High-voltage discharge gas arc extinguishing experiment device

Abstract

The utility model relates to a high-voltage discharge gas arc extinguishing experiment device. The device comprises a device frame, an insulating shell is arranged on the device frame, an insulating gas inlet and an insulating gas outlet are formed in the insulating shell, and a static conducting rod, a movable conducting rod, a static contact, a movable contact and an operating mechanism are arranged on the insulating shell. The insulating shell is communicated with a sealing sleeve for installing the movable conducting rod, an insulating block is arranged at the end part of the movable conducting rod in the sealing sleeve, and a first magnet or a first magnetic adsorption block is arranged on the insulating block. The operating mechanism comprises a second magnet or a second magnetic adsorption block which sleeves the outer side wall of the sealing sleeve and is used for being magnetically adsorbed with the first magnet or the first magnetic adsorption block, and inner cavities of the sealing sleeve on the two sides of the first magnet or the first magnetic adsorption block are communicated with each other for gas to pass through. And the operating mechanism drives the second magnet or the second magnetic adsorption block to drive the movable conducting rod to act. Compared with the prior art, the sealing effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of gas arc extinguishing, and in particular to a high-voltage discharge gas arc extinguishing experimental device. Background Art

[0002] SF6 electrical equipment has been widely used because of its excellent arc extinguishing performance and insulation strength, as well as good thermal conductivity. However, since SF6 gas is easy to liquefy and SF6 is a gas with a high greenhouse effect value, it has a great impact on the environment. Therefore, more insulating gases are needed to replace SF6 in electrical equipment. Then it is necessary to test the performance of these insulating gases such as arc extinguishing ability and insulation strength.

[0003] When testing the performance of insulating gas, an experimental device that is often used is an arc extinguishing device. Existing arc extinguishing devices generally include an insulating shell, a static conductive rod, a dynamic conductive rod, a static contact and a dynamic contact. The insulating shell is provided with an insulating gas inlet and an insulating gas outlet for injecting the insulating gas to be tested. A high voltage (usually a voltage level higher than 1000V) is applied between the static conductive rod and the dynamic conductive rod, and the distance between the dynamic contact and the static contact is adjusted by moving the dynamic conductive rod to test the arc extinguishing ability and insulation strength of the insulating gas.

[0004] For example, the Chinese invention patent application with application publication number CN 108549021 A discloses a test device and method for studying the arc extinguishing performance of environmentally friendly gas, in which the moving contact is installed in the cylinder through the moving contact support plate, and the cylinder is connected to an insulating pull rod, which passes through the dynamic sealing seat on the lower cover plate and is connected to the operating mechanism (drive motor, motor connecting rod and connecting rod). Since the insulating pull rod needs to pass through the insulating shell, a dynamic sealing seat needs to be provided to ensure the sealing performance between the insulating pull rod and the insulating shell during movement, so as to ensure that the insulating gas to be tested will not leak out. However, the arc extinguishing device of this structure is not only complex in structure, but also has unreliable sealing performance. In particular, as the number of experiments increases or the use time increases, there will be hidden dangers of poor sealing, resulting in deviations in the experimental results. Utility Model Content

[0005] The utility model aims to provide a high-voltage discharge gas arc extinguishing experimental device to solve the problems of complex structure and easy failure of sealing effect in the prior art.

[0006] To achieve the above-mentioned purpose, a high-voltage discharge gas arc extinguishing experimental device of the utility model adopts the following technical scheme: a high-voltage discharge gas arc extinguishing experimental device, comprising a device frame, an insulating shell is arranged on the device frame, an insulating gas inlet and an insulating gas outlet are arranged on the insulating shell, a static conductive rod and a dynamic conductive rod are arranged on the insulating shell, and a static contact is arranged at the end of the static conductive rod in the insulating shell, and a dynamic contact is arranged at the end of the dynamic conductive rod; the experimental device also includes an operating mechanism for driving the dynamic conductive rod to move; the insulating shell is connected with a sealing sleeve for the dynamic conductive rod to be installed, an insulating block is arranged at the end of the dynamic conductive rod in the sealing sleeve, and a first magnet or a first magnetic adsorption block is arranged on the insulating block; the operating mechanism includes a second magnet or a second magnetic adsorption block sleeved on the outer side wall of the sealing sleeve for magnetic adsorption with the first magnet or the first magnetic adsorption block, the inner cavities of the sealing sleeve on both sides of the first magnet or the first magnetic adsorption block are connected with each other for gas to pass through, and the operating mechanism drives the dynamic conductive rod to move by driving the second magnet or the second magnetic adsorption block.

