Multi-station leak detector

Abstract

The utility model discloses a multi-station leak detector, which comprises a box body, a pressing mechanism, a sealing plate assembly and a plurality of air leakage detection mechanisms, a pressure cavity is formed in the box body, a detection plate is arranged at the top of the box body, a plurality of lower detection grooves are formed in the detection plate and communicated with the pressure cavity, and the box body is connected with a high-pressure air source; the sealing plate assembly comprises a sealing plate which is arranged at the lower end of the downward pressing mechanism, and a plurality of upper detection grooves are formed in the bottom of the sealing plate; the air leakage detection mechanism is arranged on the sealing plate and is communicated with the upper detection groove; the pressing mechanism is arranged above the box body; the pressing mechanism drives the sealing plate to press the detection plate downwards, the upper detection groove is buckled on the corresponding lower detection groove, and the sealing plate seals and presses the wired wiring terminal. The detection plate can load a plurality of wired wiring terminals at one time, and the sealing plate can seal the plurality of wired wiring terminals at the same time, thereby achieving the simultaneous detection of the plurality of wired wiring terminals at one time, greatly improving the efficiency, and achieving the better economical efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of test equipment technical field, especially a kind of multi-station leak detector. BACKGROUND

[0002] In the field of new energy vehicles, underwater equipment, water surface equipment and outdoor equipment, direct liquid cooling technology obtains rapid development, especially in direct liquid cooling battery technology, the sealing of wire terminal is required. For direct liquid cooling battery system, wire terminal not only realizes internal and external conduction, signal transmission and other functions, but also cannot let the liquid coolant in the battery box leak out, and cannot let external moisture, air, corrosive liquid, destructive gas and other into the battery box. Therefore, the sealing performance of wire terminal is very critical, and direct liquid cooling puts forward more stringent requirements for the sealing performance of wire terminal. The current industry detects the sealing of wire terminal itself, which is generally only suitable for detecting single wire terminal before welding. Each time, only a single wire terminal is detected, and the detection efficiency is low. The detection is carried out before welding wire harness, and the leakage caused by welding heat and other factors after welding cannot be found. SUMMARY

[0003] To solve the technical problems of low detection efficiency of wire terminal and terminal in the prior art, one of the purposes of the utility model is to provide a multi-station leak detector, which can detect multiple wire terminals at the same time, find the sealing defects of wire terminals themselves, poor gluing and welding, eliminate the sealing defects after welding, greatly improve the efficiency and have good economic efficiency.

[0004] One of the purposes of the utility model is achieved by the following technical scheme:

[0005] A multi-station leak detector, the multi-station leak detector comprises a box body, a pressing mechanism, a sealing plate assembly and a plurality of air leakage detection mechanisms;

[0006] The box body is provided with a pressure chamber, the top of the box body is provided with a detection plate, the detection plate is provided with a plurality of lower detection grooves for placing wire terminals, the lower detection grooves are communicated with the pressure chamber, and the box body is connected with a high-pressure gas source for filling high-pressure gas into the pressure chamber;

[0007] The pressing mechanism is arranged above the box body;

[0008] The sealing plate assembly comprises a sealing plate, the sealing plate is arranged at the lower end of the pressing mechanism, the bottom of the sealing plate is provided with a plurality of upper detection grooves, and the upper detection grooves and the lower detection grooves are respectively arranged one by one.

[0009] The air leakage detection mechanism is disposed on the sealing plate and is connected to the upper detection groove for detecting whether the wired terminal is leaking.

[0010] The pressing mechanism drives the sealing plate to press down against the detection plate, the upper detection groove is fastened to the corresponding lower detection groove, and the sealing plate seals and presses the wire terminal.

[0011] Optionally, the air leakage detection mechanism includes a connecting pipe, a one-way valve, and a water storage pipe. One end of the connecting pipe is connected to the housing, and the other end is connected to the inlet of the one-way valve. The connecting pipe is connected to the pressure chamber, and the water storage pipe is connected to the outlet of the one-way valve.

