Electric heating aging test device for electrical materials and use method of electric heating aging test device

Abstract

The invention discloses an electrical material electrothermal aging test device and a use method thereof, and relates to the technical field of electrical material test equipment, in particular to an electrical material electrothermal aging test device and a use method thereof, comprising a heating box body, a transmission mechanism and a tray bracket; the heating box body is provided with a through hole for introducing a wire, the transmission mechanism is arranged on the heating box body, the tray bracket is connected to the transmission mechanism, and the transmission mechanism drives the tray bracket to move up and down relative to the heating box body. The device has the advantage that a user can easily adjust the distance between the tray and a sample on the tray and the interior of the heating box body. By means of the design, operation is simpler and more convenient, meanwhile, it is ensured that a proper safety distance is kept between the sample and the inner wall in the high-temperature environment, and sample damage or potential safety hazards caused by overheating are avoided. The space can be efficiently utilized, limited space resources can be utilized to the maximum extent on the premise that enough intervals among the samples are guaranteed, and the aging test requirements of the samples of different sizes and shapes are met.

Description

Technical Field

[0001] The invention relates to the technical field of electrical material testing equipment, and in particular to an electrical material electric thermal aging testing device and a use method thereof. Background Art

[0002] Under certain environmental conditions, the internal structure of materials (whether natural or synthetic) will change, causing the performance to gradually decay and deteriorate until it loses its use value. This process is called material aging. This phenomenon is widely found in many fields such as electrical, construction, automotive, and aerospace. For example, insulating materials and anti-corona materials in the electrical field, concrete and steel in the construction field, rubber and plastic parts in the automotive industry, and composite materials in the aerospace field will all be affected by aging. Their service life and safety.

[0003] In order to measure the material's ability to resist aging, it is necessary to conduct an aging test on it. That is, to use laboratory equipment to simulate the changes in the performance of the material under long-term operation in actual operation in the shortest possible time, which is the so-called accelerated aging, so as to speed up the completion of the experiment. A good artificial accelerated aging experimental method must have equivalence, typicality and repeatability, among which equivalence is often the most important, because only with equivalence can the aging process of the insulating material be truly reflected.

[0004] There are many test methods for material aging, but according to the working conditions of the materials, they can be roughly divided into two categories: natural aging test methods and artificial aging test methods. The characteristic of the natural aging test method is to use the natural environment to age the material, mainly including: underwater burial test, seawater immersion test, underground burial test, warehouse storage test and atmospheric environment test, etc. The artificial aging test is mainly through artificial methods, using test equipment in the laboratory to simulate the environment in which the material is in operation, and at the same time, by enhancing one or more aging factors of the aging effect to accelerate the aging degree of the material and shorten the test time, so some people call it artificial accelerated aging test method or artificial simulated aging test. The main difference between it and natural aging is that it uses artificial methods to age the material, so it can be referred to as "artificial aging test", or more precisely, "artificial accelerated aging test".

[0005] The aging behavior of electrical materials such as insulating materials and anti-corona materials under the combined effects of heat and electricity, the so-called electrothermal aging, is related to the design, operation and life evaluation of electrical equipment and is of great significance. This type of electrothermal aging examines the changes in the performance of electrical materials under the long-term effects of two aging factors, voltage and temperature. Therefore, it is often necessary to conduct it under high voltage and control the temperature conditions. Summary of the invention

[0006] The present invention aims to overcome the above-mentioned shortcomings of the prior art and provide an electric material electric thermal aging test device and a method of using the same.

[0007] The technical solution adopted by the present invention is as follows:

[0008] An electric thermal aging test device for electrical materials comprises: a heating box, a transmission mechanism and a tray bracket; the heating box is provided with a through hole for passing the electric wire, the transmission mechanism is arranged on the heating box, the tray bracket is connected to the transmission mechanism, and the transmission mechanism drives the tray bracket to move up and down relative to the box.

[0009] Furthermore, the through hole is arranged at the upper end of the heating box.

[0010] Furthermore, the transmission mechanism includes gears and chains. The gears include two groups, each group has two gears, which are arranged inside the heating box. A transmission chain is meshed between the gears on the same side, and the rotation of the gears drives the chain to move up and down.

