A box product air tightness testing device

Abstract

The utility model relates to the field of box detection, especially a box product air -tight test device, the device includes the frame, the top of frame is provided with test platform, one side on test platform is provided with the plugging component and drive mechanism, the other side is provided with the placement area for placing the measured box, the plugging component includes the plugging plate and the plugging strip, the plugging plate is adapted with the opening surface of measured box, the front side of plugging plate is opposite the opening surface of measured box, the back of plugging plate connects drive mechanism, the periphery edge of plugging plate front side is fixed with a circle plugging strip, the middle part of plugging strip forms the plugging cavity for plugging the opening surface of measured box, is provided with the air inlet hole on plugging plate. The utility model can carry out integrality plugging to the opening surface of measured box, and the plugging effect is good, can take into account the different box with the opening number and opening position, and can effectively shorten waterproof test time, greatly improves the inspection efficiency, can better satisfy the actual detection demand of box product.

Description

Technical Field

[0001] This utility model relates to the field of enclosure testing technology, and in particular to an airtightness testing device for enclosure products. Background Technology

[0002] With the rapid development of the domestic new energy industry, the application of junction box products (sheet metal enclosures) is becoming more and more widespread. Since junction box products (sheet metal enclosures) operate in outdoor environments, the requirements for the waterproof rating of the products are relatively high.

[0003] Currently, all combiner box products are assembled with internal components and top covers, and all openings are sealed with sealing tape. A 5% sample from each batch is then used for waterproof testing. Existing waterproof testing equipment for combiner boxes employs a lengthy testing process, typically involving multiple steps. Sealing numerous openings during testing is difficult, making it unsuitable for combiner boxes with varying numbers and locations of openings. This cannot guarantee 100% product compliance. Furthermore, testing a single combiner box is time-consuming and inefficient, consuming significant time, manpower, and other resources, and impacting the product production cycle. Utility Model Content

[0004] To overcome the shortcomings of the prior art, this utility model provides an airtightness testing device for box products. This device can completely seal the opening surface of the box being tested, with good sealing effect. It can take into account different boxes with different numbers and positions of openings, and can effectively shorten the waterproof test time, greatly improving the inspection efficiency. Therefore, it can better meet the actual testing needs of box products.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: An airtightness testing device for a box product includes a frame, a testing platform is provided on the top of the frame, a sealing component and a driving mechanism are provided on one side of the testing platform, and a placement area for placing the box to be tested is provided on the other side. The sealing assembly includes a sealing plate and a sealing strip. The sealing plate is adapted to the opening surface of the test chamber. The front side of the sealing plate faces the opening surface of the test chamber. The rear side of the sealing plate is connected to the driving mechanism. A sealing strip is fixed around the perimeter of the front side of the sealing plate. The middle of the sealing strip forms a sealing cavity for sealing the opening surface of the test chamber. An air inlet is provided on the sealing plate.

[0006] Furthermore, The sealing strip is made of expanding foam, and the expanding foam is glued and fixed to the sealing plate.

[0007] Furthermore, Several drive mechanisms are arranged side by side. Each drive mechanism includes a cylinder, a connecting plate, and a fixed base. The fixed base is fixedly mounted on the test platform. The cylinder is fixedly mounted on the fixed base. The front end of the cylinder shaft is fixedly connected to the rear side of the connecting plate. The front side of the connecting plate is fixedly connected to the rear side of the sealing plate.

[0008] Furthermore, The drive mechanism also includes a control switch for controlling the cylinders, the control switch being fixed on the test platform and located between any two cylinders.

[0009] Furthermore, The test platform is also equipped with a limiting component for limiting the position of the test box. The limiting component includes a plurality of limiting seats fixed on the test platform. The plurality of limiting seats are arranged side by side and face the sealing plate, and a square placement area is formed between the limiting seats and the sealing plate.

[0010] Furthermore, The limiting seat includes a limiting plate and a reinforcing plate. The limiting plate includes a horizontal plate and a vertical plate that are vertically connected. The reinforcing plate is connected between the middle of the horizontal plate and the middle of the vertical plate. The horizontal plate is fixed on the test platform, and the vertical plate is directly opposite the sealing plate.

