CN213092929U - Sleeve for environment-friendly gas - Google Patents
Sleeve for environment-friendly gas Download PDFInfo
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- CN213092929U CN213092929U CN202021812336.5U CN202021812336U CN213092929U CN 213092929 U CN213092929 U CN 213092929U CN 202021812336 U CN202021812336 U CN 202021812336U CN 213092929 U CN213092929 U CN 213092929U
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Abstract
The utility model provides a sleeve pipe for environment-friendly gas solves current sleeve pipe dielectric strength lower, can't use the problem in the gaseous C-GIS cubical switchboard of environment-friendly in the limited space. A sleeve for environment-friendly gas comprises a conductive hardware fitting and an insulating sleeve wrapped on the outer side of the conductive hardware fitting; one end of the insulating sleeve wrapping the conductive hardware fitting is provided with at least one layer of umbrella-shaped creepage increasing skirt used for increasing creepage distance along the surface from inside to outside along the radial direction; wherein, an increasing climbing groove is formed between the umbrella-shaped increasing climbing skirt at the innermost side and the conductive hardware fitting.
Description
Technical Field
The utility model belongs to medium and high voltage electric power system application, concretely relates to sleeve pipe for environmental protection gas.
Background
At present, the bushing is applied to a C-GIS switch cabinet of 40.5kV (36kV) and below, and the bushing in the switch cabinet is mainly supported by SF6Excellent insulating property of gas and stable and reliable electrical performance. But with the replacement of SF by environment-friendly gas in C-GIS switch cabinet6The continuous exploration of gas, the main environmental protection gas at present is dry air, nitrogen and the like, because the environmental protection gas and SF are used6The insulating property is weak compared with that of gas, so that the original SF6The sleeve used in the gas can not be directly applied to the environment-friendly gas C-GIS switch cabinet with limited space, otherwise, the risk of flashover, creepage and the like can be caused. Therefore, it is necessary to design a bushing with high insulation strength to meet the needs of the industry.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the existing sleeve has low insulating strength and cannot be applied to the environment-friendly gas C-GIS switch cabinet with limited space, and provides a sleeve for environment-friendly gas.
The invention idea of the utility model is that:
to reach the purpose of promoting sleeve pipe dielectric strength, can realize through the insulating thickness who increases itself, corresponding its space that occupies also can increase, but the space of gaseous C-GIS cubical switchboard of environment-friendly is limited, in limited space, will promote the dielectric strength of each sleeve pipe through increasing insulating thickness, and the effect is very little, and the possibility of realizing is also not big. Therefore, the utility model discloses a new sleeve pipe sets up the umbelliform and increases the climbing skirt through the wherein one end at the electrically conductive gold utensil of sleeve pipe insulation cover parcel to form and increase and climb the recess, with increase along the face creepage distance, and then promote sheathed tube dielectric strength, reduce sleeve pipe overall dimension as far as simultaneously, make it satisfy performance and installation environment requirement.
In order to achieve the above object, the present invention provides a technical solution:
a sleeve for environment-friendly gas comprises a conductive hardware (namely a high-voltage electrified body) and an insulating sleeve wrapped on the outer side of the conductive hardware; the conductive metal fitting is characterized in that one end of the conductive metal fitting wrapped by the insulating sleeve is provided with at least one layer of umbrella-shaped creepage increasing skirt used for increasing creepage distance along the surface from inside to outside along the radial direction; wherein, an increasing climbing groove is formed between the umbrella-shaped increasing climbing skirt at the innermost side and the conductive hardware fitting.
Certainly, when the umbrella-shaped climbing skirts have two or more layers, climbing grooves are formed between every two adjacent umbrella-shaped climbing skirts.
