CN111106563A - Sealing joint for gas insulation switch cabinet - Google Patents
Sealing joint for gas insulation switch cabinet Download PDFInfo
- Publication number
- CN111106563A CN111106563A CN201911304482.9A CN201911304482A CN111106563A CN 111106563 A CN111106563 A CN 111106563A CN 201911304482 A CN201911304482 A CN 201911304482A CN 111106563 A CN111106563 A CN 111106563A
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- CN
- China
- Prior art keywords
- insulated switchgear
- gas insulated
- sealing
- gas
- epoxy resin
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/045—Details of casing, e.g. gas tightness
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses a sealing joint for a gas insulated switchgear, which comprises: the epoxy resin sealing body is integrally fixed at the opening of the gas insulated switchgear, a metal insert penetrates through the epoxy resin sealing body, a first internal thread groove is formed in one end, close to the opening of the gas insulated switchgear, of the metal insert, and a second internal thread groove is formed in the other end of the metal insert; the first internal thread groove is connected with a secondary control loop of the gas insulation switch cabinet; the secondary control loop is connected with a display device; the second internal thread groove is connected with a high-voltage current transformer inside the gas insulated switchgear. The connector can replace an aviation plug, the sealing defect of the connector body is avoided through mature and reliable epoxy resin pouring technology, the threads are arranged at the two ends of the insert, the secondary signal wire of the high-voltage current transformer and the pin hole of the aviation socket do not need to be manually welded, the sealing damage caused by welding is avoided, and the sealing reliability of the switch device is greatly improved.
Description
Technical Field
The invention relates to the technical field of switch equipment, in particular to a sealing joint for a gas insulation switch cabinet.
Background
The gas insulated switchgear has compact structure and reliable operation, and is widely applied to medium and high voltage power transmission and distribution networks for electric energy distribution and line protection. Typical solutions for switch cabinets include a cable entry cabinet, a metering cabinet, a sectionalizing isolation cabinet, a sectionalizing breaker cabinet, and an isolation cabinet. A bus lifting cabinet and the like. Wherein, high-voltage current transformers are required to be arranged in the sealed air boxes of the cable inlet and outlet cabinet, the metering cabinet and the sectional isolation cabinet, secondary signals of the current transformers are led out to a secondary control loop of the switch cabinet from the sealed air boxes by adopting transition joints, and the protection and measurement effects of the lines are achieved.
The aviation plug generally comprises a plug and a socket, and the connection and disconnection of a circuit are realized by the insertion and the separation of the plug and the socket. For a circular aviation plug, three modes of threaded connection, bayonet connection and pin connection are mainly adopted. The contact pin in the plug and the contact pin seat of the socket are poured in the metal shell of the plug through materials such as epoxy resin or plastics, a certain pressure difference exists between the inside of the gas box of the gas insulated switchgear and the outside atmosphere, and the aviation plug has good sealing performance and prevents the gas leakage of the switchgear.
In the daily operation and equipment maintenance process of the switch cabinet, the electrification condition of each cabinet or line needs to be determined, and the misoperation is prevented. Therefore, the live display function is the basic configuration that each switch cabinet must have.
For the cable incoming and outgoing switch cabinet, the live display signal is led out through the cable sleeve to realize the live monitoring function. The main functions of the sectional isolation cabinet and the sectional breaker cabinet are bus sectioning and communication, and cable connection is not needed.
In order to realize the live monitoring function of this cabinet type, need set up a cable sleeve alone, lead to gas tank internal layout structure to need redesign, cubical switchboard size grow. In order to ensure the insulation performance, an insulation plug is also required to be installed to seal the inner cavity of the cable sleeve, so that the manufacturing cost of the switch cabinet is increased.
In the gas insulated switchgear in the prior art, a built-in high-voltage current transformer is installed in a sealed gas tank. The air tightness of the air box is achieved after a secondary signal of the built-in high-voltage current transformer is transited from the inside of the air box to the outside of the air box. The aviation plug is selected as a solution. However, the structural characteristics of the aviation plug cause the body to be easy to generate defects in the casting manufacturing process, so that the air tightness is damaged.
