CN219958729U - Explosion-proof type external oil type expander for capacitive voltage transformer - Google Patents
Explosion-proof type external oil type expander for capacitive voltage transformer Download PDFInfo
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- CN219958729U CN219958729U CN202320779930.6U CN202320779930U CN219958729U CN 219958729 U CN219958729 U CN 219958729U CN 202320779930 U CN202320779930 U CN 202320779930U CN 219958729 U CN219958729 U CN 219958729U
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- expander
- explosion
- capacitive voltage
- proof
- corrugated pipe
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- 238000007789 sealing Methods 0.000 claims abstract description 43
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 18
- 230000001681 protective effect Effects 0.000 claims description 24
- 238000004880 explosion Methods 0.000 abstract description 4
- 239000003990 capacitor Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 229910052573 porcelain Inorganic materials 0.000 description 3
- 230000009172 bursting Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Housings And Mounting Of Transformers (AREA)
Abstract
The utility model provides an explosion-proof type external oil type expander for a capacitive voltage transformer, which relates to the technical field of capacitive voltage transformers and comprises a corrugated pipe, wherein an assembly flange is fixedly arranged at one end of the corrugated pipe, the assembly flange is provided with a sleeve connecting part, an expander breathing channel and a pressure relief channel, the sleeve connecting part can be in sealing connection with a sleeve through a fastener, and the expander breathing channel and the pressure relief channel can be communicated with the inner cavity of the corrugated pipe and the outside air; the assembly flange is also provided with a thimble, and one end of the thimble extends into the corrugated pipe; the other end of the corrugated pipe is provided with a bottom plate, and a position on the bottom plate corresponding to the thimble is provided with an explosion-proof piece. According to the utility model, the explosion-proof sheet can be burst through the ejector pin, so that the pressure in the sleeve is released through the pressure release channel, and the explosion of the capacitive voltage divider is avoided; meanwhile, the sealing flange on the voltage divider and the upper mounting plate of the external oil type expander are integrated together, so that the overall assembly efficiency of the capacitive voltage transformer is improved.
Description
Technical Field
The utility model relates to the technical field of capacitive voltage transformers, in particular to an explosion-proof type external oil expander for a capacitive voltage transformer.
Background
The voltage transformer is mainly divided into an electromagnetic voltage transformer and a capacitive voltage transformer, wherein the capacitive voltage transformer consists of a capacitive voltage divider and an electromagnetic unit, the capacitive voltage divider consists of a porcelain sleeve and a plurality of serially connected capacitors arranged in the porcelain sleeve, insulating oil with certain pressure is filled in the porcelain sleeve, and meanwhile, in order to ensure that the insulating oil can always have certain pressure in different temperature environments, an external oil type expander is mostly adopted as an insulating oil temperature compensation device to compensate the insulating oil.
At present, when the existing capacitive voltage transformer adopts an external oil type expander to perform insulating oil temperature compensation, a metal corrugated expander (hereinafter referred to as an expander) is generally directly arranged in a pressure divider cavity, and then the air in the inner cavity of the expander is communicated with the atmosphere outside the capacitive pressure divider through a breathing pipe, so that when the temperature of the inside of the transformer, namely an oil tank, is increased, the volume of insulating oil in the oil tank is increased, and meanwhile, the increased oil pressure acts on the expander, so that the air in the expander is exhaled to the atmosphere through the breathing pipe in sequence, and the expander is contracted, so that the volume is reduced, and the increase of the volume of the insulating oil is compensated; otherwise, the inner cavity of the expander sucks the atmosphere to extend the expander and enlarge the volume so as to compensate the reduction of the volume of the insulating oil.
However, when the capacitive voltage divider is in a fault state such as electrical breakdown, a large amount of gas is generated due to the cracking of insulating oil, and the pressure in the sleeve is increased sharply; and the existing external oil type expander lacks a pressure release channel, so that the external oil type expander is easy to cause sleeve bursting and even safety accidents. In addition, since the sealing mounting flanges of the expander and the pressure divider are commonly used as two separate accessories in the prior art, the assembly process of the expander is complicated, and the assembly efficiency of the expander is low.
