CN110957663B - Ternary mixed gas insulated switchgear with smell perception function - Google Patents

Ternary mixed gas insulated switchgear with smell perception function Download PDF

Info

Publication number
CN110957663B
CN110957663B CN201911214288.1A CN201911214288A CN110957663B CN 110957663 B CN110957663 B CN 110957663B CN 201911214288 A CN201911214288 A CN 201911214288A CN 110957663 B CN110957663 B CN 110957663B
Authority
CN
China
Prior art keywords
gas
warning
sealed container
moving contact
container
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201911214288.1A
Other languages
Chinese (zh)
Other versions
CN110957663A (en
Inventor
张国强
赵义焜
李康
韩冬
邱宗甲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Institute of Electrical Engineering of CAS
Original Assignee
Institute of Electrical Engineering of CAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Institute of Electrical Engineering of CAS filed Critical Institute of Electrical Engineering of CAS
Priority to CN201911214288.1A priority Critical patent/CN110957663B/en
Publication of CN110957663A publication Critical patent/CN110957663A/en
Application granted granted Critical
Publication of CN110957663B publication Critical patent/CN110957663B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/025—Safety arrangements, e.g. in case of excessive pressure or fire due to electrical defect
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/045—Details of casing, e.g. gas tightness
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/055—Features relating to the gas
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
    • H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
    • H02B13/035—Gas-insulated switchgear
    • H02B13/065—Means for detecting or reacting to mechanical or electrical defects

Abstract

The gas insulated switchgear is a sealed container (1) which is packaged with ternary mixed gas (2). The ternary mixed gas (2) consists of warning gas and mixed insulating gas. The warning gas is characterized by being colorless, non-toxic, stable in chemical property and strong in pungent smell. The type and the mixing ratio of the mixed insulating gas can be reasonably selected according to practical application scenes, and C is recommended but not limited to be adopted4F7N/CO2And (4) mixing the gases. The sealed container (1) is a container for ternary mixed gas (2). A fixed spring (5), a vacuum bulb (6), a spring operating rod (4), a moving contact (8) and a moving contact operating rod (7) are arranged in the sealed container (1) and used for current switch control, and a warning gas volatilization container (11) is further arranged and used for storing and volatilizing gas/liquid/solid volatile matters.

