CN219164066U - Mixed gas bus for combined electrical appliance - Google Patents
Mixed gas bus for combined electrical appliance Download PDFInfo
- Publication number
- CN219164066U CN219164066U CN202223532178.XU CN202223532178U CN219164066U CN 219164066 U CN219164066 U CN 219164066U CN 202223532178 U CN202223532178 U CN 202223532178U CN 219164066 U CN219164066 U CN 219164066U
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- CN
- China
- Prior art keywords
- contact
- conductor
- mixed gas
- shell
- electrical appliance
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- 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.)
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- 239000004020 conductor Substances 0.000 claims abstract description 44
- 239000012212 insulator Substances 0.000 claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims description 5
- 239000007789 gas Substances 0.000 description 34
- 230000015556 catabolic process Effects 0.000 description 6
- 229910018503 SF6 Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 3
- 229960000909 sulfur hexafluoride Drugs 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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- Gas-Insulated Switchgears (AREA)
Abstract
A mixed gas bus for a combined electrical appliance comprises a shell, wherein a corrugated pipe is arranged outside the shell, insulators are arranged at two ends of the shell, a sealed cavity structure is formed inside the shell and the insulators, contacts are arranged on opposite insulators at two opposite sides respectively, and a conductor is arranged between the opposite contacts; the outside of the contact is of a bowl-shaped structure with an opening in the direction of the conductor, the bowl bottom is connected with the insulator, the inner cross section of the contact is of a two-layer ladder shape, a rubber pad is bonded, and the opening direction of the contact is of a large diameter; the conductor is inserted into the contact, and the limit position of the conductor end part is in the contactA step part; an annular contact finger structure is arranged at the contact position between the inner side of the contact and the outer side of the conductor; the sealing cavity structure is SF 6 And N 2 Is provided. Through the structure, the utility model provides the bus device which is environment-friendly, simple in structure and good in safety coefficient.
Description
Technical Field
The utility model relates to the technical field of high-voltage electrical equipment, in particular to a mixed gas bus.
Background
The bus bar for a combined electric appliance is an electric power transmission device. The product occupies small area and small space, and is suitable for 3-phase 50Hz power systems, and is mainly used for substations, thermal power plants, hydropower plants and unattended substations.
The interior of a bus for a traditional combined electrical appliance is filled with sulfur hexafluoride gas, and the global warming potential GWP of the sulfur hexafluoride gas serving as a greenhouse gas is 23900 times that of carbon dioxide, so that the environment protection is not facilitated. After replacing or mixing the gas, the requirements of insulation performance, temperature rising performance, mechanical performance and the like of the bus bar for the gas-insulated metal-enclosed switchgear are ensured, so that no good solution is provided.
Disclosure of Invention
Aiming at the problems, the utility model provides a mixed gas bus for a combined electrical appliance, which comprises a shell, wherein a corrugated pipe is arranged outside the shell, insulators are arranged at two ends of the shell, a sealed cavity structure is formed inside the shell and the insulators, contacts are respectively arranged on opposite insulators at two opposite sides, and a conductor is arranged between the opposite contacts; the outside of the contact is of a bowl-shaped structure with an opening in the direction of the conductor, the bowl bottom is connected with the insulator, the inner cross section of the contact is of a two-layer ladder shape, a rubber pad is bonded, and the opening direction of the contact is of a large diameter; conductor insertionIn the contact, the limit position of the conductor end part is the step inside the contact; an annular contact finger structure is arranged at the contact position between the inner side of the contact and the outer side of the conductor; the sealing cavity structure is SF 6 And N 2 Is provided. Through the structure, the utility model solves the technical problems of poor gas environment-friendly performance, low insulating performance, serious structure contact heating and unstable safety performance in the prior art.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a mixed gas bus for a combined electrical appliance is characterized in that: the device comprises a shell, wherein a corrugated pipe is arranged outside the shell, insulators are arranged at two ends of the shell, a sealing cavity structure is formed inside the shell and the insulators, contacts are respectively arranged on opposite insulators at two opposite sides in a relative measuring way, and a conductor is arranged between the opposite contacts; the outside of the contact is of a bowl-shaped structure with an opening in the direction of the conductor, the bowl bottom is connected with the insulator, the inner cross section of the contact is of a two-layer ladder shape, a rubber pad is bonded, and the opening direction of the contact is of a large diameter; the conductor is inserted into the contact, and the limit position of the end part of the conductor is the step inside the contact; an annular contact finger structure is arranged at the contact position between the inner side of the contact and the outer side of the conductor; the sealing cavity structure is SF 6 And N 2 Is provided.
