CN114597098B - Column type circuit breaker with high-voltage heating - Google Patents
Column type circuit breaker with high-voltage heating Download PDFInfo
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- CN114597098B CN114597098B CN202210335020.9A CN202210335020A CN114597098B CN 114597098 B CN114597098 B CN 114597098B CN 202210335020 A CN202210335020 A CN 202210335020A CN 114597098 B CN114597098 B CN 114597098B
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- 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
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- 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
- H01H71/02—Housings; Casings; Bases; Mountings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
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Abstract
The invention belongs to the technical field of circuit breakers, and relates to a column type circuit breaker with high-voltage heating, which comprises heating equipment, a column type circuit breaker and a control cabinet; the column type circuit breaker comprises a circuit breaker arc extinguishing chamber and a circuit breaker column air chamber; the control cabinet is internally provided with a controller and a power supply, the column type circuit breaker is provided with a temperature sensor, and the temperature sensor and the power supply are connected with the controller; the heating equipment comprises a high-pressure heating loop, a first low-pressure heating air chamber, an insulating air chamber and a high-pressure heating air chamber which are sequentially arranged from bottom to top; the high-pressure heating air chamber is communicated with the arc extinguishing chamber of the circuit breaker; the high-voltage heating loop comprises a power isolation device, a power line, a high-voltage insulation support and a heat supply element which are sequentially connected from bottom to top; a second low-pressure heating air chamber is arranged below the circuit breaker support column; the high-pressure heating loop, the first low-pressure heating air chamber and the second low-pressure heating air chamber are respectively connected with a power supply. Solves the problem that SF6 gas cannot be effectively prevented from being liquefied at low temperature due to the fact that the high-pressure side cannot be directly heated.
Description
Technical Field
The invention belongs to the technical field of circuit breakers, and particularly relates to a column type circuit breaker with high-voltage heating.
Background
In general, a high-voltage circuit breaker filled with insulating gas with a certain pressure generates a low-temperature liquefaction phenomenon at a certain temperature SF6 gas below zero, so that the gas pressure is lower than the working locking pressure, and the normal insulation and breaking characteristics of the high-voltage circuit breaker are also affected. The following solutions are generally adopted.
1) Reducing the use of breaking capacity;
2) The mixed gas of SF6 and N2 is adopted, so that rated parameters of the circuit breaker are kept unchanged;
3) The heating and heat preservation method is adopted to ensure that the liquefaction pressure of SF6 is higher than the SF6 air pressure when the circuit breaker is locked.
The third most economically viable approach is to design the heating means on the circuit breaker structure reasonably and efficiently. When the ambient temperature is reduced to a certain temperature (-25 ℃), the heating device is automatically put into operation to heat SF6 gas in the circuit breaker, so that the problem of low-temperature liquefaction of the SF6 gas in the circuit breaker in severe cold areas is solved.
Generally, 2 methods for using the heating belt of the open circuit breaker are available, one is to heat the heating belt at the shell of the arc extinguishing chamber at the low voltage side of the tank circuit breaker, so that the problem of low-temperature liquefaction of SF6 gas can be effectively solved, but when the system voltage is higher, the price of the tank circuit breaker is more expensive; a pillar-type circuit breaker is heated by a heating belt at a low voltage side, and can effectively solve the problem of SF6 gas low-temperature liquefaction when the voltage is relatively low, but when the system voltage is relatively high, the heating belt at the low voltage side is relatively far away from an arc extinguishing chamber due to the fact that products are relatively high, heat generated at the low voltage side cannot be effectively transferred to the arc extinguishing chamber at the high voltage side, and therefore the problem of SF6 gas low-temperature liquefaction cannot be effectively avoided.
Disclosure of Invention
The invention aims to provide a column type circuit breaker with high-voltage heating, which solves the problem that SF6 gas cannot be effectively prevented from being liquefied at low temperature due to the fact that a high-voltage side cannot be directly heated.