[0011] Furthermore, the transmission mechanism also includes a handwheel arranged on the outside of the heating box, and the handwheel is connected to the gear to drive the gear to rotate.

[0012] Furthermore, the hand wheel comprises two gears which are respectively arranged on both sides; and the hand wheel is provided with a locking device.

[0013] Furthermore, one side of the chain is meshed with the gear, and one side is connected to a tray bracket, and both sides of the tray bracket are respectively connected to the chains on both sides of the heating box.

[0014] Furthermore, it includes a tray, and the tray bracket is provided with multiple layers of slots for placing the tray.

[0015] Furthermore, a method for using an electrical material electrothermal aging test device comprises the following steps:

[0016] S1: Determine the safe distance between the sample and the upper and lower shells of the oven according to the voltage required for the sample test;

[0017] S2: According to the safety distance, turn the hand wheel to adjust the position of the tray bracket, fix the electrical material sample to be tested on the tray, and place the tray in the appropriate position of the tray bracket;

[0018] S3: Determine the oven temperature according to the temperature required for the sample test;

[0019] S4: Connect the sample to the high voltage and connecting wires, pass the cables through the oven holes, connect the transformer and ground;

[0020] S5: closing the oven door;

[0021] S6: Turn on the transformer and adjust it to the required voltage;

[0022] S7: Turn on the oven and set the heating temperature;

[0023] S8: Start the electrothermal aging test;

[0024] S9: The experiment ends when the set time or the sample is destroyed;

[0025] S10: Turn off high pressure and oven heating;

[0026] S11: When the belt temperature drops to room temperature, take out the sample, check and record the aging condition of the sample;

[0027] S12: Clean the equipment.

[0028] Furthermore, in step S2, different samples are fixed in slots of different heights of the tray bracket respectively; the height of each layer of the tray is adjusted by rotating the hand wheel to ensure that an appropriate distance is maintained between each sample and between the sample and the inside of the heating box; after the test, the sample is taken out and performance evaluation and comparative analysis are carried out.

[0029] Furthermore, in step S8, according to the characteristics of the sample, the position of the sample is continuously adjusted by the hand wheel, and the transformer adjusts the voltage to simulate the temperature and voltage fluctuations of the real environment.

[0030] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0031] 1. Flexible adjustment of safety distance: By shaking the hand wheel, the user can easily adjust the distance between the tray and the sample on it and the inside of the heating box. This design makes the operation easier and ensures that the sample is kept at an appropriate safety distance from the inner wall in a high temperature environment, avoiding damage to the sample or safety hazards caused by overheating.

[0032] 2. Efficient use of space: The multi-layer tray design allows multiple specimens to be placed at one time for parallel testing, greatly improving the experimental efficiency. In addition, through densely distributed uniform brackets, limited space resources can be maximized while ensuring sufficient spacing between specimens, which is suitable for aging test needs of specimens of different sizes and shapes.

[0033] 3. Enhanced stability and reliability: The application of the locking device enhances the stability of the entire transmission mechanism, preventing accidental movement or loosening during long-term operation, thereby ensuring the accuracy and repeatability of the test results. This is especially important for research that requires long-term continuous observation of the material aging process.

[0034] 4. Simplified maintenance process: All parts are connected with standardized interfaces, which is convenient for disassembly and cleaning or replacement of damaged parts, reducing daily maintenance costs. This not only helps to extend the service life of the equipment, but also provides users with a more convenient and efficient use experience.

[0035] 5. Promote technological innovation and development: By improving the traditional aging test method, this device not only improves the existing technical level, but also provides strong support for the development of new high-efficiency materials in the future. It provides researchers with an experimental platform that is closer to actual working conditions, which helps to accelerate the research and development of new materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a front view structural schematic diagram of the present invention;

[0037] Figure 2 It is a schematic diagram of the internal side structure of the present invention;

[0038] Figure 3 It is a schematic diagram of the structure of the tray support of the present invention.

[0039] Markings in the figure:

[0040] 1-heating box, 2-tray bracket, 3-through hole, 4-gear, 5-chain, 6-handwheel, 7-tray, 8-slot.

