Direct insertion type wire harness sealing test device and density tester

Abstract

The utility model provides a direct plug type wire harness sealing testing device and a density measuring instrument, which comprise a hollow shell, a positioning head, a sliding plug body and an elastic piece, the sliding plug body is arranged in the hollow shell, the outer wall of the sliding plug body is provided with a protruding part, a cavity is divided into an air inlet cavity and a compression cavity, the center of the sliding plug body is of a hollow structure, and the elastic piece is arranged in the sliding plug body. The hollow shell is provided with a test ventilation opening, the test ventilation opening is communicated with an inner cavity of the sliding plug body, the elastic piece is located at an opening of the positioning head, the sliding plug body is pressed on the elastic piece, and air enters the air inlet to push the sliding plug body to extrude the elastic piece to be compressed towards the center. According to the sealing test connector, the sliding piston is pneumatically controlled to extrude the elastic piece, the elastic piece is deformed to clamp a wire rod, after a product to be tested extends into the sliding piston, a sealed environment is formed, the interior of the sliding piston is vacuumized or air pressure is increased, and the sealing performance of the product to be tested is judged according to the change of the air pressure after pressure maintaining.

Description

Technical Field

[0001] The utility model relates to the field of sealing detection equipment, in particular to a direct-insertion wire harness sealing test device and a density measuring instrument. Background Art

[0002] At present, large-square cables and wires in the electric vehicle field need to be tested for sealing after assembling joints and heat shrink seals and other structures. In the existing technology, the common method is to introduce air into the joints or wires, put them in water, and observe whether there are bubbles in the water to detect whether the product is sealed. This method is inefficient, and there is water residue on the surface of the product, which is difficult to detect, and the accuracy is poor, and it may even cause the product to be scrapped. High-precision sealing detection can generally be achieved by vacuum air testing and positive pressure waterless air testing. However, due to the structural characteristics of cables and wires, how to fix and achieve their sealing is the main problem to be solved. Utility Model Content

[0003] In order to solve the above technical problems, the utility model proposes a plug-in type wiring harness sealing test device, comprising

[0004] a hollow shell, wherein a cavity is provided in the hollow shell;

[0005] A positioning head, the positioning head being sealed and connected to one end of the housing;

[0006] A sliding plug body, the sliding plug body being located within the hollow shell and having an outer wall provided with a protrusion, the outer periphery of the protrusion being sealed against the inner wall of the hollow shell and dividing the cavity into an air inlet cavity and a compression cavity, the air inlet cavity being a sealed structure; an air inlet being provided on the hollow shell and communicating with the air inlet cavity; a hollow structure being provided at the center of the sliding plug body for inserting a test object, a test vent being provided on the hollow shell and communicating with the inner cavity of the sliding plug body;

[0007] An elastic member is located at the mouth of the positioning head, the sliding plug body is pressed on the elastic member, and the air intake of the air inlet pushes the sliding plug body to squeeze the elastic member toward the center to compress the object to be measured.

[0008] The resilient member is located in the compression chamber, and an exhaust hole is provided on the compression chamber.

[0009] Preferably, an annular gasket is provided at both ends of the elastic member.

[0010] Preferably, the positioning head includes an annular positioning end and an annular clamping portion integrally formed with the annular positioning end, the annular clamping portion is clamped and connected to the hollow shell, and a first sealing member is sleeved on the annular clamping portion.

[0011] Preferably, the positioning head includes an annular positioning end and an annular screw-on portion integrally formed with the annular positioning end, the outer wall of the annular screw-on portion is threadedly connected to the interior of the hollow shell, and a first sealing member is sleeved on the annular screw-on portion.

[0012] Preferably, the outer ring of the protrusion is provided with a second sealing member.

[0013] Preferably, a third sealing member is provided between the outer wall of the sliding plug body and the inner wall of the hollow shell.

[0014] Preferably, a fourth sealing member is provided between the outer wall of the sliding plug body and the inner wall of the positioning head.

[0015] Preferably, the resilient member is at least one set of springs, and the springs are pressed between the protrusion and the positioning head.

[0016] Preferably, the elastic member is rubber or silicone.

[0017] A direct-insertion high-voltage density tester includes a casing, on which is provided at least one set of direct-insertion wire harness sealing test devices, and at least one material trough; the casing is provided with at least one set of detection interfaces for sealing system reliability analysis, one end of the detection interface is connected to a pressure meter, and the other end is connected to a detection terminal.

