Air exhaust type pressure maintaining test instrument for wire harness sealing element

Abstract

The utility model discloses an air exhaust type pressure maintaining test instrument for a wire harness sealing element, and the instrument comprises a cavity which is used for installing a plastic housing, and is internally provided with a trigger switch; the airlock is arranged on one side of the cavity and used for locking the plastic shell, the airlock is connected with an airlock electromagnetic valve, and the airlock electromagnetic valve is connected with the trigger switch; the vacuum generator is connected with the cavity and used for enabling the cavity and the plastic shell to form negative pressure, one end of the vacuum generator is connected with a negative pressure electromagnetic valve, the other end of the vacuum generator is connected with a check electromagnetic valve, and the negative pressure electromagnetic valve and the air lock electromagnetic valve are both connected with an air source; the check electromagnetic valve is connected with the cavity; and the PLC is connected with the negative pressure electromagnetic valve and the digital display meter, and the PLC is connected with an ON switch. And the cavity is connected with a digital display meter. And the check electromagnetic valve is connected with the OFF switch. And the PLC is connected with a qualified display lamp and an unqualified display lamp. Negative pressure detection is carried out on the plastic shell through a special gas circuit design, the detection accuracy is high, a PLC is adopted for control, implementation of automation is facilitated, and the detection efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the field of automobile wire harness processing, in particular to an air extraction type pressure maintaining test instrument for wire harness sealing parts. Background Art

[0002] The plastic shell is a material installed on the automotive wiring harness for plug-in terminals. Existing testing instruments can only detect whether there is a sealing plug-in inside the plastic shell, but cannot test for subtle air leaks. As a result, some plastic shells in special positions will penetrate with the accumulation of rainwater, causing oxidation of the terminals and affecting their use. Utility Model Content

[0003] The utility model aims to provide a wire harness seal air extraction type pressure-maintaining test instrument to solve the problem of short service life of the wire harness due to the failure of the existing plastic shell to perform sealing test or incomplete test.

[0004] To achieve the above purpose, the utility model provides the following technical solution: a wire harness seal air extraction pressure test instrument, comprising:

[0005] The cavity is used to install the plastic shell, and a trigger switch is arranged inside the cavity;

[0006] An air lock is arranged on one side of the cavity and is used to lock the plastic shell. The air lock is connected to an air lock solenoid valve, and the air lock solenoid valve is connected to a trigger switch;

[0007] A vacuum generator is connected to the mold cavity and is used to create negative pressure in the mold cavity and the plastic shell. One end of the vacuum generator is connected to a negative pressure solenoid valve, and the other end is connected to a check solenoid valve. Both the negative pressure solenoid valve and the air lock solenoid valve are connected to an air source; the check solenoid valve is connected to the mold cavity for pressure relief.

[0008] The cavity is connected with a digital display, which is used to display the negative pressure value in the cavity and transmit the data to the PLC controller.

[0009] It also includes a PLC controller, which is connected to a digital display, an ON switch and an OFF switch for signal input, and the PLC controller is connected to a negative pressure solenoid valve, a check solenoid valve and an air lock solenoid valve for signal output.

[0010] The PLC controller is connected with a qualified indicator light and a failed indicator light. The indicator light can be distinguished by green or red, and its working state includes: always on, flashing, always off.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model of the wire harness seal air extraction pressure test instrument can perform negative pressure detection on the plastic shell through a special air path design, has high detection accuracy, adopts PLC control, is conducive to the implementation of automation, and can improve detection efficiency. It solves the problem of short service life of the wire harness caused by the existing plastic shell not being tested for sealing or not being tested thoroughly. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure numerals: 1. Cavity; 11. Trigger switch; 2. Air lock; 21. Air lock solenoid valve; 3. Vacuum generator; 31. Negative pressure solenoid valve; 32. Check solenoid valve; 4. Air source; 5. Digital display; 6. PLC controller; 61. ON switch; 62. OFF switch; 63. Qualified indicator light; 64. Unqualified indicator light. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0016] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate directions or positions, and the relationship is based on the directions or positional relationships shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1 As shown, the wire harness seal air extraction pressure holding test instrument of this embodiment includes:

[0020] The cavity 1 is used to install the plastic shell, and a trigger switch 11 is arranged inside the cavity 1; the cavity 1 is connected to a digital display meter 5 for testing and displaying the pressure value in the cavity 1.

[0021] The air lock 2 is arranged on one side of the cavity 1 and is used to lock the plastic shell. The air lock 2 is connected to an air lock solenoid valve 21, and the air lock solenoid valve 21 is connected to the trigger switch 11. When the trigger switch 11 is turned on, the air lock solenoid valve 21 is turned on, and the air lock solenoid valve 21 is controlled to be closed or cut off by the PLC controller.

