Environment-friendly gas arc extinguishing characteristic test device and method

Abstract

The invention belongs to the technical field of environment-friendly gas characteristic test, discloses an environment-friendly gas arc extinguishing characteristic test device and method, and aims to solve the problems of low test efficiency and high cost. The device comprises a gas chamber and a test assembly, the test assembly comprises a gas charging and discharging assembly, an opening and closing assembly and a control assembly used for controlling the opening and closing assembly. The control assembly comprises a driving mechanism used for controlling the movement displacement and speed of the opening and closing assembly and a transmission mechanism used for transmitting power generated by the driving mechanism to the opening and closing assembly. The transmission mechanism comprises an insulating part connected with the driving mechanism and a gear transmission part connected with the opening and closing assembly. In the arc extinguishing characteristic test, the opening and closing speed and time can be linearly changed by adjusting the speed of the servo motor in the control assembly, and the rotating speed and time of the servo motor can be reversely adjusted according to the opening and closing characteristics to achieve an ideal opening and closing state, so that the test efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental gas characteristic testing, and in particular relates to an environmental gas arc extinguishing characteristic testing device and method. Background Art

[0002] Previously, most high-voltage equipment usually used SF6 gas, which has a greenhouse effect. Under the background of promoting the dual carbon goals, the research on environmentally friendly switchgear has become a research hotspot in the high-voltage switchgear industry. The reduction and replacement of SF6 gas is not only an important development direction of my country's power switch industry, but also contains huge market potential. For the research on SF6 alternative gases, in-depth exploration of its arc extinguishing characteristics test is particularly critical. Arc extinguishing characteristics are another important dimension to measure the application efficiency of environmentally friendly gases in power equipment such as circuit breakers. It focuses on the mechanism of gas in the process of arc generation and extinguishing, specifically covering arc extinguishing speed, arc extinguishing ability, and the ability to affect the heat conduction and heat radiation characteristics of the arc. High-quality arc extinguishing characteristics can quickly extinguish the arc and effectively prevent it from damaging power equipment, thereby ensuring the stable operation of the power system.

[0003] Although there are corresponding environmentally friendly gas characteristic test devices available, these devices still have some shortcomings. For example, they cannot efficiently replace the connection between the moving and static end contacts and the corresponding contact seats, and the structure of the test device is relatively fixed, resulting in low overall test efficiency and high cost. Summary of the invention

[0004] Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the objects of the present invention is to at least solve one or more of the above-mentioned problems in the prior art. In other words, one of the objects of the present invention is to provide an environmentally friendly gas arc extinguishing characteristics test device and method that meets one or more of the above-mentioned needs, so as to achieve the purpose of improving test efficiency and reducing test costs.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0006] In the first aspect, the present invention provides an environmentally friendly gas arc extinguishing characteristics test device, comprising a gas chamber and a test component; the test component comprises a gas charging and discharging component, a switch-opening and closing component, and a control component for controlling the switch-opening and closing component; the control component comprises a driving mechanism for controlling the movement displacement and speed of the switch-opening and closing component and a transmission mechanism for transmitting the power generated by the driving mechanism to the switch-opening and closing component; the transmission mechanism comprises an insulating part connected to the driving mechanism and a gear transmission part connected to the switch-opening and closing component.

[0007] As a preferred solution, the test assembly also includes a first threaded connector and a second threaded connector; the air chamber includes a test cavity, which is enclosed by a shell, a cover plate and two pot-type insulators; the opening and closing assembly is connected to one of the pot-type insulators through the first threaded connector; and the opening and closing assembly is connected to the other pot-type insulator through the second threaded connector.

[0008] As a preferred solution, the test assembly also includes a third threaded connector; the opening and closing assembly includes a moving contact, a static contact, a moving end support and a static end support; the moving contact and the moving end support are threadedly connected; the static contact and the static end support are connected through the third threaded connector.

