Fixing device for AEM electric pile sealing performance test

Abstract

The utility model discloses a fixing device for an AEM electric pile sealing performance test. The fixing device comprises a workbench, the device comprises a workbench, two groups of stack side fixing devices are symmetrically arranged on the workbench, two feeding slide rails are arranged between the two groups of stack side fixing devices, the two feeding slide rails are parallel to each other and fixedly mounted on the surface of the workbench, and the feeding slide rails are arranged in the front-back direction; the feeding sliding rail is connected with a feeding table in a sliding manner through a sliding block; the galvanic pile side surface fixing device comprises a mounting bracket, a lower fixing clamp and an upper fixing clamp; according to the utility model, the slide rail is matched with the feeding table to push the galvanic pile, so that the conveying process is stable, and meanwhile, when the galvanic pile is fixed, the galvanic pile side surface fixing devices which are symmetrically arranged are adopted to fix the side surface of the galvanic pile, so that the stability of the galvanic pile during testing is ensured.

Description

Technical Field

[0001] This utility model relates to the field of airtightness testing, specifically a fixing device for AEM stack sealing testing. Background Technology

[0002] AEM water electrolysis is an anion exchange membrane water electrolysis hydrogen production technology. Its principle is to use anion exchange membrane as an electrolyte to produce hydrogen gas by electrolyzing water. The main structure consists of anion exchange membrane and two transition metal catalytic electrodes. Generally, pure water or low-concentration alkaline solution is used as the electrolyte, and cost-effective non-precious metal catalysts and anion exchange membranes are used.

[0003] For example, our company's earlier patent application, authorized publication number CN118345402B, discloses an integrated AEM water electrolysis hydrogen production device, relating to the field of water electrolysis hydrogen production technology. It includes a hydrogen production component, which comprises a base plate with two collection components on its top. In use, oxygen and hydrogen enter their respective collection bottles through two collection pipes and two inlet pipes. During hydrogen collection, a temperature sensor detects the temperature, allowing operators to monitor the hydrogen temperature on the control system display. The hydrogen then enters a cooler, where a cooling medium removes heat, thus cooling the hydrogen. Next, the hydrogen passes through a heat pipe; the insulation material absorbs residual heat, which is then transferred to the outside via the heat pipe, further reducing the hydrogen temperature and preventing the collection bottles from overheating during collection, which could affect storage and processing.

[0004] In the aforementioned patent, the long-term stability of the electrolyzer body (electrolyte stack) in the AEM water electrolysis hydrogen production equipment determines its service life under actual working conditions, but performance degradation such as gas leakage will seriously deteriorate its service life; in particular, gas leakage of the electrolyte stack under high back pressure conditions in the power generation system will significantly reduce its service life; therefore, it is necessary to test the electrolyte stack during the production process.

[0005] In the prior art, there are also some devices used to check the airtightness of fuel cell stacks. For example, the fuel cell stack airtightness testing device compatible with multiple models disclosed in authorization announcement number CN218628854U relates to the field of fuel cell production equipment technology, including a mounting base plate, a precise positioning device, a reverse support device, a support rod, a mounting top plate, a displacement device, and a sealing device. This utility model is applied to the airtightness testing of fuel cell stacks, and can realize the precise positioning, automatic sealing, and automatic testing of fuel cell stacks to meet the needs of mass production.

[0006] The aforementioned patents are highly flexible, and the coordinated use of the displacement device and the plugging drive device can be compatible with plugging tests of fuel cell stacks of various lengths and heights. The plugging fixtures of different models can be quickly replaced, and they can be compatible with plugging tests of various specifications of electric plugging ports. At the same time, the application of this utility model can automatically complete the automatic plugging and automatic airtightness testing of fuel cell stacks of different specifications, greatly saving labor input. Although the aforementioned patents have wide applicability, because the fuel cell stacks used by our company are relatively tall, during testing, the fuel cell stacks need to be placed vertically, and the aforementioned patents lack a support (fixing) structure for the sides of the fuel cell stacks, making the fuel cell stacks prone to tipping over during testing.

