Fastening structure for a pem electrolyzer

Abstract

The utility model relates to PEM electrolytic cell technical field discloses a fastening structure for PEM electrolytic cell, including electrolytic cell main part, its one side is provided with the bolt group through to the other side, the bolt group includes: diagonal bolt and middle bolt, diagonal bolt is located electrolytic cell main part four corners and presents diagonal line arrangement, in the fastening use of electrolytic cell, through the effect of abutment piece two, can push abutment piece one and tightly push diagonal spring on diagonal bolt surface, under the synergistic effect that abutment piece one and abutment piece two mutually abut, even if middle nut appears loose situation, diagonal spring on diagonal bolt surface still can maintain its initial fastening state under the joint action of diagonal spring and middle spring, the diagonal line position of electrolytic cell main part will keep good fastening state at this time, compared with only relying on the fastening effect of middle bolt and middle nut, this structure can improve the stability of electrolytic cell main part itself more, provides reliable guarantee for the operation use of electrolytic cell main part.

Description

Technical Field

[0001] This utility model belongs to the field of PEM electrolytic cell technology, and specifically relates to a fastening structure for PEM electrolytic cells. Background Technology

[0002] With the energy crisis and environmental pollution becoming increasingly severe, developing renewable energy and pursuing sustainable development have become a research focus for scholars worldwide. Hydrogen energy, with its clean and efficient characteristics, is widely recognized as the most promising energy carrier for the future. Among the various hydrogen production technologies currently available, using electricity generated from renewable energy sources to electrolyze water is the most mature and promising technology, considered the best path to a hydrogen economy. Water electrolysis is a process that uses electricity to decompose water into hydrogen and oxygen. Unlike traditional alkaline water electrolysis, PEM (polyelectrolyte membrane) water electrolysis technology uses pure water as the electrolyte, with the PEM membrane acting as both an electrolyte and a separator. When the water electrolyzer is working, hydrated protons on the membrane are transferred between the anode and cathode through the interface region, resulting in an acidic water electrolysis reaction. PEM water electrolysis for hydrogen production has advantages such as high efficiency and environmental friendliness, and is considered a major future method for hydrogen production.

[0003] Currently, Chinese utility model patent application CN 222631568 U discloses a novel fastening structure for a PEM electrolytic cell, including an anode end plate, a fastening bolt group on the left side of the anode end plate, an anode flow channel plate on the right side of the anode end plate, a test element on the right side of the anode flow channel plate, and a cathode flow channel plate on the right side of the test element. Compared with the prior art, this utility model has the following advantages: by setting an elongated hole, when all the fastening bolts fall into the step of the elongated hole during installation, the fastening bolt group will not slip or rotate during installation, and the specified torque output can be directly achieved by using a torque wrench for the nut. By setting a disc spring, sufficient preload can be provided to ensure that the distance between the anode end plate and the cathode end plate is basically consistent. When the fastening bolts become loose, the disc spring can release some potential energy and maintain the pressure between the nuts to achieve the sealing requirements.

[0004] In the above-disclosed structural scheme, the pre-tension force of the disc springs ensures that the distance between the anode and cathode end plates is basically consistent. However, under this structure, if some disc springs deform and extend while others remain in a compressed pre-tensioned state, it will cause an imbalance of forces between the anode and cathode end plates, which will affect the performance of the PEM electrolytic cell. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a fastening structure for PEM electrolytic cells.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a fastening structure for PEM electrolytic cells, comprising an electrolytic cell body, wherein a bolt group is provided on one side and extends to the other side; The bolt group includes: diagonal bolts and center bolts; The diagonal bolts are located at the four corners of the electrolytic cell body and are arranged diagonally, and the surfaces of the ends of multiple diagonal bolts are jointly fitted with an abutment. The central bolt is located between two adjacent diagonal bolts, and the surfaces of the ends of multiple central bolts are jointly fitted with abutment member two.

[0007] Preferably, one side of the first abutment is in contact with the main body of the electrolytic cell, and the second abutment is located on the side of the first abutment that is away from the main body of the electrolytic cell.