[0012] Optionally, the pressing mechanism includes a fixed plate, a lifting rod, a swing rod, and a connecting rod;

[0013] The fixing plate is disposed above the box body, and the lower end of the fixing plate is provided with a sliding sleeve;

[0014] The lifting rod is slidably disposed within the sliding sleeve, and the lower end of the lifting rod is connected to the sealing plate;

[0015] The swing rod is swayably mounted on the upper end of the fixed plate;

[0016] One end of the connecting rod is hinged to the upper end of the lifting rod, and the other end of the connecting rod is hinged to the middle of the swing rod.

[0017] Optionally, the sealing plate assembly further includes a connector, the two ends of which are connected to the sealing plate, and the middle section of the connector is bent upward and protruded.

[0018] The lower end of the lifting rod is connected to the middle section of the connecting piece.

[0019] Optionally, the multi-station leak detector further includes a bracket, which is mounted on the housing or on the detection plate, and the pressing mechanism is mounted on the bracket.

[0020] Optionally, a lower sealing gasket is provided in the lower detection groove, and an upper sealing gasket is provided in the upper detection groove.

[0021] Optionally, a pressure relief mechanism is provided on one side of the housing. The pressure relief mechanism includes a pressure relief pipe, a pressure relief valve, and a diffuser. The pressure relief pipe is located on the side wall of the housing and connects to the pressure chamber. The pressure relief valve is located on the pressure relief pipe, and the diffuser is located at the end of the pressure relief pipe to reduce the air velocity.

[0022] Optionally, the diffuser includes a connecting plate, an outer cylinder, and an inner cylinder. The connecting plate is connected to the pressure relief pipe and has an air inlet communicating with the pressure relief pipe. The outer cylinder and the inner cylinder are fastened to the connecting plate, with the inner cylinder located inside the outer cylinder and fastened to the air inlet of the connecting plate. Both the outer cylinder and the inner cylinder are mesh-like.

[0023] Optionally, the detection plate is provided with a guide rod, and the sealing plate is slidably disposed on the guide rod.

[0024] Optionally, there are two sets of pressing mechanisms and two sets of sealing plate assemblies. The two sets of sealing plate assemblies are respectively arranged in one-to-one correspondence with the two sets of pressing mechanisms, and the upper detection grooves on the two sealing plates are respectively arranged in one-to-one correspondence with each of the lower detection grooves.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0026] In this invention, a lower detection groove is provided on the detection plate, which is connected to the pressure chamber. A leakage detection mechanism is installed on the sealing plate, which is connected to the upper detection groove. After the wired terminal is placed into the lower detection groove, the sealing plate is pushed downward by the pressing mechanism, causing the sealing plate to abut against the detection plate. The upper detection groove is then fastened onto the lower detection groove, and the sealing plate and the detection plate are sealed and pressed together, simultaneously sealing the wired terminal with the detection plate and the sealing plate. Afterward, high-pressure air is injected into the pressure chamber using an external air source. Since the lower detection groove is connected to the pressure chamber, the high-pressure gas injected into the pressure chamber enters the lower detection groove, thereby applying pressure to the wired terminal, specifically to the internal structure of the terminal sleeve. When there is a sealing problem with the wired terminal, the gas in the pressure chamber will pass through the wired terminal and enter the leakage detection mechanism, thereby checking whether the wired terminal is leaking. This allows for the identification of structural defects, poor adhesive application, and sealing defects caused by welding, thus eliminating defective products and improving product quality.

[0027] In addition, in this utility model, the detection plate is a bearing structure for wired terminals, and the pressure chamber is both a high-pressure gas containing structure and a wired terminal harness containing structure. The detection plate and the sealing plate are respectively provided with multiple lower detection slots and upper detection slots. The detection plate can load multiple wired terminals at one time, and the sealing plate can seal multiple wired terminals at the same time, realizing the simultaneous detection of multiple wired terminals, which greatly improves efficiency and has good economic benefits. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the multi-station leak detector of this utility model;

[0029] Figure 2This is an exploded view of the multi-station leak detector of this utility model;

[0030] Figure 3 This is a front sectional view of the multi-station leak detector of this utility model;

[0031] Figure 4 This is a partial cross-sectional view of the multi-station leak detector of this utility model.