[0007] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0008] The purpose of this invention is to provide a fixing device for AEM stack sealing test to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A fixing device for AEM fuel cell stack sealing test includes a workbench; the workbench is provided with fuel cell stack side fixing devices, and two sets of fuel cell stack side fixing devices are symmetrically arranged. Two feeding slide rails are arranged between the two sets of fuel cell stack side fixing devices. The two feeding slide rails are parallel to each other and fixedly installed on the surface of the workbench, and are arranged along the front-back direction. A feeding platform is slidably connected to the feeding slide rails via a slider. The fuel cell stack side fixing device includes a mounting bracket, a lower fixing clamp, and an upper fixing clamp; a bottom fixing cylinder and a top fixing cylinder are fixedly installed on the outer side of the mounting bracket. The bottom fixing cylinder and the top fixing cylinder... The output shaft passes through the mounting side plate and is fixedly installed with a lower fixing clamp and an upper fixing clamp respectively; the top of the worktable is also fixedly installed with a top plate by a column, and a top cylinder is vertically fixedly installed on the top of the top plate. The output shaft of the top cylinder passes through the top plate and is fixedly connected to an upper fixing plate; an upper fixing block is also fixedly installed at the bottom of the upper fixing plate, wherein the interior of the upper fixing block is hollow, and several clearance grooves are also opened on the side of the upper fixing block; a plug cylinder is also fixedly installed on the top of the upper fixing plate. There are four plug cylinders in total, and the four plug cylinders are independently controlled; the output shaft of the plug cylinder passes through the upper fixing plate and is fixedly connected to a plug.

[0011] Furthermore, a handle is fixedly installed at the front end of the feeding platform to facilitate the operator to push the feeding platform.

[0012] Furthermore, the top of the feeding platform is provided with an octagonal placement groove for fitting the lower end plate of the fuel cell stack, and the bottom of the placement groove is provided with eight clearance holes in a circular array; the clearance holes are used to allow clearance for the ends of the tie bolts.

[0013] Furthermore, the mounting bracket includes a bracket base plate, a side support plate, and a mounting side plate, wherein the mounting side plate is fixedly mounted on the top of the bracket base plate via the side support plate, and the bracket base plate is fixedly mounted on the surface of the workbench.

[0014] Furthermore, guide shafts are vertically fixedly installed on both sides of the top of the upper fixed plate. The guide shafts pass through the top plate and are slidably connected to the linear bearings, which are fixedly installed on the top plate.

[0015] Furthermore, the plug is made of rubber.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention uses a slide rail in conjunction with a feeding platform to push the fuel cell stack, making the conveying process smooth. At the same time, when fixing the fuel cell stack, symmetrically arranged side fixing devices are used to fix the sides of the fuel cell stack, thereby ensuring the stability of the fuel cell stack during testing. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a fixing device for AEM stack sealing test.

[0019] Figure 2 This is a front view of a fixture used for AEM stack sealing test.

[0020] Figure 3 This is a side view of a mounting device for AEM stack sealing test.

[0021] Figure 4 This is a top view of a mounting device for testing the sealing performance of an AEM fuel cell stack.

[0022] Figure 5 This is a schematic diagram of the feed slide rail in a fixing device for AEM stack sealing test.

[0023] Figure 6 This is a schematic diagram of the upper fixing block in a fixing device for AEM stack sealing test.

[0024] Figure 7 This is a schematic diagram of a fuel cell stack fixed in a fixture used for AEM fuel cell stack sealing test.