[0009] As a preferred solution, the gear transmission member includes a gear shaft, a rack and a bearing; the bearing and the movable end support are fixedly connected; the gear shaft is connected to the movable end support through the bearing.

[0010] As a preferred solution, the air chamber further includes a pressure stabilizing chamber; the pressure stabilizing chamber is enclosed by a transition cylinder and the pot-type insulator; and the pressure stabilizing chamber is filled with gas.

[0011] As a preferred solution, the gas charging and discharging assembly includes a charging valve and an exhaust valve; the gas charging and discharging assembly also includes a pressure gauge for monitoring the charging pressure of the test chamber and a pressure relief valve for explosion prevention.

[0012] As a preferred solution, it also includes a measuring component for measuring spectrum and / or temperature; the measuring component includes a spectrometer and a spectrum shooting window arranged on the air chamber; the spectrum shooting window is tilted and has an angle of 45° with the axis of the gear shaft.

[0013] As a preferred solution, it also includes an observation component for observing the arc extinguishing test; the observation component includes a camera and a high-speed camera window arranged on the air chamber.

[0014] As a preferred solution, two high-speed camera windows are provided; each of the high-speed camera windows is tilted and has an angle of 45° with the axis of the gear shaft.

[0015] In the second aspect, the present invention provides an environmental gas arc extinguishing characteristics test method, which is based on an environmental gas arc extinguishing characteristics test device described in the first aspect, and includes the following steps: obtaining a preset inflation pressure rated value of a test chamber; an inflation valve fills the test chamber with environmental gas through a shell until the pressure gauge monitors that the inflation pressure of the test chamber reaches the inflation pressure rated value; obtaining a preset rotation speed and rotation time of a servo motor in a drive mechanism to control the movement distance and speed of the moving contact; based on the preset rotation speed and rotation time, the drive mechanism transmits torque through an insulating part to drive the gear shaft and then drives the rack to move along the direction of the line connecting the moving contact and the static contact to obtain the separation and combination characteristics at different speeds, thereby completing the environmental gas arc extinguishing characteristics test; after the test, the exhaust valve discharges the environmental gas after the test.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. A control component is provided. In the arc extinguishing characteristic test, the opening and closing speed and time can be linearly changed by adjusting the speed of the servo motor in the control component, and the speed and time of the servo motor can be reversely adjusted according to the opening and closing characteristics to achieve the ideal opening and closing state, thereby improving the test efficiency.

[0018] 2. The moving contact, the static contact and the corresponding moving contact seat and the static end support are connected by threads, which facilitates the change of the moving and static contact structure types to support environmental protection gas arc extinguishing characteristic tests under different conditions and improves the test efficiency.

[0019] 3. By setting the pressure relief valve, when the shell reaches a dangerous pressure, it can directly release the pressure, thus avoiding damage. Repeated use can reduce test costs and improve test efficiency.

[0020] Further or more detailed beneficial effects will be described in detail in conjunction with specific examples in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the arc extinguishing characteristic test device described in an embodiment of the present invention.

[0023] Figure 2 It is a side view of the arc extinguishing characteristic test device described in an embodiment of the present invention.

[0024] Figure Number:

[0025] 110. test chamber; 111. housing; 112. cover plate; 113. pot-type insulator;

[0026] 120, pressure stabilizing chamber; 121, transition cylinder;

[0027] 210. Gas charging and discharging assembly;

[0028] 211, charging valve; 212, exhaust valve; 213, pressure gauge; 214, pressure relief valve;

[0029] 220, opening and closing components;

[0030] 221, moving contact; 222, static contact; 223, moving end support; 224, static end support;

[0031] 230, control components;

[0032] 231. Driving mechanism;

[0033] 232. Transmission mechanism;

[0034] 2321, insulation parts;

[0035] 2322, gear transmission parts;

[0036] 23221, gear shaft; 23222, rack; 24223, bearing;

[0037] 241, a first threaded connector; 242, a second threaded connector;

[0038] 251, third threaded connector;