[0032] Explanation of reference numerals in the attached diagram:

[0033] 1. Housing; 11. Pressure chamber; 12. Detection plate; 121. Lower detection groove; 13. Lower sealing gasket; 14. Guide rod

[0034] 2. Pressing mechanism; 21. Fixed plate; 211. Sliding sleeve; 22. Lifting rod; 23. Swing rod; 24. Connecting rod;

[0035] 3. Sealing plate assembly; 31. Sealing plate; 311. Upper detection groove; 32. Connector; 33. Upper sealing gasket;

[0036] 4. Leakage detection mechanism; 41. Connecting pipe; 42. Check valve; 43. Water storage pipe;

[0037] 5. Bracket;

[0038] 6. Pressure relief mechanism; 61. Pressure relief pipeline; 62. Pressure relief valve; 63. Diffuser;

[0039] 7. Terminal block with wire; 71. Mounting plate; 72. Terminal sleeve; 73. Terminal core. Detailed Implementation

[0040] The following will refer to the appendices in the embodiments of this application. Figure 1 To be continued Figure 4 The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0041] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0042] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0043] like Figures 1-4 The multi-station leak detector shown is used for inspecting wired terminals 7. The wired terminals 7 generally include a mounting plate 71, a terminal sleeve 72, and a terminal core 73. The terminal sleeve 72 is mounted on the mounting plate 71, specifically vertically mounted on the mounting plate 71, with both ends protruding from the mounting plate 71. The terminal core 73 is disposed within the terminal sleeve 72. The multi-station leak detector includes a housing 1, a pressing mechanism 2, a sealing plate assembly 3, and several leak detection mechanisms 4.

[0044] The housing 1 contains a pressure chamber 11, and a detection plate 12 is located on the top of the housing 1. The detection plate 12 has several lower detection slots 121 for placing the wired terminals 7, specifically for placing the mounting plate 71. The shape of the lower detection slots 121 is adapted to the shape of the wired terminals 7. The lower detection slots 121 are connected to the pressure chamber 11, and the housing 1 is connected to a high-pressure gas source to fill the pressure chamber 11 with high-pressure gas. The pressure chamber 11 is both a high-pressure gas containing structure and a structure for receiving the wired terminals 7. When the wired terminals 7 are placed in the lower detection slots 121, the wire bundle on the wired terminals 7 extends into the pressure chamber, meaning that the pressure chamber 11 is also a structure for receiving the wire bundle of the wired terminals 7.

[0045] The pressing mechanism 2 is located above the housing 1 and is used to drive the sealing plate 31 to move up and down. The sealing plate assembly 3 includes the sealing plate 31, which is located at the lower end of the pressing mechanism 2. The bottom of the sealing plate 31 is provided with several upper detection grooves 311, and the upper detection grooves 311 and the lower detection grooves 121 are respectively arranged one-to-one.

[0046] The air leakage detection mechanism 4 is installed on the sealing plate 31. The air leakage detection mechanism 4 is connected to the upper detection groove 311 and is used to detect whether the wired terminal 7 is leaking.

[0047] The pressing mechanism 2 drives the sealing plate 31 to press down against or tighten the detection plate 12, and the upper detection groove 311 is fastened to the corresponding lower detection groove 121. The sealing plate 31 seals and tightens the wire terminal 7.

[0048] In this invention, the detection plate 12 is provided with a lower detection groove 121, which is connected to the pressure chamber 11. A leakage detection mechanism 4 is disposed on the sealing plate 31 and is connected to the upper detection groove 311. After the wired terminal 7 is placed into the lower detection groove 121, the sealing plate 31 is pushed downwards by the pressing mechanism 2, causing the sealing plate 31 to abut against the detection plate 12. The upper detection groove 311 is then fastened onto the lower detection groove 121, and the sealing plate 31 and the detection plate 12 are sealed together by the upper and lower sealing plates 71, thus sealing the wired terminal 7 with both the detection plate 12 and the sealing plate 31. Afterwards, high-pressure air is injected into the pressure chamber 11 using an external air source. Since the lower detection groove 121 is connected to the pressure chamber 11, the high-pressure gas injected into the pressure chamber 11 enters the lower detection groove 121, thereby applying pressure to the wired terminal 7, specifically to the internal structure of the terminal sleeve 72. When there is a sealing problem with the wired terminal 7, the gas in the pressure chamber 11 will pass through the wired terminal 7 and enter the leakage detection mechanism 4, thereby checking whether the wired terminal 7 is leaking. It can also detect structural defects, poor glue application, and poor sealing caused by welding, thus eliminating defective products and improving product quality.

