CN116864336A - Short-circuit protection switch for high-voltage cable - Google Patents
Short-circuit protection switch for high-voltage cable Download PDFInfo
- Publication number
- CN116864336A CN116864336A CN202310756953.XA CN202310756953A CN116864336A CN 116864336 A CN116864336 A CN 116864336A CN 202310756953 A CN202310756953 A CN 202310756953A CN 116864336 A CN116864336 A CN 116864336A
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- CN
- China
- Prior art keywords
- box body
- sliding
- slide
- latch
- switch
- 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
- 238000005192 partition Methods 0.000 claims abstract description 47
- 238000009423 ventilation Methods 0.000 claims description 4
- 230000003020 moisturizing effect Effects 0.000 claims 2
- 238000001816 cooling Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 8
- 230000017525 heat dissipation Effects 0.000 abstract description 7
- 230000008033 biological extinction Effects 0.000 abstract description 4
- 238000009413 insulation Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
- H01H21/54—Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch
-
- 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
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/52—Cooling of switch parts
Landscapes
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a high-voltage cable short-circuit protection switch, which comprises a box body and a connector, wherein the connector is fixedly connected in the box body and is also connected with a cable; the inner cavity of the box body above the sliding cylinder is filled with high-pressure gas for standby, and the box body can be rapidly disconnected when the brake is opened. The electric brake is not required to be opened manually by electricians, and the electric brake is quick and safe. And the sliding cylinder automatically decelerates after sliding downwards for a certain distance, so that the kinetic energy of the sliding cylinder is released, and collision is avoided. The space where the knife switch and the connector are located is filled with cooling oil, so that the heat dissipation effect is achieved, arc extinction and insulation can be achieved, and electric leakage is prevented. If the situation of poor contact and the like causes overheat, the cooling oil expands to push the sliding partition plate to move downwards, so that the knife switch is disconnected or away from the connector, and the function of automatic power-off protection is achieved.
Description
Technical Field
The invention relates to the field of high-voltage circuit breakers, in particular to a high-voltage cable short-circuit protection switch.
Background
High-voltage cables transmitted by electricity in general residential areas, factories and the like have high voltage and power, and once short circuits and the like occur, serious consequences are easily caused if the high-voltage cables cannot be disconnected in time.
The switch of the high-voltage cable generally needs great force to open and close, and when a short circuit condition occurs, the cable switch is easy to have potential safety hazards, so that electricians need to take extra care in operation. The knife is not completely disconnected when the switch is opened or the gap between the knife and the connecting part is smaller after the switch is opened, so that the break-over is dangerous, electric leakage is caused, excessive heat is easily generated, and even fire is caused.
Disclosure of Invention
The invention aims to provide a high-voltage cable short-circuit protection switch, which is characterized in that the inner cavity of a box body above a sliding cylinder is filled with high-pressure gas for standby, and the high-voltage cable short-circuit protection switch can be rapidly disconnected when the switch is opened. The electric brake is not required to be opened manually by electricians, and the electric brake is quick and safe. And the sliding cylinder automatically decelerates after sliding downwards for a certain distance, so that the kinetic energy of the sliding cylinder is released, and collision is avoided. The space where the knife switch and the connector are located is filled with cooling oil, so that the heat dissipation effect is achieved, arc extinction and insulation can be achieved, and electric leakage is prevented. If the situation of poor contact and the like causes overheat, the cooling oil expands to push the sliding partition plate to move downwards, so that the knife switch is disconnected or away from the connector, and the function of automatic power-off protection is achieved.
The high-voltage cable short-circuit protection switch comprises a box body and a connector, wherein the connector is fixedly connected in the box body and is also connected with a cable;
the novel switch is characterized in that a sliding cylinder, a switch blade, a fixed partition plate and a sliding partition plate are arranged in the box body, the sliding cylinder is slidably connected in the box body, the fixed partition plate is fixedly connected in the box body and located between the sliding cylinder and the connector, the switch blade is fixedly connected with the sliding cylinder through a connecting rod, the connecting rod is slidably connected with the fixed partition plate, and the sliding partition plate is slidably connected in the box body and is fixedly connected with the switch blade through the connecting rod.
The box body is characterized in that a brake-opening locking assembly and an exhaust pipe are further arranged on the side wall of the box body, the brake-opening locking assembly is connected with the sliding cylinder in a matched mode, the exhaust pipe is communicated with the box body cavity above the sliding cylinder, a radiating fin is further fixedly connected to the box body side wall below the switch blade, an insulating sliding plate is further connected to the box body below the sliding partition plate in a sliding mode, and a ventilation opening is further formed in the box body side wall between the sliding partition plate and the insulating sliding plate.
