Airtightness detection machine

Abstract

The utility model provides an air tightness detection machine. The air tightness detection machine comprises a hydraulic machine and an air tightness detection module, a feeding mechanism is arranged on one side of the hydraulic machine, a control cabinet is arranged on the other side of the hydraulic machine, and the air tightness detection module is partially arranged in the control cabinet. The hydraulic machine comprises a first platform capable of moving up and down, a second platform mounted on the first platform and a third platform arranged above the first platform, and the second platform can transversely move to and fro between the feeding mechanism and the hydraulic machine; when the second platform is arranged in the hydraulic machine, the third platform can descend or ascend relative to the second platform. The first platform used for installing the jig and the battery moves transversely to achieve feeding and discharging, positioning work of the jig and the battery on the first platform is achieved on the outer side of the hydraulic machine, enough working space is provided, operation is more convenient, and interference is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen energy fuel cell processing, in particular to an airtightness detection machine. Background Art

[0002] Air tightness and insulation are two major safety indicators of hydrogen fuel cells. During the production of hydrogen fuel cells, air tightness testing is required. The air tightness test mainly includes hydrogen flow channel air tightness test and overall air tightness test.

[0003] When conducting the hydrogen flow channel air tightness test, if the working pressure of the hydrogen side of the fuel cell is ≥50kpa, the airtight pressure test pressure is set to 50kpa, if the working pressure of the hydrogen side of the fuel cell is between 30-50kpa, the airtight pressure test pressure is set to (30-50kpa), if the working pressure of the hydrogen side of the fuel cell is <30kpa, the airtight pressure test pressure is set to 30 kpa. The test process is: first close the hydrogen outlet, keep other inlets and outlets unobstructed, and pass helium-nitrogen mixed gas (helium concentration is not less than 10%) from the hydrogen inlet to stabilize the pressure to the set pressure. After the pressure stabilizes to the set pressure, close the hydrogen inlet, maintain the pressure for 20 minutes, and record the pressure drop value.

[0004] When conducting the overall air tightness test, close the hydrogen outlet, air outlet and coolant outlet, and introduce helium-nitrogen mixed gas (helium concentration not less than 10%) from the hydrogen inlet, air inlet and coolant inlet to stabilize the pressure to the normal working pressure. Then close the main air inlet, maintain the pressure for 20 minutes, and record the pressure drop value.

[0005] The airtightness test is generally achieved through a test machine, which includes a hydraulic press and an airtightness test module. The hydraulic press is a hydraulic press for airtightness test of bipolar plates for fuel cells disclosed in the existing patent announcement number CN218560348U, which includes a hydraulic press, and a loading and unloading device is provided on one side of the hydraulic press. The loading and unloading device includes a push-pull assembly and a jacking assembly driven by the push-pull assembly. The jacking assembly is provided with an adsorption assembly, and the adsorption assembly includes a loading suction cup and a unloading suction cup. The two sides of the hydraulic press are provided with a pushing assembly and a receiving assembly. The bipolar plate is adsorbed in the pushing assembly by the loading suction cup for loading with the cooperation of the push-pull assembly and the jacking assembly, while the unloading suction cup adsorbs the bipolar plate after testing to the receiving assembly for unloading. The adsorption assembly uses a rod and a suction cup arranged at the end of the rod. During operation, the rod and the suction cup need to be inserted into the hydraulic press, which is easy to cause interference and the working space is limited. Utility Model Content

[0006] The utility model aims to provide an airtightness detection machine, which optimizes the feeding mechanism for feeding materials and avoids interference.

[0007] The technical solution of the utility model is: an airtight detection machine, comprising a hydraulic press and an airtight detection module, a feeding mechanism is arranged on one side of the hydraulic press, a control cabinet is arranged on the other side, and the airtight detection module is partially placed in the control cabinet; the hydraulic press comprises a first platform capable of lifting and lowering movements, a second platform installed on the first platform, and a third platform arranged above the first platform, the second platform can be laterally displaced to travel back and forth between the feeding mechanism and the hydraulic press; when the second platform is placed inside the hydraulic press, the third platform can descend or rise relative to the second platform.

[0008] In the above scheme, a feeding mechanism is arranged beside the hydraulic press, so that the first platform for installing the jig and the battery is displaced laterally to realize loading and unloading, the rod and the suction cup on the rod are eliminated, and the positioning of the jig and the battery on the first platform is realized on the outside of the hydraulic press (i.e., on the feeding mechanism), so there is enough working space, the operation is more convenient, and interference is avoided.