[0049] In addition, in this utility model, the detection plate 12 is a bearing structure for the wired terminal block 7. The detection plate 12 and the sealing plate 31 are respectively provided with multiple lower detection grooves 121 and upper detection grooves 311. The detection plate 12 can load multiple wired terminal blocks 7 at one time, and the sealing plate 31 can seal multiple wired terminal blocks 7 at the same time, so as to realize the simultaneous detection of multiple wired terminal blocks 7, which greatly improves efficiency and has good economic benefits.

[0050] Specifically, the air leakage detection mechanism 4 can be a flow meter, pressure gauge, etc., used to detect whether the wired terminal 7 is leaking.

[0051] In some embodiments of the leak detection mechanism 4, such as Figure 4As shown, the air leakage detection mechanism 4 includes a connecting pipe 41, a one-way valve 42, and a water storage pipe 43. One end of the connecting pipe 41 is connected to the housing 1, and the other end is connected to the inlet of the one-way valve 42. The connecting pipe 41 is connected to the pressure chamber 11, and the water storage pipe 43 is connected to the outlet of the one-way valve 42. In this embodiment, a one-way valve 42 is provided between the connecting pipe 41 and the water storage pipe 43, so that the water in the water storage pipe 43 will not flow to the connecting pipe 41. When air leakage occurs in the wired terminal 7, air enters the upper detection groove 311 from the lower detection groove 121, and then the air enters the water storage pipe 43 through the connecting pipe 41 and the one-way valve 42. Since the water storage pipe 43 contains water, the rising air bubbles can be clearly seen, thus confirming the sealing performance of the wired terminal 7. The leak detection mechanism 4 in this embodiment has a simple structure. It makes full use of the one-way passage feature of the one-way valve 42, stores water in the water storage pipe 43, and also takes advantage of the phenomenon that gas can easily generate bubbles when it emerges from the liquid, thereby directly detecting leaks.

[0052] The pressing mechanism 2 can be implemented using electric push rods, pneumatic push rods, etc. For example, the electric push rod is mounted on the bracket 5, with its output end facing downwards and connected to the sealing plate 31. In this way, the sealing plate 31 can be automatically controlled to move up and down by means of the electric push rod.

[0053] In some embodiments of the pressing mechanism 2, such as Figure 2 , Figure 3 As shown, the pressing mechanism 2 includes a fixed plate 21, a lifting rod 22, a swing rod 23, and a connecting rod 24. The fixed plate 21 is located above the housing 1, and a sliding sleeve 211 is provided at the lower end of the fixed plate 21. The lifting rod 22 is slidably disposed within the sliding sleeve 211, and the lower end of the lifting rod 22 is connected to the sealing plate 31. The swing rod 23 is swayably disposed at the upper end of the fixed plate 21. One end of the connecting rod 24 is hinged to the upper end of the lifting rod 22, and the other end of the connecting rod 24 is hinged to the middle of the swing rod 23. The swing rod 23 is a manually operated structure. Pressing the swing rod 23 upwards or downwards causes the swing rod 23 to move the connecting rod 24 upwards and downwards, which in turn drives or pushes the lifting rod 22 to rise and fall, and the lifting rod 22 causes the sealing assembly to move upwards and downwards.

[0054] For the aforementioned sealing components, such as Figure 2 As shown, the sealing plate assembly 3 also includes a connector 32, the two ends of which are connected to the sealing plate 31, and the middle section of the connector 32 is bent upwards and protrudes. The lower end of the lifting rod 22 is connected to the middle section of the connector 32.

[0055] In some embodiments of multi-station leak detectors, such as Figure 1As shown, the multi-station leak detector also includes a bracket 5, which is mounted on the housing 1. Specifically, the bracket 5 can be directly mounted on the side wall of the housing 1 or directly mounted on the top of the housing 1, i.e., directly mounted on the detection plate 12. The pressing mechanism 2 is mounted on the bracket 5. The bracket 5 is gantry-shaped and serves as a direct mounting structure for the pressing mechanism 2.