[0018] The plug-in wire harness sealing test device and density meter proposed by the utility model have the following beneficial effects: the density measuring connector extrude the elastic part through the pneumatically controlled sliding piston, causing the elastic part to deform and thus clamp the wire, and after the product to be tested is inserted into the sliding piston, a sealed environment is formed and then the interior of the sliding piston is vacuumed or pressurized, and after the pressure is maintained, the sealing of the product to be tested is judged by the change in air pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments.

[0020] Figure 1 It is a three-dimensional schematic diagram of the direct plug-in wire harness sealing test device of the present utility model;

[0021] Figure 2 This is a cross-sectional view of the in-line wiring harness sealing test device of the present invention;

[0022] Figure 3 A schematic diagram of an embodiment of a positioning head of the present utility model;

[0023] Figure 4 A schematic diagram of another embodiment of the positioning head of the present invention;

[0024] Figure 5This is a three-dimensional schematic diagram of the direct-insertion high-voltage density measuring instrument of the present utility model;

[0025] Figure 6 This is a schematic diagram of the detection terminal of the utility model being inserted into the direct plug-in type wire harness sealing test device;

[0026] Figure 7 This is a schematic diagram of the detection terminal of the utility model;

[0027] Among them, 1. hollow shell; 2. positioning head; 3. sliding plug body; 4. protrusion; 5. air inlet chamber; 6. compression chamber; 7. air inlet; 8. test vent; 9. elastic member; 10. exhaust hole; 11. rebound member; 12. annular gasket; 13. annular screw-on portion; 131. annular clamping portion; 14. annular positioning end; 15. first seal; 16. second seal; 17. third seal; 18. fourth seal; 19. housing; 20. material trough; 21. plug-in wire harness sealing test device; 22. control switch; 23. detection interface; 24. detection terminal; 25. trachea. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] like Figure 1 、 Figure 2 As shown, the utility model proposes a plug-in type wiring harness sealing test device, including

[0030] A hollow housing 1 is provided with a cavity therein; in this embodiment, one end of the hollow housing 1 is open and the other end is closed, and an air inlet 7 and an air outlet are provided at the closed end. Of course, the positions of the air inlet 7 and the air outlet are not limited to the ends and may also be on the side walls;

[0031] The open end of the hollow shell 1 is connected to the positioning head 2, and the positioning head 2 is sealed with one end of the shell, wherein an embodiment of the positioning head 2 is: the positioning head 2 includes an annular positioning end 14, and an annular screw-on portion 13 integrally formed with the annular positioning end 14, the outer wall of the annular screw-on portion 13 is connected to the internal thread of the hollow shell 1, and of course the corresponding inner wall of the hollow shell 1 also has an internal thread, and a first sealing member 15 is sleeved on the annular screw-on portion 13, and the first sealing member 15 is a sealing ring. An annular groove can be set at any position of the annular screw-on portion 13, and a sealing ring is set in the annular groove to ensure the sealing of the connection between the positioning head 2 and the hollow shell 1.

[0032] Another embodiment of the connection between the positioning head 2 and the hollow shell 1 is: the positioning head 2 includes an annular positioning end 14, and an annular clamping portion 131 integrally formed with the annular positioning end 14, the outer diameter of the clamping portion is slightly smaller than the inner diameter of the hollow shell 1, and the annular clamping portion 131 is clamped and connected to the hollow shell 1, and a non-threaded connection can also be selected, but a clamping connection method can be selected. Similarly, in order to ensure the tight connection between the connected positioning head 2 and the hollow shell, a first sealing member 15 is sleeved on the annular clamping portion 131. When the annular clamping portion 131 is connected to the hollow shell 1, the first sealing member 15 is a sealing ring to further achieve the tightness of the connection between the two.

[0033] In addition, it should be noted that the hollow housing 1 and the positioning head 2 shown in this embodiment are in a cylindrical structure, but are not limited to the above structure, and any polygonal prism and the like may also be used.

