CN113658823A - Low-contact resistance and earth-saving high-voltage isolating switch - Google Patents
Low-contact resistance and earth-saving high-voltage isolating switch Download PDFInfo
- Publication number
- CN113658823A CN113658823A CN202111073507.6A CN202111073507A CN113658823A CN 113658823 A CN113658823 A CN 113658823A CN 202111073507 A CN202111073507 A CN 202111073507A CN 113658823 A CN113658823 A CN 113658823A
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- CN
- China
- Prior art keywords
- closed container
- isolating switch
- contact
- liquid metal
- voltage isolating
- 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.)
- Pending
Links
- 229910001338 liquidmetal Inorganic materials 0.000 claims abstract description 30
- 230000007246 mechanism Effects 0.000 claims abstract description 6
- 239000012811 non-conductive material Substances 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 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
- 238000013021 overheating Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H29/00—Switches having at least one liquid contact
- H01H29/02—Details
- H01H29/04—Contacts; Containers for liquid contacts
- H01H29/06—Liquid contacts characterised by the material thereof
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- Gas-Insulated Switchgears (AREA)
Abstract
The invention discloses a low-contact resistance and earth-saving high-voltage isolating switch which comprises a first closed container and a second closed container, wherein a pair of contacts are arranged in the first closed container, liquid metal is stored in the second closed container, and the first closed container and the second closed container are communicated through a pump mechanism. The invention has the advantages of small contact resistance of the contact and no occupation of more ground area.
Description
Technical Field
The invention relates to the field of high-voltage isolating switches, in particular to a low-contact resistance and ground-saving high-voltage isolating switch.
Background
The isolating switch is a switch device which is mainly used for isolating a power supply and switching over, communicating and cutting off a small current circuit and has no arc extinguishing function. The isolation switch has a simple working principle and structure, but has high requirements on working reliability due to large usage amount, and has great influence on the design, establishment and safe operation of a substation and a power plant.
The high-voltage isolating switches have various models and various classification standards, and can be divided into a horizontal rotating type, a vertical rotating type, an inserting type, a swinging type and the like according to the motion mode of a moving contact. Due to the moving contact, a large occupied area is needed for installing the isolating switch, and the construction cost of a transformer substation and a power plant is increased due to the large occupied area nowadays when the land price is increased day by day. In the use process of the high-voltage isolating switch, contact resistance is increased due to phenomena of contact overheating, contact corrosion, loosening of a contact clamping component and the like, and finally the contact fails. Therefore, it is necessary to develop a high-voltage isolating switch with small floor space and small contact resistance of the contact.
Disclosure of Invention
The invention aims to provide a high-voltage isolating switch with low contact resistance and earth saving, which aims to solve the problems of large contact resistance and large occupied area of a high-voltage isolating switch contact in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a low contact resistance, festival high voltage isolator of ground which characterized in that: the liquid metal pump comprises a first closed container and a second closed container which are made of non-conductive materials, wherein a pair of contacts are arranged in the first closed container, one ends of the two contacts are respectively led out of the first closed container, liquid metal is stored in the second closed container, and the liquid metal pump further comprises a pump mechanism which is communicated with the first closed container and the second closed container.
The high-voltage isolating switch with low contact resistance and earth saving is characterized in that: the two contacts are respectively higher than the bottom in the first closed container in position.
The high-voltage isolating switch with low contact resistance and earth saving is characterized in that: the volume of the liquid metal stored in the second closed container is larger than or equal to the volume of the liquid metal when the liquid metal is introduced into the first closed container and simultaneously overflows through the two contacts.
The high-voltage isolating switch with low contact resistance and earth saving is characterized in that: the first closed container and the second closed container are respectively filled with protective gas.
The high-voltage isolating switch with low contact resistance and earth saving is characterized in that: the pump mechanism comprises two groups of pumps, wherein the inlet end of one group of pumps is communicated with the second closed container, the outlet end of the other group of pumps is communicated with the first closed container, and the inlet end of the other group of pumps is communicated with the second closed container.
Compared with the prior art, the invention adopts the liquid metal to flow in the two closed containers to realize the connection and disconnection of the two contacts, has the advantage of small contact resistance of the contacts, and the contacts do not need to act, thereby not occupying more ground area.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
As shown in fig. 1, the high-voltage isolating switch with low contact resistance and earth saving of the invention comprises a non-conductive first closed container 1 and a non-conductive second closed container 11, wherein a first contact 2 and a second contact 3 are respectively arranged on two symmetrical sides in the non-conductive first closed container 1, one end of each of the first contact 2 and the second contact 3 is respectively led out from the non-conductive first closed container 1, the other ends of the first contact 2 and the second contact 3 are opposite to each other, and liquid metal 4 is stored in the non-conductive second closed container 11.
The device also comprises a pump mechanism consisting of a first pump 5, a first liquid inlet pipe 6, a first liquid outlet pipe 7, a second pump 8, a second liquid inlet pipe 9 and a second liquid outlet pipe 10, wherein the inlet end of the second pump 8 is communicated with the inside of a non-conductive second closed container 11 through the second liquid inlet pipe 9, and the outlet end of the second pump 8 is communicated with the inside of the non-conductive first closed container 1 through the second liquid outlet pipe 10; the inlet end of the first pump 5 is communicated with the inside of the non-conductive first closed container 1 through a first liquid inlet pipe 6, and the outlet end of the first pump 5 is communicated with the inside of the non-conductive second closed container 11 through a first liquid outlet pipe 7.