Description

Ternary mixed gas insulated switchgear with smell perception function
Technical Field
The present invention relates to a gas insulated switchgear, and more particularly, to a gas insulated switchgear using a ternary mixed gas as an insulating medium.
Background
SF6The gas has good insulating property, arc extinguishing capability and chemical stability, so that the gas is widely applied to gas-insulated power transmission and transformation equipment. However, pure SF6The gas is very sensitive to the nonuniformity of the electric field, and has higher requirement on the processing precision of the power transmission and transformation equipment. At the same time, SF6Products of electric discharge decomposition of gases, e.g. SO2F2、SOF2、SOF4、SF2、SF4And the like all belong to highly toxic substances, and once leakage occurs, the health of people is greatly threatened. Furthermore, pure SF6Gas is a type of asphyxiating gas that humans inhale in amounts that can cause asphyxiating disability or death. In addition, the greenhouse effect of the SF6 gas is extremely large, with a Global Warming Potential (GWP) of about CO223900 times ofAnd SF6The survival life in the atmosphere is about 3200 years, and SF is recorded in the Kyoto protocol book signed in 1997 by the convention of climate Change of the United nations6The gas is listed as one of six limiting greenhouse gases. Thus, SF is currently available6The application of the substitute gas in insulating equipment becomes a research hotspot at home and abroad.
Related studies in recent years have shown that SF is replaced by a single gas6Gases are very difficult and therefore there have been attempts by researchers to use mixed gases instead of pure SF6A gas. SF has been used6/N2Or SF6/CO2Mixed gas replacing pure SF6Report of gas, this scheme compared to pure SF6The gas insulation scheme has the remarkable advantages of reducing the liquefaction temperature of the gas, reducing the sensitivity to the surface defects of the electrode, reducing the manufacturing cost and the like. However, with SF6The solution of mixed gas as insulating medium cannot fundamentally solve the problem of SF6The greenhouse effect problem of the gas and the harm to the human health caused by the virulent substances contained in the discharge decomposition products still become problems to be solved urgently.
Patent JP2004236459A and patent JP2006014411A propose the use of C-C4F8(octafluorocyclobutane) C3F8And N2、CO2And the mixed gas is used as an insulating and arc extinguishing medium for electrical equipment. Patent JP4119441B2 proposes the use of N2Or O2Or CO2Or dry air as main insulating gas component, and mixing with C-C with content less than 20%4F8、CF3SF5、C3F8Or CF3OSF3Etc. as an insulating medium for insulating the device.
With the development of chemical technology, the 3M company in the United states developed an environment-friendly gas insulation medium, namely C, with great application potential4F7N (perfluoroisobutyronitrile) as a replacement for the strong greenhouse gas SF6. The general electric company applies it to a gas insulated enclosed switchgear (GIS) of 145 kV; great britain install and adopt C4F7N/CO2Gas insulated transmission line (GIL) of 420kV with a mixed gas as the insulating medium, proving C4F7N/CO2The mixed environment-friendly gas has great engineering application value in gas-insulated electrical equipment.
The environment-friendly insulating gas is adopted to replace SF6The gas scheme can greatly reduce the global warming coefficient of the insulating gas and simultaneously solve the problem of SF6The toxic substances contained in the gas decomposition products can cause harm to human bodies. However, since the above-mentioned eco-gas contains elements such as C, O, F, N, there is a possibility that molecules of the eco-gas are decomposed to generate C under the action of an arc generated when a current is cut off or a fault such as partial discharge or overheating occurs in the interior of high-voltage electrical equipment3F6、CNCN、CF3CN and other toxic substances. Since most decomposition products are colorless and odorless, they also cause slow damage to human health in the event of prolonged leakage. Meanwhile, the leakage of the gas insulation medium can also cause the pressure of gas inside the gas insulation equipment to be reduced and the insulation level to be greatly reduced, so that insulation faults such as breakdown, surface flashover and the like are caused. In order to solve the problems, the portable gas inspection equipment cannot realize the online monitoring of the gas insulation power transmission and transformation equipment, and the ultraviolet, infrared spectrum and other leak detection methods have the defects of high cost, single type of detected gas and the like.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides ternary mixed gas insulated switchgear with an olfactory perception function, or leakage warning function. The invention can effectively reduce the global warming coefficient of the gas insulation medium used by the switch equipment, can detect the leakage fault of the gas insulation switch equipment in time, and can not influence the internal insulation performance and the normal operation of the gas insulation switch equipment.
