CN114597098A - Column type circuit breaker with high-pressure heating - Google Patents
Column type circuit breaker with high-pressure heating Download PDFInfo
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- CN114597098A CN114597098A CN202210335020.9A CN202210335020A CN114597098A CN 114597098 A CN114597098 A CN 114597098A CN 202210335020 A CN202210335020 A CN 202210335020A CN 114597098 A CN114597098 A CN 114597098A
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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, wherein the heating equipment is arranged on the column type circuit breaker; the column type circuit breaker comprises a circuit breaker arc extinguish chamber and a circuit breaker strut gas chamber; a controller and a power supply are arranged in the control cabinet, 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, and 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-voltage heating air chamber is communicated with the arc extinguish chamber of the circuit breaker; the high-voltage heating loop comprises a power supply isolation device, a power supply line, a high-voltage insulating support and a heat supply element which are sequentially connected from bottom to top; a second low-voltage heating air chamber is arranged below the breaker strut; 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. The problem of the unable gaseous low temperature liquefaction of effectively avoiding SF6 that the unable direct heating of high pressure side leads to is solved.
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
Generally, a high-voltage circuit breaker filled with insulating gas with a certain pressure generates a low-temperature liquefaction phenomenon at a certain temperature below zero SF6 gas, 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 influenced. The following solutions are generally adopted.
1) The use of the breaking capacity is reduced;
2) mixed gas of SF6+ N2 is adopted to keep rated parameters of the circuit breaker unchanged;
3) the method of heating and heat preservation is adopted to ensure that the liquefaction pressure of SF6 is higher than the SF6 air pressure when the breaker is closed.
The most economically feasible solution is the third one, namely, the reasonable and effective design of the circuit breaker structure to add the heating device. When the ambient temperature drops to a certain temperature (-25 ℃), the heating device is automatically put into operation to heat the SF6 gas in the circuit breaker, thereby solving the problem of low-temperature liquefaction of the SF6 gas in the circuit breaker in severe cold regions.
Generally, there are 2 methods for using heating tapes of an open-type circuit breaker, one is to use a heating tape to heat an arc-extinguishing chamber shell at the low-voltage side of a tank-type circuit breaker, which can effectively solve the problem of low-temperature liquefaction of SF6 gas, but when the system voltage is relatively high, the tank-type circuit breaker is relatively expensive; the utility model provides a be that the column circuit breaker uses the heating band heating at the low-voltage side, and when voltage ratio is lower, can effectively solve the problem of SF6 gaseous low temperature liquefaction, but when system voltage ratio is higher, because the product is higher, the low-voltage side heating band is for the explosion chamber, and the distance is than far away, and the explosion chamber of high-pressure side can not effectual transmission to the heat that produces at the low-voltage side, consequently, also can not effectually avoid the gaseous low temperature liquefaction problem of SF 6.
Disclosure of Invention
The invention aims to provide a column type circuit breaker with high-voltage heating, which solves the problem that low-temperature liquefaction of SF6 gas cannot be effectively avoided due to the fact that a high-voltage side cannot be directly heated.
The invention is realized by the following technical scheme:
a column type circuit breaker with high-voltage heating comprises a bottom frame, heating equipment and a column type circuit breaker which are arranged on the bottom frame, and a control cabinet arranged below the bottom frame; the column type circuit breaker comprises a circuit breaker arc extinguish chamber and a circuit breaker strut gas chamber which are connected from top to bottom;
a controller and a power supply are arranged in the control cabinet, temperature sensors are arranged in the arc extinguish chamber of the circuit breaker and the strut gas chamber of the circuit breaker, and the temperature sensors are connected with the controller;
the heating equipment comprises a high-pressure heating loop, and 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-voltage heating air chamber is communicated with the arc extinguish chamber of the circuit breaker;
the high-voltage heating loop comprises a power supply isolation device, a power supply line, a high-voltage insulating 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 line penetrates through the lead pipe, one end of the power line is connected with the power isolation device, the other end of the power line 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 breaker strut, 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 shell, a first flange and a second flange;
the high-pressure body shell is a double-layer body shell, and the middle of the double-layer body shell is filled with heat insulation materials or is in a vacuum state;
the high-voltage shell is connected with the insulating sleeve through a first flange, and the high-voltage shell is connected with the arc extinguish chamber of the circuit breaker through a second flange.