[0056] To improve the sealing effect between the wired terminal 7 and the detection plate 12 during the testing state, and to improve the sealing effect between the wired terminal 7 and the sealing plate 31 during the inspection state, such as Figure 4 As shown, a lower sealing gasket 13 is provided in the lower detection groove 121, and an upper sealing gasket 33 is provided in the upper detection groove 311.

[0057] Of course, in order to further improve the overall sealing effect, a gasket can be set around the lower detection groove 121 on the upper surface of the detection plate 12, or a gasket can be set around the upper detection groove 311 on the lower surface of the sealing plate 31.

[0058] For the aforementioned housing 1, a pressure relief mechanism 6 is provided on one side of housing 1, such as... Figure 3 As shown, the pressure relief mechanism 6 includes a pressure relief pipe 61, a pressure relief valve 62, and a diffuser 63. The pressure relief pipe 61 is located on the side wall of the housing 1 and connects to the pressure chamber 11. The pressure relief valve 62 is located on the pressure relief pipe 61, and the diffuser 63 is located at the end of the pressure relief pipe 61 to reduce the air velocity. After the pressure holding test, the pressure chamber 11 is depressurized, and then the pressing mechanism 2 is operated to move the sealing plate 31 upward. Finally, the wired terminal 7 is removed. The air in the pressure chamber 11 is mostly high-pressure air. If it is directly discharged, the air velocity will be too high, which can easily cause a strong impact on objects near the multi-position leak detector, creating a safety hazard. Therefore, in this embodiment, a diffuser 63 is set downstream of the pressure relief valve 62. The diffuser 63 reduces the air pressure and velocity, facilitating the safe discharge of high-pressure air.

[0059] Specifically, the diffuser 63 includes a connecting plate, an outer cylinder, and an inner cylinder. The connecting plate is connected to the pressure relief pipe 61 and has an air inlet. The outer and inner cylinders are attached to the side of the connecting plate away from the pressure relief pipe 61, with the inner cylinder located inside the outer cylinder and attached to the air inlet of the connecting plate. The outer and inner cylinders are mesh-like. The inner cylinder, attached to the air inlet, directly receives the high-speed airflow discharged from the pressure chamber 11 and performs initial buffering and mesh-like diversion of the airflow. The outer cylinder, located outside the inner cylinder, performs secondary buffering and diversion of the airflow flowing out from the inner cylinder, thereby increasing the direction of airflow and expanding the airflow outlet channel, effectively slowing down the airflow speed, achieving diffusion and deceleration of the high-speed airflow, and improving the safety of exhaust from the pressure chamber 11.

[0060] In addition, to guide the stable and precise movement of the sealing plate 31, in some embodiments of the sealing plate assembly 3, such as Figure 3 As shown, the detection plate 12 is provided with a guide rod 14, and the sealing plate 31 is slidably disposed on the guide rod 14. Specifically, the sealing plate 31 is provided with a guide hole, which is slidably engaged with the guide rod 14. When the pressing mechanism 2 drives the sealing plate 31 to rise and fall, it can guide the sealing plate 31 to rise and fall accurately and stably through the guide rod 14, providing accuracy and stability for sealing the wired terminal 7.

[0061] In some embodiments of multi-station leak detectors, such as Figure 1 , Figure 2 As shown, there are two sets of pressing mechanisms 2, arranged side-by-side on the bracket 5. There are also two sets of sealing plate assemblies 3, each corresponding to one of the two sets of pressing mechanisms 2. Furthermore, the upper detection grooves 311 on the two sealing plates 31 correspond one-to-one with each lower detection groove 121. The detection plate 12 is divided into two inspection areas, each with a lower detection groove 121. Using two sets of pressing mechanisms 2 and sealing plate assemblies 3 increases the number of inspections and improves inspection efficiency.

[0062] The corresponding housing 1 can also be equipped with two pressure chambers 11, located below the two detection areas respectively, to provide high-pressure air to the lower detection slots 121 in the two areas. There are two pressure relief mechanisms 6, located on opposite sides of the housing 1. The pressure relief pipes 61 on the two pressure relief mechanisms 6 are connected to the two pressure chambers 11 respectively, allowing each mechanism to relieve pressure on one of the two chambers 11. The arrangement of two sets of lower pressure mechanisms 2, sealing plate assemblies 3, pressure chambers 11, and pressure relief mechanisms 6 facilitates alternating pressure holding tests and material loading / unloading for the multi-station leak detector, thereby improving detection efficiency.