[0011] Furthermore, The limiting component also includes several limiting blocks fixed on the test platform. The limiting blocks are arranged side by side on one side of the placement area, and each limiting seat and each limiting block are respectively set along two adjacent right-angled sides of the square placement area.

[0012] Furthermore, The top of the limiting block has a chamfered edge near the edge of the test box to form a chamfered surface.

[0013] Furthermore, The test platform is also equipped with a protective component, which includes several elastic protective pads. The elastic protective pads include horizontal pads and vertical pads. The vertical pads are located on the side of the vertical plate facing the sealing plate. The horizontal pads are located in the placement area. One end of the horizontal pad is connected to the end of the vertical pad facing the test platform, and the other end of the horizontal pad extends towards the sealing plate to the edge of the placement area.

[0014] Furthermore, The number of horizontal pads and the number of vertical pads are the same as the number of limiting seats, and the width of the horizontal pads is the same as the width of the vertical pads.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: Without needing to consider the specific number and location of openings on the surface of the test enclosure, the sealing plate and sealing strip directly contact and seal the opening surface of the test enclosure, enabling overall sealing with good sealing effect. It can accommodate different enclosures with different numbers and locations of openings, and can effectively shorten the waterproof test time, greatly improving inspection efficiency. Therefore, it can better meet the actual testing needs of enclosure products.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings.

[0017] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the test junction box of the airtightness testing device for a box product according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of an airtightness testing device for a box-shaped product according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the test box product according to an embodiment of the present invention; Figure 4 This is a three-dimensional schematic diagram of a limiting seat according to an embodiment of the present utility model; Figure 5 This is a three-dimensional schematic diagram of a limiting block from a first-view perspective according to an embodiment of the present invention; Figure 6 This is a three-dimensional schematic diagram of a limiting block from a second perspective according to an embodiment of the present invention; Figure 7 for Figure 2 A magnified view of a portion of point A in the middle.

[0020] The markings in the diagram are: 1-Frame, 2-Test platform, 3-Sealing plate, 4-Sealing strip, 5-Opening surface, 6-Air inlet, 7-Cylinder, 8-Connecting plate, 9-Fixed seat, 10-Buffer pad, 11-Control switch, 12-Limit seat, 13-Limit block, 14-Placement area, 15-Reinforcing plate, 16-Horizontal plate, 17-Vertical plate, 18-Fixing hole, 19-Elastic protective pad, 20-Horizontal pad, 21-Vertical pad, 22-Chamfered surface, 23-Counterhead hole, 24-Limit hole, 25-Support leg, 26-Self-locking caster, 27-Combiner box. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] like Figure 1 As shown in the figure, one embodiment of this specification provides an airtightness testing device for a box product, including a frame 1. A test platform 2 is provided on the top of the frame 1. A sealing component and a drive mechanism are provided on one side of the test platform 2, and a placement area 14 for placing the box to be tested is provided on the other side. The sealing component includes a sealing plate 3 and a sealing strip 4. The sealing plate 3 is adapted to the opening surface 5 of the box to be tested. The front side of the sealing plate 3 faces the opening surface 5 of the box to be tested. The rear side of the sealing plate 3 is connected to the drive mechanism. A ring of the sealing strip 4 is fixed around the perimeter of the front side of the sealing plate 3. The middle part of the sealing strip 4 forms a sealing cavity for sealing the opening surface 5 of the box to be tested. An air inlet 6 is provided on the sealing plate 3.