When the product is used, a secondary signal wire of the high-voltage current transformer needs to be manually welded with a socket contact pin, and the risk of damaging the air tightness is increased again. Once the gas leakage happens to the gas insulation switch cabinet, the reliability of the product is greatly reduced, and meanwhile, the maintenance cost is increased.
The import of aviation plugs by existing products in order to ensure the reliability of the seal is a necessary choice. But the defects that the imported aviation plug has long delivery period and high price, cannot meet the 100 percent sealing reliability of all products and the like still exist.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide the sealing joint for the gas insulated switchgear, which has reliable sealing performance, good economy and convenient installation.
In order to realize the purpose of the invention, the adopted technical scheme is as follows:
a sealing joint for a gas insulated switchgear, comprising:
the epoxy resin sealing body is integrally fixed at an opening of the gas insulated switchgear, a metal insert penetrates through the epoxy resin sealing body, one end, close to the opening of the gas insulated switchgear, of the metal insert is provided with a first internal thread groove, and the other end of the metal insert is provided with a second internal thread groove;
the first internal thread groove is connected with a secondary control loop of the gas insulated switchgear; the secondary control loop is connected with a display device;
and the second internal thread groove is connected with a high-voltage current transformer inside the gas insulated switchgear.
In a preferred embodiment of the present invention, a side of the epoxy resin sealing body near the opening of the gas insulated switchgear is expanded outward, and the length of the metal insert is not shorter than the longest point of the middle part of the epoxy resin sealing body after expansion.
In a preferred embodiment of the present invention, a protective cover is disposed outside the opening of the gas insulated switchgear.
In a preferred embodiment of the present invention, a plurality of studs are fixed on a side wall of the gas insulated switchgear, a plurality of corresponding through grooves are formed in an epoxy resin sealing body of the sealing joint for the gas insulated switchgear, and the studs pass through the through grooves and then are fixed by a flat washer, a spring washer and a cap nut in sequence, so that the sealing joint for the gas insulated switchgear is fixed on the side wall of the gas insulated switchgear.
In a preferred embodiment of the present invention, the through grooves are first, second, third and fourth through grooves opened at four corners of the epoxy sealing body, and first, second, third and fourth studs are correspondingly installed in the first, second, third and fourth through grooves and are fixed sequentially by corresponding first, second, third and fourth flat washers, spring washers and cap nuts.
In a preferred embodiment of the invention, the first through groove and the second through groove are opened on the same horizontal line; the third and fourth through grooves are arranged on the same horizontal line.
In a preferred embodiment of the invention, the metal insert is connected with the high-voltage current transformer through a high-voltage current mutual inductance secondary wire.
In a preferred embodiment of the present invention, the first internally threaded groove is a low pressure end and the second internally threaded groove is a high pressure end.
In a preferred embodiment of the present invention, the epoxy resin sealing body is provided with a plurality of sealing grooves on one side close to the side wall of the gas insulated switchgear, and sealing is performed by placing sealing rings in the sealing grooves.
In a preferred embodiment of the present invention, the sealing grooves are first and second O-ring sealing grooves symmetrically formed on the upper and lower sides of the metal insert, and the sealing rings are first and second O-ring sealing rings mounted in the first and second O-ring sealing grooves.
The invention has the beneficial effects that:
the connector can replace an aviation plug, the sealing defect of the connector body is avoided through mature and reliable epoxy resin pouring technology, the threads are arranged at the two ends of the insert, the secondary signal wire of the high-voltage current transformer and the pin hole of the aviation socket do not need to be manually welded, the sealing damage caused by welding is avoided, and the sealing reliability of the switch device is greatly improved.
Drawings
Fig. 1 is a schematic view of a gas insulated switchgear of the present invention.
FIG. 2 is a schematic structural diagram of the present invention.
FIG. 3 is a schematic view of a partial structure of the present invention.
Fig. 4 is a schematic structural view of a metal insert of the present invention.
Detailed Description
The hermetic connector 100 for a gas insulated switchgear shown in fig. 1 to 4 includes an epoxy resin sealing body 110, and the epoxy resin sealing body 110 is integrally fixed to an opening 210 of a gas insulated switchgear 200.
