Tool and method for maintaining PEM electrolytic cell

Abstract

The invention relates to a tool for maintaining a PEM electrolytic bath and a maintenance method.The tool comprises a frame piece, at least two upper cross beams arranged above the frame piece and at least two sets of blade assemblies installed on the frame piece, and the upper cross beams are fixed to an upper end plate of the PEM electrolytic bath through fixing pieces; the upper cross beam and the frame piece are connected through at least two sets of distance adjusting mechanisms, each set of blade assembly comprises a blade installation base and a blade, and the blade installation base and the frame piece are connected through a connecting piece. And the upper cell body of the electrolytic cell above the damaged small chamber can be mounted and dismounted as a whole, so that the problem of polar plate displacement caused by one-by-one mounting in the prior art is avoided, and in addition, the overall mounting also improves the maintenance efficiency.

Description

Technical field

[0001] The present invention relates to the field of PEM electrolyzers, and in particular to a tool and a maintenance method for repairing PEM electrolyzers. [Background Technology]

[0002] The PEM electrolyzer is an electrochemical device that uses electrical energy to decompose water into hydrogen and oxygen. Its core uses a proton exchange membrane (PEM) as the electrolyte, and has the characteristics of high efficiency, fast response, and high hydrogen production purity.

[0003] With the development of PEM electrolyzers, PEM electrolyzers with a hydrogen production capacity of 200 standard cubic meters per hour have become the mainstream in the market. A PEM electrolyzer, a device that produces hydrogen by electrolysis of water, consists of multiple stacked reaction chambers. These chambers are primarily composed of bipolar plates, membrane electrodes, carbon paper, and titanium felt. A 200 cubic meter electrolyzer typically contains approximately 150 chambers. When a chamber develops a problem and requires replacement or repair, the conventional industry repair method involves removing all the bipolar plates, membrane electrodes, insulator plates, and end plates above the damaged chamber piece by piece. The damaged chamber is then replaced and repaired. After the repair is complete, all the bipolar plates, membrane electrodes, insulator plates, and end plates above the damaged chamber are reinstalled piece by piece. This repair method is not only inefficient, but also prone to planar displacement during the piece-by-piece removal of the bipolar plates, membrane electrodes, and other materials, leading to misalignment of the anode and cathode plates and the resulting failure of the PEM membrane. This traditional repair method not only easily leads to the failure of the entire PEM membrane but is also time-consuming and reduces the efficiency of maintenance workers. Therefore, we thought that if we change the maintenance method, when a small chamber is damaged, all the bipolar plates, membrane electrodes, insulating plates, end plates and other materials above the damaged chamber can be disassembled and installed as a whole, the problem of plate displacement in the process of disassembling one by one can be avoided, and the maintenance efficiency can be improved. However, since the weight of the end plates and insulating plates is more than hundreds of kilograms, the weight of a single chamber is also about 3kg. Taking 100 small chambers as an example, the weight of 100 small chambers is basically about 300kg. Therefore, it is not feasible to install and disassemble by manpower. It is necessary to use tooling to form all the bipolar plates, membrane electrodes, insulating plates, end plates and other materials above the damaged chamber into a whole and hoist them. The present invention aims to provide such a tooling and maintenance method. [Summary of the invention]

[0004] In order to solve the above problems, the object of the present invention is to provide a tool and a maintenance method for repairing a PEM electrolyzer that can improve maintenance efficiency.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a tool for repairing a PEM electrolyzer, comprising: a frame member, at least two upper beams arranged above the frame member and at least two groups of blade assemblies installed on the frame member, the upper beams are fixed to the upper end plate of the PEM electrolyzer through fixing members, the upper beams and the frame member are connected by at least two groups of spacing adjustment mechanisms, each group of blade assemblies includes a blade mounting seat and a blade, and the blade mounting seat and the frame member are connected by a connecting member.

[0006] Preferably, a tool for repairing a PEM electrolyzer in the present invention is further configured as follows: each set of spacing adjustment mechanisms includes: a first vertical screw and an adjustment nut, the upper crossbeam is provided with a first through hole, the first vertical screw is passed through the first through hole, the bottom of the first vertical screw is connected to the frame member, and the adjustment nut is sleeved on the first vertical screw segment above the upper crossbeam.