When the high-voltage isolating switch is used as an upper opening isolating switch of a high-voltage circuit breaker, the first contact 2 and the second contact 3 are respectively connected with a power supply side and the high-voltage circuit breaker (or vice versa); when the high-voltage isolating switch is used as a lower opening isolating switch of a high-voltage circuit breaker, the first contact 2 and the second contact 3 are respectively connected with the high-voltage circuit breaker and a load side (or vice versa). The high-voltage isolating switch is switched on, namely the first contact 2 is electrically conducted with the second contact 3, and the high-voltage isolating switch is switched off, namely the first contact 2 is electrically disconnected with the second contact 3.
When the high-voltage isolating switch is in a closing state, all liquid metal in the non-conductive second closed container 11 is pumped into the non-conductive first closed container 1, the non-conductive first closed container 1 is filled with the liquid metal, at the moment, the liquid metal enables the first contact 2 and the second contact 3 to be electrically conducted (submerged, the first contact 2 and the second contact 3 are electrically conducted, and since the two solids of the first contact 2 and the second contact 3 are not directly connected but are respectively connected through the liquid metal, the contact resistance between the contacts is much smaller than that of the two contacts which are directly connected.
When the opening operation is needed, the first pump 5 is started to work, liquid metal in the non-conductive first closed container 1 is pumped out through the first liquid inlet pipe, the pumped liquid metal is sent to the non-conductive second closed container 11 through the first liquid outlet pipe 7, and the first contact 2 and the second contact 3 of the high-voltage isolating switch are not electrically conducted any more due to the fact that the liquid metal does not exist in the non-conductive first closed container 1 any more, and the opening operation of the high-voltage isolating switch is completed at the moment.
When the switching-on operation is needed, the second pump 8 is started to work, liquid metal in the non-conductive second closed container 11 is pumped out through the second liquid inlet pipe 9, the pumped liquid metal is sent to the non-conductive first closed container 1 through the second liquid outlet pipe 10, as the liquid metal is filled in the non-conductive first closed container 1, the first contact 2 and the second contact 3 of the high-voltage isolating switch are submerged in the liquid metal, the first contact 2 and the second contact 3 are electrically conducted, and at the moment, the switching-on of the high-voltage isolating switch is completed.
Because the contact of the high-voltage isolating switch has no action in the switching-on and switching-off process and is in a static state, and no space is needed for completing actions such as horizontal rotation, vertical rotation, insertion, swinging and the like, the occupied area required by a common high-voltage isolating switch is not needed, and the purpose of saving construction land is achieved.
The non-conductive first closed container 1 and the non-conductive second closed container 11 can be made of ceramics, glass and the like with certain thickness, and have a series of advantages of excellent insulating property, higher mechanical strength, ageing resistance, low price and the like; the first contact 2 and the second contact 3 of the high-voltage isolating switch are not arranged at the position close to the bottom of the non-conductive first closed container 1, so that the situation that when the liquid metal in the non-conductive first closed container 1 is pumped out by using the first pump 5 to perform high-voltage isolating switch opening, the liquid metal at the bottom is partially remained to cause the failure of the opening of the high-voltage isolating switch is avoided. The arrangement positions of the first contact 2 and the second contact 3 of the high-voltage isolating switch cannot be too far away from the bottom of the non-conductive first closed container 1, so that the first contact 2 and the second contact 3 of the high-voltage isolating switch can be submerged by more liquid metal to be successfully switched on when the high-voltage isolating switch is switched on, and the product cost is overhigh.
Air in the non-conductive first closed container 1 and the non-conductive second closed container 11 is extracted in advance, nitrogen slightly lower than the atmospheric pressure is filled, liquid metal oxidation in the non-conductive first closed container 1 and the non-conductive second closed container 11 is delayed, and the overhaul period and the service life of the high-voltage isolating switch are prolonged.
The embodiments of the present invention are described only for the preferred embodiments of the present invention, and not for the limitation of the concept and scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall into the protection scope of the present invention, and the technical content of the present invention which is claimed is fully set forth in the claims.
Claims (5)
1. The utility model provides a low contact resistance, festival high voltage isolator of ground which characterized in that: the liquid metal pump comprises a first closed container and a second closed container which are made of non-conductive materials, wherein a pair of contacts are arranged in the first closed container, one ends of the two contacts are respectively led out of the first closed container, liquid metal is stored in the second closed container, and the liquid metal pump further comprises a pump mechanism which is communicated with the first closed container and the second closed container.
2. The high-voltage isolating switch with low contact resistance and earth saving of claim 1, is characterized in that: the two contacts are respectively higher than the bottom in the first closed container in position.
3. The high-voltage isolating switch with low contact resistance and earth saving of claim 1, is characterized in that: the volume of the liquid metal stored in the second closed container is larger than or equal to the volume of the liquid metal when the liquid metal is introduced into the first closed container and simultaneously overflows through the two contacts.
4. The high-voltage isolating switch with low contact resistance and earth saving of claim 1, is characterized in that: the first closed container and the second closed container are respectively filled with protective gas.
5. The high-voltage isolating switch with low contact resistance and earth saving of claim 1, is characterized in that: the pump mechanism comprises two groups of pumps, wherein the inlet end of one group of pumps is communicated with the second closed container, the outlet end of the other group of pumps is communicated with the first closed container, and the inlet end of the other group of pumps is communicated with the second closed container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111073507.6A CN113658823A (en) | 2021-09-14 | 2021-09-14 | Low-contact resistance and earth-saving high-voltage isolating switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111073507.6A CN113658823A (en) | 2021-09-14 | 2021-09-14 | Low-contact resistance and earth-saving high-voltage isolating switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113658823A true CN113658823A (en) | 2021-11-16 |
Family
ID=78493951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111073507.6A Pending CN113658823A (en) | 2021-09-14 | 2021-09-14 | Low-contact resistance and earth-saving high-voltage isolating switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113658823A (en) |
-
2021
- 2021-09-14 CN CN202111073507.6A patent/CN113658823A/en active Pending
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