[0041] Specific Examples

[0042] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] In this embodiment, if Figure 1 , 2 As shown, an electric thermal aging test device for electrical materials includes: a heating box 1, a transmission mechanism and a tray 7 bracket 2; the heating box 1 is provided with a through hole 3 for passing the electric wire, the transmission mechanism is arranged on the heating box 1, the tray 7 bracket 2 is connected to the transmission mechanism, and the transmission mechanism drives the tray 7 bracket 2 to move up and down relative to the box.

[0045] The heating box 1 is usually made of high temperature resistant and corrosion resistant stainless steel or aluminum alloy. An insulation layer is provided inside the heating box 1 to improve thermal efficiency and ensure uniform temperature distribution. An insulating layer is provided outside the box to prevent heat loss and burns to operators. Different sizes can be customized according to experimental requirements. Common sizes include small laboratory and large industrial sizes. Equipped with an over-temperature protection device and an emergency stop button to ensure safety during the experiment.

[0046] The transmission mechanism includes components such as a gear 4, a chain 5, and a hand wheel 6. The gear 4 is driven to rotate by rotating the hand wheel 6, thereby driving the chain 5 to move up and down, thereby achieving height adjustment of the tray 7 bracket 2. The transmission mechanism is compact in design, easy to operate, and can accurately control the position of the tray 7.

[0047] The tray 7 support 2 is made of a metal frame and has good load-bearing capacity and stability. It is used to fix and support multiple layers of trays 7, and the samples to be tested can be placed on each layer of trays 7. The tray 7 support 2 can be moved up and down by a transmission mechanism to meet the test requirements of different heights.

[0048] Furthermore, the through hole 3 is arranged at the upper end of the heating box 1 .

[0049] The through hole 3 is provided at the upper end of the heating box 1 for the wire to pass through, ensuring that the sample is connected to the high voltage power supply without affecting the temperature distribution in the heating box 1. Insulating material is provided around the through hole 3 to avoid the risk of short circuit.

[0050] Furthermore, the transmission mechanism includes gears 4 and chains 5. The gears 4 include two groups, each group has two gears, and are arranged on the inner side of the heating box 1. A transmission chain 5 is meshed between the gears 4 on the same side. The rotation of the gears 4 drives the chain 5 to move up and down.

[0051] A set of gears 4 is arranged at the upper and lower ends of the same side of the heating box 1, and is driven by a chain 5. Two sets of gears are arranged on both sides of the heating box 1 to keep the balance on both sides when driving the tray 7 bracket 2 to move.

[0052] Furthermore, the transmission mechanism also includes a hand wheel 6 arranged on the outside of the heating box 1, and the hand wheel 6 is connected to the gear 4 for driving the gear 4 to rotate.

[0053] The hand wheel 6 is connected to one of the gears 4 via a connecting shaft. Turning the hand wheel 6 drives the gear 4 to rotate, and the gear 4 drives the chain 5 to move up and down, and the chain 5 drives the tray 7 bracket 2 to move, thereby controlling the distance between the sample and the heating box 1.

[0054] Furthermore, the hand wheel 6 includes two, which are respectively arranged on the gears 4 on both sides; the hand wheel 6 is provided with a locking device.

[0055] Two handles are provided to control two gears 4 respectively, so that the tray 7 bracket 2 can maintain balance during movement to prevent it from tilting. The locking device includes two forms: mechanical lock and electronic lock. It is ensured that the hand wheel 6 will not rotate accidentally after being adjusted into place, ensuring stability during the experiment. The user can activate or release the locking state through simple operation.

[0056] Furthermore, one side of the chain 5 is meshed with the gear 4 , and one side is connected to the tray 7 bracket 2 , and both sides of the tray 7 bracket 2 are respectively connected to the chain 5 on both sides of the heating box 1 .

[0057] One side (inside) of the chain 5 is meshed with the gear 4 for transmission, and the other side (outside) is connected to the tray 7 bracket 2 and fixed at one point to increase its travel range.

[0058] Furthermore, it includes a tray 7 , and the tray 7 support 2 is provided with multiple layers of slots 8 for placing the tray 7 .

[0059] The slots 8 are arranged at intervals of 1=5 cm to achieve the purpose of multi-layer placement. The tray 7 is usually made of high temperature resistant and chemical corrosion resistant materials. The surface of the tray 7 is flat, and the edges have slots 8 for fixing the sample to prevent the sample from sliding during the test. According to the shape and size of the sample, a variety of trays 7 are provided for selection.

