A box detection device with an airtightness self-checking function

Abstract

The present invention discloses a box body detection device with an airtightness self-checking function, which relates to the technical field of box body detection. The box body detection device includes a base and a detection box. The detection box is arranged at the middle position of the base, and a top plate is arranged above the detection box. Compared with the current box body detection device, the present invention is provided with an isolation self-checking mechanism. Through the isolation self-checking mechanism, the self-checking of the box body detection device and the product detection can be continuously completed in the same airtight environment. On the one hand, the detection efficiency is improved, and on the other hand, the risk of wear of the detection device is reduced. The present invention is also provided with an induction component and a sealing component. When the airtightness of the product is detected, if a failure occurs in the external gas supply system or the air pressure in the detection box changes too fast due to operation errors, etc., the internal environment of the detection box and the isolation rack can be timely separated through the cooperation of the induction component and the sealing component, so as to prevent the product from deforming.

Description

Technical Field

[0001] The present invention relates to the technical field of box detection, and specifically to a box detection device with an airtightness self-checking function. Background Art

[0002] In industrial production and daily life, strict requirements are imposed on the airtightness of boxes in many fields. From the power battery systems of new energy vehicles to the various device casings of consumer electronics, once the airtightness of the box is poor, it will not only affect the product performance but may also cause safety problems. For example, for the battery boxes used in power battery systems, if the airtightness is poor, it is very likely to lead to serious consequences such as short circuits and fires.

[0003] Currently, there are already many technical solutions for "box detection" on the market. For example, the patents "CN114964636A Electric vehicle battery box airtightness detection device and its use method" and "CN220525260U A battery box airtightness detection device" respectively disclose a means of box detection. However, in the actual use process, in order to ensure the detection accuracy, the detection device often performs a self-check before the formal detection to ensure that there is no leakage in the device itself. However, the self-check of the traditional detection device and the product detection usually need to be carried out separately, and the box needs to be opened and closed each time of detection, which not only takes time but also the frequent mechanical opening and closing will accelerate the wear of the detection device and affect its long-term stability. In addition, the traditional detection device has insufficient product protection mechanism. During the detection process, if the external air supply system fails or there is an operation error resulting in a sudden change in air pressure, it is difficult for the traditional detection device to protect the product in time, and the product is very likely to be deformed or even damaged due to overpressure. Finally, for products undergoing submergence tests, the traditional method usually directly immerses the product in water. However, this operation method is likely to cause missed detection in some areas on the one hand, and on the other hand, if the product is light in weight, it may shake during the detection process, thus affecting the detection accuracy. Summary of the Invention

[0004] The purpose of the present invention is to provide a box detection device with an airtightness self-checking function to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions: A box detection device with an airtightness self-checking function. The box detection device includes a base and a detection box. The detection box is arranged at the middle position of the base. A top plate is arranged above the detection box, and a side plate is arranged on the side of the detection box. At the front and rear ends inside the detection box, a first sealing cover and a second sealing cover are oppositely arranged. An isolation self-checking mechanism is arranged between the first sealing cover and the second sealing cover. A product is arranged inside the isolation self-checking mechanism. A sealing plug is arranged above the first sealing cover, and an air inlet and an air outlet are arranged on the sealing plug. In the present invention, both the top plate and the side plate are detachably connected to the detection box. Before the airtightness detection of the product, the staff can first place the product into the isolation self-checking mechanism, and through the isolation self-checking mechanism, the product is separated from the detection box. Then, the top plate is placed above the detection box, and through the top plate, the detection box is separated from the external environment. Finally, the staff can introduce the detection gas into the detection box through the air inlet, and through the isolation self-checking mechanism, assist the staff to test whether the airtightness between the detection box and the top plate, the first sealing cover, and the second sealing cover is qualified, so as to avoid misjudgment when detecting the airtightness of the product subsequently. When it is tested that the airtightness between the detection box and the top plate, the first sealing cover, and the second sealing cover is qualified, the internal environment of the isolation self-checking mechanism will be automatically connected to the detection box. At this time, the detection gas is introduced into the detection box again through the air inlet, and the airtightness of the product is tested through the change of the air pressure in the detection box. Compared with the self-checking method of the current box detection device, after the self-check of the box detection device in the present invention, the airtightness of the product can be directly detected without the operation of opening the box detection device and then placing the product into the box detection device. Through the above technical solutions, on the one hand, the detection efficiency is significantly improved, and the manual intervention link is reduced. On the other hand, the risk of wear of the detection device caused by frequent opening and closing of the box detection device is reduced.

