CN110783134A - Quick earthing switch with air compressing device - Google Patents
Quick earthing switch with air compressing device Download PDFInfo
- Publication number
- CN110783134A CN110783134A CN201910938076.1A CN201910938076A CN110783134A CN 110783134 A CN110783134 A CN 110783134A CN 201910938076 A CN201910938076 A CN 201910938076A CN 110783134 A CN110783134 A CN 110783134A
- Authority
- CN
- China
- Prior art keywords
- air
- grounding switch
- contact
- air compressing
- compressing device
- 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
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
- H01H33/32—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/22—Selection of fluids for arc-extinguishing
Landscapes
- Circuit Breakers (AREA)
Abstract
A quick grounding switch with an air compressing device belongs to the technical field of quick grounding switches. The quick grounding switch with the air compressing device comprises a fixed contact, a movable contact, an operating mechanism and the air compressing device arranged in a sealing cylinder, wherein the air compressing device comprises an air compressing cylinder, the interior of the air compressing cylinder is divided into an air compressing chamber and an air inlet chamber through a piston plate sleeved on the movable contact, the air compressing chamber is communicated with the interior of the movable contact through a plurality of first air holes, the air inlet chamber is communicated with a GIL pipeline through a plurality of second air holes, one end of the movable contact is matched with the fixed contact, the other end of the movable contact is connected with the operating mechanism, and the operating mechanism drives the movable contact to reciprocate to be communicated with or disconnected from the fixed contact. The quick grounding switch with the air compressing device optimizes the structure of the quick grounding switch, enhances the arc quenching capability, and improves the capability of the quick grounding switch for breaking induced current and the working reliability thereof.
Description
Technical Field
The invention relates to the technical field of a quick grounding switch, in particular to a quick grounding switch with an air compressing device.
Background
The fast grounding switch (HSGS) installed on the GIL pipeline is operated by a spring mechanism to quickly guide the induced current in the line to the ground, thereby protecting the line equipment and the safety of the operation and maintenance personnel. When the fault is a transient fault, whether the potential supply arc of the fault point can be smoothly self-extinguished plays a role in determining whether the single-phase reclosing can be successfully carried out, and meanwhile, the requirements on the performance and the parameters of the quick grounding switch in corresponding voltage classes and different application environments are different.
Because the GIL line is long and the load of the live line is large, when a single-phase earth fault occurs, a GIL grounding switch needs to be installed to reliably ground a fault loop so as to eliminate the damage of the secondary arc current to maintainers, and the safe separation of the fault section repair line from the ground is ensured after the repair, and the repair line is put into normal operation. In the prior art, an earthing switch suitable for an extra-high voltage GIL pipeline is not available to guarantee the successful on-off of a secondary arc current.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a quick grounding switch with an air compressing device, which optimizes the structure of the quick grounding switch, enhances the arc quenching capability, and improves the induced current breaking capability and the working reliability of the quick grounding switch.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a fast grounding switch with an air compressing device comprises a static contact, a moving contact, an operating mechanism and the air compressing device arranged in a sealing cylinder;
the air compressing device comprises an air compressing cylinder, the interior of the air compressing cylinder is divided into an air compressing chamber and an air inlet chamber by a piston plate sleeved on the movable contact, the air compressing chamber is communicated with the interior of the movable contact through a plurality of first air holes, and the air inlet chamber is communicated with the GIL pipeline through a plurality of second air holes;
one end of the moving contact is matched with the fixed contact, the other end of the moving contact is connected with the operating mechanism, and the operating mechanism drives the moving contact to reciprocate to connect or disconnect the moving contact and the fixed contact.
In the technical scheme, the air compressing device is an ultra-B type quick grounding switch suitable for the extra-high voltage GIL pipeline, the breaking capacity is stronger, and the secondary arc current can be guaranteed to be successfully broken.
The air cylinder is a stepped cylindrical cavity, the top of the air cylinder is connected with the GIL pipeline, and the diameter of the upper cavity of the air cylinder is smaller than that of the lower cavity of the air cylinder.
In the technical scheme, the diameter of the upper cavity is small, so that the sealing of the gas compression chamber is ensured when the arc is extinguished, the arc extinguishing capability is enhanced, and the effect of rapidly extinguishing the arc is achieved; the diameter of the lower cavity is large, so that the circulation of insulating gas in the air cylinder is promoted after arc quenching is finished, and the effect of pressure equalization is achieved.
The piston plate is smoothly and reliably connected with the inner wall of the upper cavity of the air cylinder.