Furthermore, the inner surface of one side of the high-voltage shell, which is far away from the arc extinguish chamber of the circuit breaker, is provided with a heat reflection coating for radiating the heated gas towards the arc extinguish chamber of the circuit breaker.
Furthermore, the high-voltage insulating support is of a basin-type insulating structure and comprises a fixed flange, an insulating support piece and a middle metal flange, wherein the fixed flange and the high-voltage housing are fixed on the first flange;
the heat supply element comprises a heating resistor and a blower;
one end of the middle metal flange is fixedly connected with the lead pipe through a spring contact finger, and the other end of the middle metal flange is connected with the heating resistor;
a power supply wiring terminal a1 and a power supply wiring terminal n1 are arranged on the middle metal flange, one end of each wiring terminal is connected with a power line, and the other end of each wiring terminal 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.
Furthermore, the external shapes of the heating resistor and the blower are matched with the high-pressure shell, the heating resistor is coaxial with the high-pressure shell, and the blower is coaxial with the second flange.
Furthermore, heating belts are arranged outside the first low-pressure heating air chamber and the second low-pressure heating air chamber.
Further, a first voltage-sharing shield is arranged at the upper end of the insulating air chamber, and a second voltage-sharing shield is arranged in the first low-pressure heating air chamber;
the second voltage-sharing shield is positioned in the insulating sleeve and at the bottom of the insulating sleeve and sleeved outside the lead tube;
the first voltage-sharing shield is positioned in the insulating sleeve and at the top of the insulating sleeve, is a multilayer shield and is sleeved outside the lead tube.
Further, a sealing terminal board is arranged at the bottom of the first low-pressure heating air chamber and connected with 2 power lines;
the control cabinet is internally provided with a 220V station power supply, the power supply isolation device is used for isolating the 220V station power supply from 2 power lines connected with the sealed terminal board, and one power line connected with the sealed terminal board is grounded.
Furthermore, when the column type circuit breaker is a single-break circuit breaker, a metal extension section air chamber is connected to the top end of the arc extinguish chamber of the circuit breaker and communicated with the high-pressure heating air chamber.
Further, the voltage of the upper and lower terminals of the column 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 extinguish chamber and a circuit breaker strut gas chamber; the high-voltage heating loop sequentially comprises a power supply isolating device, a power supply line, a high-voltage insulating support and a heat supply element from bottom to top, wherein the power supply sequentially passes through the power supply isolating device and a power supply line lead tube on a low-voltage side to reach the insulating support of the high-voltage heating air chamber, the heat supply element positioned in the high-voltage heating air chamber is powered to heat the high-voltage heating air chamber, and meanwhile, heat flows to the arc extinguish chamber of the circuit breaker to heat the arc extinguish chamber of the column type circuit breaker; the whole high-voltage heating loop belongs to the ground potential, the insulation between the heat supply element and the high-voltage housing is realized by utilizing 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 column type circuit breaker cannot be directly heated at high voltage is solved; a first low-voltage heating air chamber is designed at the lower part of the insulating air chamber, and a second low-voltage heating air chamber is designed at the lower part of the breaker strut air chamber; the high-voltage heating circuit and the low-voltage heating air chamber simultaneously perform zone heating on the circuit breaker, the high-voltage heating circuit mainly heats an arc extinguish chamber of the circuit breaker and the upper half part of a strut air chamber of the circuit breaker, and the low-voltage heating unit mainly heats the lower half part of the strut air chamber of the circuit breaker and an insulating air chamber; through increasing heating apparatus, and optimize the circuit breaker structure for two insulating pillar bearing structures, especially to the circuit breaker of high specially high, its structural stability greatly promotes.
Further, the high pressure body shell is designed to be a double-layer structure, and the middle of the double-layer body shell is filled with heat insulation materials or is in a vacuum state, so that the heat preservation kinetic energy of the high pressure body shell is realized.
