A gas tightness testing machine for hydrogen fuel bipolar plates

Abstract

The invention discloses an airtightness detection test machine for hydrogen fuel bipolar plates, which relates to the technical field of airtightness detection, and comprises an upper driving mechanism and a workbench main body, wherein a supporting detection device is installed at the side end of the workbench main body, and an airtightness detector is placed on the supporting detection device; the invention provides that a detection mechanism is adopted, a sealing mechanism is installed on an air pipe joint of the airtightness detector, the air pipe joint and the air pipe are tightly wrapped and sealed, during operation, the detection host is set and powered on by setting a key module to perform detection work, when the lifting plate is subjected to airtightness detection work, air leakage occurs between the air pipe joint and the air pipe, the airflow flows smoothly into the detection pipeline through the input pipe in the sealing rubber sleeve, the change of the airflow in the detection pipeline is detected by a micro wind speed transmitter, and the information is sent to a processing chip, the processing chip controls the sound and light alarm mechanism to work, reminds the staff of air leakage, and prevents misjudgment of the airtightness detection of the bipolar plate.

Description

Technical Field

[0001] The invention relates to the technical field of air tightness detection, and in particular to an air tightness detection tester for a hydrogen fuel bipolar plate. Background Art

[0002] Bipolar plate, also known as current collecting plate, is one of the important components of fuel cells. It has the following functions and properties: separation of fuel and oxidant to prevent gas penetration; collection and conduction of electric current with high conductivity; designed and processed flow channels to evenly distribute gas to the reaction layer of the electrode for electrode reaction; ability to discharge heat to keep the battery temperature uniform; corrosion resistance; impact and vibration resistance; thin thickness; light weight; low cost, easy machining, suitable for batch manufacturing, etc.; in the production process of hydrogen fuel bipolar plates, the bipolar plates need to be tested for air tightness, and the sealing quality of the product directly affects the product qualification rate and safety of use. At present, an air tightness testing machine (air tightness test bench) is used to test the air tightness of hydrogen fuel bipolar plates.

[0003] When the hydrogen fuel bipolar plate is placed on an airtightness test bench for airtightness testing, it is necessary to install an airtightness tester to control the airtightness test and obtain experimental data. At present, the airtightness tester is fixed on the airtightness test bench through a fixing plate, and the airtightness tester is used alone in the later stage, which takes time to disassemble and is relatively troublesome; there is an air pipe connection between the airtightness tester and the airtightness test bench, which is used by the airtightness tester to detect the airtightness of the hydrogen fuel bipolar plate. Therefore, the sealing of the connection between the hose joint and the airtightness tester is particularly important. Leakage may easily cause misjudgment of the airtightness test of the bipolar plate. For this reason, it is necessary to design a sealing detection device to detect and warn the sealing of the connection between the pipe joint and the airtightness tester. Summary of the invention

[0004] The present invention provides an air tightness detection tester for hydrogen fuel bipolar plates, which solves the above-mentioned technical problems.

[0005] In order to solve the above technical problems, the present invention provides an airtightness detection test machine for hydrogen fuel bipolar plates, including an upper driving mechanism and a workbench main body, wherein an airtight mold is arranged on the upper end of the workbench main body, and four pillars are fixed on the outer side of the upper end of the workbench main body to support and connect the upper driving mechanism, and the lower end of the upper driving mechanism is located above the airtight mold and is driven and connected to a lower pressing mold, and a driving cylinder is installed on the top of the upper driving mechanism and is driven and connected to the lower pressing mold, and a supporting detection device is installed on the side end of the workbench main body, and an airtightness detector is placed on the supporting detection device, and the supporting detection device includes an installation groove, which is arranged on the side end of the workbench main body, and the lower side shafts of both side ends of the installation groove are connected with telescopic placement The box comprises a telescopic placement box, wherein the telescopic placement box comprises a connection box, wherein two connection plates are connected to a rotating shaft in the middle of opposite side ends of the connection box, and movable grooves are provided on the front and back sides of the two connection plates, the connection box has an opening on the outer end, and a telescopic box is inserted into the opening, two slide grooves are provided through the two side ends of the telescopic box, and a plurality of limit blocks are provided in the two slide grooves, and are connected to the opposite side walls of the connection box, a detection mechanism is installed on the rear side of the telescopic box, the detection mechanism comprises a detection pipe, a micro wind speed transmitter is vertically penetrated at the top of the detection pipe, and a detection host is installed near the position of the micro wind speed transmitter, one end of the input pipe is penetrated at the side end of the detection pipe, and a sealing mechanism is penetrated at the other end of the input pipe.

