CN116667182A - High tension switchgear with earth leakage protection - Google Patents
High tension switchgear with earth leakage protection Download PDFInfo
- Publication number
- CN116667182A CN116667182A CN202310812823.3A CN202310812823A CN116667182A CN 116667182 A CN116667182 A CN 116667182A CN 202310812823 A CN202310812823 A CN 202310812823A CN 116667182 A CN116667182 A CN 116667182A
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- voltage
- rod
- water
- clamping block
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- 238000007789 sealing Methods 0.000 claims abstract description 42
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 254
- 230000002265 prevention Effects 0.000 claims description 13
- 238000007667 floating Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
- H02B1/32—Mounting of devices therein
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/30—Cabinet-type casings; Parts thereof or accessories therefor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/26—Casings; Parts thereof or accessories therefor
- H02B1/50—Pedestal- or pad-mounted casings; Parts thereof or accessories therefor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Abstract
The invention discloses a high-voltage switch cabinet with leakage protection, which comprises a high-voltage cabinet; the high-voltage board includes: the device comprises a cabinet body, a grounding wire, a low-voltage control mechanism, a sealing shell, a leakage protection mechanism, a low-voltage control cabinet door and a sealing cabinet door; a low-pressure control mechanism and a sealing shell are arranged in the cabinet body; the front end face of the cabinet body is rotatably provided with a low-pressure control cabinet door; the low-pressure control cabinet door is used for sealing the low-pressure control mechanism; the rear end face of the cabinet body is rotatably provided with a sealing cabinet door; the sealing cabinet door is used for sealing the sealing shell; the leakage protection mechanism is arranged on the low-pressure control mechanism and the sealing shell; when the high-voltage circuit in the cabinet body is in electric leakage, current is in contact with the conducting strip through air, so that the electromagnet is powered through the conducting framework, when the electromagnet is electrified, the electromagnet attracts down the current connecting piece, and the current connecting piece cuts off the other end of the auxiliary contact of the high-voltage contactor and is electrically connected with the negative electrode of the power supply, so that the power of the low-voltage circuit is cut off.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a high-voltage switch cabinet with leakage protection.
Background
The high-voltage switch cabinet is used for power generation, transmission, distribution, power conversion and consumption of a power system and has the functions of on-off, control or protection and the like. The high-voltage switch cabinet is used as an electrical product with the voltage class of 3.6 kV-550 kV, and the high-voltage isolating switch, the grounding switch, the high-voltage load switch, the high-voltage automatic superposition and sectionalizer, the high-voltage operating mechanism, the high-voltage explosion-proof power distribution device, the high-voltage switch cabinet and the like are large.
The switch cabinet has the functions of overhead incoming and outgoing lines, cable incoming and outgoing lines, bus connection and the like. The method is mainly suitable for various different places such as power plants, transformer substations, petrochemical industry, metallurgical steel rolling, light industry textile, factories and mining enterprises, residential communities, high-rise buildings and the like.
The existing high-voltage switch cabinet does not have the leakage protection function, and when leakage occurs in the high-voltage switch cabinet, the high-voltage switch cabinet body is easy to be electrified; thereby easily causing injury to maintenance personnel.
Disclosure of Invention
In order to solve the problems, the invention provides the high-voltage switch cabinet with the leakage protection, when the high-voltage line in the cabinet body is leaked, current is contacted with the conducting strip through air, so that the electromagnet is powered through the conducting framework, when the electromagnet is electrified, the electromagnet sucks down the current connecting sheet, and the current connecting sheet cuts off the other end of the auxiliary contact of the high-voltage contactor and is electrically connected with the negative electrode of the power supply, so that the low-voltage circuit is powered off, and the high-voltage line is disconnected through the high-voltage contactor, so that casualties caused by leakage are prevented.
The technical scheme adopted by the invention is as follows: a high-voltage switch cabinet with leakage protection comprises a high-voltage cabinet; the high-voltage board includes: the device comprises a cabinet body, a grounding wire, a low-voltage control mechanism, a sealing shell, a leakage protection mechanism, a low-voltage control cabinet door and a sealing cabinet door; the cabinet body is internally provided with a low-pressure control mechanism and a sealing shell; the front end face of the cabinet body is rotatably provided with the low-pressure control cabinet door; the low-pressure control cabinet door is used for sealing the low-pressure control mechanism; the sealing cabinet door is rotatably arranged on the rear end face of the cabinet body; the sealing cabinet door is used for sealing the sealing shell; the leakage protection mechanism is arranged on the low-pressure control mechanism and the sealing shell;
the low pressure control mechanism includes: a power supply, a circuit breaker, a high voltage contactor and a low voltage control housing; the low-pressure control shell is positioned at the front side of the cabinet body; the power supply, the circuit breaker and the high-voltage contactor are arranged in the low-voltage control shell; one end of the auxiliary contact of the high-voltage contactor is electrically connected with the positive electrode of the power supply through the circuit breaker; the other end of the auxiliary contact of the high-voltage contactor is electrically connected with the negative electrode of the power supply through the leakage protection mechanism; one end of the main contact of the high-voltage contactor is electrically connected with one end of a high-voltage line; the other end of the main contact of the high-voltage contactor is electrically connected with the other end of the high-voltage wire.
Preferably, the leakage protection mechanism includes: the device comprises a current connecting sheet, a fixed rod, an elastic piece a, a conductive frame, an electromagnet and a control board; the conductive frame is arranged in the sealed shell; the lower end of the cabinet body is connected with a grounding wire; one end of the electromagnet is connected with the conductive frame; the other end of the electromagnet is connected with the grounding wire; the control panel is positioned between the low-pressure control mechanism and the sealing shell; the lower end of the current connecting sheet is fixedly provided with the fixing rod; the fixed rod is slidably arranged on the control board; the elastic piece a is arranged on the fixed rod; the elastic piece a enables the current connecting piece to be far away from the control board; the current connecting sheet is used for communicating the other end of the auxiliary contact of the high-voltage contactor with the negative electrode of the power supply.
Preferably, an opening mechanism is arranged in the control panel; the opening mechanism includes: the control rod a, the trapezoid block, the clamping block and the elastic piece b; a control rod a is slidably arranged in the control panel; a trapezoid block is arranged on the control rod a; the clamping block is slidably arranged in a hole in the control plate; the clamping block is matched with a clamping hole on the fixing rod; the rear end of the clamping block is provided with an elastic piece b; the trapezoid block drives the clamping block to be separated from the clamping hole on the fixing rod by pushing the control rod a.
Preferably, the device also comprises a low water level water inlet prevention mechanism and a high water level water inlet prevention mechanism;
the lower part of the high-voltage cabinet is sequentially provided with a high water level water inlet prevention mechanism and a low water level water inlet prevention mechanism.
Preferably, the low water level preventing water inlet mechanism includes: the device comprises a water flow barrel, a low water level pipe, a drain pipe, a connecting frame, a buoyancy rod, a shielding plate, a connecting rod, a baffle, a drain rod and a drain plate; the water flow barrel is positioned on the ground; the low water level pipe is an L-shaped rod; one end of the low water level pipe is arranged at the lower part of the water flow barrel; the drain pipe is arranged on the water flow barrel; the drain pipe is communicated with the water flow barrel; the drain pipe is positioned at the opposite side of the low water level pipe; the high-voltage cabinet is arranged on the water flow barrel; the buoyancy rod is positioned in the water flow barrel; a floating block is fixedly arranged at the lower end of the buoyancy rod; the upper end of the buoyancy rod is provided with a connecting frame; and a shielding plate is fixedly arranged at the upper end of the connecting frame.
Preferably, the connecting rod is slidably mounted on the connecting frame; the baffle is arranged at the lower end of the connecting rod; the baffle is slidably mounted within the low water level tube.
Preferably, a drain board is slidably arranged in the drain pipe; and a drain rod is fixedly arranged at the upper end of the drain plate.
Preferably, the high water level preventing water inlet mechanism includes: the water tank, the water tank base, the high water level pipe, the clamping block box and the box body base; the water tank base is fixedly arranged at the bottom of the water flow barrel; the water tank is arranged on the water tank base through an elastic piece c; the high water level pipe is arranged on the water tank base; one end of the high water level pipe is positioned in the water tank; the box base is fixedly arranged at the upper end of the water flow barrel; the clamping block box is arranged in the box body base; a buoyancy base is fixedly arranged at the lower end of the cabinet body; the buoyancy base is clamped in the clamping block box.
Preferably, the upper end of the water tank is provided with a mounting plate; a control rod b is fixedly arranged on the mounting plate; the lower end of the buoyancy base is provided with a connecting block; a slot hole, a clamping block hole and a control rod hole are formed in the clamping block box; the long hole is positioned in the middle of the clamping block box; clamping block holes are formed in two sides of the long hole; control rod holes are formed in two sides of the clamping block hole; the connecting block is slidably arranged in the long hole; the inner slide block in the clamping block hole is provided with a connecting clamping block; the connecting clamping block is clamped with the connecting block; an elastic piece d is arranged between the connecting clamping block and the clamping block hole; a clamping groove is formed in the control rod b; the water tank moves downwards to drive the mounting plate at the upper end of the water tank to move downwards; the mounting plate moves downwards to drive the control rod b to move downwards; the clamping groove on the control rod b drives the connecting clamping block to move, so that the connecting clamping block is separated from the connecting block.