[0039] 271, spectrum shooting window;

[0040] 281. High-speed camera window. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with the drawings and specific embodiments of the specification. A person of ordinary skill in the art will be able to implement the present invention based on these descriptions. In addition, the embodiments of the present invention involved in the following description are generally only embodiments of a part of the present invention, not all embodiments. Therefore, based on the embodiments in the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative work should fall within the scope of protection of the present invention. In addition, the orientation or position relationship indicated by the terms "vertical", "horizontal", "front", "rear", etc. mentioned in the embodiments of the present invention is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product is usually placed when used, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be further explained that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like in the description should be understood in a broad sense, for example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Embodiment 1:

[0043] like Figure 1-2 As shown, this embodiment provides an environmentally friendly gas arc extinguishing characteristic test device, including a gas chamber and a test component. The test component includes a gas charging and discharging component 210, a switch-on and switch-off component 220, and a control component 230 for controlling the switch-on and switch-off component 220. Furthermore, the drive of the control component 230 can be achieved by a servo motor. By setting the control component 230, adjusting the speed of the servo motor in the control component 230 in the arc extinguishing characteristic test can efficiently and linearly change the switch-on and switch-off speed and time, and can reversely adjust the speed and time of the servo motor according to the switch-on and switch-off characteristics to achieve an ideal switch-on and switch-off state, thereby improving the test efficiency.

[0044] The gas charging and discharging assembly 210 includes an inflation valve 211 and an exhaust valve 212. The gas charging and discharging assembly 210 also includes a pressure gauge 213 for monitoring the inflation pressure of the test chamber 110 and a pressure relief valve 214 for explosion prevention. In order to prevent excessive pressure in the shell 111, traditional research test equipment generally adopts a destructive bursting disc device as a protective measure. However, the bursting disc often needs to be replaced, which affects the test efficiency and is costly. The pressure relief valve 214 described in this embodiment can directly relieve pressure when a dangerous pressure is reached in the shell 111, which can avoid damage. Repeated use can reduce test costs and improve test efficiency.

[0045] The switch-on and switch-off assembly 220 includes a moving contact 221, a stationary contact 222, a moving end support 223 and a stationary end support 224. The test assembly also includes a third threaded connector 251, wherein the moving contact 221 is threadedly connected to the moving end support 223, and the stationary contact 222 is threadedly connected to the stationary end support 224 through the third threaded connector 251. The moving contact 221 and the moving end support 223 are threadedly connected, which facilitates the change of the moving and stationary contact structure types to support environmental protection gas arc extinguishing characteristic tests under different conditions and improves the test efficiency. The third threaded connector 251 can be implemented by a screw, and the stationary contact 222 is connected to the stationary end support 224 through the third threaded connector 251, which not only simplifies the installation and disassembly process and improves work efficiency, but also ensures the reliability and electrical performance of the connection, providing a strong guarantee for the stable operation of electrical equipment.

[0046] The control assembly 230 includes a driving mechanism 231 for controlling the movement displacement and speed of the opening and closing assembly 220 and a transmission mechanism 232 for transmitting the power generated by the driving mechanism 231 to the opening and closing assembly 220. The transmission mechanism 232 includes an insulating member 2321 connected to the driving mechanism 231 and a gear transmission member 2322 connected to the opening and closing assembly 220. The gear transmission member 2322 includes a gear shaft 23221, a rack 23222 and a bearing 24223. The gear rack 23222 is used for transmission to improve the transmission accuracy. The bearing 24223 is fixedly connected to the movable end support 223; the gear shaft 23221 is connected to the movable end support 223 through the bearing 24223.