Among the above-mentioned technical scheme, the smooth reliable connection of the inner wall of piston plate and air cylinder upper portion cavity makes the periphery of piston plate and the inner wall contact of air cylinder upper portion cavity guarantee the sealed of air chamber to make the friction between piston plate and the air cylinder upper portion cavity inner wall very little, the piston plate reciprocating motion raise the efficiency of being convenient for.
The first air holes are arranged at the other end of the moving contact and used for enabling the flow velocity of insulating gas in a channel formed between the fixed contact and the moving contact to be high when the fixed contact and the moving contact are just separated, and the effect of quickly extinguishing an arc is achieved.
The piston plate is made of a conductive material, preferably an aluminum sheet material.
The moving contact is located at the axis position of the air cylinder, a connecting rod of the operating mechanism penetrates through the bottom of the air cylinder to be connected with the other end of the moving contact, and the connecting position of the connecting rod and the bottom of the air cylinder is sealed.
The static contact is provided with a static end shielding cover.
In the technical scheme, the static end shield is arranged around the static contact, the static end shield can balance voltage, the field intensity distortion of the part with larger curvature of the static contact is inhibited seriously, and metal steam, electrons and ions generated in the arcing process can be diffused in a short time and adsorbed on the static end shield to be condensed, so that the electric arc is forced to be extinguished when the current crosses zero, and the insulation is recovered.
The invention has the beneficial effects that:
1) the invention is suitable for the extra-high voltage GIL pipeline, can ensure the successful on-off of the secondary arc current, enhances the arc quenching capability, and improves the capability of the quick grounding switch for breaking the induced current and the working reliability thereof;
2) when the moving contact and the static contact move to be just separated, the flow channel formed between the static contact and the moving contact is extremely narrow, so that the flow velocity of the insulating gas in the channel is high, and the effect of quickly extinguishing the arc is achieved;
3) when the piston plate moves downwards, the gas pressure inside the gas compression chamber and the moving contact is increased, the gas pressure inside the gas inlet chamber is reduced, the flow rate of the insulating gas is increased, and the rapid arc quenching is promoted;
4) the sealing cylinder can effectively prevent the leakage of insulating gas, ensure that the insulating gas in the GIL pipeline is not polluted and realize the effect of quickly extinguishing the arc;
5) the technical scheme of the invention can be obtained by modifying the ultrasonic B-type quick grounding switch in the prior art, and compared with the quick grounding switch in the prior art, the air compressing device is added, so that the cost is saved.
Additional features and advantages of the invention will be set forth in part in the detailed description which follows.
Drawings
Fig. 1 is a schematic front view of a fast grounding switch with a compressor according to an embodiment of the present invention;
FIG. 2 is a schematic side view of a fast grounding switch with a compressor according to an embodiment of the present invention;
fig. 3 is a schematic view of a movable contact and a fixed contact when the movable contact is communicated with the fixed contact according to the embodiment of the invention;
fig. 4 is a schematic diagram of the moving contact and the fixed contact when the moving contact is disconnected according to the embodiment of the present invention.
Reference numerals in the drawings of the specification include:
1-static end shield cover, 2-static contact, 3-moving contact, 4-moving end shield cover, 5-second air hole, 6-piston plate, 7-sealing cylinder, 8-air compression chamber, 9-connecting rod, 10-air inlet chamber, 11-first air hole, 12-operating mechanism, 13-air compression cylinder and 14-central conductor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are used only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In order to solve the problems in the prior art, as shown in fig. 1 to 4, an embodiment of the present invention provides a fast grounding switch with an air compressing device, which optimizes a structure of the fast grounding switch, enhances an arc quenching capability, and improves an induced current breaking capability and a working reliability of the fast grounding switch.