[0007] Preferably, a tool for repairing a PEM electrolyzer in the present invention is further configured as follows: a slot is provided on one side of the blade mounting seat, the blade is inserted into the slot, an adjustment bolt for adjusting the blade insertion depth and an anti-detachment bolt for preventing the blade from detaching from the blade mounting seat are provided on the blade mounting seat, and the blade is provided with a long hole that cooperates with the anti-detachment bolt.

[0008] Preferably, a tool for repairing a PEM electrolyzer in the present invention is further configured as follows: the connecting parts between the blade mounting seat and the frame member are bolts and nuts, the blade mounting seat is provided with a first mounting hole matching the bolt, and the frame member is provided with a second mounting hole matching the bolt, one of the first mounting hole and the second mounting hole is a circular hole, and the other is a long hole, thereby forming a sliding connection between the blade mounting seat and the frame member.

[0009] Preferably, a tool for repairing a PEM electrolyzer in the present invention is further configured as follows: the frame member is arranged in a rectangular shape, and the frame member includes a first frame bar, a second frame bar, and a third frame bar and a fourth frame bar arranged in parallel, and the first frame bar and the second frame bar are respectively arranged perpendicular to the third frame bar and the fourth frame bar.

[0010] Preferably, a tool for repairing a PEM electrolyzer in the present invention is further configured as follows: the number of the blade assemblies is two groups, and the two groups of blade assemblies are respectively arranged on the first frame bar and the second frame bar or on the third frame bar and the fourth frame bar.

[0011] Preferably, a tool for repairing a PEM electrolyzer in the present invention is further configured as follows: a first protrusion is provided on the blade mounting seat of one of the two groups of blade assemblies, and a second protrusion is provided on the blade mounting seat of the other group of blade assemblies. The first protrusion and the second protrusion are connected by a connecting mechanism, and the connecting mechanism includes: a connecting screw, a first nut and a second nut. The first protrusion is provided with a second through hole, and the second protrusion is provided with a third through hole. The connecting screw is transversely inserted into the second through hole of the first protrusion and the third through hole of the second protrusion. The first nut is sleeved on the connecting screw segment outside the first protrusion, and the second nut is sleeved on the connecting screw segment outside the second protrusion.

[0012] Preferably, a tool for repairing a PEM electrolyzer in the present invention is further configured as follows: at least one intermediate support beam is provided below the frame member, and the intermediate support beam is connected to the frame member by at least two sets of connecting mechanisms, each set of connecting mechanisms includes: a second vertical screw, a third nut and a fourth nut, the frame member is provided with a third mounting hole matching the second vertical screw, the intermediate support beam is provided with a fourth mounting hole matching the second vertical screw, the second vertical screw is longitudinally passed through the third mounting hole of the frame member and the fourth mounting hole of the intermediate support beam, the third nut is sleeved on the second vertical screw segment above the frame member, and the fourth nut is sleeved on the second vertical screw segment below the intermediate support beam.

[0013] Preferably, the tool for repairing a PEM electrolyzer in the present invention is further configured as follows: a lifting lug is provided on the top of the upper end plate, and the lifting lug is connected to the upper end plate via a threaded connection.

[0014] Preferably, a tool for repairing a PEM electrolyzer in the present invention is further configured as follows: the blade includes a mounting portion cooperating with a blade mounting seat and an insertion portion for inserting into the PEM electrolyzer, the thickness of the mounting portion is greater than the thickness of the insertion portion, and a limiting step portion is provided between the mounting portion and the insertion portion.