[0007] There is a gap between the first magnet or the first magnetic adsorption block and the inner cavity of the sealing sleeve, so that the inner cavities of the sealing sleeve on both sides are connected to each other.

[0008] The first magnet or the first magnetic adsorption block is guided and installed in the inner cavity of the sealing sleeve, and the first magnet or the first magnetic adsorption block is provided with a through groove or a through hole communicating with the inner cavity of the sealing sleeve on both sides thereof.

[0009] The operating mechanism includes a lead screw rotatably arranged on a device frame and a movable block movably installed on the device frame for guiding and stopping rotation, a second magnet or a second magnetic adsorption block is arranged on the movable block, and the movable block is threadedly connected to the lead screw; the operating mechanism includes a driving motor, a driving wheel is arranged on the power output shaft of the driving motor, a driven wheel is arranged on the lead screw, and power is transmitted between the driving wheel and the driven wheel through teeth or a transmission belt.

[0010] A conductive block for the movable conductive rod to movably pass through is fixedly arranged inside the insulating shell, an electrode is arranged on the insulating shell, the electrode is connected to the conductive block through a conductive plate, and a conductive structure is arranged between the conductive block and the movable conductive rod.

[0011] The conductive block is provided with a through hole for the movable conductive rod to movably pass through, and the conductive structure includes a mounting hole provided on the conductive block and connected to the through hole, and a spring and a conductive column for always contacting with the movable conductive rod for electrical conduction under the action of the spring are provided in the mounting hole, and the conductive column contacts with the conductive block for electrical conduction.

[0012] The conductive column is a graphite column.

[0013] The insulating shell is provided with a vacuum port.

[0014] The insulating shell is provided with a connection port for installing a pressure gauge.

[0015] The insulating shell is provided with a pressure relief port for installing a safety valve.

[0016] The beneficial effects of the utility model are as follows: the sealing sleeve is connected to the inner cavity of the insulating shell, and the dynamic conductive rod can move in the sealing sleeve, which means that the dynamic conductive rod will not pass through the sealing sleeve and the insulating shell, and there is no need to set a dynamic sealing structure, which simplifies the structure of the experimental device. Moreover, the conductive rod will not pass through the sealing sleeve and the insulating shell, and the movement of the dynamic conductive rod is realized by the operating mechanism through the magnetic adsorption effect as a whole, and the sealing effect is good. Even if the use time is long or the number of times is many, it is not easy to cause the problem of gas leakage caused by the failure of the dynamic sealing structure as in the background technology, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of a high-voltage discharge gas arc extinguishing experimental device of the utility model;

[0018] Figure 2 yes Figure 1 A schematic diagram of the structure after removing the insulating shell;

[0019] Figure 3 yes Figure 1 A schematic diagram of the internal structure of a high-voltage discharge gas arc extinguishing experimental device;

[0020] Figure 4 yes Figure 3 A partial enlarged view of the middle A;

[0021] Figure 5 yes Figure 3 A partial enlarged view of point B in the middle. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that, unless otherwise defined, the technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0024] An embodiment of a high-voltage discharge gas arc extinguishing experimental device of the utility model is as follows Figure 1-Figure 5 As shown, it includes a device frame 1, and moving wheels 2 on the device frame are convenient for movement. An insulating shell 3 is also provided on the device frame, and an insulating gas inlet 4 and an insulating gas outlet 5 are provided on the insulating shell for entry and discharge of the insulating gas to be tested. The insulating shell is also provided with a vacuum port 6 for connection with a vacuum pump, and is used to exhaust the air or other gases inside the insulating shell before the insulating gas to be tested is sent in, so as to ensure the purity of the gas to be tested in the insulating shell. A connecting port 8 is provided on the insulating shell for installing a pressure gauge, which can monitor the pressure condition inside the insulating shell in real time. A pressure relief port 9 is provided on the insulating shell for installing a safety valve, which is used to ensure that the pressure inside the insulation can be maintained within a certain safety range. For ease of use, an air inlet valve can be provided at the insulating gas inlet, and an air outlet valve can be provided at the insulating gas outlet.

