CN110544597A - auxiliary arc extinguishing device for 800kV external grounding switch and use method - Google Patents
auxiliary arc extinguishing device for 800kV external grounding switch and use method Download PDFInfo
- Publication number
- CN110544597A CN110544597A CN201910942705.8A CN201910942705A CN110544597A CN 110544597 A CN110544597 A CN 110544597A CN 201910942705 A CN201910942705 A CN 201910942705A CN 110544597 A CN110544597 A CN 110544597A
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- grounding switch
- crank arm
- wiring board
- connecting rod
- extinguishing device
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000004020 conductor Substances 0.000 claims abstract description 44
- 238000004880 explosion Methods 0.000 claims abstract description 5
- 230000003068 static effect Effects 0.000 claims description 35
- 230000000149 penetrating effect Effects 0.000 claims description 5
- 238000000926 separation method Methods 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 238000010891 electric arc Methods 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000006698 induction Effects 0.000 description 6
- 238000005457 optimization Methods 0.000 description 5
- 230000005674 electromagnetic induction Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008832 photodamage Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/04—Means for extinguishing or preventing arc between current-carrying parts
- H01H33/12—Auxiliary contacts on to which the arc is transferred from the main contacts
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention relates to an auxiliary arc extinguishing device for an 800kV external grounding switch and a using method thereof. According to the invention, the arc extinguishing device is connected with the main grounding switch in parallel, so that electric arcs generated when the main grounding switch is switched on and off are avoided, and thus the contact of the main grounding switch is prevented from being burnt out; the driving structure adopts a connecting rod mechanism, so that the force transmission is flexible and reliable; through setting up inner conductor and stationary contact seat in the explosion chamber sleeve, further reduced electric arc, prolonged inner conductor and stationary contact seat's life.
Description
Technical Field
the invention relates to the technical field of external grounding switches, in particular to an auxiliary arc extinguishing device for an 800kV external grounding switch and a using method thereof.
Background
In order to reduce the floor area of a power transmission corridor, the overhead power transmission with two loops on the same tower becomes a common mode of a power transmission line, and even in some power grid dense areas, the overhead power transmission with four loops on the same tower appears. In these same-tower multi-circuit overhead power transmission modes, when one circuit is operated and the other circuit is stopped, induced voltage and induced current are generated on the stop line. With the increase of the transmission voltage of the line, the numerical values of the induction voltage and the induction current are gradually increased, and if the open type grounding switch is still adopted to independently divide, combine electromagnetic induction and electrostatic induction, the problems that the grounding switch contact is too large in straight-pulling electric arc, the metal contact is seriously burned and the like can be caused, and potential safety hazards are caused.
In order to solve the current situation that a grounding switch is difficult to separate and combine large electromagnetic induction and static induction, manufacturers at home and abroad adopt a method of additionally installing an auxiliary arc extinguishing device at present, but the existing auxiliary arc extinguishing device directly uses a low-voltage circuit breaker arc extinguishing chamber, the manufacturing cost of the auxiliary arc extinguishing device is relatively high, and the auxiliary arc extinguishing device cannot be widely applied.
disclosure of Invention
Aiming at the defects of the prior art, the invention provides the auxiliary arc extinguishing device for the 800kV external grounding switch and the using method thereof, which can meet the arc extinguishing requirement and reduce the cost of the auxiliary arc extinguishing device to 1/3.
The invention provides an auxiliary arc extinguishing device for an 800kV external grounding switch, which comprises a first wiring board, a second wiring board and an arc extinguish chamber sleeve, wherein two ends of the arc extinguish chamber sleeve are fixedly connected with the first wiring board and the second wiring board in a sealing mode respectively, a static contact seat positioned in the arc extinguish chamber sleeve is fixedly connected onto the second wiring board, an internal conductor penetrates through the first wiring board, and a driving mechanism for driving the internal conductor to be in contact with and separated from the static contact seat is arranged on one side, far away from the arc extinguish chamber sleeve, of the first wiring board.