[0006] Furthermore, two connecting shafts are connected through opposite sides of the movable groove of the connecting plate, and the two connecting shafts are respectively connected to the connecting box and the side wall of the installation groove.

[0007] Furthermore, the length of the telescopic box is equal to the inner length of the connection box, and the sum of the stretched lengths of the connection box and the telescopic box is greater than the width of the airtightness detector.

[0008] Furthermore, the width of the connection box is smaller than the inner height of the mounting groove, and the connection box can be flipped upward and embedded in the mounting groove.

[0009] Furthermore, the sealing mechanism includes a connecting tube, which is fixedly mounted on the air pipe joint of the airtightness detector, and a sealing rubber sleeve is connected to the outer end of the connecting tube. A fixing belt is fixed to the outer edge of the sealing rubber sleeve, and Velcro structures are provided on the front and back sides of the fixing belt.

[0010] Furthermore, the connecting air pipe of the workbench body is inserted into a sealing rubber sleeve and connected to the air pipe joint of the airtightness detector.

[0011] Furthermore, the micro wind speed transmitter penetrates into the detection pipeline near the input pipe.

[0012] Furthermore, a storage battery and a processing chip are arranged inside the detection host, and an audible and visual alarm mechanism is installed on the top of the detection host and a button module is arranged to be electrically connected to the processing chip.

[0013] Furthermore, the sound and light alarm mechanism includes a flashing light and a buzzer, and the flashing light and the buzzer are electrically connected to the processing chip.

[0014] Compared with the related art, the air tightness detection test machine for hydrogen fuel bipolar plates provided by the present invention has the following beneficial effects:

[0015] The present invention provides a telescopic placement box, which can be turned over and stretched to quickly form a placement rack to place an airtight detector or other accessories, which is relatively convenient and can be retracted again when not in use and turned over and embedded in the installation groove for storage, thereby reducing occupied space and allowing flexible use.

[0016] The present invention provides a detection mechanism, wherein a sealing mechanism is installed on the trachea joint of an airtight detector, and the trachea joint and the trachea are tightly wrapped and sealed. During operation, the detection host is set and powered on by setting a key module to perform detection work. When the lifting plate is subjected to airtightness detection work, air leakage occurs between the trachea joint and the trachea, and the airflow flows smoothly into the detection pipeline through the input pipe in the sealing rubber sleeve. The change of the airflow in the detection pipeline is detected by a micro wind speed transmitter, and the information is sent to a processing chip. The processing chip controls the operation of the sound and light alarm mechanism to remind the staff of air leakage, and timely perform maintenance to prevent misjudgment of the airtightness detection of the bipolar plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an overall schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the overall rear of the present invention;

[0019] Figure 3 It is a schematic diagram of the overall part of the present invention;

[0020] Figure 4 This is an enlarged schematic diagram of point A of the present invention;

[0021] Figure 5 This is a schematic diagram of the telescopic placement box of the present invention;

[0022] Figure 6 Schematic diagram of the detection mechanism of the present invention

[0023] Figure 7 Schematic diagram of the cross section of the detection mechanism of the present invention

[0024] Figure 8 It is a schematic diagram of the sealing mechanism of the present invention.