[0015] To achieve the above-mentioned purpose, another technical solution adopted by the present invention is: a method for repairing a PEM electrolyzer using a tool, comprising the following steps: A. first, a frame member is sleeved on the PEM electrolyzer, then an upper crossbeam is assembled on the top of the frame member through a spacing adjustment mechanism, and then the upper crossbeam is fixed to the upper end plate of the PEM electrolyzer through a fixing member; B. Then, the height position of the frame member is adjusted by screwing the adjustment nut of the spacing adjustment mechanism. The position of the frame member needs to be adjusted to 8CM to 12CM below the damaged chamber; C. Then, the inner positioning rod is inserted into the positioning hole of each component of the stacked PEM electrolyzer; D. Then, the screws and nuts used to fix the stacked components of the PEM electrolyzer are tightened. E. Then, install the blade assembly on the frame member and insert the blade of the blade assembly above the damaged cell. Adjust the insertion depth of the blade into the PEM electrolyzer by removing the top of the blade by adjusting the bolt on the blade mounting seat and / or sliding the blade mounting seat relative to the frame member. The insertion depth is controlled to be 5 to 15 mm. F. Then, hook the hook of the lifting equipment onto the lifting ear on the top of the upper end plate of the PEM electrolyzer so that the upper cell body of the PEM electrolyzer above the damaged cell is positioned by the tooling and then lifted as a whole. During the lifting process, the internal positioning rod remains in the lower cell body of the PEM electrolyzer below the damaged cell, thereby preventing the position of the lower cell body of the PEM electrolyzer from shifting.

[0016] Preferably, a method for repairing a PEM electrolyzer in the present invention is further configured as follows: in the above step F, after lifting it up a certain distance, the intermediate supporting beam is installed under the frame member through a connecting mechanism, thereby preventing the lowermost chamber of the upper body of the lifted PEM electrolyzer from sagging or falling off.

[0017] Preferably, a method for repairing a PEM electrolyzer in the present invention is further configured as follows: in the above step F, if the inner positioning rod of the upper cell body of the PEM electrolyzer rises together with it during the lifting process, a worker is required to pull down the positioning rod so that the inner positioning rod always remains in the lower cell body of the PEM electrolyzer.

[0018] Compared with the prior art, the present invention has the following beneficial effects: the maintenance tooling of the present invention has a simple structure and is easy to install. After it is installed on the PEM electrolyzer, the upper cell body of the electrolyzer above the damaged chamber can be installed and disassembled as a whole, thereby avoiding the plate displacement problem caused by the piece-by-piece installation in the prior art. In addition, the overall installation also improves maintenance efficiency.

Brief Description of the Drawings

[0019] Figure 1 It is a structural schematic diagram of the maintenance tool in the present invention.

[0020] Figure 2This is a schematic diagram of the exploded structure of the blade assembly in the present invention.

[0021] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.

[0022] Figure 4 A schematic diagram of the structure after the frame member, upper crossbeam and spacing adjustment mechanism are installed on the PEM electrolyzer is disclosed.

[0023] Figure 5 A structural schematic diagram is disclosed in which the frame member is lowered to a position 8cm to 12cm below the damaged chamber by twisting the adjusting nut of the spacing adjustment mechanism.

[0024] Figure 6 A schematic diagram of the structure of inserting the inner positioning rod into the positioning holes of each component of the stacked PEM electrolyzer is disclosed.

[0025] Figure 7 A schematic diagram of the structure after the screws and nuts used to fix the stacked components of the PEM electrolyzer are disassembled is disclosed.

[0026] Figure 8 A schematic diagram of the structure after the blade assembly is installed is disclosed.

[0027] Figure 9 A structural schematic diagram is revealed in which the upper trough body is hoisted and the inner positioning rod is retained in the lower trough body.

[0028] Figure 10 A structural schematic diagram is disclosed in which the middle supporting beam is installed below the frame member through a connecting mechanism.

[0029] Figures 1 to 10 Middle: 1. Frame member, 10. First frame bar, 11. Second frame bar, 12. Third frame bar, 13. Fourth frame bar, 14. Third mounting hole, 2. Upper crossbeam, 20. Fixing member, 3. Blade assembly, 30. Blade mounting seat, 300. Slot, 301. Adjusting bolt, 302. Anti-slip bolt, 303. First mounting hole, 304. First protrusion, 3040. Second through hole, 305. Second protrusion, 3050. Third through hole, 31. Blade, 310. Mounting portion, 311. Insertion portion, 31 2. Limiting step, 313. Long hole, 32. Connecting piece, 4. PEM electrolyzer, 40. Upper end plate, 400. Lifting ear, 41. Upper body of PEM electrolyzer, 42. Lower body of PEM electrolyzer, 5. Spacing adjustment mechanism, 50. First vertical screw, 51. Adjusting nut, 6. Connecting mechanism, 60. Connecting screw, 61. First nut, 7. Intermediate supporting beam, 70. Fourth mounting hole, 8. Connecting mechanism, 80. Second vertical screw, 81. Third nut, 82. Fourth nut, 9. Inner positioning rod. [Specific implementation method]

[0030] The following is a further detailed description of the tooling and method for repairing a PEM electrolyzer according to the present invention through specific embodiments.

