Valve leakage testing device and detection equipment for new energy automobile parts

Abstract

The utility model provides a valve leakage testing device and detection equipment for new energy automobile parts. The valve leakage testing device is used for air tightness detection of a valve and comprises a rack, a driving assembly, a pressing assembly, a filling block and a positioning block, the driving assembly comprises a first air cylinder, the positioning block is provided with a containing cavity, the valve is located in the containing cavity, and the valve is connected with the filling block and the positioning block in a sealed mode; the driving assembly further comprises a second air cylinder, and the second air cylinder is fixedly connected to the bottom of the rack. The valve is in sealed connection with the filling block and the positioning block, so that the valve is sealed and isolated from the outside air, and the hydraulic cavity of the valve is sealed and isolated from the motor cavity, that is, the airtightness detection of the valve is performed under the condition of fitting the assembly environment of the valve, the detection result is matched with the actual application scene, and the leakage test accuracy is improved. Furthermore, the valve is pressed and automatically ejected through the first cylinder and the second cylinder, and an operator only needs to place and take the product, so that the leakage test time is shortened, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air tightness detection of die castings, and in particular to a valve leak test device and detection equipment for new energy vehicle accessories. Background Art

[0002] The sealing performance of the motor is crucial to the normal operation of the motor. If the motor seals poorly, external impurities will enter the motor and cause motor failure. In the air tightness test of the motor, the air tightness test of the motor valve housing is particularly important. If the motor valve cannot ensure air tightness, the air tightness of the entire motor cannot be guaranteed, causing dust, moisture and other impurities to enter the motor, causing corrosion and wear of key parts such as the coils and bearings inside the motor, reducing the service life of the motor. Furthermore, if the motor seals poorly, leakage will occur, which will bring safety hazards to the equipment and personnel using the motor.

[0003] In order to solve the above problems, a Chinese patent with application number CN202121187456.5 discloses an air tightness detection device for automotive aluminum alloy die-castings, including a base, a loading plate fixedly connected to the top of the base, a limiting shaft fixedly connected to the top of the loading plate, and a limiting plate slidably connected to the outer side of the limiting shaft. In the utility model, the rubber pad, the limiting ring, the first rubber ring, the second rubber ring, and the third rubber ring are set, and the die-casting can be limited and fixed by the pressing block to ensure stability during the detection process. At the same time, the die-casting can be sealed under the interaction of the rubber pad, the first rubber ring, the second rubber ring and the third rubber ring to ensure that the die-casting will not leak during the test.

[0004] However, the above detection device does not fit the assembly environment of the die casting when detecting the air tightness of the die casting, but simply forms an integral closed space for detecting the air tightness by arranging rubber rings and rubber pads in the detection space, so that the leak detection accuracy is not high. Furthermore, the above device needs to manually use a handle to rotate the screw to squeeze each rubber ring and rubber pad to form a closed space, so the manual operation wastes time and makes the detection efficiency low.

[0005] Therefore, there is a need for a valve leak testing device that can fit the valve assembly environment to improve the leak testing accuracy and has high detection efficiency. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a valve leak testing device that can fit the valve assembly environment to improve the leak testing accuracy and has a high detection efficiency.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A valve leak test device, used for air tightness detection of valves, the valve leak test device comprises a frame, a driving assembly, a pressing assembly, a filling block and a positioning block, the driving assembly comprises a first cylinder, the first cylinder is fixedly connected to the top of the frame, one end of the pressing assembly is connected to the first cylinder, the other end of the pressing assembly is connected to the filling block, the positioning block is arranged opposite to the filling block, and the positioning block is provided with a containing cavity;

[0009] The valve is sealed and connected to the filling block and the positioning block respectively;

[0010] The driving assembly also includes a second cylinder, which is fixedly connected to the bottom of the frame.

[0011] In one embodiment, the positioning block is provided with a first positioning pin, a second positioning pin and a sealing column, the first positioning pin is located at the top of the positioning block, and the second positioning pin and the sealing column are both located in the accommodating cavity.

