CN206311712U - A kind of experimental rig for simulating solid insulating material bubble-discharge defect - Google Patents

Abstract

The utility model relates to a test device for simulating air-gap discharge defects of solid insulating materials, which comprises a high-voltage lead wire, an insulating isolation cover, a high-voltage electrode, a plurality of air-gap discharge models and a grounding electrode. Among them, the insulating isolation cover is set on the ground electrode to form a closed space, the high-voltage electrode and the air-gap discharge model are located in the closed space, and the air-gap discharge model is fixed on the ground electrode, and the high-voltage electrode is fixed on the air-gap discharge model; the high-voltage lead wire The switch is connected to the high-voltage electrode through the branch lead; the ground electrode is connected to the earth through the ground wire. The utility model is equipped with a plurality of air gap discharge defect models of different specifications. During the test, the defect models can be freely switched according to the test working conditions, and then combined with high-voltage electrodes, grounding electrodes and other components to conduct simulation tests on insulating air gap defects of different sizes, which can accurately , Effectively judge whether the insulation performance of solid insulation materials for high-voltage electrical equipment is good.

Description

A test device for simulating air-gap discharge defects of solid insulating materials

technical field

The utility model relates to the technical field of defect testing of solid insulating materials, in particular to a test device for simulating air gap discharge defects of solid insulating materials.

Background technique

The insulation performance of high-voltage electrical equipment directly affects the safe operation of the power grid system. Materials such as epoxy resin and cross-linked polyethylene are the main solid insulating materials on high-voltage electrical equipment. During the production process of these solid insulating materials, due to the level of manufacturing technology, the technical level of operators and the characteristics of the materials themselves, These solid insulating materials often lead to microscopic air bubbles, which leads to the destruction of the insulation performance of high-voltage electrical equipment and brings hidden dangers to the safe operation of the power grid system. Therefore, it is an important issue to inspect the insulation performance defects of solid insulation materials for high-voltage electrical equipment.

In the prior art, in order to test the insulation performance defects of solid insulating materials for high-voltage electrical equipment, test samples are usually cut directly from the formed high-voltage electrical equipment insulation structure or manually set test samples, and then, for these test samples, pulse current is used The AC withstand voltage or partial discharge test is carried out by methods such as method and ray detection method, and the insulation performance of the solid insulating material for high-voltage electrical equipment is judged according to the results of the AC withstand voltage or partial discharge test.

However, the above methods for testing insulation performance defects of solid insulating materials for high-voltage electrical equipment are only improvements in inspection methods, and the test samples are directly cut from the formed high-voltage electrical equipment insulation structure, making it difficult to determine the quality of the cut test samples. Whether the insulation performance is disturbed by air gap defects or other defects. In addition, the artificially set sampling method for the test samples makes it difficult to control the shape and size of the air gap, which brings difficulties to the development of the test.

Utility model content

In order to overcome the problems in the related technology, the utility model provides a test device for simulating air gap discharge defects of solid insulating materials.

A test device for simulating air-gap discharge defects of solid insulating materials, comprising: high-voltage leads, insulating isolation covers, high-voltage electrodes, multiple air-gap discharge models, and ground electrodes; wherein, the insulating isolation covers are arranged on the ground electrodes A closed space is formed above, the high-voltage electrode and the air-gap discharge model are located in the closed space, and the air-gap discharge model is fixed on the ground electrode, and the high-voltage electrode is fixed on the air-gap discharge model; The high-voltage lead is connected to the high-voltage electrode through a transfer switch through a branch lead; the ground electrode is connected to the earth through a ground wire.

Preferably, the air gap discharge model includes a solid insulating block, and the solid insulating block is provided with a cavity passing through the solid insulating block, and the upper surface of the solid insulating block is in contact with the high voltage electrode.

Preferably, the specifications of the multiple air-gap discharge models are different, and the multiple air-gap discharge models are connected to the high-voltage lead wires through the rotation of the changeover switch.

Preferably, the transfer switch is composed of an insulating shell, and the transfer switch is a box-type structure, the outside of the transfer switch is provided with a door bolt, and the inside of the transfer switch is provided with a connecting copper sheet and a switching position; The shift position includes a plurality of terminals, and each of the terminals is connected to one of the branch leads; one end of the connecting copper sheet is connected to the high-voltage lead, and the other end is connected to the terminal.

Preferably, the number of the terminals is the same as that of the air-gap discharge model, which is 3-6.

Preferably, the insulating isolation cover is a transparent cover, and the insulating isolation cover is connected to the ground electrode through a fastening nut.