[0008] Preferably, on the side of the abutment member facing the electrolytic cell body, a diagonal spring and a diagonal nut are sequentially provided. The diagonal spring and the diagonal nut are together sleeved on the surface of the diagonal bolt, and the diagonal nut and the diagonal bolt are threaded together.

[0009] Preferably, the end ear plate of the first abutment member is provided with a sleeve hole for through-fitting with the diagonal bolt, and the middle part of the first abutment member is recessed towards the electrolytic cell body.

[0010] Preferably, a central spring and a central nut are sequentially provided on the side of the abutment member two away from the abutment member one. The central spring and the central nut are together sleeved on the surface of the central bolt, and the central nut and the central bolt are threaded together.

[0011] Preferably, the end ear plate of the second abutment member is provided with a second sleeve hole for through-fitting with the middle bolt, the middle part of the second abutment member protrudes from the side opposite to the first abutment plate, and the recess of the first abutment member and the protrusion of the second abutment member are in contact and fit each other.

[0012] Preferably, the abutment member one has a positioning groove at equal intervals on the side near the abutment member two, and the abutment member two has a positioning bar at equal intervals snapped on the side near the abutment member two, and the positioning groove and the positioning bar are positioned and snapped together.

[0013] In summary, this utility model has the following beneficial effects: 1. During the fastening of the electrolytic cell, the action of the second abutment component pushes the first abutment component against the diagonal spring on the surface of the diagonal bolt. Under the synergistic action of the first and second abutments, even if the central nut becomes loose, the diagonal nut on the surface of the diagonal bolt can still maintain its initial tightness under the combined action of the diagonal spring and the central spring. At this time, the diagonal position of the electrolytic cell body will maintain a good tightness. Compared to relying solely on the fastening action of the central bolt and nut, this structure better enhances the stability of the electrolytic cell body itself, providing a reliable guarantee for the operation and use of the electrolytic cell body. 2. During the approaching contact of the second abutment to the first abutment, the protruding part of the second abutment and the recessed part of the second abutment abut each other and form a tight contact, and the positioning crossbar will be inserted into the positioning cross groove in time. Finally, in the tight contact between the two, the positioning crossbar and the positioning cross groove are completed. This structure will cooperate with the first abutment and the second abutment to form a positioning aid. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is an exploded view of the first and second abutment parts of this utility model; Figure 3 This is a schematic cross-sectional view of the abutment component of this utility model; Figure 4 This is an exploded view of the abutment part 1 and the diagonal bolt used in conjunction with this utility model; Figure 5 This is an exploded view of the abutment part 2 and the middle bolt of this utility model in use.

[0015] Figure label: 100. Electrolytic cell body; 200. Bolt set; 201. Diagonal bolts; 202. Center bolts; 300. Abutment component one; 301. Sleeve hole one; 400, diagonal spring; 401, diagonal nut; 500. Abutment part two; 501. Sleeve hole two; 600, central spring; 601, central nut; 700, Positioning groove; 701, Positioning bar. Detailed Implementation

[0016] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0017] The specific embodiments of this utility model are described below with reference to the accompanying drawings: Example

[0018] refer to Figures 1-5 For fastening structure of PEM electrolytic cell, including electrolytic cell body 100, one side of which is provided with bolt group 200 extending to the other side; Bolt assembly 200 includes: diagonal bolts 201 and center bolts 202; The diagonal bolts 201 are located at the four corners of the electrolytic cell body 100 and are arranged diagonally, and the surfaces of the ends of multiple diagonal bolts 201 are jointly fitted with abutment members 300. The central bolt 202 is located between two adjacent diagonal bolts 201, and the surfaces of the ends of multiple central bolts 202 are jointly fitted with abutment member 2 500.

[0019] Specifically, during the fastening of the electrolytic cell, the action of the second abutment 500 pushes the first abutment 300 to press against the diagonal spring 401 on the surface of the diagonal bolt 201. Under the synergistic action of the first abutment 300 and the second abutment 500, even if the central nut 601 becomes loose, the diagonal nut 401 on the surface of the diagonal bolt 201 can still maintain its initial fastening state under the combined action of the diagonal spring 400 and the central spring 600. At this time, the diagonal position of the electrolytic cell body 100 will maintain a good fastening state. Compared to relying solely on the fastening action of the central bolt 202 and the central nut 601, this structure can better improve the stability of the electrolytic cell body 100 itself, providing a reliable guarantee for the operation and use of the electrolytic cell body 100.