[0012] In one embodiment, the valve leakage testing device further comprises a sealing ring, which is used for sealing connection between the valve and the filling block, and the sealing ring is also used for sealing connection between the valve and the positioning block.

[0013] In one embodiment, the pressing assembly includes a first pressing rod, a first pressing seat, a first connecting plate, a second connecting plate and a second pressing rod, the first pressing rod is connected to the first cylinder, the first pressing seat is fixedly connected to the first pressing rod, the first connecting plate is fixedly connected to the first pressing seat, and the two sides of the second connecting plate are respectively fixedly connected to the first connecting plate and the second pressing rod.

[0014] In one embodiment, the valve leakage testing device also includes a guide assembly, which includes a first guide seat, a second guide seat and a guide column, the first guide seat is fixedly connected to the top of the frame, the second guide seat is fixedly connected to the first connecting plate, the top of the frame is provided with a first through hole, the first guide seat is provided with a first guide hole, the second guide seat is provided with a second guide hole, the guide column passes through the first through hole, the first guide hole and the second guide hole in sequence and is fixedly connected to the first connecting plate.

[0015] In one embodiment, the valve leakage testing device further includes a limit assembly, the limit assembly includes a limit rod and a limit sleeve, the limit sleeve is fixedly connected to the first connecting plate, and the limit rod is threadedly connected to the limit sleeve.

[0016] In one embodiment, the second pressing rod is provided with an elastic member, and the elastic member is sleeved on the second pressing rod.

[0017] In one embodiment, there are a plurality of the second pressing rods, and the plurality of the second pressing rods are disposed around the top of the filling block.

[0018] In one embodiment, the valve leakage testing device also includes a striking assembly, which includes a connecting seat, a striking rod and a striking cylinder. The connecting seat is fixedly connected to the bottom of the frame, the striking cylinder is fixedly connected to the connecting seat, and the striking rod is connected to the striking cylinder.

[0019] A detection device for new energy automobile accessories comprises the valve leak test device described in any one of the above embodiments.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] 1. In the above-mentioned valve leak test device, the valve is located in the accommodating chamber, and the valve is sealed and connected to the filling block and the positioning block respectively. The filling block is used to fill the internal space of the valve, and the shape of the accommodating chamber is adapted to the shape of the valve, so that the accommodating chamber is adapted to the actual installation environment of the valve. The valve is sealed and connected to the filling block, and the valve is sealed and connected to the positioning block, so that the valve is isolated from the outside air, and the hydraulic chamber and the motor chamber of the valve are also sealed and isolated, so that the operator can detect the hydraulic chamber and the motor chamber of the valve respectively. The valve leak test device performs air tightness detection of the valve under the condition of fitting the assembly environment of the valve, so that the detection result matches the actual application scenario, and the accuracy of the leak test is improved.

[0022] 2. The driving assembly also includes a first cylinder and a second cylinder. The first cylinder is fixedly connected to the top of the frame, and the second cylinder is fixedly connected to the bottom of the frame. When the valve is placed in the accommodating chamber, the first cylinder automatically presses the valve to detect air tightness. When the test is completed, the second cylinder automatically pushes out the valve to facilitate the operator to take out the product. During the use of the device, the operator only needs to put and take the product, which shortens the leak test time and improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 A schematic structural diagram of a valve leakage test device according to an embodiment;

[0025] Figure 2 for Figure 1 An enlarged schematic diagram of the valve leak test device at point A shown;

[0026] Figure 3 for Figure 2 A cross-sectional view of the valve leak test device along line BB shown;

[0027] Figure 4 for Figure 1 The structural schematic diagram of the positioning block of the valve leakage testing device shown;

[0028] Figure 5 for Figure 1 Another structural schematic diagram of the valve leak testing device shown;

[0029] Figure 6 for Figure 1 A schematic diagram of the structure of a valve detected by the valve leak testing device shown. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] The present disclosure provides a valve leakage testing device, which is used for detecting the air tightness of the valve. The valve leakage testing device includes a frame, a driving assembly, a pressing assembly, a filling block and a positioning block. The driving assembly includes a first cylinder, which is fixedly connected to the top of the frame, one end of the pressing assembly is connected to the first cylinder, and the other end of the pressing assembly is connected to the filling block. The positioning block and the filling block are arranged opposite to each other, and the positioning block is provided with an accommodating cavity; the valve is located in the accommodating cavity, and the valve is respectively sealed and connected to the filling block and the positioning block; the driving assembly also includes a second cylinder, which is fixedly connected to the bottom of the frame.

[0034] In the above-mentioned valve leak test device, the valve is located in the accommodating chamber, and the valve is sealed and connected with the filling block and the positioning block respectively. The filling block is used to fill the internal space of the valve, and the shape of the accommodating chamber and the valve is adapted, so that the accommodating chamber is adapted to the actual installation environment of the valve. The valve is sealed and connected with the filling block, and the valve is sealed and connected with the positioning block, so that the valve is isolated from the outside air, and the hydraulic chamber and the motor chamber of the valve are also sealed and isolated, so that the operator can detect the hydraulic chamber and the motor chamber of the valve respectively. The valve leak test device performs air tightness detection of the valve under the condition of fitting the assembly environment of the valve, so that the detection result matches the actual application scenario, and improves the accuracy of the leak test. Further, the drive assembly also includes a first cylinder and a second cylinder, the first cylinder is fixedly connected to the top of the frame, and the second cylinder is fixedly connected to the bottom of the frame. When the valve is placed in the accommodating chamber, the valve is automatically pressed by the first cylinder to detect the air tightness. When the detection is completed, the second cylinder automatically pushes out the valve, which is convenient for the operator to take out the product. During the use of the device, the operator only needs to put and take the product, which shortens the leak test time and improves the detection efficiency.

[0035] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0036] like Figures 1 to 6 As shown, a valve leakage test device 10 of an embodiment includes a frame 100, a driving assembly 200, a pressing assembly 300, a filling block 400 and a positioning block 500. The driving assembly 200 includes a first cylinder 210, and the first cylinder 210 is fixedly connected to the top of the frame 100. One end of the pressing assembly 300 is connected to the first cylinder 210, and the other end of the pressing assembly 300 is connected to the filling block 400. The positioning block 500 is arranged opposite to the filling block 400, and the positioning block 500 is provided with a receiving cavity 501.

[0037] The valve 20 is located in the accommodating chamber 501, and the valve 20 is sealedly connected to the filling block 400 and the positioning block 500 respectively;

[0038] The driving assembly 200 further includes a second cylinder 220 , which is fixedly connected to the bottom of the frame 100 .

[0039] In this embodiment, the leak test process of the valve 20 is as follows: first, the actual installation environment of the valve 20 is simulated, and the O-type rubber sealing ring is first installed on the valve 20, and then the valve 20 is placed in the accommodating chamber 501 of the positioning block 500, and the first cylinder 210 is started. The first cylinder 210 drives the pressing assembly 300 to press down, and the pressing assembly 300 drives the filling block 400 to press down and fill the internal space of the valve 20. The O-type rubber sealing ring is squeezed and sealed by the inner wall around the accommodating chamber 501 and the valve 20, and the circumference of the filling block 400 and the bottom of the accommodating chamber 501 are also provided with O-type rubber sealing rings, all O-type rubber sealing rings are squeezed and sealed by the filling block 400, the positioning block 500 and the valve 20, so that the valve 20 is sealed and isolated from the outside air, and the hydraulic chamber 20a and the motor chamber 20b of the valve 20 are also sealed and isolated, and then the air tightness of the hydraulic chamber 20a is tested by the air tightness tester first, and then the air tightness of the motor chamber 20b is tested. After the detection is completed, the second cylinder 220 automatically pushes out the valve 20, and the valve 20 drives the filling block 400 and the pressing assembly 300 to move up and reset. After the operator takes out the valve 20, he will test the next valve 20.

[0040] In the above-mentioned valve leakage test device 10, the valve 20 is located in the accommodating chamber 501, and the valve 20 is sealed and connected to the filling block 400 and the positioning block 500 respectively. The filling block 400 is used to fill the internal space of the valve 20, and the accommodating chamber 501 is adapted to the shape of the valve 20, so that the accommodating chamber 501 is adapted to the actual installation environment of the valve 20. The valve 20 is sealed and connected to the filling block 400, and the valve 20 is sealed and connected to the positioning block 500, so that the valve 20 is isolated from the outside air, and the hydraulic chamber 20a and the motor chamber 20b of the valve 20 are also sealed and isolated, so that the operator can detect the hydraulic chamber 20a and the motor chamber 20b of the valve 20 respectively. The valve leakage test device 10 performs air tightness detection of the valve 20 under the condition of fitting the assembly environment of the valve 20, so that the detection result matches the actual application scenario, and the accuracy of the leakage test is improved. Furthermore, the driving assembly 200 further includes a first cylinder 210 and a second cylinder 220, wherein the first cylinder 210 is fixedly connected to the top of the frame 100, and the second cylinder 220 is fixedly connected to the bottom of the frame 100. When the valve 20 is placed in the accommodating chamber 501, the first cylinder 210 automatically presses the valve 20 to detect air tightness, and when the detection is completed, the second cylinder 220 automatically pushes out the valve 20, making it convenient for the operator to take out the product. During the use of the device, the operator only needs to put and take out the product, which shortens the leak test time and improves the detection efficiency.

[0041] like Figure 4As shown, in one embodiment, the positioning block 500 is provided with a first positioning pin 510, a second positioning pin 520 and a sealing column 530, the first positioning pin 510 is located at the top of the positioning block 500, and the second positioning pin 520 and the sealing column 530 are both located in the accommodating chamber 501. In this embodiment, the valve 20 is provided with a first positioning hole 201 and a second positioning hole 202, and the operator can accurately place the product into the accommodating chamber 501 according to the first positioning pin 510 corresponding to the first positioning hole 201 and the second positioning pin 520 corresponding to the second positioning hole 202, so that the operator can place the valve 20 conveniently. The sealing column 530 is located at the center of the accommodating chamber 501 and fills the hydraulic chamber 20b of the valve 20. The sealing column 530 is sleeved with an O-type rubber sealing ring, which is squeezed and sealed by the sealing column 530 and the valve 20, so that the hydraulic chamber 20a and the motor chamber 20b of the valve 20 are sealed and isolated.

[0042] like Figure 2 and Figure 3 As shown, in one embodiment, the valve leakage test device 10 further includes a sealing ring 30, which is used for sealing connection between the valve 20 and the filling block 400, and the sealing ring 30 is also used for sealing connection between the valve 20 and the positioning block 500. In this embodiment, there are multiple sealing rings 30, and the multiple sealing rings 30 are all O-type rubber sealing rings. The O-type rubber sealing ring is a deformable soft structure, which can achieve a good sealing effect when squeezed to ensure the accuracy of airtightness detection.

[0043] like Figure 1 and Figure 5 As shown, in one embodiment, the pressing assembly 300 includes a first pressing rod 310, a first pressing seat 320, a first connecting plate 330, a second connecting plate 340 and a second pressing rod 350. The first pressing rod 310 is connected to the first cylinder 210, the first pressing seat 320 is fixedly connected to the first pressing rod 310, the first connecting plate 330 is fixedly connected to the first pressing seat 320, and the two sides of the second connecting plate 340 are respectively fixedly connected to the first connecting plate 330 and the second pressing rod 350. In this embodiment, during the pressing process of the valve leakage testing device 10, the pressing cylinder drives the first pressing rod 310 to move downward, the first pressing rod 310 drives the first pressing seat 320 to move downward, the first pressing seat 320 drives the first connecting plate 330 to move downward, the first connecting plate 330 drives the second connecting plate 340 to move downward, and then the second connecting plate 340 drives the second pressing rod 350 to press downward.

[0044] like Figure 1 and Figure 5As shown, in one embodiment, the valve leakage test device 10 further includes a guide assembly 600, the guide assembly 600 includes a first guide seat 610, a second guide seat 620 and a guide column 630, the first guide seat 610 is fixedly connected to the top of the frame 100, the second guide seat 620 is fixedly connected to the first connecting plate 330, the top of the frame 100 is provided with a first through hole 101, the first guide seat 610 is provided with a first guide hole (not shown), the second guide seat 620 is provided with a second guide hole (not shown), the guide column 630 passes through the first through hole 101, the first guide hole and the second guide hole in sequence and is fixedly connected to the first connecting plate 330. In this embodiment, in the process of the valve leakage test device 10 being continuously pressed down and moved up to reset, the guide column 630 repeatedly passes through the first through hole 101 back and forth to play the role of directional pressing and directional resetting, that is, the guide assembly 600 plays a guiding role in the operation of the valve leakage test device 10.

[0045] like Figure 5 As shown, in one embodiment, the valve leakage test device 10 further includes a limiting assembly 700, and the limiting assembly 700 includes a limiting rod 710 and a limiting sleeve 720. The limiting sleeve 720 is fixedly connected to the first connecting plate 330, and the limiting rod 710 is threadedly connected to the limiting sleeve 720. In this embodiment, the limiting rod 710 and the limiting sleeve 720 are threadedly connected. When the first cylinder 210 drives each component to press down, the first connecting plate 330 drives the limiting assembly 700 to press down at the same time. When the valve 20 is pressed, the limiting rod 710 just hits the bottom of the frame 100. At this time, the first cylinder 210 stops operating, so that the limiting assembly 700 plays a limiting role.

[0046] like Figure 1 and Figure 5 As shown, in one embodiment, the second pressing rod 350 is provided with an elastic member 351, and the elastic member 351 is sleeved on the second pressing rod 350. In this embodiment, the elastic member 351 is a spring ring, and the spring ring is sleeved on the second pressing rod 350. The spring ring is continuously compressed during the process of the second pressing rod 350 being pressed down and reset upward, thereby reducing the rigid stress between the second pressing rod 350 and the second connecting plate 340, and between the second pressing rod 350 and the filling block 400, and playing a protective role.

[0047] like Figure 1 and Figure 5 As shown, in one embodiment, there are multiple second pressing rods 350, and the multiple second pressing rods 350 are disposed around the top of the filling block 400. In this embodiment, the multiple second pressing rods 350 are disposed around the top of the filling block 400. During the pressing process, the filling block 400 is pressed into the valve 20 by the multiple second pressing rods 350, thereby improving the pressing and sealing effect between the filling block 400 and the valve 20.

[0048] like Figure 3 As shown, in one embodiment, the valve leak test device 10 further includes a dotting assembly 800, which includes a connecting seat 810, a dotting rod 820 and a dotting cylinder 830. The connecting seat 810 is fixedly connected to the bottom of the frame 100, the dotting cylinder 830 is fixedly connected to the connecting seat 810, and the dotting rod 820 is connected to the dotting cylinder 830. In this embodiment, the dotting assembly 800 is used to mark a qualified valve 20. When the air tightness of the valve 20 reaches the preset requirement, the dotting cylinder 830 drives the dotting rod 820 to move so that the dotting rod 820 abuts against the valve 20. After the dotting mark is qualified, the second cylinder 220 is started to push out the valve 20.

[0049] The present application also provides a detection device for new energy automobile accessories, including the valve leak test device 10 in any of the above embodiments.

[0050] Compared with the prior art, the present invention has at least the following advantages:

[0051] 1. In the above-mentioned valve leakage test device 10, the valve 20 is located in the accommodating chamber 501, and the valve 20 is sealed and connected to the filling block 400 and the positioning block 500 respectively. The filling block 400 is used to fill the internal space of the valve 20, and the shape of the accommodating chamber 501 is adapted to the valve 20, so that the accommodating chamber 501 is adapted to the actual installation environment of the valve 20. The valve 20 is sealed and connected to the filling block 400, and the valve 20 is sealed and connected to the positioning block 500, so that the valve 20 is isolated from the outside air, and the hydraulic chamber 20a and the motor chamber 20b of the valve 20 are also sealed and isolated, so that the operator can detect the hydraulic chamber 20a and the motor chamber 20b of the valve 20 respectively. The valve leakage test device 10 performs air tightness detection of the valve 20 under the condition of fitting the assembly environment of the valve 20, so that the detection result matches the actual application scenario, and the accuracy of the leakage test is improved.

[0052] 2. The driving assembly 200 also includes a first cylinder 210 and a second cylinder 220. The first cylinder 210 is fixedly connected to the top of the frame 100, and the second cylinder 220 is fixedly connected to the bottom of the frame 100. When the valve 20 is placed in the accommodating chamber 501, the first cylinder 210 automatically presses the valve 20 to detect air tightness. When the detection is completed, the second cylinder 220 automatically pushes out the valve 20, which is convenient for the operator to take out the product. During the use of the device, the operator only needs to put and take out the product, which shortens the leak test time and improves the detection efficiency.

[0053] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the patent of the present disclosure shall be based on the attached claims.

Claims

1. A valve leak test device, used for air tightness detection of valves, the valve leak test device comprises a frame, a driving assembly, a pressing assembly, a filling block and a positioning block, the driving assembly comprises a first cylinder, the first cylinder is fixedly connected to the top of the frame, one end of the pressing assembly is connected to the first cylinder, the other end of the pressing assembly is connected to the filling block, the positioning block is arranged opposite to the filling block, the positioning block is provided with a containing cavity, and is characterized in that: The valve is located in the accommodating cavity, and the valve is sealed and connected to the filling block and the positioning block respectively; The driving assembly also includes a second cylinder, which is fixedly connected to the bottom of the frame.

2. The valve leakage testing device according to claim 1, characterized in that: The positioning block is provided with a first positioning pin, a second positioning pin and a sealing column, the first positioning pin is located at the top of the positioning block, and the second positioning pin and the sealing column are both located in the accommodating cavity.

3. The valve leak testing device according to claim 1, characterized in that: The valve leakage testing device also includes a sealing ring, which is used for sealing connection between the valve and the filling block, and is also used for sealing connection between the valve and the positioning block.

4. The valve leakage testing device according to claim 1, characterized in that: The pressing assembly includes a first pressing rod, a first pressing seat, a first connecting plate, a second connecting plate and a second pressing rod, the first pressing rod is connected to the first cylinder, the first pressing seat is fixedly connected to the first pressing rod, the first connecting plate is fixedly connected to the first pressing seat, and the two sides of the second connecting plate are respectively fixedly connected to the first connecting plate and the second pressing rod.

5. The valve leakage testing device according to claim 4, characterized in that: The valve leakage testing device also includes a guide assembly, which includes a first guide seat, a second guide seat and a guide column. The first guide seat is fixedly connected to the top of the frame, and the second guide seat is fixedly connected to the first connecting plate. A first through hole is opened on the top of the frame, a first guide hole is opened on the first guide seat, and a second guide hole is opened on the second guide seat. The guide column passes through the first through hole, the first guide hole and the second guide hole in sequence and is fixedly connected to the first connecting plate.

6. The valve leakage testing device according to claim 4, characterized in that: The valve leakage testing device further comprises a limit assembly, wherein the limit assembly comprises a limit rod and a limit sleeve, wherein the limit sleeve is fixedly connected to the first connecting plate, and the limit rod is threadedly connected to the limit sleeve.

7. The valve leakage testing device according to claim 4, characterized in that: The second pressing rod is provided with an elastic member, and the elastic member is sleeved on the second pressing rod.

8. The valve leakage testing device according to claim 7, characterized in that: There are a plurality of second pressing rods, and the plurality of second pressing rods are disposed around the top of the filling block.

9. The valve leakage testing device according to claim 1, characterized in that: The valve leak testing device also includes a striking assembly, which includes a connecting seat, a striking rod and a striking cylinder. The connecting seat is fixedly connected to the bottom of the frame, the striking cylinder is fixedly connected to the connecting seat, and the striking rod is connected to the striking cylinder.

10. A detection device for new energy vehicle accessories, characterized in that: A valve leak testing device comprising any one of claims 1-9.

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