An airtightness testing device

Abstract

This utility model discloses an airtightness testing device, including a support structure, a testing structure, and an airtightness tester. The testing structure includes a lower mold fixed to the top of the equipment base and an upper mold fixed to the bottom of a transmission structure. The upper mold is connected to the transmission structure mounted on a fixed plate, and the transmission structure drives the upper mold to reciprocate vertically. Air pump assemblies are connected to both the lower and upper molds. A waterproof connector to be tested for airtightness is provided between the upper and lower molds, and the bottom of the upper mold and the top of the lower mold are respectively provided with a connecting groove and a insertion groove for the waterproof connector. The two ends of the waterproof connector communicate with the interior of the upper and lower molds, respectively. A pre-installed airtightness tester for testing the internal air pressure of the mold is connected to both the upper and lower molds. This utility model solves the problem that internal damage cannot be visually identified because the sealing gasket at the installation position of the waterproof connector is generally embedded in the connector.

Description

Technical Field

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

[0002] In recent years, my country's new energy vehicle industry has developed rapidly, promoting its high-quality and sustainable development and accelerating the construction of a strong automotive nation. China's new energy vehicle industry is showing strong momentum, with rapid growth in vehicle matching, technology research and development, and the new energy vehicle consumer market. As an emerging field, with continuous improvements in technology research and development, the three-electric system (battery, motor, and electronic control system) has become a crucial part of new energy vehicles, and the battery pack has become the foundation of new energy.

[0003] As a key component of new energy vehicles, the airtightness of the battery pack is a critical performance indicator to ensure a stable operating environment. The airtightness of the connection between the waterproof connector used in the wiring harness and the battery pack is crucial to ensuring battery pack performance. However, because the sealing gasket at the waterproof connector installation location is generally embedded within the connector, internal damage cannot be visually identified. Therefore, there is an urgent need for an airtightness testing device to quickly confirm the airtightness of the waterproof connector installation to ensure product performance requirements are met. Summary of the Invention

[0004] This invention provides an airtightness testing device to overcome the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] An airtightness testing device, characterized in that,

[0007] This includes the supporting structure, the testing structure, and the airtightness tester;

[0008] The support structure includes an equipment base, and the top of the equipment base is symmetrically provided with support rods, and the top of the support rods is connected to a fixing plate;

[0009] The detection structure includes a lower mold fixed to the top of the equipment base and an upper mold fixed to the bottom of the transmission structure. The upper mold is connected to the transmission structure mounted on the fixed plate and can be driven to reciprocate in the vertical direction through the transmission structure. The lower mold and the upper mold are respectively connected to an air pump assembly for injecting gas into the mold.

[0010] A waterproof connector for airtightness testing is provided between the upper mold and the lower mold. The bottom end of the upper mold and the top end of the lower mold are respectively provided with a connecting groove and a plug groove for the waterproof connector. The two ends of the waterproof connector are respectively connected to the interior of the upper mold and the lower mold. The upper mold and the lower mold are respectively connected to a pre-set airtightness tester for detecting the air pressure inside the mold.

[0011] Furthermore, the top of the lower mold is also provided with a limiting lever, which is symmetrically arranged on both sides of the insertion groove. The limiting lever includes a fastening screw and a limiting rod that is movably connected to the top of the lower mold.

[0012] The limiting rod is used to engage with both sides of the upper mold after the transmission structure drives the upper mold, which is connected to a waterproof connector, to move to the insertion slot of the lower mold for adaptation and connection. The fastening screw is used to fix the limiting rod to the top of the lower mold.

[0013] Furthermore, the straight line containing the center of the connecting groove coincides with the straight line containing the center of the insertion groove.

[0014] Furthermore, the air pump assembly includes a first inflation structure and a second inflation structure;

[0015] The first inflation structure includes a first air pump and a first connecting pipe connected to the output end of the first air pump; the first air pump is fixedly mounted on the fixed plate, and the upper mold has a first connecting port for connecting to the first connecting pipe;

[0016] The second inflation structure includes a second air pump and a second connecting pipe connected to the output end of the second air pump; the second air pump and the first air pump are symmetrically fixedly mounted on the fixed plate, and the lower mold has a reserved second connecting port for connecting to the second connecting pipe.

[0017] Furthermore, the top of the device base is also pre-installed with a switch assembly for driving the transmission structure to open and close.

[0018] Furthermore, an upper mold fixing plate is provided between the transmission structure and the upper mold.

[0019] An airtightness testing device, characterized in that the transmission structure includes hydraulic components symmetrically arranged on a fixed plate, and the output end of the hydraulic rod in the hydraulic components is connected to the upper mold fixed plate.