The conductors are three groups to form three conductors, and two ends of each conductor are connected with the insulator through the contact.
The inner side of the contact is provided with a groove for installing the contact finger, and the contact finger structure is installed inside the groove to compress and position the outer side of the conductor.
The difference between the inner diameter and the outer diameter of the annular contact finger structure in a natural state is larger than the depth of the groove; the difference between the inner diameter and the outer diameter of the annular contact finger structure in the conductor insertion state is equal to the depth of the groove.
The annular contact finger structure is a watchband contact finger or a spring contact finger.
The contact is characterized in that the inner side of the contact is provided with a stepped structure at the opening end, and a rubber pad is adhered to the contact.
The contact and the insulator are installed through bolts.
And the insulator is installed with the shell through bolts, and the installation part is outwards disbursed and provided with a sealing groove.
The shell is provided with a mixed gas density relay.
The beneficial effects of the utility model are as follows:
through the structure, the utility model provides the mixed gas bus for the combined electric appliance, and the bus device for the gas-insulated metal-enclosed switchgear filled with the mixed gas can meet various performance requirements of the bus and has high environmental protection. Due to N 2 The gas price is low, thus compared with the traditional pure SF 6 Compared with the gas bus, the environment-friendly mixed gas bus has considerable economic benefit. Meanwhile, the bus device is simple in structure, good in safety performance and universal, and can be widely applied to bus devices with various voltage levels.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model.
Fig. 2 a-2 b are schematic diagrams of the mated state between a conductor and a contact.
FIG. 3 shows different SF 6 Content and SF 6 /N 2 The breakdown strength of the mixed gas.
Fig. 4 is a schematic structural view of a bellows assembly.
Fig. 5 is a schematic diagram of the K direction of fig. 1.
Detailed Description
A mixed gas bus for a combined electrical appliance comprises a shell 4, wherein a corrugated pipe 10 is arranged outside the shell 4, insulators 5 are arranged at two ends of the shell 4, a sealed cavity structure is formed inside the shell 4 and the insulators 5, contacts 1 are arranged on the insulators 5 opposite to each other at two sides, and a conductor 2 is arranged between the opposite contacts 1; the outside of the contact 1 is of a bowl-shaped structure which is opened towards the direction of the conductor 2, the bowl bottom is connected with the insulator 5, the inner cross section of the contact 1 is of a two-layer ladder shape and is adhered with the rubber pad 9, and the opening direction of the contact is of a large diameter; the conductor 2 is inserted into the contact 1, and the extreme position of the end part of the conductor 2 is the internal step of the contact 1; an annular contact finger structure is arranged at the contact position between the inner side of the contact 1 and the outer side of the conductor 2; the sealing cavity structure is SF 6 And N 2 Is provided.
The conductors 2 are three groups to form three conductors, and two ends of each conductor are connected with the insulator 5 through the contact 1.
The shell 4 is provided with a mixed gas density relay 11.
The inner side of the contact 1 is provided with a stepped structure at the opening end, and a rubber pad 9 is adhered to the stepped part to prevent metal scraps generated by colliding with the contact during installation and disassembly of the conductor.
Specifically, the environment-friendly mixed gas 3 is formed by SF 6 And N 2 The bus can be formed according to a certain proportion, and can be 2:8 or 3:7, so that the requirement of environmental protection performance can be met, and the requirements of various performances of the bus can be met. The environment-friendly mixed gas 3 can be respectively filled into the buses according to the proportion, or the two gases are directly filled into the buses after being mixed by adopting special air filling equipment according to the proportion.
FIG. 3 shows different SF 6 Content and SF 6 /N 2 The breakdown strength of the mixed gas. Wherein line 1: reach and reach pure SF 6 SF at the same pressure of gas 6 /N 2 The magnitude of the decrease in field strength of the mixed gas; curve 2: SF when reaching the same breakdown strength 6 /N 2 The total gas pressure that the mixed gas needs to reach. SF (sulfur hexafluoride) 6 /N 2 Mixed gas in SF 6 In the case of a small gas content, the total pressure of the mixed gas needs to be increased in order to maintain the original surge voltage withstand strength. It can be seen from FIG. 3 that even SF 6 /N 2 SF in mixed gas 6 The content is only 20 percent, and the breakdown strength of the SF reaches the same gas pressure 6 About 70% of the total gas, so that the breakdown strength of the mixed gas is maintained to be equal to that of pure SF 6 The breakdown strength of the gas and the total pressure of the gas can meet the requirement of bus performance only by properly improving the total pressure.
