can quickly slide into the positioning hole 140 through the installation opening 141. Similarly, when the positioning ring is disassembled, the positioning pin 130 can also quickly slide out of the positioning hole 140 through the installation opening 141, so as to achieve rapid disassembly between the distance pieces 100. Of course, the positioning hole 140 may not have a circular hole with a closed loop of the installation opening 141. When the positioning pin 130 and the positioning hole 140 are mutually matched, the positioning pin 130 can be directly inserted into the positioning hole from above.

[0040] Furthermore, the positioning holes 140 and the positioning pins 130 are arranged at the edge of the outer ring of the positioning ring relative to the inner ring of the positioning ring. When the positioning ring is removed, the staff can simply pull in the direction opposite to the center of the positioning ring to disassemble each distance piece 100, which is convenient for the staff to perform the disassembly action and further improves the work efficiency of installation and disassembly.

[0041] In a specific embodiment, the limiting fixing part is a limiting groove 150 provided on the distance piece 100, and the tension bolt 300 is clamped and fixed by the limiting groove 150. While satisfying the fixing of the tension bolt 300, the distance piece 100 and the tension bolt 300 are detachably connected, and the simplicity of the structural design and the operability of the device are improved. In another specific embodiment, the limiting fixing part can also be a semi-annular magnetic ring provided on the distance piece 100. When the distance piece 100 and the tension bolt 300 are assembled, the tension bolt 300 can be directly adsorbed into the magnetic ring by magnetic force, so as to fix the tension bolt 300. Alternatively, those skilled in the art can design the limiting fixing part according to actual needs, which will not be listed one by one in this article.

[0042] like Figure 1 As shown, when some of the limiting grooves 150 on the positioning ring are located in the overlapping area of ​​two adjacent distance pieces 100, grooves are simultaneously opened at the same position of the two distance pieces 100 so that the grooves of the two distance pieces 100 overlap to form a limiting groove 150 to clamp and fix the tensioning bolt 300.

[0043] like Figure 2 and Figure 3As shown, a guide slope 151 is provided on the side wall of one side of the limiting groove 150, and the guide slope 151 extends outward to the notch of the limiting groove 150, and the guide slope 151 extends away from the center direction of the limiting groove 150, presenting an inclined state to expand the notch of the limiting groove 150, and then when the tensioning bolt 300 is installed with the limiting groove 150, the guide slope 151 guides the tensioning bolt 300, so that the tensioning bolt 300 slides smoothly into the limiting groove 150. Of course, it can be understood that a guide slope can also be provided on the side wall of one side of the positioning hole 140, and the guide slope extends to the installation opening 141, so that the positioning pin 130 slides smoothly into the positioning hole 140 through the guide slope. Therefore, the convenience and efficiency of disassembly and assembly of the positioning device provided by this embodiment are further improved by the provision of the guide slope 151.

[0044] In the process of limiting and fixing the tensioning bolt 300 by the positioning ring, in order to ensure the stability of the positioning ring, the positioning device provided in this embodiment is also provided with a support part, and the positioning ring is fixed on the tensioning bolt 300 through the support part, and then the positioning ring is prevented from sliding up and down or shifting along the tensioning bolt 300 by the support part, thereby ensuring that the positioning ring has good stability. In addition, the support part, the positioning ring and the tensioning bolt 300 are all detachably connected, which improves the convenience of installation and disassembly of the positioning device provided in this embodiment. Alternatively, in the process of limiting and fixing the tensioning bolt 300 by the positioning ring, the staff can directly fix the positioning by hand to prevent the positioning ring from sliding or shifting, without providing a support part, thereby reducing the number of parts and components provided by the positioning device, further improving the working efficiency of the positioning device and reducing the cost.

[0045] like Figure 4 and Figure 5 As shown, the positioning device provided in this embodiment is provided with a magnetic bracket 200, and the magnetic bracket 200 is made of magnetic material, so the magnetic bracket 200 can be fixed on the tension bolt 300 by magnetic adsorption, and the magnetic bracket 200 is adsorbed and fixed on the side of the distance piece 100 away from the upper end pressure plate 400 through the support surface provided, so as to support and fix the distance piece 100. At the same time, because the magnetic bracket 200 is magnetically connected with the tension bolt 300 and the distance piece 100, after the tension bolt 300 and the upper end pressure plate 400 are perforated and matched, the three can be directly separated and disassembled from each other, and then the magnetic bracket 200 forms a support part. The above-mentioned design of the magnetic bracket 200 using magnetic force reduces the complexity and development cost of the overall structure. Alternatively, those skilled in the art can design a detachable connection method between the support part and the tension bolt 300 and the distance piece 100 according to actual needs, such as fixing the tension bolt 300 by a clamp, which will not be listed one by one in this article.