With particular reference to fig. 2, the metal insert 120 penetrates through the epoxy sealing body 110, a portion of the epoxy sealing body 110, which is close to one side 110a of the opening 210 of the gas insulated switchgear 200, expands outward, and a length of the metal insert 120 is not shorter than a longest portion 110a of the expanded middle portion of the epoxy sealing body 110.
And a protection cover 130 is opened outside the opening 210 of the gas insulated switchgear 200.
With reference to fig. 2 and 4, an inner threaded groove 121a is formed at one end 121 of the metal insert 120 close to the opening 210 of the gas insulated switchgear 200, and an inner threaded groove 122a is formed at the other end 122 of the metal insert 120. The female thread groove 121a is a low pressure side and the female thread groove 122a is a high pressure side.
The internal thread groove 121a is connected with a secondary control loop 220 of the gas insulation switch cabinet 200; the secondary control circuit 220 is connected with a display device 250;
the internal thread groove 122a is connected to a high-voltage current transformer 230 inside the gas insulated switchgear 200 via a high-voltage current mutual inductance secondary line 240.
With particular reference to fig. 1 and 3, the studs 141, 142, 143, and 144 are fixed to the sidewall 201 of the gas insulated switchgear 200, the corresponding through grooves 111, 112, 113, and 114 are formed in the epoxy resin sealing body 110 of the gas insulated switchgear sealing joint 100, and the studs 141, 142, 143, and 144 pass through the through grooves 111, 112, 113, and 114 and then are fixed to the sidewall 201 of the gas insulated switchgear 200 through the flat washers 151, 152, 153, and 154, the spring washers 161, 162, 163, and 164, and the cap nuts 171, 172, 173, and 174, respectively. The through grooves 111 and 112 are arranged on the same horizontal line; the four through grooves 113 and 114 are formed on the same horizontal line.
The epoxy resin sealing body 110 has O- ring sealing grooves 171 and 172 formed on one side 110b close to the side wall 201 of the gas insulated switchgear 200, and O- rings 181 and 182 are placed in the O- ring sealing grooves 171 and 172 to seal the gas insulated switchgear.
The sealing joint 100 for the gas insulated switchgear can replace an aviation plug, avoids the sealing defect of a joint body through mature and reliable epoxy resin pouring technology, avoids manual welding of a secondary signal wire of a high-voltage current transformer and a pin hole of an aviation socket through the arrangement of internal threads at two ends of the metal insert 120, avoids sealing damage caused by welding, and greatly improves the sealing reliability of switch equipment
The imported aviation plug-in has long delivery period, the product cost is about 7 times of the sealing joint 100 for the gas insulated switchgear, and the sealing joint 100 for the gas insulated switchgear can greatly reduce the production cost, effectively control the production period of the switchgear and save the production management cost.
The high-low voltage design of the metal insert 120 realizes the induction of high-voltage signals by the low-voltage insert, realizes the live display function of the sectional isolation cabinet and the sectional breaker cabinet, and solves the problems of redesign of the gas tank arrangement structure, size enlargement of the gas tank and increase of the manufacturing cost caused by the installation of a cable sleeve for meeting the live display function of part of the cabinet types.
Claims (10)
1. The utility model provides a gas insulated switchgear is with sealing joint which characterized in that includes:
the epoxy resin sealing body is integrally fixed at an opening of the gas insulated switchgear, a metal insert penetrates through the epoxy resin sealing body, one end, close to the opening of the gas insulated switchgear, of the metal insert is provided with a first internal thread groove, and the other end of the metal insert is provided with a second internal thread groove;
the first internal thread groove is connected with a secondary control loop of the gas insulated switchgear; the secondary control loop is connected with a display device;
and the second internal thread groove is connected with a high-voltage current transformer inside the gas insulated switchgear.
2. The hermetic connector for gas-insulated switchgear, according to claim 1, wherein the side of said epoxy resin sealing body near said opening of said gas-insulated switchgear is expanded outward, and the length of said metal insert is not shorter than the longest point of the middle portion of said epoxy resin sealing body after expansion.
3. The hermetic connector for gas-insulated switchgear according to claim 1, wherein a protective cover is provided outside the opening of the gas-insulated switchgear.