This scheme is when using, with first wiring board and second wiring board electric connection main earthing switch's both sides in the major loop, make this arc control device parallelly connected with main earthing switch, during the separating brake, break off main earthing switch earlier, then make inner conductor and stationary contact seat separation through actuating mechanism, during the combined floodgate, make inner conductor and stationary contact seat contact switch on through actuating mechanism earlier, then closed main contact switch, consequently just there is not the electric arc to produce at main earthing switch open-close loop process, just can not harm main earthing switch contact yet, auxiliary arc control device's inner conductor and stationary contact seat can divide and shut corresponding electrostatic induction and electromagnetic induction when the divide-shut brake.
As optimization, the driving mechanism comprises a frame body fixedly connected with the first wiring board, a first pin shaft connected to the frame body in a shaft mode and an outer crank arm fixed to the first pin shaft, the outer crank arm on one side of the first pin shaft is hinged to a first connecting rod, and the first connecting rod is hinged to the crank arm of the mechanism; the first pin shaft is further fixedly connected with an inner crank arm extending along the radial direction, the inner crank arm is hinged with a second connecting rod, one end of the second connecting rod is hinged with the inner conductor, and the other end of the second connecting rod is connected in a sliding groove formed in the frame body in a sliding mode.
when the driving mechanism of the optimized scheme is used, the existing mechanism is utilized to drive the mechanism crank arm to rotate, the first connecting rod is driven to move through the rotation of the mechanism crank arm, so that the outer crank arm is driven to rotate, the first pin shaft and the inner crank arm are driven to rotate through the rotation of the outer crank arm, the second connecting rod is driven to rotate through the rotation of the inner crank arm, linear guide is provided for one end of the second connecting rod through the chute, and the other end of the second connecting rod drives the inner conductor to slide towards the stationary contact base and be communicated with the stationary contact base, so that the closing is realized; when the brake is switched off, the crank arms of the mechanism are rotated reversely, so that the first connecting rod, the outer crank arm, the inner crank arm and the second connecting rod move reversely to drive the inner conductor to be separated from the static contact seat, and the brake is switched off; the driving mechanism has simple structure, high force transmission reliability and high action flexibility.
And as optimization, the outer crank arm on the other side of the first pin shaft is connected with the frame body through the opening spring. This optimization scheme is through setting up the separating brake spring, and the contractile force when usable separating brake spring resets drives mechanism reverse movement, has further improved the flexibility of separating brake action.
Preferably, one end of the opening spring is fixedly connected with a lower connecting rod hinged with the outer crank arm, the other end of the opening spring is fixedly connected with an upper connecting rod provided with an adjusting screw rod in a penetrating mode, and the adjusting screw rod penetrates through the frame body and is fixedly connected with the frame body through a fastening nut. The setting of this optimization scheme can adjust the pretightning force of split brake spring through the position of adjustment fastening nut on adjusting screw, adapts to different split brake requirements.
Preferably, one end of the inner conductor facing the static contact seat is fixedly connected with a self-operated contact finger inserted into the static contact seat. The optimized scheme improves the conduction reliability of the inner conductor and the static contact seat through reasonable electric field design, and further reduces the generation of electric arcs.
Preferably, SF6 gas is filled in the arc extinguish chamber sleeve. According to the optimization scheme, SF6 gas with arc extinguishing performance is filled in the arc extinguishing chamber sleeve, so that the damage of electric arcs generated in the switching-on and switching-off processes to the contact is further reduced.
The use method of the auxiliary arc extinguishing device for the external grounding switch comprises the following steps:
a. The first wiring board and the second wiring board are respectively and electrically connected to two sides of a main grounding switch of a main loop, so that the auxiliary arc extinguishing device is connected with the main grounding switch in parallel;
b. during switching on, the mechanism rotating mechanism connecting lever or the direct rotating mechanism connecting lever in the prior art is adopted, the rotation of the mechanism connecting lever drives the outer connecting lever to rotate through the first connecting rod, the rotation of the outer connecting lever drives the first pin shaft and the inner connecting lever to rotate, the switching-off spring is stretched, the rotation of the inner connecting lever drives the second connecting rod to rotate, linear guide is provided for one end of the second connecting rod through the chute, and the other end of the second connecting rod drives the inner conductor to slide towards the stationary contact base and be communicated with the stationary contact base;
After the inner conductor is conducted with the static contact seat, the mechanism connecting lever is fixed, the mechanism connecting lever is limited to rotate, and then the main grounding switch is closed;
c. During opening, the main grounding switch is firstly disconnected, then the fixing of the mechanism crank arm is released, the outer crank arm reversely rotates under the pulling of the opening spring, and then the inner crank arm, the second connecting rod and the inner conductor are driven to reversely move, and the inner conductor is separated from the static contact seat.