[0006] Furthermore, a side push cylinder and a rotation cylinder are also arranged on the base. The side push cylinder is connected to the side plate, and the rotation cylinder is connected to the top plate. When the product is placed into the isolation self-checking mechanism, the staff can turn on the side push cylinder and the rotation cylinder. Through the side push cylinder, the side plate is pressed against the detection box, and through the rotation cylinder, the top plate is pressed against the detection box. An aluminum plate is arranged on the top plate, and a pressing plate is arranged on the aluminum plate. There is a gap between the pressing plate and the aluminum plate. When the airtightness of the product is detected, the detection box will be filled with gas. If the air pressure in the detection box is too high, the aluminum plate will expand and bulge, playing a role of anti-deformation. Through the above technical solutions, it can effectively prevent the product from deforming due to excessive air pressure.

[0007] Further, the isolation self-check mechanism includes an isolation frame fixed to the detection box. There are gaps between the isolation frame and the first sealing cover, the second sealing cover, and the top plate. A sealing sliding plate is slidably installed at the top of the isolation frame. A sealing component is provided at one end of the isolation frame close to the first sealing cover. A first pressure detection element is arranged on the outer wall of the isolation frame, and a second pressure detection element is arranged on the inner wall of the isolation frame.

[0008] Further, the sealing component includes a through hole, an installation groove, a partition plate, and a second electromagnet. The installation groove is arranged above the through hole. The second electromagnet is arranged at the upper end inside the installation groove. One end of the partition plate is arranged in the through hole, and the other end of the partition plate is arranged in the installation groove. One end of the partition plate close to the second electromagnet has magnetism, and the partition plate is connected to the installation groove through a compression spring.

[0009] Before the airtightness of the product is detected in the present invention, the staff can open the isolation frame by moving the sealing sliding plate to facilitate the product to be placed into the isolation frame. After the product is placed into the isolation frame, the isolation frame is closed by moving the sealing sliding plate. Then, the top plate is placed above the detection box to separate the detection box from the external environment. Finally, if the staff needs to detect the airtightness of the detection box, they only need to turn off the second electromagnet (when the second electromagnet is turned off, the partition plate blocks the through hole under the action of the compression spring), and then introduce the detection gas into the detection box through the air inlet. The first pressure detection element can measure the air pressure change in the detection box. With the help of the air pressure change in the detection box, the staff can timely know whether the airtightness between the detection box and the top plate, the first sealing cover, and the second sealing cover is qualified. If the airtightness is qualified, the staff can pump out the gas in the detection box until the air pressure in the detection box is the same as the external air pressure. Then, the second electromagnet is turned on, and the partition plate is lifted by the second electromagnet. At this time, the through hole is in an open state (the detection box is connected to the isolation frame). Then, the air pressure in the detection box is gradually increased step by step through the air inlet. After the rated stage of pressurization, pressure is maintained. The first pressure detection element detects the air pressure change in the detection box to facilitate the staff to judge whether the airtightness of the product is qualified. Finally, the present invention is also provided with a second pressure detection element. During the self-check in the detection box, the second pressure detection element can detect whether the air pressure in the isolation frame changes (normally, the air pressure in the isolation frame will not fluctuate), so as to facilitate the staff to timely know the isolation effect of the isolation self-check mechanism itself and avoid misjudging that the airtightness of the detection box is unqualified.

[0010] Further, an induction component is also arranged at one end of the isolation frame close to the first sealing cover, and the induction component is electrically connected to the second electromagnet.

[0011] Further, the induction component includes a housing. A permanent magnet is arranged at the upper end inside the housing. A support block is arranged at the middle position inside the housing. An induction block is arranged at the lower end inside the housing. A support ring is arranged on one side of the induction block close to the permanent magnet. The lower end of the support ring is connected to the induction block through a connecting rod. The side end of the support ring is connected to the support block through a spring piece. An induction coil is arranged on the support ring.