[0031] Ginseng Figures 1 to 3 As shown, a tool for repairing a PEM electrolyzer comprises: a frame member 1, at least two upper crossbeams 2 arranged above the frame member 1, and at least two groups of blade assemblies 3 installed on the frame member 1. In this embodiment, the frame member 1 is arranged in a rectangular shape, and the frame member 1 includes a first frame bar 10, a second frame bar 11, and a third frame bar 12 and a fourth frame bar 13 arranged in parallel. The first frame bar 10 and the second frame bar 11 are respectively arranged perpendicular to the third frame bar 12 and the fourth frame bar 13. The number of the blade assemblies 3 is two groups, and the two groups of blade assemblies 3 are respectively arranged on the first frame bar 10 and the second frame bar 11 or on the third frame bar 12 and the fourth frame bar 13 (that is, the two groups of blade assemblies 3 are respectively installed on two symmetrical sides). Of course, in other embodiments, the number of the blade assemblies 3 can also be three or four groups, and all of them can implement the present invention. In this embodiment, the number of the upper crossbeams 2 is two. Of course, in other embodiments, the number of the upper crossbeams 2 can also be three or four, and all of these can implement the present invention. The upper crossbeam 2 is fixed to the upper end plate 40 of the PEM electrolyzer 4 by a fixing member 20. In this embodiment, the fixing member 20 is a bolt, and the side wall of the upper end plate 40 is provided with a threaded hole that matches the bolt. Of course, in other embodiments, the upper crossbeam 2 is L-shaped, and a threaded hole is provided on the top wall of the upper end plate 40, which can also implement the present invention. The top of the upper end plate 40 is provided with a lifting lug 400 for lifting, and the lifting lug 400 is connected to the upper end plate 40 by a threaded connection.

[0032] The upper crossbeam 2 and the frame member 1 are connected by at least two groups of spacing adjustment mechanisms 5. In the present embodiment, the number of the spacing adjustment mechanisms 5 is two groups. Of course, in other embodiments, the number of the spacing adjustment mechanisms 5 can also be three groups or four groups or more, and the present invention can also be implemented. In the present embodiment, each group of spacing adjustment mechanisms 5 includes: a first vertical screw 50 and an adjustment nut 51. The upper crossbeam 2 is provided with a first through hole (not shown), and the first vertical screw 50 is passed through the first through hole. The bottom of the first vertical screw 50 is connected to the frame member 1 (which can be a welding connection or a threaded connection or a fixing connection), and the adjustment nut 51 is sleeved on the first vertical screw segment above the upper crossbeam 2. The upper and lower positions of the frame member 1 can be adjusted by screwing the adjusting nut 51. Of course, in other embodiments, the top of the first vertical screw 50 can also be connected to the upper beam 2 (it can be a welding connection, a threaded connection, or a fixing connection), and a first through hole is opened on the frame member 1, so that the first vertical screw 50 is passed through the first through hole of the frame member 1, and the adjusting nut 51 is sleeved on the first vertical screw segment below the frame member 1. The upper and lower positions of the frame member 1 can also be adjusted by screwing the adjusting nut 51.