The inner side of the contact 1 is provided with a groove for installing a contact finger, and the contact finger structure is installed inside the groove to compress and position the outer side of the conductor 2. The difference between the inner diameter and the outer diameter of the annular contact finger structure in a natural state is larger than the depth of the groove; the difference between the inner diameter and the outer diameter of the annular contact finger structure in the inserted state of the conductor 2 is equal to the depth of the groove. When the device is used, the applied pressure can be positioned, the contact area between the conductor and the contact 1 is not reduced, and the safety performance is ensured.
The annular contact finger structure is a watchband contact finger 6 or a spring contact finger 7. When the bus device is particularly used, a plurality of grooves can be formed in the inner side of one contact 1, a plurality of or a plurality of annular contact finger structures are matched, and the number of the contact fingers is selected according to the through flow of the bus device.
The contact 1 and the insulator 5 are mounted through bolts. And the insulator 5 and the shell 4 are installed through bolts, and the installation part is outwards disbursed and provided with a sealing groove 8. After installation, the insulator 5 and the shell 4 are formed, the middle part is a cylinder, and the diameters of the two ends of the insulator are gradually reduced and the insulator is an outward protruding integral structure. The shell 4 is made of aluminum or steel, and the insulator 5 is formed by casting epoxy resin and filler according to a proportion and is used for connecting and fixing conductors in the bus device.
Claims (9)
1. A mixed gas bus for a combined electrical appliance is characterized in that: the device comprises a shell (4), wherein a corrugated pipe (10) is arranged outside the shell (4), insulators (5) are arranged at two ends of the shell (4), a sealing cavity structure is formed inside the shell (4) and the insulators (5), contacts (1) are respectively arranged on opposite insulators (5) at two opposite sides, and a conductor (2) is arranged between the opposite contacts (1); the outside of the contact (1) is of a bowl-shaped structure with an opening in the direction of the conductor (2), the bowl bottom is connected with the insulator (5), the inner cross section of the contact (1) is of a two-layer ladder shape, a rubber pad (9) is bonded, and the opening direction of the contact is of a large diameter; the conductor (2) is inserted into the contact (1), and the limit position of the end part of the conductor (2) is the internal step of the contact (1); an annular contact finger structure is arranged at the contact position between the inner side of the contact (1) and the outer side of the conductor (2); the sealing cavity structure is SF 6 And N 2 Is provided.
2. The mixed gas bus for a combined electrical appliance according to claim 1, wherein: the conductors (2) are three groups to form three conductors, and two ends of each conductor are connected with the insulator (5) through the contact (1).
3. The mixed gas bus for a combined electrical appliance according to claim 1, wherein: the inner side of the contact (1) is provided with a groove for installing a contact finger, the contact finger structure is installed inside the groove, and the outer side of the conductor (2) is pressed and positioned.
4. The mixed gas bus for a combined electrical appliance according to claim 2, wherein: the difference between the inner diameter and the outer diameter of the annular contact finger structure in a natural state is larger than the depth of the groove; the difference between the inner diameter and the outer diameter of the annular contact finger structure in the inserted state of the conductor (2) is equal to the depth of the groove.
5. A mixed gas bus for a combined electrical appliance according to claim 3, wherein: the annular contact finger structure is a watchband contact finger (6) or a spring contact finger (7).
6. The mixed gas bus for a combined electrical appliance according to claim 5, wherein: the inner side of the contact (1) is provided with a ladder structure at the opening end, and a rubber pad (9) is adhered to the contact.
7. The mixed gas bus for a combined electrical appliance according to claim 1, wherein: the contact (1) and the insulator (5) are mounted through bolts.
8. The mixed gas bus for a combined electrical appliance according to claim 1, wherein: and a sealing groove (8) is arranged between the insulator (5) and the shell (4) and is outwards disbursed at the installation position through bolts.
9. The mixed gas bus for a combined electrical appliance according to claim 1, wherein: the shell (4) is provided with a mixed gas density relay (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223532178.XU CN219164066U (en) | 2022-12-29 | 2022-12-29 | Mixed gas bus for combined electrical appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223532178.XU CN219164066U (en) | 2022-12-29 | 2022-12-29 | Mixed gas bus for combined electrical appliance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219164066U true CN219164066U (en) | 2023-06-09 |
Family
ID=86644740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223532178.XU Active CN219164066U (en) | 2022-12-29 | 2022-12-29 | Mixed gas bus for combined electrical appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219164066U (en) |
-
2022
- 2022-12-29 CN CN202223532178.XU patent/CN219164066U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20231024 Granted publication date: 20230609 |
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| PP01 | Preservation of patent right | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20240117 Granted publication date: 20230609 |
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| PD01 | Discharge of preservation of patent |