[0012] When the present invention performs airtightness detection on a product, an external air supply system will slowly supply detection gas into the detection box to gradually increase the air pressure in the detection box step by step. When the air pressure in the detection box increases, the induction block will synchronously drive the support ring and the induction coil to rise. At this time, the induction coil will cut the magnetic induction line to generate an induced current (the magnitude of the induced current is positively correlated with the rising speed of the induction coil). The induction coil in the present invention is connected to the control system inside the second electromagnet. When the induction coil moves normally, the control system inside the second electromagnet always controls the second electromagnet to be in the on state. When the moving speed of the induction coil is too fast, the control system inside the second electromagnet will control the second electromagnet to be in the off state. At this time, under the action of the compression spring, the isolation plate will block the through hole so that the detection gas in the detection box will no longer enter the isolation rack. Through the above technical solution, the present invention monitors the air pressure change rate in the detection box through the induction component. When a failure occurs in the external air supply system or there is an operation error by the staff, etc., through the cooperation of the induction component and the sealing component, the internal environments of the detection box and the isolation rack can be separated in time, so as to avoid the phenomenon of uneven stress on the product due to too fast pressurization rate and prevent the product from deforming.

[0013] Further, a suspension component is arranged at the middle position of the sealing slide plate to control the distance between the product and the bottom of the detection box through the suspension component.

[0014] Further, the suspension component includes a mounting seat, a first electromagnet and a suction cup. The mounting seat is arranged above the sealing slide plate. The first electromagnet is arranged at the lower end inside the mounting seat. A receiving groove is arranged at the lower end of the middle position of the sealing slide plate. The working end of the suction cup is arranged in the receiving groove. The non-working end of the suction cup is arranged at the upper end inside the mounting seat and is embedded with a magnetic block.

[0015] When the product is not subjected to the submersion test, a magnetic field that repels the suction cups is generated by the first electromagnet, so that the working ends of the suction cups are always located in the storage grooves, thereby avoiding affecting the movement of the sealing slide plate on the top of the isolation frame. When the product is subjected to the submersion test, the staff can turn off the first electromagnet. Under the action of gravity, the suction cups will move downward, and the product will be sucked and fixed by the suction cups. Then the staff can turn on the first electromagnet to generate a magnetic field that repels the non-working ends of the suction cups. At this time, the suction cups will drive the product to move upward. Through the above technical solution, the present invention can immerse the whole product in water. On the one hand, it ensures that the water pressure borne by each part of the product is uniform. On the other hand, it avoids missed inspection of the area where the product contacts the bottom of the detection box. Finally, the suspension assembly can also ensure the stability of the product and prevent the product from shaking in the water due to its light material.

[0016] Furthermore, a resistance strain gauge is arranged on the wall surface of the aluminum plate, and the resistance strain gauge is connected to an external alarm system. When the present invention conducts airtightness detection on the product, the deformation amplitude of the aluminum plate can be judged through the resistance change of the resistance strain gauge, so as to facilitate the staff to indirectly judge whether the pressure received by the product exceeds the safe range. If it is detected that the deformation amplitude of the aluminum plate exceeds the preset threshold, the external alarm system will be triggered immediately to remind the staff to intervene in time.

[0017] Furthermore, a second sealing strip is arranged at the side end of the detection box. After the second sealing strip is installed at the side end of the detection box, glass glue sealing is carried out to ensure the airtightness of the detection box with the first sealing cover, the second sealing cover and the top plate. A window is arranged on the first sealing cover, and the sealing plug is installed in the window. A first sealing strip is arranged at one end of the sealing plug close to the window. In the present invention, the sealing plug is locked on the window by means of a rivet nut or a wire insert, and the first sealing strip is selected as a nitrile rubber O-ring for sealing.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. Compared with the current box body detection device, the present invention is provided with an isolation self-inspection mechanism. The traditional box body airtightness detection device needs to open and close the box body multiple times during self-inspection and product detection, which is not only time-consuming but also prone to introduce operation errors. However, through the isolation self-inspection mechanism of the present invention, the self-inspection and product detection of the box body detection device can be continuously completed in the same closed environment without opening and closing the detection device midway. Through the above technical solution, on the one hand, the present invention significantly improves the detection efficiency and reduces the manual intervention link. On the other hand, it reduces the risk of wear of the detection device caused by frequent opening and closing of the box body detection device;