The method is characterized in that an arc extinguishing device is connected with a main grounding switch in parallel, when the main grounding switch breaks a grounding loop, a static contact seat and an inner conductor in an auxiliary arc extinguishing device are still in a conducting state, and after the main grounding switch is broken, the loop where the arc extinguishing device is located is broken; before the main grounding switch is closed, the loop where the arc extinguishing device is located is firstly conducted, so that the main grounding switch cannot generate electric arcs in the process of opening and closing the loop, and the contact of the main grounding switch is prevented from being damaged.
The invention has the beneficial effects that: the arc extinguishing device is connected with the main grounding switch in parallel, so that electric arcs generated when the main grounding switch is switched on and off are avoided, and the contact of the main grounding switch is prevented from being burnt out; the driving structure adopts a connecting rod mechanism, so that the force transmission is flexible and reliable; through setting up inner conductor and stationary contact seat in the explosion chamber sleeve, further reduced electric arc, prolonged inner conductor and stationary contact seat's life.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view of the inner conductor and the stationary contact;
FIG. 3 is a state diagram of the outer crank arm during opening;
FIG. 4 is a state diagram of an outer crank arm during closing;
FIG. 5 is a side sectional view of FIG. 4;
FIG. 6 is a schematic structural view of a spring mechanism;
shown in the figure:
1. The device comprises a spring mechanism, 2, a mechanism crank arm, 3, a first connecting rod, 4, an outer crank arm, 5, a brake separating spring, 6, a first wiring board, 7, a movable contact base, 8, an inner conductor, 9, a static contact base, 10, an arc extinguish chamber sleeve, 11, a static side support, 12, a second wiring board, 13, an inner crank arm, 14, a second connecting rod, 15, a sliding groove, 16, an output shaft, 17, a pin, 18, a cam, 19, a self-force contact finger, 20 and a static arc contact.
Detailed Description
in order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
as shown in fig. 1, an auxiliary arc extinguishing device for 800kV external grounding switch comprises a first wiring board 6, a second wiring board 12 and an arc extinguish chamber sleeve 10, wherein two ends of the arc extinguish chamber sleeve 10 are respectively and fixedly connected with the first wiring board and the second wiring board in a sealing manner, the arc extinguish chamber sleeve 10 is filled with SF6 gas, a movable contact base, an inner conductor, a static contact base and a static side support are all positioned inside the arc extinguish chamber sleeve 10, and the first wiring board 6 and the second wiring board 12 are respectively connected with two sides of a main grounding switch through wires, so that the device is connected with the main grounding switch in parallel.
the second wiring board 12 is fixedly connected with a static contact seat 9 positioned in the sleeve of the arc extinguish chamber through a static side support 11, and a static arc contact 20 is arranged in the static contact seat. A movable contact seat 7 is fixedly arranged on the first wiring board 6 in a penetrating mode, an inner conductor 8 is arranged on the movable contact seat 7 in a penetrating mode, one end, facing the static contact seat, of the inner conductor is welded with a self-operated contact finger 19 which is connected with the static contact seat in an inserting mode, and the inner conductor is in contact with and separated from the static contact seat 9 and the static arc contact 20 in the opening and closing process.
and a driving mechanism for driving the inner conductor 8 to be contacted with and separated from the static contact seat 9 is arranged on one side of the first wiring board, which is far away from the sleeve of the arc extinguish chamber. The driving mechanism comprises a frame body fixedly connected with a first wiring board 6, a first pin shaft connected to the frame body in a shaft mode, and an outer crank arm 4 fixed to the first pin shaft in a sleeved mode, the first pin shaft is perpendicular to an inner conductor, the outer crank arm on one side of the first pin shaft is hinged to a first connecting rod 3, the first connecting rod 3 is hinged to a mechanism crank arm 2 fixedly connected with an output shaft 16 of a spring mechanism, the spring mechanism 1 is in the prior art and is structurally shown in the figure 6, the output shaft 16 can be driven to rotate when a cam 18 rotates, when an electromagnet is powered off, a pin is inserted into the cam to limit the cam to rotate reversely, and when the electromagnet is powered on, the pin 17 is sucked away and loses the limit on.