Furthermore, the inner surface of the high-voltage shell is provided with a heat reflection coating which radiates the heated gas towards the arc extinguish chamber of the circuit breaker.
Further, the heating element comprises a heating resistor and a blower, and the blower accelerates the gas circulation flow and is favorable for heating gas diffusion.
Furthermore, the heating resistor and the shell of the hair drier are designed into structures which are adaptive to the high-voltage shell, and the insulation requirement is met.
Furthermore, the heat supply element is fixed on a high-voltage insulating support, the high-voltage insulating support is of a basin-type insulating structure, and the high-voltage heating air chamber and the insulating air chamber are separated by the high-voltage insulating support, so that the volume of the insulating gas to be heated is reduced, and the control of the power and the volume of the heating resistor is facilitated.
Furthermore, the high-pressure heating air chamber adopts internal heating, has high heating efficiency and mainly heats the arc extinguish chamber of the circuit breaker and the upper half part of the strut air chamber; the low-pressure heating air chamber adopts external heating, and it is convenient to overhaul, mainly heats circuit breaker pillar air chamber the latter half and the insulating air chamber of firing equipment.
Further, because circuit breaker and insulation support upper and lower both ends voltage is the same all the time, consequently when circuit breaker pillar and insulation support apart from relatively being close to, also do not have the influence to the product is insulating, makes the limited increase of product area simultaneously.
Drawings
Fig. 1 is a structural diagram of a column type double-break circuit breaker with a heating device;
FIG. 2 is a structural 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 view showing the structure of a high-pressure heating chamber;
fig. 5 is a structure diagram of the high voltage insulation support.
The device comprises a shell, a heating element, a high-voltage heating air chamber, a high-voltage insulating support, a heating device, a first voltage-sharing shield, an insulating air chamber, an insulating sleeve, a lead pipe, a second voltage-sharing shield, a first low-voltage heating air chamber, a first low-voltage shell, a third flange, a sealing terminal board, a power isolation device, a control cabinet, an arc extinguish chamber connecting shell, a breaker strut, a second low-voltage heating air chamber, a circuit breaker strut, a control cabinet, an arc extinguish chamber connecting shell, a circuit breaker strut, a second low-voltage heating air chamber and a chassis, wherein 1 is a high-voltage shell, 2 is a heating element, 3 is a high-voltage heating air chamber, 4 is a high-voltage insulating support, 5 is heating equipment, 6 is a first voltage-sharing shield, 7 is an insulating air chamber, 8 is an insulating sleeve, 9 is a lead pipe, 10 is a second voltage-sharing shield, 11 is a first low-voltage heating air chamber, 12 is a first low-voltage shell, 13 is a sealing terminal board, 15 is a power isolation device, 16 is a control cabinet, 17 arc extinguish chamber connecting shell, 18 is a circuit breaker strut, a chassis; 21 is a metal extension section gas chamber, 22 is a breaker arc extinguish chamber, 221 is a first breaker arc extinguish chamber, 222 is a second breaker arc extinguish chamber, 23 is a heat insulating 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;
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
As shown in fig. 1, the present invention discloses a column type circuit breaker with high voltage heating, which comprises a bottom frame 20, a heating device 5 and a column type circuit breaker arranged on the bottom frame 20, and a control cabinet 16 arranged under the bottom frame 20; the column type circuit breaker comprises a breaker arc extinguish chamber 22 and a breaker strut air chamber 18 which are connected from top to bottom; a controller is arranged in the control cabinet 16, and a breaker arc extinguish chamber 22 and a breaker strut air chamber 18 are respectively provided with a temperature sensor which is connected with the controller; the heating device 5 comprises a high-pressure heating loop, and 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 arc extinguish chamber 22 of the circuit breaker; the high-voltage heating loop comprises a power supply isolating device 15, a power supply line, a high-voltage insulating 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 the high-voltage insulating support 4, and the heat supply element 2 is fixedly arranged on the high-voltage insulating support 4; and a second low-pressure heating air chamber 19 is arranged below the breaker strut 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 gas chamber 3 includes a high-pressure housing 1, a first flange 27, and a second flange 28; the high pressure hull 1 is a double-layer hull filled with a heat insulating material 23 or in a vacuum state, which has a great effect on maintaining heat in the high pressure hull 1 to realize thermal insulation kinetic energy of the high pressure hull 1.
