A wire harness sheath airtightness testing device

Abstract

This utility model discloses a wire harness sheath airtightness testing device, comprising: a testing box, a box cover on the top of the testing box, an air pump fixedly connected to one end of the top of the box cover, a fixed structure at one end of the air pump, a driving mechanism on one side of the testing box, a gas sensor fixedly connected to the inner side wall of the testing box, a pressure sensor fixedly connected to the other inner side wall of the testing box, a detector fixedly connected to one end of the outer side of the testing box, a vacuum pump fixedly connected to the back of the testing box, and an extraction pipe fixedly connected to the vacuum pump's extraction port. During installation, the wire harness sheath is simply placed on the connecting pipe. After inflation, the gas pressure expands the sealing ring, automatically pressing the sheath into the groove to form a tight seal, eliminating the need for manual stretching. When helium is filled, the sheath naturally straightens, ensuring uniform gas distribution and avoiding testing errors caused by traditional stretching. The system is equipped with an electric push rod for one-button opening and closing of the box cover, and features a detachable bolt design for easy maintenance.

Description

Technical Field

[0001] This utility model relates to the technical field of wire harness sheath airtightness testing equipment, specifically a wire harness sheath airtightness testing device. Background Technology

[0002] Wire harness sheaths are protective components that enclose wire harnesses. They are commonly used in automobiles, electronic equipment, and other fields, serving functions such as insulation, abrasion protection, and waterproofing and dustproofing. Air tightness testing devices are used to test the sealing performance of wire harness sheaths, ensuring that the sheaths maintain good sealing performance in various environments, preventing the intrusion of moisture, dust, gases, and other substances, thereby ensuring the safe and stable operation of the wire harness system.

[0003] For example, a Chinese patent document discloses an airtightness testing device for automotive wiring harness sheaths (publication number: CN221959698U). This patent uses an electric telescopic rod to pull up and lower the top plate, inserting the wiring harness sheath into the testing chamber for testing. An air pump is used to inflate the wiring harness sheath through an air supply pipe to test its airtightness. The air bubbles inside the testing chamber are observed through an observation window to determine the airtightness test result. When the device is not in use, the water in the testing chamber is drained through a drain outlet to prevent water from deteriorating and contaminating the test.

[0004] However, the water immersion method relies on manual visual inspection of bubbles, which may be overlooked due to bubbles being too small or rising slowly, leading to the risk of missed detection. Utility Model Content

[0005] The purpose of this utility model is to provide a wire harness sheath airtightness detection device in order to solve the above problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a wire harness sheath airtightness testing device, comprising: a testing box, the top of which is provided with a box cover, an air pump fixedly connected to one end of the top of the box cover, a fixed structure at one end of the air pump, a driving mechanism on one side of the testing box, a gas sensor fixedly connected to the inner side wall of the testing box, a pressure sensor fixedly connected to the other inner side wall of the testing box, a detector fixedly connected to one end of the outer side of the testing box, a vacuum pump fixedly connected to the back of the testing box, and an air extraction pipe fixedly connected to the air extraction port of the vacuum pump.

[0007] As a further embodiment of this utility model: the fixing structure includes an air inlet pipe, a connecting pipe, and a groove. The air inlet pipe is fixedly connected to the air outlet of the air pump, and the other end of the air inlet pipe extends through the cover into the testing chamber. The connecting pipe is fixedly connected to the end of the air inlet pipe that extends into the testing chamber. The groove is formed on the outside of the connecting pipe. A wire harness sheath and a pneumatic expansion sealing ring are also included. The wire harness sheath is fitted onto the outside of the connecting pipe, and the pneumatic expansion sealing ring is positioned on the outer side above the wire harness sheath.

[0008] As a further embodiment of this utility model: the driving mechanism includes an electric push rod, a limiting top rod, and a limiting sleeve. The electric push rod is fixedly connected to the lower end of one side of the detection box, the limiting top rod is fixedly connected to the movable end of the electric push rod, and the limiting sleeve is fixedly connected to the upper end of one side of the detection box. The limiting top rod and the limiting sleeve are slidably connected. A connecting block and a bolt are also included. The connecting block is fixedly connected to one side of the box cover, and the bolt is located above the connecting block. The other end of the bolt passes through the connecting block and is threadedly connected to the limiting top rod.

[0009] As a further improvement of this utility model: a square sealing gasket is fixedly connected to the top of the testing box, a square sealing groove is provided under the box cover, the square sealing gasket is adapted to the square sealing groove, and an acrylic transparent plate is embedded on the front of the testing box.

