Coil test equipment and test method

Abstract

The invention belongs to the technical field of electromagnetic valves, and discloses test equipment and a test method of a coil. The coil testing equipment comprises a container, a vacuum pump and a pipeline, a containing cavity is formed in the container, a conductive solution is arranged in the containing cavity, an air outlet is formed in the container, and an electromagnetic coil is soaked in the conductive solution; one end of the pipeline is connected with the vacuum pump, the other end of the pipeline is communicated with the air outlet, and the vacuum pump is configured to vacuumize the containing cavity to enable the conductive solution to infiltrate the electromagnetic coil. The electromagnetic coil is subjected to infiltration treatment before the insulation and voltage resistance test by utilizing wettability and capillarity of solid and liquid in a vacuum state, so that defects in the electromagnetic coil are amplified, and the reliability and the accuracy of a test result are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic valves, and in particular to coil testing equipment and a testing method. Background Art

[0002] Electromagnetic coils are widely used in various electronic and electrical equipment. As an important component for generating magnetic fields, their performance directly affects the efficiency and reliability of the equipment. In the production and use of electromagnetic coils, insulation performance is a key indicator that can effectively prevent leakage, short circuits and other potential faults.

[0003] Traditional electromagnetic coil insulation withstand voltage test equipment and methods usually need to be carried out under normal pressure environment. Under normal pressure environment, the insulation defects inside the electromagnetic coil cannot be effectively displayed, and the reliability of the insulation test results is poor.

[0004] Therefore, there is an urgent need for a coil testing device and a coil testing method to solve the above technical problems. Summary of the invention

[0005] An object of the present invention is to provide a coil testing device to ensure that the insulation withstand voltage test result is more accurate and improve the reliability of the test result.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] Coil testing equipment, including:

[0008] A container, wherein a containing cavity is provided in the container, a conductive solution is provided in the containing cavity, an air outlet is provided on the container, and the electromagnetic coil is immersed in the conductive solution;

[0009] A vacuum pump and a pipeline, one end of the pipeline is connected to the vacuum pump, and the other end is connected to the gas outlet, and the vacuum pump is configured to evacuate the containing cavity so that the conductive solution infiltrates the electromagnetic coil;

[0010] Optionally, the coil testing equipment further comprises a vacuum pressure gauge, which is connected to the accommodating cavity and is used to display the vacuum degree of the accommodating cavity.

[0011] Optionally, the coil testing device further comprises a fluid replenishment component and a liquid level detector, wherein the liquid level detector is disposed in the containing cavity, the fluid replenishment component is communicatively connected to the liquid level detector, and the fluid replenishment component is configured to replenish the conductive solution into the containing cavity.

[0012] Optionally, the fluid infusion component includes a fluid infusion pump and a fluid infusion pipeline, one end of the fluid infusion pipeline is connected to a water source, and the other end is connected to the accommodating cavity, and the fluid infusion pump is arranged on the fluid infusion pipeline.

[0013] Optionally, the coil testing device further comprises a rack, wherein the rack is disposed in the accommodating cavity and is configured to place the electromagnetic coil.

[0014] Optionally, the storage plate of the storage rack is a hollow structure.

[0015] Optionally, the coil testing device further includes a heating component and a temperature detector, wherein the temperature detector is disposed in the accommodating cavity, the temperature detector is used to detect the temperature of the conductive solution, and the heating component is configured to heat the conductive solution.

[0016] Another object of the present invention is to provide a testing method for electromagnetic coils, which significantly improves the accuracy and reliability of the test results and provides an effective detection means for the quality control of the electromagnetic coils.

[0017] To achieve this object, the present invention adopts the following technical solutions:

[0018] A method for testing an electromagnetic coil is applied to the above-mentioned coil testing device, and the method for testing an electromagnetic coil comprises:

[0019] Placing the electromagnetic coil in a container, and adding a conductive solution into the container, wherein the conductive solution covers the electromagnetic coil;

[0020] Creating a vacuum state in the container, and maintaining the vacuum state for a preset time;

[0021] The electromagnetic coil is taken out and an insulation withstand voltage test is performed on the electromagnetic coil.

[0022] Beneficial effects:

[0023] The coil testing equipment provided by the present invention utilizes the wettability and capillary phenomenon of solids and liquids in a vacuum state to perform an immersion treatment on the electromagnetic coil before the insulation withstand voltage test, thereby amplifying the defects inside the electromagnetic coil and improving the reliability and accuracy of the test results.

[0024] Ensure that the insulation withstand voltage test results are more accurate and guarantee the reliability of the electromagnetic coil in various application scenarios.