Preferably, the end face of the exposed end of the conductive hardware fitting is taken as a reference face, and the direction of the end face pointing to the other end of the insulating sleeve is defined as a forward direction; and the forward distance between the end part of the umbrella-shaped climbing skirt and the end surface is gradually increased from inside to outside along the radial direction, namely the distance between the end part of the umbrella-shaped climbing skirt at the innermost side and the end surface of the exposed end of the conductive hardware fitting is minimum, and the distance between the end part of the umbrella-shaped climbing skirt at the outermost side and the end surface of the exposed end of the conductive hardware fitting is maximum.
Furthermore, an anti-creeping umbrella is arranged outside the insulating sleeve;
the climbing-increasing umbrella is sleeved on the insulating sleeve or is cast and vulcanized with the insulating sleeve into a whole.
Further, the outer surface of the conductive hardware fitting, which is wrapped in the insulating sleeve, is coated with a semiconductive coating; but the exposed surface of the conductive hardware fitting is not allowed to have any semiconductive coating; and the insulating sleeve is made of epoxy resin, and the epoxy casting surface is smooth and free of any phenomena of impurities, air holes, air bubbles, collision and the like. The material of the climbing-increasing umbrella is rubber or epoxy resin.
Preferably, in order to promote dielectric strength, reduce the processing degree of difficulty when reducing inside sleeve pipe size, umbelliform climbing skirt has two-layer, forms two-layer climbing groove.
Preferably, the sleeve is an inner taper sleeve or a side expanding sleeve, such as 1#, 2#, 3#, 4# inner taper sleeves and the like, or a self-designed sleeve conforming to the EN50181 standard or other standards.
Preferably, a plurality of mounting fixing holes are formed in the other end of the insulating sleeve (i.e., the insulating sleeve at the grounding fixing end of the sleeve), the sleeve is mounted on a metal grounding plate of the electrical box of the switch cabinet through the mounting fixing holes, the sleeve is further provided with a high-voltage grading ring and a shielding ring, and the shielding ring is electrically connected with the metal insert in the mounting fixing hole.
Alternatively, the sleeve is preferably an outer cone sleeve, such as A, B, C, D, E, F-type outer cone sleeve or the like, or a self-designed sleeve that conforms to the EN50181 standard or other standards.
Preferably, a plurality of mounting and fixing holes are formed in the insulating sleeve at the grounding end of the outer taper sleeve; the outer taper sleeve is arranged on a metal grounding plate of the switch cabinet electric box through the mounting fixing hole; and the outer taper sleeve is also provided with a shielding ring which is electrically connected with the metal insert in the mounting fixing hole.
The utility model has the advantages that:
1. the utility model discloses the sleeve pipe increases the umbelliform and increases the climbing skirt through wherein one end at insulating cover parcel conductive hardware, makes its edge creepage distance increase, so that promote its dielectric strength, reduce surface electric field, and reduced sheathed tube overall dimension simultaneously, be applicable to more in the limited environment-friendly gas C-GIS cubical switchboard in space, and when this sleeve pipe is connected with other types of electrical insulation spare, satisfy standard EN50181 requirement, electrical insulation can satisfy standard GB/T11022 and GB/T4109 requirement.
2. The utility model discloses still be provided with on the sleeve pipe and increase and climb the umbrella, further increased the creeping distance, promoted holistic dielectric strength.
3. The sleeve pipe of the utility model is more beneficial to the popularization of environment-friendly gas C-GIS switch cabinets and the environment-friendly operation is carried out in corresponding industry calls.
Drawings
Fig. 1 is a schematic structural view of a first embodiment of a bushing according to the present invention;
fig. 2 is an installation schematic view of a first embodiment of the bushing of the present invention;
fig. 3 is a schematic structural view of a second embodiment of the sleeve of the present invention;
fig. 4 is an installation schematic diagram of a second embodiment of the bushing of the present invention;
fig. 5 is a schematic structural view of a third embodiment of the bushing of the present invention;
fig. 6 is an installation schematic diagram of a third embodiment of the bushing of the present invention;
fig. 7 is a schematic structural diagram of a fourth embodiment of the bushing of the present invention;
fig. 8 is an installation schematic diagram of a fourth embodiment of the bushing of the present invention;
fig. 9 is a schematic structural diagram of a fifth embodiment of the bushing of the present invention.