[0020] Beneficial Effects: This utility model provides an airtightness testing device. The device cleverly uses an airtightness tester to drive two sets of air pump components within the testing structure to work together. During the testing process, the upper mold connected to the waterproof connector is first driven by the transmission structure to move to the insertion slot of the lower mold for adaptation and connection. Then, the two sets of air pumps continuously inject gas into the upper and lower molds installed inside the testing structure according to a preset program. As the gas is continuously injected into the mold, the pressure gradually increases. When the pressure value reaches the preset standard air pressure value, the inflation stops. When the preset time threshold is reached, the air pressure change value inside the lower and upper molds is detected by a preset airtightness tester, thereby realizing the airtightness test of the waterproof connector. Attached Figure Description

[0021] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the airtightness testing device of this utility model;

[0023] Figure 2 This is a first-view structural schematic diagram of the airtightness testing device of this utility model;

[0024] Figure 3 This is a structural schematic diagram of the airtightness testing device of this utility model from a second perspective.

[0025] In the diagram: 1. Support structure; 11. Equipment base; 12. Support rod; 13. Fixing plate; 2. Detection structure; 20. Upper mold fixing plate; 21. Lower mold; 211. Insertion slot; 212. Limiting lever; 213. Second connection port; 22. Upper mold; 221. First connection port; 23. Transmission structure; 24. Air pump assembly; 241. First inflation structure; 2411. First air pump; 2412. First connecting pipe; 242. Second inflation structure; 2421. Second air pump; 2422. Second connecting pipe; 3. Air tightness tester; 4. Switch assembly. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, 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.

[0027] This embodiment provides an airtightness detection device, such as... Figures 1 to 3 As shown, it includes a support structure 1, a detection structure 2, and an airtightness detector 3;

[0028] The support structure 1 includes a device base 11, and the top of the device base 11 is symmetrically provided with support rods 12. The top of the support rods 12 is connected to a fixing plate 13. In this embodiment, the support rods 12 and the fixing plate 13 form a gantry structure, which can provide a base support with high stability and support force for the detection structure 2. The top of the device base 11 is also pre-installed with a switch assembly 4 for driving the transmission structure 23 to open and close. The switch assembly 4 is an electronic control assembly for controlling the reciprocating movement of the transmission structure 23 in the vertical direction. Its structure and electrical connection method are known in the prior art and will not be described in detail here.

[0029] The detection structure 2 includes a lower mold 21 fixed to the top of the equipment base 11 and an upper mold 22 fixed to the bottom of the transmission structure 23. Specifically, an upper mold fixing plate 20 is provided between the transmission structure 23 and the upper mold 22. The transmission structure 23 includes hydraulic components symmetrically arranged on the fixing plate 13, and the output end of the hydraulic rod in the hydraulic component is connected to the upper mold fixing plate 20. The fixing plate 13 can increase the installation area of ​​the structural connection, thereby achieving the stability of the upper mold 22 and the hydraulic rod.

[0030] Furthermore, the upper mold 22 is connected to the transmission structure 23 mounted on the fixed plate 13, and the transmission structure 23 can drive the upper mold 22 to reciprocate in the vertical direction; the lower mold 21 and the upper mold 22 are respectively connected to an air pump assembly 24 for injecting gas into the mold; specifically, the air pump assembly 24 includes a first inflation structure 241 and a second inflation structure 242; the first inflation structure 241 includes a first air pump 2411 and a first connecting pipe 2412 connected to the output end of the first air pump 2411; the first air pump 2411 is fixedly mounted on the fixed plate 13, and the upper mold 22 is reserved with... The first connecting pipe 2412 is connected to the first connecting port 221; the second inflation structure 242 includes a second air pump 2421 and a second connecting pipe 2422 connected to the output end of the second air pump 2421; the second air pump 2421 and the first air pump 2411 are symmetrically fixed on the fixing plate 13, and the lower mold 21 is reserved with a second connecting port 213 for connecting to the second connecting pipe 2422. By performing independent inflation processes on the lower mold 21 and the upper mold 22 respectively, and by setting different desired air pressure values, air pressure values ​​with different pressures in the upper mold 22 and the lower mold 21 are obtained respectively, thereby forming an air pressure difference;

[0031] A waterproof connector for airtightness testing is provided between the upper mold 22 and the lower mold 21. The bottom end of the upper mold 22 and the top end of the lower mold 21 are respectively provided with a connecting groove and a plug groove 211 for the waterproof connector. The straight line where the center of the connecting groove is located coincides with the straight line where the center of the plug groove 211 is located to ensure the alignment of the waterproof connector during installation. The two ends of the waterproof connector are respectively connected to the interior of the upper mold 22 and the lower mold 21. The upper mold 22 and the lower mold 21 are respectively connected to a pre-installed airtightness tester 3 for detecting the air pressure inside the mold. The structure and usage of the airtightness tester 3 are existing known technologies and will not be described in detail here.

[0032] In a specific embodiment, the top of the lower mold 21 is also provided with a limiting lever 212. The limiting lever 212 is symmetrically arranged on both sides of the insertion slot 211. The limiting lever 212 includes a fastening screw and a limiting rod that is movably connected to the top of the lower mold 21. The limiting rod is used to lock onto both sides of the upper mold 22 after the transmission structure 23 drives the upper mold 22, which is connected to the waterproof connector, to move to adapt and connect with the insertion slot 211 of the lower mold 21. The fastening screw is used to fix the limiting rod to the top of the lower mold 21. That is, the two sets of limiting levers 212 are used to lock the two sides of the upper mold 22 respectively. After adjusting the position, the bolts are tightened to fix the two sets of limiting levers 212. In this embodiment, the limiting lever 212 can ensure the firmness of the connection between the lower mold 21, the upper mold 22 and the waterproof connector during the airtightness test of the waterproof connector, so as to avoid low accuracy or incorrect test results due to loose structural connection.