Preferably, the inner surface of the high voltage housing 1 is provided with a heat reflecting coating 24 for radiating the heated gas towards the arc extinguishing chamber 22 of the circuit breaker.
One end of the high-voltage housing 1 is hermetically connected with the insulating sleeve 8 through a first flange 27, and the high-voltage housing 1 is hermetically connected with the arc extinguish chamber 22 of the circuit breaker through a second flange 28.
As shown in fig. 1, the insulating air chamber 7 includes an insulating sleeve 8, a 220V power line lead tube 9, a first grading shield 6, a second grading shield 10, and a third flange 13.
The first voltage-sharing shield 6 is a multilayer shield and is fixed at the lower end of the first flange 27, and the multilayer shields are separated by the insulating piece 45, so that an electric field is uniform, and the insulation between the 220V power supply lead pipe 9 and high voltage is realized.
A second grading shield 10 is fixed to the upper end of the third flange 13 for evening the electric field.
The lower end of a 220V power supply lead tube 9 is fixed on the third flange 13, and the upper end is connected with the high-voltage insulating support 4 and used for leading a 220V power supply line to the high-voltage heating air chamber 3.
The insulating sleeve 8 can be designed as a gas-insulated structure or as a solid-insulated structure. When the voltage-sharing shielding structure is designed to be a solid insulation structure, the 220V power supply line, the first voltage-sharing shielding 6 and the second voltage-sharing shielding 10 are also poured inside.
The first low-pressure heating air chamber 11 is arranged between the bottom frame 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 runs through all areas from low pressure to high pressure. The high-voltage heating loop comprises a 220V power supply isolation device 15, a sealing terminal board 14, a 220V power supply line, a high-voltage insulation support 4 and a heating element 2 from bottom to top in sequence, 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-shaped insulating structure and is not ventilated. The high voltage insulating support 4 comprises a fixing flange 41, an insulating support 42 and an intermediate metal flange 43. The fixing flange 41 is positioned at the circumferential position of the basin edge of the high-voltage insulating support 4, and the middle metal flange 43 is positioned at the middle position of the basin bottom. The fixed flange 41 and the high-voltage housing 1 are both fixed on the first flange 27, and the high-voltage heating air chamber 3 is isolated from the insulating air chamber 7, the design is to reduce the volume of the gas in the high-voltage heating air chamber 3, rapidly heat the high-voltage heating air chamber 3, transfer the heat to the arc extinguish chamber 22 of the circuit breaker, and simultaneously facilitate the control of the power and the volume of the heating resistor 26;
the high voltage insulation support 4 can also be designed as a plurality of groups of column insulation support structures distributed along the circumferential surface. The high-pressure heating air chamber 3 and the insulating air chamber 7 are conducted at the moment.
One end of the middle metal flange 43 is fixedly connected with the 220V power supply lead pipe 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 of the wiring terminal is connected with the heating resistor 26 and a power supply wire of the blower 25; the 220V power supply wiring terminal a1 is insulated from the middle metal flange 43 of the high-voltage insulating support 4 through an insulating piece 45, so that the insulation of 220V is realized, and the 220V power supply wiring terminal n1 is equipotential with the middle metal flange 43; the insulation between the heating resistor 26, the blower 25 and the high-voltage casing 1 is achieved by the insulating support and the insulating gas of the high-voltage heating gas chamber 3.
The 220V power supply sequentially passes through a 220V power supply isolating device 15 in a low-voltage side control cabinet 16, a sealing terminal board 14 of an insulating air chamber 7 and a 220V power supply wire lead 9 to reach a wiring terminal of an insulating support middle metal flange 43 of a high-voltage heating air chamber 3, power is supplied to a heating resistor 26 and a blower 25 which are positioned on the insulating support middle metal flange 43 of the high-voltage heating air chamber 3, the high-voltage heating air chamber 3 is heated, meanwhile, the high-voltage heating air chamber 3 is communicated with a high-voltage housing 1 connected with a breaker arc extinguish chamber 22, the heat of the high-voltage heating air chamber 3 accelerates the flow of heating gas through radiation and the blower 25, and the column type breaker arc extinguish chamber 22 is heated.
