Tool for maintaining electrolytic cell

Abstract

The utility model relates to a tool for the maintenance of electrolytic cell, including: screw, nut and casing pipe subassembly, casing pipe subassembly includes: flange and welding in the flange lower part, the lower end of screw is provided in the location hole of dismantled subassembly, the casing pipe is provided between screw and the location hole wall of dismantled subassembly, and the screw is in the flange lower part. The nut is arranged on the screw rod in a sleeving mode and located above the flange, a conical base with the upper portion narrow and the lower portion wide is arranged at the bottom of the screw rod, a conical surface matched with the conical base of the screw rod is arranged at the bottom of the sleeve, the sleeve assembly is divided into a plurality of sleeve assembly sections in the circumferential direction, a gap is formed between every two adjacent sleeve assembly sections, and the sleeve assembly is sleeved with the nut. Therefore, dislocation of the cathode plate and the anode plate and overall scrapping of the PEM film are avoided, meanwhile, the maintenance efficiency is greatly improved, and the maintenance cost is reduced.

Description

[Technical Field]

[0001] This utility model relates to the field of fuel cells, and in particular to a tooling for repairing electrolyzers. [Background Technology]

[0002] A fuel cell stack consists of end plates, insulating plates, and multiple individual cells (each individual cell contains an electrode plate and a PEM membrane). These components are stacked together and assembled by compression. In existing technologies, the most common method is to assemble the components together using bolts and nuts. When the electrode plate or PEM film of one of the multiple single cells is damaged, the bolts and nuts must first be removed. Then, the end plate, insulating plate, and the cell itself must be removed one by one before repairing the damaged cell. During disassembly, the electrode plate is prone to planar displacement, leading to misalignment of the anode and cathode, and ultimately causing the entire PEM film to fail. Therefore, this traditional repair method not only easily leads to the failure of the entire PEM film but is also time-consuming and reduces the repair efficiency of maintenance workers. Therefore, we are considering whether it is possible to develop a tooling that allows all the end plates, insulating plates, and the cell itself to be assembled and disassembled as a whole when repairing a damaged single cell. This would not only avoid the failure of the PEM film during assembly and disassembly but also greatly improve repair efficiency. [Utility Model Content]

[0003] To address the aforementioned problems, the purpose of this utility model is to provide a tooling for electrolytic cell maintenance that can prevent the PEM membrane from being scrapped during the maintenance process.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a tooling for repairing an electrolytic cell, comprising: a screw, a nut, and a sleeve assembly. The sleeve assembly includes: a flange and a sleeve welded below the flange. The lower end of the screw is disposed in a positioning hole of the component to be disassembled. The sleeve is disposed between the screw and the wall of the positioning hole of the component to be disassembled. The nut is sleeved on the screw and located above the flange. The bottom of the screw is provided with a tapered base that is narrower at the top and wider at the bottom. The bottom of the sleeve is provided with a tapered surface that mates with the tapered base of the screw. The sleeve assembly is divided into several sleeve assembly segments along the circumference, and a gap is formed between each pair of adjacent sleeve assembly segments.

[0005] Preferably, the tooling for maintaining the electrolytic cell in this utility model is further configured such that the taper of both the conical base and the conical surface is 45°.

[0006] Preferably, the tooling for repairing the electrolytic cell in this utility model is further configured such that the gap between any two adjacent sleeve assembly segments is ≥2mm.

[0007] Preferably, the tooling for repairing the electrolytic cell in this utility model is further configured such that the disassembled component includes an upper end plate, an insulating plate, and a single cell located above the damaged single cell.

[0008] Preferably, the tooling for maintaining the electrolytic cell in this utility model is further configured such that several lifting rings are provided above the upper end plate.

[0009] Preferably, the tooling for repairing the electrolytic cell in this utility model is further configured such that the number of the sleeve assembly segments is two.

[0010] Preferably, the tooling for repairing the electrolytic cell in this utility model is further configured such that the circumferential component of the preload applied by the nut to the sleeve assembly is ≥ 4 times the weight of the assembly being disassembled.

[0011] Preferably, the tooling for maintaining the electrolytic cell in this invention is further configured such that the sleeve is made of stainless steel.

[0012] Preferably, the tooling for maintaining the electrolytic cell in this invention is further configured such that the screw is made of high-strength alloy steel.

[0013] Compared with the prior art, the present invention has the following advantages: by using the tooling in the present invention, the upper plate, the insulating plate and the single cell above the damaged single cell can be assembled and disassembled as a whole, avoiding the assembly and disassembly of each piece in the prior art, thereby avoiding the misalignment of the anode and cathode plates and the overall scrapping of the PEM film, while greatly improving the repair efficiency and reducing the repair cost. [Attached Image Description]

[0014] Figure 1 This is a schematic diagram of the tooling used for maintaining the electrolytic cell in this utility model.

[0015] Figure 2 This is a schematic diagram of the screw structure in this utility model.

[0016] Figure 3 This is a top view of the sleeve assembly in this utility model.

[0017] Figure 4 This is a structural schematic diagram of a single sleeve assembly segment in this utility model.

[0018] Figures 1 to 4 In the middle: 1. Screw, 10. Conical base, 2. Nut, 3. Sleeve assembly, 30. Flange, 31. Sleeve, 310. Conical surface, 32. Sleeve assembly section, 33. Gap, 4. Assembly to be disassembled, 40. Positioning hole, 41. Upper end plate, 42. Insulating plate, 43. Single cell.

