CN114256010B - Pole for normal pressure sealing switch and normal pressure sealing switch - Google Patents
Pole for normal pressure sealing switch and normal pressure sealing switch Download PDFInfo
- Publication number
- CN114256010B CN114256010B CN202111346903.1A CN202111346903A CN114256010B CN 114256010 B CN114256010 B CN 114256010B CN 202111346903 A CN202111346903 A CN 202111346903A CN 114256010 B CN114256010 B CN 114256010B
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- shell
- pressure sealed
- pull rod
- atmospheric pressure
- sealed switch
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- 238000007789 sealing Methods 0.000 title abstract description 11
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 239000002184 metal Substances 0.000 claims abstract description 21
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 238000009413 insulation Methods 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000003068 static effect Effects 0.000 claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 9
- 229920006351 engineering plastic Polymers 0.000 claims description 8
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 12
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000001746 injection moulding Methods 0.000 description 12
- 230000005684 electric field Effects 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 230000001976 improved effect Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 230000016507 interphase Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/58—Electric connections to or between contacts; Terminals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The pole column for the normal pressure sealed switch comprises a shell, wherein an arc extinguish chamber is arranged at the upper part of an inner cavity of the shell, the lower end of the arc extinguish chamber is connected with an outgoing busbar through a flexible connection, the flexible connection and the outgoing busbar are connected with the static end of an insulating pull rod, and the movable end of the insulating pull rod penetrates out of the shell; the sealed switch comprises a metal box body, three pairs of bus sleeves are arranged on the left side plate and the right side plate of the box body, three inverted poles and transmission mechanisms of a three-phase circuit breaker are arranged on the upper portion of an inner cavity of the box body, two ends of an outgoing bus of each pole are connected with one pair of bus sleeves, a circuit breaker operating mechanism is arranged on the outer side of the box body, the circuit breaker operating mechanism is connected with the three transmission mechanisms, and the transmission mechanisms are connected with the movable ends of insulation pull rods of the poles. The pole is detachably installed and maintained, so that the cost is reduced, the size is small, and the reliability is high; the sealing switch has the advantages of simple and compact structure, safe use, convenient maintenance and realization of modularized design.
Description
Technical Field
The invention relates to the technical field of distribution equipment, in particular to a pole for a full-metal full-insulation closed type switchgear with air as a main insulation medium, and particularly relates to a pole for a breaker switch and a normal-pressure sealed switch, which are used in a 12kV normal-pressure sealed switch cabinet and are used for safely and effectively isolating and switching off network current.
Background
The low-carbon development of the electric power industry serving as an important field for realizing the double-carbon target has positive effect on realizing the double-carbon target in China. For decades, with the development of new insulating materials and technologies, numerous power distribution equipment production companies at home and abroad carry out several times of important technical upgrades on the medium-voltage switch cabinet, and the used insulating medium realizes the processes from air insulation, SF6 gas insulation, and finally solid insulation and environment-friendly gas insulation. The air-insulated switch has the defects of large volume and large occupied area; the defect of the SF6 gas insulated switch is contrary to the environmental protection concept; the solid insulation switch has the defect of poor and intentional temperature rise, which is always the problem of industry; the environment-friendly gas switch is charged with micro positive pressure, and the defect is that the risk of leakage of sealing elements or welding leakage exists.
The appearance of the normal pressure sealing switch in recent years provides a new direction for industry development. Conventional air switches or gas-filled switches often use epoxy resin as an insulating support, an engineering plastic insulating plate as electrical insulation, and a micro-positive pressure insulating gas.
How to design a pole for a normal pressure sealed switch and a normal pressure sealed switch which can solve the defects of the insulating switches is a subject of intensive research of the inventor.
Disclosure of Invention
The invention aims to provide a pole for an atmospheric pressure sealed switch and the atmospheric pressure sealed switch, wherein the pole is detachably installed and maintained, the cost is reduced, the size is small, the reliability is high, the structure of the sealed switch is simple and compact, the use is safe, the maintenance is convenient, and the modularized design can be realized.
