High-temperature electrode box for testing electrical strength

Abstract

The utility model discloses a high-temperature electrode box for testing electrical strength, and relates to the technical field of insulation material detection. Comprising a box body, a detection cavity is formed in the box body, an opening is formed in the top of the box body, the detection cavity is communicated with the outside through the opening, a telescopic sleeve is sleeved with the opening, a movable cavity is formed in the lower end of the telescopic sleeve, an upper electrode rod is sleeved with the movable cavity, and the top of the upper electrode rod is connected with the bottom of the movable cavity through a spring; the bottom of the binding post is located in the movable cavity and electrically connected with an upper electrode stem through a wire, an electrode is arranged at the bottom of the upper electrode stem, a lower electrode stem is arranged at the bottom of the detection cavity, an electrode is arranged at the top of the lower electrode stem, and the bottom of the lower electrode stem is grounded. The detection cavity is communicated with the outside through the access. According to the utility model, the temperature of the test environment can be controlled, and the electrical strength of the insulating material can be measured at different temperatures.

Description

Technical Field

[0001] The utility model relates to the technical field of insulating material detection, in particular to a high-temperature electrode box for electrical strength testing. Background Art

[0002] Insulation materials are an integral part of the power industry. Under certain voltages, insulation materials can experience internal breakdown, resulting in a loss of insulation properties. This can lead to circuit failures and serious risks to personal safety. Electrical strength testing is essential for insulation materials. Therefore, before leaving the factory, insulation materials must undergo a series of tests, including electrical strength testing, to verify their insulation properties. Electrical strength testing allows for the evaluation of insulation performance during the formulation phase, providing more accurate guidance for insulation material use and circuit design.

[0003] Insulating materials may also be used in high-temperature environments. When the temperature rises, the insulation properties of the insulating materials are different from those at room temperature. However, most electrical strength tests today can only be performed in transformer oil or in air, and can only be performed at room temperature. The test temperature cannot be significantly changed, and high-temperature environments cannot be effectively simulated. Utility Model Content

[0004] The main purpose of the utility model is to provide a high-temperature electrode box for electrical strength testing to solve the above problems.

[0005] To achieve the above-mentioned purpose, the utility model provides a high-temperature electrode box for electrical strength testing, comprising a box body, a detection cavity is provided in the box body, an opening is provided at the top of the box body, the detection cavity is communicated with the outside through the opening, a telescopic sleeve is provided in the opening and is fixedly connected to the box body, a movable cavity is provided in the movable cavity and an upper electrode rod is provided in the movable cavity and is slidably connected to the movable cavity, the top of the upper electrode rod is connected to the bottom of the movable cavity by a spring, a terminal is provided at the top of the telescopic sleeve, the bottom of the terminal is located in the movable cavity, the bottom of the terminal is electrically connected to the upper electrode rod through a wire, an electrode is provided at the bottom of the upper electrode rod, a lower electrode rod opposite to the upper electrode rod is provided at the bottom of the detection cavity, the electrode is provided at the top of the lower electrode rod, and the bottom of the lower electrode rod is grounded, heating rods are provided on both sides of the detection cavity, an entrance and exit are provided on one side of the detection cavity, and the detection cavity is communicated with the outside through the entrance and exit;

[0006] A door for controlling the opening and closing of the entrance and exit is provided on the side wall of the box body, and a temperature sensor is provided in the detection cavity.

[0007] Furthermore, heat insulation cotton and high-temperature alumina are provided on the inner walls of the detection cavity and the box door.

[0008] Furthermore, an upper heat-insulating and insulating fixing plate is provided on the top of the box body, and the upper heat-insulating and insulating fixing plate is provided with an upper insulating opening adapted to the opening, and the telescopic sleeve is arranged in the upper insulating opening and fixedly connected to the upper heat-insulating and insulating fixing plate.

[0009] Furthermore, a limiting plate is provided on the top of the upper electrode rod, and the limiting plate is slidably connected to the movable cavity. The upper electrode rod does not contact the telescopic sleeve. The bottom of the telescopic sleeve is provided with a limiting ring coaxial with the upper electrode rod, and the bottom of the upper electrode rod passes through the limiting ring. The inner diameter of the limiting ring is smaller than the diameter of the limiting plate.

[0010] Furthermore, a bolt opening is provided on the top of the telescopic sleeve, the terminal is a stud bolt and is sleeved in the bolt opening, and both ends of the terminal are connected to the telescopic sleeve through fixing nuts.

[0011] Furthermore, a lower heat-insulating and insulating fixing plate is provided at the bottom of the detection cavity, and the lower electrode rod is provided on the lower heat-insulating and insulating fixing plate.

[0012] Furthermore, the electrodes are detachably connected to the upper electrode rod and the lower electrode rod, and the electrodes are provided in a variety of styles.