[0020] 2. The present invention is also provided with a second pressure detection element, an induction component, and a sealing component. During the self-check process inside the detection box, the second pressure detection element can detect whether the air pressure inside the isolation frame changes, so as to facilitate the staff to know the isolation effect of the isolation self-check mechanism itself in real time and avoid misjudging that the airtightness of the detection box is unqualified. The induction component can monitor the rate of change of the air pressure inside the detection box in real time, and the sealing component can control the communication state between the isolation self-check mechanism and the detection box. When performing the airtightness detection on the product, if there is a failure in the external gas supply system or the air pressure inside the detection box changes too fast due to operation errors, etc., through the cooperation of the induction component and the sealing component, the internal environment of the detection box and the isolation frame can be separated in time to prevent the product from deforming. Through the triple mechanisms of real-time monitoring, rapid response, and precise truncation, the safety and accuracy of the airtightness detection process are ensured;

[0021] 3. The present invention is also provided with an aluminum plate and a suspension component. When performing the airtightness detection on the product, the detection box will be filled with gas. If the air pressure inside the detection box is too high, the aluminum plate will expand and bulge, playing a role in anti-deformation. Through the aluminum plate, the product can be effectively prevented from deforming due to excessive air pressure. In addition, a resistance strain gauge is arranged on the wall surface of the aluminum plate in the present invention. Through the change in the resistance of the resistance strain gauge, the deformation amplitude of the aluminum plate can be judged, and then it is convenient for the staff to indirectly judge whether the pressure received by the product exceeds the safe range. If it is detected that the deformation amplitude of the aluminum plate exceeds the preset threshold, the external alarm system will be immediately triggered to remind the staff to intervene in time. Finally, through the suspension component, it can be ensured that the product is completely immersed in water during the submergence test. On the one hand, it ensures that the water pressure borne by each part of the product is uniform, and on the other hand, it avoids missed detection in the area where the product contacts the bottom of the detection box. Finally, through the suspension component, the stability of the product can also be ensured, and it is avoided that the product is too light in material and shakes in the water. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the external structure of the present invention;

[0023] Figure 2 is a schematic diagram of the position of the detection box of the present invention with the top plate and side plates;

[0024] Figure 3 is a schematic diagram of the installation of the aluminum plate of the present invention;

[0025] Figure 4 is a schematic diagram of the position of the isolation self-check mechanism of the present invention;

[0026] Figure 5 is a schematic diagram of the structure of the detection box of the present invention; <°

[0027] Figure 6 is a schematic diagram of the structure of the sealing plug of the present invention;

[0028] Figure 7 Schematic diagram of the appearance of the isolation self-check mechanism of the present invention;

[0029] Figure 8 Schematic diagram of the product position of the present invention;

[0030] Figure 9 Schematic diagram of the structure of the induction component of the present invention;

[0031] Figure 10 Schematic diagram of the structure of the suspension component of the present invention;

[0032] Figure 11 Schematic diagram of the position of the second pressure detection element of the present invention;

[0033] Figure 12 Schematic diagram of the sealing component of the present invention.

[0034] In the figure: 1, base; 2, side push cylinder; 3, rotary cylinder; 4, top plate; 41, aluminum plate; 5, pressing plate; 6, side plate; 7, detection box; 71, first sealing cover; 711, sealing plug; 712, air inlet; 713, air outlet; 714, first sealing strip; 72, second sealing cover; 73, isolation frame; 731, sealing slide plate; 7311, mounting seat; 7312, first electromagnet; 7313, suction cup; 732, induction component; 7321, housing; 7322, permanent magnet; 7323, induction coil; 7324, support block; 7325, spring piece; 7326, induction block; 7327, support ring; 733, first pressure detection element; 734, second pressure detection element; 735, isolation plate; 736, second electromagnet; 74, second sealing strip; 8, product. Detailed implementation manners