The 220V power supply isolation device 15 is positioned 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 device is connected with terminals a1 and n1 of the 220V power supply for the station, and the other end of the device is connected with terminals a2 and n2 of the 220V power supply in the insulating air chamber 7. 2 power lines a1 and n1 of the 220V power supply for the station cannot be grounded, the 220V power lines a2 and n2 in the insulating air chamber 7 cannot have floating potential, and one power line n2 is used for grounding, so that the problem that the power line potential cannot float is solved skillfully by the 220V power supply isolation device 15.
A 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 connecting the 220V power supply lines inside and outside the air chamber.
As shown in fig. 4, the heating resistor 26 is composed of a heating resistor 26 case and a heating resistor 26 wire, and the blower 25 is composed of a blower 25 case and a fan. The shapes of the heating resistor 26 and the blower 25 are matched with the high-voltage casing 1, 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 a portion of the high voltage casing 1 to which the circuit breaker is connected.
The heating resistor 26 is internally provided with resistance wires which are distributed along the circumferential direction inside the heating resistor 26, and the heating resistor 26 can also be a heating belt, a heating plate, a heating pipe or a near-infrared light source and the like which are powered by 220V.
The circuit breaker is a T-type or Y-type double-break circuit breaker, and as shown in fig. 3, the arc-extinguishing chamber connecting housing 17 is simultaneously connected with a first circuit breaker arc-extinguishing chamber 221 and a second circuit breaker arc-extinguishing chamber 222.
A second low-pressure heating air chamber 19 is arranged between the chassis 20 and the breaker strut 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.
First low-pressure heating air chamber 11 and second low-pressure heating air chamber 19 constitute low pressure side heating device, and high-pressure heating return circuit and low pressure side heating device carry out the subregion simultaneously and heat to the circuit breaker, and high-pressure heating device mainly heats circuit breaker explosion chamber 22 and circuit breaker pillar air chamber 18 the first half, and low pressure side heating device mainly heats circuit breaker pillar air chamber 18 the latter half and insulating air chamber 7.
The control cabinet 16 is positioned 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 breaker air chamber and 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 for heating, the heat generated by the high-voltage heating air chamber 3 is diffused towards the arc extinguish chamber and the strut air chamber, and the heat generated by the low-voltage heating device is diffused towards the strut 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 realize the purpose of heating at the low-pressure side, and the maintenance is convenient.
Preferably, the voltages of the upper end and the lower end of the breaker strut air chamber 18 and the high-voltage heating device insulating sleeve 8 are always the same, so that the breaker strut air chamber 18 and the high-voltage heating device insulating sleeve 8 can be closer to each other, and no influence is caused on product insulation.
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 at the top end of an arc extinguish chamber 22 of the circuit breaker, and the circuit breaker extension high-voltage housing 1 is communicated with a high-voltage housing 1 of a heating device 5. The heating is similar to that of a double break circuit breaker.
Column type circuit breaker and firing equipment 5 arrange side by side, link to each other from top to bottom, optimize the circuit breaker structure into two insulation support bearing structure by single bearing structure, especially to the high circuit breaker very much, its structural stability and anti-seismic performance greatly promote.
Claims (10)
1. The column type circuit breaker with high-voltage heating is characterized by comprising an underframe (20), a heating device (5) and the column type circuit breaker which are arranged on the underframe (20), and a control cabinet (16) which is arranged below the underframe (20); the column type circuit breaker comprises a breaker arc extinguish chamber (22) and a breaker strut air chamber (18) which are connected from top to bottom;
a controller and a power supply are arranged in the control cabinet (16), temperature sensors are arranged in the arc extinguish chamber (22) of the circuit breaker and the strut air chamber (18) of the circuit breaker, and the temperature sensors are connected with the controller;
the heating equipment (5) comprises a high-pressure heating loop, and 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 arc extinguish chamber (22) of the circuit breaker;
the high-voltage heating loop comprises a power supply isolation device (15), a power supply line, a high-voltage insulating 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 pipe (9) is arranged in the insulating sleeve (8), a power line penetrates through the lead pipe (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 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-voltage heating air chamber (19) is arranged below the breaker strut, and the first low-voltage heating air chamber (11) is communicated with the second low-voltage 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 the controller.