[0020] One side of the first abutment 300 is in contact with the main body 100 of the electrolytic cell, and the second abutment 500 is located on the side of the first abutment 300 away from the main body 100 of the electrolytic cell. On the side of the first abutment 300 facing the main body 100 of the electrolytic cell, a diagonal spring 400 and a diagonal nut 401 are arranged in sequence. The diagonal spring 400 and the diagonal nut 401 are together sleeved on the surface of the diagonal bolt 201, and the diagonal nut 401 and the diagonal bolt 201 are threaded together. The end ear plate of the first abutment 300 is provided with a sleeve hole 301 that is sleeved and mates with the diagonal bolt 201. The middle part of the first abutment 300 is recessed towards the main body 100 of the electrolytic cell.

[0021] Specifically, during assembly, diagonal nuts 401 and diagonal springs 400 are sequentially fitted onto the surfaces of multiple diagonal bolts 201. The diagonal nuts 401 are tightened by threads and advance onto the surfaces of the diagonal bolts 201 until they are in close contact with the electrolytic cell body 100. Subsequently, through the fitting holes 301 of the abutment member 300, the abutment member 300 is simultaneously fitted onto the multiple diagonal bolts 201. The abutment member 300 and the electrolytic cell body 100 form an abutment fit, which can cooperate with the diagonal bolts 201 to ensure the stability of the distance between the two end plates of the electrolytic cell body 100. At the same time, the diagonal springs 400 are in a pre-tightened state. Under the combined action of the above structures, the diagonal nuts 401 are fastened and prevented from falling off the surfaces of the diagonal bolts 201, thereby ensuring the operational stability of the electrolytic cell body 100 during use.

[0022] A central spring 600 and a central nut 601 are sequentially arranged on the side of the abutment part 2 500 away from the abutment part 1 300. The central spring 600 and the central nut 601 are together sleeved on the surface of the central bolt 202, and the central nut 601 and the central bolt 202 are threaded together. The end ear plate of the abutment part 2 500 is provided with a sleeve hole 2 501 that is sleeved through the central bolt 202. The middle part of the abutment part 2 500 protrudes from the side away from the abutment plate 1, and the recess of the abutment part 1 300 and the protrusion of the abutment part 2 500 are in contact and fit together.

[0023] Specifically, the abutment part 2 500 is first fitted onto multiple central bolts 202 through the fitting hole 2 501 of the abutment part 2 500. Then, the central spring 600 and the central nut 601 are sequentially fitted onto the surface of the multiple central bolts 202. As the multiple central nuts 601 are tightened sequentially, the central nuts 601 are tightened by threads and advance onto the surface of the central bolts 202 until the abutment part 2 500 is pressed by the central spring 600 and makes it contact the abutment part 300. The protruding part of the abutment part 2 500 and the recessed part of the abutment part 2 500 abut against each other and form a tight contact.

[0024] The first abutment 300 has a positioning transverse groove 700 at equal intervals on the side near the second abutment 500, and the second abutment 500 has a positioning transverse bar 701 arranged at equal intervals snapped on the side near the second abutment 500, and the positioning transverse groove 700 and the positioning transverse bar 701 are positioned and snapped together.

[0025] Specifically, during the approaching contact of the second abutment 500 to the first abutment 300, its positioning crossbar 701 will be inserted into the positioning cross groove 700 in a timely manner. Finally, in the close contact between the two, the positioning crossbar 701 and the positioning cross groove 700 are completed. This structure will cooperate with the first abutment 300 and the second abutment 500 to form a positioning aid.