Detailed Implementation Methods

[0019] The following is a further detailed description of a tool for electrolytic cell maintenance according to the present utility model through specific embodiments.

[0020] As shown Figures 1 to 4 A tool for electrolytic cell maintenance includes: a screw 1, a nut 2 and a sleeve assembly 3. The sleeve assembly 3 includes: a flange 30 and a sleeve 31 welded below the flange 30. The lower end of the screw 1 is arranged in the positioning hole 40 of the disassembled component 4. The disassembled component 4 includes an upper end plate 41, an insulating plate 42 and a single cell 43 located above the damaged single cell. A plurality of lifting rings (not shown) are provided above the upper end plate 41. The sleeve 31 is arranged between the screw 1 and the hole wall of the positioning hole 40 of the disassembled component 4. The nut 2 is sleeved on the screw 1 and located above the flange 30. The bottom of the screw 1 is provided with a tapered base 10 with a narrower upper part and a wider lower part. The bottom of the sleeve 31 is provided with a conical surface 310 that matches the tapered base 10 of the screw 1. The nut 2 provides a pre-tightening force for the sleeve assembly 3. Since the conical surface 310 at the bottom of the sleeve 31 and the tapered base 10 at the bottom of the screw 1 form a self-locking structure through the inclined surface, a circumferential component force will be generated at the conical surface 310 at the bottom of the sleeve 31 by the pre-tightening force, and this circumferential component force ≥ 4 times the weight of the disassembled component 4. Under the action of this circumferential component force, the disassembled component 4 can be prevented from falling due to gravity. In this embodiment, the taper of both the tapered base 10 of the screw 1 and the conical surface 310 at the bottom of the sleeve 31 is 45°. The outer diameter of the flange 30 is 25 mm, the outer diameter of the sleeve 31 is 15 mm, the inner diameter of the sleeve 31 is 10 mm, the large end diameter of the conical surface of the tapered base 10 is 15 mm, the small end diameter of the conical surface of the tapered base 10 is 10 mm. The material of the sleeve 31 is stainless steel, so it has good corrosion resistance. The material of the screw 1 is high-strength alloy steel. The length of the sleeve 31 is designed according to the distance from the damaged single cell to the upper surface of the upper end plate.

[0021] The sleeve assembly 3 is divided into several sleeve assembly segments 32 along the circumferential direction. A gap 33 is formed between every two adjacent sleeve assembly segments 32, and the gap 33 formed between every two adjacent sleeve assembly segments 32 ≥ 2 mm, so as to facilitate the insertion of the sleeve assembly segments 32 between the screw 1 and the hole wall of the positioning hole 40 of the disassembled component 4. In this embodiment, the number of the sleeve assembly segments 32 is two two two, forming a symmetrical split structure. Of course, in other embodiments, the number of the sleeve assembly segments 32 can also be three or four, and the present utility model can also be realized.

[0022] In summary, by using the tooling in this utility model, the upper plate, insulating plate, and single cell above the damaged single cell can be assembled and disassembled as a whole, avoiding the piece-by-piece assembly and disassembly required in the prior art. This also avoids misalignment of the anode and cathode plates and the overall scrapping of the PEM film, while greatly improving maintenance efficiency and reducing maintenance costs.

[0023] The above embodiments are merely illustrative of the principles and effects of this utility model, as well as some of its applications, and are not intended to limit this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A tooling for maintaining an electrolytic cell, characterized in that: include: A screw, nut, and sleeve assembly, wherein the sleeve assembly includes: a flange and a sleeve welded below the flange; the lower end of the screw is disposed in a positioning hole of the component to be disassembled; the sleeve is disposed between the screw and the wall of the positioning hole of the component to be disassembled; the nut is sleeved on the screw and located above the flange; the bottom of the screw has a tapered base that is narrower at the top and wider at the bottom; the bottom of the sleeve has a tapered surface that mates with the tapered base of the screw; the sleeve assembly is divided into several sleeve assembly segments along the circumference, with a gap formed between each two adjacent sleeve assembly segments.

2. The tooling for maintaining an electrolytic cell as described in claim 1, characterized in that: The taper of both the conical base and the conical surface is 45°.

3. The tooling for maintaining an electrolytic cell as described in claim 1, characterized in that: The gap between any two adjacent sleeve assembly segments is ≥2mm.

4. The tooling for maintaining an electrolytic cell as described in claim 1, characterized in that: The disassembled components include an upper plate, an insulating plate, and the single cell located above the damaged single cell.

5. The tooling for maintaining an electrolytic cell as described in claim 4, characterized in that: Several lifting rings are provided above the upper end plate.

6. The tooling for maintaining an electrolytic cell as described in claim 1, characterized in that: The number of sleeve assembly segments is two.

7. The tooling for maintaining an electrolytic cell as described in claim 1, characterized in that: The circumferential component of the preload applied by the nut to the sleeve assembly is ≥ 4 times the weight of the disassembled assembly.

8. The tooling for maintaining an electrolytic cell as described in claim 1, characterized in that: The sleeve is made of stainless steel.

9. The tooling for maintaining an electrolytic cell as described in claim 1, characterized in that: The screw is made of high-strength alloy steel.

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