[0009] Preferably, the hydraulic press also includes a base and a top seat arranged above the base, a guide column is connected between the base and the top seat, the first platform is installed on the base through a lifting cylinder, the third platform is mounted on the guide column, and a pressurizing cylinder is provided on the top seat, and the pressurizing cylinder is connected to the third platform.

[0010] Preferably, a lifting lug is provided on the top seat.

[0011] Preferably, a rod is connected between the top seat and the base, and two proximity switches are arranged on the rod.

[0012] Preferably, the bottom of the control cabinet is mounted on a base.

[0013] Preferably, the feeding mechanism includes a frame and a fourth platform arranged in the frame, the fourth platform is provided with a first linear guide rail, the first platform is provided with a second linear guide rail, the second platform is slidably connected to the first platform through the second linear guide rail, and the second linear guide rail is aligned with the first linear guide rail after the first platform rises.

[0014] Preferably, a slide cylinder for driving the lateral displacement of the second platform is connected between the second platform and the first platform.

[0015] Preferably, a shell is provided outside the hydraulic press, one end of the shell is a feed port, and the feed port is adapted to a feed mechanism.

[0016] Preferably, the shell is provided with doors, and the doors are located on both sides of the feed inlet.

[0017] Compared with the related art, the beneficial effects of the utility model are:

[0018] 1. A feeding mechanism is arranged on the side of the hydraulic press, and the first platform for installing the jig and the battery is displaced horizontally to realize loading and unloading, and the rod and the suction cup on the rod are eliminated. The positioning of the jig and the battery on the first platform is realized on the outside of the hydraulic press (i.e., on the feeding mechanism), which provides sufficient working space, makes the operation more convenient, and avoids interference;

[0019] 2. The hydraulic press and control cabinet are enclosed by a shell to provide protection;

[0020] 3. A control cabinet is installed beside the hydraulic press, and the bottom of the control cabinet is connected to the base, so that the hydraulic press and the airtight detection module are integrated into one. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of the airtightness detection machine provided by the utility model;

[0022] Figure 2 A schematic diagram of the structure of the airtightness detection machine provided by the utility model with the outer shell removed from the first viewing angle;

[0023] Figure 3 A schematic diagram of the structure of the airtightness detection machine provided by the utility model with the outer shell removed from a second viewing angle;

[0024] Figure 4 for Figure 2 A is an enlarged schematic diagram.

[0025] In the attached drawings: 1. hydraulic press; 11. first platform; 12. second platform; 13. third platform; 14. base; 15. top seat; 16. guide column; 17. lifting ear; 18. rod; 19. proximity switch; 110. lifting cylinder; 111. second linear guide; 112. slide cylinder; 113. pressurizing cylinder; 2. airtight detection module; 3. feeding mechanism; 31. frame; 32. fourth platform; 33. first linear guide; 4. control cabinet; 5. casing; 51. feeding port; 52. door. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0027] like Figure 1-Figure 3 As shown, an airtightness detection machine provided in this embodiment includes a hydraulic press 1, an airtightness detection module 2, a feeding mechanism 3, a control cabinet 4 and a housing 5.

[0028] The hydraulic press 1 includes a first platform 11, a second platform 12, a third platform 13, a base 14, a top seat 15, a guide column 16, a lifting lug 17, a rod 18, a proximity switch 19, a lifting cylinder 110, a second linear guide rail 111 and a slide cylinder 112.

[0029] The top seat 15 is located directly above the base 14, and the guide posts 16 are connected between the base 14 and the top seat 15. The guide posts 16 are distributed around the base 14. The first platform 11 is placed above the base 14 and is installed on the base 14 through a lifting cylinder 110. Figure 4 As shown, the first platform 11 is provided with a second linear guide rail 111, and the second platform 12 is slidably connected to the first platform 11 through the second linear guide rail 111. A slide cylinder 112 is connected between the second platform 12 and the first platform 11 for driving the second platform 12 to move laterally.

[0030] The third platform 13 is sleeved on the guide column 16. A pressure cylinder 113 is provided on the top seat 15, and the pressure cylinder 113 is connected to the third platform 13. The third platform 13 is driven to rise and fall by the extension and contraction of the pressure cylinder 113 to pressurize or release the fixture on the second platform 12.

[0031] A rod 18 is connected between the top seat 15 and the base 14, and two proximity switches 19 are arranged on the rod 18. The two proximity switches 19 respectively define the upper limit position and the lower limit position of the second platform 12. The top seat 15 is provided with the lifting lug 17.

[0032] like Figure 3 The airtightness detection module 2 is partially placed in the control cabinet 4, and the other part is used to inflate the fixture for installing the detection product. The airtightness detection module 2 is an externally purchased part and can be used after being installed according to the instructions.