[0026] The working principle of this utility model is as follows: In the fastening of the electrolytic cell body 100, the bolt group 200 is first inserted into the appropriate position inside the electrolytic cell body 100 as required. The diagonal bolts 201 are located at the four corners of the electrolytic cell body 100 and are connected to each other in a diagonal relationship, while the middle bolt 202 is located between two adjacent diagonal bolts 201. Subsequently, diagonal nuts 401 and diagonal springs 400 are sequentially fitted onto the surfaces of multiple diagonal bolts 201. The diagonal nuts 401 are tightened by threads and advance onto the surfaces of the diagonal bolts 201 until they are in close contact with the electrolytic cell body 100. Then, through the fitting hole 301 of the first abutment 300, the first abutment 300 is simultaneously fitted onto the multiple diagonal bolts 201. Next, the second abutment 500 is taken out and simultaneously fitted onto the multiple central bolts 202 through the fitting hole 501. The protruding part of the second abutment 500 and the recessed part of the second abutment 500 abut against each other and form a tight contact.

[0027] Next, a central spring 600 and a central nut 601 are sequentially fitted onto the end of the central bolt 202 on one side of the second abutment 500. As the central nut 601 tightens onto the surface of the central bolt 202, the second abutment 500 gradually moves closer to the first abutment 300, ultimately achieving a positioning insertion fit between the positioning crossbar 701 and the positioning groove 700. This structure, in conjunction with the first abutment 300 and the second abutment 500, forms a positioning auxiliary function. Under the action of the second abutment 500, this structure can push the first abutment 300 to press against the diagonal nut 401 on the surface of the diagonal bolt 201. Under the synergistic action of the first abutment 300 and the second abutment 500, even if the central nut 601 becomes loose, the diagonal nut 401 on the surface of the diagonal bolt 201 can still maintain its initial tightness under the combined action of the diagonal spring 400 and the central spring 600.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A fastening structure for PEM electrolytic cells, characterized in that: include: The main body of the electrolytic cell (100) has a bolt group (200) on one side that extends to the other side. The bolt assembly (200) includes: diagonal bolts (201) and center bolts (202); The diagonal bolts (201) are located at the four corners of the electrolytic cell body (100) and are arranged diagonally, and the surfaces of the ends of multiple diagonal bolts (201) are fitted with abutment member (300). The central bolt (202) is located between two adjacent diagonal bolts (201), and the surfaces of the ends of the multiple central bolts (202) are jointly fitted with abutment part two (500).

2. The fastening structure for PEM electrolytic cells according to claim 1, characterized in that: One side of the first abutment (300) is in contact with the main body of the electrolytic cell (100), and the second abutment (500) is located on the side of the first abutment (300) away from the main body of the electrolytic cell (100).

3. The fastening structure for PEM electrolytic cells according to claim 1, characterized in that: On the side of the abutment member 1 (300) facing the electrolytic cell body (100), a diagonal spring (400) and a diagonal nut (401) are sequentially provided. The diagonal spring (400) and the diagonal nut (401) are together sleeved on the surface of the diagonal bolt (201), and the diagonal nut (401) and the diagonal bolt (201) are threaded together.

4. The fastening structure for PEM electrolytic cells according to claim 3, characterized in that: The end ear plate of the abutment member (300) is provided with a sleeve hole (301) that is fitted through to the diagonal bolt (201), and the middle part of the abutment member (300) is recessed towards the electrolytic cell body (100).

5. The fastening structure for PEM electrolytic cells according to claim 4, characterized in that: The abutment part 2 (500) is provided with a central spring (600) and a central nut (601) on the side away from the abutment part 1 (300). The central spring (600) and the central nut (601) are together sleeved on the surface of the central bolt (202), and the central nut (601) and the central bolt (202) are threaded together.

6. The fastening structure for PEM electrolytic cells according to claim 5, characterized in that: The end ear plate of the second abutment (500) is provided with a sleeve hole (501) that is fitted through and cooperates with the middle bolt (202). The middle part of the second abutment (500) protrudes from the side opposite to the first abutment plate, and the recess of the first abutment (300) and the protrusion of the second abutment (500) are in contact and fit together.

7. The fastening structure for PEM electrolytic cells according to claim 1, characterized in that: The first abutment (300) has a positioning groove (700) at equal intervals on the side near the second abutment (500), and the second abutment (500) has a positioning bar (701) at equal intervals snapped on the side near the second abutment (500), and the positioning groove (700) and the positioning bar (701) are positioned and snapped together.

Images