[0033] Each blade assembly 3 includes a blade mounting seat 30 and a blade 31. The blade mounting seat 30 is connected to the frame member 1 via a connector 32. The blade 31 includes a mounting portion 310 that cooperates with the blade mounting seat 30 and an insertion portion 311 for inserting into the PEM electrolyzer 4. The thickness of the mounting portion 310 is greater than the thickness of the insertion portion 311. A limiting step 312 is provided between the mounting portion 310 and the insertion portion 311. The function of the limiting step 312 is to limit the depth of the insertion portion 311 inserted into the PEM electrolyzer 4. The blade structure of the present invention is designed to have a structure of varying thickness so that the insertion portion 311 can be designed to be very thin to facilitate its insertion, while the thicker mounting portion 310 can also provide the blade with a certain structural strength. A slot 300 is provided on one side of the blade mount 30, into which the blade 31 is inserted. An adjustment bolt 301 for adjusting the insertion depth of the blade 31 and an anti-detachment bolt 302 for preventing the blade 31 from detaching from the blade mount 30 are provided on the blade mount 30. The blade 31 is provided with an elongated hole 313 that cooperates with the anti-detachment bolt 302. The connecting member 32 between the blade mount 30 and the frame member 1 is a bolt and a nut. The blade mount 30 is provided with a first mounting hole 303 that cooperates with the bolt, and the frame member 1 is provided with a second mounting hole (not shown) that cooperates with the bolt. One of the first mounting hole 303 and the second mounting hole is a circular hole, and the other is an elongated hole, thereby forming a slidable connection between the blade mount 30 and the frame member 1. That is, in the present invention, not only can the insertion depth of the blade 31 be adjusted by the adjusting bolt 301 on the blade mounting seat 30, but the insertion depth of the blade 31 can also be adjusted by the sliding displacement of the blade mounting seat 30 relative to the frame member 1, so that the insertion depth of the blade 31 has a larger adjustable range.

[0034] The blade mounting seat 30 of one of the two groups of blade assemblies 3 is provided with a first protrusion 304, and the blade mounting seat 30 of the other group of blade assemblies 3 is provided with a second protrusion 305. The first protrusion 304 and the second protrusion 305 are connected by a connecting mechanism 6. The connecting mechanism 6 includes: a connecting screw 60, a first nut 61 and a second nut (not shown). The first protrusion 304 is provided with a second through hole 3040, and the second protrusion 305 is provided with a third through hole 3050. The connecting screw 60 is transversely inserted into the second through hole 3040 of the first protrusion 304 and the third through hole 3050 of the second protrusion 305. The first nut 61 is sleeved on the connecting screw segment outside the first protrusion 304, and the second nut is sleeved on the connecting screw segment outside the second protrusion 305. The setting of the connecting mechanism 6 enhances the structural strength of the two sets of blade assemblies 3, and the connecting mechanism 6 adopts a connecting structure of a screw and a nut. While enhancing the structural strength, it will not affect the insertion depth of the adjustment blade 31. When the blade mounting seat 30 slides relative to the frame member 1, the nut on the connecting mechanism 6 can be turned for adaptive adjustment.

[0035] In order to prevent the lowermost chamber of the upper body 41 of the PEM electrolyzer from sagging or falling off, at least one intermediate support beam 7 is provided below the frame member 1, and the intermediate support beam 7 is connected to the frame member 1 by at least two sets of connecting mechanisms 8. In this embodiment, two intermediate support beams 7 are provided below the frame member 1, and the intermediate support beam 7 is connected to the frame member 1 by two sets of connecting mechanisms 8. Each set of connecting mechanisms 8 includes: a second vertical screw 80, a third nut 81 and a fourth nut 82. The frame member 1 is provided with a third mounting hole 14 that cooperates with the second vertical screw 80, and the intermediate support beam 7 is provided with a fourth mounting hole 70 that cooperates with the second vertical screw 80. The second vertical screw 80 is longitudinally inserted into the third mounting hole 14 of the frame member 1 and the fourth mounting hole 70 of the intermediate support beam 7. The third nut 81 is sleeved on the second vertical screw segment above the frame member 1, and the fourth nut 82 is sleeved on the second vertical screw segment below the intermediate support beam 7.