The invention is realized by the following technical scheme:
the column type breaker with the high-voltage heating function comprises a bottom frame, heating equipment and the column type breaker which are arranged on the bottom frame, and a control cabinet which is arranged below the bottom frame; the column type circuit breaker comprises a circuit breaker arc extinguishing chamber and a circuit breaker column air chamber which are connected from top to bottom;
a controller and a power supply are arranged in the control cabinet, a circuit breaker arc extinguishing chamber and a circuit breaker pillar air chamber are provided with temperature sensors, and the temperature sensors are connected with the controller;
the heating equipment comprises a high-pressure heating loop, a first low-pressure heating air chamber, an insulating air chamber and a high-pressure heating air chamber which are sequentially arranged from bottom to top; the first low-pressure heating air chamber is communicated with the insulating air chamber; the high-pressure heating air chamber is communicated with the arc extinguishing chamber of the circuit breaker;
the high-voltage heating loop comprises a power isolation device, a power line, a high-voltage insulation support and a heat supply element which are sequentially connected from bottom to top; the high-voltage insulating support is arranged in the high-voltage heating air chamber;
an insulating sleeve is arranged in the insulating air chamber, a lead pipe is arranged in the insulating sleeve, a power wire penetrates through the lead pipe, one end of the power wire is connected with the power isolation device, the other end of the power wire is connected with the high-voltage insulating support, and the heat supply element is fixedly arranged on the high-voltage insulating support;
a second low-pressure heating air chamber is arranged below the circuit breaker support, and the first low-pressure heating air chamber is communicated with the second low-pressure heating air chamber;
the high-pressure heating loop, the first low-pressure heating air chamber and the second low-pressure heating air chamber are respectively connected with a power supply, and the power supply is connected with the controller.
Further, the high-pressure heating air chamber comprises a high-pressure body shell, a first flange and a second flange;
the high-pressure body shell is a double-layer body shell, and the heat insulation material is filled in the middle of the double-layer body shell or is in a vacuum state;
the high-voltage body shell is connected with the insulating sleeve through a first flange, and the high-voltage body shell is connected with the arc-extinguishing chamber of the circuit breaker through a second flange.
Further, the inner surface of the side of the high-voltage body shell, which is far away from the breaker arc-extinguishing chamber, is provided with a heat reflection coating for radiating the heating gas towards the breaker arc-extinguishing chamber.
Further, the high-voltage insulation support is of a basin-type insulation structure and comprises a fixed flange, an insulation support piece and an intermediate metal flange, wherein the fixed flange and the high-voltage body shell are fixed on the first flange;
the heating element comprises a heating resistor and a blower;
one end of the middle metal flange is fixedly connected with the lead tube through a spring contact finger, and the other end of the middle metal flange is connected with the heating resistor;
a power connection terminal a1 and a power connection terminal n1 are arranged on the middle metal flange, one end of each of the two connection terminals is connected with a power line, and the other end is connected with a heating resistor and the power line of the blower; the power connection terminal a1 is insulated from the middle metal flange through an insulating piece, and the power connection terminal n1 is equipotential with the middle metal flange.
Further, the heating resistor and the blower are matched with the high-pressure body in external shape, the heating resistor is coaxial with the high-pressure body, and the blower is coaxial with the second flange.
Further, heating belts are arranged outside the first low-pressure heating air chamber and the second low-pressure heating air chamber.
Further, a first voltage equalizing shield is arranged at the upper end of the insulating air chamber, and a second voltage equalizing shield is arranged in the first low-pressure heating air chamber;
the second voltage equalizing shield is positioned in the insulating sleeve, positioned at the bottom of the insulating sleeve and sleeved outside the lead tube;
the first voltage-sharing shielding is located in the insulating sleeve and located at the top of the insulating sleeve, is a multi-layer shielding and is sleeved outside the lead tube.
Further, a sealing terminal plate is arranged at the bottom of the first low-pressure heating air chamber, and the sealing terminal plate is connected with 2 power wires;
the control cabinet is internally provided with a 220V station power supply, and the power supply isolation device is used for isolating the 220V station power supply from 2 power supply wires connected with the sealing terminal plate, wherein one power supply wire connected with the sealing terminal plate is grounded.
Further, when the column type breaker is a single-break breaker, a metal extension section air chamber is connected to the top end of the arc extinguishing chamber of the breaker, and the metal extension section air chamber is communicated with the high-pressure heating air chamber.
