Device and method for testing insulation characteristic of environment-friendly gas

Abstract

The invention belongs to the technical field of environment-friendly gas characteristic test, discloses an environment-friendly gas insulation characteristic test device and method, and aims to solve the problems of low efficiency, poor safety and high cost. The device comprises a gas chamber, a test assembly and an observation assembly, the air chamber comprises a test cavity and a pressure stabilizing cavity; the test assembly comprises a gas charging and discharging assembly and an opening and closing assembly. The test assembly further comprises a pressure relief assembly and a control assembly used for controlling the opening and closing assembly. Driving of the control assembly can be achieved through the servo motor, rotary motion output by the servo motor is converted into left-right motion of the moving contact, the opening distance between the moving contact and the static contact can be linearly controlled by adjusting the speed and the operation time of the servo motor, the situation that the opening distance is manually adjusted in a traditional test is optimized, and the test efficiency is improved. More groups of tests with different opening distances can be performed under the test conditions of different pressures and different gas types, and the test accuracy and efficiency are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of environmental protection gas characteristic test, and specifically relates to an environmental protection gas insulation characteristic test device and method. Background Art

[0002] Most high-voltage equipment uses SF6 gas, which has a greenhouse effect. However, under the background of the dual carbon goals, the research on environmentally friendly switchgear has become the focus of the high-voltage switch industry. At present, the reduction and replacement of SF6 gas has become an important development direction of my country's power switch industry, with huge market potential. The insulation properties of environmentally friendly gases, as the key to whether they can effectively replace traditional insulating gases (such as SF6), have attracted much attention. The insulation properties mainly focus on the performance of the gas in the electric field, including breakdown voltage, insulation strength and long-term operation stability. High insulation strength and good stability are crucial to ensure the safe operation of the power system, and can effectively prevent failures caused by insulation failure.

[0003] Although there are test devices for studying the characteristics of environmentally friendly gas insulation, their structural design is insufficient. During the test, the opening distance needs to be adjusted manually, resulting in low test efficiency and limited accuracy. In addition, there is a large pressure difference between the front and back sides of the insulating basin and the center insert in the test device, and the inflation pressure needs to be adjusted frequently to conduct insulation tests under different conditions. In this process, destructive bursting discs are usually relied on for pressure release, and there is a lack of efficient pressure relief devices. Therefore, the overall test efficiency is low and the cost is high. At the same time, safety is also affected, with obvious disadvantages such as low efficiency, poor safety, 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 insulation 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, improving test safety and reducing 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 insulation characteristics test device, including a gas chamber, a test component and an observation component; the gas chamber includes a test cavity and a pressure-stabilizing cavity; the test component includes a gas charging and discharging component and a switch-opening and closing component; the test component also includes a pressure relief component and a control component for controlling the switch-opening and closing component.

[0007] As a preferred solution, the test cavity is enclosed by a shell, a cover plate and two pot-type insulators; the voltage-stabilizing cavity is enclosed by a transition cylinder and two pot-type insulators; the pot-type insulator includes a convex surface, and the convex surface faces the test cavity.

[0008] As a preferred solution, the gas charging and discharging assembly includes an inflation valve, an exhaust valve and a pressure gauge for monitoring the inflation pressure of the test chamber; and the pressure relief assembly is provided with a pressure relief valve.

[0009] As a preferred solution, the control component includes a driving mechanism for controlling the movement displacement and speed of the opening and closing component and a transmission mechanism for transmitting the power generated by the driving mechanism to the opening and closing component; the transmission mechanism includes an insulating part connected to the driving component and a gear transmission part connected to the opening and closing component.

[0010] As a preferred solution, the test assembly also includes a first threaded connector and a second threaded connector; the opening and closing assembly is connected to one of the pot-type insulators via the first threaded connector; and the opening and closing assembly is connected to another of the pot-type insulators via the second threaded connector.

[0011] As a preferred solution, the opening and closing assembly includes a moving contact, a static contact, a moving end support and a static end support; the moving contact is threadedly connected to the moving end support; the static contact is threadedly connected to the static end support.