Preferably, the upper end of box body is equipped with the air filling pipe, air filling pipe and the box body inner chamber intercommunication of slide upper portion, the lower extreme sliding connection of box body has the closing push rod, the outer end of closing push rod is located the box body outward, and the inner and the insulating slide fixed connection of closing push rod.
Preferably, the outer end of the opening locking assembly is fixedly connected with a gas pipe, the gas pipe is communicated with a gas pressure chamber in the opening locking assembly, a piston latch is slidably connected in the gas pressure chamber, a latch spring is further arranged in the gas pressure chamber outside the piston latch, two ends of the latch spring are respectively connected to the opening locking assembly and the piston latch, latch holes matched with the piston latch are formed in the box body, latch grooves matched with the piston latch are formed in the sliding barrel, and through holes are further formed in the sliding barrel and are communicated with the latch grooves and the inner cavity of the box body.
Preferably, the exhaust pipe is connected with an exhaust pipe partition plate in a sliding manner, a partition plate spring is connected between the upper end of the exhaust pipe partition plate and the exhaust pipe, the lower end of the exhaust pipe partition plate is fixedly connected with a slide rod, the lower end of the slide rod penetrates through the exhaust pipe and the brake opening locking assembly to be located in an air pressure chamber behind the piston clamping bolt, and a through hole is formed in the exhaust pipe partition plate.
Preferably, the piston strip is connected in a sliding manner in the radiating fins, a stop block is fixedly connected at the inner outlet of the radiating fins, and micropores are formed in the outer end walls of the radiating fins.
Preferably, the outer end of the closing push rod is movably connected with a handle, the lower end of the handle is rotationally connected with a fixed seat, and the fixed seat is fixedly connected with the lower end of the box body.
The invention has the advantages that: 1. the inner cavity of the box body above the sliding cylinder is filled with high-pressure gas for standby, and when an accident occurs, the sliding cylinder can rapidly slide down under the air pressure only by releasing the sliding cylinder, so that the knife switch is driven to rapidly disconnect from the connector. The electric brake is not required to be opened manually by electricians, and the electric brake is quick and safe.
2. After the sliding cylinder slides downwards for a certain distance, the air supplementing pipe can be automatically opened under the action of a special mechanism to release high-pressure air in the inner cavity of the box body above the sliding cylinder, so that the sliding cylinder is decelerated, the kinetic energy of the sliding cylinder is released, and collision is avoided.
3. The space where the knife switch and the connector are located is filled with cooling oil, and the cooling oil is matched with the cooling fins, so that the heat dissipation effect is achieved, arc extinction and insulation can be realized, and electric leakage is prevented.
4. If the situation such as poor contact causes overheat, then the cooling oil expansion promotes the sliding partition board to move downwards, can make the plug-in strip further keep away from the connector, plays automatic outage protection's effect.
Drawings
FIG. 1 is a schematic view of the overall structure of the device of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the device of the present invention during closing;
FIG. 3 is a schematic diagram of the device of the present invention in the open state;
FIG. 4 is a schematic diagram of the apparatus of the present invention after opening the brake;
FIG. 5 is an enlarged view of portion A of FIG. 2;
FIG. 6 is an enlarged view of portion B of FIG. 3;
FIG. 7 is an enlarged view of portion C of FIG. 4;
wherein, 01, the cable. 02. The connector, 11, the box body, 12, the air supplementing pipe, 13, the closing push rod, 14, the sliding cylinder, 15, the connecting rod, 16, the knife switch, 17, the fixed partition plate, 18, the sliding partition plate, 19, the opening locking component, 20, the exhaust pipe, 21, the radiating fin, 22, the ventilation port, 23, the handle, 24, the fixed seat, 25, the insulating slide plate, 26, the ejector rod, 110, the clamping bolt hole, 140, the clamping bolt groove, 141, the through hole, 190, the air pressure chamber, 191, the air delivery pipe, 192, the piston clamping bolt, 193, the clamping bolt spring, 201, the slide rod, 202, the exhaust pipe partition plate, 203, the through hole, 204, the partition plate spring, 211, the piston strip, 212 and the stop block.
Detailed Description
The invention is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the invention easy to understand.