The gas insulated switchgear of the invention is a sealed container which is packaged with ternary mixed gas, and the ternary mixed gas is used as an insulating medium. The ternary mixed gas consists of warning gas and mixed insulating gas. The leakage warning function is realized by the volatilization of warning gasAnd (5) realizing. The warning gas is characterized by being colorless, nontoxic, stable in chemical property and strong in pungent smell. When the gas insulated switchgear has a leakage fault, the warning gas is rapidly diffused to the outside of the sealed container and can be timely sensed by workers, and the time interval from the occurrence of the leakage fault to the discovery of the leakage is shortened as much as possible by matching with the original inspection equipment and method. The warning gas is generated by liquid or solid volatile substances, and the volatile substances are recommended to be but not limited to ethanethiol (CH)3CH2SH), controlling the using amount of ethanethiol liquid volatile matters according to the actual volume of the sealed container, so that the concentration range of ethanethiol in the ternary mixed gas is 0.00019 mg/L-0.0005 mg/L, and the garlic odor can be timely detected when the leakage fault occurs. The ethanethiol volatile substance can be replaced by other volatile substances which have strong volatility and can generate nontoxic and irritant odor gas according to the actual application scene.
The ternary mixed gas consists of the warning gas and the mixed insulating gas or consists of the warning gas and the pure insulating gas. The mixed insulating gas is prepared by mixing 4-30% of insulating gas and 70-96% of buffer gas, and the mixed insulating gas is recommended to be but not limited to C4F7N/CO2And (4) mixing the gases. According to the specific application scenario, C4F7The N insulating gas may be composed of C3F8、c-C4F8、C5F10O、CF3I or SF6Replacement; CO 22The buffer gas may be composed of N2、CF4Air or inert gas. The ternary mixed gas effectively reduces the greenhouse effect on the basis of ensuring high insulating property.
The application scene of the ternary mixed gas is not limited to gas insulated switchgear, and the ternary mixed gas can also be applied to leakage fault detection of gas insulated power transmission and transformation equipment such as gas insulated transformers and gas insulated pipeline buses.
The sealed container is gas insulated switchgear and represents one of application scenarios of ternary mixed gas. The sealed container is internally provided with a fixed spring, a vacuum bubble, a spring operating rod, a moving contact operating rod and a static contact, is used for on-off control of current, and is also provided with a warning gas volatilization container. The spring operating rod is connected with the upper tail end of the fixed spring, and the lower tail end of the fixed spring is connected with the upper electrode inside the vacuum bubble; one end of the moving contact is connected with a lower electrode of the vacuum bulb, a middle rotating shaft of the moving contact is connected with an operating rod of the moving contact, the other end of the moving contact is connected with a static contact, and the static contact is directly grounded; the warning gas volatilization container is fixed on the inner wall of the sealed container, and the vertical position of the warning gas volatilization container is positioned between the movable contact and the wire outlet terminal. The liquid volatile matter is sealed in the warning gas volatilization container, and can be quickly volatilized at normal temperature to generate the warning gas which is colorless, non-toxic and has strong pungent smell. And after the sealed container is vacuumized and filled with the mixed insulating gas, adjusting an external knob of the warning gas volatilization container to enable the warning gas to be quickly volatilized and to be fully mixed with the mixed insulating gas to form ternary mixed gas.
The switch control of the current in the sealed container is mainly completed by matching of a moving contact operating rod, a vacuum bubble, a fixed spring and other components. The high-voltage wire inlet sleeve is fixed on the sealed container, and current flows to the vacuum bubble through the high-voltage wire inlet sleeve. A pair of electrodes is installed in the vacuum bubble, the upper electrode is connected with a high-voltage wire inlet sleeve and is a current path, and the lower electrode is connected with one end of the moving contact. On the outside of the sealed container, the fixed spring can be stretched by controlling the spring operating rod, so that the contact condition between the upper electrode and the lower electrode in the vacuum bulb is controlled, namely connection or disconnection, and the connection or disconnection of current from the high-voltage wire inlet sleeve to the moving contact is realized; the position of the moving contact is changed by controlling the moving contact operating rod outside the sealed container, and when the moving contact is in a vertical position, current can be transmitted to the outlet terminal by the vacuum bulb; when the moving contact is in a horizontal position, the current cannot flow to the outgoing line terminal, and the outgoing line terminal and the fixed contact are connected together through the moving contact and are simultaneously grounded.
