Temperature-adjustable tracking test device

Abstract

The temperature-adjustable tracking test device comprises a base, a support table, two platinum electrodes, an electrolyte container and a circuit part, the electrolyte container is communicated with a liquid injection pipe and an electrolyte dropper, and the two platinum electrodes are both connected with a test cable, and is characterized in that an electric heating plate is fixed on the support table; a to-be-tested solid insulating material is placed on the electric heating plate, the electric heating plate is connected with a power line for heating the electric heating plate, a temperature sensor exposed out of the upper surface of the electric heating plate is arranged in the center of the electric heating plate, and the temperature sensor is used for detecting the temperature of the to-be-tested solid insulating material. According to the temperature-adjustable tracking test device, the contact heating of the electric heating plate and the solid insulating material is adopted, the heat transfer effect of the connection state of the solid insulating material and the conductor in the practical engineering application is simulated to the maximum extent, and the obtained test data is more accurate; and the tracking resistance of the solid insulating material can be truly evaluated.

Description

Technical Field

[0001] This utility model relates to a testing device, and more specifically, to a temperature-adjustable tracking leakage test device. Background Technology

[0002] In equipment testing, solid insulating materials are a common insulating medium, and their tracking resistance directly affects the safety and reliability of the equipment. Solid insulating materials are typically used to isolate conductors at different potentials and also provide structural support. In engineering, tracking tests are commonly used to evaluate the material's performance. Traditional tracking resistance tests are mainly conducted at laboratory temperatures, relying on air transmission to raise the temperature of the solid insulating material to the required test temperature. This method introduces errors in temperature control and ignores the heat transfer effect that occurs when the solid insulating material is connected to a conductor in actual engineering applications, resulting in different temperatures at the material contact points.

[0003] Therefore, users not only need to pay attention to the performance of solid insulating materials in tracking tests at different temperatures, but also need to consider the actual application scenarios of solid insulating materials and conduct relevant preliminary tests to comprehensively evaluate their performance. This paper proposes a temperature-adjustable tracking test device that can simulate the actual working scenarios of solid insulating materials to the greatest extent and conduct tracking resistance tests at different temperatures. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned technical problems, this utility model provides a temperature-adjustable tracking test device.

[0005] This utility model relates to a temperature-adjustable tracking current testing device, comprising a base, a support platform, two platinum electrodes, an electrolyte container, and a circuit section. The support platform is mounted on the base, with the two platinum electrodes and the electrolyte container positioned above it. The electrolyte container is connected to an injection pipe and a downward-facing electrolyte dropper. Both platinum electrodes are connected to test cables, which are connected to the circuit section. The device is characterized by: a heating plate fixed on the support platform; the solid insulating material to be tested is placed on the heating plate; the heating plate is connected to a power supply line for heating it; a temperature sensor protruding from the upper surface of the heating plate is positioned in the center of the heating plate, and the temperature sensor is used to detect the temperature of the solid insulating material to be tested; the temperature sensor is connected to a temperature signal line, and both the temperature signal line and the power supply line are connected to the circuit section.

[0006] The present invention relates to a temperature-adjustable tracking current testing device. The circuit consists of a PLC logic controller and a human-machine interface (HMI). The HMI is connected to the PLC logic controller, which is connected to the test cable and power supply line and controls their on / off states. The signal input terminal of the PLC logic controller is connected to the temperature signal line. The HMI is used for human-machine interaction and information display.

[0007] The present invention relates to a temperature-adjustable tracking current testing device. The support platform is connected to the base via a lifting mechanism. Four vertical guide rods are evenly fixed on the periphery of the lower surface of the support platform. A vertical lead screw is fixed in the center of the lower surface of the support platform. The base has cylindrical cavities for inserting the guide rods and the lead screw. A rotatable turntable is provided on the base around the lead screw, and a nut that mates with the lead screw thread is fixed on the turntable.

[0008] The present invention relates to a temperature-adjustable tracking current testing device, wherein a sleeve and an L-shaped bracket are fixed on both sides of the base, the lower end of the L-shaped bracket is inserted into the inner cavity of the sleeve, a platinum electrode is fixed to the upper end of the L-shaped bracket, and a locking screw is provided on the sleeve to control the depth of the L-shaped bracket inserted into the sleeve.