[0035] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0036] Embodiment: As Figures 1-12As shown in the figure, the present invention provides a technical solution, a box body detection device with an airtightness self-checking function. The box body detection device includes a base 1 and a detection box 7. The detection box 7 is arranged at the middle position of the base 1. A top plate 4 is arranged above the detection box 7, and a side plate 6 is arranged on the side of the detection box 7. At the front and rear ends inside the detection box 7, a first sealing cover 71 and a second sealing cover 72 are arranged opposite to each other. An isolation self-checking mechanism is arranged between the first sealing cover 71 and the second sealing cover 72. A product 8 is arranged inside the isolation self-checking mechanism. Above the first sealing cover 71, a sealing plug 711 is arranged. An air inlet 712 and an air outlet 713 are arranged on the sealing plug 711. In the present invention, both the top plate 4 and the side plate 6 are detachably connected to the detection box 7. Before the airtightness detection of the product 8, the staff can first place the product 8 into the isolation self-checking mechanism, and through the isolation self-checking mechanism, the product 8 is separated from the detection box 7. Then, the top plate 4 is placed above the detection box 7, and through the top plate 4, the detection box 7 is separated from the external environment. Finally, the staff can introduce the detection gas into the detection box 7 through the air inlet 712, and through the isolation self-checking mechanism, assist the staff to test whether the airtightness between the detection box 7 and the top plate 4, the first sealing cover 71, and the second sealing cover 72 is qualified, so as to avoid misjudgment when detecting the airtightness of the product 8 subsequently. When it is tested that the airtightness between the detection box 7 and the top plate 4, the first sealing cover 71, and the second sealing cover 72 is qualified, the internal environment of the isolation self-checking mechanism will automatically communicate with the detection box 7. At this time, the detection gas is introduced into the detection box 7 again through the air inlet 712, and the airtightness of the product 8 is tested through the air pressure change in the detection box 7. Compared with the current self-checking method of the box body detection device, after the self-check of the box body detection device in the present invention, the airtightness of the product 8 can be directly detected without opening the box body detection device and then placing the product 8 into the box body detection device. Through the above technical solution, on the one hand, the detection efficiency is significantly improved, and the manual intervention link is reduced. On the other hand, the risk of wear of the detection device caused by frequent opening and closing of the box body detection device is reduced.

[0037] As Figures 1-3 shown, a side push cylinder 2 and a rotary cylinder 3 are also arranged on the base 1. The side push cylinder 2 is connected to the side plate 6, and the rotary cylinder 3 is connected to the top plate 4. When the product 8 is placed into the isolation self-checking mechanism, the staff can start the side push cylinder 2 and the rotary cylinder 3. Through the side push cylinder 2, the side plate 6 presses the detection box 7, and through the rotary cylinder 3, the top plate 4 presses the detection box 7. An aluminum plate 41 is arranged on the top plate 4, and a pressing plate 5 is arranged on the aluminum plate 41. There is a gap between the pressing plate 5 and the aluminum plate 41. When the airtightness of the product 8 is detected, the detection box 7 will be filled with gas. If the air pressure in the detection box 7 is too high, the aluminum plate 41 will expand and bulge, playing a role of anti-deformation. Through the above technical solution, it can effectively prevent the product 8 from deforming due to excessive air pressure.

[0038] As Figure 4 , Figures 7-12 shown, the isolation self-check mechanism includes an isolation frame 73. The isolation frame 73 is fixed to the detection box 7. There are gaps between the isolation frame 73 and the first sealing cover 71, the second sealing cover 72, and the top plate 4. A sealing slide plate 731 is slidably installed on the top of the isolation frame 73. One end of the isolation frame 73 close to the first sealing cover 71 is provided with a sealing component. A first pressure detection element 733 is arranged on the outer wall of the isolation frame 73, and a second pressure detection element 734 is arranged on the inner wall of the isolation frame 73.

[0039] As Figure 4 , Figures 7-12 shown, the sealing component includes a through hole, an installation groove, an isolation plate 735, and a second electromagnet 736. The installation groove is arranged above the through hole. The second electromagnet 736 is arranged at the upper end inside the installation groove. One end of the isolation plate 735 is arranged in the through hole, and the other end of the isolation plate 735 is arranged in the installation groove. One end of the isolation plate 735 close to the second electromagnet 736 has magnetism, and the isolation plate 735 is connected to the installation groove through a compression spring.