As shown in fig. 1 to 7, the invention comprises a box body 11 and a connector 02, wherein the connector 02 is fixedly connected in the box body 11, and the connector 02 is also connected with a cable 01; the upper end of box body 1 is equipped with the air make-up pipe 12, air make-up pipe 12 and the box body 1 inner chamber intercommunication of slide 14 top, the lower extreme sliding connection of box body 1 has closing push rod 13, closing push rod 13's outer end is located box body 1 outward, and closing push rod 13's inner and insulating slide 25 fixed connection. The outer end of the closing push rod 13 is movably connected with a handle 23, the lower end of the handle 23 is rotatably connected with a fixed seat 24, the fixed seat 24 is fixedly connected with the lower end of the box body 1, and the insulating sliding plate 25 is also connected with a push rod 26.
When the switch is opened, the switch is opened rapidly and automatically by air pressure, and when the switch is closed, the switch-on push rod 13 is pushed manually by the handle 23, so that the switch blade 16 moves upwards to finally reclose.
The key point is that a sliding cylinder 14, a knife switch 16, a fixed partition 17 and a sliding partition 18 are arranged in the box body 11, the sliding cylinder 14 is slidably connected in the box body 11, the fixed partition 17 is fixedly connected in the box body 11 and is positioned between the sliding cylinder 14 and the connector 02, the knife switch 16 is fixedly connected with the sliding cylinder 14 through a connecting rod 15, the connecting rod 15 is slidably connected with the fixed partition 17, and the sliding partition 18 is slidably connected in the box body 11 and is fixedly connected with the knife switch 16 through the connecting rod 15. The side wall of the box body 1 is also provided with a brake-off locking assembly 19 and an exhaust pipe 20, the brake-off locking assembly 19 is connected with the sliding cylinder 14 in a matched mode, the exhaust pipe 20 is communicated with the inner cavity of the box body 1 above the sliding cylinder 14, the side wall of the box body 1 below the knife switch 16 is also fixedly connected with a radiating fin 21, the box body 11 below the sliding partition 18 is also connected with an insulating sliding plate 25 in a sliding mode, and a ventilation port 22 is further formed in the side wall of the box body 1 between the sliding partition 18 and the insulating sliding plate 25. The brake release locking assembly 19 functions to lock the slide 14 at ordinary times.
The inner cavity of the box body 1 above the slide cylinder 14 is also filled with compressed gas, so after the opening locking assembly 19 is opened, the slide cylinder 14 can slide down rapidly after being released, the slide cylinder 14 slides down rapidly to drive the knife 16 to slide down through the connecting rod 15, the knife 16 is separated from the connector 02, and the opening purpose is achieved.
The outer end of the opening locking assembly 19 is fixedly connected with an air pipe 191, the air pipe 191 is communicated with an air pressure chamber 190 in the opening locking assembly 19, a piston latch 192 is connected in the air pressure chamber 190 in a sliding manner, a latch spring 193 is further arranged in the air pressure chamber 190 outside the piston latch 192, two ends of the latch spring 193 are respectively connected to the opening locking assembly 19 and the piston latch 192, latch holes 110 matched with the piston latch 192 are formed in the box body 1, latch grooves 104 matched with the piston latch 192 are formed in the slide cylinder 14, through holes 141 are further formed in the slide cylinder 14, and the through holes 141 are communicated with the latch grooves 104 and the inner cavity of the box body 1.
Therefore, the opening locking assembly 19 is opened by only opening the air pipe 191 to release the compressed air in the air pressure chamber 190.
Specifically, an exhaust pipe partition plate 202 is slidably connected to the exhaust pipe 20, a partition spring 204 is connected between the upper end of the exhaust pipe partition plate 202 and the exhaust pipe 20, a slide bar 201 is fixedly connected to the lower end of the exhaust pipe partition plate 202, the lower end of the slide bar 201 passes through the exhaust pipe 20 and the opening locking assembly 19 and is located in the air pressure chamber 190 behind the piston latch 192, and a through hole 203 is formed in the exhaust pipe partition plate 202.
After the brake is opened and the slide cylinder 14 slides down to a certain extent, the latch hole 110 is exposed, the interior of the latch hole 110 is not in negative pressure, so that the piston latch 192 is further retracted to a position, at the moment, the piston latch 192 can jack up the slide rod 201, the slide rod 201 is lifted up to lift up the slide rod 201, the through hole 203 on the exhaust pipe partition plate 202 is communicated with the exhaust pipe 20, the exhaust pipe 20 is communicated, and compressed gas in the inner cavity of the box body 1 above the slide cylinder 14 is released; at this time, the slide cylinder 14 is not driven by air pressure, but is blocked by friction force, so that the slide cylinder is decelerated to a stop, and collision with the fixed partition plate 17 is avoided.