[0009] The beneficial effects of this utility model are as follows: The temperature-adjustable tracking resistance testing device of this utility model is provided with a base, a support platform, two platinum electrodes, an electrolyte container, an electrolyte dropper, and a circuit section. An electric heating plate is installed on the support platform for contact heating of the solid insulating material to be tested. A temperature sensor is installed on the electric heating plate to detect the temperature of the solid insulating material. Thus, under the control of the circuit section, power is supplied to the electric heating plate via a power line to heat the solid insulating material. The heating temperature is controlled by the temperature information collected by the temperature sensor. Because contact heating between the electric heating plate and the solid insulating material is used, the heat transfer effect of the solid insulating material connected to a conductor in actual engineering applications is simulated to the greatest extent. This makes the tracking resistance test of the solid insulating material closer to the actual engineering application scenario, and the obtained tracking resistance test data of the solid insulating material is more accurate, which is beneficial for truly evaluating the tracking resistance performance of the solid insulating material. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the temperature-adjustable tracking test device of this utility model.

[0011] In the diagram: 1. Base, 2. Support platform, 3. Platinum electrode, 4. Electrolyte container, 5. Electrolyte dropper, 6. Test cable, 7. Injection tube, 8. Solid insulating material, 9. Heating plate, 10. Temperature sensor, 11. Power cord, 12. Temperature signal line, 13. Guide rod, 14. Lead screw, 15. Turntable, 16. Sleeve, 17. L-shaped bracket, 18. Locking screw. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] like Figure 1 The diagram shows the structure of the temperature-adjustable tracking current testing device of this invention. The device consists of a base 1, a support platform 2, two platinum electrodes 3, an electrolyte container 4, a heating plate 9, and a circuit. The base 1 provides fixation and support. The support platform 2 is mounted on the base 1, and the heating plate 9 is fixed to the support platform 2. The solid insulating material 8 to be tested is fixed to the heating plate 9, allowing the heating plate 9 to heat the solid insulating material 8 in contact. The two platinum electrodes 3 are located above the support platform 2, and each electrode 3 is connected to a test cable 6, which is connected to the circuit.

[0014] The electrolyte container 4 is located above the support platform 2. A vertically downward-facing electrolyte dropper 5 is mounted on the electrolyte container 4, which is also connected to an injection pipe 7. During the test, the electrolyte flows into the electrolyte container 4 through the injection pipe 7 and then drips onto the surface of the solid insulating material 8 between the two platinum electrodes 3 via the electrolyte dropper 5. The voltage applied to the two platinum electrodes 3 via the test cable 6 is conducted through the surface of the solid insulating material 8 coated with electrolyte. The tracking resistance of the solid insulating material 8 is evaluated by measuring the current flowing through the test cable 6.

[0015] Since the solid insulating material 8 is in contact with the conductor in actual engineering applications, that is, the conductor transfers heat to the solid insulating material 8 through the heat transfer effect, causing the solid insulating material 8 to heat up. Therefore, in order to simulate the scenario of the solid insulating material 8 in actual applications to the greatest extent, this utility model proposes to fix the heating plate 9 on the support platform 2 and use the heating plate 9 to heat the solid insulating material 8 in contact.

[0016] The heating plate 9 shown is connected to a power cord 11, which is connected to the heating resistance wire inside the heating plate 9 to heat the heating plate 9. A temperature sensor 10 is located in the center of the heating plate 9, protruding from its upper surface. When a solid insulating material 8 is placed on the heating plate 9, the temperature sensor 10 comes into contact with the solid insulating material 8 to measure its temperature. The temperature sensor 10 is connected to a temperature signal line 12, and both the temperature signal line 12 and the power cord 11 are connected to the circuitry to control the heating and temperature measurement of the heating plate 9.

[0017] As can be seen, since the solid insulating material 8 to be tested is heated in contact with the heating plate 9, the heat transfer effect between the solid insulating material 8 and the conductor in actual engineering applications is simulated, making the leakage tracking test of the solid insulating material 8 more accurate and able to more precisely reflect the tracking resistance of the solid insulating material 8.

