Air tightness detection device

Abstract

The utility model provides an air tightness detection device, which relates to the technical field of detection equipment and comprises an air supply mechanism, an air guide column, a detector and a support body. The air supply mechanism and the detector are respectively fixed on the supporting main body, the air guide column is detachably connected with the supporting main body, and the detector is used for detecting the air pressure in the air guide column and the air supply mechanism; the product is arranged on the air guide column in a sleeving mode, two sealing pieces are arranged in the product, an air outlet of the air guide column is formed between the two sealing pieces, air pressure is provided for the interior of the air guide column through the air supply mechanism, then the air pressure in the air guide column is detected through the detector, the sealing performance of the product and the sealing pieces is judged according to changes of the air pressure, and the sealing performance of the product and the sealing pieces is judged through the detachable air guide column. And the air guide columns with different sizes and shapes can be applied to different products, so that the detection range is wider. The technical problem that in the prior art, a test instrument is small in application range is solved, and the technical effects of being wide in detection range and high in applicability are achieved.

Description

Technical Field

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

[0002] Currently, airtightness testing plays a crucial role in process applications across various industries, with water testing and pressure decay methods being the most prevalent methods. In the new energy vehicle industry, air source tightness testing is applied throughout all stages of vehicle design, manufacturing, inspection, and maintenance.

[0003] Traditional airtightness testing requires an airtightness leak detector as a foundation, an air source pipeline, a suitable sealing plug, and testing fixtures. The product component's through-hole end is sealed, and air is injected into the product cavity for testing, or the product is injected and then immersed in water for sealing testing. The above operation is the testing mode implemented by most companies. However, a single plug can only be used to test a single product, resulting in a limited range of applicability for the testing instrument. Utility Model Content

[0004] The purpose of this invention is to provide an airtightness testing device to alleviate the technical problem of the limited applicability of existing testing instruments.

[0005] This utility model provides an airtightness testing device, comprising: an air supply mechanism, an air guide column, a detector, and a support body;

[0006] The gas supply mechanism and the detector are respectively fixed on the support body. The gas guide column is detachably connected to the support body. The gas supply mechanism is connected to the gas guide column and the detector. The detector is used to detect the gas pressure in the gas guide column and the gas supply mechanism.

[0007] The product is fitted onto the air guide column, and two sealing elements are provided inside the product. The product is sealed to the air guide column through the two sealing elements, and the air outlet of the air guide column is located between the two sealing elements.

[0008] In an optional embodiment, an air guiding channel is provided inside the air guiding column, the air guiding channel extends along the length direction of the air guiding column, the air outlet is provided on the side of the air guiding column, and the air guiding channel communicates with the air outlet.

[0009] In an optional embodiment, the support body includes a support plate and a support frame;

[0010] The support plate is detachably connected to the support frame. The support plate has holes, and the air guide column passes through the holes. The product abuts against the support plate.

[0011] In an optional embodiment, the support frame is provided with a plurality of casters on the side closest to the ground, and the plurality of casters are respectively connected to the support frame.

[0012] In an optional embodiment, the gas supply mechanism includes a gas distribution valve, a solenoid valve, and a gas source;

[0013] The gas source is connected to the gas distribution valve. Multiple solenoid valves are provided, and each solenoid valve is connected to the gas distribution valve. Each solenoid valve is connected to a detector and the gas guide column.

[0014] In an optional implementation, a gas source pressure gauge is also included;

[0015] The gas source pressure gauge is disposed between the gas source and the gas distribution valve. The gas source pressure gauge is fixedly connected to the support frame. The gas source pressure gauge is used to detect the pressure output by the gas source.

[0016] In an optional implementation, a controller and an alarm are also included;

[0017] The controller is electrically connected to the gas source pressure gauge, the gas distribution valve, the solenoid valve, and the alarm, respectively, and is used to control the opening and closing of the gas distribution valve, the solenoid valve, and the alarm.

[0018] In an optional implementation, a sensor is also included;

[0019] The sensor is positioned opposite to the product, connected to the support plate, and electrically connected to the controller.

[0020] In an optional implementation, a dotting device is also included;

[0021] The dotting device is located on the side of the product away from the sensor. The dotting device is positioned opposite to the product. The dotting device is electrically connected to the controller and connected to the support frame. The dotting device is used to dot the product.

[0022] In an optional embodiment, a grating is also included, which is disposed on both sides of the product and connected to the support body.

[0023] This utility model provides an airtightness testing device, comprising: an air supply mechanism, an air guide column, a detector, and a support body; the air supply mechanism and the detector are respectively fixed on the support body, the air guide column is detachably connected to the support body, the air supply mechanism is connected to both the air guide column and the detector, and the detector is used to detect the air pressure within the air guide column and the air supply mechanism; a product is fitted onto the air guide column, and two sealing elements are provided inside the product, which is sealed to the air guide column through the two sealing elements. The air outlet of the air guide column is located between the two sealing elements. Air pressure is supplied to the air guide column through the air supply mechanism, and then the air pressure within the air guide column is detected by the detector. The airtightness of the product and the sealing elements is determined by the change in air pressure. Because the air guide column is detachable, different sizes and shapes of air guide columns can be used for different products, thus broadening the testing range. This alleviates the technical problem of limited applicability of existing testing instruments, achieving a wider testing range and stronger applicability. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific 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 from these drawings without creative effort.

[0025] Figure 1 A schematic diagram of the airtightness testing device provided in the embodiment of this utility model;

[0026] Figure 2 A top view of the airtightness testing device provided in an embodiment of this utility model;

[0027] Figure 3 A front view of the airtightness detection device provided in an embodiment of this utility model;

[0028] Figure 4 Left view of the airtightness testing device provided in an embodiment of this utility model;

[0029] Figure 5 A schematic diagram of the product, support plate, and sensor provided in an embodiment of this utility model;

[0030] Figure 6 for Figure 5 A sectional view.

[0031] Icons: 100-Air supply unit; 101-Air distribution valve; 102-Solenoid valve; 103-Air source pressure gauge; 200-Air guide column; 201-Air outlet; 202-Air guide channel; 300-Detector; 400-Support body; 401-Support plate; 402-Support frame; 403-Wheel caster; 500-Product; 600-Seal; 700-Sensor; 800-Marker; 900-Raster. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0036] In related technologies, traditional airtightness testing requires an airtightness leak detector as a foundation, connection of an air source pipeline, and the use of appropriate sealing plugs and testing fixtures. The product 500 component's through-hole end is sealed, and air is injected into the product 500 cavity for testing, or the product 500 is injected and then immersed in water for sealing testing. The above operations are the testing mode implemented by most companies. However, a single plug can only test a single product 500, resulting in a limited scope of application for the testing instrument.

[0037] In view of this, such as Figures 1-6 As shown in some embodiments of this utility model, an airtightness testing device includes: an air supply mechanism 100, an air guide column 200, a detector 300, and a support body 400; the air supply mechanism 100 and the detector 300 are respectively fixed on the support body 400, the air guide column 200 is detachably connected to the support body 400, the air supply mechanism 100 is connected to the air guide column 200 and the detector 300 respectively, and the detector 300 is used to detect the air pressure inside the air guide column 200 and the air supply mechanism 100; a product 500 is sleeved on the air guide column 200, and two sealing elements 600 are provided inside the product 500. The product 500 is sealed to the air guide column 200 through the two sealing elements 600, and the air outlet 201 of the air guide column 200 is located between the two sealing elements 600.

[0038] In the above embodiment, the gas supply unit 100 is fixedly connected to the support body 400. The gas supply unit 100 supplies gas to the gas guide column 200 through the detector 300. The detector 300 can be a pressure detector 300, which is used to detect the air pressure between the gas supply unit 100 and the gas guide column 200 in real time. The gas guide column 200 can be cylindrical and can be inserted into the support body 400. The gas guide column 200 can be detachably connected to the support body 400 and can also be detachably connected to the gas supply unit 100, so that the gas guide column 200 can be replaced more easily. Furthermore, the diameter direction of the gas guide column 200 can be aligned with... The supporting body 400 has a consistent length direction, and each product 500 has a receiving cavity. The cross-section of the receiving cavity can be circular, and the sealing element 600 can be a sealing ring. The two sealing elements 600 can be arranged in parallel, and the air outlet 201 of the air guide column 200 can be set between the two sealing elements 600. Thus, the air guide column 200 can be sealed to the product 500 through the two sealing elements 600, thereby forming a sealed space with the two sealing elements 600, the air guide column 200, and the product 500. Air can be injected into the space through the air outlet 201, and the air pressure change in the air guide column 200 can be used to check the sealing performance of the two sealing elements 600 in the product 500.