In order to achieve the above object, the technical solution of the present invention is: the utility model provides a pole for normal pressure sealed switch, includes the shell, the inner chamber upper portion of shell is provided with the explosion chamber, the lower extreme of explosion chamber is connected with the female row of being qualified for the next round of competitions through the flexible coupling, the female row of being qualified for the next round of competitions is connected with the quiet end of insulating pull rod, the moving end of insulating pull rod wears out the shell.
Preferably, the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are connected in a detachable connection mode, wire outlet holes are respectively formed in the left side and the right side of the lower part of the lower shell, and two wire outlet holes penetrate through two ends of the wire outlet busbar.
Preferably, a first umbrella skirt is arranged in the middle of the outer surface of the upper shell, and a second umbrella skirt is arranged in the middle of the outer surface of the lower shell.
Preferably, a metal insert is arranged at the top end of the inner cavity of the upper shell, and the static end of the arc extinguishing chamber is overlapped with the insert.
Preferably, a nut is fixed at the upper end of the outer surface of the upper shell, and the static end of the arc extinguishing chamber passes through the nut.
Preferably, a plurality of reinforcing ribs are circumferentially arranged at the upper end of the outer surface of the upper shell, and the plurality of reinforcing ribs surround the periphery of the nut.
Preferably, the outer surface of the lower case is provided with a plurality of grooves around a circle of the wire outlet hole.
Preferably, the inner cavity wall of the lower shell is provided with a partial discharge sensor.
Preferably, a plurality of connecting lugs are arranged on the outer edge of the bottom surface of the lower shell, connecting holes are respectively formed in the connecting lugs, threaded inserts are arranged in the connecting holes, and reinforcing ribs are arranged between the connecting lugs and the outer surface of the lower shell.
Preferably, the soft connection is provided with a temperature rise sensor.
Preferably, the insulation pull rod comprises a pull rod body, the pull rod body is in a stepped cylindrical shape with a large upper part and a small lower part, an upper connecting part and a lower connecting part are respectively arranged at the upper end and the lower end of the pull rod body, the upper connecting part penetrates through the outgoing busbar and the flexible connection, and the lower connecting part penetrates out of the lower shell.
Preferably, the outer surface of the pull rod body is provided with a third umbrella skirt.
Preferably, the shell is formed by injection molding of novel engineering plastics.
The utility model provides a normal pressure sealed switch, includes the metal box, the left and right curb plate of box is equipped with three pair of generating line sleeve pipe, three of three-phase circuit breaker are installed to the inner chamber upper portion of box inverted utmost point post and drive mechanism, each the both ends of the female row of being qualified for next round of competitions of utmost point post with a pair of generating line sleeve pipe is connected, the box outside is installed circuit breaker operating mechanism, circuit breaker operating mechanism with three drive mechanism is connected, each drive mechanism with the moving end of the insulating pull rod of utmost point post is connected.
Preferably, the transmission mechanism comprises a main shaft mounted on the box body, one end of the main shaft is connected with the breaker operating mechanism, three guide crank arms are connected to the main shaft, arc-shaped openings are respectively formed in the three guide crank arms, the movable end of each insulation pull rod is respectively connected with a pin shaft, each pin shaft is respectively arranged in each opening in a sliding mode, when the main shaft rotates, the three guide crank arms are driven to rotate, the pin shafts in the openings move along the openings, and accordingly the insulation pull rods drive the arc extinguishing chambers to realize switching on and off.
After the scheme is adopted, the pole for the normal pressure sealing switch and the normal pressure sealing switch have the following beneficial effects:
1. the pole of the invention installs the arc extinguishing chamber and accessories thereof in the inner cavity of the detachable shell, the shell can be formed by adopting novel engineering plastics according to a certain proportion by injection molding, the pole realizes detachable installation and maintenance, the cost is reduced, the ventilation is increased, and the equipment temperature rise is reduced;
2. the arc extinguishing chamber and accessories thereof are arranged in the inner cavity of the detachable shell to form a single-phase insulation isolation structure, so that the inter-phase short circuit of the three-phase circuit breaker is avoided, the reliability is improved, the phase spacing is reduced, and the volume of the cabinet body is reduced;
3. by installing the temperature rise sensor and the partial discharge sensor in the shell, the working condition of the equipment is monitored at any time and is remotely transmitted to staff, the predictability of risks can be improved, and the risk coefficient is reduced;
4. the shell of the pole is formed by injection molding of novel engineering plastics, so that the shell is transparent, the arc extinguishing chamber structure of the inner cavity of the shell can be clearly seen, the installation and inspection by inspection staff are facilitated, the shell is designed into a detachable connecting structure of an upper shell and a lower shell, and the die used for processing the upper shell and the lower shell is small, so that the injection molding, the production, the assembly and the maintenance are facilitated;
5. the normal pressure sealed switch adopts an all-metal box body and an internal normal pressure sealed air insulation type design, the main insulation medium between the electrified conductors and the opposite ground is air, the use is safe, the air pressure in the sealed box body is always the same as the ambient atmospheric pressure, the maintenance is convenient, the switch structure can realize a modularized design, and the operating mechanism, the pole and the transmission mechanism of the circuit breaker are assembled together after being independently installed;
6. the first umbrella skirt is arranged on the outer surface of the upper shell of the pole, the second umbrella skirt is arranged on the outer surface of the lower shell, the electric distance is increased compared with the flat surface, the upper shell and the lower shell are both cylindrical shells, the injection molding is simpler and easier, the electric field is even, the even electric field is more beneficial to the reduction of the electric distance, and the miniaturized design is realized;
7. the transmission mechanism of the normal pressure sealing switch adopts a main shaft to drive three crank arms to act, and the three crank arms drive the insulating pull rods of the three poles to act, so that the three-phase arc extinguishing chamber is separated and combined, and the transmission mechanism has the advantages of fewer adopted parts, high synchronism, low cost and higher reliability.
Drawings
FIG. 1 is a schematic view of a pole for a normal pressure sealed switch in a three-dimensional structure;
FIG. 2 is a schematic diagram of a sectional front view of a pole for a normal pressure sealed switch of the present invention;
FIG. 3 is a schematic view showing the bottom view of the pole for the normal pressure sealed switch of the present invention;
FIG. 4 is a schematic diagram of a schematic cross-sectional front view of an atmospheric pressure sealed switch of the present invention;
fig. 5 is a schematic diagram of the left-hand structure of the atmospheric pressure sealed switch of the present invention.
The invention is further illustrated by the following examples in conjunction with the accompanying drawings;
Detailed Description
As shown in fig. 1 to 3, the pole for the normal pressure sealed switch comprises a shell 1, wherein an arc extinguish chamber 2 is arranged at the upper part of an inner cavity of the shell 1, the lower end of the arc extinguish chamber 2 is connected with an outgoing busbar 4 through a flexible connection 3, the flexible connection 3 and the outgoing busbar 4 are connected with the static end of an insulating pull rod 5, and the movable end of the insulating pull rod 5 penetrates out of the shell 1. The movable end of the arc extinguishing chamber 2 can be switched on or off by the up-and-down action of the insulating pull rod 5. When current flows in from the outgoing busbar 4, the current flows into the arc extinguishing chamber 2 after being gathered into the flexible connection 3.
In order to facilitate installation, the housing 1 is designed to be composed of an upper housing 6 and a lower housing 7, the upper housing 6 and the lower housing 7 are connected in a detachable connection mode, the detachable connection mode of the embodiment is threaded connection, that is, an inner thread is arranged at the lower end of an inner cavity of the upper housing 6, an outer thread is arranged at the upper end of the outer surface of the lower housing 7, and the upper housing 6 and the lower housing 7 are in threaded connection through the inner thread and the outer thread. The left and right sides of the lower part of the lower shell 7 are respectively provided with wire outlet holes 8, and the left and right ends of the wire outlet busbar 4 penetrate out of the two wire outlet holes 8. In this embodiment, the outlet busbar 4 is in a plate shape with a rectangular cross section, and the cross section of the outlet hole 8 is matched with the cross section of the outlet busbar 4. The upper shell 6 and the lower shell 7 of the embodiment are made of novel engineering plastics according to a certain proportion in an injection molding mode. The upper shell 6 and the lower shell 7 are both arranged into cylindrical shells, the injection molding is simpler and easier, the electric field is even, the even electric field is more beneficial to the reduction of the electric distance, and the miniaturized design is realized.
The flexible connection 3 is provided with a temperature rise sensor 11 for sensing the temperature rise inside the housing 1.
The insulating pull rod 5 comprises a pull rod body 12, wherein the pull rod body 12 is in a stepped cylindrical shape with a large upper part and a small lower part, and a third umbrella skirt 13 for increasing the creepage distance is arranged on the outer surface of the pull rod body 12. The upper and lower ends of the pull rod body 12 are respectively provided with an upper connecting part 14 and a lower connecting part 15, the upper connecting part 14 penetrates through the outlet busbar 4 and the flexible connection 3, and the lower connecting part 15 penetrates out of the lower shell 7.
A metal insert 16 is injection molded at the top end of the inner cavity of the upper shell 6, and the static end of the arc extinguishing chamber 2 is overlapped with the insert 16. A metal nut 17 is fixedly mounted on the upper end of the outer surface of the upper housing 6, and in this embodiment, a copper nut 17 is used, and the nut 17 is used for fixing the arc extinguishing chamber 2. The static end of the arc extinguishing chamber 2 is in threaded connection with the nut 17 and penetrates out of the nut 17. The upper end of the outer surface of the upper housing 6 is provided with a plurality of reinforcing ribs 18 in the circumferential direction, and the plurality of reinforcing ribs 18 are wound around the nut 17.
The outer surface of the lower case 7 is provided with a plurality of grooves 19 around the turn of the wire outlet hole 8, which is designed to reduce material, prevent air bubbles from being generated during injection molding, and prevent the casing 1 from being broken. The partial discharge sensor 20 is arranged on the inner cavity wall of the lower shell 7, so that the partial discharge condition of the inner cavity of the shell 1 can be detected in real time. The outer fringe of the bottom surface of lower casing 7 is equipped with a plurality of engaging lugs 21, and this embodiment designs to four and is the equipartition setting. Each connecting lug 21 is respectively provided with a connecting hole, a threaded insert 22 is arranged in the connecting hole and used for fixing the whole pole, and a reinforcing rib 23 is arranged between each connecting lug 21 and the outer surface of the lower shell 7.
As shown in fig. 4 and 5, the atmospheric pressure sealed switch of the present invention includes a metal case 24, and the metal case 24 of the present embodiment is rectangular and welded. The embodiment adopts a 10kV normal pressure sealed air insulation switch cabinet structure type. Three pairs of bus bushings 25 are mounted on the left and right side plates of the metal case 24. The upper part of the inner cavity of the metal box 24 is provided with three-phase poles 26 of the circuit breaker as shown in fig. 1 to 3, and each pole 26 is placed upside down. A transmission mechanism is also mounted on the upper side of the interior of the metal case 24, and the transmission mechanism of this embodiment is located on the upper sides of the three poles 26. The left and right ends of the outgoing busbar 4 of each pole 26 are connected to a pair of busbar bushings 25. The outside of the metal box 24 is provided with a breaker operating mechanism (not shown in the figure), the breaker operating mechanism is connected with three transmission mechanisms, the transmission mechanisms comprise a main shaft 31 arranged on the metal box 24, the inner cavity of the metal box 24 is also connected with a support frame 27, the left end and the right end of the support frame 27 are fixed on the metal box 24, the main shaft 31 penetrates through the support frame 27, and the support frame 27 plays a role in supporting the main shaft 31.
One end of a main shaft 31 is connected with a breaker operating mechanism, three guide crank arms 28 are connected to the main shaft 31, arc-shaped openings 29 are formed in each guide crank arm 28, the three guide crank arms 28 are hinged with the movable ends of the three insulating pull rods 5 extending out of the shell 1 through pin shafts 30, and each pin shaft 30 is arranged in each opening 29.
The breaker operating mechanism drives the main shaft 31 to rotate anticlockwise, the main shaft 31 drives the three guide crank arms 28 to rotate, and as the three guide crank arms 28 are respectively connected with the pin shafts 30 connected to the movable ends of the three insulating pull rods 5 through the openings 29, when the guide crank arms 28 rotate anticlockwise, the pin shafts 30 move along the openings 29, so that the insulating pull rods 5 are driven to move, and the switching-on of the arc extinguishing chambers 2 is realized; when the breaker operating mechanism drives the main shaft 31 to rotate clockwise, the main shaft 31 drives the three guiding crank arms 28 to rotate clockwise, and the pin shaft 30 moves along the opening 29, so that the insulating pull rod 5 is driven to move, and the switching-off of the arc extinguishing chamber 2 is realized.