The warning gas volatilization container consists of a sealing block, an external knob, a connecting rod, a sealing rubber ring, a baffle, liquid volatile matters and a gas diffusion plate. The cylindrical sealing block is fixed on the wall of the sealing container, the connecting rod penetrates through the sealing block from the central axis of the sealing block, one end of the connecting rod is welded with the external knob, the other end of the connecting rod is connected with the baffle, the baffle is positioned between the wall of the warning gas volatilization container and the sealing block, and the liquid volatile matter is stored right above the baffle in the gas volatilization container; the double-layer sealing rubber ring is embedded in the groove on the inner surface of the sealing block, and the sealing block and the connecting rod clamp the sealing rubber ring inside and outside, so that good air tightness is ensured. After all the components in the sealed container are installed, vacuumizing the sealed container, injecting environment-friendly insulating gas into the sealed container, rotating the external knob to enable the baffle to rotate, enabling the liquid volatile matter to flow into the position right below the gas diffusion plate, and fully mixing warning gas volatilized by the liquid volatile matter and mixed insulating gas into ternary mixed gas, so that the gas insulated switchgear can normally operate. In addition, the ternary mixing process of the insulating gas and the warning gas can be completed in advance before the gas is injected into the sealed container, so that the method for adding the warning gas volatilization container is replaced. The preparation schemes of the two ternary mixed gases can be reasonably selected according to the specific conditions of the internal insulation distance of the gas insulated switchgear, the operation complexity of the ternary mixing process and the like.
The working principle and the process of the device are as follows:
after the assembly of the components is completed, the sealed container is vacuumized, and then the mixed insulating gas with a proper mixing ratio is injected into the sealed container. The outer knob of the warning gas volatilization container is rotated by a certain angle from the horizontal position, so that the baffle is changed from the horizontal closed state to the inclined state, the liquid volatile matter immediately flows to the position under the gas diffusion plate, and after a certain time, the warning gas is completely volatilized and is fully mixed with the mixed insulating gas to form ternary mixed gas. When the gas insulation equipment normally operates, current flows to the vacuum bubble through the high-voltage inlet bushing and then flows to the outlet terminal through the moving contact; the fixed spring can be contracted by controlling the spring operating rod outside the sealed container, so that the contact of an upper electrode and a lower electrode inside the vacuum bubble is cut off; the movable contact operating rod can be controlled to carry out turn-off operation, the position of the movable contact is changed from a vertical position to a horizontal position, and the outgoing line terminal and the static contact are connected together through the movable contact and are simultaneously grounded. In the operation process of the gas insulation equipment, once leakage fault occurs, the warning gas with pungent smell can be leaked along with the insulation medium and quickly diffused into the surrounding air; the warning gas with extremely low concentration can be detected by staff, and then corresponding measures can be rapidly taken to eliminate the fault.
The invention adopts the mixed insulating gas as the insulating medium of the gas insulated switchgear, thereby greatly reducing the greenhouse effect and the harm of gas leakage to the human health. Meanwhile, the leakage fault of the gas insulated switchgear can be timely detected by workers due to the addition of the warning gas, and the time interval from the occurrence of the leakage fault to the discovery of the leakage is greatly shortened by matching with the original inspection equipment and method, so that the normal and stable operation of the gas insulated switchgear and the personal safety of the workers are guaranteed.