[0012] As a preferred solution, the gear transmission assembly 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.

[0013] As a preferred solution, the observation component 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.

[0014] As a preferred solution, the observation component also includes an observation component for observing insulation tests; the observation component includes a camera and a high-speed camera window arranged on the air chamber; 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 environmentally friendly gas insulation characteristics test method, which is based on an environmentally friendly gas insulation 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 environmentally friendly gas through a shell until the pressure gauge monitors that the inflation pressure of the test chamber reaches the inflation pressure rated value; obtaining the speed and rotation time of a servo motor in a preset drive mechanism to control the movement distance and speed of the moving contact; based on the preset 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 environmentally friendly gas insulation characteristics test; after the test, the exhaust valve discharges the environmentally friendly gas after the test.

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

[0017] 1. The control component can be driven by a servo motor. The rotational motion output by the servo motor is converted into the left and right motion of the moving contact. Adjusting the speed and running time of the servo motor can linearly control the opening distance between the moving contact and the static contact, thereby optimizing the situation of manually adjusting the opening distance in traditional tests, and realizing more groups of tests with different opening distances under test conditions of different pressures and different gas types, thereby improving the accuracy and efficiency of the test.

[0018] 2. By providing the pressure stabilizing chamber and filling it with gas, the pressure difference on both sides of the insulating basin can be effectively reduced, thereby protecting the test device and improving stability.

[0019] 3. The pot-type insulator includes a convex surface, which faces the test cavity and can withstand greater pressure in structure, thereby increasing the stability of the test device.

[0020] 4. A pressure relief valve is provided to effectively prevent excessive pressure in the shell during the test, thereby improving the efficiency of the test and being able to be used multiple times to save test costs.

[0021] 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

[0022] 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.

[0023] Figure 1It is a structural schematic diagram of the insulation characteristics testing device described in an embodiment of the present invention.

[0024] Figure 2 It is a side view of the insulation characteristics testing device described in an embodiment of the present invention.

[0025] Figure 3 It is a schematic diagram of the matching types of the moving and static end electrode structures described in an embodiment of the present invention, wherein a is a needle-plate electrode type, b is a ball-plate electrode type, and c is a plate-plate electrode type.

[0026] Figure Number:

[0027] 110, test chamber; 111, housing; 112, cover plate; 113, pot-type insulator; 1131, convex surface;

[0028] 120, pressure stabilizing chamber; 121, transition cylinder;

[0029] 210. Gas charging and discharging assembly;

[0030] 211, charging valve; 212, exhaust valve; 213, pressure gauge;

[0031] 220, opening and closing components;

[0032] 221, moving contact; 222, stationary contact; 223, moving end support; 224, stationary end support;

[0033] 231. Pressure relief valve;

[0034] 240, control components;

[0035] 241. Driving mechanism;

[0036] 242. Transmission mechanism;

[0037] 2421, insulation parts;

[0038] 2422, gear transmission parts; 24221, gear shaft; 24222, rack; 24223, bearing;

[0039] 251, first threaded connector;

[0040] 311, spectrum shooting window;

[0041] 321. High-speed camera window. DETAILED DESCRIPTION

[0042] The present invention is further described below in conjunction with the drawings and specific embodiments of the specification. A person skilled 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 skilled 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 in use, 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.

[0043] Embodiment 1:

[0044] like Figure 1-2 As shown, this embodiment provides an environmentally friendly gas insulation characteristics test device, including a gas chamber, a test component and an observation component.

[0045] The air chamber includes a test chamber 110 and a pressure-stabilizing chamber 120. The test chamber 110 is enclosed by a shell 111, a cover plate 112 and two pot-type insulators 113, and the pressure-stabilizing chamber 120 is enclosed by a transition cylinder 121 and two pot-type insulators 113. 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 pot, thereby protecting the test device. The pot-type insulator 113 includes a convex surface 1131, which faces the test chamber 110 and can withstand greater pressure in structure, thereby increasing the stability of the test device.