The pole 26 of the invention installs the arc extinguishing chamber 2 and accessories thereof in the inner cavity of the detachable shell 1, the shell 1 is formed by injection molding novel engineering plastics according to a certain proportion, the pole 26 realizes detachable installation and maintenance, the cost is reduced, the air circulation is increased, and the equipment temperature rise is reduced. The arc extinguishing chamber 2 and accessories thereof are arranged in the inner cavity of the detachable shell 1 to form a single-phase insulation isolation structure, so that interphase short circuit of the three-phase circuit breaker is avoided, the reliability is improved, the phase distance is reduced, and the volume of the cabinet body is reduced. By installing the temperature rise sensor 11 and the partial discharge sensor 20 in the inner cavity of the shell 1, the working condition of equipment is monitored at any time, and the equipment is remotely transmitted to staff, so that the predictability of risks can be improved, and the risk coefficient is reduced. The shell 1 of the pole 26 is formed by injection molding of novel engineering plastics, so that the shell is transparent, the structure of the arc extinguishing chamber 2 in the inner cavity of the shell 1 can be clearly seen, the installation and inspection by inspection staff are facilitated, the shell 1 is designed into a detachable connection structure of the upper shell 6 and the lower shell 7, and the die used for processing the upper shell 6 and the lower shell 7 is small, so that the injection molding, the production, the assembly and the maintenance are facilitated.
The normal pressure sealed switch adopts an all-metal box 24 and an internal normal pressure sealed air insulation type design, the main insulation medium between the electrified conductors and the opposite ground is air, the use is safe, the air pressure in the sealed metal box 24 is always the same as the ambient atmospheric pressure, the maintenance is convenient, the switch structure can realize a modularized design, and the operating mechanism, the pole 26 and the transmission mechanism of the circuit breaker are assembled together after being independently installed. Through set up first umbrella skirt 9 at the last casing 6 surface of utmost point post 26, set up second umbrella skirt 10 at lower casing 7 surface, its more level surface has increased electrical distance, all sets up upper casing 6, lower casing 7 into cylindrical shell, and its injection moulding is simpler easy to the electric field is even, and even electric field is more favorable to electrical distance's reduction, realizes miniaturized design. The transmission mechanism of the normal pressure sealing switch adopts a main shaft 31 to drive three guide crank arms 28 to act, and the three guide crank arms 28 drive the insulating pull rods 5 of the three poles 26 to act, so that the three-phase arc extinguishing chamber 2 is separated and combined, and the transmission mechanism has the advantages of fewer adopted parts, high synchronism, low cost and higher reliability.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solutions of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the design of the present invention.
Claims (13)
1. The normal pressure sealed switch is characterized by comprising a metal box body, wherein three pairs of bus sleeves are arranged on the left side plate and the right side plate of the box body, three inverted poles and transmission mechanisms of a three-phase circuit breaker are arranged at the upper part of an inner cavity of the box body, each pole comprises a shell, an arc extinguishing chamber is arranged at the upper part of the inner cavity of the shell, the lower end of each arc extinguishing chamber is connected with an outgoing bus through flexible connection, the flexible connection and the outgoing bus are connected with the static end of an insulating pull rod, the movable end of the insulating pull rod penetrates out of the shell, the two ends of the outgoing bus of each pole are connected with one pair of bus sleeves, a circuit breaker operation mechanism is arranged at the outer side of the box body and connected with three transmission mechanisms, and each transmission mechanism is connected with the movable end of the insulating pull rod of each pole;
the transmission mechanism comprises a main shaft arranged on the box body, one end of the main shaft is connected with the breaker operating mechanism, three guide crank arms are connected to the main shaft, arc-shaped openings are respectively formed in the three guide crank arms, the movable end of each insulation pull rod is respectively connected with a pin shaft, each pin shaft is respectively arranged in each opening in a sliding mode, when the main shaft rotates, the three guide crank arms are driven to rotate, the pin shafts in the openings move along the openings, and accordingly the insulation pull rods drive the arc extinguishing chambers to achieve switching-on and switching-off.