[0034] A sliding plug body 3 is also provided in the hollow shell 1. The outer wall of the sliding plug body 3 is provided with a protrusion 4 on the circumference (a cylindrical design is selected in this embodiment, so the sliding plug body 3 also adopts a cylindrical structure, and the shape of the sliding plug body 3 is selected according to the shape of the hollow shell 1). A second sealing member 16 is provided on the outer circumference of the protrusion 4. A sealing ring can also be selected to seal and fit the inner wall of the hollow shell 1, and separate the cavity into an air intake chamber 5 and a compression chamber 6. An air inlet 7 is provided on the hollow shell 1, and the air inlet 7 is connected to the air intake chamber 5; an exhaust hole 10 is provided on the compression chamber 6. When the air inlet 7 takes air into the air intake chamber 5, since the air intake chamber 5 is a sealed structure, the air pressure will push the sliding plug body 3 to move toward the compression chamber 6. At this time, the exhaust hole 10 provided in the compression chamber 6 will discharge the original internal gas to facilitate the movement of the sliding plug body 3.

[0035] The sliding plug body 3 extends into the positioning head 2, and an elastic member 9 is pressed between the end of the sliding plug body 3 and the positioning head 2. The elastic member 9 can be made of a deformable elastic material such as rubber or silicone and is provided in an annular shape. It docks with the opening of the sliding plug body 3, and the outer ring is confined within the positioning head 2. The elastic member 9 is located at the opening of the positioning head 2, and the sliding plug body 3 presses on the elastic member 9. The air intake 7 pushes the sliding plug body 3 to squeeze the elastic member 9 toward the center to compress the object being measured. The center of the sliding plug body 3 is a hollow structure for the object being measured to extend into. When the sliding plug body 3 moves toward the elastic member 9, it squeezes the elastic member 9. The inner diameter of the annular elastic member 9 shrinks due to the force. That is, when the wire extends into the positioning head 2, passes through the elastic member 9, and extends into the sliding plug body 3, the elastic member 9 deforms, and the inner ring of the elastic member 9 presses the wire to achieve fixation and sealing. In order to ensure that the sliding plug body 3 squeezes the elastic member 9 more stably, annular gaskets 12 are provided at both ends of the elastic member 9 , and the annular gaskets are high-precision gaskets.

[0036] The hollow shell 1 is provided with a test vent 8, and the test vent 8 is communicated with the inner cavity of the sliding plug body 3;

[0037] Since the subsequent process needs to vacuum or pressurize the product clamped in the sliding plug body 3 and then determine whether it is sealed, a third seal 17 is provided between the outer wall of the sliding plug body 3 and the inner wall of the hollow shell 1, and a fourth seal 18 is provided between the outer wall of the sliding plug body 3 and the inner wall of the positioning head 2. The third seal 17 and the fourth seal 18 can both be sealing rings and are embedded in the side wall of the sliding plug body 3 to ensure sealing with the hollow shell 1.

[0038] After the test is completed, the air inlet 7 is deflated. To facilitate the return stroke of the sliding piston 3, the resilient member 11 is provided in the form of at least one set of springs. In this embodiment, three sets are provided, evenly arranged within the compression chamber 6. The springs are compressed between the protrusion 4 and the positioning head 2, providing a return thrust for the sliding piston. Of course, the resilient member can also be a soft internal member, such as an elastic rubber block. Any structure that deforms after being squeezed and has the ability to reset itself can be used.

[0039] The high-pressure density tester works as follows: In the initial state, the end of the wire to be tested for sealing is inserted into the positioning head 2 and extends through the elastic member 9 into the sliding plug body 3. Air is introduced through the air inlet 7, pushing the sliding plug body 3 to squeeze the elastic member 9 to achieve a clamped and sealed wire. After evacuating air or applying pressure and maintaining pressure through the test vent 8, if the wire interface and the interior of the wire are not sealed, the pressure tester connected to the test vent 8 will detect a pressure change, and the product will be determined to be leak-proof. After the measurement is completed, the air inlet 7 is released, the spring rebounds the sliding plug body 3, and the elastic member 9 releases the product, which can then be removed.

[0040] At the same time, this embodiment also proposes a direct-plug high-voltage density tester, including a housing 19, on which is provided at least one group of direct-plug wire harness sealing test devices 21 as described above, and on which is provided at least one material trough 20. The direct-plug wire harness sealing test devices can be arranged in one row, two rows or more rows, and multiple groups of material troughs 20 are arranged on the upper part. The material troughs 20 can be used to place wires to be tested or tested. Multiple settings can improve work efficiency. A control switch 22 can be provided at the lower part of the high-voltage density measurement connector to control the air inlet 7 to clamp or loosen the product, and the test result status can be displayed at the same time. The test result can be displayed by setting a light on the outer ring of the control switch 22. If the red light is on, the surface product sealing is unqualified, and if the green light is on, the surface sealing is qualified.