The application scene of the ternary mixed gas provided by the invention is not limited to gas insulated switchgear, and can also be applied to leakage fault detection of gas insulated power transmission and transformation equipment such as a Gas Insulated Transformer (GIT), a gas insulated pipeline bus (GIL) and the like, and the ternary mixed gas has a very wide engineering application prospect.
Drawings
Fig. 1 is a partial sectional view of a gas insulated switchgear, in which: the gas alarm device comprises a sealed container 1, a ternary mixed gas 2, a high-voltage wire inlet sleeve 3, a spring operating rod 4, a fixed spring 5, a vacuum bubble 6, a moving contact operating rod 7, a moving contact 8, a fixed contact 9, a wire outlet terminal 10 and a warning gas volatilization container 11;
fig. 2 is a schematic structural diagram of a warning gas volatilization container, wherein: 12 sealing blocks, 13 external knobs, 14 connecting rods, 15 sealing rubber rings, 16 baffles and 17 liquid volatile matters;
FIG. 3 is a schematic view of the operation of the liquid volatile baffle in cooperation with an external knob;
FIGS. 4a and 4b are schematic structural views of an air dispersing device, wherein FIG. 4a is a sectional view and FIG. 4b is a plan view; in the figure: 18 air diffuser plate.
Detailed Description
The invention is further described below with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the gas insulated switchgear of this embodiment includes a sealed container 1, a ternary mixed gas 2, a high-voltage incoming line bushing 3, a spring operating rod 4, a fixed spring 5, a vacuum bulb 6, a moving contact operating rod 7, a moving contact 8, a static contact 9, an outgoing line terminal 10, and a warning gas volatilization container 11. The ternary mixed gas 2 is filled in the sealed container 1, the high-pressure wire inlet sleeve 3 is fixed on the wall of the sealed container 1, the high-pressure wire inlet sleeve 3 is connected with the middle position of a fixed spring 5, a spring operating rod 4 is connected with the upper tail end of the fixed spring 5, and the lower tail end of the fixed spring 5 is connected with an upper electrode in the vacuum bulb 6; one end of the moving contact 8 is connected with a lower electrode of the vacuum bulb 6, a middle rotating shaft of the moving contact 8 is connected with a moving contact operating rod 7, the other end of the moving contact 8 is connected with a static contact 9, and the static contact 9 is directly grounded; the warning gas volatilization container 11 is fixed on the inner wall of the sealed container 1, and the vertical position of the warning gas volatilization container 11 is positioned between the movable contact 8 and the outlet terminal 10. The current flows to the vacuum bubble 6 through the high-voltage wire inlet sleeve 3, and the fixed spring 5 can stretch out and draw back by controlling the spring operating rod 4 outside the sealed container 1, so that the connection or disconnection of the internal electrode of the vacuum bubble 6 is controlled; the position of the movable contact 8 is changed by controlling the movable contact operating rod 7 outside the sealed container 1, and when the movable contact 8 is in a vertical position, current can be transmitted to the outlet terminal 10 by the vacuum bulb 6; when the movable contact 8 is in a horizontal position, the current cannot flow to the outlet terminal 10, and at the moment, the outlet terminal 10 and the fixed contact 9 are connected together by the movable contact 8 and are simultaneously grounded.
Fig. 2 is a schematic structural view of the warning gas volatilization container 11. As shown in fig. 2, the warning gas volatilization container 11 is composed of a sealing block 12, an external knob 13, a connecting rod 14, a sealing rubber ring 15, a baffle 16, liquid volatile 17 and a gas diffusion plate 18. The cylindrical sealing block 12 is fixed on the wall of the sealing container 1, the connecting rod 14 penetrates through the sealing block 12 from the central axis position of the sealing block 12, one end of the connecting rod 14 is welded with the external knob 13, the other end of the connecting rod 14 is connected with the baffle 16, the baffle 16 is positioned between the wall of the warning gas volatilization container 11 and the sealing block 12, and the liquid volatile matter 17 is stored right above the baffle 16; the double-layer sealing rubber ring 15 is embedded in a groove on the inner surface of the sealing block 12, the sealing block 12 and the connecting rod 14 clamp the sealing rubber ring 15 inside and outside, and good air tightness is guaranteed. After all the components in the sealed container 1 are installed, vacuumizing the sealed container 1, injecting mixed insulating gas with a proper mixing ratio into the sealed container 1, rotating the external knob 13 to rotate the baffle 16, allowing the liquid volatile matter 17 to flow into the lower part of the air dispersing hole 18, and allowing the warning gas volatilized by the liquid volatile matter 17 and the mixed insulating gas to be fully mixed into the ternary mixed gas 2, so that the gas insulated switchgear can normally operate. In addition, the ternary mixing process of the insulating gas and the warning gas can also be completed before the gas is injected into the sealed container 1, so as to replace the method of installing the warning gas volatilization container 11. The two schemes can be reasonably selected according to the specific conditions of the internal insulation structure of the gas insulated switchgear, the operation complexity of the ternary mixing process and the like.