2. The atmospheric pressure sealed switch of claim 1, wherein the housing comprises an upper shell and a lower shell, the upper shell and the lower shell are connected in a detachable connection manner, the left side and the right side of the lower part of the lower shell are respectively provided with a wire outlet hole, and two ends of the wire outlet busbar penetrate through two wire outlet holes.
3. The atmospheric pressure sealed switch of claim 2, wherein a first umbrella skirt is provided in a middle portion of an outer surface of the upper housing, and a second umbrella skirt is provided in a middle portion of an outer surface of the lower housing.
4. The atmospheric pressure sealed switch of claim 2, wherein a metal insert is disposed at a top end of the inner cavity of the upper housing, and a stationary end of the arc extinguishing chamber is overlapped with the metal insert.
5. The atmospheric pressure sealed switch according to claim 2, wherein a nut is fixed to an upper end of an outer surface of the upper case, and a stationary end of the arc extinguishing chamber passes through the nut.
6. The atmospheric pressure sealed switch according to claim 5, wherein the upper end of the outer surface of the upper case is provided with a plurality of reinforcing ribs in the circumferential direction, and a plurality of the reinforcing ribs are wound around the nut.
7. The atmospheric pressure sealed switch according to claim 2, wherein the outer surface of the lower case is provided with a plurality of grooves around a circle of the wire outlet hole.
8. The atmospheric pressure sealed switch of claim 2, wherein the inner cavity wall of the lower housing is provided with a partial discharge sensor.
9. The atmospheric pressure sealed switch of claim 2, wherein a plurality of connection lugs are provided on the outer edge of the bottom surface of the lower housing, connection holes are provided on each connection lug, threaded inserts are provided in the connection holes, and reinforcing ribs are provided between each connection lug and the outer surface of the lower housing.
10. The atmospheric pressure sealed switch of claim 1, wherein a temperature rise sensor is mounted on the flexible connection.
11. The atmospheric pressure sealed switch of claim 2, wherein the insulating pull rod comprises a pull rod body, the pull rod body is in a stepped cylindrical shape with a large upper part and a small lower part, an upper connecting part and a lower connecting part are respectively arranged at the upper end and the lower end of the pull rod body, the upper connecting part penetrates through the outlet busbar and the flexible connection, and the lower connecting part penetrates out of the lower shell.
12. The atmospheric pressure sealed switch of claim 11, wherein an outer surface of the pull rod body is provided with a third umbrella skirt.
13. The atmospheric pressure sealed switch of claim 1 wherein said housing is injection molded from a novel engineering plastic to provide a transparent color.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111346903.1A CN114256010B (en) | 2021-11-15 | 2021-11-15 | Pole for normal pressure sealing switch and normal pressure sealing switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111346903.1A CN114256010B (en) | 2021-11-15 | 2021-11-15 | Pole for normal pressure sealing switch and normal pressure sealing switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114256010A CN114256010A (en) | 2022-03-29 |
| CN114256010B true CN114256010B (en) | 2024-04-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111346903.1A Active CN114256010B (en) | 2021-11-15 | 2021-11-15 | Pole for normal pressure sealing switch and normal pressure sealing switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114256010B (en) |
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| US5731561A (en) * | 1993-09-24 | 1998-03-24 | Siemens Aktiengesellschaft | Power switch with an ARC quenching device |
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| CN204067175U (en) * | 2014-09-01 | 2014-12-31 | 厦门市凯禹开关有限公司 | The high-pressure vacuum switch pole of a kind of pair of leading-out terminal |
| CN204720378U (en) * | 2015-05-21 | 2015-10-21 | 河北电力装备有限公司 | A kind of sealing insulating polar pole of miniaturization |
| CN205609429U (en) * | 2016-03-25 | 2016-09-28 | 天津平高智能电气有限公司 | Aerify for cabinet heavy current and seal utmost point post admittedly |
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| CN114256010A (en) | 2022-03-29 |
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