[0047] The air chamber includes a test chamber 110, which is surrounded by a shell 111, a cover plate 112 and two pot-type insulators 113. The test assembly also includes a first threaded connector 241 and a second threaded connector 242. The opening and closing assembly 220 is connected to the pot-type insulator 113 through the first threaded connector 241, and the opening and closing assembly 220 is connected to the pot-type insulator 113 through the second threaded connector 242. The air chamber also includes a pressure stabilizing chamber 120, which is surrounded by a transition cylinder 121 and the pot-type insulator 113, and the pressure stabilizing chamber 120 is filled with gas. The transition cylinder 121 is filled with gas at a certain pressure, which can effectively reduce the pressure difference on both sides of the insulating basin and protect the insulating basin and other test devices.

[0048] The connection between the moving end support 223 and the pot-type insulator 113 and the connection between the static end support 224 and the pot-type insulator 113 can be achieved through threaded connectors.

[0049] The test device also includes a measuring component for measuring the spectrum and / or temperature. The measuring component includes a spectrometer (not shown in the drawings) and a spectrum shooting window 271 arranged on the gas chamber, and the spectrum shooting window 271 is tilted and has an angle of 45° with the axis of the gear shaft 23221. The spectrum shooting window 271 is designed to be tilted downward at 45°, and the spectrum and temperature of the arc extinguishing can be monitored by the spectrometer.

[0050] The test device also includes an observation component for observing the arc extinguishing test. The observation component includes a camera (not shown in the attached figure) and a high-speed camera window 281 arranged on the air chamber. Two high-speed camera windows 281 are provided, each of which is tilted and has an angle of 45° with the axis of the gear shaft 23221. The high-speed camera window 281 is arranged vertically from the upper side to observe the dynamic process of the entire arc extinguishing and the ablation of the two contacts from two angles. The spectrum collected by the spectrometer and the video image captured by the camera are transmitted to the PC end through optical fiber through photoelectric isolation. This method of combining temperature measurement with a high-speed camera and a spectrum analyzer can obtain the change law of arc temperature over time, and generate a stable arc by controlling the plate distance through the speed of the servo motor in the driving mechanism 231 and the time, and calibrate the temperature measurement system to obtain the steady-state arc temperature field distribution.

[0051] Embodiment 2:

[0052] The present embodiment provides an environmental gas arc extinguishing characteristic test method, which is based on an environmental gas arc extinguishing characteristic test device described in Example 1, and includes the following steps: presetting the inflation pressure rating of the test chamber 110 when performing the insulation test; the inflation valve 211 fills the test chamber 110 with environmental gas through the shell 111 until the pressure gauge 213 monitors that the inflation pressure of the test chamber 110 reaches the inflation pressure rating; presetting the speed and rotation time of the servo motor in the driving mechanism 231 to control the movement distance and speed of the moving contact 221; based on the preset speed and rotation time, the driving mechanism 231 transmits torque through the insulating member 2321 to drive the gear shaft 23221 and then drives the rack 23222 to move along the connecting line direction of the moving contact 221 and the static contact 222 to obtain the separation and combination characteristics at different speeds, thereby completing the environmental gas arc extinguishing characteristic test; after the test, the exhaust valve 212 discharges the environmental gas after the test.

[0053] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0054] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0055] The above is only an exemplary embodiment of the present disclosure, and the scope of the present disclosure cannot be limited thereto. That is, any equivalent changes and modifications made according to the teachings of the present disclosure are still within the scope of the present disclosure. After considering the specification and practicing the disclosure here, those skilled in the art will easily think of the implementation scheme of the present disclosure. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the technical field not recorded in the present disclosure. The description and examples are regarded as exemplary only, and the scope and spirit of the present disclosure are defined by the claims.

Claims

1. An environmentally friendly gas arc extinguishing characteristics test device, characterized in that: Includes air chamber and test assembly; The test assembly comprises a gas charging and discharging assembly (210), a switch-on and switch-off assembly (220), and a control assembly (230) for controlling the switch-on and switch-off assembly (220); The control component (230) comprises a driving mechanism (231) for controlling the movement displacement and speed of the opening and closing component (220) and a transmission mechanism (232) for transmitting the power generated by the driving mechanism (231) to the opening and closing component (220); The transmission mechanism (232) comprises an insulating member (2321) connected to the driving mechanism (231) and a gear transmission member (2322) connected to the opening and closing assembly (220).