[0025] Figure 8This is a schematic diagram of a mounting device used for AEM fuel cell stack sealing test when the fuel cell stack is fixed. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] The fuel cell stack fixed in this solution is the fuel cell stack 9 (electrolyzer) in an integrated AEM water electrolysis hydrogen production device disclosed in our company's prior patent application with authorization announcement number CN118345402B. The fuel cell stack 9 includes a lower end plate 901, an upper end plate 902, and a membrane assembly located between the lower end plate 901 and the upper end plate 902. The lower end plate 901 and the upper end plate 902 are fixed together by tie bolts 903. Both the lower end plate 901 and the upper end plate 902 are regular octagons.

[0028] Please see Figures 1-7 A fixture for AEM stack sealing test, comprising a workbench 1;

[0029] The workbench 1 is equipped with a fuel cell stack side fixing device 3, and two sets of fuel cell stack side fixing devices 3 are symmetrically arranged. Two feed slide rails 2 are arranged between the two sets of fuel cell stack side fixing devices 3.

[0030] Two feeding slide rails 2 are parallel to each other and fixedly installed on the surface of the workbench 1. The feeding slide rails 2 are arranged along the front and back direction. The feeding slide rails 2 are slidably connected to the feeding platform 201 by a slider. The front end of the feeding platform 201 is fixedly installed with a handle 202 to facilitate the operator to push the feeding platform 201.

[0031] The top of the feeding platform 201 is also provided with a regular octagonal placement groove 203 for fitting with the lower end plate 901 of the fuel cell stack 9. At the same time, the bottom of the placement groove 203 is provided with eight clearance holes 204 in a circular array. The clearance holes 204 are used to allow clearance at the ends of the tie bolts 903.

[0032] The side fixing device 3 of the fuel cell stack includes a mounting bracket 301, a lower fixing clamp 307 and an upper fixing clamp 308;

[0033] The mounting bracket 301 includes a bracket base plate 302, a side support plate 303, and a mounting side plate 304. The mounting side plate 304 is fixedly mounted on the top of the bracket base plate 302 through the side support plate 303, and the bracket base plate 302 is fixedly mounted on the surface of the workbench 1.

[0034] A bottom fixing cylinder 305 and a top fixing cylinder 306 are fixedly installed on the outer side of the mounting bracket 301. The output shafts of the bottom fixing cylinder 305 and the top fixing cylinder 306 pass through the mounting side plate 304 and are respectively fixedly installed with a lower fixing clamp 307 and an upper fixing clamp 308.

[0035] The lower fixing clamps 307 of the two sets of fuel cell stack side fixing devices 3 fix the bottom end plate of the fuel cell stack 9, and the upper fixing clamps 308 of the two sets of fuel cell stack side fixing devices 3 fix the top end plate of the fuel cell stack 9.

[0036] The top of the workbench 1 is also fixedly installed with a top plate 4 via a column 401. A top cylinder 5 is vertically fixedly installed on the top of the top plate 4. The output shaft of the top cylinder 5 passes through the top plate 4 and is also fixedly connected to an upper fixed plate 501. In order to limit the lifting path of the upper fixed plate 501, guide shafts 502 are also vertically fixedly installed on both sides of the top of the upper fixed plate 501. The guide shafts 502 pass through the top plate 4 and are slidably connected to linear bearings 503. The linear bearings 503 are fixedly installed on the top plate 4.

[0037] The bottom of the upper fixing plate 501 is also fixedly installed with an upper fixing block 6, wherein the interior of the upper fixing block 6 is hollow, and the side of the upper fixing block 6 is also provided with several clearance grooves 601, which are used to avoid the end of the tie bolt 903; so that the upper fixing block 6 presses directly on the upper end plate 902 without contacting the tie bolt 903.

[0038] A plug cylinder 7 is also fixedly installed on the top of the upper fixing plate 501. There are four plug cylinders 7 in total, and the four plug cylinders 7 are independently controlled. The output shaft of the plug cylinder 7 passes through the upper fixing plate 501 and is fixedly connected to a plug 701. The plug 701 is made of rubber. The plug 701 is used to seal the connection ports of the liquid inlet pipe, liquid outlet pipe, hydrogen outlet pipe and oxygen outlet pipe on the fuel cell stack.