Further, the voltage of the upper end and the lower end of the column type breaker is the same as that of the insulating sleeve.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention discloses a column type circuit breaker with high-voltage heating, which comprises heating equipment and a column type circuit breaker, wherein the heating equipment comprises a high-voltage heating air chamber, a high-voltage heating loop, an insulating air chamber and a first low-voltage heating air chamber. The column type circuit breaker comprises a circuit breaker arc extinguishing chamber and a circuit breaker column air chamber; the high-voltage heating loop sequentially comprises a power isolation device, a power line, a high-voltage insulation support and a heat supply element from bottom to top, wherein a power supply sequentially passes through the power isolation device at a low voltage side and the power line lead pipe to reach the insulation support of the high-voltage heating air chamber to supply power to the heat supply element positioned in the high-voltage heating air chamber, so that the high-voltage heating air chamber is heated, and meanwhile, heat flows to the arc-extinguishing chamber of the circuit breaker to heat the arc-extinguishing chamber of the column type circuit breaker; the whole high-voltage heating loop belongs to the ground potential, insulation between the heating element and the high-voltage body is realized by using the insulation support of the high-voltage heating air chamber and the insulation gas of the high-voltage heating air chamber, and the problem that the high voltage of the column type circuit breaker cannot be directly heated is solved; a first low-pressure heating air chamber is designed at the lower part of the insulating air chamber, and a second low-pressure heating air chamber is designed at the lower part of the circuit breaker support air chamber; the high-voltage heating circuit and the low-voltage heating air chamber are used for heating the breaker in a partitioning mode at the same time, the high-voltage heating circuit is mainly used for heating the arc extinguishing chamber of the breaker and the upper half part of the pillar air chamber of the breaker, and the low-voltage heating unit is mainly used for heating the lower half part of the pillar air chamber of the breaker and the insulating air chamber; by adding heating equipment and optimizing the circuit breaker structure into a double-insulation support structure, the structural stability of the circuit breaker is greatly improved, especially for the circuit breaker with extremely high height.
Further, the high-pressure shell is designed into a double-layer structure, and the heat insulation material is filled in the middle of the double-layer shell or is in a vacuum state so as to realize the heat preservation kinetic energy of the high-pressure shell.
Further, a heat reflective coating is arranged on the inner surface of the high-voltage body shell, and heated gas is radiated towards the arc extinguishing chamber of the circuit breaker.
Further, the heating element comprises a heating resistor and a blower, and the blower accelerates the gas circulation flow, thereby facilitating the diffusion of the heating gas.
Further, the heating resistor and the blower housing are designed to be of a structure suitable for the high-voltage body housing, and insulation requirements are met.
Further, the heating element is fixed on the high-voltage insulation support, the high-voltage insulation support is of a basin-type insulation structure, and the high-voltage heating air chamber and the insulation air chamber are separated through the high-voltage insulation support, so that the volume of insulation air to be heated is reduced, and the control of heating resistance power and volume is facilitated.
Furthermore, the high-pressure heating air chamber adopts internal heating, so that the heating efficiency is high, and the arc extinguishing chamber of the circuit breaker and the upper half part of the pillar air chamber are mainly heated; the low-pressure heating air chamber adopts external heating, is convenient to overhaul, and mainly heats the lower half part of the circuit breaker pillar air chamber and the insulating air chamber of the heating equipment.
Further, because the upper end and the lower end of the circuit breaker are always the same with the voltage of the upper end and the lower end of the insulating sleeve, when the distance between the circuit breaker support and the insulating sleeve is relatively close, the circuit breaker support has no influence on product insulation, and meanwhile, the occupied area of the product is limited to be increased.
Drawings
FIG. 1 is a block diagram of a column dual-break circuit breaker with a heating device;
FIG. 2 is a block diagram of a column type single break circuit breaker with a heating device;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a block diagram of a high pressure heating plenum;
fig. 5 is a view showing a structure of a high voltage insulation support.
The high-voltage power supply device comprises a high-voltage body, a heating element, a high-voltage heating air chamber, a high-voltage insulating support, a heating device, a first voltage equalizing shield, an insulating air chamber, an insulating sleeve, a lead pipe, a second voltage equalizing shield, a first low-voltage heating air chamber, a first low-voltage shell, a third flange, a sealing terminal plate, a power supply isolation device, a control cabinet, an arc extinguishing chamber connecting shell, a circuit breaker support air chamber, a second low-voltage heating air chamber and a chassis, wherein the high-voltage body is 1, the heating element, the high-voltage heating air chamber is 2, the high-voltage heating air chamber is 3, the high-voltage insulating support is 4, the heating device is 5, the first voltage equalizing shield is 6, the insulating air chamber is 7, the insulating sleeve is 8, the lead pipe is 9, the second voltage equalizing shield is 10, the first low-voltage heating air chamber is 11, the first low-voltage heating air chamber is 12, the first low-voltage shell is 13, the third flange is 14, the sealing terminal plate is 16, the power supply isolation device is 16, the control cabinet is a control cabinet, the control cabinet is 17, the arc extinguishing chamber is connected with the control cabinet, the arc-breaker is 17, the control cabinet is a control cabinet, the control and the control is a control; 21 is a metal extension section air chamber, 22 is a breaker arc-extinguishing chamber, 221 is a first breaker arc-extinguishing chamber, 222 is a second breaker arc-extinguishing chamber, 23 is a heat insulation material, 24 is a heat reflection coating, 25 is a blower, 26 is a heating resistor, 27 is a first flange, and 28 is a second flange;
41 is a fixed flange, 42 is an insulating support, 43 is an intermediate metal flange, 44 is a spring finger, and 45 is an insulating member.