[0040] Before the airtightness test of the product 8, the staff can open the isolation frame 73 by moving the sealing slide plate 731 to facilitate the placement of the product 8 into the isolation frame 73. After the product 8 is placed into the isolation frame 73, the isolation frame 73 is closed by moving the sealing slide plate 731. Then, the top plate 4 is placed above the test box 7, and the test box 7 is separated from the external environment through the top plate 4. Finally, if the staff needs to test the airtightness of the test box 7, they only need to close the second electromagnet 736 (when the second electromagnet 736 is closed, the isolation plate 735 blocks the through hole under the action of the compression spring), and then introduce the test gas into the test box 7 through the air inlet 712. The first pressure detection element 733 can measure the air pressure change in the test box 7. With the help of the air pressure change in the test box 7, the staff can timely know whether the airtightness between the test box 7, the top plate 4, the first sealing cover 71, and the second sealing cover 72 is qualified. If the airtightness is qualified, the staff can extract the gas in the test box 7 until the air pressure in the test box 7 is consistent with the external air pressure. Then, the second electromagnet 736 is turned on, and the isolation plate 735 is lifted by the second electromagnet 736. At this time, the through hole is in an open state (the test box 7 is connected to the isolation frame 73). Then, the air pressure in the test box 7 is gradually increased step by step through the air inlet 712. After the rated stage of pressurization, pressure is maintained, and the first pressure detection element 733 detects the air pressure change in the test box 7 to facilitate the staff to judge whether the airtightness of the product 8 is qualified. Finally, the present invention is also provided with a second pressure detection element 734. During the self-check process in the test box 7, the second pressure detection element 734 can detect whether the air pressure in the isolation frame 73 changes (under normal circumstances, the air pressure in the isolation frame 73 will not fluctuate), so as to facilitate the staff to timely know the isolation effect of the isolation self-check mechanism itself and avoid misjudging that the airtightness of the test box 7 is unqualified.

[0041] As Figure 4 、 Figure 9 shown, an induction component 732 is further provided at one end of the isolation frame 73 close to the first sealing cover 71, and the induction component 732 is electrically connected to the second electromagnet 736.

[0042] As Figure 4 、 Figure 9 shown, the induction component 732 includes a housing 7321. A permanent magnet 7322 is provided at the upper end inside the housing 7321. A support block 7324 is provided at the middle position inside the housing 7321. An induction block 7326 is provided at the lower end inside the housing 7321. A support ring 7327 is provided on one side of the induction block 7326 close to the permanent magnet 7322. The lower end of the support ring 7327 is connected to the induction block 7326 through a connecting rod. The side end of the support ring 7327 is connected to the support block 7324 through a spring piece 7325. An induction coil 7323 is provided on the support ring 7327.

[0043] When the present invention conducts an airtightness test on the product 8, the external gas supply system will slowly transport the test gas into the test chamber 7 to gradually increase the air pressure in the test chamber 7 in a stepwise manner. When the air pressure in the test chamber 7 increases, the induction block 7326 will synchronously drive the support ring 7327 and the induction coil 7323 to rise. At this time, the induction coil 7323 will cut the magnetic induction line to generate an induction current (the magnitude of the induction current is positively correlated with the rising speed of the induction coil 7323). The induction coil 7323 in the present invention is connected to the control system inside the second electromagnet 736. When the induction coil 7323 moves normally, the control system inside the second electromagnet 736 always controls the second electromagnet 736 to be in the on state. When the moving speed of the induction coil 7323 is too fast, the control system inside the second electromagnet 736 will control the second electromagnet 736 to be in the off state. At this time, under the action of the compression spring, the isolation plate 735 will block the through hole so that the test gas in the test chamber 7 will no longer enter the isolation frame 73. Through the above technical solution, the present invention monitors the air pressure change rate in the test chamber 7 through the induction component 732. When a failure occurs in the external gas supply system or there is an operation error by the staff, etc., through the cooperation of the induction component 732 and the sealing component, the internal environments of the test chamber 7 and the isolation frame 73 can be separated in time, so as to avoid the phenomenon that the product 8 is unevenly stressed due to too fast pressurization rate and prevent the product 8 from deforming.

[0044] As Figure 4 、 Figure 10 shown, a suspension component is provided at the middle position of the sealing slide plate 731 to control the distance between the product 8 and the bottom of the test chamber 7.

[0045] As Figure 4 、 Figure 10 shown, the suspension component includes a mounting base 7311, a first electromagnet 7312, and a suction cup 7313. The mounting base 7311 is arranged above the sealing slide plate 731. The first electromagnet 7312 is arranged at the lower end inside the mounting base 7311. A receiving groove is provided at the lower end of the middle position of the sealing slide plate 731. The working end of the suction cup 7313 is arranged in the receiving groove, and the non-working end of the suction cup 7313 is arranged at the upper end inside the mounting base 7311 and is inlaid with a magnetic block.