As shown in fig. 1-4, the fast grounding switch with the air compressing device comprises a fixed contact 2, a movable contact 3, an operating mechanism 12 and the air compressing device arranged inside a sealed cylinder 7, and the air compressing device is arranged to be an ultra-B fast grounding switch suitable for an extra-high voltage GIL pipeline, so that the on-off capability is stronger, and the successful on-off of a secondary current can be ensured. The air compression device comprises a compression cylinder 13, the compression cylinder 13 is a stepped cylindrical cavity, the top of the compression cylinder is connected with a GIL pipeline, the diameter of the upper cavity of the compression cylinder 13 is smaller than that of the lower cavity, the diameter of the upper cavity is small, the sealing of the compression chamber 8 is ensured when the arc is extinguished, the arc extinguishing capability is enhanced, and the rapid arc extinguishing effect is achieved; the diameter of the lower cavity is large, so that the circulation of insulating gas in the pressure cylinder 13 after arc quenching is finished is promoted, and the effect of pressure equalization is achieved. The inside piston plate 6 that establishes on moving contact 3 through the cover of air cylinder 13 separates for air compression chamber 8 and inlet chamber 10, piston plate 6 adopts electrically conductive material, preferably aluminum sheet material, and piston plate 6 makes the periphery of piston plate 6 and the inner wall contact of air cylinder 13 upper portion cavity guarantee air compression chamber 8 sealed with the smooth reliable connection of the inner wall of air cylinder 13 upper portion cavity to make the friction between piston plate 6 and the 13 upper portion cavity inner walls of air cylinder very little, the piston plate 6 reciprocating motion raise the efficiency of being convenient for. The pressure air chamber 8 is communicated with the inside of the moving contact 3 through a plurality of first air holes 11, the air inlet chamber 10 is communicated with a GIL pipeline through a plurality of second air holes 5, the moving contact 3 drives the piston plate 6 to move to change the pressure of the pressure air chamber 8 to realize the function of increasing the air flow rate, one end of the moving contact 3 is matched with the static contact 2, the other end of the moving contact 3 is connected with the operating mechanism 12, the operating mechanism 12 drives the moving contact 3 to reciprocate to be communicated with or disconnected from the static contact 2, the plurality of first air holes 11 are arranged at the other end of the moving contact 3 to ensure that the flow rate of the insulating air in a channel formed between the static contact 2 and the moving contact 3 is high when the moving contact 2 is just separated so as to achieve the effect of quick arc extinguishing, the moving contact 3 is positioned at the axial position of the pressure air cylinder 13, and the connecting rod 9, the junction of connecting rod 9 and puffer cylinder 13 bottom is sealed, and puffer cylinder 13 is located the inside of sealed jar 7, but does not have gaseous intercommunication between puffer cylinder 13 and the sealed jar 7, is provided with insulating gas in the sealed jar 7, in case gas leakage phenomenon appears in the junction of connecting rod 9 and puffer cylinder 13 bottom, insulating gas in the sealed jar 7 can guarantee the gas purity in the quick earthing switch, improves the security. The static contact 2 is provided with the static end shield cover 1 around, the static end shield cover 1 can balance voltage, the field intensity distortion of the part with larger curvature of the static contact 2 is inhibited seriously, and metal steam, electrons and ions generated in the arcing process can be diffused in a short time and adsorbed on the static end shield cover 1 to be condensed, so that the electric arc is forced to be extinguished when the current crosses zero, and the insulation is recovered.
In this embodiment, the sealing cylinder 7 is connected to the GIL pipe, the moving contact 3 is a hollow moving contact, the prior art can be adopted, the other end of the moving contact 3 located in the puffer cylinder 13 is provided with 4 first air holes 11 for communicating the puffer chamber 8 with the inside of the moving contact 3, 4 second air holes 5 are provided between the air inlet chamber 10 and the GIL pipe, and the diameters of the first air holes 11 and the second air holes 5 are adjusted according to the different levels of the switching-on and switching-off voltage to achieve the switching-on and switching-off effect. The operating mechanism can adopt an operating mechanism 12 in the prior art quick grounding switch and can comprise a connecting rod 9, a mechanism connecting plate and the like which are connected in a pivot mode. Static contact 2 is surrounded by static end shield 1, static end shield 1 is installed on the central conductor 14 of GIL pipeline, moving contact 3 periphery is installed and is moved end shield 4, for even electric field, one side that moving end shield 4 is close to moving contact 3 is provided with the circumferential groove, the guide ring is installed to the circumferential groove, be used for guaranteeing moving contact 3 reciprocating motion's stability, static end shield 1 and moving end shield 4 are the metal construction that electric conductive property is good, static contact 2 and moving contact 3 matched part are high temperature resistant tungsten-copper alloy.
The working principle of the quick grounding switch with the air compressing device is as follows:
when the GIL pipeline fails, as shown in fig. 3, the static contact 2 and the moving contact 3 are in a connected state;
after the fault of the GIL pipeline is removed, as shown in fig. 4, the operating mechanism 12 is opened, the operating mechanism 12 operates to make the connecting rod 9 of the operating mechanism pull the moving contact 3 to move downwards together with the piston plate 6, the gas pressure inside the gas compression chamber 8 and the moving contact 3 is increased, and the gas pressure inside the gas inlet chamber 10 is reduced; when the moving contact 3 and the static contact 2 move to be just separated, because the airflow channel formed between the static contact 2 and the moving contact 3 is extremely narrow, the flow velocity of the insulating gas in the channel formed between the static contact 2 and the moving contact 3 is high, and the effect of quickly extinguishing the arc is achieved; after the moving contact 3 continues to move downward for a certain distance, the piston plate 6 moves into the cavity at the lower part of the air compression chamber 8, the insulating gas in the air compression chamber 8 rapidly flows into the air inlet chamber 10, and the effect of pressure equalization is achieved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. A fast grounding switch with an air compressing device is characterized by comprising a static contact, a moving contact, an operating mechanism and the air compressing device arranged in a sealing cylinder;
the air compressing device comprises an air compressing cylinder, the interior of the air compressing cylinder is divided into an air compressing chamber and an air inlet chamber by a piston plate sleeved on the movable contact, the air compressing chamber is communicated with the interior of the movable contact through a plurality of first air holes, and the air inlet chamber is communicated with the GIL pipeline through a plurality of second air holes;
one end of the moving contact is matched with the fixed contact, the other end of the moving contact is connected with the operating mechanism, and the operating mechanism drives the moving contact to reciprocate to connect or disconnect the moving contact and the fixed contact.