2. The environmental protection gas arc extinguishing characteristic test device according to claim 1, characterized in that: The test assembly further comprises a first threaded connection member (241) and a second threaded connection member (242); The air chamber comprises a test chamber (110), and the test chamber (110) is enclosed by a shell (111), a cover plate (112) and two pot-type insulators (113); The opening and closing assembly (220) is connected to one of the pot-type insulators (113) via the first threaded connector (241); The opening and closing assembly (220) is connected to another pot-type insulator (113) via the second threaded connector (242).

3. The environmental protection gas arc extinguishing characteristic test device according to claim 2, characterized in that: The test assembly also includes a third threaded connector (251); The opening and closing switch assembly (220) comprises a moving contact (221), a stationary contact (222), a moving end support (223) and a stationary end support (224); The moving contact (221) and the moving end support (223) are threadedly connected; The static contact (222) is connected to the static end support (224) via the third threaded connection member (251).

4. The environmentally friendly gas arc extinguishing characteristic test device according to claim 3, characterized in that: The gear transmission member (2322) comprises a gear shaft (23221), a rack (23222) and a bearing (24223); the bearing (24223) and the movable end support (223) are fixedly connected; The gear shaft (23221) is connected to the movable end support (223) via the bearing (24223).

5. The environmentally friendly gas arc extinguishing characteristic test device according to claim 4, characterized in that: The air chamber also includes a pressure stabilizing chamber (120); The voltage stabilizing chamber (120) is enclosed by a transition cylinder (121) and the basin-type insulator (113); The pressure stabilizing chamber (120) is filled with gas.

6. The environmentally friendly gas arc extinguishing characteristic test device according to claim 5, characterized in that: The gas charging and discharging assembly (210) comprises a charging valve (211) and an exhaust valve (212); The gas charging and discharging assembly (210) further comprises a pressure gauge (213) for monitoring the charging pressure of the test chamber (110) and a pressure relief valve (214) for explosion prevention.

7. The environmental protection gas arc extinguishing characteristic test device according to claim 6, characterized in that: Also included are measurement components for measuring light spectrum and / or temperature; The measuring component comprises a spectrometer and a spectrum shooting window (271) arranged on the gas chamber; The spectrum shooting window (271) is tilted and has an angle of 45° with the axis of the gear shaft (23221).

8. The environmentally friendly gas arc extinguishing characteristic test device according to claim 7, characterized in that: Also included is an observation assembly for observing arc extinguishing tests; The observation assembly includes a camera and a high-speed camera window (281) arranged on the air chamber.

9. The environmentally friendly gas arc extinguishing characteristic test device according to claim 8, characterized in that: The high-speed camera windows (281) are provided with two; Each of the high-speed camera windows (281) is tilted and has an angle of 45° with the axis of the gear shaft (23221).

10. A method for testing arc extinguishing characteristics of environmentally friendly gas, characterized in that: An environmentally friendly gas arc extinguishing characteristic test device according to claim 9 comprises the following steps: Obtaining a preset inflation pressure rating of a test chamber (110); The inflation valve (211) fills the test chamber (110) with environmentally friendly gas through the housing (111) until the pressure gauge (213) monitors that the inflation pressure of the test chamber (110) reaches the inflation pressure rated value; Obtaining the rotation speed and rotation time of the servo motor in the preset driving mechanism (231) to control the movement distance and speed of the moving contact (221); Based on the preset rotation speed and rotation time, the driving mechanism (231) transmits torque through the insulating member (2321) to drive the gear shaft (23221) and then drives the rack (23222) to move along the connecting line direction of the moving contact (221) and the stationary contact (222) to obtain the opening and closing characteristics at different speeds, thereby completing the environmental protection gas arc extinguishing characteristic test. Test; After the test is finished, the exhaust valve (212) discharges the post-test environmentally friendly gas.

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