[0025] A static conductive rod 10 and a dynamic conductive rod 13 are provided on the insulating shell, and a static contact 12 is provided at the end of the static conductive rod in the insulating shell, and a dynamic contact 14 is provided at the end of the dynamic conductive rod. In this embodiment, a front observation window 7 and a rear observation window are provided on the insulating shell. In this embodiment, the insulating shell includes a cylinder and an upper sealing cover plate and a lower sealing cover plate. The static conductive rod 11 is fixedly mounted on the upper sealing cover plate through an insulating sleeve 11. A static contact 12 is provided at the end of the static conductive rod located inside the insulating shell. The static contact and the static conductive rod can be connected by a threaded connection to facilitate the replacement of the static contact. The shape of the static contact can be selected as needed, such as a flat contact and a ball-head contact. The dynamic conductive rod 13 passes downward through the lower cover plate and extends downward. The experimental device also includes an operating mechanism for driving the dynamic conductive rod to move.

[0026] In this embodiment, a sealing sleeve 19 is connected to the insulating shell, and the movable conductive rod 13 is installed and moved therein. Specifically, the sealing sleeve is sealed and installed on the lower cover plate of the insulating shell. In this embodiment, the sealing sleeve does not mean that the inner cavity of the sealing sleeve is an independent sealed space, but a sealed cavity is formed after being connected with the insulating shell. An insulating block 28 is provided at the end of the movable conductive rod in the sealing sleeve, and a first magnet 29 is provided on the insulating block. The operating mechanism includes a second magnet 20 sleeved on the outer wall of the sealing sleeve for magnetic adsorption with the first magnet. The operating mechanism drives the movable conductive rod to move by driving the second magnet or the second magnetic adsorption block. Specifically, the operating mechanism includes a lead screw 21 rotatably arranged on the device frame and a movable block 22 movably installed on the device frame to guide and stop rotation. The second magnet 20 is arranged on the movable block 22, and the movable block is threadedly connected to the lead screw. The operating mechanism includes a driving motor 23, a driving wheel is arranged on the power output shaft of the driving motor, a driven wheel is arranged on the lead screw 21, and power is transmitted between the driving wheel and the driven wheel through a transmission belt. The driving wheel, the driven wheel and the transmission belt are all arranged in a transmission box 24, and the transmission box plays a protective role. The driving motor drives the lead screw to rotate, and the rotation of the lead screw drives the movable block and the second magnet thereon to move up and down, and then drives the first magnet in the sealing sleeve and the movable conductive rod to move up and down through the magnetic adsorption force.

[0027] In this embodiment, in order to ensure the smooth operation of the moving conductive rod and prevent negative pressure from being generated in the inner cavity of the sealing sleeve during the movement of the insulating block and the first magnet to affect the movement of the moving conductive rod, the inner cavities of the sealing sleeve on both sides of the first magnet are connected to each other for gas to pass through. Specifically, the first magnet or the first magnetic adsorption block is guided and installed in the inner cavity of the sealing sleeve to ensure smooth operation. The first magnet is provided with a through groove connecting the inner cavities of the sealing sleeve on both sides thereof.

[0028] In order to facilitate the outward lead of the electricity on the moving conductive rod, a conductive block 25 for the moving conductive rod to be movably installed is fixed inside the insulating shell, and an electrode 17 is arranged on the insulating shell, and the electrode is connected to the conductive block through a conductive plate 18. A conductive structure is arranged between the conductive block and the moving conductive rod. In this embodiment, a through hole for the moving conductive rod to be movably installed is arranged on the conductive block. The conductive structure includes a mounting hole 26 arranged on the conductive block and connected to the through hole. A spring (not shown in the figure) and a conductive column 27 for always contacting the moving conductive rod for conduction under the action of the spring are arranged in the mounting hole. A bolt can also be arranged in the mounting hole, and the spring is squeezed by the bolt, and the spring squeezes the conductive column. In this embodiment, the conductive column contacts the conductive block for conduction and the conductive column adopts a graphite column, which can smoothly conduct the electricity on the moving conductive rod to the electrode for outward lead. One end of the conductive plate contacts the conductive block for conduction, and the other end is connected to the electrode. The conductive block is installed in the insulating shell through the insulating frame 16, specifically installed on the lower cover plate. In this embodiment, the device frame includes a frame and surrounding side panels. The operating mechanism and the sealing sleeve are both located inside the space surrounded by the side panels. An electrode cable outlet is provided on one of the side panels.

[0029] In the above description of this specification, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in this specification, those skilled in the art can understand the specific meanings of the above terms in this utility model according to the specific circumstances.

[0030] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "up", "down", "front", "back", "left", "right", "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "center", "longitudinal", "lateral", "clockwise" or "counterclockwise", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or position relationship terms cannot be understood or interpreted as limitations on the scheme of the utility model.