2. The fast grounding switch with a gas compressing device as claimed in claim 1, wherein the pressure cylinder is a stepped cylindrical cavity, the top of the pressure cylinder is connected with the GIL pipeline, and the diameter of the upper cavity of the pressure cylinder is smaller than that of the lower cavity.
3. The fast grounding switch with a compressor as claimed in claim 2, wherein the piston plate is smoothly and reliably connected with the inner wall of the upper cavity of the compression cylinder.
4. The fast grounding switch with a gas compressing device as claimed in claim 1, wherein a plurality of the first gas holes are provided at the other end of the movable contact.
5. The fast grounding switch with a gas compressing device as claimed in claim 1, wherein the piston plate is made of an electrically conductive material.
6. The fast grounding switch with a gas compressing device as claimed in claim 1, wherein the moving contact is located at an axial position of the pressure cylinder, a connecting rod of the operating mechanism penetrates through the bottom of the pressure cylinder to be connected with the other end of the moving contact, and a joint of the connecting rod and the bottom of the pressure cylinder is sealed.
7. The fast grounding switch with a pressure device as claimed in claim 1, wherein the stationary contact is provided with a stationary end shield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910938076.1A CN110783134A (en) | 2019-09-30 | 2019-09-30 | Quick earthing switch with air compressing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910938076.1A CN110783134A (en) | 2019-09-30 | 2019-09-30 | Quick earthing switch with air compressing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110783134A true CN110783134A (en) | 2020-02-11 |
Family
ID=69385210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910938076.1A Pending CN110783134A (en) | 2019-09-30 | 2019-09-30 | Quick earthing switch with air compressing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110783134A (en) |
-
2019
- 2019-09-30 CN CN201910938076.1A patent/CN110783134A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9058947B2 (en) | Puffer-type gas circuit-breaker | |
| CN210516594U (en) | Quick earthing switch with air compressing device | |
| CN110783134A (en) | Quick earthing switch with air compressing device | |
| CN217934787U (en) | Arc extinguish chamber for gas insulation switch cabinet | |
| WO2012049730A1 (en) | Gas circuit breaker | |
| US20180226214A1 (en) | Gas Breaker | |
| CN101989511A (en) | Load switch | |
| CN112366113B (en) | Protection structure of vacuum arc-extinguishing chamber corrugated pipe under high gas pressure and working method | |
| CN110086111B (en) | Liquid nitrogen switch and working method thereof | |
| KR20150144415A (en) | Gas isolated circuit breaker | |
| CN113808891A (en) | Self-excitation air-blast arc extinguisher | |
| US11545322B2 (en) | Gas circuit breaker | |
| CN210516593U (en) | Quick earthing switch with arc quenching device | |
| CN209947744U (en) | For high-pressure SF6Thread type contact of circuit breaker | |
| US11373824B2 (en) | Gas-insulated high or medium voltage circuit breaker | |
| CN110706967A (en) | Quick earthing switch with arc quenching device | |
| CN219040337U (en) | Conductive structure of vacuum arc-extinguishing chamber | |
| US11217408B2 (en) | Gas circuit breaker | |
| CN216311705U (en) | Self-excitation air-blast arc extinguisher | |
| CN220420494U (en) | Low-temperature-resistant self-energy sulfur hexafluoride high-voltage circuit breaker | |
| CN215988565U (en) | Novel high-pressure SF6Self-energy blowing-assistant type circuit breaker arc extinguish chamber | |
| JP6736345B2 (en) | Gas circuit breaker | |
| CN212084873U (en) | Novel high-voltage arc extinguishing device | |
| CN215681530U (en) | Low-voltage or medium-voltage gas-insulated switchgear | |
| CN219936934U (en) | High-voltage switch complete 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 |