[0025] Numbers in the figure: 1. upper driving mechanism; 11. driving cylinder; 2. lower pressing mold; 3. airtight mold; 4. supporting detection device; 5. airtight detector; 6. workbench body; 41. mounting slot; 42. telescopic placement box; 43. detection mechanism; 421. connecting box; 422. telescopic box; 4221. slide slot; 4222. limit block; 423. connecting plate; 4231. moving slot; 431. sealing mechanism; 4311. sealing rubber sleeve; 4312. connecting pipe; 4313. fixing belt; 432. input pipe; 433. detection pipeline; 4331. micro wind speed transmitter; 434. detection host; 4341. sound and light alarm mechanism; 4342. setting button module. DETAILED DESCRIPTION

[0026] Embodiment 1, by Figure 1-5 The present invention includes an upper driving mechanism 1 and a workbench body 6, an airtight mold 3 is arranged on the upper end of the workbench body 6, and four pillars are fixed on the outer side of the upper end of the workbench body 6 to support and connect the upper driving mechanism 1, the lower end of the upper driving mechanism 1 is located above the airtight mold 3 and is drivingly connected to the lower pressing mold 2, a driving cylinder 11 is installed on the top of the upper driving mechanism 1 and is drivingly connected to the lower pressing mold 2, a supporting detection device 4 is installed on the side end of the workbench body 6, and an airtight detector 5 is placed on the supporting detection device 4, the supporting detection device 4 includes a mounting groove 41, the mounting groove 41 is arranged on the side end of the workbench body 6, and the lower side shafts of the two side ends of the mounting groove 41 are connected to a telescopic placement box 42, the telescopic placement box 42 includes a connecting box 421, and the middle shafts of the opposite side ends of the connecting box 421 are connected to two connecting plates 423, and the two connecting plates 42 A movable groove 4231 is provided on the front and back sides, the connecting box 421 is provided with an opening at the outer end, and a telescopic box 422 is inserted into the opening, two sliding grooves 4221 are provided on both sides of the telescopic box 422, and a plurality of limit blocks 4222 are provided in the two sliding grooves 4221, and are connected to the opposite side walls of the connecting box 421, and a detection mechanism 43 is installed on the inner rear side of the telescopic box 422; two connecting shafts are connected to the opposite sides of the movable groove 4231 of the connecting plate 423, and the two connecting shafts are respectively connected to the connecting box 421 and the side wall of the mounting groove 41; the length of the telescopic box 422 is equal to the inner length of the connecting box 421, and the sum of the stretched lengths of the connecting box 421 and the telescopic box 422 is greater than the width of the airtightness detector 5; the width of the connecting box 421 is less than the inner height of the mounting groove 41, and the connecting box 421 can be turned upward and embedded in the mounting groove 41;

[0027] Among them, the telescopic placement box 42 embedded in the installation groove 41 is buckled out, the telescopic placement box 42 is grasped and forced outward, the connecting box 421 is rotated downward through the rotating shaft, and at the same time, the connecting box 421 pulls the connecting plate 423 through the connected connecting shaft, and moves in the movable groove 4231, so that the connecting box 421 and the installation groove 41 are vertically limited, and then the telescopic box 422 is grasped and limited to apply force, driving the detection mechanism 43 to move and pull it out of the connecting box 421, and the telescopic box 422 is limited by the slide groove 4221 and multiple limit blocks 4222. Finally, the airtightness detector 5 can be placed on the connecting box 421 and the telescopic box 422. Through this structure, a placement rack is conveniently formed to place the airtightness detector 5 or other accessories, which is relatively convenient, and can be retracted when not in use, and flipped and embedded in the installation groove 41 for storage, thereby reducing the occupied space and being flexible to use.

[0028] Embodiment 2, based on embodiment 1, Figure 6-8 The detection mechanism 43 includes a detection pipe 433, the top of the detection pipe 433 is vertically connected with a micro wind speed transmitter 4331, and a detection host 434 is installed near the micro wind speed transmitter 4331. The side end of the detection pipe 433 is connected with one end of an input pipe 432, and the other end of the input pipe 432 is connected with a sealing mechanism 431; the sealing mechanism 431 includes a connecting pipe 4312, the connecting pipe 4312 is fixedly installed on the air pipe joint of the airtight detector 5, and the connecting pipe 4312 is connected to a sealing rubber sleeve 4311 at the outer end, and the outer edge of the sealing rubber sleeve 4311 is fixed. A fixing belt 4313 is fixed, and a Velcro structure is provided on the front and back of the fixing belt 4313; the connecting air pipe of the workbench body 6 is inserted into the sealing rubber sleeve 4311 and connected to the air pipe joint of the airtightness detector 5; the micro wind speed transmitter 4331 penetrates the detection pipeline 433 near the position of the input pipe 432; the detection host 434 is provided with a battery and a processing chip, and the top of the detection host 434 is installed with a sound and light alarm mechanism 4341 and a key module 4342 electrically connected to the processing chip; the sound and light alarm mechanism 4341 includes a flashing light and a buzzer, and the flashing light and the buzzer are electrically connected to the processing chip;

[0029] Among them, the connecting pipe 4312 is sleeved and fixed on the air pipe joint of the airtight detector 5, the air pipe of the workbench body 6 is inserted into the sealing rubber sleeve 4311 and fixedly connected with the joint of the airtight detector 5, and then the fixing belt 4313 is wrapped around the sealing rubber sleeve 4311 and fixed with Velcro, so that the sealing rubber sleeve 4311 tightly wraps and seals the air pipe joint and the air pipe. When working, the detection host 434 is set and powered on by setting the button module 4342 to perform the detection work. When the lifting plate is tested for airtightness, When air leaks between the trachea joint and the trachea, the airflow in the sealing rubber sleeve 4311 flows smoothly into the input pipe 432 into the detection pipe 433, and the change of the airflow in the detection pipe 433 is detected by the micro wind speed transmitter 4331. The micro wind speed transmitter 4331 sends the information to the processing chip, and the processing chip controls the sound and light alarm mechanism 4341 to work. The flashing light starts to flash and the buzzer sounds, reminding the staff that there is a leak and to carry out maintenance in time to prevent misjudgment of the air tightness detection of the bipolar plate.

[0030] In this embodiment: a micro wind speed transmitter 4331 with model number W410C2 is used.

[0031] Working principle:

[0032] Before use, buckle out the telescopic placement box 42 embedded in the installation slot 41, grab the telescopic placement box 42 and force it outward, the connection box 421 is rotated downward through the rotating shaft, and at the same time, the connection box 421 pulls the connecting plate 423 through the connected connecting shaft and moves in the moving slot 4231, so that the connection box 421 and the installation slot 41 are vertically limited, and then the telescopic box 422 is grabbed and limited to apply force to drive the detection mechanism 43 to move and pull it out of the connection box 421, and the telescopic box 422 is limited by the slide slot 4221 and multiple limit blocks 4222, and finally the airtightness detector 5 is placed on the connection box 421 and the telescopic box 422. Through this structure, a placement rack is conveniently formed to place the airtightness detector 5 or other accessories, which is relatively convenient, and can be retracted when not in use, and flipped and embedded in the installation slot 41 for storage, which reduces the occupied space and is flexible to use;

[0033] Next, install the detection mechanism 43, sleeve and fix the connecting pipe 4312 on the air pipe joint of the airtight detector 5, insert the air pipe of the workbench body 6 into the sealing rubber sleeve 4311 and fix it with the joint of the airtight detector 5, then wrap the fixing belt 4313 around the sealing rubber sleeve 4311 and fix it with Velcro, so that the sealing rubber sleeve 4311 tightly wraps and seals the air pipe joint and the air pipe. When working, set the detection host 434 through the setting button module 4342 and power on to check. When the lifting plate is airtight, During the sex detection, air leakage occurs between the trachea joint and the trachea, and the airflow flows smoothly from the input tube 432 in the sealing rubber sleeve 4311 into the detection pipe 433. The change of the airflow in the detection pipe 433 is detected by the micro wind speed transmitter 4331, and the micro wind speed transmitter 4331 sends the information to the processing chip. The processing chip controls the sound and light alarm mechanism 4341 to work, the flashing light starts to flash, and the buzzer sounds, reminding the staff that there is a leak and to carry out maintenance in time to prevent misjudgment of the air tightness detection of the bipolar plate.