[0046] The test assembly includes a gas charging and discharging assembly 210, a switch-on and switch-off assembly 220, a pressure relief assembly, and a control assembly 240 for controlling the switch-on and switch-off assembly 220. 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. Furthermore, the driving of the control assembly 240 can be realized by a servo motor, and the rotational motion output by the servo motor is converted into the left and right motion of the moving contact 221. Adjusting the speed and running time of the servo motor can linearly control the opening distance between the moving contact 221 and the stationary contact 222, which optimizes the situation of manually adjusting the opening distance in traditional tests, realizes that more groups of tests with different opening distances can be performed under test conditions of different pressures and different gas types, and improves the accuracy and efficiency of the test.

[0047] The gas charging and discharging assembly 210 includes an inflating valve 211, an exhaust valve 212, and a pressure gauge 213 for monitoring the inflation pressure of the test chamber 110. The pressure relief assembly is provided with a pressure relief valve 231, which can effectively prevent the pressure in the housing 111 from being too high during the test, optimizes the traditional protection device using a disposable bursting disc, improves the efficiency of the test, and can be used multiple times to save the test cost.

[0048] The control assembly 240 includes a driving mechanism 241 for controlling the movement displacement and speed of the opening and closing assembly 220 and a transmission mechanism 242 for transmitting the power generated by the driving mechanism 241 to the opening and closing assembly 220. The transmission mechanism 242 includes an insulating member 2421 connected to the driving assembly and a gear transmission member 2422 connected to the opening and closing assembly 220.

[0049] The test assembly also includes a first threaded connector 251 and a second threaded connector (not shown in the figure). The opening and closing assembly 220 is connected to one of the pot-type insulators 113 via the first threaded connector 251, and the opening and closing assembly 220 is connected to another of the pot-type insulators 113 via the second threaded connector (not shown in the figure).

[0050] The moving contact 221 is threadedly connected to the moving end support 223; the stationary contact 222 is threadedly connected to the stationary end support 224. The moving contact 221 and the stationary contact 222 are respectively connected to the moving end support 223 and the stationary end support 224 by threaded connection. The use of threaded connection can efficiently replace the tip electrode, ball head electrode, and plate electrode of the moving end plate and the stationary end. The matching type of the moving and stationary end electrode structure is as follows Figure 3 As shown, a is a needle-plate electrode type, b is a ball-plate electrode type, and c is a plate-plate electrode type. The contact and the contact seat are connected by threads, and the contact is easy to replace, which can improve the richness and efficiency of the test.

[0051] 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.

[0052] The gear transmission assembly includes a gear shaft 24221, a rack 24222 and a bearing 24223. The gear rack 24222 is used to improve the transmission accuracy. The bearing 24223 is fixedly connected to the movable end support 223; the gear shaft 24221 is connected to the movable end support 223 through the bearing 24223.

[0053] The observation component includes a measuring component for measuring spectrum and / or temperature, and the measuring component includes a spectrometer and a spectrum shooting window 311 arranged on the gas chamber. The spectrum shooting window 311 is tilted and has an angle of 45° with the axis of the gear shaft 24221.

[0054] The observation assembly also includes an observation assembly for observing the insulation test, and the observation assembly includes a camera and a high-speed camera window 321 arranged on the air chamber; two high-speed camera windows 321 are provided, and each of the high-speed camera windows 321 is tilted and has an angle of 45° with the axis of the gear shaft 24221. Furthermore, the high-speed camera window 321 can be designed in an elliptical shape, so that the observation range is larger, and the test conditions at different opening distances can be clearly seen. The high-speed camera window 321 is arranged vertically, and a high-speed camera is used to observe the dynamic process of the entire insulation test from two angles, which is convenient for studying the insulation breakdown of the two contacts.