Detailed Description
The invention will now be described in further detail with reference to specific examples, which are intended to illustrate, but not to limit, the invention.
As shown in fig. 1, the present invention discloses a column breaker with high-voltage heating, comprising a base frame 20, a heating device 5 and a column breaker arranged on the base frame 20, and a control cabinet 16 arranged under the base frame 20; the pole circuit breaker includes a circuit breaker arc chute 22 and a circuit breaker pole plenum 18 connected from top to bottom; a controller is arranged in the control cabinet 16, and a breaker arc extinguishing chamber 22 and a breaker post air chamber 18 are respectively provided with a temperature sensor which is connected with the controller; the heating equipment 5 comprises a high-pressure heating loop, a first low-pressure heating air chamber 11, an insulating air chamber 7 and a high-pressure heating air chamber 3 which are sequentially arranged from bottom to top; the first low-pressure heating air chamber 11 is communicated with the insulating air chamber 7; the high-voltage heating air chamber 3 is communicated with the breaker arc extinguishing chamber 22; the high-voltage heating loop comprises a power isolation device 15, a power line, a high-voltage insulation support 4 and a heating element 2 which are sequentially connected from bottom to top; the high-voltage insulating support 4 is arranged in the high-voltage heating air chamber 3; an insulating sleeve 8 is arranged in the insulating air chamber 7, a lead tube 9 is arranged in the insulating sleeve 8, a power wire penetrates through the lead tube 9, one end of the power wire is connected with a power isolation device 15, the other end of the power wire is connected with the high-voltage insulating support 4, and the heat supply element 2 is fixedly arranged on the high-voltage insulating support 4; a second low-pressure heating air chamber 19 is arranged below the breaker post air chamber 18, and the first low-pressure heating air chamber 11 is communicated with the second low-pressure heating air chamber 19.
As shown in fig. 4, the high-pressure heating chamber 3 includes a high-pressure body 1, a first flange 27, and a second flange 28; the high-pressure casing 1 is a double-layer casing, and a heat insulating material 23 is filled in the middle of the double-layer casing or is in a vacuum state, so that the high-pressure casing 1 has a great effect on the heat preservation of the high-pressure casing 1 and is used for realizing the heat preservation kinetic energy of the high-pressure casing 1.
More preferably, the inner surface of the high voltage housing 1 is provided with a heat reflective coating 24 to radiate the heated gas in the direction of the breaker arc chute 22.
One end of the high-voltage body 1 is connected with the insulating sleeve 8 in a sealing way through a first flange 27, and the high-voltage body 1 is connected with the arc extinguishing chamber 22 of the circuit breaker in a sealing way through a second flange 28.
As shown in fig. 1, the insulating plenum 7 contains insulating sleeves 8, 220V power line lead pipes 9, a first voltage grading shield 6, a second voltage grading shield 10, and a third flange 13.
The first voltage equalizing shield 6 is a multi-layer shield, is fixed at the lower end of the first flange 27, and is separated by an insulating member 45, so that an electric field can be uniformly distributed, and insulation between the 220V power supply lead-in tube 9 and high voltage can be realized.
The second voltage equalizing shield 10 is fixed to the upper end of the third flange 13 for equalizing the electric field.
The lower end of the 220V power supply lead-in tube 9 is fixed on the third flange 13, and the upper end is connected with the high-voltage insulation support 4 for leading the 220V power supply lead-in tube to the high-voltage heating air chamber 3.