Disclosure of Invention
The utility model solves the technical problem of providing the explosion-proof type external oil type expander for the capacitive voltage transformer, which has a pressure relief structure and is convenient to install, so that accidents such as sleeve explosion and the like caused by incapability of timely pressure relief when the internal pressure of the capacitive voltage divider in the capacitive voltage transformer is increased sharply are avoided, and the safety accident risk is further reduced.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the explosion-proof type external oil type expander for the capacitive voltage transformer comprises a corrugated pipe, wherein an assembly flange is fixedly arranged at one end of the corrugated pipe, the assembly flange is provided with a sleeve connecting part, an expander breathing channel and a pressure relief channel, the sleeve connecting part can be in sealing connection with a sleeve through a fastener, and the expander breathing channel and the pressure relief channel can be both communicated with the inner cavity of the corrugated pipe and the outside air; the assembly flange is also provided with a thimble, and one end of the thimble extends into the corrugated pipe; the other end of the corrugated pipe is provided with a bottom plate, and a position on the bottom plate corresponding to the thimble is provided with an explosion-proof piece. On one hand, as the explosion-proof sheet is arranged on the bottom plate of the outer oil type expander and the ejector pin is arranged on the assembly flange, even if the pressure of the capacitive voltage divider is increased due to internal faults, the explosion-proof sheet can be broken through the ejector pin when the outer oil type expander reaches the limit compression amount, so that the pressure is released through the pressure release channel, and the explosion-proof protection effect of the capacitive voltage divider is avoided; on the other hand, the utility model integrates the sealing flange on the voltage divider and the upper mounting plate of the external oil type expander, namely, the sealing flange is integrated into the assembly flange which has the functions of sealing and connecting the capacitive voltage divider and fixing the corrugated pipe at the same time, so that the overall assembly efficiency is improved.
Further, the bottom plate is provided with a protection bulge at the periphery of the explosion-proof piece so as to prevent the explosion-proof piece from being broken by mistake by a capacitor core in the capacitor voltage divider in a low-temperature state, and further avoid leakage caused by the explosion-proof piece.
Further, the breathing channel and the pressure relief channel of the expander are the same channel, so that the structure of the assembly flange is simplified.
Further, the air outlet of the pressure release channel is downwards arranged, so that the splash-proof effect is achieved.
Further, the assembly flange comprises a sealing flange and a protective cover plate, and the sealing flange can be fixedly connected with the end part of the sleeve and the end part of the corrugated pipe; the protective cover plate is arranged on the outer side of the sealing flange, and an expander breathing channel and a pressure relief channel can be formed between the protective cover plate and the sealing flange.
Further, the sealing flange and the protective cover plate are integrated, and the breathing channel and the pressure relief channel of the expander can be realized by punching holes on the assembly flange.
Further, the sealing flange and the protective cover plate are split pieces, the sealing flange and the protective cover plate are detachably connected, the end part of the thimble is detachably connected with the sealing flange, and the sealing flange and the protective cover plate can be directly connected through a buckle or through threads; the thimble is preferably in threaded connection with the sealing flange. Therefore, when the ejector pin is used, the protective cover plate can be opened to clean the breathing channel and the pressure release channel of the expander, and the ejector pin can be replaced.
From the above technical scheme, the utility model has the following advantages: on one hand, the explosion-proof sheet is arranged on the bottom plate of the outer oil type expander, and the ejector pins are arranged on the assembly flange, so that even if the pressure of the capacitive voltage divider is increased due to internal faults, the explosion-proof sheet can be ejected through the ejector pins when the outer oil type expander reaches the limit compression amount, so that the pressure is released through the pressure release channel, and the explosion of the capacitive voltage divider is avoided, so that the explosion-proof protection effect is realized; meanwhile, the explosion-proof piece can be prevented from being broken by mistake by the capacitor core in the capacitor voltage divider in a low-temperature state through the protective bulge arranged on the periphery of the explosion-proof piece on the bottom plate, so that leakage is prevented from being caused; on the other hand, the utility model integrates the sealing flange on the voltage divider and the upper mounting plate of the external oil type expander, namely, the sealing flange is integrated into the assembly flange which has the functions of sealing and connecting the capacitive voltage divider and fixing the corrugated pipe at the same time, so that the overall assembly efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.
In the figure: 1. sealing flange, 2, thimble, 3, protective cover plate, 4, pressure release passageway, 5, gas outlet, 6, bellows, 7, explosion-proof piece, 8, protective bulge, 9, bottom plate.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, the utility model provides an explosion-proof external oil type expander for a capacitive voltage transformer, which comprises a corrugated pipe 6, wherein one end of the corrugated pipe 6 is fixedly provided with an assembly flange, the assembly flange is provided with a sleeve connecting part, an expander breathing channel and a pressure release channel 4, and the sleeve connecting part can be in sealing connection with a sleeve through a fastener so as to realize the sealing of the sleeve; the breathing channel and the pressure release channel 4 of the expander can be communicated with the inner cavity of the corrugated pipe 6 and the outside air, so that the air can enter and exit the corrugated pipe. In addition, the assembly flange is also provided with a thimble 2, and one end of the thimble 2 extends into the corrugated pipe 6; the other end of the bellows 6 is provided with a bottom plate 9, the position, corresponding to the thimble 2, on the bottom plate 9 is provided with an explosion-proof sheet 7, and the periphery of the explosion-proof sheet 7 of the bottom plate 9 is provided with a protection protrusion 8. Therefore, even if the pressure of the capacitive voltage divider is increased due to internal faults, when the external oil type expander reaches the limit compression amount, the explosion-proof piece 7 is burst through the ejector pin 2, so that the pressure is released through the pressure release channel 4, and the explosion of the capacitive voltage divider is avoided, so that the explosion-proof protection effect is realized; meanwhile, the utility model can also prevent the explosion-proof piece 7 from being broken by mistake by the capacitor core in the capacitor voltage divider in a low-temperature state through the protective bulge 8 arranged on the periphery of the explosion-proof piece 7 on the bottom plate 9, thereby avoiding leakage.