4. The gas insulated switchgear assembly as claimed in claim 1, wherein a plurality of studs are fixed to the side wall of the gas insulated switchgear assembly, a plurality of corresponding through slots are formed in the epoxy resin sealing body of the gas insulated switchgear assembly, and the studs pass through the through slots and are fixed to the flat washers, the spring washers, and the cap nuts in sequence, so that the gas insulated switchgear assembly is fixed to the side wall of the gas insulated switchgear assembly.
5. The hermetic connector of claim 1, wherein the through grooves are first, second, third and fourth through grooves formed at four corners of the epoxy resin sealing body, and the first, second, third and fourth through grooves are respectively provided with first, second, third and fourth studs and are sequentially fixed by corresponding first, second, third and fourth flat washers, spring washers and cap nuts.
6. The hermetic connector for gas-insulated switchgear according to claim 5, wherein the first and second through-grooves are formed on the same horizontal line; the third and fourth through grooves are arranged on the same horizontal line.
7. The hermetic connector for gas insulated switchgear according to claim 1, wherein the metal insert is connected to the high-voltage current transformer through a high-voltage current transformer secondary line.
8. The hermetic connector for a gas insulated switchgear according to claim 1, wherein the first female screw groove is a low-voltage end and the second female screw groove is a high-voltage end.
9. The sealing joint for a gas insulated switchgear according to claim 1, wherein the epoxy resin sealing body has a plurality of sealing grooves formed on a side thereof adjacent to the side wall of the gas insulated switchgear, and the sealing joint is sealed by placing a sealing ring in the sealing grooves.
10. The sealing joint of claim 1, wherein the sealing grooves are first and second O-ring sealing grooves symmetrically formed on the upper and lower sides of the metal insert, and the sealing rings are first and second O-ring sealing rings mounted in the first and second O-ring sealing grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911304482.9A CN111106563A (en) | 2019-12-17 | 2019-12-17 | Sealing joint for gas insulation switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911304482.9A CN111106563A (en) | 2019-12-17 | 2019-12-17 | Sealing joint for gas insulation switch cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111106563A true CN111106563A (en) | 2020-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911304482.9A Pending CN111106563A (en) | 2019-12-17 | 2019-12-17 | Sealing joint for gas insulation switch cabinet |
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| Country | Link |
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| CN (1) | CN111106563A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952634A (en) * | 2021-03-04 | 2021-06-11 | 福建中能电气有限公司 | Monitoring module of sealed box body and switch cabinet |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352691Y (en) * | 2009-01-24 | 2009-11-25 | 大连第一互感器有限责任公司 | Mutual inductor insulator structure for gas insulated switchgear |
| CN201690157U (en) * | 2010-04-23 | 2010-12-29 | 厦门大一互科技有限公司 | Wiring board of GIS switch cabinet |
| CN202308893U (en) * | 2011-10-31 | 2012-07-04 | 中国西电电气股份有限公司 | Visible gas insulated metal closed switchgear |
| CN208028262U (en) * | 2018-04-16 | 2018-10-30 | 沈阳兴华航空电器有限责任公司 | A kind of high temperature resistant, the rectangular electric connector with sealing function |
-
2019
- 2019-12-17 CN CN201911304482.9A patent/CN111106563A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201352691Y (en) * | 2009-01-24 | 2009-11-25 | 大连第一互感器有限责任公司 | Mutual inductor insulator structure for gas insulated switchgear |
| CN201690157U (en) * | 2010-04-23 | 2010-12-29 | 厦门大一互科技有限公司 | Wiring board of GIS switch cabinet |
| CN202308893U (en) * | 2011-10-31 | 2012-07-04 | 中国西电电气股份有限公司 | Visible gas insulated metal closed switchgear |
| CN208028262U (en) * | 2018-04-16 | 2018-10-30 | 沈阳兴华航空电器有限责任公司 | A kind of high temperature resistant, the rectangular electric connector with sealing function |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112952634A (en) * | 2021-03-04 | 2021-06-11 | 福建中能电气有限公司 | Monitoring module of sealed box body and switch cabinet |
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Application publication date: 20200505 |
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