[0041] It should also be noted that in order to ensure the sealing reliability of the plug-in harness sealing test device itself, such as Figure 6 、 Figure 7As shown, at least one group of detection interfaces 23 for sealing system reliability analysis is provided on the casing 19, one end of the interface is connected to a pressure meter through an air pipe 25, one end of the detection interface 23 is connected to a pressure meter, and the pressure meter is on the inner side of the casing 19, so it is not drawn, and the other end is connected to a detection terminal 24, and there is an air passage in the detection terminal 24. When in use, the detection terminal 24 is inserted into the plug-in wire harness sealing test device, and the control switch is started. The sealing reliability of the instrument is judged by testing whether the pressure value of the pressure instrument changes, and the sealing can be marked by the lighting of the aforementioned control switch 22. Similarly, a red light indicates that the sealing reliability of the plug-in wire harness sealing test device does not meet the requirements, and a green light indicates that the sealing reliability meets the requirements. The above operations need to be performed regularly and the control system is set to remind.

Claims

1. A plug-in wire harness sealing test device, characterized in that: include A hollow shell (1), wherein a cavity is provided in the hollow shell (1); A positioning head (2), the positioning head (2) being sealed and connected to one end of the housing; A sliding plug body (3) is provided in the hollow shell (1), and a protrusion (4) is provided on the outer wall of the sliding plug body (3). The outer periphery of the protrusion (4) is sealed and fits the inner wall of the hollow shell (1), and the cavity is divided into an air inlet cavity (5) and a compression cavity (6). The air inlet cavity (5) is a sealed structure. An air inlet (7) is provided on the hollow shell (1), and the air inlet (7) is connected to the air inlet cavity (5). The center of the sliding plug body (3) is a hollow structure for the object to be tested to extend into. A test vent (8) is provided on the hollow shell (1). The test vent (8) is in communication with the inner cavity of the sliding plug body (3); An elastic member (9), the elastic member (9) is located at the mouth of the positioning head (2), the sliding plug body (3) is pressed on the elastic member (9), and the air intake through the air inlet (7) pushes the sliding plug body (3) to squeeze the elastic member (9) toward the center to compress the object to be measured; A resilient member (11) is located in the compression chamber (6), and an exhaust hole (10) is provided on the compression chamber (6).

2. The plug-in type wiring harness sealing test device according to claim 1, characterized in that: Annular gaskets (12) are respectively provided at both ends of the elastic member (9).

3. The plug-in type wiring harness sealing test device according to claim 1, characterized in that: The positioning head (2) comprises an annular positioning end (14), an annular clamping portion (131) integrally formed with the annular positioning end (14), the annular clamping portion (131) being clamped and connected to the hollow shell (1), and a first sealing member (15) being sleeved on the annular clamping portion (131).

4. The plug-in type wiring harness sealing test device according to claim 1, characterized in that: The positioning head (2) comprises an annular positioning end (14), an annular screw-on portion (13) integrally formed with the annular positioning end (14), an outer wall of the annular screw-on portion (13) being threadedly connected to the interior of the hollow shell (1), and a first sealing member (15) being sleeved on the annular screw-on portion (13).

5. The plug-in type wiring harness sealing test device according to claim 1, characterized in that: The outer ring of the protrusion (4) is provided with a second sealing member (16).

6. The plug-in type wire harness sealing test device according to claim 1, characterized in that: A third sealing member (17) is provided between the outer wall of the sliding plug body (3) and the inner wall of the hollow shell (1).

7. The plug-in type wire harness sealing test device according to claim 1, characterized in that: A fourth sealing member (18) is provided between the outer wall of the sliding plug body (3) and the inner wall of the positioning head (2).

8. The plug-in type wire harness sealing test device according to claim 1, characterized in that: The resilient member (11) is at least one group of springs, and the springs are pressed between the protrusion (4) and the positioning head (2).

9. The plug-in type wire harness sealing test device according to claim 1, characterized in that: The elastic member (9) is made of rubber or silicone.

10. A direct-insertion high-voltage density measuring instrument, characterized in that: The invention comprises a housing (19), wherein the housing (19) is provided with at least one set of plug-in wire harness sealing test devices as described in any one of claims 1 to 9, and the housing (19) is provided with at least one material trough (20); the housing (19) is provided with at least one set of detection interfaces for sealing system reliability analysis, and one end of the detection interface is connected to a pressure meter, and the other end is connected to a detection terminal.

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