Fig. 3 shows a schematic diagram of the operation of the stop plate 16 in cooperation with an external knob. When the external knob 13 is left in position a, as shown in fig. 3, the baffle 16 inside the sealed container 1 is in a horizontal position, and the liquid volatile 17 cannot flow under the air dispersion plate 18; when the external knob 13 is adjusted to the b position, the shutter 16 is rotated, and the liquid volatile 17 flows along the inner wall of the warning gas volatilization vessel 11 to just below the air diffuser 18.
Fig. 4a and 4b show a schematic structural view of the diffuser plate 18. As shown in fig. 4a, the air diffuser 18 is located on one side of the wall of the warning gas volatilization container 11, the vertical position of the air diffuser 18 is between the baffle 16 and the bottom of the warning gas volatilization container 11, and when the liquid volatile 17 flows from the position right above the baffle 16 to the bottom of the warning gas volatilization container 11, the air diffuser 18 will be located right above the liquid volatile 17. As shown in fig. 4b, the gas diffusion plate is uniformly distributed with gas holes, when the liquid volatile 17 flows to the right below the gas diffusion plate 18, the liquid volatile 17 starts to volatilize, the warning gas generated by volatilization rapidly diffuses into the closed container 1 through the gas holes uniformly distributed on the gas diffusion plate 18 and is fully mixed with the mixed insulating gas, and finally the ternary mixed gas 2 is formed.
The working process of the device of the invention is as follows:
after the assembly components are installed, vacuumizing the sealed container, and injecting mixed insulating gas with a proper mixing ratio into the sealed container; the outer knob of the warning gas volatilization container is rotated by a certain angle from the horizontal position, so that the baffle is changed from the horizontal closed state to the inclined state, the liquid volatile matter immediately flows to the position under the gas diffusion plate, and after a certain time, the warning gas is completely volatilized and is fully mixed with the mixed insulating gas to form ternary mixed gas. When the gas insulation equipment normally operates, current flows to the vacuum bubble through the high-voltage inlet bushing and then flows to the outlet terminal through the moving contact; the fixed spring can be contracted by controlling the spring operating rod outside the sealed container, so that the contact of an upper electrode and a lower electrode inside the vacuum bubble is cut off; the movable contact operating rod can be controlled to carry out turn-off operation, the position of the movable contact is changed from a vertical position to a horizontal position, and the outgoing line terminal and the static contact are connected together through the movable contact and are simultaneously grounded. In the operation process of the gas insulation equipment, once leakage fault occurs, the warning gas with pungent smell can be leaked along with the insulation medium and quickly diffused into the surrounding air; the warning gas with extremely low concentration can be detected by staff, and then corresponding measures can be rapidly taken to eliminate the fault.
The invention adopts the mixed insulating gas as the insulating medium of the gas insulated switchgear, thereby greatly reducing the greenhouse effect and the harm of gas leakage to the human health. Meanwhile, the leakage fault of the gas insulated switchgear can be timely detected by workers due to the addition of the warning gas, and the time interval from the occurrence of the leakage fault to the discovery of the leakage is greatly shortened by matching with the original inspection equipment and method, so that the normal and stable operation of the gas insulated switchgear and the personal safety of the workers are guaranteed. Meanwhile, the ethanethiol (CH) recommended by the invention3CH2SH) solutionThe volatile matter can be replaced by other solid volatile matters which have strong volatility and can generate nontoxic and pungent odor gas, and warning gas can be prepared outside the gas insulation equipment in advance and mixed with mixed insulation gas to form ternary mixed gas.
The application scene of the ternary mixed gas provided by the invention is not limited to gas insulated switchgear, and can also be applied to insulation and leakage fault detection of gas insulated power transmission and transformation equipment such as a Gas Insulated Transformer (GIT), a gas insulated pipeline bus (GIL) and the like, and the ternary mixed gas has a very wide engineering application prospect.