[0039] Some embodiments of this utility model provide an airtightness testing device, including: an air supply mechanism 100, an air guide column 200, a detector 300, and a support body 400; the air supply mechanism 100 and the detector 300 are respectively fixed on the support body 400, the air guide column 200 is detachably connected to the support body 400, the air supply mechanism 100 is connected to the air guide column 200 and the detector 300, and the detector 300 is used to detect the air pressure inside the air guide column 200 and the air supply mechanism 100; a product 500 is sleeved on the air guide column 200, and a [missing information - likely a device name or component] is provided inside the product 500. Two sealing elements 600 are used to seal the product 500 to the air guide column 200. The air outlet 201 of the air guide column 200 is located between the two sealing elements 600. An air supply unit 100 provides air pressure to the air guide column 200, and a detector 300 detects the air pressure within the air guide column 200. Changes in air pressure are used to determine the sealing performance between the product 500 and the sealing elements 600. The detachable air guide column 200 allows for the use of different sizes and shapes of air guide columns 200 for different products 500, thus broadening the testing range. This alleviates the technical problem of limited applicability of existing testing instruments, achieving a wider testing range and stronger applicability.

[0040] In an optional embodiment, an air guide channel 202 is provided inside the air guide column 200. The air guide channel 202 extends along the length direction of the air guide column 200, and the air outlet 201 is provided on the side of the air guide column 200. The air guide channel 202 is connected to the air outlet 201.

[0041] In the above embodiments, the air guide channel 202 can be cylindrical, and can be located at the axial position inside the air guide column 200. The air guide channel 202 can extend along the axial direction of the air guide column 200. The air guide channel 202 can communicate with the outside through the end face of the air guide column 200. The air supply mechanism 100 can be sleeved on the air guide column 200 through the air supply pipe so that the air supply mechanism 100 can supply air to the air guide channel 202 through the air supply pipe. Furthermore, the air outlet 201 is located on the side of the air guide column 200. The cross-section of the air outlet 201 can also be circular. The air outlet 201 can be set perpendicular to the air guide channel 202, and the air outlet 201 is connected to the air guide channel 202.

[0042] In an optional embodiment, the support body 400 includes a support plate 401 and a support frame 402; the support plate 401 and the support frame 402 are detachably connected, the support plate 401 is provided with holes, the air guide column 200 passes through the holes, and the product 500 abuts against the support plate 401.

[0043] In the above embodiment, the support plate 401 is rectangular, and both the support frame 402 and the support plate 401 can be made of metal. The support plate 401 and the support frame 402 are detachably connected. A circular hole can be provided at the center of the support plate 401, and the air guide column 200 can be inserted into the hole. A step can be provided on the air guide column 200, and the air guide column 200 can abut against the support plate 401 through the step. The part of the air guide column 200 extending from the support plate 401 can be connected to the product 500. After the product 500 is fitted onto the air guide column 200, the product 500 extends into and abuts against the surface of the support plate 401 to fix the product 500. At this time, the air outlet 201 on the air guide column 200 is located between the two sealing elements 600.

[0044] In an optional embodiment, a plurality of casters 403 are provided on the side of the support frame 402 closest to the ground, and the plurality of casters 403 are respectively connected to the support frame 402.

[0045] In the above embodiment, the side of the support frame 402 closest to the ground can be rectangular, and four casters 403 can be provided. The four casters 403 can be arranged along the four corners of the support frame 402. The support frame 402 can be connected to the ground through the four casters 403, so that the support frame 402 can slide relative to the ground through the four casters 403, making the support frame 402 slide more smoothly.

[0046] In an optional embodiment, the gas supply unit 100 includes a gas distribution valve 101, a solenoid valve 102, and a gas source; the gas source is connected to the gas distribution valve, and multiple solenoid valves 102 are provided, each of which is connected to the gas distribution valve 101, and each solenoid valve 102 is connected to a detector 300 and a guide column 200.

[0047] In the above embodiment, one of the gas distribution valves 101 can be connected to a gas source, and the other can be connected to a solenoid valve 102. The number of solenoid valves 102 can be the same as the number of air guide columns 200. Each solenoid valve 102 can be connected to an air guide column 200 so that the gas source can be divided into several solenoid valves 102 through the gas distribution valve 101, and then further divided into an air guide column 200 through each solenoid valve 102. The solenoid valve 102 can cut off the connection between the gas distribution valve 101 and the air guide column 200. Furthermore, a detector 300 is provided between each solenoid valve 102 and the air guide column 200. The detector 300 is used to detect the pressure of the gas in the air guide column 200 and the gas outlet 201.

[0048] In an optional embodiment, a gas source pressure gauge 103 is also included; the gas source pressure gauge 103 is disposed between the gas source and the gas distribution valve 101, and the gas source pressure gauge 103 is fixedly connected to the support frame 402. The gas source pressure gauge 103 is used to detect the pressure output by the gas source.

[0049] In the above embodiment, the gas source pressure gauge 103 can be connected to the gas source and the gas distribution valve 101 through the gas pipe. The gas source pressure gauge 103 can be fixed to the support frame 402 with bolts. The gas source pressure gauge 103 is used to detect the pressure output by the gas source, thereby determining the pressure of the gas source and avoiding excessive pressure of the gas source.

[0050] In an optional embodiment, a controller and an alarm are also included; the controller is electrically connected to the gas source pressure gauge 103, the gas distribution valve 101, the solenoid valve 102 and the alarm respectively, and the controller is used to control the opening and closing of the gas distribution valve 101, the solenoid valve 102 and the alarm.

[0051] In the above embodiments, the controller may include a PLC or a computer. The controller can be fixed on the support frame 402 and connected to the support frame 402 by bolts. The controller can be connected to the gas source pressure gauge 103, the gas distribution valve 101, the solenoid valve 102, and the alarm electrical signals respectively. The controller can also be connected to the detector 300 electrical signals. The gas source pressure gauge 103 can transmit the detected gas source pressure to the controller. The controller can control the opening of the gas distribution valve 101 and the opening and closing of each channel in the outlet of the gas distribution valve 101. The controller can also control the opening and closing of the solenoid valve 102. The controller can control whether to supply gas to the air column 200 by controlling the solenoid valve 102. The gas pressure detected by each detector 300 can be transmitted to the controller. The controller controls whether the alarm will sound based on the value detected by the detector 300. If the value detected by the detector 300 changes within the threshold range, the alarm will not sound. If the value detected by the detector 300 changes outside the threshold range, the detector 300 can control the alarm to sound. The alarm can be a buzzer alarm or a flashing alarm.

[0052] In an optional embodiment, a sensor 700 is also included; the sensor 700 is disposed opposite to the product 500, the sensor 700 is connected to the support plate 401, and the sensor 700 is electrically connected to the controller.

[0053] In the above embodiment, the sensor 700 can be fixed on the support plate 401. The detection end of the sensor 700 can face the air guide column 200. The sensor 700 can be fixed on the support plate 401 by bolts. The sensor 700 can be a distance sensor. After the product 500 is sleeved on the air guide column 200 and abuts against the support plate 401, the sensor 700 can detect the change in distance, thereby determining that the product 500 is sleeved on the air guide column 200. Then, the sensor 700 can transmit the installation information of the product 500 to the controller through an electrical signal.

[0054] In an optional embodiment, a dotting device 800 is also included; the dotting device 800 is disposed on the side of the product 500 away from the sensor 700, the dotting device 800 is disposed opposite to the product 500, the dotting device 800 is electrically connected to the controller, the dotting device 800 is connected to the support frame 402, and the dotting device 800 is used to dot the product 500.

[0055] In the above embodiments, the dotting device 800 can be a laser dotting device 800 or a needle dotting device 800. The dotting device 800 can be set on one side of the product 500 away from the sensor 700. The dotting device 800 can be fixed on the support frame 402. The dotting device 800 can be connected to the controller, and the controller can control the dotting device 800 to dot the product 500.

[0056] In an optional embodiment, a grating 900 is also included, which is disposed on both sides of the product 500 and connected to the support body 400.

[0057] In the above embodiment, two gratings 900 can be provided. The two gratings 900 are parallel to each other and arranged opposite to each other. The two gratings 900 are respectively connected to the support frame 402. The two gratings 900 are arranged on the side of the air guide column 200 away from the air distribution valve 101. The two gratings 900 are also respectively connected to the controller for electrical signal. The two gratings 900 can be used to detect whether foreign objects are inserted. When the grating 900 detects that a foreign object has passed through, it can transmit a signal to the controller and control the solenoid valve 102 to close, so as to prevent the air source from continuously filling the air guide column 200 with air.

[0058] 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, include: The gas supply mechanism (100), the air guide column (200), the detector (300), and the support body (400) are included. The gas supply mechanism (100) and the detector (300) are respectively fixed on the support body (400). The air guide column (200) is detachably connected to the support body (400). The gas supply mechanism (100) is connected to the air guide column (200) and the detector (300) respectively. The detector (300) is used to detect the air pressure in the air guide column (200) and the gas supply mechanism (100). The product (500) is fitted onto the air guide column (200). Two sealing elements (600) are provided inside the product (500). The product (500) is sealed to the air guide column (200) through the two sealing elements (600). The air outlet (201) of the air guide column (200) is located between the two sealing elements (600).

2. The airtightness testing device according to claim 1, characterized in that, An air guide channel (202) is provided inside the air guide column (200), the air guide channel (202) extends along the length direction of the air guide column (200), the air outlet (201) is provided on the side of the air guide column (200), and the air guide channel (202) is connected to the air outlet (201).

3. The airtightness testing device according to claim 1, characterized in that, The supporting body (400) includes a supporting plate (401) and a supporting frame (402); The support plate (401) is detachably connected to the support frame (402). The support plate (401) has holes, and the air guide column (200) passes through the holes. The product (500) abuts against the support plate (401).

4. The airtightness testing device according to claim 3, characterized in that, The support frame (402) is provided with a plurality of casters (403) on the side near the ground, and the plurality of casters (403) are respectively connected to the support frame (402).

5. The airtightness testing device according to claim 3, characterized in that, The gas supply unit (100) includes a gas distribution valve (101), a solenoid valve (102), and a gas source; The gas source is connected to the gas distribution valve. Multiple solenoid valves (102) are provided. Each solenoid valve (102) is connected to the gas distribution valve (101). Each solenoid valve (102) is connected to a detector (300) and a gas guide column (200).

6. The airtightness testing device according to claim 5, characterized in that, It also includes a gas source pressure gauge (103); The gas source pressure gauge (103) is disposed between the gas source and the gas distribution valve (101). The gas source pressure gauge (103) is fixedly connected to the support frame (402). The gas source pressure gauge (103) is used to detect the pressure output by the gas source.

7. The airtightness testing device according to claim 6, characterized in that, It also includes controllers and alarms; The controller is electrically connected to the gas source pressure gauge (103), the gas distribution valve (101), the solenoid valve (102), and the alarm, respectively. The controller is used to control the opening and closing of the gas distribution valve (101), the solenoid valve (102), and the alarm.

8. The airtightness testing device according to claim 7, characterized in that, It also includes a sensor (700); The sensor (700) is disposed opposite to the product (500), the sensor (700) is connected to the support plate (401), and the sensor (700) is electrically connected to the controller.

9. The airtightness testing device according to claim 8, characterized in that, It also includes a dot generator (800); The dotting device (800) is disposed on the side of the product (500) away from the sensor (700). The dotting device (800) is disposed opposite to the product (500). The dotting device (800) is electrically connected to the controller and connected to the support frame (402). The dotting device (800) is used to dot the product (500).

10. The airtightness testing device according to any one of claims 1-9, characterized in that, It also includes a grating (900) disposed on both sides of the product (500) and connected to the support body (400).

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