[0060] It also includes a control system, including components such as a temperature controller, a voltage regulator, and a timer. It monitors and adjusts the temperature of the heating box 1, the applied voltage, and the test time in real time. It is equipped with an intuitive and easy-to-use display and operation buttons to facilitate users to set parameters.

[0061] Furthermore, a method for using an electrical material electrothermal aging test device comprises the following steps:

[0062] S1: Determine the safe distance between the sample and the upper and lower shells of the oven according to the voltage required for the sample test;

[0063] Ensure that the sample does not touch the inner wall of the heating box 1 during the test to avoid damage to the sample or test failure due to overheating. According to the material characteristics and size of the sample, consult relevant information or consult the manufacturer to obtain the recommended minimum safety distance.

[0064] S2: According to the safety distance, shake the hand wheel 6 to adjust the position of the tray 7 bracket 2, fix the electrical material sample to be tested on the tray 7, and place the tray 7 at the appropriate position of the tray 7 bracket 2;

[0065] Adjust the height of the tray 7 support 2 to meet the safety distance requirements determined in step S1. Rotate the hand wheel 6 clockwise until it reaches the specified position to ensure that the samples on each layer of the tray 7 are properly protected.

[0066] S3: Determine the oven temperature according to the temperature required for the sample test;

[0067] Prepare and install the sample for subsequent aging test. Fix the sample on the tray 7 using a suitable clamp or adhesive, and then place the tray 7 in the corresponding position of the tray 7 support 2.

[0068] S4: Connect the sample to the high voltage and connecting wires, pass the cables through the oven holes, connect the transformer and ground;

[0069] Ensure that the specimen is properly connected to the power supply while ensuring electrical safety. Use professional tools to carefully complete the wiring work and ensure that all connection points are firm and reliable.

[0070] S5: closing the oven door;

[0071] S6: Turn on the transformer and adjust it to the required voltage;

[0072] S7: Turn on the oven and set the heating temperature;

[0073] Start the aging test and accelerate the aging process of the material by controlling the temperature. Set the target temperature according to the experimental plan, start the heating device and wait for it to reach the predetermined value.

[0074] S8: Start the electrothermal aging test;

[0075] The aging test officially begins, and the performance of the sample in this environment is recorded. After confirming that all preparations are completed, press the start button and the system will automatically enter the running state.

[0076] S9: The experiment ends when the set time or the sample is destroyed;

[0077] Continue to observe the changes in the sample until the preset time is reached or obvious physical damage occurs. Check the status of the sample regularly and take photos and archive them if necessary for later analysis and comparison.

[0078] S10: Turn off high pressure and oven heating;

[0079] Terminate the aging test and cool the device down. Disconnect the power first and then turn off the heating switch to allow the device to cool down naturally to room temperature.

[0080] S11: When the belt temperature drops to room temperature, take out the sample, check and record the aging condition of the sample;

[0081] Evaluate the state of the sample after a certain period of aging and collect data for further research. Use professional tools to carefully observe the changes in the surface and internal structure of the sample and record them in detail.

[0082] S12: Clean the equipment.

[0083] Keep the equipment clean to extend its service life. Use a special cleaning agent to wipe the internal and external surfaces to remove dust and residues; check whether each component is functioning normally, and repair or replace any abnormalities in a timely manner.

[0084] Furthermore, in step S2, different samples are fixed in different height slots 8 of the tray 7 bracket 2; the height of each layer of the tray 7 is adjusted by rotating the hand wheel 6 to ensure that an appropriate distance is maintained between each sample and between the sample and the inside of the heating box 1; after the test, the sample is taken out and performance evaluation and comparative analysis are carried out.

[0085] The multi-layer tray 7 design allows multiple samples to be placed at one time for parallel testing, greatly improving the experimental efficiency. In addition, through densely distributed uniform racks, limited space resources can be maximized while ensuring sufficient spacing between samples, which is suitable for aging test needs of samples of different sizes and shapes.

[0086] Furthermore, in step S8, according to the characteristics of the sample, the position of the sample is continuously adjusted by the hand wheel 6, and the transformer adjusts the voltage to simulate the temperature and voltage fluctuations of the real environment.