[0031] In addition, the terms "first" or "second" used in this specification to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this specification, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0032] In other embodiments of the utility model, the first magnet may not be installed in a guided manner with the inner cavity of the sealing sleeve. In this case, the moving conductive rod may also be installed in a guided and movable manner between the moving conductive rod and the conductive block to ensure the smooth operation of the moving conductive rod. At this time, there is a gap between the first magnet and the inner cavity of the sealing sleeve to achieve mutual communication between the inner cavities of the sealing sleeve on both sides; the first magnet may also be replaced by the first magnetic adsorption block; the second magnet may also be replaced by the second magnetic adsorption block; the through groove may also be replaced by a through hole.

Claims

1. A high-voltage discharge gas arc extinguishing experimental device, comprising an apparatus frame, an insulating shell is arranged on the apparatus frame, an insulating gas inlet and an insulating gas outlet are arranged on the insulating shell, a static conductive rod and a dynamic conductive rod are arranged on the insulating shell, a static contact is arranged at the end of the static conductive rod in the insulating shell, and a dynamic contact is arranged at the end of the dynamic conductive rod; the experimental device also includes an operating mechanism for driving the dynamic conductive rod to move; characterized in that: The insulating shell is connected to a sealing sleeve for the movable conductive rod to be installed therein, an insulating block is arranged at the end of the movable conductive rod in the sealing sleeve, and a first magnet or a first magnetic adsorption block is arranged on the insulating block; the operating mechanism comprises a second magnet or a second magnetic adsorption block which is sleeved on the outer wall of the sealing sleeve and is used for magnetic adsorption with the first magnet or the first magnetic adsorption block, the inner cavities of the sealing sleeve on both sides of the first magnet or the first magnetic adsorption block are connected to each other for gas to pass through, and the operating mechanism drives the movable conductive rod to move by driving the second magnet or the second magnetic adsorption block.

2. The high-voltage discharge gas arc extinguishing experimental device according to claim 1 is characterized in that: There is a gap between the first magnet or the first magnetic adsorption block and the inner cavity of the sealing sleeve, so that the inner cavities of the sealing sleeve on both sides are connected to each other.

3. The high-voltage discharge gas arc extinguishing experimental device according to claim 1 is characterized in that: The first magnet or the first magnetic adsorption block is guided and installed in the inner cavity of the sealing sleeve, and the first magnet or the first magnetic adsorption block is provided with a through groove or a through hole communicating with the inner cavity of the sealing sleeve on both sides thereof.

4. The high-voltage discharge gas arc extinguishing experimental device according to claim 1 is characterized in that: The operating mechanism includes a lead screw rotatably arranged on a device frame and a movable block movably installed on the device frame for guiding and stopping rotation, a second magnet or a second magnetic adsorption block is arranged on the movable block, and the movable block is threadedly connected to the lead screw; the operating mechanism includes a driving motor, a driving wheel is arranged on the power output shaft of the driving motor, a driven wheel is arranged on the lead screw, and power is transmitted between the driving wheel and the driven wheel through teeth or a transmission belt.

5. The high-voltage discharge gas arc extinguishing experimental device according to any one of claims 1 to 4, characterized in that: A conductive block for the movable conductive rod to movably pass through is fixedly arranged inside the insulating shell, an electrode is arranged on the insulating shell, the electrode is connected to the conductive block through a conductive plate, and a conductive structure is arranged between the conductive block and the movable conductive rod.

6. The high-voltage discharge gas arc extinguishing experimental device according to claim 5, characterized in that: The conductive block is provided with a through hole for the movable conductive rod to movably pass through, and the conductive structure includes a mounting hole provided on the conductive block and connected to the through hole, and a spring and a conductive column for always contacting with the movable conductive rod for electrical conduction under the action of the spring are provided in the mounting hole, and the conductive column contacts with the conductive block for electrical conduction.

7. The high-voltage discharge gas arc extinguishing experimental device according to claim 6, characterized in that: The conductive column is a graphite column.

8. The high-voltage discharge gas arc extinguishing experimental device according to claim 1 is characterized in that: The insulating shell is provided with a vacuum port.

9. The high-voltage discharge gas arc extinguishing experimental device according to claim 1, characterized in that: The insulating shell is provided with a connection port for installing a pressure gauge.

10. The high-voltage discharge gas arc extinguishing experimental device according to claim 1, characterized in that: The insulating shell is provided with a pressure relief port for installing a safety valve.

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