2. The column circuit breaker with high-voltage heating according to claim 1, characterized in that the high-voltage heating gas chamber (3) comprises a high-voltage housing (1), a first flange (27) and a second flange (28);
the high-pressure body shell (1) is a double-layer body shell, and the middle of the double-layer body shell is filled with a heat insulating material (23) or is in a vacuum state;
the high-voltage casing (1) is connected with the insulating sleeve (8) through a first flange (27), and the high-voltage casing (1) is connected with the arc extinguish chamber (22) of the circuit breaker through a second flange (28).
3. Column circuit breaker with high-voltage heating according to claim 2, characterized in that the inner surface of the high-voltage housing (1) on the side remote from the circuit breaker arc chamber (22) is provided with a heat-reflecting coating (24) for radiating the heated gas in the direction of the circuit breaker arc chamber (22).
4. The column circuit breaker with high-voltage heating according to claim 1, characterized in that the high-voltage insulating support (4) is a basin-type insulating structure, comprising a fixed flange (41), an insulating support (42) and an intermediate metal flange (43), wherein the fixed flange (41) and the high-voltage casing (1) are 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 pipe (9) through a spring contact finger (44), and the other end is connected with the heating resistor (26);
a power supply wiring terminal a1 and a power supply wiring terminal n1 are arranged on the middle metal flange (43), one end of each wiring terminal is connected with a power line, and the other end of each wiring terminal is connected with the power lines of the heating resistor (26) and the blower (25); the power supply wiring terminal a1 is insulated from the intermediate metal flange (43) by an insulating member (45), and the power supply wiring terminal n1 is equipotential with the intermediate metal flange (43).
5. The column circuit breaker with high-voltage heating according to claim 4, characterized in that the external shape of the heating resistor (26) and the blower (25) is matched with the high-voltage casing (1), the heating resistor (26) is coaxial with the high-voltage casing (1), and the blower (25) is coaxial with the second flange (28).
6. Column circuit breaker with high voltage heating according to claim 1, characterized in that a heating belt is provided outside both the first (11) and the second (19) low voltage heating gas chamber.
7. The column circuit breaker with high voltage heating according to claim 1, characterized in that the upper end of the insulating gas chamber (7) is provided with a first grading shield (6), and a second grading shield (10) is provided in the first low voltage heating gas chamber (11);
the second voltage-sharing shield (10) is positioned in the insulating sleeve (8), positioned at the bottom of the insulating sleeve (8) and sleeved outside the lead tube (9);
the first voltage-sharing shield (6) is positioned in the insulating sleeve (8) and at the top of the insulating sleeve (8), is a multilayer 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 a sealing terminal board (14) is arranged at the bottom of the first low-voltage heating air chamber (11), and 2 power lines are connected to the sealing terminal board (14);
the control cabinet (16) is internally provided with a 220V station power supply, 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 board (14), and one power supply wire connected with the sealing terminal board (14) is grounded.
9. Column circuit breaker with high-voltage heating according to claim 1, characterized in that when the column circuit breaker is a single-break circuit breaker, a metal extension gas chamber (21) is connected to the top of the arc-extinguishing chamber (22) of the circuit breaker, and the metal extension gas chamber (21) is communicated with the high-voltage heating gas chamber (3).
10. Column circuit breaker with high-voltage heating according to claim 1, characterized in that the voltages at the upper and lower ends of the column circuit breaker and the bushing (8) are the same.
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 true CN114597098A (en) | 2022-06-07 |
| CN114597098B 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) |
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|---|---|---|---|---|
| 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 |
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| Publication number | Publication date |
|---|---|
| CN114597098B (en) | 2023-06-13 |
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