[0033] The feeding mechanism 3 includes a frame 31 and a fourth platform 32 disposed in the frame 31. A first linear guide rail 33 is disposed on the fourth platform 32. When the lifting cylinder 110 is raised and lowered to align the second linear guide rail 111 with the first linear guide rail 33, the second platform 12 is laterally moved into the hydraulic press 1 or onto the first linear guide rail 33 of the feeding mechanism 3 by extending and retracting the slide cylinder 112, so as to realize loading and unloading.

[0034] The control cabinet 4 is placed on the side of the hydraulic press 1 away from the feeding mechanism 3. The bottom of the control cabinet 4 is installed on the base 14 and can be lifted together with the base 14. The airtightness detection module 2 includes an air control valve, a solenoid valve, a sensor, an air pipe pressure reducing valve, etc. These valve bodies are respectively installed on the control cabinet 4 and the base 14 (such as Figure 3As shown in the figure, the hydraulic press 1 and the airtight detection module 2 are integrated and installed, which is convenient for transportation and does not take up too much space. The hydraulic press 1 is provided with a shell 5 on the outside, and one end of the shell 5 is a feed port 51, and the feed port 51 is adapted to the feed mechanism 3. The shell 5 is provided with doors 52 on both sides of the feed port 51.

[0035] When in use, start the lifting cylinder 110 to extend, drive the first platform 11 and the second platform 12 to rise, until the second linear guide 111 is flush with the first linear guide 33, and stop the lifting cylinder 110. Then start the slide cylinder 112 to extend, so that the second platform 12 moves horizontally along the second linear guide 111 and the first linear guide 33 to the feeding mechanism 3. Install a fixture on the second platform 12. The fixture is made of 45 steel, and multiple contour cavities for detecting products are processed inside. The products are installed one by one with the contour cavities in the fixture, and sealed with seals. Pipes and air inlets that are connected to the contour cavities are processed on the fixture. After the fixture is installed on the second platform 12, the air inlet is connected to the air pipe. Start the slide cylinder 112 again to move the second platform 12 horizontally to the first platform 11. Start the lifting cylinder 110 to drive the first platform 11 and the second platform 12 to rise, and start the pressurizing cylinder 113 to drive the third platform 13 to move down, so that the third platform 13 presses the fixture. Start the airtightness test, pass high-pressure gas into the contoured cavity in the fixture, perform corresponding tests, and determine the results based on the sensor of the airtightness test module 2. After the test is completed, move the second platform 12 and the fixture horizontally to the feeding mechanism 3, take out the product (such as bipolar plates), and install the next batch of test products. At this time, there is no need to disassemble the fixture.

[0036] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An airtightness detection machine, comprising a hydraulic press and an airtightness detection module, characterized in that: A feeding mechanism is provided on one side of the hydraulic press, and a control cabinet is provided on the other side, wherein the airtight detection module is partially placed in the control cabinet; The hydraulic press includes a first platform capable of lifting and lowering movements, a second platform installed on the first platform, and a third platform arranged above the first platform. The second platform can be displaced laterally to move back and forth between the feeding mechanism and the hydraulic press; when the second platform is placed inside the hydraulic press, the third platform can descend or rise relative to the second platform.

2. The airtightness detection machine according to claim 1, characterized in that: The hydraulic press also includes a base and a top seat arranged above the base, a guide column is connected between the base and the top seat, the first platform is installed on the base through a lifting cylinder, the third platform is mounted on the guide column, a pressure cylinder is provided on the top seat, and the pressure cylinder is connected to the third platform.

3. The airtightness detection machine according to claim 2, characterized in that: The top seat is provided with a lifting lug.

4. The airtightness detection machine according to claim 2, characterized in that: A rod is connected between the top seat and the base, and two proximity switches are arranged on the rod.

5. The airtightness detection machine according to claim 2, characterized in that: The bottom of the control cabinet is installed on the base.

6. The airtightness detection machine according to claim 1, characterized in that: The feeding mechanism includes a frame and a fourth platform arranged in the frame, the fourth platform is provided with a first linear guide rail, the first platform is provided with a second linear guide rail, the second platform is slidably connected to the first platform through the second linear guide rail, and the second linear guide rail is aligned with the first linear guide rail after the first platform rises.

7. The airtightness detection machine according to claim 1, characterized in that: A slide cylinder for driving the second platform to move laterally is connected between the second platform and the first platform.

8. The airtightness detection machine according to claim 1, characterized in that: A shell is arranged outside the hydraulic press, one end of the shell is a feed port, and the feed port is adapted to a feed mechanism.

9. The airtightness detection machine according to claim 8, characterized in that: The shell is provided with doors, and the doors are located on both sides of the feed inlet.

Images