[0013] The utility model has the following beneficial effects:

[0014] The utility model can control the temperature of the entire test environment, realize the measurement of the electrical strength of the insulating material at different temperatures, and can effectively simulate a high temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall schematic diagram of a high-temperature electrode box for electrical strength testing according to the present invention;

[0016] Figure 2 This is a schematic structural diagram of a high-temperature electrode box for electrical strength testing according to the present invention;

[0017] Figure 3 This is a schematic diagram of a telescopic sleeve of a high-temperature electrode box for electrical strength testing according to the present invention.

[0018] In the figure: 1-box body; 2-telescopic sleeve; 3-upper electrode rod; 4-spring; 5-terminal; 6-wire; 7-electrode; 8-lower electrode rod; 9-heating rod; 10-upper thermal insulation fixing plate; 11-limiting piece; 12-fixing nut; 13-lower thermal insulation fixing plate; 14-box door; 15-limiting ring. DETAILED DESCRIPTION

[0019] In order to achieve the above-mentioned purpose and effect, the technical means and structure adopted by the present invention are described in detail with reference to the accompanying drawings for the features and functions of the preferred embodiments of the present invention.

[0020] As attached Figure 1-3 As shown, the utility model provides a high-temperature electrode box for electrical strength testing, including a box body 1, a detection cavity is provided in the box body 1, an opening is provided at the top of the box body 1, the detection cavity is communicated with the outside through the opening, a telescopic sleeve 2 fixedly connected to the box body 1 is provided in the opening, a movable cavity is provided at the lower end of the telescopic sleeve 2, an upper electrode rod 3 slidably connected to the movable cavity is provided in the movable cavity, the top of the upper electrode rod 3 is connected to the bottom of the movable cavity by a spring 4, a terminal 5 is provided at the top of the telescopic sleeve 2, the bottom of the terminal 5 is located in the movable cavity, and the bottom of the terminal 5 is electrically connected to the upper electrode rod 3 through a wire 6. The bottom of the upper electrode rod 3 is connected to the electrode 7 through a stud bolt, and the bottom of the detection chamber is provided with a lower electrode rod 8 opposite to the upper electrode rod 3. The top of the lower electrode rod 8 is also provided with an electrode 7, and the bottom of the lower electrode rod 8 is connected to the ground wire. Heating rods 9 are provided on both sides of the detection chamber to heat the detection chamber. An entrance and exit are provided on one side of the detection chamber, and the detection chamber is connected to the outside world through the entrance and exit, which is convenient for the entry and exit of the sample to be tested. A box door 14 for controlling the opening and closing of the entrance and exit is provided on the side wall of the box body 1. The operator can close the box door before testing to improve the heating rate and insulation effect in the detection chamber.

[0021] During actual use, the operator can open the box door 14, lift the upper electrode rod 3 upwards and send the insulating material into the detection chamber from the entrance and exit. After placing the insulating material between the two electrodes 7, the upper electrode rod 3 is released. The upper electrode rod 3 will move downward under the action of the spring 4 so that the insulating material is pressed between the two electrodes 7, thereby fixing the insulating material. Then, the terminal 5 is connected to the high voltage end, and the heating rod 9 is started. The detection chamber is heated to different temperatures according to actual needs and feedback from the temperature sensor, so as to measure the electrical strength of the insulating material at different temperatures, which can be better used to evaluate the insulation properties of the insulating material at different temperatures.

[0022] In another embodiment, the inner walls of the detection chamber and the door 14 are provided with heat-insulating cotton and high-temperature aluminum oxide, thereby ensuring the temperature rise rate of the detection chamber and protecting the operator from being subjected to excessive heat.

[0023] In another embodiment, an upper heat-insulating and insulating fixing plate 10 is provided on the top of the box body 1. The upper heat-insulating and insulating fixing plate 10 is provided with an upper insulating opening adapted to the opening. The telescopic sleeve 2 is sleeved within the upper insulating opening and fixedly connected to the upper heat-insulating and insulating fixing plate 10. This provides support for the telescopic sleeve 2 and prevents damage to the operator caused by leakage.

[0024] In another embodiment, a limit plate 11 is provided at the top of the upper electrode rod 3. The limit plate 11 is slidably connected to the movable cavity, so that the upper electrode rod 3 does not contact the telescopic sleeve 2. A limit ring 15 is provided at the bottom of the telescopic sleeve 2, which is coaxial with the upper electrode rod 3. The bottom of the upper electrode rod 3 passes through the limit ring 15, and the inner diameter of the limit ring 15 is adapted to the diameter of the upper electrode rod 3. Thus, the limit ring 15 limits the upper electrode rod 3 and prevents the upper electrode rod 3 from leaving the telescopic sleeve 2.