[0023] In the above technical solution, the test platform 2 facilitates the airtightness test of the enclosure product. During the test, the enclosure under test is placed on the placement area 14 of the test platform 2. The drive mechanism drives the sealing plate 3 and the sealing strip 4 to move back and forth together, so that the sealing plate 3 and the sealing strip 4 can move forward and contact the opening surface 5 of the enclosure under test to seal it. The sealing plate 3 and the opening surface 5 of the enclosure under test are matched in size, so that the sealing plate 3 and the sealing strip 4 can contact and seal the opening surface 5 of the enclosure under test. The sealing strip 4 will surround the opening on the opening surface 5, which is conducive to achieving overall sealing. When contacting the sealing, it will squeeze the sealing strip 4 that surrounds the opening surface 5 and the sealing plate 3, so as to achieve effective sealing. After the sealing plate 3 and the sealing strip 4 contact and seal the opening surface 5 of the enclosure under test, air is injected into the enclosure through the air inlet 6 on the sealing plate 3 to perform the sealing test (whether there is leakage) and determine whether the enclosure can meet the IP65 protection level required by the enclosure product. In this embodiment, the sealing strips 4 on the four edges of the front side of the sealing plate 3 are pressed together to directly seal the entire structure, reducing the work of sealing the holes in the box and thus effectively improving the testing efficiency. The sealing plate 3 in this embodiment is rectangular in shape and its size is adapted to the opening surface 5 of the box being tested. The air inlet 6 is connected to the air inlet pipe, which makes it easy to fill the inside of the box with air according to the testing requirements.

[0024] The aforementioned airtightness testing device for enclosure products does not require consideration of the specific number and location of openings on the opening surface 5 of the enclosure under test. It directly uses the sealing plate 3 and sealing strip 4 to seal the opening surface 5 of the enclosure under test, achieving a complete seal with good sealing effect. It can accommodate enclosures with different numbers and locations of openings and effectively shortens the waterproof testing time, greatly improving inspection efficiency. Therefore, it can better meet the actual testing needs of enclosure products. This device effectively solves the problems of long waterproof testing time, difficulty in sealing many openings in enclosures, and inability to accommodate different enclosures in related technologies.

[0025] The scope of application of the airtightness testing device for enclosure products in the embodiments of this specification includes, but is not limited to, the manifold 27 product. It can be used to perform airtightness testing on other enclosure products according to actual testing needs. The following description uses the manifold 27 product as an example.

[0026] The overall structural diagram of the airtightness testing device for the junction box 27 product in this embodiment is shown below. Figure 2 As shown.

[0027] The structural schematic diagram of the combiner box 27 product under test in this embodiment is shown below. Figure 3 As shown.

[0028] A detailed schematic diagram of the sealing strip 4 fixed around the front four edges of the sealing plate 3 in this embodiment is shown below. Figure 7 As shown.

[0029] As a preferred technical solution, the sealing strip 4 is made of foamed rubber strip, which is glued and fixed to the sealing plate 3.

[0030] In this embodiment, the sealing strip 4 is made of foamed rubber strip, which is durable and has a good sealing effect. The foamed rubber strip can be easily and reliably fixed to the sealing plate 3 by adhesive.

[0031] In practice, foaming strips include, but are not limited to, silicone foaming strips and ethylene propylene diene monomer (EPDM) foaming strips.

[0032] As a preferred technical solution, several drive mechanisms are arranged side by side. Each drive mechanism includes a cylinder 7, a connecting plate 8, and a fixed seat 9. The fixed seat 9 is fixed on the test platform 2, and the cylinder 7 is fixed on the fixed seat 9. The front end of the cylinder shaft of the cylinder 7 is fixedly connected to the rear side of the connecting plate 8, and the front side of the connecting plate 8 is fixedly connected to the rear side of the sealing plate 3.

[0033] Because the opening surface 5 of the manifold 27 under test has a relatively long dimension, and the sealing plate 3 that matches the opening surface 5 also has a relatively long dimension, in order to ensure that the sealing plate 3 can be subjected to more uniform force when it contacts and seals the opening surface 5 of the manifold 27 under test, thereby improving the sealing effect, this embodiment arranges several driving mechanisms side by side, and these driving mechanisms act simultaneously on the sealing plate 3 to drive the sealing plate 3 and the sealing strip 4 to move back and forth together. This embodiment takes two driving mechanisms arranged side by side as an example for explanation, with the left and right sides of the sealing plate 3 respectively fixed on two corresponding connecting plates 8.

[0034] In this embodiment, the fixing seat 9 is fixed to the test platform 2 by screws, and the cylinder 7 is fixed to the fixing seat 9 by screws. The fixing seat 9 can well support and fix the cylinder 7. The connecting plate 8 at the front end of the cylinder shaft is connected to the sealing plate 3 by screws. The two cylinders 7 act on the left and right sides of the sealing plate 3 through the connecting plates 8 on both sides, thereby driving the entire sealing plate 3 to move back and forth.