[0033] The beneficial effects of the device described in this embodiment are as follows: This device cleverly utilizes an airtightness detector to drive two sets of air pump components within the testing structure to operate in tandem. During the testing process, the upper mold, connected to a waterproof connector, is first driven by a transmission structure and moved to the insertion slot of the lower mold for fitting and connection. Then, the two sets of air pumps continuously inject gas into the upper and lower molds installed inside the testing structure according to a preset program. As the gas is continuously injected into the molds, the pressure gradually increases. When the pressure reaches a preset standard air pressure value, the inflation stops. At a preset time threshold, a pre-set airtightness detector is used to test the airtightness of the lower and upper molds. If the air pressure change value detected in the lower and upper molds differs from the corresponding preset standard air pressure values, it confirms that the waterproof connector has a poor airtightness problem. This is because a pressure difference exists between the initially set standard air pressure values ​​inside the lower and upper molds. If the waterproof connector has a poor airtightness problem, the high-pressure gas inside the mold will flow to the relatively low-pressure mold, causing a change in the air pressure within the mold. If the waterproof connector does not have a poor airtightness problem, the air pressure values ​​inside the lower and upper molds will not change, thus achieving the airtightness detection of the waterproof connector. The control procedures and methods involved in the control and detection in this embodiment are all existing known technologies and will not be elaborated further here.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An airtightness testing device, characterized in that, It includes a support structure (1), a detection structure (2), and an airtightness tester (3); The support structure (1) includes an equipment base (11), and the top of the equipment base (11) is symmetrically provided with support rods (12), and the top of the support rods (12) is connected to a fixing plate (13). The detection structure (2) includes a lower mold (21) fixed to the top of the equipment base (11) and an upper mold (22) fixed to the bottom of the transmission structure (23). The upper mold (22) is connected to the transmission structure (23) mounted on the fixed plate (13) and can be driven to reciprocate in the vertical direction through the transmission structure (23). The lower mold (21) and the upper mold (22) are respectively connected to an air pump assembly (24) for injecting gas into the mold. A waterproof connector for airtightness testing is provided between the upper mold (22) and the lower mold (21). The bottom end of the upper mold (22) and the top end of the lower mold (21) are respectively provided with a connecting groove and a plug groove (211) for the waterproof connector. The two ends of the waterproof connector are respectively connected to the interior of the upper mold (22) and the lower mold (21). The upper mold (22) and the lower mold (21) are respectively connected to a pre-set airtightness tester (3) for testing the air pressure inside the mold.

2. The air tightness detection device according to claim 1, wherein The lower mold (21) is also provided with a limiting lever (212) at the top. The limiting lever (212) is symmetrically arranged on both sides of the insertion groove (211). The limiting lever (212) includes a fastening screw and a limiting rod that is movably connected to the top of the lower mold (21). The limiting rod is used to snap onto both sides of the upper mold (22) after the transmission structure (23) drives the upper mold (22) connected with the waterproof connector to move to the insertion slot (211) of the lower mold (21) for adaptation and connection. The fastening screw is used to fix the limiting rod to the top of the lower mold (21).

3. The air tightness detection device according to claim 2, wherein The straight line at the center of the connecting groove coincides with the straight line at the center of the insertion groove (211).

4. The air tightness detection device according to claim 3, wherein The air pump assembly (24) includes a first inflation structure (241) and a second inflation structure (242); The first inflation structure (241) includes a first air pump (2411) and a first connecting pipe (2412) connected to the output end of the first air pump (2411); The first air pump (2411) is fixedly installed on the fixed plate (13), and the upper mold (22) is reserved with a first connection port (221) for connection with the first connecting pipe (2412); The second inflation structure (242) includes a second air pump (2421) and a second connecting pipe (2422) connected to the output end of the second air pump (2421); The second air pump (2421) and the first air pump (2411) are symmetrically fixed on the fixed plate (13), and the lower mold (21) is reserved with a second connection port (213) for connection with the second connecting pipe (2422).

5. The air tightness testing apparatus of claim 4, wherein The top of the device base (11) is also pre-installed with a switch assembly (4) for driving the transmission structure (23) to open and close.

6. The air tightness testing apparatus of claim 5, wherein The transmission structure (23) is further provided with an upper die fixing plate (20) between the transmission structure (23) and the upper die (22).

7. The air tightness testing apparatus of claim 6, wherein, The transmission structure (23) comprises hydraulic components symmetrically arranged on the fixing plate (13), and output ends of hydraulic rods of the hydraulic components are connected with the upper die fixing plate (20).

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