[0018] The circuit consists of a PLC logic controller and a human-machine interface (HMI). The HMI is connected to the PLC logic controller, which in turn is connected to the test cable 6 and the power supply line 11 to control their on / off states. The signal input terminal of the PLC logic controller is connected to the temperature signal line 12 to measure the temperature of the solid insulating material 8. The HMI is used for human-machine interaction and information display.

[0019] The support platform 2 shown is connected to the base 1 via a lifting mechanism. The lifting mechanism consists of four guide rods 13, one lead screw 14, a turntable 15, and a nut. The four guide rods 13 are vertically and evenly fixed on the lower surface of the support platform 2, and the lead screw 14 is vertically fixed at the center of the lower surface of the support platform 2. The base 1 has a cylindrical cavity to accommodate the four guide rods 13 and the lead screw 14, so that the guide rods 13 and the lead screw 14 can be raised and lowered.

[0020] A turntable 15 is provided on the upper part of the support platform 2. A nut that is threaded into the lead screw 14 is fixed in the center of the turntable 15. The nut is rotatably fixed to the upper end of the support platform 2, that is, the nut can rotate around the lead screw 14, but cannot move along the axial direction of the lead screw 14. In this way, by rotating the turntable 15 in different directions, the support platform 2 can be driven to rise and fall through the transmission pair formed by the nut and the lead screw 14, so as to facilitate the testing of solid insulating materials 8 of different thicknesses.

[0021] The two platinum electrodes 3 shown can also be raised and lowered in the height direction. Sleeves 16 are fixed to both sides of the base 1. The interior of the sleeves 16 is hollow, and an L-shaped bracket 17 is inserted into the internal cavity of the sleeve 16. The upper end of the L-shaped bracket 17 faces the support platform 2, and the platinum electrodes 3 are fixed to the upper end of the L-shaped bracket 17. A locking screw 18 is fixed to the sleeve 16 to lock the raised and lowered position of the L-shaped bracket 17 within the sleeve 16. Thus, by utilizing the raising and lowering of the L-shaped bracket 17 within the sleeve 16, and the raising and lowering of the support platform 2, it is convenient to conduct tracking tests on solid insulating materials 8 of different thicknesses.

Claims

1. A temperature-adjustable tracking current testing device, comprising a base (1), a support platform (2), two platinum electrodes (3), an electrolyte container (4), and a circuit section, wherein the support platform is disposed on the base, the two platinum electrodes and the electrolyte container are both located above the support platform, the electrolyte container is connected to an injection pipe (7) and a downward-facing electrolyte dropper (5), and both platinum electrodes are connected to test cables (6), the test cables being connected to the circuit section; characterized in that: A heating plate (9) is fixed on the support platform. The solid insulating material (8) to be tested is placed on the heating plate. The heating plate is connected to a power line (11) for heating it. A temperature sensor (10) is set in the center of the heating plate, protruding from its upper surface. The temperature sensor is used to detect the temperature of the solid insulating material to be tested. The temperature sensor is connected to a temperature signal line (12). Both the temperature signal line and the power line are connected to the circuit part.

2. The temperature-adjustable tracking test device according to claim 1, characterized in that: The circuit consists of a PLC logic controller and a human-machine interface (HMI). The HMI is connected to the PLC logic controller, which is connected to the test cable (6) and the power supply line (11) and controls their on / off states. The signal input terminal of the PLC logic controller is connected to the temperature signal line (12). The HMI is used for human-machine interaction and information display.

3. The temperature-adjustable tracking test device according to claim 1 or 2, characterized in that: The support platform (2) is connected to the base (1) via a lifting mechanism. Four vertical guide rods (13) are evenly fixed on the periphery of the lower surface of the support platform. A vertical lead screw (14) is fixed in the center of the lower surface of the support platform. A cylindrical cavity for inserting the guide rod and the lead screw is provided on the base. A rotatable turntable (15) is provided on the base around the lead screw. A nut that is threaded with the lead screw is fixed on the turntable.

4. The temperature-adjustable tracking test device according to claim 1 or 2, characterized in that: Both sides of the base (1) are fixed with sleeves (16) and L-shaped brackets (17). The lower end of the L-shaped bracket is inserted into the inner cavity of the sleeve. The platinum electrode (3) is fixed at the upper end of the L-shaped bracket. The sleeve is provided with a locking screw (18) to control the depth of the L-shaped bracket inserted into the sleeve.

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