[0025] The electromagnetic coil testing method provided by the present invention significantly improves the accuracy and reliability of the test results and provides an effective detection means for the quality control of the electromagnetic coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the structure of a coil testing device provided in Embodiment 7 of the present invention;

[0027] Figure 2It is a flow chart of the electromagnetic coil testing method provided in the eighth embodiment of the present invention.

[0028] In the figure:

[0029] 10. Electromagnetic coil;

[0030] 100. container; 110. containing chamber;

[0031] 200, vacuum pump; 210, pipeline;

[0032] 300. Vacuum pressure gauge. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] Embodiment 1

[0038] like Figure 1 As shown, this embodiment provides a coil testing device, which includes a container 100, a vacuum pump 200 and a pipeline 210. The container 100 is provided with a receiving chamber 110, and the receiving chamber 110 is provided with a conductive solution. The container 100 is provided with an air outlet. The electromagnetic coil 10 is immersed in the conductive solution ( Figure 1 The middle dotted line indicates the electromagnetic coil 10 immersed in the conductive solution. One end of the pipeline 210 is connected to the vacuum pump 200, and the other end is connected to the air outlet. The vacuum pump 200 is used to evacuate the containing chamber 110 (the specific vacuum degree and pressure holding time can be designed according to the process requirements to be achieved by the product), so that the containing chamber 110 reaches a negative pressure state and is maintained in the negative pressure state for a certain period of time, so that the conductive solution infiltrates into the electromagnetic coil 10, and then the container 100 is depressurized. After the pressure in the containing chamber 110 is consistent with the pressure outside the cavity, the container 100 is opened and the electromagnetic coil 10 is taken out to pass the insulation withstand voltage test.

[0039] The coil testing equipment provided in this embodiment utilizes the wettability and capillary phenomenon of solids and liquids in a vacuum state to perform an immersion treatment on the electromagnetic coil 10 before the insulation withstand voltage test, thereby amplifying the defects inside the electromagnetic coil 10 and improving the reliability and accuracy of the test results.

[0040] Specifically, the wettability and capillary phenomenon of solids and liquids under vacuum means that after the electromagnetic coil 10 is plastic-sealed, if there are certain defects in the combination of the plastic shell and the coil frame and the sealing is insufficient, the air in the tiny gap between the plastic shell and the coil frame will be sucked away under vacuum, and the conductive liquid will be absorbed into the tiny gap between the plastic shell and the coil frame. The creepage distance and insulation gap between the conductive solution and the winding of the electromagnetic coil 10 will be shortened, thereby amplifying the defects of the electromagnetic coil 10 to improve the reliability of the test results.

[0041] It should be noted that, in this embodiment, the coil testing equipment is used to perform insulation withstand voltage test on the electromagnetic coil 10 as an example. In other embodiments, the coil testing equipment can also test some motor stator coils. Through the same negative pressure infiltration process, the conductive solution can penetrate into the winding of the motor stator coil, ensuring that the defects of the motor stator coil are magnified during detection, thereby improving the reliability and accuracy of the detection results.

[0042] Optionally, the conductive solution in this embodiment may be water, and in other embodiments the conductive solution may also be salt water, alcohol solution or other liquid containing conductive ions, and the selection of these conductive solutions may be adjusted according to specific test requirements.

[0043] Alternatively, if Figure 1As shown, the coil test equipment further includes a vacuum pressure gauge 300, which is connected to the receiving chamber 110 and is used to display the vacuum degree of the receiving chamber 110. By accurately monitoring the vacuum degree in the receiving chamber 110, the working state of the vacuum pump 200 can be adjusted in time according to the test requirements to ensure that the vacuum degree in the receiving chamber 110 meets the requirements, thereby ensuring the accuracy and reliability of the test results.

[0044] Optionally, the coil testing equipment also includes a fluid replenishment component and a liquid level detector. The liquid level detector is disposed in the accommodating cavity 110. The fluid replenishment component is communicatively connected to the liquid level detector. The fluid replenishment component is used to replenish the conductive solution into the accommodating cavity 110, so as to maintain the concentration and performance of the conductive solution stable, thereby ensuring the consistency and reliability of each test.

[0045] Optionally, the rehydration component includes a rehydration pump and a rehydration pipeline 210, one end of the rehydration pipeline 210 is connected to a water source, and the other end is connected to the containing chamber 110. The rehydration pump is arranged on the rehydration pipeline 210, and the rehydration pump is communicatively connected to the liquid level detector. The rehydration pump can automatically start or stop working according to the change of the liquid level in the containing chamber 110, so as to ensure that the liquid level of the conductive solution is always maintained at an optimal state.