Claims

1. A gas tightness testing machine for hydrogen fuel bipolar plates, comprising an upper driving mechanism (1) and a workbench body (6), wherein an airtight mold (3) is arranged at the upper end of the workbench body (6), and four pillars are fixed to the outer side of the upper end of the workbench body (6) to support and connect the upper driving mechanism (1), the lower end of the upper driving mechanism (1) is located above the airtight mold (3) and is drivingly connected to a lower pressing mold (2), and a driving cylinder (11) is installed at the top of the upper driving mechanism (1) and is drivingly connected to the lower pressing mold (2), characterized in that: A support detection device (4) is installed at the side end of the workbench body (6), and an airtightness detector (5) is placed on the support detection device (4). The support detection device (4) comprises a mounting groove (41), the mounting groove (41) is arranged at the side end of the workbench body (6), and a telescopic placement box (42) is connected to the lower side rotation axis of both side ends of the mounting groove (41), and the telescopic placement box (42) comprises a connecting box (421), and two connecting plates (423) are connected to the middle rotation axis of opposite side ends of the connecting box (421), and the two connecting plates (423) are provided with moving grooves (4231) on the front and back surfaces, and the connecting box (421) is provided with an opening at the outer end, and the telescopic box (422) is inserted into the opening, and the telescopic placement box (421) is connected to the lower side rotation axis of both side ends of the connecting box (421). Two sliding grooves (4221) are formed through the two side ends of the telescopic box (422), and a plurality of limit blocks (4222) are formed through the two sliding grooves (4221) and are connected to the opposite side walls of the connection box (421). A detection mechanism (43) is installed on the inner rear side of the telescopic box (422), and the detection mechanism (43) comprises a detection pipe (433). A micro wind speed transmitter (4331) is vertically connected to the top of the detection pipe (433), and a detection host (434) is installed near the micro wind speed transmitter (4331). One end of the input pipe (432) is connected through the side end of the detection pipe (433), and the other end of the input pipe (432) is connected through the sealing mechanism (431). The sealing mechanism (431) comprises a connecting tube (4312), the connecting tube (4312) being fixedly mounted on the air pipe joint of the airtight detector (5), and the connecting tube (4312) being connected to a sealing rubber sleeve (4311) at the outer end, a fixing belt (4313) being fixed to the outer edge of the sealing rubber sleeve (4311), and a Velcro structure being arranged on the front and back sides of the fixing belt (4313); The detection host (434) is provided with a storage battery and a processing chip inside, and a sound and light alarm mechanism (4341) and a setting button module (4342) are installed on the top of the detection host (434) and are electrically connected to the processing chip; The sound and light alarm mechanism (4341) comprises a flashing light and a buzzer, and the flashing light and the buzzer are electrically connected to the processing chip.

2. The air tightness testing machine for hydrogen fuel bipolar plates according to claim 1, characterized in that: Two connecting shafts are connected through opposite sides of the movable groove (4231) of the connecting plate (423), and the two connecting shafts are respectively connected to the connecting box (421) and the side wall of the installation groove (41).

3. The air tightness testing machine for hydrogen fuel bipolar plates according to claim 1, characterized in that: The length of the telescopic box (422) is equal to the inner length of the connection box (421), and the sum of the stretched lengths of the connection box (421) and the telescopic box (422) is greater than the width of the airtightness detector (5).

4. The air tightness testing machine for hydrogen fuel bipolar plates according to claim 1, characterized in that: The width of the connection box (421) is smaller than the inner height of the installation groove (41), and the connection box (421) can be flipped upwards and embedded in the installation groove (41).

5. The air tightness testing machine for hydrogen fuel bipolar plates according to claim 1, characterized in that: The connecting air pipe of the workbench body (6) is inserted into the sealing rubber sleeve (4311) and connected to the air pipe joint of the airtightness detector (5).

6. The air tightness testing machine for hydrogen fuel bipolar plates according to claim 1, characterized in that: The micro wind speed transmitter (4331) penetrates into the detection pipeline (433) at a position close to the input pipe (432).

Images