The technical solutions provided by the embodiments of the present invention may include the following beneficial effects:

The utility model provides a test device for simulating air-gap discharge defects of solid insulating materials, including high-voltage leads, insulating isolation covers, high-voltage electrodes, multiple air-gap discharge models and grounding electrodes; wherein, the insulating isolation covers are arranged on the A closed space is formed on the ground electrode, the high-voltage electrode and the air-gap discharge model are located in the closed space, and the air-gap discharge model is fixed on the ground electrode, and the high-voltage electrode is fixed on the air-gap discharge model. On the model: the high-voltage lead is connected to the high-voltage electrode through a transfer switch through a branch lead; the ground electrode is connected to the earth through a ground wire. The utility model is equipped with a plurality of air gap discharge defect models of different specifications. During the test, the air gap discharge defect models can be freely switched through the switch according to the specific test conditions, so as to conduct simulation tests for air gap defects of different sizes, and pass High-voltage electrodes, grounding electrodes and other components provide test voltage and ensure test safety. The utility model can solve the problem of lack of a test device for effectively simulating air gap discharge defects of solid insulating materials in the prior art.

It should be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention.

Description of drawings

The accompanying drawings, which are incorporated in the specification and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and are used together with the specification to explain the principle of the utility model.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art In other words, other drawings can also be obtained from these drawings without paying creative labor.

Figure 1 is a schematic diagram of the overall structure of a test device for simulating air-gap discharge defects of solid insulating materials provided by an embodiment of the present invention;

Fig. 2 is a schematic diagram of the external overall structure of the transfer switch provided by the embodiment of the utility model;

Fig. 3 is a schematic diagram of the internal detailed structure of the transfer switch provided by the embodiment of the utility model;

Fig. 4 is a schematic structural diagram of an air gap discharge model provided by an embodiment of the present invention.

Symbol means:

1-High-voltage lead wire, 2-Transfer switch, 21-Insulation shell, 22-Door bolt, 23-Connecting copper sheet, 24-Transition gear, 3-Branch lead wire, 4-High voltage electrode, 5-Insulation isolation cover, 6 -Air-gap discharge model, 61-solid insulating block, 62-cavity, 7-ground electrode, 8-fastening nut.

detailed description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present invention. Rather, they are merely examples of devices and methods consistent with aspects of the invention as recited in the appended claims.

Referring to Fig. 1, Fig. 1 is a schematic diagram of the overall structure of a test device for simulating air-gap discharge defects of solid insulating materials provided by an embodiment of the present invention. The test device in Fig. 1 includes five parts: high voltage lead wire 1, insulating isolation cover 5, high voltage electrode 4, multiple air gap discharge models 6 and ground electrode 7.

Among them, the high-voltage lead 1 is connected to the high-voltage electrode 4 through the switch 2 and the branch lead 3. The high-voltage lead 1 can provide a high voltage for testing, and this high voltage is applied to the air-gap discharge model 6 through the high-voltage electrode 4 and the ground electrode 7. superior. Specifically, the air-gap discharge model 6 is fixed on the ground electrode 7, and the high-voltage electrode 4 is fixed on the air-gap discharge model 6. This connection makes a potential difference between the high-voltage electrode 4 and the ground electrode 7, so that the air-gap discharge model 6 provides high voltage. Here, the ground electrode 7, the air-gap discharge model 6 and the high-voltage electrode 4 are fixedly connected sequentially from bottom to top, and the close fit between the electrode and the air-gap discharge model is mainly achieved by the weight of the electrode plate.

The insulating isolation cover 5 is set on the ground electrode 7 to form a closed space, and the high-voltage electrode 4 and the air gap discharge model 6 are located in the closed space. The insulating isolation cover 5 can isolate the high voltage lead 1 from the air gap discharge model 6, thereby ensuring the reliability of the test. Safety, the ground electrode 7 is connected to the earth through the ground wire, which meets the national safety electricity requirements and can also ensure the safety of the test.

In addition, the insulating isolation cover 5 in the embodiment of the present invention is a transparent cover, which enables the test operator to conveniently observe the test situation of the air-gap discharge model 6 . The insulating isolation cover 5 is arranged on the ground electrode 7, specifically, the insulating isolation cover 5 can be connected with the ground electrode 7 through a fastening nut 8, so that the connection between the two is more firm.

Referring to Figure 2 and Figure 3, Figure 2 is a schematic diagram of the overall external structure of the transfer switch provided by the embodiment of the utility model, and Figure 3 is a schematic diagram of the detailed internal structure of the transfer switch provided by the embodiment of the utility model. As can be seen from FIG. 2 , the transfer switch 2 in this embodiment is composed of an insulating casing 21 , and the transfer switch 2 is a box-type structure, and a door bolt 22 is arranged outside the transfer switch 2 . The door bolt 22 is arranged on the outside of the insulating housing 21 and faces the side of the test operator, which can facilitate the operator to open or close the transfer switch 2 .

As can be seen from FIG. 3 , the transfer switch 2 is provided with a connecting copper sheet 23 and a transfer position 24 . Wherein, the switching position 24 includes a plurality of terminals, and each terminal is connected to a branch lead wire; one end of the connecting copper sheet 23 is connected to the high voltage lead wire 1, and the other end is connected to the terminal for conversion. The number of terminals is the same as that of the air-gap discharge model 6, which is 3-6, that is, each terminal corresponds to a branch lead 3 and an air-gap discharge model 6, and the three correspond one-to-one and the total number is the same. The number of terminals here can be set according to specific test requirements, and is not limited to 3-6. During the test, by changing the connection relationship between the connecting copper sheet 23 and different terminals, the transfer switch 2 is switched between various air gap discharge models 6 of different specifications, so as to realize the selection of various test conditions and facilitate flexible operation .