[0046] When the product 8 is not subjected to the submergence test, a magnetic field that repels the suction cup 7313 is generated by the first electromagnet 7312 so that the working end of the suction cup 7313 is always located in the receiving groove (as Figure 10As shown in the figure, it is further avoided to affect the movement of the sealing slide plate 731 on the top of the isolation frame 73. When the product 8 is subjected to a submersible test, the staff can turn off the first electromagnet 7312. Under the action of gravity, the suction cup 7313 will move downward, and the product 8 will be sucked and fixed by the suction cup 7313. Then the staff can turn on the first electromagnet 7312 to make the first electromagnet 7312 generate a magnetic field that repels the non-working end of the suction cup 7313. At this time, the suction cup 7313 will drive the product 8 to move upward. Through the above technical solution, the present invention can make the product 8 be completely immersed in water. On the one hand, it ensures that the water pressure borne by each part of the product 8 is uniform. On the other hand, it avoids missed detection in the area where the product 8 contacts the bottom of the detection box 7. Finally, the suspension assembly can also ensure the stability of the product 8 and avoid the phenomenon that the product 8 shakes in water due to its light material.

[0047] As Figure 3 shown, a resistance strain gauge is provided on the wall surface of the aluminum plate 41, and the resistance strain gauge is connected to an external alarm system. When the present invention performs an airtightness test on the product 8, the deformation amplitude of the aluminum plate 41 can be judged through the resistance change of the resistance strain gauge, so as to facilitate the staff to indirectly judge whether the pressure received by the product 8 exceeds the safe range. If it is detected that the deformation amplitude of the aluminum plate 41 exceeds the preset threshold, the external alarm system will be immediately triggered to remind the staff to intervene in time.

[0048] As Figure 5 、 Figure 6 shown, a second sealing strip 74 is provided at the side end of the detection box 7. After the second sealing strip 74 is installed at the side end of the detection box 7, it is sealed with glass glue to ensure the sealing performance of the detection box 7 with the first sealing cover 71, the second sealing cover 72, and the top plate 4. A window is provided on the first sealing cover 71, and a sealing plug 711 is installed in the window. A first sealing strip 714 is provided at one end of the sealing plug 711 close to the window. In the present invention, the sealing plug 711 is locked on the window by means of a blind rivet nut or a wire thread insert, and the first sealing strip 714 is selected as a nitrile rubber O-ring for sealing.

[0049] Working principle of the present invention: During operation, the staff needs to first place the product 8 into the isolation rack 73, then move the sealing slide plate 731 to close the isolation rack 73, and then place the top plate 4 above the detection box 7 to separate the detection box 7 from the external environment through the top plate 4. Before detecting the air tightness of the product 8, the staff needs to first introduce the detection gas into the detection box 7. The first pressure detection element 733 can measure the air pressure change in the detection box 7 to determine whether the air tightness between the detection box 7 and the top plate 4, the first sealing cover 71, and the second sealing cover 72 is qualified. If the air tightness is qualified, the staff can extract the gas in the detection box 7 until the air pressure in the detection box 7 is the same as the external air pressure. Then, the second electromagnet 736 is turned on, and the isolation plate 735 is lifted by the second electromagnet 736. At this time, the detection box 7 is connected to the isolation rack 73. Finally, the external gas supply system will slowly supply the detection gas into the detection box 7 to gradually increase the air pressure in the detection box 7 in a stepwise manner. The induction component 732 monitors the air pressure change rate in the detection box 7. When the external gas supply system fails or the air pressure in the detection box 7 changes too fast due to operation errors, etc., the cooperation of the induction component 732 and the sealing component can timely isolate the internal environments of the detection box 7 and the isolation rack 73 to prevent the product 8 from deforming. When the air pressure change rate in the detection box 7 is normal, the first pressure detection element 733 detects the air pressure change in the detection box 7 to facilitate the staff to determine whether the air tightness of the product 8 is qualified.