[0025] In another embodiment, a bolt opening is provided on the top of the telescopic sleeve 2, and the terminal 5 is a stud bolt and is sleeved in the bolt opening. Both ends of the terminal 5 are connected to the telescopic sleeve 2 by fixing nuts 12. This facilitates the removal and replacement of the terminal 5.

[0026] In another embodiment, a lower thermal insulation fixing plate 13 is provided at the bottom of the detection chamber, and the lower electrode rod 8 is provided on the lower thermal insulation fixing plate 13 and fixed by bolts. The bottom of the lower electrode rod 8 passes through the lower thermal insulation fixing plate 13 and extends into the box body 1. The bottom of the lower electrode rod 8 is connected to the ground wire, thereby improving the stability of the lower electrode rod 8 and ensuring the stability of the insulating material during the experiment.

[0027] In another embodiment, the side wall of the chamber 1 is provided with a door 14 for sealing the entrance and exit. The inner wall of the door 14 is provided with thermal insulation cotton and high-temperature aluminum oxide. The operator can close the door before testing to further improve the temperature rise rate and heat preservation effect in the test chamber.

[0028] In another embodiment, the electrode 7 is detachably connected to the upper electrode rod 3 and the lower electrode rod 8, and the electrode 7 is provided in various styles. The operator can replace the electrode 7 of different sizes and styles according to the test needs to improve the applicability of the device.

[0029] The above description is only a preferred embodiment of the present invention, not all embodiments. Anyone should be aware that any structural changes made under the inspiration of the present invention, and any technical solutions that are the same or similar to those of the present invention, fall within the scope of protection of the present invention.

Claims

1. A high temperature electrode box for electrical strength testing, characterized in that: The invention comprises a box body (1), wherein a detection cavity is provided in the box body (1), an opening is provided at the top of the box body (1), and the detection cavity is communicated with the outside through the opening, a telescopic sleeve (2) fixedly connected to the box body (1) is provided in the opening, a movable cavity is provided at the lower end of the telescopic sleeve (2), an upper electrode rod (3) slidably connected to the movable cavity is provided in the movable cavity, the top of the upper electrode rod (3) is connected to the bottom of the movable cavity via a spring (4), a terminal (5) is provided at the top of the telescopic sleeve (2), and the terminal ( 5) is located in the active cavity, the bottom of the terminal (5) is electrically connected to the upper electrode rod (3) through a wire (6), the bottom of the upper electrode rod (3) is provided with an electrode (7), the bottom of the detection cavity is provided with a lower electrode rod (8) opposite to the upper electrode rod (3), the top of the lower electrode rod (8) is provided with the electrode (7), the bottom of the lower electrode rod (8) is grounded, heating rods (9) are provided on both sides of the detection cavity, and an entrance and exit are provided on one side of the detection cavity, and the detection cavity is connected to the outside world through the entrance and exit; A door (14) for controlling the opening and closing of the entrance and exit is provided on the side wall of the box body (1), and a temperature sensor is provided in the detection cavity.

2. A high-temperature electrode box for electrical strength testing according to claim 1, characterized in that: Heat insulation cotton and high-temperature aluminum oxide are provided on the inner walls of the detection cavity and the box door (14).

3. A high temperature electrode box for electric strength testing according to claim 1, characterized in that: An upper heat-insulating and insulating fixing plate (10) is provided on the top of the box body (1), and the upper heat-insulating and insulating fixing plate (10) is provided with an upper insulating opening adapted to the opening, and the telescopic sleeve (2) is sleeved in the upper insulating opening and fixedly connected to the upper heat-insulating and insulating fixing plate (10).

4. A high-temperature electrode box for electric strength testing according to claim 3, characterized in that: A limiting plate (11) is provided on the top of the upper electrode rod (3), the limiting plate (11) is slidably connected to the movable cavity, the upper electrode rod (3) does not contact the telescopic sleeve (2), and a limiting ring (15) coaxial with the upper electrode rod (3) is provided on the bottom of the telescopic sleeve (2), the bottom of the upper electrode rod (3) passes through the limiting ring (15), and the inner diameter of the limiting ring (15) is smaller than the diameter of the limiting plate (11).

5. A high temperature electrode box for electric strength testing according to claim 3, characterized in that: The top of the telescopic sleeve (2) is provided with a bolt opening, the terminal (5) is a stud bolt and is sleeved in the bolt opening, and both ends of the terminal (5) are connected to the telescopic sleeve (2) via fixing nuts (12).

6. A high-temperature electrode box for electric strength testing according to claim 3, characterized in that: A lower heat-insulating and insulating fixing plate (13) is provided at the bottom of the detection cavity, and the lower electrode rod (8) is provided on the lower heat-insulating and insulating fixing plate (13).

7. A high temperature electrode box for electric strength testing according to claims 1 to 6, characterized in that: The electrode (7) is detachably connected to the upper electrode rod (3) and the lower electrode rod (8), and the electrode (7) is provided in a variety of styles.

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