In particular, the assembly flange comprises a sealing flange 1 and a protective cover plate 3. The sealing flange 1 can be in sealing connection with the end part of the sleeve through a sleeve connecting part and a corresponding fastener and a sealing piece, is fixedly connected with the end part of the corrugated pipe 6 in a welding mode and the like, and simultaneously realizes the functions of sealing connection with the capacitive voltage divider and fixing the corrugated pipe 6; the protective cover plate 3 is arranged on the outer side of the sealing flange 1, and an expander breathing channel and a pressure relief channel 4 are formed between the protective cover plate 3 and the sealing flange 1. Furthermore, in order to simplify the structure of the assembly flange, the protective cover plate 3 and the sealing flange 1 are preferably integrated, and the breathing channel and the pressure release channel 4 of the expander are preferably arranged as the same channel; in order to prevent severe splashing, the air outlet 5 of the pressure relief channel 4 is preferably arranged downwards.
In addition, the sealing flange 1 and the protective cover plate 3 can also be split, and at the moment, the sealing flange 1 and the protective cover plate 3 can be detachably connected together through a fastening structure or a threaded connection structure, and the thimble 2 can be installed on the sealing flange 1 through a threaded structure.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The explosion-proof type external oil type expander for the capacitive voltage transformer comprises a corrugated pipe and is characterized in that an assembly flange is fixedly arranged at one end of the corrugated pipe, the assembly flange is provided with a sleeve connecting part, an expander breathing channel and a pressure relief channel, the sleeve connecting part can be in sealing connection with a sleeve through a fastener, and the expander breathing channel and the pressure relief channel can be communicated with the inner cavity of the corrugated pipe and the outside air; the assembly flange is also provided with a thimble, and one end of the thimble extends into the corrugated pipe; the other end of the corrugated pipe is provided with a bottom plate, and a position on the bottom plate corresponding to the thimble is provided with an explosion-proof piece.
2. The explosion-proof type external oil type expander for capacitive voltage transformer according to claim 1, wherein the bottom plate is provided with a protection protrusion at the periphery of the explosion-proof sheet.
3. The explosion-proof external oil type expander for capacitive voltage transformer according to claim 1, wherein the breathing channel and the pressure release channel of the expander are the same channel.
4. An explosion-proof external oil expander for a capacitive voltage transformer according to claim 1 or 3 and wherein the air outlet of the pressure relief channel is arranged downwardly.
5. The explosion-proof type external oil expander for the capacitive voltage transformer according to claim 1, wherein the assembly flange comprises a sealing flange and a protective cover plate, and the sealing flange can be fixedly connected with the end part of the sleeve and the end part of the corrugated pipe; the protective cover plate is arranged on the outer side of the sealing flange, and an expander breathing channel and a pressure relief channel can be formed between the protective cover plate and the sealing flange.
6. The explosion-proof external oil expander for capacitive voltage transformers according to claim 5 wherein the sealing flange and the protective cover plate are one piece.
7. The explosion-proof type external oil expander for the capacitive voltage transformer according to claim 5, wherein the sealing flange and the protective cover plate are separate pieces, the sealing flange and the protective cover plate are detachably connected, and the end part of the thimble is detachably connected with the sealing flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320779930.6U CN219958729U (en) | 2023-04-04 | 2023-04-04 | Explosion-proof type external oil type expander for capacitive voltage transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320779930.6U CN219958729U (en) | 2023-04-04 | 2023-04-04 | Explosion-proof type external oil type expander for capacitive voltage transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219958729U true CN219958729U (en) | 2023-11-03 |
Family
ID=88542706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320779930.6U Active CN219958729U (en) | 2023-04-04 | 2023-04-04 | Explosion-proof type external oil type expander for capacitive voltage transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219958729U (en) |
-
2023
- 2023-04-04 CN CN202320779930.6U patent/CN219958729U/en active Active
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