Fig. 10 is an installation schematic diagram of a fifth embodiment of the bushing of the present invention.
The reference numbers are as follows:
1-conductive hardware fitting, 2-insulating sleeve, 3-umbrella-shaped climbing-increasing skirt, 4-climbing-increasing groove, 5-high-voltage grading ring, 6-shielding ring, 7-climbing-increasing surface and 8-mounting fixing hole; 9-metal ground plate.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
example one
As shown in fig. 1, the # 2 inner cone sleeve comprises a conductive fitting 1, an insulating sleeve 2 wrapped outside the conductive fitting 1, and a high voltage grading ring 5 and a shielding ring 6 for improving electric field distribution. Wherein, one end of the insulating sleeve 2 wrapping the conductive hardware fitting 1 is provided with two layers of umbrella-shaped creepage skirts 3 used for increasing creepage distance along the surface from inside to outside along the radial direction, and the first umbrella-shaped creepage skirt 3 and the second umbrella-shaped creepage skirt 3 are respectively arranged from inside to outside along the radial direction; the other end is provided with a plurality of mounting fixing holes 8, and the sleeve can be mounted on a metal grounding plate 9 of the electrical box of the switch cabinet through the mounting fixing holes 8, see fig. 2. Climbing grooves 4 are formed between the first umbrella-shaped climbing skirt 3 and the conductive hardware fitting 1 and between the two umbrella-shaped climbing skirts 3; the distance between the first umbrella-shaped climbing skirt 3 and the exposed end face of the conductive hardware fitting 1 is small, and the distance between the second umbrella-shaped climbing skirt 3 and the exposed end face of the conductive hardware fitting 1 is large; the circumferential surface of the whole insulating sleeve 2, the umbrella-shaped climbing-increasing skirt 3 and the climbing-increasing groove 4 form a climbing-increasing surface 7 together. The high-voltage grading ring 5 and the shielding ring 6 are both made of conductive or semiconductive materials; the high-voltage grading ring 5 is bowl-shaped and is connected with the conductive hardware fitting 1; the cross-section of shield ring 6 is the L type, is close to installation fixed orifices 8 and sets up, is connected with the mold insert electricity of installation fixed orifices 8, and the shield ring also can be used for testing the electricity through with testing electric wire hole fixed connection.
Example two
Fig. 3 and 4 show the structure of the # 3 inner cone sleeve, which is different from the first embodiment in that the structures of the conductive hardware 1 of the # 3 inner cone sleeve and the conductive hardware 1 of the # 2 inner cone sleeve are slightly different, and the shielding ring 6 of the conductive hardware 1 of the # 3 inner cone sleeve is circular.
EXAMPLE III
As shown in fig. 5, the outer-cone C-shaped bushing includes a conductive fitting 1, an insulating sleeve 2 wrapped outside the conductive fitting 1, and a shield ring 6 for improving electric field distribution. Wherein, one end of the insulating sleeve 2 wrapping the conductive hardware fitting 1 is provided with two layers of umbrella-shaped creepage skirts 3 used for increasing creepage distance along the surface from inside to outside along the radial direction, and the first umbrella-shaped creepage skirt 3 and the second umbrella-shaped creepage skirt 3 are respectively arranged from inside to outside along the radial direction; the size of the other end meets the requirement of EN50181, and an umbrella-shaped climbing skirt 3 is not arranged; the middle part is sheathed tube ground connection stiff end, has seted up a plurality of installation fixed orificess 8 on the insulating cover 2 of earthing terminal, and the sleeve pipe is installed on the metal ground plate 9 of cubical switchboard electric box through installation fixed orifices 8, refers to fig. 6, and at this moment, the one end that does not set up umbelliform climbing-increasing skirt 3 is located the electric box outside. Climbing grooves 4 are formed between the first umbrella-shaped climbing skirt 3 and the conductive hardware fitting 1 and between the two umbrella-shaped climbing skirts 3; and the distance between the first umbrella-shaped climbing skirt 3 and the exposed end face of the conductive hardware fitting 1 is small, and the distance between the second umbrella-shaped climbing skirt 3 and the exposed end face of the conductive hardware fitting 1 is large. The shielding ring 6 is made of a conductive or semiconductive material, is arranged close to the installation fixing hole 8 and is electrically connected with the insert of the installation fixing hole 8, and the shielding ring can also be used for testing electricity through being fixedly connected with the electricity testing wire hole.
Example four
The structure of the outer cone F-shaped sleeve is as shown in fig. 7 and 8, and the difference from the third embodiment is that the structure of the conductive fitting 1 of the outer cone F-shaped sleeve is slightly different.
EXAMPLE five
As shown in fig. 9, the side expanding sleeve includes a conductive fitting 1, an insulating sleeve 2 wrapped outside the conductive fitting 1, and a high voltage grading ring 5 and a shielding ring 6 for improving electric field distribution. Wherein, one end of the insulating sleeve 2 wrapping the conductive hardware fitting 1 is provided with two layers of umbrella-shaped creepage skirts 3 used for increasing creepage distance along the surface from inside to outside along the radial direction, and the first umbrella-shaped creepage skirt 3 and the second umbrella-shaped creepage skirt 3 are respectively arranged from inside to outside along the radial direction; the other end is provided with a plurality of mounting fixing holes 8, and the sleeve is mounted on a metal grounding plate 9 of the electrical box of the switch cabinet through the mounting fixing holes 8, as shown in fig. 10. Climbing grooves 4 are formed between the first umbrella-shaped climbing skirt 3 and the conductive hardware fitting 1 and between the two umbrella-shaped climbing skirts 3; the distance between the first umbrella-shaped climbing skirt 3 and the exposed end face of the conductive hardware fitting 1 is small, and the distance between the second umbrella-shaped climbing skirt 3 and the exposed end face of the conductive hardware fitting 1 is large; the circumferential surface of the whole insulating sleeve 2, the umbrella-shaped climbing-increasing skirt 3 and the climbing-increasing groove 4 form a climbing-increasing surface 7 together. The high-voltage grading ring 5 and the shielding ring 6 are both made of conductive or semiconductive materials; the high-voltage grading ring 5 is bowl-shaped and is connected with the conductive hardware fitting 1; the shielding ring 6 is close to the installation fixing hole 8 and is electrically connected with the insert of the installation fixing hole 8, and the shielding ring can also be used for testing electricity by being fixedly connected with an electricity testing wire hole.
The umbrella-shaped climbing skirt 3 in the above embodiments is in a convex ring shape, and the umbrella-shaped climbing skirt 3 is provided with several layers, which are related to factors such as installation space and processing difficulty and can be adjusted in time.
In order to further increase the creepage distance and improve the insulation strength, the outside of the insulating sleeve 2 of the sleeve can be additionally provided with a climbing-increasing umbrella which can be sleeved on the insulating sleeve 2 and can also be cast and vulcanized with the insulating sleeve 2 into a whole, which is not shown in the figure. The insulating sleeve 2 is made of epoxy resin, and the epoxy casting surface is smooth and free of any phenomena of impurities, air holes, air bubbles, collision and the like; the material of the climbing-increasing umbrella is rubber or epoxy resin. The outer surface of the conductive hardware fitting 1, which is wrapped in the insulating sleeve 2, is coated with a semi-conductive coating; but the exposed surface of the conductive fitting 1 is not allowed to have any semiconductive coating.
The utility model discloses according to the performance requirement of 40.5kV cubical switchboard, still carried out the performance test in dry air and nitrogen gas, test item and requirement as follows:
1. electrical property test:
a. power frequency withstand voltage: 95kV/2 min;
b. lightning impulse tolerance test: 200kV +/-10 times;
c. partial discharge amount test: the power frequency voltage is less than or equal to 5pc under 45 kV.
2. Bending mechanical strength test:
bearing 8kN, the phenomena of peeling, separation or damage can not occur, and the electrical insulating property is not influenced.
3. Sealing test:
and carrying out qualitative leak detection on the sealing surface and the metal piece pouring position.
4. High and low temperature cold and hot impact cycle test:
a. cooling to-50 deg.C at 20 deg.C (taking 6 hours);
b. -50 ℃ warming to 20 ℃ (taking 6 hours);
c. heating to 120 ℃ at 20 ℃ (taking 6 hours);
d. after cooling to 20 ℃ at 120 ℃ (taking 6 hours), a-d were cycled 10 times and then tested for electrical performance as per item 1.
5. And (3) test results: meets the performance requirement.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the protection scope of the present invention.
Claims (10)
1. A sleeve for environment-friendly gas comprises a conductive hardware (1) and an insulating sleeve (2) wrapped on the outer side of the conductive hardware (1); the method is characterized in that:
one end of the insulating sleeve (2) wrapping the conductive hardware (1) is provided with at least one layer of umbrella-shaped creepage increasing skirt (3) used for increasing creepage distance along the surface from inside to outside along the radial direction;
wherein, a climbing groove (4) is formed between the umbrella-shaped climbing skirt (3) at the innermost side and the conductive hardware (1).
2. The cannula according to claim 1, wherein:
when the umbrella-shaped climbing skirts (3) have two or more layers, climbing grooves (4) are formed between every two adjacent umbrella-shaped climbing skirts (3).
3. The bushing of claim 2 wherein:
the end face of the exposed end of the conductive hardware (1) is used as a reference surface, and the direction of the end face pointing to the other end of the insulating sleeve (2) is defined as a forward direction;
the positive distance between the end part of the umbrella-shaped climbing skirt (3) and the end surface is gradually increased from inside to outside along the radial direction.
4. The bushing of claim 3 wherein:
the outside of the insulating sleeve (2) is also provided with a climbing-increasing umbrella;
the climbing-increasing umbrella is sleeved on the insulating sleeve (2) or is cast and vulcanized with the insulating sleeve (2) into a whole.
5. The bushing of claim 4 wherein: the outer surface of the conductive hardware (1) wrapped in the insulating sleeve (2) is coated with a semi-conductive coating.
6. The cannula according to claim 5, wherein:
the umbrella-shaped climbing-increasing skirt (3) is provided with two layers to form two layers of climbing-increasing grooves (4).
7. The cannula according to any of claims 1-6, wherein: the sleeve is an inner taper sleeve or a side expanding sleeve.
8. The cannula according to claim 7, wherein: the other end of the insulating sleeve (2) is provided with a plurality of mounting and fixing holes (8); the sleeve is further provided with a high-voltage equalizing ring (5) and a shielding ring (6), and the shielding ring (6) is electrically connected with the metal insert in the mounting and fixing hole (8).
9. The cannula according to any of claims 1-6, wherein: the sleeve is an outer taper sleeve.
10. The cannula according to claim 9, wherein: a plurality of mounting and fixing holes (8) are formed in the insulating sleeve (2) at the ground end of the outer taper sleeve; and the outer taper sleeve is also provided with a shielding ring (6) which is electrically connected with the metal insert in the mounting fixing hole (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021812336.5U CN213092929U (en) | 2020-08-26 | 2020-08-26 | Sleeve for environment-friendly gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021812336.5U CN213092929U (en) | 2020-08-26 | 2020-08-26 | Sleeve for environment-friendly gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213092929U true CN213092929U (en) | 2021-04-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021812336.5U Active CN213092929U (en) | 2020-08-26 | 2020-08-26 | Sleeve for environment-friendly gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213092929U (en) |
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2020
- 2020-08-26 CN CN202021812336.5U patent/CN213092929U/en active Active
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