Claims (4)

1. A ternary mixed gas insulated switchgear with olfaction perception function, the said insulated switchgear is a sealed container (1); the sealed container (1) is internally provided with a fixed spring (5), a vacuum bulb (6), a spring operating rod (4), a moving contact (8), a moving contact operating rod (7) and a static contact (9) for on-off control of current; the device is also provided with a warning gas volatilization container (11), a high-voltage wire inlet sleeve (3) is fixed on the wall of the sealed container (1), the high-voltage wire inlet sleeve (3) is connected with the middle position of a fixed spring (5), a spring operating rod (4) is connected with the upper tail end of the fixed spring (5), and the lower tail end of the fixed spring is connected with an upper electrode inside a vacuum bulb (6); one end of the moving contact (8) is connected with a lower electrode of the vacuum bulb (6), a middle rotating shaft of the moving contact (8) is connected with the moving contact operating rod (7), the other end of the moving contact (8) is connected with a static contact (9), and the static contact (9) is grounded; warning gas volatilizees on container (11) is fixed in the inner wall of seal container (1), and the vertical position of warning gas volatilizees the container and is located between moving contact (8) and the terminal that goes out, its characterized in that:
the sealed container (1) is filled with ternary mixed gas (2), and the ternary mixed gas (2) consists of warning gas and mixed insulating gas or consists of the warning gas and pure insulating gas; the mixed insulating gas is formed by mixing 4-30% of insulating gas and 70-96% of buffer gas; the warning gas is generated by liquid volatile (17);
the warning gas volatilization container (11) consists of a sealing block (12), an external knob (13), a connecting rod (14), a sealing rubber ring (15), a baffle plate (16), liquid volatile matters (17) and a gas diffusion plate (18); the external knob (13) and the connecting rod (14) are welded into a whole, and the connecting rod (14) penetrates through a sealing block (12) fixed on the wall of the sealed container (1) and is connected with the baffle (16); the sealing rubber ring (15) is double-layer and is embedded in the groove on the inner surface of the sealing block (12); the sealing rubber ring (15) is clamped inside and outside by the sealing block (12) and the connecting rod (14), so that good air tightness between the connecting rod (14) and the sealing block (12) is ensured; the sealed container (1) is filled with environment-friendly insulating gas, the baffle (16) is rotated by rotating the external knob (13), the liquid volatile substance (17) flows to the position right below the gas diffusion plate (18), and when warning gas volatilized by the liquid volatile substance (17) and mixed insulating gas are fully mixed into ternary mixed gas (2), the gas insulated switchgear can normally operate; when the gas insulation equipment normally operates, current flows to the vacuum bubble (6) through the high-voltage wire inlet sleeve and then flows to the wire outlet terminal through the movable contact (8); the fixed spring (5) is contracted by controlling the spring operating rod (4) outside the sealed container (1), and then the contact between an upper electrode and a lower electrode in the vacuum bubble (6) is cut off; or the moving contact operating rod (7) is controlled to carry out turn-off operation, the position of the moving contact (8) is changed from a vertical position to a horizontal position, and the outgoing line terminal and the static contact are connected together by the moving contact (8) and are simultaneously grounded; in the operation process of the gas insulation equipment, once a leakage fault occurs, the warning gas with pungent smell leaks together with the insulation medium and rapidly diffuses into the ambient air to be perceived by workers, and then corresponding measures are rapidly taken to remove the fault;
the ternary mixing process of the mixed insulating gas and the warning gas is completed inside the sealed container (1), or the preparation of the ternary mixed gas (2) is completed outside the sealed container before the gas is injected into the sealed container.
2. Gas-insulated switchgear device according to claim 1, characterized in that: the volatile adopts ethanethiol (CH)3CH2SH), the concentration range of the ethanethiol in the ternary mixed gas (2) is 0.00019 mg/L-0.0005 mg/L.
3. Gas-insulated switchgear device according to claim 1, characterized in that: the insulating gas is C4F7N、C3F8、c-C4F8、C5F10O、CF3I or SF6(ii) a The buffer gas is CO2、N2、CF4Air or an inert gas.
4. A gas-insulated switchgear device as claimed in claim 1, 2 or 3, characterized in that: the ternary mixed gas (2) is used for a Gas Insulated Transformer (GIT) or a gas insulated pipeline bus (GIL).
CN201911214288.1A 2019-12-02 2019-12-02 Ternary mixed gas insulated switchgear with smell perception function Active CN110957663B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911214288.1A CN110957663B (en) 2019-12-02 2019-12-02 Ternary mixed gas insulated switchgear with smell perception function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911214288.1A CN110957663B (en) 2019-12-02 2019-12-02 Ternary mixed gas insulated switchgear with smell perception function