[0035] In some embodiments, a buffer pad 10 is also provided between the connecting plate 8 and the sealing plate 3, which can play a certain buffering role when the sealing plate 3 and the sealing strip 4 contact the opening surface 5 of the junction box 27 under test.

[0036] As a preferred technical solution, the drive mechanism further includes a control switch 11 for controlling the cylinder 7. The control switch 11 is fixed on the test platform 2 and is located between any two cylinders 7.

[0037] In this embodiment, two cylinders 7 are provided, and the control switch 11 is directly located between the two cylinders 7 and behind the sealing plate 3, which makes it convenient for the test personnel to operate and control the cylinders 7 to drive the sealing plate 3 to move back and forth.

[0038] In some preferred embodiments, both cylinders 7 are three-axis cylinders 7, which are easy to control and have high control precision, and can facilitate the synchronous control of the two cylinders 7, and can synchronously drive the sealing plate 3 to achieve forward and backward movement.

[0039] As a preferred technical solution, the test platform 2 is also provided with a limiting component for limiting the position of the combiner box 27 under test; the limiting component includes a plurality of limiting seats 12 fixed on the test platform 2, the plurality of limiting seats 12 are arranged side by side and facing the sealing plate 3, and a square placement area 14 is formed between the limiting seats 12 and the sealing plate 3.

[0040] In this embodiment, after the combiner box 27 under test is placed on the placement area 14 of the test platform 2, it is limited by a limiting component. The limiting component includes several limiting seats 12, which are arranged side by side and face the sealing plate 3. When the cylinder 7 drives the sealing plate 3 and the sealing strip 4 to move forward together and contact the opening surface 5 of the combiner box 27 under test, the combiner box 27 under test will be subjected to force. The several limiting seats 12 arranged side by side can support the combiner box 27 under test to bear the force well, thereby better pressing the sealing strip 4 to seal the opening surface 5 of the combiner box 27 under test as a whole.

[0041] As a preferred technical solution, the limiting seat 12 includes a limiting plate and a reinforcing plate 15. The limiting plate includes a horizontal plate 16 and a vertical plate 17 that are vertically connected. The reinforcing plate 15 is connected between the middle of the horizontal plate 16 and the middle of the vertical plate 17. The horizontal plate 16 is fixed on the test platform 2, and the vertical plate 17 is directly opposite the sealing plate 3.

[0042] In this embodiment, the vertical plate 17 faces the sealing plate 3, allowing the combiner box 27 under test to be clamped between the vertical plate 17 and the sealing plate 3. This facilitates contact and sealing of the opening surface 5 of the combiner box 27 under test through the sealing plate 3 and the sealing strip 4. The reinforcing plate 15 is fixedly connected between the middle of the horizontal plate 16 and the middle of the vertical plate 17, effectively enhancing the structural strength of the entire limiting seat 12. This allows the vertical plate 17 to better support and limit the combiner box 27 under test. The horizontal plate 16 has fixing holes 18 located on both sides of the reinforcing plate 15. By providing fixing holes 18, it is easy to fix the limiting seat 12 to the test platform 2 with bolts. A schematic diagram of the limiting seat 12 in this embodiment is shown below. Figure 4 As shown.

[0043] As a preferred technical solution, the limiting component further includes a plurality of limiting blocks 13 fixed on the test platform 2. The plurality of limiting blocks 13 are arranged side by side on one side of the placement area 14, and each limiting seat 12 and each limiting block 13 are respectively arranged along two adjacent right-angled sides of the square placement area 14.

[0044] To better limit and fix the combiner box 27 under test, the limiting component in this embodiment also includes several limiting blocks 13. The limiting seats 12 and the limiting blocks 13 cooperate to effectively limit the combiner box 27 under test at right angles on both sides. In specific implementation, the limiting component in this embodiment includes three limiting seats 12 and two limiting blocks 13. The three limiting seats 12 are arranged side by side along one right-angled side of the placement area 14, and the two limiting blocks 13 are arranged side by side along the other right-angled side of the placement area 14, with the two right-angled sides adjacent. The arrangement of the three limiting seats 12 and the two limiting blocks 13 in the above manner can effectively limit the combiner box 27 under test at right angles on both sides, with good limiting effect and convenient placement of the combiner box 27 under test for testing.