[0050] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A box detection device with an airtightness self-checking function, characterized in that: The box detection device includes a base (1) and a detection box (7). The detection box (7) is arranged at the middle position of the base (1). Above the detection box (7), there is a top plate (4). On the side of the detection box (7), there is a side plate (6). At the front and rear ends inside the detection box (7), a first sealing cover (71) and a second sealing cover (72) are oppositely arranged. Between the first sealing cover (71) and the second sealing cover (72), there is an isolation self-checking mechanism. Inside the isolation self-checking mechanism, there is a product (8). Above the first sealing cover (71), there is a sealing plug (711). On the sealing plug (711), there are an air inlet (712) and an air outlet (713). The isolation self-checking mechanism includes an isolation frame (73). At one end of the isolation frame (73) close to the first sealing cover (71), there is a sealing component. The sealing component includes a through hole, an installation groove, an isolation plate (735), and a second electromagnet (736). The installation groove is arranged above the through hole. The second electromagnet (736) is arranged at the upper end inside the installation groove. One end of the isolation plate (735) is arranged in the through hole, and the other end of the isolation plate (735) is arranged in the installation groove. One end of the isolation plate (735) close to the second electromagnet (736) has magnetism. The isolation plate (735) is connected to the installation groove through a compression spring.

2. The box detection device with an airtightness self-checking function according to claim 1, characterized in that: On the base (1), there are also a side push cylinder (2) and a rotary cylinder (3). The side push cylinder (2) is connected to the side plate (6), and the rotary cylinder (3) is connected to the top plate (4). By means of the side push cylinder (2) and the rotary cylinder (3), the side plate (6) and the top plate (4) are closely attached to the detection box (7). On the top plate (4), there is an aluminum plate (41). On the aluminum plate (41), there is a pressing plate (5). There is a gap between the pressing plate (5) and the aluminum plate (41).

3. The box detection device with an airtightness self-check function according to claim 1, characterized in that: There are gaps between the isolation frame (73) and the first sealing cover (71), the second sealing cover (72), and the top plate (4). A sealing sliding plate (731) is slidably installed on the top of the isolation frame (73). A first pressure detection element (733) is arranged on the outer wall of the isolation frame (73), and a second pressure detection element (734) is arranged on the inner wall of the isolation frame (73).

4. A box detection device with an airtightness self-check function according to claim 1, characterized in that: At one end of the isolation frame (73) close to the first sealing cover (71), there is also an induction component (732). The induction component (732) is electrically connected to the second electromagnet (736). The air pressure change rate inside the detection box (7) is monitored through the induction component (732).

5. The box detection device with an airtightness self-checking function according to claim 4, characterized in that: The induction component (732) includes a housing (7321). At the upper end inside the housing (7321), a permanent magnet (7322) is provided. At the middle position inside the housing (7321), a support block (7324) is provided. At the lower end inside the housing (7321), an induction block (7326) is provided. On one side of the induction block (7326) close to the permanent magnet (7322), a support ring (7327) is provided. The lower end of the support ring (7327) is connected to the induction block (7326) through a connecting rod. The side end of the support ring (7327) is connected to the support block (7324) through a spring piece (7325). An induction coil (7323) is provided on the support ring (7327). The induction coil (7323) is connected to the control system inside the second electromagnet (736).

6. The box body detection device with an airtightness self-checking function according to claim 3, wherein: A suspension component is provided at the middle position of the sealing slide plate (731). The distance between the product (8) and the bottom of the detection box (7) is controlled through the suspension component.

7. The box detection device with an airtightness self-checking function according to claim 6, characterized in that: The suspension component includes a mounting seat (7311), a first electromagnet (7312), and a suction cup (7313). The mounting seat (7311) is provided above the sealing slide plate (731). The first electromagnet (7312) is provided at the lower end inside the mounting seat (7311). A receiving groove is provided at the lower end of the middle position of the sealing slide plate (731). The working end of the suction cup (7313) is arranged in the receiving groove. The non-working end of the suction cup (7313) is arranged at the upper end inside the mounting seat (7311) and is inlaid with a magnetic block.

8. A box detection device with an airtightness self-checking function according to claim 2, characterized in that: A resistance strain gauge is provided on the wall surface of the aluminum plate (41). The resistance strain gauge is connected to an external alarm system.

9. The box body detection device with an airtightness self-checking function according to claim 1, wherein: A second sealing strip (74) is provided at the side end of the detection box (7). A window is provided on the first sealing cover (71). The sealing plug (711) is installed in the window. A first sealing strip (714) is provided at one end of the sealing plug (711) close to the window.

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