[0046] In a specific embodiment, the number of the distance pieces 100 of the positioning device provided in this embodiment is 4, wherein the number of the first distance pieces 110 and the second distance pieces 120 are 2 respectively, and the two first distance pieces 110 and the two second distance pieces 120 are alternately connected to each other and assembled into a positioning ring. In the specific use process, take the electrolytic cell provided with 18 tensioning bolts 300 as an example. First, select two symmetrical tensioning bolts 300, and adsorb the magnetic bracket 200 on the tensioning bolts 300. It should be noted that the supporting surface of the magnetic bracket 200 should be parallel to the end plate, and then the first distance pieces 110 are symmetrically installed respectively based on the two tensioning bolts 300. Then, select another two tensioning bolts 300 that are arranged at an angle of 80° to the tensioning bolt 300 installed with the first distance piece 110, and adsorb the magnetic bracket 200 on the two tensioning bolts 300. Similarly, the supporting surface of the magnetic bracket 200 should be parallel to the end plate. Then install the second distance piece 120, and insert the positioning pin 130 into the positioning hole to assemble into a positioning ring. At this point, the positioning of the 18 tensioning bolts 300 is guaranteed, and they are evenly distributed on the same circle. Finally, after the above work is confirmed to be completed, the upper end pressure plate 400 is lifted and slowly lowered from directly above the stacked trough body. During the lowering process, the staff only needs to slightly adjust the upper end pressure plate 400 to ensure that the through holes of the upper end pressure plate 400 are aligned with the positioned tensioning bolts 300, and then continue to lower the upper end pressure plate 400. When the tensioning bolts 300 synchronously penetrate the through holes by about 50 to 100 mm, insert the guide rods from the airway circular holes and the liquid channel circular holes respectively, and then continue to slowly descend again until the upper end pressure plate 400 is close to the positioning ring for a certain distance, stop the lowering of the upper end pressure plate 400, and then remove the positioning device provided in this embodiment from the tensioning bolts 300.

[0047] Through the positioning device designed above, only 2 to 3 workers are needed to complete the assembly of the positioning ring, and the positioning ring is used to limit and fix the tension bolt 300, thereby ensuring the smooth installation of the upper end pressure plate 400 of the electrolytic cell. Of course, it can be understood that those skilled in the art can set the number of the distance pieces 100 according to actual needs, which will not be described in detail herein.

[0048] The utility model also discloses an electrolytic cell assembly device including a positioning device. Since the electrolytic cell assembly device has the positioning device, it has all the technical effects of the positioning device, which will not be described in detail herein.

[0049] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0050] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A positioning device, characterized in that: include: A plurality of distance pieces are provided, each of which is connected end to end in sequence to form a positioning ring, and each of the distance pieces is detachably connected; There are multiple limiting and fixing parts, which are arranged on the distance piece. The limiting and fixing parts are used to limit and fix the tightening bolts, and the limiting and fixing parts correspond to the tightening bolts one by one, so that each of the tightening bolts corresponds one by one to the through holes of the upper end pressure plate of the electrolytic cell.

2. The positioning device according to claim 1, characterized in that: The distance piece includes a first distance piece and a second distance piece, wherein one of the first distance piece and the second distance piece is provided with a positioning pin, and the other is provided with a positioning hole matching the positioning pin, and the first distance piece and the second distance piece are alternately connected in sequence through the positioning pin and the positioning hole to form the positioning ring.

3. The positioning device according to claim 2, characterized in that: The positioning hole is provided with an installation opening, and the positioning pin enters into the positioning hole through the installation opening.

4. The positioning device according to claim 3, characterized in that: The positioning hole and the positioning pin are close to the outer ring of the positioning ring relative to the inner ring of the positioning ring.

5. The positioning device according to claim 1, characterized in that: The limiting fixing portion is a limiting groove opened on the distance piece, and the limiting groove is used for clamping and fixing the tightening bolt.

6. The positioning device according to claim 5, characterized in that: Part of the limiting grooves in any two adjacent distance pieces overlap.

7. The positioning device according to claim 5, characterized in that: The side wall of the limiting groove is provided with a guiding bevel, the guiding bevel extends to the notch of the limiting groove, and the guiding bevel extends away from the center direction of the limiting groove, and the tensioning bolt slides into or out of the limiting groove through the guiding bevel.

8. The positioning device according to claim 1, characterized in that: It also includes a support portion, through which the positioning ring is fixed to the tensioning bolt, the positioning ring is close to the upper end pressure plate relative to the lower end pressure plate of the electrolytic cell, and the support portion is detachably connected to the positioning ring and the tensioning bolt.

9. The positioning device according to claim 8, characterized in that: The support portion includes a magnetic bracket, which is made of magnetic material. The magnetic bracket is magnetically adsorbed on the tightening bolt, and the magnetic bracket is provided with a support surface. The magnetic bracket is supported on a side of the distance piece away from the upper end pressure plate through the support surface.

10. The positioning device according to claim 2, characterized in that: There are four distance pieces in total, and the number of the first distance pieces and the number of the second distance pieces are two respectively.

11. An electrolytic cell assembly device, characterized in that: It comprises a positioning device, and the positioning device is the positioning device according to any one of claims 1-10.

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