[0087] By continuously adjusting the position of the sample through the hand wheel 6 and using the transformer to simulate the temperature and voltage fluctuations in the real environment, the aging behavior of the material under complex and changing conditions can be more accurately reflected. This is of great significance for predicting the performance of the material in actual use. The design allows the user to flexibly adjust the height and voltage of the sample according to different test requirements to adapt to various application scenarios. Whether it is a small laboratory study or quality monitoring on a large industrial production line, satisfactory results can be obtained.

[0088] The above description is only a preferred embodiment of the invention and is not intended to limit the invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the invention should be included in the protection scope of the invention.

Claims

1. An electric thermal aging test device for electrical materials, characterized by: include: A heating box (1), a transmission mechanism and a tray (7) bracket (2); the heating box (1) is provided with a through hole (3) for passing an electric wire, the transmission mechanism is arranged on the heating box (1), the tray (7) bracket (2) is connected to the transmission mechanism, and the transmission mechanism drives the tray (7) bracket (2) to move up and down relative to the heating box (1).

2. According to the electric material electric thermal aging test device described in claim 1, it is characterized by: The through hole (3) is arranged at the upper end of the heating box (1).

3. The electric thermal aging test device for electrical materials according to claim 1, characterized in that: The transmission mechanism comprises gears (4) and chains (5); the gears (4) comprise two groups, each group having two gears, which are arranged inside the heating box (1); a transmission chain (5) is arranged to mesh between the gears (4) on the same side; the rotation of the gears (4) drives the chain (5) to move up and down.

4. The electric thermal aging test device for electrical materials according to claim 3, characterized in that: The transmission mechanism also includes a hand wheel (6) arranged on the outside of the heating box (1); the hand wheel (6) is connected to the gear (4) and is used to drive the gear (4) to rotate.

5. The electric thermal aging test device for electrical materials according to claim 4, characterized in that: The handle wheel (6) comprises two gears (4) respectively arranged on both sides; the hand wheel (6) is provided with a locking device.

6. The electric thermal aging test device for electrical materials according to claim 3, characterized in that: One side of the chain (5) is meshed with the gear (4), and one side is connected to a tray (7) bracket (2), and both sides of the tray (7) bracket (2) are respectively connected to the chains (5) on both sides of the heating box (1).

7. The electric thermal aging test device for electrical materials according to claim 1, characterized in that: It comprises a tray (7), wherein the tray (7) support (2) is provided with multiple layers of slots (8) for placing the tray (7).

8. A method for using an electric material electrothermal aging test device, applied to an electric material electrothermal aging test device according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: Determine the safe distance between the sample and the upper and lower shells of the oven according to the voltage required for the sample test; S2: according to the safety distance, the hand wheel (6) is turned to adjust the position of the tray (7) support (2), the electrical material sample to be tested is fixed on the tray (7), and the tray (7) is placed at a suitable position of the tray (7) support (2); S3: Determine the oven temperature according to the temperature required for the sample test; S4: Connect the sample to the high voltage and connecting wires, pass the cables through the oven holes, connect the transformer and ground; S5: closing the oven door; S6: Turn on the transformer and adjust it to the required voltage; S7: Turn on the oven and set the heating temperature; S8: Start the electrothermal aging test; S9: The experiment ends when the set time or the sample is destroyed; S10: Turn off high pressure and oven heating; S11: When the belt temperature drops to room temperature, take out the sample, check and record the aging condition of the sample; S12: Clean the equipment.

9. The method for using the electric thermal aging test device for electrical materials according to claim 8, characterized in that: In the step S2, different samples are respectively fixed in slots (8) of different heights of a tray (7) support (2); the height of each layer of the tray (7) is adjusted by rotating a hand wheel (6) to ensure that appropriate distances are maintained between the samples and between the samples and the interior of the heating box (1); after the test is completed, the samples are taken out and performance evaluation and comparative analysis are performed.

10. The electric thermal aging test device for electrical materials according to claim 8, characterized in that: In step S8, the position of the sample is continuously adjusted by the hand wheel (6) according to the characteristics of the sample, and the transformer adjusts the voltage to simulate the temperature and voltage fluctuations of the real environment.

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