[0063] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A multi-station leak detector, characterized in that, The multi-station leak detector includes a housing, a pressing mechanism, a sealing plate assembly, and several leak detection mechanisms. The box is equipped with a pressure chamber, and the top of the box is equipped with a detection plate. The detection plate is equipped with several lower detection slots for placing wired terminals. The lower detection slots are connected to the pressure chamber. The box is connected to a high-pressure gas source for filling the pressure chamber with high-pressure gas. The pressing mechanism is located above the housing; The sealing plate assembly includes a sealing plate, which is disposed at the lower end of the pressing mechanism. The bottom of the sealing plate is provided with a plurality of upper detection grooves, and the upper detection grooves and the lower detection grooves are respectively arranged in a one-to-one correspondence. The air leakage detection mechanism is disposed on the sealing plate and is connected to the upper detection groove for detecting whether the wired terminal is leaking. The pressing mechanism drives the sealing plate to press down against the detection plate, the upper detection groove is fastened to the corresponding lower detection groove, and the sealing plate seals and presses the wire terminal.

2. The multi-station leak detector as described in claim 1, characterized in that, The air leakage detection mechanism includes a connecting pipe, a one-way valve, and a water storage pipe. One end of the connecting pipe is connected to the housing, and the other end is connected to the inlet of the one-way valve. The connecting pipe is connected to the pressure chamber, and the water storage pipe is connected to the outlet of the one-way valve.

3. The multi-station leak detector as described in claim 1, characterized in that, The pressing mechanism includes a fixed plate, a lifting rod, a swing rod, and a connecting rod; The fixing plate is disposed above the box body, and the lower end of the fixing plate is provided with a sliding sleeve; The lifting rod is slidably disposed within the sliding sleeve, and the lower end of the lifting rod is connected to the sealing plate; The swing rod is swayably mounted on the upper end of the fixed plate; One end of the connecting rod is hinged to the upper end of the lifting rod, and the other end of the connecting rod is hinged to the middle of the swing rod.

4. The multi-station leak detector as described in claim 3, characterized in that, The sealing plate assembly also includes a connector, the two ends of which are connected to the sealing plate, and the middle section of the connector is bent upward and protrudes. The lower end of the lifting rod is connected to the middle section of the connecting piece.

5. The multi-station leak detector as described in claim 1, characterized in that, The multi-station leak detector also includes a bracket, which is mounted on the housing or on the detection plate, and the pressing mechanism is mounted on the bracket.

6. The multi-station leak detector as described in claim 1, characterized in that, The lower detection groove is provided with a lower sealing gasket, and the upper detection groove is provided with an upper sealing gasket.

7. The multi-station leak detector as described in claim 1, characterized in that, A pressure relief mechanism is provided on one side of the housing. The pressure relief mechanism includes a pressure relief pipe, a pressure relief valve, and a diffuser. The pressure relief pipe is located on the side wall of the housing and connects to the pressure chamber. The pressure relief valve is located on the pressure relief pipe, and the diffuser is located at the end of the pressure relief pipe to reduce the airflow velocity.

8. The multi-station leak detector as described in claim 7, characterized in that, The diffuser includes a connecting plate, an outer cylinder, and an inner cylinder. The connecting plate is connected to the pressure relief pipe and has an air inlet that communicates with the pressure relief pipe. The outer cylinder and the inner cylinder are fastened to the connecting plate, with the inner cylinder located inside the outer cylinder and fastened to the air inlet of the connecting plate. Both the outer cylinder and the inner cylinder are mesh-like.

9. The multi-station leak detector as described in claim 1, characterized in that, The detection plate is provided with a guide rod, and the sealing plate is slidably disposed on the guide rod.

10. The multi-station leak detector as described in claim 1, characterized in that, There are two sets of pressing mechanisms and two sets of sealing plate assemblies. The two sets of sealing plate assemblies are respectively arranged in one-to-one correspondence with the two sets of pressing mechanisms. The upper detection grooves on the two sealing plates are respectively arranged in one-to-one correspondence with each of the lower detection grooves.

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