Compared with the prior art, the invention has the beneficial effects that:
1. when the high-voltage line in the cabinet body is in electric leakage, current is in contact with the conducting strip through air, so that the electromagnet is powered by the conducting framework, when the electromagnet is electrified, the current connecting strip is attracted down, and the current connecting strip cuts off the other end of the auxiliary contact of the high-voltage contactor and is electrically connected with the negative electrode of the power supply, so that the low-voltage circuit is powered off, and the high-voltage line is disconnected through the high-voltage contactor, so that casualties caused by electric leakage are prevented.
2. According to the invention, when rainwater is accumulated to a certain height, water flows into the water flow barrel through the low water level pipe, after water enters the water flow barrel, the buoyancy of the water moves the buoyancy rod upwards, and the buoyancy rod drives the connecting frame to move upwards so as to drive the shielding plate to move upwards, so that the water flow is blocked, and the water flow is prevented from submerging the high-voltage cabinet, so that electric leakage is caused.
3. When the accumulated water is too high and exceeds the shielding height of the shielding plate, the high-water-level pipe enters water flow, the water flow flows into the water tank, when the water in the water tank reaches a certain degree, the water tank moves under the action of gravity of the water, so that the mounting plate at the upper end of the water tank is driven to move, the control rod b is driven to move, the connecting clamping block is driven to move by the control rod b, the connecting clamping block is separated from the connecting block, the high-voltage cabinet is separated from the buoyancy base, and the buoyancy of the water floats the buoyancy base, so that the water is not contacted with the high-voltage cabinet.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic diagram of a frame structure of the present invention.
Fig. 3 is a schematic structural diagram of the low-pressure control mechanism of the present invention.
Fig. 4 is a schematic structural diagram of the leakage protection mechanism of the present invention.
Fig. 5 is a schematic view of the structure of the current connecting piece of the invention.
Fig. 6 is a schematic view of a conductive frame structure according to the present invention.
Fig. 7 is a schematic structural diagram of the control board of the present invention.
Fig. 8 is an enlarged partial schematic view at a of the present invention.
Fig. 9 is a schematic view of a shielding plate structure of the present invention.
Fig. 10 is a schematic view of a water flow bucket according to the present invention.
Fig. 11 is a schematic view of a structure of a connecting frame according to the present invention.
Fig. 12 is a schematic view of a base structure of the case of the present invention.
Fig. 13 is a schematic view of the structure of the water tank of the present invention.
Fig. 14 is an enlarged partial schematic view of the present invention at B.
Fig. 15 is a schematic view of a closure flap according to the present invention.
Fig. 16 is a schematic view of a cartridge case according to the present invention.
Reference numerals and signs
A high-voltage cabinet; 20-a low water level water inlet prevention mechanism; 30-a high water level water inlet prevention mechanism; 11-a frame; 12-a buoyancy base; 13-connecting blocks; 14-grounding wire; 15-a low pressure control mechanism; 16-a sealed housing; 17-an earth leakage protection mechanism; 18-a low-pressure control cabinet door; 19-sealing a cabinet door; 121-connecting blocks; 151-power supply; 152-a circuit breaker; 153-high voltage contactor; 154-a low pressure control housing; 171-current connection piece; 172-fixing rod; 173-an elastic member a; 174-conductive frame; 175-an electromagnet; 176-control panel; 1761-control lever a; 1762-trapezoidal block; 1763-a clamping block; 1764-elastic member b; 21-a water flow barrel; 22-low water level pipe; 23-drainage pipe; 24-connecting frames; 25-shielding plate; 26-connecting rods; 27-a baffle; 28-a drain bar; 29-a drain plate; 241-buoyancy bars; 31-a water tank; 32-a water tank base; 33-high water level pipe; 34-a fixture block box; 35-a box base; 341-an elongated hole; 342-a cartridge aperture; 343-a lever aperture; 344-connecting a clamping block; 311-control lever b; 312-closing the shutter.
Detailed Description
The technical scheme of the invention is further specifically described below through examples and with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "front", "rear", "left", "right", etc., are based on directions or positional relationships shown in the drawings, or directions or positional relationships in which the inventive product is conventionally put in use, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention.
It should be noted that in this document, relational terms such as "… … a" and "… … B" or "… … a" and "… … B" and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities or operations.
1-16, a high voltage switchgear with leakage protection, comprising a high voltage cabinet 10; the high-voltage board 10 includes: the cabinet body 11, the grounding wire 14, the low-voltage control mechanism 15, the sealing shell 16, the leakage protection mechanism 17, the low-voltage control cabinet door 18 and the sealing cabinet door 19; a low-pressure control mechanism 15 and a sealing shell 16 are arranged in the cabinet body 11; the front end surface of the cabinet body 11 is rotatably provided with the low-pressure control cabinet door 18; the low-pressure control cabinet door 18 is used for sealing the low-pressure control mechanism 15; the sealing cabinet door 19 is rotatably arranged on the rear end surface of the cabinet body 11; the sealing cabinet door 19 is used for sealing the sealing shell 16; the leakage protection mechanism 17 is arranged on the low-pressure control mechanism 15 and the sealing shell 16;
the low pressure control mechanism 15 includes: a power source 151, a circuit breaker 152, a high voltage contactor 153, and a low voltage control housing 154; the low pressure control housing 154 is located at the front side of the cabinet 11; the power source 151, the circuit breaker 152, and the high voltage contactor 153 are installed in the low voltage control case 154; one end of the auxiliary contact of the high-voltage contactor 153 is electrically connected with the positive electrode of the power supply 151 through the breaker 152; the other end of the auxiliary contact of the high-voltage contactor 153 is electrically connected with the negative electrode of the power supply 151 through the leakage protection mechanism 17; one end of the main contact of the high-voltage contactor 153 is electrically connected with one end of a high-voltage wire; the other end of the main contact of the high-voltage contactor 153 is electrically connected to the other end of the high-voltage line. The low-voltage control circuit is well connected, current flows into the breaker 152 from the positive electrode of the power supply 151 through a wire, current flowing out of the breaker 152 flows into the high-voltage contactor 153, current flowing out of the high-voltage contactor 153 flows into the leakage protection mechanism 17, current flowing out of the leakage protection mechanism 17 flows back to the negative electrode of the power supply 151, when the circuit and the maintenance circuit are required to be installed, the low-voltage control cabinet door 18 is opened, the low-voltage control cabinet door 18 is closed after the work is completed, rubber pads are installed around the low-voltage control cabinet door 18, and the cabinet door can be closed more tightly. The handle of the sealing cabinet door 19 is rotated to drive the clamping block to rotate, so that the sealing cabinet door 19 is tightly installed on the high-voltage cabinet.
The earth leakage protection mechanism 17 includes: a current connection piece 171, a fixing rod 172, an elastic member a173, a conductive frame 174, an electromagnet 175, and a control board 176; the conductive frame 174 is disposed within the hermetic housing 16; the lower end of the cabinet body 11 is connected with a grounding wire 14; one end of the electromagnet 175 is connected to the conductive frame 174; the other end of the electromagnet 175 is connected with the ground wire 14; the control plate 176 is located between the low pressure control mechanism 15 and the seal housing 16; the fixing rod 172 is fixedly arranged at the lower end of the current connecting sheet 171; the fixed lever 172 is slidably mounted on the control plate 176; the fixed rod 172 is provided with an elastic piece a173; the elastic member a173 moves the current connecting piece 171 away from the control board 176; the current connection piece 171 is used for connecting the other end of the auxiliary contact of the high-voltage contactor 153 with the negative electrode of the power supply.
In another implementation of this embodiment, an opening mechanism is disposed in the control panel 176; the opening mechanism includes: a control rod a1761, a trapezoid block 1762, a clamping block 1763 and an elastic member b1764; a control rod a1761 is slidably mounted in the control panel 176; a trapezoid block 1762 is arranged on the control rod a1761; the latch 1763 is slidably mounted in a hole in the control plate 176; the clamping block 1763 is matched with a clamping hole on the fixed rod 172; the rear end of the clamping block 1763 is provided with an elastic piece b1764; the trapezoid block 1762 drives the clamping block 1763 to be separated from the clamping hole on the fixed rod 172 by pushing the control rod a 1761.
When the high-voltage line in the cabinet body is in electric leakage, current is in contact with the conducting strip through air, so that the electromagnet 175 is powered through the conducting framework 174, after the electromagnet 175 is electrified, the electromagnet 175 sucks down the current connecting piece 171, the current connecting piece 171 cuts off the other end of the auxiliary contact of the high-voltage contactor 153 and is electrically connected with the negative electrode of the power supply 151, so that the low-voltage circuit is powered off, the high-voltage line is disconnected through the high-voltage contactor 153, casualties caused by electric leakage are prevented, the current connecting piece 171 moves to drive the fixing rod 172 to move, after the fixing rod 172 moves to a designated position, the clamping block 1763 is clamped into a clamping hole on the fixing rod 172, the fixing rod 172 is clamped, after the electromagnet 175 is prevented from being powered off, the current connecting piece 171 can restore to the original position, the low-voltage circuit is connected, after the electric leakage line maintenance is completed, the clamping block 1763 is pushed back through a trapezoid 1762 on the control rod a1761, so that the clamping block 1763 is separated from the clamping hole on the fixing rod 172, and a reset spring can be arranged on the control rod a1761; the control rod a1761 returns to the original position under the action of the return spring; the fixing lever 172 moves back to the original position, and the current connecting piece 171 moves back to the original position, so that the low-voltage circuit is connected.
In another implementation of the present embodiment, the water inlet prevention mechanism 20 for low water level and the water inlet prevention mechanism 30 for high water level are further included;
the lower part of the high-voltage cabinet 10 is provided with a high water level water inlet prevention mechanism 30 and a low water level water inlet prevention mechanism 20 in sequence.
The low water level preventing water intake mechanism 20 includes: the water flow barrel 21, the low water level pipe 22, the drain pipe 23, the connecting frame 24, the buoyancy rod 241, the shielding plate 25, the connecting rod 26, the shielding plate 27, the drain rod 28 and the drain plate 29; the water flow barrel 21 is positioned on the ground; the low water level pipe 22 is an L-shaped rod; one end of the low water level pipe 22 is installed at the lower portion of the water flow tub 21; the drain pipe 23 is arranged on the water flow barrel 21; the drain pipe 23 is communicated with the water flow barrel 21; the drain pipe 23 is positioned at the opposite side of the low water level pipe 22; the high-voltage cabinet 10 is arranged on the water flow barrel 21; the buoyancy rod 241 is positioned in the water flow bucket 21; a floating block is fixedly arranged at the lower end of the buoyancy rod 241; the upper end of the buoyancy rod 241 is provided with a connecting frame 24; a shielding plate 25 is fixedly arranged at the upper end of the connecting frame 24.
The connecting rod 26 is slidably mounted on the connecting frame 24; the baffle 27 is arranged at the lower end of the connecting rod 26; the baffle 27 is slidably mounted within the low water line 22.
In another implementation of this embodiment, a drain plate 29 is slidably mounted in the drain pipe 23; a drain rod 28 is fixedly arranged at the upper end of the drain plate 29.
When rainwater is accumulated to a certain height, water flows into the water flow barrel 21 through the low water level pipe 22, the buoyancy of the water moves the buoyancy rod 241 upwards after the water flows into the water flow barrel 21, the buoyancy rod 241 drives the connecting frame 24 to move upwards so as to drive the shielding plate 25 to move upwards, thereby blocking the water flow and preventing the water flow from flooding the high-voltage cabinet 10, causing electric leakage, when the buoyancy rod 241 is lifted to a certain position, the buoyancy rod 241 pushes the connecting frame 24 to move upwards so as to drive the connecting rod 26 to move upwards, thereby closing the low water level pipe 22 and preventing too much water entering into the water flow barrel 21 from causing water leakage. When the accumulated water on the ground is drained, the water draining rod 28 is pulled up, the water draining plate 29 is driven to move upwards, the water draining pipe 23 is opened, water in the water flow barrel 21 is drained, the buoyancy rod 241 is lowered, and the shielding plate 25 is restored to the original position, so that the water draining device is convenient to use next time.
In another implementation of this embodiment, the high water level preventing water inlet mechanism 30 includes: the water tank 31, the water tank base 32, the high water level pipe 33, the fixture block box 34 and the tank body base 35; the water tank base 32 is fixedly arranged at the bottom of the water flow barrel 21; the water tank 31 is mounted on the water tank base 32 through an elastic member c; the high water level pipe 33 is installed on the water tank base 32; one end of the high water level pipe 33 is positioned in the water tank 31; the box base 35 is fixedly arranged at the upper end of the water flow barrel 21; the clamping block box 34 is arranged in the box body base 35; the lower end of the cabinet body 11 is fixedly provided with a buoyancy base 12; the buoyancy base 12 is clamped in the clamping block box 34.
The upper end of the water tank 31 is provided with a mounting plate; a control rod b311 is fixedly arranged on the mounting plate; a connecting block 121 is arranged at the lower end of the buoyancy base 12; a slot 341, a latch hole 342 and a lever hole 343 are arranged in the latch box 34; the long hole 341 is positioned in the middle of the fixture block box 34; clamping block holes 342 are formed in two sides of the long hole 341; control rod holes 343 are arranged on two sides of the clamping block hole 342; the connection block 121 is slidably mounted in the long hole 341; a connecting clamping block 344 is mounted in the clamping block hole 342 in a sliding manner; the connecting clamping block 344 is clamped with the connecting block 121; an elastic piece d is arranged between the connecting clamping block 344 and the clamping block hole 342; a clamping groove is formed in the control rod b311; the water tank 31 moves downwards to drive the mounting plate at the upper end of the water tank 31 to move downwards; the mounting plate moves downwards to drive the control rod b311 to move downwards; the locking groove on the control rod b311 drives the connecting locking block 344 to move, so that the connecting locking block 344 is separated from the connecting block 121. Wherein, the side of the water tank is also provided with a closing baffle 312; the closing baffle 312 is slidably mounted within the high water line 33; the side of the water tank is also provided with a water tank drain pipe; the water tank drain pipe is communicated with the water tank; the drain plate 29 is slidably mounted in the tank drain;
when the accumulated water is too high, and exceeds the shielding height of the shielding plate 25, the high water level pipe 33 enters water flow, the water flow flows into the water tank 31, when the water in the water tank 31 reaches a certain degree, the water tank 31 moves under the action of the gravity of the water, so as to drive the mounting plate at the upper end of the water tank 31 to move, then drive the control rod b311 to move, the control rod b311 drives the connecting clamping block 344 to move, so that the connecting clamping block 344 is separated from the connecting block 121, the high-voltage cabinet 10 is separated from the buoyancy base 12, the buoyancy of the water floats the buoyancy base 12, so that the water is not contacted with the high-voltage cabinet 10, and when the water tank 31 moves, the water tank 31 drives the closing baffle 312 to move downwards so as to close the high water level pipe 33, prevent the high water level pipe 33 from entering a large amount of water to cause water in the water tank 31 to overflow, after the accumulated water is removed, the water drain rod 28 is pulled up, then the water drain plate 29 is driven to move upwards so as to open a water tank drain pipe, thereby discharging the water in the water tank 31, after the water in the water tank 31 is discharged, the water tank 31 is restored to the principle position under the action of the elastic piece c, after the water is discharged, the water drain rod 28 is released, the water drain plate 29 is restored to the original state under the action of the spring, and the connecting block 121 arranged under the high-voltage cabinet 10 is inserted into the long hole 341 of the fixture block box 34; the connecting fixture block 344 is clamped with the connecting block 121, so that the high-voltage cabinet 10 is connected with the buoyancy base 12, and the next use is convenient.
Working principle: in the use of the present invention,
the low-voltage control circuit is well connected, current flows into the breaker 152 from the positive electrode of the power supply 151 through a wire, current flowing out of the breaker 152 flows into the high-voltage contactor 153, current flowing out of the high-voltage contactor 153 flows into the leakage protection mechanism 17, current flowing out of the leakage protection mechanism 17 flows back to the negative electrode of the power supply 151, when the circuit and the maintenance circuit are required to be installed, the low-voltage control cabinet door 18 is opened, the low-voltage control cabinet door 18 is closed after the work is completed, rubber pads are installed around the low-voltage control cabinet door 18, and the cabinet door can be closed more tightly. The handle of the sealing cabinet door 19 is rotated to drive the clamping block to rotate, so that the sealing cabinet door 19 is tightly installed on the high-voltage cabinet.
When the high-voltage circuit leaks electricity, the current is contacted with the conducting strip through air, so that the electromagnet 175 is powered by the conducting framework 174, after the electromagnet 175 is electrified, the electromagnet 175 sucks down the current connecting strip 171, the current connecting strip 171 cuts off the other end of the auxiliary contact of the high-voltage contactor 153 and is electrically connected with the negative electrode of the power supply 151, so that the low-voltage circuit is powered off, the high-voltage line is disconnected through the high-voltage contactor 153, the loss of life caused by electricity leakage is prevented, the current connecting strip 171 moves to drive the fixing rod 172 to move, after the fixing rod 172 moves to a designated position, the clamping block 1763 is clamped into a clamping hole on the fixing rod 172, the fixing rod 172 is clamped, after the electromagnet 175 is prevented from being powered off, the current connecting strip 171 can restore to the original position, the low-voltage circuit is connected, after the maintenance of the leakage circuit is completed, the control rod a1761 is pressed down, the clamping block 1763 is pushed back through a trapezoid block 1762 on the control rod a1, so that the clamping block 1763 is separated from the clamping hole on the fixing rod 172, and a reset spring can be arranged on the control rod a1761; the control rod a1761 returns to the original position under the action of the return spring; the fixing lever 172 moves back to the original position, and the current connecting piece 171 moves back to the original position, so that the low-voltage circuit is connected.
When rainwater is accumulated to a certain height, water flows into the water flow barrel 21 through the low water level pipe 22, the buoyancy of the water moves the buoyancy rod 241 upwards after the water flows into the water flow barrel 21, the buoyancy rod 241 drives the connecting frame 24 to move upwards so as to drive the shielding plate 25 to move upwards, thereby blocking the water flow and preventing the water flow from flooding the high-voltage cabinet 10, causing electric leakage, when the buoyancy rod 241 is lifted to a certain position, the buoyancy rod 241 pushes the connecting frame 24 to move upwards so as to drive the connecting rod 26 to move upwards, thereby closing the low water level pipe 22 and preventing too much water entering into the water flow barrel 21 from causing water leakage. When the accumulated water on the ground is drained, the water draining rod 28 is pulled up, the water draining plate 29 is driven to move upwards, the water draining pipe 23 is opened, water in the water flow barrel 21 is drained, the buoyancy rod 241 is lowered, and the shielding plate 25 is restored to the original position, so that the water draining device is convenient to use next time.
When the accumulated water is too high, and exceeds the shielding height of the shielding plate 25, the high water level pipe 33 enters water flow, the water flow flows into the water tank 31, when the water in the water tank 31 reaches a certain degree, the water tank 31 moves under the action of the gravity of the water, so as to drive the mounting plate at the upper end of the water tank 31 to move, then drive the control rod b311 to move, the control rod b311 drives the connecting clamping block 344 to move, so that the connecting clamping block 344 is separated from the connecting block 121, the high-voltage cabinet 10 is separated from the buoyancy base 12, the buoyancy of the water floats the buoyancy base 12, so that the water is not contacted with the high-voltage cabinet 10, and when the water tank 31 moves, the water tank 31 drives the closing baffle 312 to move downwards so as to close the high water level pipe 33, prevent the high water level pipe 33 from entering a large amount of water to cause water in the water tank 31 to overflow, after the accumulated water is removed, the water drain rod 28 is pulled up, then the water drain plate 29 is driven to move upwards so as to open a water tank drain pipe, thereby discharging the water in the water tank 31, after the water in the water tank 31 is discharged, the water tank 31 is restored to the principle position under the action of the elastic piece c, after the water is discharged, the water drain rod 28 is released, the water drain plate 29 is restored to the original state under the action of the spring, and the connecting block 121 arranged under the high-voltage cabinet 10 is inserted into the long hole 341 of the fixture block box 34; the connecting fixture block 344 is clamped with the connecting block 121, so that the high-voltage cabinet 10 is connected with the buoyancy base 12, and the next use is convenient.
Claims (9)
1. The utility model provides a high tension switchgear with earth leakage protection which characterized in that: comprises a high-voltage cabinet (10); the high-voltage board (10) comprises: the cabinet body (11), the grounding wire (14), the low-voltage control mechanism (15), the sealing shell (16), the leakage protection mechanism (17), the low-voltage control cabinet door (18) and the sealing cabinet door (19); a low-pressure control mechanism (15) and a sealing shell (16) are arranged in the cabinet body (11); the front end surface of the cabinet body (11) is rotatably provided with the low-pressure control cabinet door (18); the low-pressure control cabinet door (18) is used for sealing the low-pressure control mechanism (15); the sealing cabinet door (19) is rotatably arranged on the rear end surface of the cabinet body (11); the sealing cabinet door (19) is used for sealing the sealing shell (16); the leakage protection mechanism (17) is arranged on the low-pressure control mechanism (15) and the sealing shell (16);
the low pressure control mechanism (15) includes: a power supply (151), a circuit breaker (152), a high voltage contactor (153) and a low voltage control housing (154); the low-pressure control shell (154) is positioned at the front side of the cabinet body (11); the power supply (151), the circuit breaker (152) and the high-voltage contactor (153) are installed in the low-voltage control housing (154); one end of an auxiliary contact of the high-voltage contactor (153) is electrically connected with the positive electrode of the power supply (151) through the circuit breaker (152); the other end of the auxiliary contact of the high-voltage contactor (153) is electrically connected with the negative electrode of the power supply (151) through the leakage protection mechanism (17); one end of the main contact of the high-voltage contactor (153) is electrically connected with one end of a high-voltage line; the other end of the main contact of the high-voltage contactor (153) is electrically connected with the other end of the high-voltage line.
2. A high voltage switchgear with earth leakage protection according to claim 1, characterized in that: the earth leakage protection mechanism (17) comprises: a current connecting sheet (171), a fixing rod (172), an elastic piece a (173), a conductive frame (174), an electromagnet (175) and a control board (176); the conductive frame (174) is disposed within the sealed housing (16); the lower end of the cabinet body (11) is connected with a grounding wire (14); one end of the electromagnet (175) is connected with the conductive frame (174); the other end of the electromagnet (175) is connected with the grounding wire (14); the control plate (176) is positioned between the low pressure control mechanism (15) and the seal housing (16); the lower end of the current connecting sheet (171) is fixedly provided with the fixing rod (172); the fixed rod (172) is slidably mounted on the control plate (176); the fixed rod (172) is provided with an elastic piece a (173); the elastic piece a (173) enables the current connecting piece (171) to be far away from the control board (176); the current connecting sheet (171) is used for communicating the other end of the auxiliary contact of the high-voltage contactor (153) with the power supply negative electrode.