[0010] As a further embodiment of this utility model: a base plate is fixedly connected to the bottom of the detection box, a universal brake wheel is fixedly connected to the bottom of the base plate, and a push rod handle is fixedly connected to the upper edge of the base plate.

[0011] As a further improvement of this utility model: both the gas sensor and the pressure sensor are connected to the detector wires, and the other end of the suction pipe passes through and extends into the detection box.

[0012] As a further improvement of this utility model: the number of driving mechanisms is provided in two sets, with the other set of driving mechanisms located on the other side of the detection box.

[0013] As a further embodiment of this utility model: the connecting pipe, the groove and the pneumatic expansion sealing ring are each provided in two sets, with the other set of the connecting pipe sleeved on the inner side below the wire harness sheath and the other set of the pneumatic expansion sealing rings provided on the outer side below the wire harness sheath.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] During installation, this invention simply requires placing the wire harness sheath onto the connecting pipe. After inflation, the gas pressure expands, and the sealing ring automatically presses the sheath into the groove to form a tight seal, eliminating the need for manual stretching. When helium is filled, the sheath naturally straightens, ensuring uniform gas distribution and avoiding detection errors caused by traditional stretching. The system is equipped with an electric push rod for one-button opening and closing of the cover, and features a detachable bolt design for easy maintenance. During testing, a vacuum is first drawn before helium is filled. High-precision sensors automatically monitor the gas pressure and concentration, displaying the data in real time. Compared to the traditional water immersion method, it can accurately identify minute leaks, completely avoiding the risk of missed detections by manual visual inspection. The entire system is highly automated, with reliable detection accuracy, significantly improving the efficiency and accuracy of seal testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the detection box in this utility model;

[0018] Figure 3 This is a schematic diagram of the vacuum pump in this utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the box cover of this utility model;

[0020] Figure 5 This is a schematic diagram of the fixing structure in this utility model;

[0021] Figure 6 This is a schematic diagram of the drive mechanism in this utility model.

[0022] In the diagram: 1. Testing box; 2. Box cover; 3. Air pump; 4. Fixing structure; 41. Air inlet pipe; 42. Connecting pipe; 43. Groove; 44. Wiring harness sheath; 45. Air pressure expansion sealing ring; 5. Drive mechanism; 51. Electric push rod; 52. Limiting rod; 53. Limiting sleeve; 54. Connecting block; 55. Bolt; 6. Gas sensor; 7. Pressure sensor; 8. Detector; 9. Vacuum pump; 10. Evacuation pipe; 11. Square sealing gasket; 12. Square sealing groove; 13. Acrylic transparent panel; 14. Base plate; 15. Universal brake wheel; 16. Push rod handle. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] 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. They 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. Therefore, they should not be construed as limitations on 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. In the description of this utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" 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 based on the specific circumstances. The embodiments of this utility model will be described below based on its overall structure.

[0025] Reference Figures 1 to 6 In this embodiment of the utility model, a wire harness sheath airtightness detection device includes: a detection box 1, a main container for forming a sealed detection environment, a box cover 2 on the top of the detection box 1 for opening and closing and sealing, and an air pump 3 fixedly connected to one end of the top of the box cover 2 for filling helium gas for leakage detection.

[0026] One end of the air pump 3 is equipped with a fixed structure 4, and one side of the detection box 1 is equipped with a drive mechanism 5. A gas sensor 6 is fixedly connected to the inner side wall of the detection box 1, and a pressure sensor 7 is fixedly connected to the other inner side wall of the detection box 1. A detector 8 is fixedly connected to one end of the outside of the detection box 1. The pressure sensor 7 and the gas sensor 6 detect the changes in air pressure and the concentration of leaked gas inside the box, and transmit the real-time data to the detector 8 to display the detection results.

[0027] A vacuum pump 9 is fixedly connected to the back of the test chamber 1. A suction pipe 10 is fixedly connected to the suction port of the vacuum pump 9. The vacuum pump 9 extracts the air from the test chamber 1 through the suction pipe 10 to form a vacuum environment. The gas sensor 6 and the pressure sensor 7 are both wired to the detector 8. The other end of the suction pipe 10 passes through and extends into the interior of the test chamber 1. There are two sets of drive mechanisms 5. The other set of drive mechanisms 5 is located on the other side of the test chamber 1.

[0028] Reference Figure 1 , Figure 4 and Figure 5The fixed structure 4 includes an air inlet pipe 41, a connecting pipe 42, and a groove 43. The air inlet pipe 41 is fixedly connected to the air outlet of the air pump 3, and the other end of the air inlet pipe 41 extends through the box cover 2 into the test box 1. The connecting pipe 42 is fixedly connected to one end of the air inlet pipe 41 that extends into the test box 1. The groove 43 is opened on the outside of the connecting pipe 42.

[0029] The wire harness sheath 44 and the pneumatic expansion sealing ring 45 are provided. The wire harness sheath 44 is sleeved on the outside of the connecting pipe 42, and the pneumatic expansion sealing ring 45 is located on the outer side above the wire harness sheath 44.

[0030] Two sets of connecting tubes 42, grooves 43, and pneumatic expansion sealing rings 45 are provided. One set of connecting tubes 42 is fitted onto the inner side below the wire harness sheath 44, and the other set of pneumatic expansion sealing rings 45 is positioned on the outer side below the wire harness sheath 44. One end of the wire harness sheath 44 is fitted over one set of connecting tubes 42, and the other end of the wire harness sheath 44 is fitted over the other set of connecting tubes 42. Then, the two sets of pneumatic expansion sealing rings 45 are fitted over the wire harness sheath 44, respectively, and are aligned with the grooves 43 on the two sets of connecting tubes 42. Corresponding to 3, after the gas pressure expansion sealing ring 45 is inflated, its expanded inner ring will generate inward pressure, causing the wire harness sheath 44 to be embedded into the groove 43, forming a tight locking and sealing structure. This sealing method does not require additional stretching of the wire harness sheath 44. When the air pump 3 fills the wire harness sheath 44 with helium through the air inlet pipe 41, the wire harness sheath 44 will naturally be straightened as the internal air pressure increases, ensuring uniform gas distribution during the detection process and avoiding detection errors caused by stretching deformation.

[0031] Reference Figure 1 , Figure 2 and Figure 6 The drive mechanism 5 includes an electric push rod 51, a limiting top rod 52, and a limiting sleeve 53. The electric push rod 51 is fixedly connected to the lower end of one side of the detection box 1. The limiting top rod 52 is fixedly connected to the movable end of the electric push rod 51. The limiting sleeve 53 is fixedly connected to the upper end of one side of the detection box 1. The limiting top rod 52 and the limiting sleeve 53 are slidably connected.

[0032] The connecting block 54 and bolt 55 are fixedly connected to one side of the box cover 2. The bolt 55 is located above the connecting block 54. The other end of the bolt 55 passes through the connecting block 54 and is threadedly connected to the limiting rod 52. The limiting rod 52 is driven by the electric push rod 51 to move downward stably under the limitation of the limiting sleeve 53. Then, the box cover 2 is moved downward by the connecting block 54. Then, the box cover 2 and the detection box 1 are tightly fitted by the square sealing washer 11 and the square sealing groove 12. This method facilitates the opening and closing of the entire device. The design of the bolt 55 makes it easy to release the fixed state between the box cover 2 and the limiting rod 52, so as to disassemble it.

[0033] Reference Figures 1 to 3 A square sealing gasket 11 is fixedly connected to the top of the test box 1, and a square sealing groove 12 is provided under the box cover 2. The square sealing gasket 11 and the square sealing groove 12 are adapted to each other. Through the square sealing gasket 11 and the square sealing groove 12, the box cover 2 and the test box 1 are tightly fitted. An acrylic transparent plate 13 is embedded on the front of the test box 1 to facilitate the penetration of the test conditions.

[0034] The bottom of the test box 1 is fixedly connected to a base plate 14 to support the entire device. The bottom of the base plate 14 is fixedly connected to a universal brake wheel 15 for easy movement and fixation of the device. The upper edge of the base plate 14 is fixedly connected to a push rod handle 16 for easy pushing of the device.

[0035] The working principle of this utility model is as follows:

[0036] In use, one end of the wire harness sheath 44 is fitted over one set of connecting tubes 42, and the other end of the wire harness sheath 44 is fitted over another set of connecting tubes 42. Then, two sets of pneumatic expansion sealing rings 45 are fitted over the wire harness sheath 44, corresponding to the grooves 43 on the two sets of connecting tubes 42 respectively. After the pneumatic expansion sealing rings 45 are inflated, their expanded inner rings will generate inward pressure, causing the wire harness sheath 44 to be embedded in the grooves 43, forming a tight locking and sealing structure. This sealing method does not require additional stretching of the wire harness sheath 44. When the air pump 3 fills the wire harness sheath 44 with helium through the air inlet pipe 41, the wire harness sheath 44 will naturally be straightened as the internal air pressure increases, ensuring uniform gas distribution during the detection process and avoiding detection errors caused by stretching deformation.

[0037] Subsequently, the electric push rod 51 drives the limiting rod 52 to move downward steadily under the limit of the limiting sleeve 53. Then, the connecting block 54 drives the box cover 2 to move downward. Then, the square sealing gasket 11 and the square sealing groove 12 achieve a tight fit between the box cover 2 and the detection box 1. This method facilitates the opening and closing of the entire device. Furthermore, the design of the bolt 55 makes it easy to release the fixed state between the box cover 2 and the limiting rod 52, thereby enabling disassembly.

[0038] Finally, vacuum pump 9 extracts air from the detection chamber 1 through suction pipe 10 to create a vacuum environment. Then, air pump 3 fills the wire harness sheath 44 with helium through air inlet pipe 41. Pressure sensor 7 and gas sensor 6 detect changes in air pressure and concentration of leaked gas in the chamber and transmit the real-time data to detector 8 to display the detection results. This avoids the risk of missed detection caused by relying on manual visual inspection of bubbles, which may be overlooked due to small bubbles or slow rising speed.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A harness jacket air tightness testing device characterized by, include: The test box (1) has a cover (2) on top. An air pump (3) is fixedly connected to one end of the top of the cover (2). A fixed structure (4) is provided at one end of the air pump (3). A drive mechanism (5) is provided on one side of the test box (1). A gas sensor (6) is fixedly connected to the inner side wall of the test box (1). A pressure sensor (7) is fixedly connected to the other inner side wall of the test box (1). A detector (8) is fixedly connected to one end of the outside of the test box (1). A vacuum pump (9) is fixedly connected to the back of the test box (1). A suction pipe (10) is fixedly connected to the suction port of the vacuum pump (9).

2. The wire harness sheath airtightness testing device according to claim 1, characterized in that, The fixing structure (4) includes: An air inlet pipe (41), a connecting pipe (42), and a groove (43) are provided. The air inlet pipe (41) is fixedly connected to the air outlet of the air pump (3), and the other end of the air inlet pipe (41) extends through the cover (2) into the test box (1). The connecting pipe (42) is fixedly connected to one end of the air inlet pipe (41) that extends into the test box (1). The groove (43) is provided on the outside of the connecting pipe (42). The wire harness sheath (44) and the pneumatic expansion sealing ring (45) are provided. The wire harness sheath (44) is sleeved on the outside of the connecting pipe (42), and the pneumatic expansion sealing ring (45) is located on the outside of the wire harness sheath (44).

3. The wire harness sheath airtightness testing device according to claim 1, characterized in that, The drive mechanism (5) includes: An electric push rod (51), a limiting top rod (52), and a limiting sleeve (53) are provided. The electric push rod (51) is fixedly connected to the lower end of one side of the detection box (1). The limiting top rod (52) is fixedly connected to the movable end of the electric push rod (51). The limiting sleeve (53) is fixedly connected to the upper end of one side of the detection box (1). The limiting top rod (52) and the limiting sleeve (53) are slidably connected. The connecting block (54) and the bolt (55) are fixedly connected to one side of the box cover (2), and the bolt (55) is located above the connecting block (54). The other end of the bolt (55) passes through the connecting block (54) and is threadedly connected to the limiting top rod (52).

4. The wire harness sheath airtightness testing device according to claim 1, characterized in that, A square sealing gasket (11) is fixedly connected to the top of the test box (1), and a square sealing groove (12) is provided below the box cover (2). The square sealing gasket (11) is adapted to the square sealing groove (12), and an acrylic transparent plate (13) is embedded on the front of the test box (1).

5. The wire harness sheath airtightness testing device according to claim 1, characterized in that, The bottom of the test box (1) is fixedly connected to a base plate (14), the bottom of the base plate (14) is fixedly connected to a universal brake wheel (15), and the upper edge of the base plate (14) is fixedly connected to a push rod handle (16).

6. The wire harness sheath airtightness testing device according to claim 1, characterized in that, The gas sensor (6) and the pressure sensor (7) are both wired to the detector (8), and the other end of the suction pipe (10) extends through and into the detection box (1).

7. The wire harness sheath airtightness testing device according to claim 1, characterized in that, The number of drive mechanisms (5) is provided in two sets, with the other set of drive mechanisms (5) located on the other side of the detection box (1).

8. The wire harness sheath airtightness testing device according to claim 2, characterized in that, The connecting tube (42), the groove (43) and the air pressure expansion sealing ring (45) are each provided in two sets. The other set of the connecting tube (42) is sleeved on the inner side below the wire harness sheath (44), and the other set of the air pressure expansion sealing ring (45) is provided on the outer side below the wire harness sheath (44).

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