[0046] Optionally, the coil testing device further includes a rack, which is disposed in the accommodating cavity 110 and is configured to place the electromagnetic coil 10. The rack provides a stable support structure for the electromagnetic coil 10, ensuring that the electromagnetic coil 10 remains in a fixed position during the infiltration process, reducing the infiltration error caused by movement or tilting, and improving the accuracy of the test.

[0047] Optionally, the storage plate of the storage rack is a hollow structure. The hollow structure allows the conductive solution to flow freely under the storage plate, ensuring that the liquid can evenly cover the electromagnetic coil 10, improving the wetting effect, and thus improving the accuracy of the insulation withstand voltage test.

[0048] Optionally, the coil test equipment further includes a heating component and a temperature detector, the temperature detector is disposed in the accommodating cavity 110, the temperature detector is used to detect the temperature of the conductive solution, and the heating component is used to heat the conductive solution. Through the heating component, the test equipment can simulate a working environment under high temperature conditions, so that the insulation performance of the electromagnetic coil 10 under extreme conditions can be verified, thereby improving the reliability of the product.

[0049] Optionally, the heating component in this embodiment is an electric heating wire, which is arranged in a conductive solution. The electric heating wire has a simple structure and is relatively easy to maintain and replace, thereby reducing the maintenance cost of the equipment.

[0050] Embodiment 2

[0051] like Figure 2As shown, this embodiment provides a method for testing an electromagnetic coil, which is applied to the coil testing device in the first embodiment. The method for testing an electromagnetic coil includes:

[0052] The electromagnetic coil 10 is placed in a container 100, and a conductive solution is added into the container 100, so that the conductive solution covers the electromagnetic coil 10;

[0053] Forming a vacuum state in the container 100 and maintaining the vacuum state for a preset time;

[0054] The electromagnetic coil 10 is taken out and an insulation withstand voltage test is performed on the electromagnetic coil 10 .

[0055] The electromagnetic coil testing method of this embodiment significantly improves the accuracy and reliability of the test results, and provides an effective detection means for the quality control of the electromagnetic coil 10 .

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A coil testing device, characterized in that: include: A container (100), wherein a receiving chamber (110) is provided in the container (100), a conductive solution is provided in the receiving chamber (110), an air outlet is provided on the container (100), and the electromagnetic coil (10) is immersed in the conductive solution; A vacuum pump (200) and a pipeline (210), wherein one end of the pipeline (210) is connected to the vacuum pump (200) and the other end is connected to the gas outlet, and the vacuum pump (200) is configured to evacuate the containing chamber (110) so that the conductive solution can infiltrate the electromagnetic coil (10).

2. The coil testing device according to claim 1, characterized in that: The electromagnetic coil testing device further comprises a vacuum pressure gauge (300), wherein the vacuum pressure gauge (300) is in communication with the accommodating chamber (110), and the vacuum pressure gauge (300) is used to display the vacuum degree of the accommodating chamber (110).

3. The coil testing device according to claim 1, characterized in that: The coil testing device further comprises a fluid replenishment component and a liquid level detector, wherein the liquid level detector is disposed in the accommodating cavity (110), the fluid replenishment component is communicatively connected to the liquid level detector, and the fluid replenishment component is configured to replenish the conductive solution into the accommodating cavity (110).

4. The coil testing device according to claim 3, characterized in that: The fluid infusion assembly comprises a fluid infusion pump and a fluid infusion pipeline (210), one end of the fluid infusion pipeline (210) is connected to a water source, and the other end is connected to the accommodating chamber (110), and the fluid infusion pump is arranged on the fluid infusion pipeline (210).

5. The coil testing device according to claim 1, characterized in that: The coil testing device further comprises a storage rack, which is arranged in the accommodating cavity (110) and is configured to place the electromagnetic coil (10).

6. The coil testing device according to claim 5, characterized in that: The storage plate of the storage rack is a hollow structure.

7. The coil testing device according to claim 1, characterized in that: The electromagnetic coil testing device further comprises a heating component and a temperature detector, wherein the temperature detector is arranged in the accommodating cavity (110) and is used to detect the temperature of the conductive solution, and the heating component is configured to heat the conductive solution.

8. A method for testing an electromagnetic coil, applied to a coil testing device as claimed in any one of claims 1 to 7, characterized in that: The testing method of the electromagnetic coil comprises: Placing the electromagnetic coil (10) in a container (100), and adding a conductive solution into the container (100), wherein the conductive solution covers the electromagnetic coil (10); Creating a vacuum state in the container (100), and maintaining the vacuum state for a preset time; The electromagnetic coil (10) is taken out and an insulation withstand voltage test is performed on the electromagnetic coil (10).

Images