[0036] A method for repairing a PEM electrolyzer using a tool comprises the following steps: A. Figure 4 First, the frame member 1 is mounted on the PEM electrolyzer 4, and then the upper crossbeam 2 is assembled on the upper portion of the frame member 1 through the spacing adjustment mechanism 5, and then the upper crossbeam 2 is fixed to the upper end plate 40 of the PEM electrolyzer 4 through the fixing member 20; B. Please refer to Figure 5 Then, adjust the height of the frame member 1 by screwing the adjustment nut 51 of the spacing adjustment mechanism 5. The frame member 1 needs to be adjusted to 8CM to 12CM below the damaged chamber. Figure 6, then insert the inner positioning rod 9 into the positioning holes of the stacked components of the PEM electrolyzer 4; D, please refer to Figure 7 , then remove the screws and nuts used to fix the stacked components of the PEM electrolyzer; E, please refer to Figure 8 Then, install the blade assembly 3 on the frame member 1, and insert the blade 31 of the blade assembly 3 into the damaged chamber. Use the adjustment bolt 301 on the blade mounting seat 30 to remove the blade 31 and / or slide the blade mounting seat 30 relative to the frame member 1 to adjust the insertion depth of the blade 31 into the PEM electrolyzer 4. The insertion depth is controlled to be 5 to 15 mm. Figure 9 Then, the hook of the lifting equipment is hooked onto the lifting ear 400 on the top of the upper end plate 40 of the PEM electrolyzer 4, so that the upper tank body 41 of the PEM electrolyzer above the damaged cell is positioned by the tooling and then lifted as a whole. During the lifting process, the internal positioning rod 9 remains in the lower tank body 42 of the PEM electrolyzer below the damaged cell, thereby preventing the position of the lower tank body 42 of the PEM electrolyzer from shifting; please refer to Figure 10 After lifting the upper body 41 of the PEM electrolyzer, the intermediate support beam 7 is installed below the frame member 1 through the connecting mechanism 8 to prevent the lowermost chamber of the upper body 41 of the PEM electrolyzer from sagging or falling off. If the inner positioning rod 9 rises with the upper body 41 of the PEM electrolyzer during the lifting process, the worker needs to pull down the positioning rod 9 to ensure that the inner positioning rod 9 remains in the lower body 42 of the PEM electrolyzer.

[0037] In summary, the maintenance tooling of the present invention has a simple structure and is easy to install. After it is installed on the PEM electrolyzer, the upper tank body of the electrolyzer above the damaged chamber can be installed and disassembled as a whole, thereby avoiding the plate displacement problem caused by the piece-by-piece installation in the prior art. In addition, the overall installation also improves maintenance efficiency.

[0038] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some embodiments of its application, and are not intended to limit the present invention. It should be noted that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A tool for repairing a PEM electrolyzer, characterized by: include: A frame member, at least two upper beams arranged above the frame member and at least two groups of blade assemblies installed on the frame member, the upper beams are fixed to the upper end plate of the PEM electrolyzer through fixing members, the upper beams and the frame member are connected by at least two groups of spacing adjustment mechanisms, each group of blade assemblies includes a blade mounting seat and a blade, and the blade mounting seat and the frame member are connected by a connecting member.

2. A tool for repairing a PEM electrolyzer according to claim 1, characterized in that: Each set of spacing adjustment mechanisms includes: a first vertical screw and an adjustment nut. The upper beam is provided with a first through hole. The first vertical screw is passed through the first through hole. The bottom of the first vertical screw is connected to the frame member. The adjustment nut is sleeved on the first vertical screw section above the upper beam.

3. The tool for repairing a PEM electrolyzer according to claim 1, characterized in that: A slot is provided on one side of the blade mounting seat, and the blade is inserted into the slot. The blade mounting seat is provided with an adjustment bolt for adjusting the insertion depth of the blade and an anti-detachment bolt for preventing the blade from detaching from the blade mounting seat. The blade is provided with a long hole that matches the anti-detachment bolt.

4. A tool for repairing a PEM electrolyzer according to claim 1 or 3, characterized in that: The connecting parts between the blade mounting seat and the frame member are bolts and nuts. The blade mounting seat is provided with a first mounting hole that matches the bolt, and the frame member is provided with a second mounting hole that matches the bolt. One of the first mounting hole and the second mounting hole is a round hole, and the other is a long hole, so that a sliding connection is formed between the blade mounting seat and the frame member.

5. The tool for repairing a PEM electrolyzer according to claim 1, characterized in that: The frame member is arranged in a rectangular shape, and includes a first frame bar, a second frame bar, and a third frame bar and a fourth frame bar arranged in parallel. The first frame bar and the second frame bar are respectively arranged perpendicular to the third frame bar and the fourth frame bar.