Specifically, the heat dissipation fin 21 is slidably connected with a piston bar 211, and a stop block 212 is fixedly connected at an inner outlet of the heat dissipation fin 21, and micropores are formed on an outer end wall of the heat dissipation fin 21. If after the brake is opened, electric leakage and other phenomena still exist, the cooling oil is heated and expanded to drive the sliding partition plate 18 to slide downwards and the piston strip 211 to move outwards, the sliding partition plate 18 slides downwards to further separate the brake blade 16 from the connector 02, and meanwhile, the piston strip 211 moves outwards to enlarge the contact surface between the cooling oil and the radiating fins 21, so that the radiating effect is improved, and overheating is avoided.
Specific embodiments and principles:
when emergency such as short circuit is encountered, only the air pipe 191 is opened to release the compressed air in the air pressure chamber 190. After the air pressure in the air pressure chamber 190 is reduced, the elastic force of the latch spring 193 is released, and the piston latch 192 is pulled back, so that the piston latch 192 is disengaged from the latch groove 104. The slide cylinder 14 is released, and the inner cavity of the box body 1 above the slide cylinder 14 is filled with compressed gas, so that the slide cylinder 14 can slide down rapidly after being released, the slide cylinder 14 slides down rapidly to drive the knife 16 to slide down through the connecting rod 15, the knife 16 is separated from the connector 02, and the purpose of opening the brake is achieved.
In the above process, although the piston catch 192 is disengaged from the catch groove 104, the piston catch 192 remains in the catch hole 110 in the case 1 because the slide tube 14 blocks the catch hole 110, so that a negative pressure is formed in the catch hole 110, and the back-retraction of the piston catch 192 is restricted and does not retract in place.
After the brake is opened and the slide cylinder 14 slides down to a certain extent, the latch hole 110 is exposed, the interior of the latch hole 110 is not in negative pressure, so that the piston latch 192 is further retracted to a position, at the moment, the piston latch 192 can jack up the slide rod 201, the slide rod 201 is lifted up to lift up the slide rod 201, the through hole 203 on the exhaust pipe partition plate 202 is communicated with the exhaust pipe 20, the exhaust pipe 20 is communicated, and compressed gas in the inner cavity of the box body 1 above the slide cylinder 14 is released; at this time, the slide cylinder 14 is not driven by air pressure, but is blocked by friction force, so that the slide cylinder is decelerated to a stop, and collision with the fixed partition plate 17 is avoided.
The sliding partition 18 slides down synchronously while the sliding cylinder 14 drives the knife 16 to slide down through the connecting rod 15, so that the interval between the sliding partition 18 and the fixed partition 17 becomes larger, and the piston bar 211 in the radiating fin 21 automatically slides inwards to adapt to the volume change of the cooling oil.
If after the brake is opened, electric leakage and other phenomena still exist, the cooling oil is heated and expanded to drive the sliding partition plate 18 to slide downwards and the piston strip 211 to move outwards, the sliding partition plate 18 slides downwards to further separate the brake blade 16 from the connector 02, and meanwhile, the piston strip 211 moves outwards to enlarge the contact surface between the cooling oil and the radiating fins 21, so that the radiating effect is improved, and overheating is avoided.
After the circuit problem is solved, the switching-on push rod 13 is manually pushed by the handle 23, so that the knife 16 moves upwards to finally reclose, and at the moment, the sliding cylinder 14 also completes resetting. Then, the air pipe 191 inflates the air pressure chamber 190 in the opening locking assembly 19, so that the piston latch 192 is pushed forward to be clamped into the latch groove 104 to lock the slide cylinder 14, at this time, the slide rod 201 is released, and the exhaust pipe partition 202 moves downward under the action of the partition spring 204, so that the through hole 203 is plugged again. Finally, the inner cavity of the box body 1 above the slide cylinder 14 is inflated by the air pipe 191 for later use.
Based on the above, the box body cavity above the slide cylinder is filled with high-pressure gas for standby, and the slide cylinder can be rapidly disconnected when the slide cylinder is opened. The electric brake is not required to be opened manually by electricians, and the electric brake is quick and safe. And the sliding cylinder automatically decelerates after sliding downwards for a certain distance, so that the kinetic energy of the sliding cylinder is released, and collision is avoided. The space where the knife switch and the connector are located is filled with cooling oil, so that the heat dissipation effect is achieved, arc extinction and insulation can be achieved, and electric leakage is prevented. If the situation of poor contact and the like causes overheat, the cooling oil expands to push the sliding partition plate to move downwards, so that the knife switch is disconnected or away from the connector, and the function of automatic power-off protection is achieved.