[0039] When using this utility model, the fuel cell stack is placed vertically on top of the feeding platform 201. At this time, the lower end plate of the fuel cell stack is located in the placement groove 203 of the feeding platform 201. At this time, the bottom of the tie bolt 903 of the fuel cell stack 9 is located in the clearance hole 204. At this time, the operator slowly pushes the feeding platform 201 to push the fuel cell stack 9 between the two sets of fuel cell stack side fixing devices 3.

[0040] Then the bottom fixing cylinder 305 and the top fixing cylinder 306 of the fuel cell stack side fixing device 3 are activated, the two fixing clamps 307 fix the bottom end plate of the fuel cell stack 9, and the two upper fixing clamps 308 fix the top end plate of the fuel cell stack 9.

[0041] like Figure 8 As shown, the top cylinder 5 is then activated, which drives the upper fixing block 6 at the bottom of the upper fixing plate 501 to press down on the upper end plate of the fuel cell stack 9. The plug cylinder 7 is activated, which drives the plug 701 to press down and seal the connection port of the fuel cell stack. After the automatic sealing is completed, it is convenient for subsequent airtightness testing.

[0042] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connect" should be interpreted broadly. For example, "connection" 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A fixing device for AEM stack leak test, comprising a workbench; characterized in that, The workbench is provided with electric pile side fixing devices, and the electric pile side fixing devices are symmetrically provided with two groups, two groups of electric pile side fixing devices are provided with two feeding slide rails between them, the two feeding slide rails are parallel to each other and are fixedly installed on the surface of the workbench, and the feeding slide rails are arranged in the front-rear direction, a feeding table is slidably connected to the feeding slide rails through a sliding block, the electric pile side fixing device comprises a mounting bracket, a lower fixing clamp and an upper fixing clamp; the outer side of the mounting bracket is fixedly provided with a bottom fixing cylinder and a top fixing cylinder, the output shafts of the bottom fixing cylinder and the top fixing cylinder are fixedly provided with a lower fixing clamp and an upper fixing clamp through a mounting side plate; the top of the workbench is also fixedly provided with a top plate through a stand column, the top of the top plate is vertically fixedly provided with a top cylinder, and the output shaft of the top cylinder is fixedly connected with an upper fixing plate through the top plate; the bottom of the upper fixing plate is also fixedly provided with an upper fixing block, wherein the upper fixing block is hollow inside, and a plurality of accommodation grooves are formed in the side of the upper fixing block; the top of the upper fixing plate is also fixedly provided with a plug-in cylinder, and the plug-in cylinder is provided with four plug-in cylinders which are independently controlled; wherein the output shaft of the plug-in cylinder passes through the upper fixing plate and is fixedly connected with a plug.

2. The fixing device for AEM stack leak test according to claim 1, wherein, The front end of the feeding table is fixedly provided with a handle to facilitate the operator to push the feeding table.

3. The fixing device for AEM stack leak test according to claim 1, wherein, The top of the feeding table is also provided with a regular octagonal placing groove for adapting to the lower end plate of the electric pile, and eight accommodation round holes are circularly arranged in the bottom of the placing groove; the accommodation round holes are used for accommodating the end of the pull bolt.

4. The device of claim 1, wherein the device is configured to be used in conjunction with an AEM stack leak test. The mounting bracket comprises a bracket bottom plate, a side support plate and a mounting side plate, wherein the mounting side plate is fixedly installed on the top of the bracket bottom plate through the side support plate, and the bracket bottom plate is fixedly installed on the surface of the workbench.

5. The device of claim 1, wherein the device is configured to be used in conjunction with an AEM stack leak test. The top of the upper fixing plate is also vertically fixedly provided with guide shafts on both sides, the guide shafts pass through the top plate, and the guide shafts are slidably connected with linear bearings, and the linear bearings are fixedly installed on the top plate.

6. The device of claim 1, wherein, The plug is made of rubber.

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