[0045] As a preferred technical solution, the top of the limiting block 13 is chamfered near the edge of the junction box 27 being tested to form a chamfered surface 22.

[0046] In this embodiment, the limiting block 13 can be easily fixed on the test platform 2 by screws. The top of the limiting block 13 is provided with a chamfered surface 22, which removes sharp edges and can avoid scratching the junction box 27 product, thus protecting the appearance of the product.

[0047] In specific implementation, the limiting block 13 has a countersunk hole 23 extending vertically through its center, and a non-through limiting hole 24 for installing a limiting pin is provided on each side of its bottom. A limiting pin is fixed on the test platform 2, directly opposite the limiting hole 24. The countersunk hole 23 facilitates the fixing of the limiting block 13 to the test platform 2 with bolts, while the limiting pin prevents rotation of the limiting block 13. This method allows for convenient fixing of the limiting block 13 to the test platform 2. A schematic diagram of the limiting block 13 in this embodiment is shown below. Figure 5 and Figure 6 As shown.

[0048] As a preferred technical solution, the test platform 2 is further provided with a protective component, which includes a plurality of elastic protective pads 19. Each elastic protective pad 19 includes a horizontal pad 20 and a vertical pad 21. The vertical pad 21 is disposed on the side of the vertical plate 17 facing the sealing plate 3. The horizontal pad 20 is located in the placement area 14. One end of the horizontal pad 20 is connected to the end of the vertical pad 21 facing the test platform 2, and the other end of the horizontal pad 20 extends towards the sealing plate 3 to the edge of the placement area 14.

[0049] In this embodiment, several elastic protective pads 19 are provided. The vertical pads 21 are fixed on the vertical plate 17 and can play a certain buffering role when the sealing plate 3 and the sealing strip 4 contact and seal the opening surface 5 of the junction box 27 under test, and can protect the appearance of the product. The horizontal pads 20 are located in the placement area 14 and are set along the movement direction of the sealing plate 3, and can effectively protect the junction box 27 under test. The above-mentioned elastic protective pads 19 are evenly arranged and can effectively protect the junction box 27 under test product.

[0050] As a preferred technical solution, the number of horizontal pads 20 and the number of vertical pads 21 are the same as the number of limiting seats 12, and the width of the horizontal pads 20 is the same as the width of the vertical pads 21.

[0051] In this embodiment, three horizontal pads 20 and three vertical pads 21 are provided, the same number as the number of limiting seats 12. The width of the horizontal pads 20 is the same as the width of the vertical pads 21. The horizontal pads 20 and the vertical pads 21 are integrated and form an L-shape. The elastic protective pads 19 described above can play an effective buffering role when the sealing plate 3 and the sealing strip 4 contact and seal the opening surface 5 of the measured junction box 27, and can protect the appearance of the product, thus playing an effective protective role.

[0052] In some preferred embodiments, four support legs 25 are fixedly provided at the bottom of the frame 1, and self-locking casters 26 are fixedly provided at the bottom of the support legs 25. The four support legs 25 can stably support the frame 1, and the self-locking casters 26 installed at the bottom of the support legs 25 can facilitate the movement of the entire device.

[0053] The following is a further explanation of the testing process of the airtightness testing device for the enclosure product in this embodiment.

[0054] First, control cylinder 7 to retract the sealing plate 3 to the designated position. Then, place the test chamber product into the placement area 14 between the limiting seat 12 and the sealing plate 3, so that the two sides of the test chamber abut against the limiting seat 12 and the limiting block 13 respectively for limiting. Next, drive the sealing plate 3 and the sealing strip 4 forward through cylinder 7 to contact and seal the opening surface 5 of the test chamber. The opening surface 5 of the manifold 27 is completely sealed by the foam strip around the sealing plate 3. Then, inflate the chamber through the air inlet 6 in the middle of the sealing plate 3 to perform a sealing test (air tightness test to see if there is any leakage) and determine whether the manifold 27 can meet the IP65 protection level required by the manifold 27 product. After the test is completed, control cylinder 7 to retract the sealing plate 3 to the designated position. Remove the tested manifold 27 product and repeat the above steps to perform the next air tightness test.