It will be appreciated by those skilled in the art that the present invention can be carried out in other embodiments without departing from the spirit or essential characteristics thereof. Accordingly, the above disclosed embodiments are illustrative in all respects, and not exclusive. All changes that come within the scope of the invention or equivalents thereto are intended to be embraced therein.
Claims (6)
1. The high-voltage cable short-circuit protection switch is characterized by comprising a box body (11) and a connector (02), wherein the connector (02) is fixedly connected in the box body (11), and the connector (02) is also connected with a cable (01);
be equipped with slide (14), knife switch (16), fixed baffle (17) and slip baffle (18) in box body (11), slide (14) sliding connection is in box body (11), fixed baffle (17) fixed connection is in box body (11) to be located between slide (14) and connector (02), knife switch (16) pass through connecting rod (15) and slide (14) fixed connection, just connecting rod (15) and fixed baffle (17) sliding connection, slip baffle (18) sliding connection is in box body (11) to through connecting rod (15) and knife switch (16) fixed connection.
The novel box is characterized in that a brake opening locking assembly (19) and an exhaust pipe (20) are further arranged on the side wall of the box body (1), the brake opening locking assembly (19) is connected with the sliding cylinder (14) in a matched mode, the exhaust pipe (20) is communicated with the inner cavity of the box body (1) above the sliding cylinder (14), radiating fins (21) are further fixedly connected onto the side wall of the box body (1) below the knife switch (16), an insulating sliding plate (25) is further connected into the box body (11) below the sliding partition plate (18) in a sliding mode, and a ventilation opening (22) is further formed in the side wall of the box body (1) between the sliding partition plate (18) and the insulating sliding plate (25).
2. The high voltage cable short circuit protection switch of claim 1, wherein: the upper end of box body (1) is equipped with moisturizing pipe (12), moisturizing pipe (12) and box body (1) inner chamber intercommunication of slide (14) top, the lower extreme sliding connection of box body (1) has closing push rod (13), the outer end of closing push rod (13) is located outside box body (1), and the inner and insulating slide (25) fixed connection of closing push rod (13).
3. The high voltage cable short circuit protection switch of claim 1, wherein: the utility model discloses a pneumatic brake system, including box body (1), switch-off locking assembly (19), pneumatic brake locking assembly (19) outer end fixedly connected with gas-supply pipe (191), gas-supply pipe (191) communicate with pneumatic chamber (190) in switch-off locking assembly (19), sliding connection has piston latch (192) in pneumatic chamber (190), and still be equipped with latch spring (193) in pneumatic chamber (190) in piston latch (192) outside, the both ends of latch spring (193) are connected respectively on switch-off locking assembly (19) and piston latch (192), be equipped with on box body (1) with piston latch (192) matched with latch hole (110), be equipped with on slide (14) with piston latch (192) matched with latch groove (104), still be equipped with through-hole (141) on slide (14), the inner chamber of through-hole (141) intercommunication latch groove (104) and box body (1).
4. A high voltage cable short circuit protection switch according to claim 3, wherein: the utility model discloses a piston lock, including blast pipe (20), blast pipe baffle (202) is connected with in the blast pipe (20) sliding connection, be connected with baffle spring (204) between the upper end of blast pipe baffle (202) and blast pipe (20), and the lower extreme fixedly connected with slide bar (201) of blast pipe baffle (202), the lower extreme of slide bar (201) is passed blast pipe (20) and is opened floodgate locking Assembly (19) and is located pneumatic chamber (190) behind piston lock (192), be equipped with through-hole (203) on blast pipe baffle (202).
5. The high voltage cable short circuit protection switch of claim 1, wherein: the piston rod (211) is connected in a sliding manner to the radiating fins (21), a stop block (212) is fixedly connected to the inner outlet of the radiating fins (21), and micropores are formed in the outer end walls of the radiating fins (21).
6. The high voltage cable short circuit protection switch of claim 1, wherein: the outer end of the closing push rod (13) is movably connected with the handle (23), the lower end of the handle (23) is rotatably connected with the fixing seat (24), and the fixing seat (24) is fixedly connected with the lower end of the box body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310756953.XA CN116864336A (en) | 2023-06-26 | 2023-06-26 | Short-circuit protection switch for high-voltage cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310756953.XA CN116864336A (en) | 2023-06-26 | 2023-06-26 | Short-circuit protection switch for high-voltage cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116864336A true CN116864336A (en) | 2023-10-10 |
Family
ID=88233242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310756953.XA Pending CN116864336A (en) | 2023-06-26 | 2023-06-26 | Short-circuit protection switch for high-voltage cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116864336A (en) |
-
2023
- 2023-06-26 CN CN202310756953.XA patent/CN116864336A/en active Pending
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