6. A tool for repairing a PEM electrolyzer according to claim 5, characterized in that: There are two groups of blade assemblies, and the two groups of blade assemblies are respectively arranged on the first border strip and the second border strip or on the third border strip and the fourth border strip.

7. A tool for repairing a PEM electrolyzer according to claim 6, characterized in that: The blade mounting seat of one of the two groups of blade assemblies is provided with a first protrusion, and the blade mounting seat of the other group of blade assemblies is provided with a second protrusion. The first protrusion and the second protrusion are connected by a connecting mechanism, and the connecting mechanism includes: a connecting screw, a first nut and a second nut. The first protrusion is provided with a second through hole, and the second protrusion is provided with a third through hole. The connecting screw is transversely inserted into the second through hole of the first protrusion and the third through hole of the second protrusion. The first nut is sleeved on the connecting screw segment outside the first protrusion, and the second nut is sleeved on the connecting screw segment outside the second protrusion.

8. The tool for repairing a PEM electrolyzer according to claim 6, characterized in that: At least one intermediate supporting beam is provided below the frame member, and the intermediate supporting beam is connected to the frame member by at least two groups of connecting mechanisms, each group of connecting mechanisms includes: a second vertical screw, a third nut and a fourth nut, the frame member is provided with a third mounting hole matching the second vertical screw, the intermediate supporting beam is provided with a fourth mounting hole matching the second vertical screw, the second vertical screw is longitudinally passed through the third mounting hole of the frame member and the fourth mounting hole of the intermediate supporting beam, the third nut is sleeved on the second vertical screw segment above the frame member, and the fourth nut is sleeved on the second vertical screw segment below the intermediate supporting beam.

9. The tool for repairing a PEM electrolyzer according to claim 1, characterized in that: A lifting lug is provided on the top of the upper end plate, and the lifting lug is connected to the upper end plate via a thread.

10. The tool for repairing a PEM electrolyzer according to claim 1, characterized in that: The blade includes a mounting portion matched with the blade mounting seat and an inserting portion for inserting into the PEM electrolyzer. The thickness of the mounting portion is greater than that of the inserting portion. A limiting step portion is provided between the mounting portion and the inserting portion.

11. A method for repairing a PEM electrolyzer using the tooling according to any one of claims 1 to 10, characterized in that: The steps include: A. First, put the frame piece on the PEM electrolyzer, then assemble the upper crossbeam on the top of the frame piece through the spacing adjustment mechanism, and then fix the upper crossbeam to the upper end plate of the PEM electrolyzer through the fixing piece; B. Then adjust the height of the frame by turning the adjustment nut of the spacing adjustment mechanism. The frame needs to be adjusted to 8cm to 12cm below the damaged chamber. C. Then insert the inner positioning rod into the positioning hole of each component of the stacked PEM electrolyzer; D. Then remove the screws and nuts used to fix the stacked components of the PEM electrolyzer; E. Then, install the blade assembly on the frame member and insert the blade of the blade assembly above the damaged cell. Use the adjustment bolt on the blade mounting seat to push the blade up and / or slide the blade mounting seat relative to the frame member to adjust the insertion depth of the blade into the PEM electrolyzer. The insertion depth is controlled to be 5 to 15 mm. F. Then hook the hook of the lifting equipment onto the lifting ear on the top of the upper end plate of the PEM electrolyzer, so that the upper cell body of the PEM electrolyzer above the damaged cell is positioned by the tooling and then lifted as a whole. During the lifting process, the internal positioning rod remains in the lower cell body of the PEM electrolyzer below the damaged cell, thereby preventing the position of the lower cell body of the PEM electrolyzer from shifting.

12. A method for repairing a PEM electrolyzer according to claim 11, characterized in that: In the above step F, after lifting for a certain distance, the middle supporting beam is installed below the frame member through the connecting mechanism, so as to prevent the lowermost chamber of the upper body of the lifted PEM electrolyzer from sagging or falling off.

13. A method for repairing a PEM electrolyzer according to claim 11, characterized in that: In the above step F, if the inner positioning rod rises along with the upper body of the PEM electrolyzer during the lifting process, a worker needs to pull down the positioning rod so that the inner positioning rod always remains in the lower body of the PEM electrolyzer.

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