The insulating sleeve 8 may be designed as a gas insulating structure or as a solid insulating structure. When designed as a solid insulation structure, the 220V power supply line, the first voltage equalizing shield 6 and the second voltage equalizing shield 10 are also poured inside.
The first low-pressure heating air chamber 11 is arranged between the underframe 20 and the insulating air chamber 7, and comprises a first low-pressure shell 12 and a heating belt wrapped outside the low-pressure shell.
The high pressure heating circuit extends through all areas from low pressure to high pressure. The high-voltage heating circuit sequentially comprises a 220V power isolation device 15, a sealing terminal plate 14, a 220V power line, a high-voltage insulation support 4 and a heating element 2 from bottom to top, wherein the heating element 2 comprises a heating resistor 26 and a blower 25.
As shown in fig. 5, the high-voltage insulating support 4 is a basin-type insulating structure, and is not ventilated. The high voltage insulation support 4 comprises a fixing flange 41, an insulation support 42, an intermediate metal flange 43. The fixing flange 41 is positioned at the circumferential position of the basin of the high-voltage insulation support 4, and the middle metal flange 43 is positioned at the middle position of the basin bottom. The fixing flange 41 and the high-voltage body shell 1 are both fixed on the first flange 27, and isolate the high-voltage heating air chamber 3 from the insulating air chamber 7, so that the volume of air in the high-voltage heating air chamber 3 is reduced, the high-voltage heating air chamber 3 is rapidly heated, heat is transferred to the arc-extinguishing chamber 22 of the circuit breaker, and meanwhile, the power and the volume of the heating resistor 26 are controlled;
the high-voltage insulation support 4 can also be designed as a plurality of groups of column-type insulation support structures distributed along the circumferential surface. At this time, the high-pressure heating chamber 3 and the insulating chamber 7 are conducted.
One end of the middle metal flange 43 is fixedly connected with the 220V power supply lead-in tube 9 through a spring contact finger 44, and the other end is used for fixing the heating resistor 26;
a 220V power supply wiring terminal a1 and a wiring terminal n1 are arranged on the middle metal flange 43, one end of the wiring terminal is connected with a power supply wire in the 220V power supply lead tube 9, and the other end is connected with a heating resistor 26 and a power supply wire of the blower 25; 220V power connection terminal a1 is insulated from middle metal flange 43 of high-voltage insulation support 4 by insulating piece 45, 220V insulation is realized, 220V power connection terminal n1 is equipotential with middle metal flange 43; insulation between the heating resistor 26, the blower 25 and the high-voltage housing 1 is achieved by insulating gas of the high-voltage heating chamber 3 through an insulating support.
The 220V power supply sequentially passes through the 220V power supply isolation device 15 in the low-voltage side control cabinet 16, the sealing terminal plate 14 of the insulating air chamber 7 and the 220V power supply wire guide tube 9 to reach the connecting terminal of the insulating support middle metal flange 43 of the high-voltage heating air chamber 3, and supplies power to the heating resistor 26 and the blower 25 which are positioned on the high-voltage heating air chamber 3 and fixed on the insulating support middle metal flange 43, so that the high-voltage heating air chamber 3 is heated, and meanwhile, the high-voltage heating air chamber 3 is communicated with the high-voltage body shell 1 due to the fact that the high-voltage heating air chamber 3 is connected with the circuit breaker arc extinguishing chamber 22, and the heat of the high-voltage heating air chamber 3 accelerates the flow of heating air through radiation and the blower 25, so that the heating of the column type circuit breaker arc extinguishing chamber 22 is realized.
The 220V power supply isolation device 15 is located in the control cabinet 16, and is used for isolating the 220V power supply for the station from the 220V power supply in the insulating air chamber 7, one end of the 220V power supply isolation device is connected with the a1 and n1 terminals of the 220V power supply for the station, and the other end of the 220V power supply isolation device is connected with the a2 and n2 terminals of the 220V power supply in the insulating air chamber 7. The 2 power lines a1 and n1 of the 220V power supply for the station cannot be grounded, and the 220V power lines a2 and n2 in the insulating air chamber 7 cannot have floating potential, wherein one power line n2 is used for grounding, so that the problem that the power line potential cannot be suspended is skillfully solved by utilizing the 220V power supply isolation device 15.
The sealing terminal plate 14 is mounted on the third flange 13 at the lower end of the insulating air chamber 7 for sealing the air chamber and 220V power lines connecting the inside and outside of the air chamber.
As shown in fig. 4, the heating resistor 26 is composed of a heating resistor 26 housing and a heating resistor 26 wire, and the blower 25 is composed of a blower 25 housing and a fan. The heating resistor 26 and the blower 25 are matched with the high-voltage body 1 in shape, so that the insulation requirement is met. The heating resistor 26 is coaxial with the high-voltage casing 1 in shape, and the blower 25 is coaxial with the portion of the high-voltage casing 1 connected to the circuit breaker.
The heating resistor 26 is internally provided with resistance wires, the resistance wires are distributed along the circumferential direction inside the heating resistor 26, and the heating resistor 26 can also be a 220V power supply heating belt, a heating plate, a heating pipe, a near infrared light source or the like.
The circuit breaker is a T-type or Y-type double-break circuit breaker, and as shown in fig. 3, the arc extinguishing chamber connection housing 17 is simultaneously connected with the first circuit breaker arc extinguishing chamber 221 and the second circuit breaker arc extinguishing chamber 222.
A second low-pressure heating air chamber 19 is arranged between the underframe 20 and the breaker post air chamber 18, and the second low-pressure heating air chamber 19 comprises a second low-pressure shell and a heating belt wrapped outside the low-pressure shell.
The first low pressure housing 12 is sealingly connected to the second low pressure housing.
The first low-pressure heating air chamber 11 and the second low-pressure heating air chamber 19 constitute a low-pressure side heating device, the high-pressure heating circuit and the low-pressure side heating device simultaneously perform partition heating on the circuit breaker, the high-pressure heating device mainly heats the circuit breaker arc extinguishing chamber 22 and the upper half part of the circuit breaker post air chamber 18, and the low-pressure side heating device mainly heats the lower half part of the circuit breaker post air chamber 18 and the insulating air chamber 7.
The control cabinet 16 is located below the underframe 20, a controller and a 220V power supply for a station are arranged in the control cabinet, a temperature sensor is arranged in or outside the air chamber of the circuit breaker, the temperature sensor is connected with the controller, the high-pressure heating loop, the first low-pressure heating air chamber 11 and the second low-pressure heating air chamber 19 are respectively connected with the power supply, and the power supply is connected with the controller. The temperature sensor collects temperature and transmits the temperature to the controller, and the controller can control the high-voltage heating loop and the low-voltage side heating air chamber of the circuit breaker to heat according to the temperature. When the temperature of the circuit breaker is lower than a certain temperature, the controller control station supplies power to the high-voltage heating loop and the low-voltage heating device by using a 220V power supply to heat, heat generated by the high-voltage heating air chamber 3 diffuses towards the arc extinguishing chamber and the pillar air chamber, and heat generated by the low-voltage heating device diffuses towards the pillar air chamber and the insulating air chamber 7. When the temperature of the circuit breaker is higher than a certain temperature, the controller controls the high-pressure heating loop and the low-pressure heating air chamber to stop heating.
The high-pressure heating air chamber 3 adopts an internal heating method, so that the heating efficiency is high; the first low-pressure heating air chamber 11 and the second low-pressure heating air chamber 19 adopt external heating to achieve the purpose of heating at the low pressure side, and the overhaul is convenient.
More preferably, the voltages at the upper end and the lower end of the circuit breaker post air chamber 18 and the high-voltage heating device insulating sleeve 8 are always the same, so that the circuit breaker post air chamber 18 and the high-voltage heating device insulating sleeve 8 can be relatively close in distance, and the insulation of products is not affected.
When the circuit breaker is a single-break circuit breaker, as shown in fig. 2, a circuit breaker extension high-voltage housing 1 is added to the top end of the circuit breaker arc extinguishing chamber 22, and the circuit breaker extension high-voltage housing 1 is communicated with the heating device 5 high-voltage housing 1. The heating is similar to that of a double-break circuit breaker.
The column circuit breaker and the heating device 5 are arranged side by side and are connected up and down, the circuit breaker structure is optimized from a single supporting structure to a double-insulation support structure, and the structural stability and the shock resistance of the circuit breaker with extremely high height are greatly improved.
Claims (10)
1. The column type breaker with high-voltage heating is characterized by comprising a bottom frame (20), heating equipment (5) and a column type breaker which are arranged on the bottom frame (20), and a control cabinet (16) arranged under the bottom frame (20); the column type circuit breaker comprises a circuit breaker arc extinguishing chamber (22) and a circuit breaker column air chamber (18) which are connected from top to bottom;
a controller and a power supply are arranged in the control cabinet (16), a breaker arc extinguishing chamber (22) and a breaker pillar air chamber (18) are provided with temperature sensors, and the temperature sensors are connected with the controller;
the heating equipment (5) comprises a high-pressure heating loop, a first low-pressure heating air chamber (11), an insulating air chamber (7) and a high-pressure heating air chamber (3) which are sequentially arranged from bottom to top; the first low-pressure heating air chamber (11) is communicated with the insulating air chamber (7); the high-pressure heating air chamber (3) is communicated with the arc extinguishing chamber (22) of the circuit breaker;
the high-voltage heating loop comprises a power isolation device (15), a power line, a high-voltage insulation support (4) and a heat supply element (2) which are sequentially connected from bottom to top; the high-voltage insulating support (4) is arranged in the high-voltage heating air chamber (3);
an insulating sleeve (8) is arranged in the insulating air chamber (7), a lead tube (9) is arranged in the insulating sleeve (8), a power line penetrates through the lead tube (9), one end of the power line is connected with a power isolation device (15), the other end of the power line is connected with a high-voltage insulating support (4), and the heat supply element (2) is fixedly arranged on the high-voltage insulating support (4);
a second low-pressure heating air chamber (19) is arranged below the circuit breaker support, and the first low-pressure heating air chamber (11) is communicated with the second low-pressure heating air chamber (19);
the high-pressure heating loop, the first low-pressure heating air chamber (11) and the second low-pressure heating air chamber (19) are respectively connected with a power supply, and the power supply is connected with a controller.
2. A pole circuit breaker with high-voltage heating according to claim 1, characterized in that the high-voltage heating chamber (3) comprises a high-voltage body (1), a first flange (27) and a second flange (28);
the high-pressure body shell (1) is a double-layer body shell, and a heat insulation material (23) is filled in the middle of the double-layer body shell or is in a vacuum state;
the high-voltage body shell (1) is connected with the insulating sleeve (8) through a first flange (27), and the high-voltage body shell (1) is connected with the circuit breaker arc extinguishing chamber (22) through a second flange (28).
3. A pole circuit breaker with high voltage heating according to claim 2, characterized in that the inner surface of the side of the high voltage body (1) remote from the breaker arc chute (22) is provided with a heat reflective coating (24) for radiating the heated gas in the direction of the breaker arc chute (22).
4. A column circuit breaker with high voltage heating according to claim 1, characterized in that the high voltage insulating support (4) is of basin-type insulating structure comprising a fixing flange (41), an insulating support (42) and an intermediate metal flange (43), both the fixing flange (41) and the high voltage body (1) being fixed on the first flange (27);
the heating element (2) comprises a heating resistor (26) and a blower (25);
one end of the middle metal flange (43) is fixedly connected with the lead tube (9) through a spring contact finger (44), and the other end of the middle metal flange is connected with the heating resistor (26);
a power connection terminal a1 and a power connection terminal n1 are arranged on the middle metal flange (43), one end of each of the two connection terminals is connected with a power line, and the other end is connected with a heating resistor (26) and the power line of the blower (25); the power connection terminal a1 is insulated from the intermediate metal flange (43) through an insulating piece (45), and the power connection terminal n1 is equipotential with the intermediate metal flange (43).
5. A pole breaker with high-voltage heating according to claim 4, characterized in that the external shape of the heating resistor (26), the blower (25) is matched to the high-voltage housing (1), the heating resistor (26) is coaxial to the high-voltage housing (1), and the blower (25) is coaxial to the second flange (28).
6. A pole breaker with high-voltage heating according to claim 1, characterized in that heating strips are provided outside both the first low-voltage heating chamber (11) and the second low-voltage heating chamber (19).
7. A column circuit breaker with high voltage heating according to claim 1, characterized in that the upper end of the insulating air chamber (7) is provided with a first voltage equalizing shield (6), and in the first low voltage heating air chamber (11) is provided with a second voltage equalizing shield (10);
the second voltage equalizing shield (10) is positioned in the insulating sleeve (8) and at the bottom of the insulating sleeve (8) and sleeved outside the lead tube (9);
the first voltage equalizing shield (6) is positioned in the insulating sleeve (8) and at the top of the insulating sleeve (8), is a multi-layer shield, and is sleeved outside the lead tube (9).
8. The column circuit breaker with high-voltage heating according to claim 1, characterized in that the bottom of the first low-voltage heating chamber (11) is provided with a sealing terminal plate (14), the sealing terminal plate (14) being connected with 2 power lines;
the control cabinet (16) is internally provided with a 220V station power supply, and the power supply isolation device (15) is used for isolating the 220V station power supply from 2 power supply wires connected with the sealing terminal plate (14), wherein one power supply wire connected with the sealing terminal plate (14) is grounded.
9. The pole breaker with high-voltage heating according to claim 1, characterized in that when the pole breaker is a single-break breaker, a metal extension gas chamber (21) is connected to the top end of the breaker arc extinguishing chamber (22), and the metal extension gas chamber (21) is communicated with the high-voltage heating gas chamber (3).
10. A pole breaker with high voltage heating according to claim 1, characterized in that the pole breaker is the same voltage as the upper and lower ends of the insulating sleeve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210335020.9A CN114597098B (en) | 2022-03-31 | 2022-03-31 | Column type circuit breaker with high-voltage heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210335020.9A CN114597098B (en) | 2022-03-31 | 2022-03-31 | Column type circuit breaker with high-voltage heating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114597098A CN114597098A (en) | 2022-06-07 |
| CN114597098B true CN114597098B (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210335020.9A Active CN114597098B (en) | 2022-03-31 | 2022-03-31 | Column type circuit breaker with high-voltage heating |
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| Country | Link |
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| CN (1) | CN114597098B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB542064A (en) * | 1940-09-27 | 1941-12-23 | David Reginald Davies | Improvements in and relating to electrical circuit breakers and switchgear of the air or gas blast kind |
| GB868793A (en) * | 1956-07-12 | 1961-05-25 | Ass Elect Ind | Improvements in and relating to air or gas blast electric circuit-breakers |
| CN200947415Y (en) * | 2006-09-11 | 2007-09-12 | 浙江华仪电器科技股份有限公司 | Porcelain knob breaker |
| CN103107042A (en) * | 2013-01-22 | 2013-05-15 | 上海乐研电气科技有限公司 | Sulfur hexafluoride high-voltage circuit breaker for cold region |
| CN203434076U (en) * | 2013-03-30 | 2014-02-12 | 陕西恒成电力技术有限责任公司 | Heating device of SF6 circuit breaker |
| CN205303296U (en) * | 2015-12-24 | 2016-06-08 | 陕西恒成电力技术有限责任公司 | Gaseous heat exchange device of SF6 circuit breaker explosion chamber |
| CN105719889A (en) * | 2016-04-01 | 2016-06-29 | 南昌大学 | Energy-saving heating and dehumidification device built in high-voltage SF6 circuit breaker |
| CN205789683U (en) * | 2016-06-30 | 2016-12-07 | 中国西电电气股份有限公司 | Column type circuit breaker for extremely frigid zones |
-
2022
- 2022-03-31 CN CN202210335020.9A patent/CN114597098B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB542064A (en) * | 1940-09-27 | 1941-12-23 | David Reginald Davies | Improvements in and relating to electrical circuit breakers and switchgear of the air or gas blast kind |
| GB868793A (en) * | 1956-07-12 | 1961-05-25 | Ass Elect Ind | Improvements in and relating to air or gas blast electric circuit-breakers |
| CN200947415Y (en) * | 2006-09-11 | 2007-09-12 | 浙江华仪电器科技股份有限公司 | Porcelain knob breaker |
| CN103107042A (en) * | 2013-01-22 | 2013-05-15 | 上海乐研电气科技有限公司 | Sulfur hexafluoride high-voltage circuit breaker for cold region |
| CN203434076U (en) * | 2013-03-30 | 2014-02-12 | 陕西恒成电力技术有限责任公司 | Heating device of SF6 circuit breaker |
| CN205303296U (en) * | 2015-12-24 | 2016-06-08 | 陕西恒成电力技术有限责任公司 | Gaseous heat exchange device of SF6 circuit breaker explosion chamber |
| CN105719889A (en) * | 2016-04-01 | 2016-06-29 | 南昌大学 | Energy-saving heating and dehumidification device built in high-voltage SF6 circuit breaker |
| CN205789683U (en) * | 2016-06-30 | 2016-12-07 | 中国西电电气股份有限公司 | Column type circuit breaker for extremely frigid zones |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114597098A (en) | 2022-06-07 |
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