Referring to Fig. 4, Fig. 4 is a schematic structural diagram of an air gap discharge model provided by an embodiment of the present invention. The air gap discharge model 6 includes a solid insulating block 61 , and a cavity 62 penetrating through the solid insulating block 61 is provided on the solid insulating block 61 , and the upper surface of the solid insulating block 61 is in contact with the high voltage electrode 4 . The solid insulating block 61 is used to simulate the solid insulating material on the high-voltage electrical equipment, and the air in the cavity 62 is used to simulate the air gap in the solid insulating material.

The specifications of multiple air gap discharge models 6 are different, for example: the air gap length is 1 mm, 2 mm, 3 mm, etc., so that the test device can simulate various insulating air gap defects of different sizes. A plurality of air-gap discharge models 6 are connected to the high-voltage lead wire 1 through the rotation of the transfer switch 2, so that the air-gap discharge models 6 can withstand high voltage.

When using the test device in the utility model for testing, the ground electrode 7 is first connected to the earth through the ground wire, and a certain air gap discharge model 6 to be tested is selected to be fixed on the ground electrode 7, and then the high voltage electrode 4 is closely bonded. On the air-gap discharge model 6, then cover the air-gap discharge model 6 and the high-voltage electrode 4 with a transparent insulating isolation cover 5, and finally connect the high-voltage lead 1 to a branch lead 3 and the high-voltage electrode 4 through the conversion gear 24 .

To sum up, the utility model is equipped with a plurality of air gap discharge defect models of different specifications. During the test, the air gap discharge defect models can be freely switched through the changeover switch according to the specific test conditions, so as to conduct air gap defects of different sizes. Simulate test, and provide test voltage and ensure test safety through high-voltage electrodes, ground electrodes and other components. The utility model can provide an effective test device for simulating air-gap discharge defects of solid insulating materials, so that it can accurately and effectively judge high-voltage electrical Whether the insulation performance of the solid insulation material of the equipment is good.

Other embodiments of the invention will be readily apparent to those skilled in the art from consideration of the specification and practice of the invention disclosure herein. This application is intended to cover any modification, use or adaptation of the utility model, which follows the general principles of the utility model and includes common knowledge or common knowledge in the technical field not disclosed by the utility model. conventional technical means. The specification and examples are to be considered exemplary only, with a true scope and spirit of the invention indicated by the following claims.

It should be understood that the present invention is not limited to the precise structure which has been described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (6)

1. A test device for simulating air-gap discharge defects of solid insulating materials, characterized in that it comprises: high-voltage lead wires (1), insulating isolation cover (5), high-voltage electrodes (4), and multiple air-gap discharge models (6) and the ground electrode (7); where, The insulating isolation cover (5) is covered on the ground electrode (7) to form a closed space, the high voltage electrode (4) and the air gap discharge model (6) are all located in the closed space, and the air gap The discharge model (6) is fixed on the ground electrode (7), and the high voltage electrode (4) is fixed on the air gap discharge model (6); The high-voltage lead (1) is connected to the high-voltage electrode (4) through a switch (2) via a branch lead (3); The ground electrode (7) is connected to the ground through a ground wire. 2. the test device for simulating solid insulating material air-gap discharge defect according to claim 1, is characterized in that, described air-gap discharge model (6) comprises solid insulating block (61), and described solid insulating block (61 ) is provided with a cavity (62) passing through the solid insulating block (61), and the upper surface of the solid insulating block (61) is in contact with the high voltage electrode (4). 3. the test device for simulating the air-gap discharge defect of solid insulating material according to claim 1, is characterized in that, the specification of a plurality of described air-gap discharge models (6) is all different, and a plurality of described air-gap discharge models (6) are connected with the high-voltage lead wire (1) through the rotation of the transfer switch (2). 4. The test device for simulating air-gap discharge defects of solid insulating materials according to claim 1, characterized in that, the changeover switch (2) is made of an insulating housing (21), and the changeover switch (2) is Box-type structure, the outside of the transfer switch (2) is provided with a door bolt (22), and the inside of the transfer switch (2) is provided with a connecting copper sheet (23) and a conversion gear (24); The switching position (24) includes a plurality of terminals, and each of the terminals is connected to one of the branch leads (3); One end of the connecting copper sheet (23) is connected to the high-voltage lead wire (1), and the other end is converted and connected to the terminal. 5. The test device for simulating air-gap discharge defects of solid insulating materials according to claim 4, characterized in that, the number of said terminals is the same as that of said air-gap discharge model (6), which is 3-6. 6. The test device for simulating air-gap discharge defects of solid insulating materials according to claim 1, characterized in that, the insulating isolating cover (5) is a transparent cover, and the insulating isolating cover (5) is tightened by fastening nuts (8) connected to the ground electrode (7).