3. A high voltage switchgear with earth leakage protection according to claim 2, characterized in that: an opening mechanism is arranged in the control panel (176); the opening mechanism includes: a control lever a (1761), a trapezoid block (1762), a clamp block (1763) and an elastic member b (1764); a control rod a (1761) is slidably arranged in the control panel (176); a trapezoid block (1762) is arranged on the control rod a (1761); the latch (1763) is slidably mounted in a hole in the control board (176); the clamping block (1763) is matched with a clamping hole on the fixed rod (172); the rear end of the clamping block (1763) is provided with an elastic piece b (1764); the trapezoid block (1762) drives the clamping block (1763) to be separated from the clamping hole on the fixed rod (172) by pushing the control rod a (1761).
4. A high voltage switchgear with earth leakage protection according to claim 3, characterized in that: the water inlet preventing mechanism (20) for low water level and the water inlet preventing mechanism (30) for high water level are also included;
the lower part of the high-voltage cabinet (10) is sequentially provided with a high water level water inlet prevention mechanism (30) and a low water level water inlet prevention mechanism (20).
5. A high voltage switchgear with earth leakage protection according to claim 4, characterized in that: the low water level prevention water intake mechanism (20) includes: the water flow barrel (21), the low water level pipe (22), the drain pipe (23), the connecting frame (24), the buoyancy rod (241), the shielding plate (25), the connecting rod (26), the shielding plate (27), the drain rod (28) and the drain plate (29); the water flow barrel (21) is positioned on the ground; the low water level pipe (22) is an L-shaped rod; one end of the low water level pipe (22) is arranged at the lower part of the water flow barrel (21); the drain pipe (23) is arranged on the water flow barrel (21); the drain pipe (23) is communicated with the water flow barrel (21); the drain pipe (23) is positioned at the opposite side of the low water level pipe (22); the high-voltage cabinet (10) is arranged on the water flow barrel (21); the buoyancy rod (241) is positioned in the water flow barrel (21); a floating block is fixedly arranged at the lower end of the buoyancy rod (241); the upper end of the buoyancy rod (241) is provided with a connecting frame (24); the upper end of the connecting frame (24) is fixedly provided with a shielding plate (25).
6. A high voltage switchgear with earth leakage protection according to claim 5, characterized in that: the connecting rod (26) is slidably mounted on the connecting frame (24); the baffle (27) is arranged at the lower end of the connecting rod (26); the baffle (27) is slidably mounted within the low water level pipe (22).
7. A high voltage switchgear with earth leakage protection according to claim 5, characterized in that: a drain plate (29) is slidably arranged in the drain pipe (23); a drain rod (28) is fixedly arranged at the upper end of the drain plate (29).
8. A high voltage switchgear with earth leakage protection according to claim 5, characterized in that: the high water level preventing water inlet mechanism (30) includes: the water tank (31), the water tank base (32), the high water level pipe (33), the clamping block box (34) and the box body base (35); the water tank base (32) is fixedly arranged at the bottom of the water flow barrel (21); the water tank (31) is arranged on the water tank base (32) through an elastic piece c; the high water level pipe (33) is arranged on the water tank base (32); one end of the high water level pipe (33) is positioned in the water tank (31); the box body base (35) is fixedly arranged at the upper end of the water flow barrel (21); the clamping block box (34) is arranged in the box body base (35); a buoyancy base (12) is fixedly arranged at the lower end of the cabinet body (11); the buoyancy base (12) is clamped in the clamping block box (34).
9. The high voltage switchgear with earth leakage protection of claim 8 wherein: the upper end of the water tank (31) is provided with a mounting plate; a control rod b (311) is fixedly arranged on the mounting plate; the lower end of the buoyancy base (12) is provided with a connecting block (121); a slot hole (341), a clamping block hole (342) and a control rod hole (343) are arranged in the clamping block box (34); the long hole (341) is positioned in the middle of the clamping block box (34); clamping block holes (342) are formed in two sides of the long hole (341); control rod holes (343) are formed in two sides of the clamping block holes (342); the connecting block (121) is slidably mounted in the long hole (341); a connecting clamping block (344) is arranged on the inner sliding block of the clamping block hole (342); the connecting clamping block (344) is clamped with the connecting block (121); an elastic piece d is arranged between the connecting clamping block (344) and the clamping block hole (342); a clamping groove is formed in the control rod b (311); the water tank (31) is moved downwards to drive the mounting plate at the upper end of the water tank (31) to move downwards; the mounting plate moves downwards to drive the control rod b (311) to move downwards; the clamping groove on the control rod b (311) drives the connecting clamping block (344) to move, so that the connecting clamping block (344) is separated from the connecting block (121).
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| CN202310812823.3A CN116667182B (en) | 2023-07-05 | 2023-07-05 | High tension switchgear with earth leakage protection |
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| CN202310812823.3A CN116667182B (en) | 2023-07-05 | 2023-07-05 | High tension switchgear with earth leakage protection |
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