[0055] When using the above-mentioned airtightness testing device for box products, employees only need to place the workpiece (the box product to be tested) into the placement area 14 of the testing platform 2. There is no need for manual sealing of the holes. The product can be placed manually, and the control switch 11 (pneumatic valve) can be pressed to make the foam strips around the sealing plate 3 completely seal the opening surface 5 of the manifold 27. The operation is easy and the work efficiency is very high.

[0056] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0057] The parts not mentioned in the above embodiments are the same as or can be implemented using existing technologies, and will not be further described here.

[0058] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for testing the airtightness of a box-type product, characterized in that, Includes a frame, with a test platform on the top of the frame, a sealing component and a drive mechanism on one side of the test platform, and a placement area for placing the test chamber on the other side; The sealing assembly includes a sealing plate and a sealing strip. The sealing plate is adapted to the opening surface of the test chamber. The front side of the sealing plate faces the opening surface of the test chamber. The rear side of the sealing plate is connected to the driving mechanism. A sealing strip is fixed around the perimeter of the front side of the sealing plate. The middle of the sealing strip forms a sealing cavity for sealing the opening surface of the test chamber. An air inlet is provided on the sealing plate.

2. The airtightness testing device for a box-type product according to claim 1, characterized in that, The sealing strip is made of expanding foam, and the expanding foam is glued and fixed to the sealing plate.

3. The airtightness testing device for a box-type product according to claim 1, characterized in that, Several drive mechanisms are arranged side by side. Each drive mechanism includes a cylinder, a connecting plate, and a fixed base. The fixed base is fixedly mounted on the test platform. The cylinder is fixedly mounted on the fixed base. The front end of the cylinder shaft is fixedly connected to the rear side of the connecting plate. The front side of the connecting plate is fixedly connected to the rear side of the sealing plate.

4. The airtightness testing device for a box-type product according to claim 3, characterized in that, The drive mechanism also includes a control switch for controlling the cylinders, the control switch being fixed on the test platform and located between any two cylinders.

5. A test device for airtightness of a box-type product according to any one of claims 1-4, characterized in that, The test platform is also equipped with a limiting component for limiting the position of the test box. The limiting component includes a plurality of limiting seats fixed on the test platform. The plurality of limiting seats are arranged side by side and face the sealing plate, and a square placement area is formed between the limiting seats and the sealing plate.

6. The airtightness testing device for a box-type product according to claim 5, characterized in that, The limiting seat includes a limiting plate and a reinforcing plate. The limiting plate includes a horizontal plate and a vertical plate that are vertically connected. The reinforcing plate is connected between the middle of the horizontal plate and the middle of the vertical plate. The horizontal plate is fixed on the test platform, and the vertical plate is directly opposite the sealing plate.

7. The airtightness testing device for a box-type product according to claim 5, characterized in that, The limiting component also includes several limiting blocks fixed on the test platform. The limiting blocks are arranged side by side on one side of the placement area, and each limiting seat and each limiting block are respectively set along two adjacent right-angled sides of the square placement area.

8. The airtightness testing device for a box-type product according to claim 7, characterized in that, The top of the limiting block has a chamfered edge near the edge of the test box to form a chamfered surface.

9. The airtightness testing device for a box-type product according to claim 6, characterized in that, The test platform is also equipped with a protective component, which includes several elastic protective pads. The elastic protective pads include horizontal pads and vertical pads. The vertical pads are located on the side of the vertical plate facing the sealing plate. The horizontal pads are located in the placement area. One end of the horizontal pad is connected to the end of the vertical pad facing the test platform, and the other end of the horizontal pad extends towards the sealing plate to the edge of the placement area.

10. The airtightness testing device for a box-type product according to claim 9, characterized in that, The number of horizontal pads and the number of vertical pads are the same as the number of limiting seats, and the width of the horizontal pads is the same as the width of the vertical pads.

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