Publications (2)

Publication Number Publication Date
CN110957663A CN110957663A (en) 2020-04-03
CN110957663B true CN110957663B (en) 2021-07-02

Family

ID=69979348

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911214288.1A Active CN110957663B (en) 2019-12-02 2019-12-02 Ternary mixed gas insulated switchgear with smell perception function

Country Status (1)

Country Link
CN (1) CN110957663B (en)

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4237591B2 (en) * 2003-09-17 2009-03-11 株式会社日立製作所 Gas insulated switchgear
CN101208508A (en) * 2004-03-04 2008-06-25 泛特宁有限责任公司 Fuel vapor systems for internal combustion engines
US7985333B2 (en) * 2004-10-13 2011-07-26 Marathon Oil Canada Corporation System and method of separating bitumen from tar sands
DE202011111052U1 (en) * 2010-10-29 2018-11-21 Thermo Fisher Scientific Oy Automated system for sample preparation and analysis
CN203218781U (en) * 2013-02-01 2013-09-25 中国科学院电工研究所 Gas insulation vacuum arc extinguishing switch equipment using a plurality of gases
CN103151216B (en) * 2013-02-01 2015-04-29 中国科学院电工研究所 Fluorocarbon mixed gas insulation arc extinction switching device provided with external absorption device
CN103277284B (en) * 2013-06-21 2016-06-22 苏州盟通利机电设备有限公司 Fully automatic vacuum air extractor and control method thereof
CN204026126U (en) * 2014-05-29 2014-12-17 刘舜 A kind of explosion-proof gas tank
CN104329571A (en) * 2014-11-22 2015-02-04 辽宁天泽产业集团机械制造有限公司 Alarm device for gas or liquid leakage
CN207021580U (en) * 2017-04-24 2018-02-16 江苏大全长江电器股份有限公司 One kind is without bin static contact non-SF 6 gas insulative switchgear
CN207280691U (en) * 2017-09-01 2018-04-27 云南电网有限责任公司电力科学研究院 A kind of refrigeration background board of detection gas leakage
CN108933003B (en) * 2018-07-19 2024-02-27 河北环亚线缆有限公司 Ultrahigh-voltage insulating gas pipeline cable
CN209266998U (en) * 2018-12-27 2019-08-16 新宜能电气科技有限公司 A kind of indoor Cubicle Gas-Insulated Switchgear

Also Published As

Publication number Publication date
CN110957663A (en) 2020-04-03

Similar Documents

Publication Publication Date Title
KR101329503B1 (en) Gas insulation apparatus
CN101047077B (en) Gas insulated switchgear
Kieffel et al. Green gas to replace SF6 in electrical grids
CN102047365B (en) Gas insulation switch
US9510493B2 (en) Mixture of hydrofluoroolefin and fluoroketone for use as an insulation and/or ARC extinguishing medium and a gas insulated medium-voltage electrical device comprising same
RU2601422C2 (en) Use of mixture comprising hydrofluoroolefin as medium-voltage arc-extinguishing and/or insulating gas and medium-voltage electrical device comprising same
CN110957663B (en) Ternary mixed gas insulated switchgear with smell perception function
CN103151216B (en) Fluorocarbon mixed gas insulation arc extinction switching device provided with external absorption device
US2733316A (en) browne
KR102458208B1 (en) Insulation media for electrical energy transmission devices
CN203218781U (en) Gas insulation vacuum arc extinguishing switch equipment using a plurality of gases
CN206498131U (en) Ring main unit filled with halogenated hydrocarbons insulating gas
CN109298293B (en) Gas decomposition characteristic quantity for representing arc extinguishing and insulating capability of novel power equipment
CN103094860B (en) Based on the fluorine carbon Mixed gas insulation switching device of Carbon deposition suppression technology
CN216411465U (en) Test device for simulating fault gas in electrical equipment
US20220166198A1 (en) Gas insulation apparatus
Liu et al. Mathematical model of influence of oxygen and moisture on feature concentration ratios of SF 6 Decomposition Products
EP3171382A1 (en) A gas insulated electric apparatus and a method for producing a gas insulated electric apparatus
JP2001286017A (en) Switch
CN113945816A (en) Test device for simulating fault gas in electrical equipment and control method thereof
JP2019068010A (en) On-load tap changer
CN213581229U (en) Mixed gas simulated discharge device
JP2009261111A (en) Switchgear
CN109904780A (en) Fluorine carbon Mixed gas insulation switching device based on Carbon deposition suppression technology
JP2000166034A (en) Gas insulated switchgear

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant