CN109786047B - Hollow composite insulator and circuit breaker - Google Patents
Hollow composite insulator and circuit breaker Download PDFInfo
- Publication number
- CN109786047B CN109786047B CN201811643234.2A CN201811643234A CN109786047B CN 109786047 B CN109786047 B CN 109786047B CN 201811643234 A CN201811643234 A CN 201811643234A CN 109786047 B CN109786047 B CN 109786047B
- Authority
- CN
- China
- Prior art keywords
- liner
- lining
- composite
- composite insulator
- hollow composite
- 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
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 112
- 239000012212 insulator Substances 0.000 title claims abstract description 47
- 230000004323 axial length Effects 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 abstract description 13
- 230000007797 corrosion Effects 0.000 abstract description 13
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000004760 aramid Substances 0.000 description 2
- 229920003235 aromatic polyamide Polymers 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910018503 SF6 Inorganic materials 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Insulators (AREA)
Abstract
The invention relates to a hollow composite insulator and a circuit breaker. A hollow composite insulator comprising a liner in a cylindrical shape, wherein the wall thickness of the middle section of the liner is greater than the thickness of the end region of the liner along the axial direction of the liner; and the composite pipe is sleeved on the outer side of the lining, and the composite pipe and the lining are relatively fixed. According to the hollow composite insulator, the thickness of the middle area of the lining is larger than that of the end area of the lining along the axial direction of the lining, so that the corrosion resistance of the middle area of the lining is improved, and the service life of the hollow composite insulator is prolonged.
Description
Technical Field
The invention relates to the field of power transmission equipment, in particular to a hollow composite insulator and a circuit breaker.
Background
In devices such as circuit breakers, a hollow composite insulator is generally selected to achieve insulation and isolation, and the hollow insulator is generally filled with SF 6 insulating gas. When the circuit breaker and other devices are opened, higher interception overvoltage and electric arc are often generated, so that SF 6 insulating gas reacts with micro water in the gas to release hydrofluoric acid gas. Generally, a hollow composite insulator includes a cylindrical inner liner and a composite tube wrapped around the outer layer of the inner liner. Wherein the composite tube provides effective mechanical strength for the hollow composite insulator. The lining is generally formed by polyester material or polytetrafluoroethylene material, and has the advantages of high temperature resistance and hydrofluoric acid corrosion resistance so as to prevent the composite pipe from being corroded by hydrofluoric acid.
However, since devices such as circuit breakers generate more hydrofluoric acid gas in the middle region of the liner, the middle region of the liner needs to have higher corrosion resistance, which would otherwise reduce the service life of the hollow composite insulator.
Disclosure of Invention
Based on this, it is necessary to provide a hollow composite insulator that can effectively improve the corrosion resistance of the intermediate region of the liner.
A hollow composite insulator comprising:
A liner having a cylindrical shape, wherein a wall thickness of a middle section of the liner is greater than a wall thickness of an end region of the liner along an axial direction of the liner; and
The composite pipe is sleeved on the outer side of the lining, and the composite pipe and the lining are relatively fixed.
According to the hollow composite insulator, the thickness of the middle area of the lining is larger than that of the end area of the lining along the axial direction of the lining, so that the corrosion resistance of the middle area of the lining is improved, and the service life of the hollow composite insulator is prolonged.
In one embodiment, the outer side wall of the middle section of the liner is provided with a protrusion along the axial direction of the liner.
In one embodiment, the protrusions of the liner are bonded to the inner wall of the composite tube.
In one embodiment, the outer side wall of the lining is provided with a positioning part, and the inner wall of the composite pipe is provided with a positioning groove matched with the positioning part.
In one embodiment, the locating portion extends in an axial direction of the liner, and a length of the locating portion in the axial direction of the liner is equal to an axial length of the liner.
In one embodiment, a gap is formed between the inner liner and the composite pipe, and the gap is filled with an insulating medium.
In one embodiment, the pipe further comprises two flanges fixedly arranged at two ends of the composite pipe respectively, wherein the flanges are provided with accommodating cavities for accommodating the end parts of the composite pipe and the end parts of the lining.
In one embodiment, a gap is formed between the lining and the composite pipe, a filling hole communicated with the gap is formed in the flange, and the filling hole is communicated with the outside.
In one embodiment, the filling hole is a stepped hole, one end of the filling hole, which is close to the composite pipe, is a first end, one end of the filling hole, which is far away from the composite pipe, is a second end, and the cross-sectional area of the first end is larger than that of the second end.
The invention further provides a circuit breaker.
A circuit breaker comprises the hollow composite insulator provided by the invention.
The breaker comprises the hollow composite insulator provided by the invention, and the thickness of the middle area of the lining is larger than that of the end area of the lining along the axial direction of the lining, so that the corrosion resistance of the middle area of the lining is improved, and the service life of the hollow composite insulator is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of a hollow composite insulator according to an embodiment of the present invention.
Fig. 2 is a schematic A-A cross-sectional view of the hollow composite insulator of fig. 1.
Fig. 3 is a schematic structural view of the liner of fig. 1.
Fig. 4 is a schematic cross-sectional view of the composite tube of fig. 1.
Fig. 5 is a schematic structural view of the flange in fig. 1.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1 to 5, a hollow composite insulator 100 according to an embodiment of the present invention includes a cylindrical inner liner 110 and a composite tube 130 sleeved on the outer side of the inner liner 110 and fixed relative to the inner liner 110. Wherein, along the axial direction of liner 110, the thickness of the middle region of liner 110 is greater than the thickness of the end regions of liner 110.
It will be appreciated that the hollow composite insulator 100 further includes sheds 170. The structure of the umbrella skirt 170 is not improved, and will not be described in detail here.
The hollow composite insulator 100 has a thickness of a middle region of the inner liner 110 greater than that of an end region of the inner liner 110 in an axial direction of the inner liner 110, thereby increasing corrosion resistance of the middle region of the inner liner 110 and further increasing a life of the hollow composite insulator 100.
In addition, the intermediate region of liner 110 is thicker, which also increases the strength of the intermediate region of liner 110.
In this embodiment, the thickness of the middle region of the liner 110 is uniform, and the thickness of the end regions of the liner 110 is uniform, which is convenient for processing. The length of the intermediate region of liner 110 along the axial direction of liner 110 may be set according to specific corrosion resistance requirements.
In other possible embodiments, the thickness of the intermediate region of the liner may vary gradually. For example, the thickness of the intermediate region of the liner gradually decreases from the axially intermediate position of the liner toward both ends.
In this embodiment, the liner 110 is cylindrical. It is understood that in other embodiments, liner 110 is not limited to being cylindrical, but may be of regular or irregular cylindrical configuration, such as square cylindrical, depending on the particular application.
Alternatively, liner 110 may be a polytetrafluoroethylene liner or a polyester liner. Generally, polytetrafluoroethylene materials, polyester materials, and the like, are costly to form the material of liner 110. If the overall thickness of the liner is directly increased in order to increase the corrosion resistance of the intermediate region of the liner, this results in a higher cost of the liner.
In this embodiment, the liner 110 is disposed such that the thickness of the middle region of the liner 110 is greater than the thickness of the end regions of the liner 110, so that the cost of the liner can be effectively saved under the condition that the corrosion resistance of the middle region of the liner 110 can be increased.
Alternatively, the composite tube 130 may be a glass fiber reinforced plastic tube or an aramid tube. Of course, the composite tube is not limited to glass reinforced plastic tube or aramid tube, but may be formed of other composite materials.
Specifically, in the present embodiment, the outer side wall of the intermediate section of the liner 110 is provided with the convex portion 111 along the axial direction of the liner 110. That is, by providing the protrusion 111 on the outer side wall of the intermediate section of the liner 110, the thickness of the intermediate region of the liner 110 is made greater than the thickness of the end regions of the liner 110.
It will be appreciated that to increase the corrosion resistance of the intermediate region of liner 110, protrusion 111 completely covers the outer sidewall of the intermediate region of liner 110.
Conventionally, the hollow composite insulator is assembled by the steps of:
S01, providing a lining;
S02, coating a glue layer on the outer side wall of the lining;
S03, winding glass fiber or aramid fiber on the lining coated with the adhesive layer to form the composite tube 130.
Step S03 is manufactured by adopting a winding process, and has complex process and low production efficiency.
In the hollow composite insulator 100 provided in this embodiment, since the outer side wall of the inner liner 110 is provided with the protruding portion 111, a gap is formed between the inner liner 110 and the composite tube 130, so that the hollow composite insulator is not suitable to be directly wound on the inner liner 110 when the hollow composite insulator is formed, and the formed composite tube 130 is required to be adopted. Therefore, when the hollow composite insulator is assembled, the inner liner 110 and the composite tube 130 are directly assembled, and winding on the inner liner 110 is not needed, namely, the process is simple, and the production efficiency is high.
It will be appreciated that the manner in which the thickness of the intermediate region of the liner is achieved to be greater than the thickness of the end regions of the liner is not so limited.
For example, in one possible embodiment, the thickness of the intermediate region of the liner may be greater than the thickness of the end regions of the liner by providing a protrusion in the intermediate region of the inner wall of the liner.
For another example, in one possible embodiment, protrusions may be provided in the middle region of both the inner and outer walls of the liner to achieve a greater thickness in the middle region of the liner than in the end regions of the liner.
It should be noted that, of course, the provision of the protrusion in the middle region of the inner wall or the outer side wall of the inner liner is sufficient that the performance of other elements of the device such as a circuit breaker to which the hollow composite insulator is applied cannot be affected.
In this embodiment, the outer side wall of the liner 110 is provided with a positioning portion 113, and the inner wall of the composite tube 130 is provided with a positioning groove 131 matching the positioning portion 113.
It can be understood that the positioning portion 113 and the positioning groove 131 are disposed on the outer side of the liner 110 by the composite tube 130, so that the positioning portion 113 is inserted into the positioning groove 131 during the process of sleeving the composite tube 130 and the liner, and the extending direction of the positioning portion 113 is the axial direction of the liner 110 or is inclined at an acute angle to the axial direction of the liner 110. Therefore, the positioning portion 113 and the positioning groove 131 are used for realizing the circumferential positioning of the liner 110 and the composite tube 130.
In this embodiment, the positioning portion 113 extends along the axial direction of the liner 110, and the length of the positioning portion along the axial direction of the liner 110 is equal to the axial length of the liner 110. Therefore, when assembling the liner 110 and the composite pipe 130, the positioning portion 113 is simply inserted into the positioning groove 131 along the axial direction of the liner, and the assembly is convenient.
In addition, since the length of the positioning portion 113 in the axial direction of the liner 110 is equal to the axial length of the liner 110, the positioning portion 113 and the positioning groove 131 are subjected to less stress when the liner 110 and the composite pipe 130 have a tendency to rotate relative to each other.
In addition, in the present embodiment, the positioning portion 113 may also have the effect of reinforcing ribs, that is, may improve the strength and structural stability of the liner 110.
Further, in the present embodiment, four positioning portions 113 are disposed on the outer sidewall of the liner 110, and the four positioning portions 113 are uniformly distributed along the circumferential direction of the liner 110. In one aspect, liner 110 and composite tube 130 may be better positioned; on the other hand, when the relative rotation tendency of the liner 110 and the composite pipe 130 occurs, stress uniformly acts on the liner 110 and the composite pipe 130, thereby avoiding the phenomenon that local stress concentration occurs in the liner 110 and the composite pipe 130.
In this embodiment, a gap 120 is provided between liner 110 and composite tube 130. The gap 120 is filled with an insulating medium to improve the insulating performance of the gap 120. Specifically, the insulating medium may be polyurethane, rubber, sulfur hexafluoride, nitrogen, or the like.
Of course, it is understood that the manner of improving the insulating performance of the gap 120 is not limited thereto. For example, in other possible embodiments, a vacuum may be applied to improve the insulating properties of the gap 120.
In this embodiment, the hollow composite insulator 100 further includes two flanges 150 respectively fixed to two ends of the composite tube 130, and the flanges 150 have a receiving cavity 151 for receiving the ends of the composite tube 130 and the inner liner 110. Specifically, bottom wall 1511 of receiving cavity 151 abuts against both the end of composite tube 130 and the end of liner 110, thereby restricting relative movement of composite tube 130 and liner 110 in the axial direction of liner 110.
Positioning portion 113 and positioning groove 131 limit circumferential positioning of composite tube 130 and liner 110, and bottom wall 1511 of receiving cavity 151 limits axial positioning of composite tube 130 and liner 110, thereby achieving relative fixation of composite tube 130 and liner 110.
With the above-described fastening method, there is no need to bond the liner 110 to the composite pipe 130. On one hand, the adhesive material is saved; on the other hand, when the hollow composite insulator 100 is assembled, the bonding process is omitted, so that the process is simple; in yet another aspect, since no bonding is performed between liner 110 and composite tube 130, adjustment may be readily performed if the installation is not perfectly matched, while also being readily removable.
In this embodiment, a gap 120 is provided between liner 110 and composite tube 130. The flange 150 is provided with a filling hole 153 communicating with the gap 120 between the liner 110 and the composite pipe 130, and the filling hole 153 communicates with the outside. Accordingly, the insulating medium may be filled into the gap 120 between the liner 110 and the composite pipe 130 through the filling hole 153, facilitating the operation.
Further, the filling hole 153 is a stepped hole, one end of the filling hole 153 close to the composite tube 130 is a first end 1531, and one end of the filling hole 153 far away from the composite tube 130 is a second end 1533. The cross-sectional area of the first end 1531 of the fill hole 153 is greater than the cross-sectional area of the second end 1533 of the fill hole 153.
Specifically, in the present embodiment, two step surfaces are disposed between the first end 1531 of the filling hole 153 and the second end 1533 of the filling hole 153, the step surface near the first end 1531 of the filling hole 153 is a first step surface 1532, the step surface near the second end 1533 of the filling hole 153 is a second step surface 1534, and the second step surface 1534 coincides with the bottom wall 1511 of the receiving cavity 151. The cross-sectional area from the first end 1531 of the fill aperture 153 to the second end 1533 of the fill aperture 153 decreases progressively along the first step surface 1532 and the second step surface 1534. In other words, the aperture of the fill aperture 153 forms three progressively decreasing apertures from the first end 1531 to the second end 1533. The provision of such a stepped hole can increase the injection speed of the insulating medium, and the first and second stepped surfaces 1532 and 1534 can block the outflow of the insulating medium filled into the gap 120.
It will be appreciated that in other possible embodiments, the aperture of the filling hole 153 is not limited to three progressively decreasing apertures, but may be two or four or more, the more the number of apertures, the more stepped surfaces are formed, the more complex the internal path of the filling hole 153, the more significant the blocking effect and the better the seal.
It will be appreciated that in other possible embodiments, the fill aperture 153 is not limited to being stepped, but may be otherwise regular or irregular in shape, ensuring that the cross-sectional area of the fill aperture decreases gradually or stepwise from the first end to the second end.
In this embodiment, only one filling hole 153 is provided on the flange 150.
The flange is not limited to only one filling hole. The flange can be provided with a plurality of filling holes so as to facilitate the rapid filling of the insulating medium into the gap.
In addition, the plurality of filling holes are formed, so that the phenomenon that air bubbles exist in insulating media such as polyurethane and rubber caused by incapability of ventilation in a gap can be effectively avoided, and the insulating performance of the gap is better ensured.
In a possible embodiment, the hollow composite insulator further comprises a seal for sealing the filling hole, thereby further preventing outflow of the insulating medium in the gap between the inner liner and the composite tube, ensuring stability of the insulating properties of the hollow composite insulator.
In particular, the seal may be a countersunk bolt.
It will be appreciated that in other possible embodiments, the hollow composite insulator is not limited to sealing the fill hole by a seal, but may also be sealed by a fill sealant or the like.
It should be noted that, in other embodiments, the manner of fixing the liner 110 and the composite tube 130 is not limited thereto, and may be fixed by other manners.
For example, in one possible embodiment, the protrusions of the liner are bonded to the inner wall of the composite tube. So as to realize the relative fixation of the lining and the composite pipe.
Further, a thicker adhesive layer is coated at the gap between the lining and the composite pipe so as to fill the gap between the lining and the composite pipe and ensure the stability of the insulation performance of the gap between the lining and the composite pipe.
The embodiment of the invention also provides a circuit breaker which comprises the hollow composite insulator.
The breaker comprises the hollow composite insulator provided by the invention, and the thickness of the middle area of the lining is larger than that of the end area of the lining along the axial direction of the lining, so that the corrosion resistance of the middle area of the lining is improved, and the service life of the hollow composite insulator is prolonged.
According to the hollow composite insulator, the thickness of the middle area of the lining is larger than that of the end area of the lining along the axial direction of the lining, so that the corrosion resistance of the middle area of the lining is improved, and the service life of the hollow composite insulator is prolonged.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (5)
1. A hollow composite insulator, comprising:
A liner having a cylindrical shape, wherein a wall thickness of a middle section of the liner is greater than a wall thickness of an end region of the liner along an axial direction of the liner; and
The composite pipe is sleeved on the outer side of the lining, and the composite pipe and the lining are relatively fixed;
The outer side wall of the middle section of the lining is provided with a convex part along the axial direction of the lining so as to realize that the wall thickness of the middle section of the lining is larger than the thickness of the end region of the lining; the convex part of the lining is adhered to the inner wall of the composite pipe;
The outer side wall of the lining is provided with a positioning part, the inner wall of the composite pipe is provided with a positioning groove matched with the positioning part, the positioning part extends along the axial direction of the lining, and the length of the positioning part along the axial direction of the lining is equal to the axial length of the lining;
The hollow composite insulator further comprises two flanges which are respectively and fixedly arranged at two ends of the composite pipe, and each flange is provided with an accommodating cavity for accommodating the end part of the composite pipe and the end part of the lining.
2. The hollow composite insulator of claim 1, wherein a gap is provided between the liner and the composite tube, the gap being filled with an insulating medium.
3. The hollow composite insulator according to claim 1, wherein a gap is formed between the inner liner and the composite tube, a filling hole communicated with the gap is formed in the flange, and the filling hole is communicated with the outside.
4. A hollow composite insulator according to claim 3, wherein the filling hole is a stepped hole, the end of the filling hole close to the composite tube is a first end, the end of the filling hole remote from the composite tube is a second end, and the cross-sectional area of the first end is larger than the cross-sectional area of the second end.
5. A circuit breaker comprising a hollow composite insulator according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811643234.2A CN109786047B (en) | 2018-12-29 | 2018-12-29 | Hollow composite insulator and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811643234.2A CN109786047B (en) | 2018-12-29 | 2018-12-29 | Hollow composite insulator and circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109786047A CN109786047A (en) | 2019-05-21 |
| CN109786047B true CN109786047B (en) | 2024-05-14 |
Family
ID=66499502
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811643234.2A Active CN109786047B (en) | 2018-12-29 | 2018-12-29 | Hollow composite insulator and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109786047B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008027009A1 (en) * | 2006-08-31 | 2008-03-06 | Abb Research Ltd | High voltage dc bushing and high voltage dc device comprising such bushing |
| CN209418219U (en) * | 2018-12-29 | 2019-09-20 | 江苏神马电力股份有限公司 | Hollow combined insulator and breaker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008009333A1 (en) * | 2008-02-14 | 2009-08-20 | Lapp Insulator Gmbh & Co. Kg | Field-controlled composite insulator |
-
2018
- 2018-12-29 CN CN201811643234.2A patent/CN109786047B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008027009A1 (en) * | 2006-08-31 | 2008-03-06 | Abb Research Ltd | High voltage dc bushing and high voltage dc device comprising such bushing |
| CN209418219U (en) * | 2018-12-29 | 2019-09-20 | 江苏神马电力股份有限公司 | Hollow combined insulator and breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109786047A (en) | 2019-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2018271335B9 (en) | Composite cross-arm and transmission mast | |
| US5563379A (en) | Composite electrical insulator | |
| US20210025421A1 (en) | Multi-layer encapsulation system for joint sealing of vacuum insulated cabinets | |
| CA2702906C (en) | Integrated insulator seal and shield assemblies | |
| EP3813083B1 (en) | Flange with insulator and insulating pillar | |
| CN109786047B (en) | Hollow composite insulator and circuit breaker | |
| KR20170130649A (en) | Pressure vessel | |
| US4746381A (en) | Method of making an end cap connection for a fluid-resistance electrical device | |
| US6984790B1 (en) | Insulator sealing and shielding collar assembly | |
| US6307157B1 (en) | Composite insulators and a process for producing the same | |
| US6388197B1 (en) | Corona protection device of semiconductive rubber for polymer insulators | |
| KR20190101946A (en) | Cover for protecting pipe | |
| CN108233557A (en) | A kind of motor stator module and the Stator and electrical machine with the module | |
| CN110233008B (en) | Composite insulator | |
| CN209418219U (en) | Hollow combined insulator and breaker | |
| CN115136259B (en) | Bushing and electrical assembly | |
| JP7179989B2 (en) | Insulators for medium-voltage or high-voltage gas-insulated switchgear | |
| JP3568093B2 (en) | Polymer support insulator | |
| US5753864A (en) | Supporting insulator | |
| KR101115849B1 (en) | insulator assembly | |
| JPH09320369A (en) | Manufacture of capacitor bushing and resin impregnated capacitor bushing | |
| KR101697626B1 (en) | Spacer for gas insulated switchgear and manufacturing method of this | |
| WO2020186957A1 (en) | Auxiliary skirt and auxiliary skirt mounting method | |
| KR101127358B1 (en) | insulator assembly | |
| CN117108638A (en) | Transmission device |
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 |