[0022] The vacuum generator 3 is connected to the cavity 1 and is used to form a negative pressure between the cavity 1 and the plastic shell. One end of the vacuum generator 3 is connected to a negative pressure solenoid valve 31, and the other end is connected to a check solenoid valve 32. The negative pressure solenoid valve 31 and the air lock solenoid valve 21 are both connected to the air source 4; the check solenoid valve 32 is connected to the cavity 1 for pressure relief.

[0023] PLC controller 6, PLC controller 6 is connected with digital display 5, ON switch 61 and OFF switch 62 for signal input, and PLC controller 6 is connected with negative pressure solenoid valve 31, check solenoid valve 32 and air lock solenoid valve 21 for signal output. When ON switch 61 is triggered, negative pressure solenoid valve 31 works, after digital display 5 reaches the preset value, ON switch 61 is closed, check solenoid valve 32 is started, and pressure relief can be performed, PLC controller 6 controls negative pressure solenoid valve 31 to close, OFF switch 62 is triggered, PLC controller 6 will disconnect air lock solenoid valve 21, stop air intake of air lock 2, and make air lock 2 return to its position so that the plastic shell can be taken out. The above information input and output are executed by the PLC system.

[0024] The PLC controller 6 is connected with a qualified indicator light 63 and a failed indicator light 64 for signal output, and different colored lights can be used for distinction.

[0025] The working principle of this utility model:

[0026] When in use, the plastic shell is inserted into the cavity 1. The internal design of the cavity 1 is consistent with the shape of the plastic shell, so that it can better meet the test. After insertion, the trigger switch 11 will be touched, so that the air lock solenoid valve 21 is turned on, and the gas from the gas source 4 enters the air lock 2 through the air lock solenoid valve 21, so that the air lock 2 works and the plastic shell is locked. At this time, the detection can be started, and the ON switch 61 is triggered for detection. The ON switch 61 transmits the opening information to the PLC controller 6. The PLC controller controls the negative pressure solenoid valve 31 to be turned on, and a negative pressure is formed in the cavity through the vacuum generator 3. The negative pressure is set to 50kPa. When the digital display 5 reaches 50kPa, the PLC controller 6 controls the negative pressure solenoid valve 31 to be turned off, and the gas is restricted by the check solenoid valve 32 and cannot pass through, so that the cavity is in a pressure-maintaining state. After a certain period of time (usually 1-3s), the pressure remains in the set range, and it is considered that the sealing of the plastic shell is qualified. At this time, the PLC controller 6 controls the qualified display light 63 to be always on, and a green light can be used for identification. The plastic shell can be taken out, the OFF switch 62 is triggered, the check solenoid valve 32 is turned on, the gas can be depressurized through the check solenoid valve 32, and the air lock solenoid valve 21 is closed at the same time, the air lock 2 releases the restriction on the plastic shell, and the plastic shell can be pulled out. During the process of vacuuming and pressure maintaining, the qualified indicator light 63 can be controlled to flash to show that it is in working state. If the pressure during the pressure maintaining process is not within the set range, the plastic shell inspection is unqualified, and the PLC controller controls the unqualified indicator light 64 to light up, which can be marked with a red light. After taking out the plastic shell, the indicator lights are all off.

[0027] The entire test process can be automated, precisely controlled and the results can be visualized, which can effectively improve the detection efficiency and accuracy. Through clear indications of pass and fail, operators can quickly understand the test results.

[0028] The above is only an embodiment of the utility model, and the common sense such as the known specific structure and characteristics in the scheme is not described too much here. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model. Any figure mark in the claims should not be regarded as limiting the claims involved.

Claims

1. A wire harness seal air extraction pressure test instrument, characterized in that: include: The cavity (1) is used to install the plastic shell, and a trigger switch (11) is arranged inside the cavity; An air lock (2) is arranged on one side of the mold cavity (1) and is used to lock the molded shell. The air lock (2) is connected to an air lock solenoid valve (21), and the air lock solenoid valve (21) is connected to a trigger switch (11); A vacuum generator (3) is connected to the mold cavity (1) and is used to form a negative pressure between the mold cavity (1) and the plastic shell. One end of the vacuum generator (3) is connected to a negative pressure solenoid valve (31), and the other end is connected to a check solenoid valve (32). Both the negative pressure solenoid valve (31) and the air lock solenoid valve (21) are connected to an air source (4); the check solenoid valve (32) is connected to the mold cavity (1) and is used to release pressure.

2. The wire harness seal air extraction pressure tester according to claim 1, characterized in that: The mold cavity (1) is connected to a digital display (5).

3. The wire harness seal air extraction pressure tester according to claim 2, characterized in that: The device also comprises a PLC controller (6), wherein the PLC controller (6) is connected to a digital display (5), an ON switch (61) and an OFF switch (62) for signal input, and the PLC controller (6) is connected to a negative pressure solenoid valve (31), a check solenoid valve (32) and an air lock solenoid valve (21) for signal output.

4. The wire harness seal air extraction pressure tester according to claim 3, characterized in that: The PLC controller (6) is connected to a qualified display light (63) and a failed display light (64).

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