[0055] Embodiment 2:

[0056] The present embodiment provides an environmentally friendly gas insulation characteristics test method, which is based on an environmentally friendly gas insulation characteristics test device described in Example 1, and includes the following steps: obtaining a preset inflation pressure rating of the test chamber 110; the inflation valve 211 fills the test chamber 110 with environmentally friendly 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; obtaining the speed and rotation time of the servo motor in the preset drive mechanism 241 to control the movement distance and speed of the moving contact 221; based on the preset speed and rotation time, the drive mechanism 241 transmits torque through the insulating member 2421 to drive the gear shaft 24221 and then drives the rack 24222 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 environmentally friendly gas insulation characteristics test; after the test, the exhaust valve 212 discharges the environmentally friendly gas after the test.

[0057] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0058] 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.

[0059] 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. The present invention is intended to cover any variation, use or adaptive change 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 insulation properties test device, characterized in that: It includes an air chamber, a test assembly and an observation assembly; The air chamber comprises a test chamber (110) and a pressure stabilization chamber (120); The test assembly comprises a gas charging and discharging assembly (210) and a switch-on and switch-off assembly (220); The test assembly further comprises a pressure relief assembly and a control assembly (240) for controlling the opening and closing assembly (220).

2. The environmentally friendly gas insulation characteristics test device according to claim 1, characterized in that: The test chamber (110) is enclosed by a housing (111), a cover plate (112) and two pot-type insulators (113); The voltage stabilizing chamber (120) is enclosed by a transition cylinder (121) and two pot-type insulators (113); The pot-type insulator (113) comprises a convex surface (1131), and the convex surface (1131) faces the test cavity (110).

3. The environmentally friendly gas insulation characteristics test device according to claim 2, characterized in that: The gas charging and discharging assembly (210) comprises a charging valve (211), an exhaust valve (212), and a pressure gauge (213) for monitoring the charging pressure of the test chamber (110); The pressure relief component is provided with a pressure relief valve (231).

4. The environmentally friendly gas insulation characteristics test device according to claim 3, characterized in that: The control component (240) comprises a driving mechanism (241) for controlling the movement displacement and speed of the opening and closing component (220) and a transmission mechanism (242) for transmitting the power generated by the driving mechanism (241) to the opening and closing component (220); The transmission mechanism (242) comprises an insulating member (2421) connected to the driving assembly and a gear transmission member (2422) connected to the opening and closing assembly (220).

5. The environmentally friendly gas insulation characteristics test device according to claim 4, characterized in that: The test assembly further comprises a first threaded connection member (251) and a second threaded connection member; The opening and closing assembly (220) is connected to one of the pot-type insulators (113) via the first threaded connector (251); The opening and closing assembly (220) is connected to another pot-type insulator (113) via the second threaded connector.

6. The environmentally friendly gas insulation characteristics test device according to claim 5, characterized in that: 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) and the static end support (224) are threadedly connected.

7. The environmentally friendly gas insulation characteristics test device according to claim 6, characterized in that: The gear transmission assembly includes a gear shaft (24221), a rack (24222) and a bearing (24223); The bearing (24223) and the movable end support (223) are fixedly connected; The gear shaft (24221) is connected to the movable end support (223) via the bearing (24223).

8. The environmentally friendly gas insulation property test device according to claim 7, characterized in that: The observation component includes a measurement component for measuring spectrum and / or temperature; The measuring component comprises a spectrometer and a spectrum shooting window (311) arranged on the gas chamber; The spectrum shooting window (311) is tilted and has an angle of 45° with the axis of the gear shaft (24221).

9. The environmentally friendly gas insulation characteristics test device according to claim 8, characterized in that: The observation assembly also includes an observation assembly for observing insulation testing; The observation assembly includes a camera and a high-speed camera window (321) arranged on the air chamber; The high-speed camera windows (321) are provided with two; Each of the high-speed camera windows (321) is tilted and has an angle of 45° with the axis of the gear shaft (24221).

10. A method for testing the insulation properties of an environmentally friendly gas, characterized in that: An environmentally friendly gas insulation property 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 (241) to control the movement distance and speed of the moving contact (221); Based on the preset rotation speed and rotation time, the driving mechanism (241) transmits torque through the insulating member (2421) to drive the gear shaft (24221) and then drives the rack (24222) 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 insulation characteristics test; After the test is finished, the exhaust valve (212) discharges the post-test environmentally friendly gas.

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