An inner crank arm 13 extending along the radial direction is further fixedly connected to the first pin shaft, the inner crank arm 13 is hinged to the middle position of the second connecting rod 14, one end of the second connecting rod 14 is hinged to the inner conductor 8, the other end of the second connecting rod is connected to a sliding groove 15 formed in the frame in a sliding mode, and the extending direction of the sliding groove is perpendicular to the plane where the first pin shaft and the inner conductor are located.
The outer crank arm on the other side of the first pin shaft is connected with the frame body through a brake separating spring 5, and the brake separating spring and the first connecting rod are respectively positioned on two sides of the first pin shaft. One end of the opening spring 5 is fixedly connected with a lower connecting rod hinged with the outer crank arm, the other end of the opening spring is fixedly connected with an upper connecting rod provided with an adjusting screw rod in a penetrating mode, and the adjusting screw rod penetrates through the frame body and is fixedly connected with the frame body through a fastening nut.
The use method of the auxiliary arc extinguishing device for the external grounding switch comprises the following steps:
a. the first wiring board and the second wiring board are respectively and electrically connected to two sides of a main grounding switch of a main loop, so that the auxiliary arc extinguishing device is connected with the main grounding switch in parallel;
b. When the switch is switched on, the cam 18 in the spring mechanism is utilized to drive the output shaft to rotate, so that the mechanism crank arm is driven to rotate, the rotation of the mechanism crank arm drives the outer crank arm to rotate through the first connecting rod, the rotation of the outer crank arm drives the first pin shaft and the inner crank arm to rotate, the switch-off spring is stretched, the rotation of the inner crank arm drives the second connecting rod to rotate, linear guide is provided for one end of the second connecting rod through the chute, and the other end of the second connecting rod drives the inner conductor to slide towards the static contact base and be communicated with the static contact base;
After the inner conductor is communicated with the static contact seat, the rotation of the cam is limited through the pin, so that the crank arm of the mechanism is fixed, and then the main grounding switch is closed;
c. when the brake is opened, the main grounding switch is firstly disconnected, then the electromagnet in the spring mechanism is electrified, the pin is sucked through the electromagnet, so that the fixing of the mechanism crank arm is released, the outer crank arm rotates reversely under the pulling of the brake opening spring, the inner crank arm, the second connecting rod and the inner conductor are driven to move reversely, and the inner conductor is separated from the static contact seat.
when the main grounding switch is disconnected with the grounding loop, the static contact seat and the inner conductor in the auxiliary arc-extinguishing device are still in a conducting state, and after the main grounding switch is disconnected, the inner conductor is separated from the static contact seat, so that the main grounding switch is also connected with the auxiliary arc-extinguishing device in a loop manner when the main grounding switch is disconnected with the grounding loop, and the process of disconnecting the main grounding switch from the grounding loop cannot generate electric arcs, and the contact of the main grounding switch cannot be damaged. The conductor and the static contact seat of the auxiliary arc extinguishing device can be used for corresponding electrostatic induction and electromagnetic induction when the switch is switched on and off, the part is switched on and off in an SF6 environment, SF6 has good arc extinguishing performance relative to air, and therefore electric arcs generated in the switching on and off process have light damage to the contacts.
Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides an external earthing switch of 800kV is with supplementary arc extinguishing device which characterized in that: including first wiring board (6), second wiring board (12) and both ends respectively with the explosion chamber sleeve pipe (10) of the sealed rigid coupling of first wiring board, second wiring board, the rigid coupling has the quiet seat of touching (9) that is located the explosion chamber sleeve pipe on second wiring board (12), wear to be equipped with inner conductor (8) on first wiring board (6), first wiring board is kept away from explosion chamber sheathed tube one side and is equipped with drive inner conductor (8) and the actuating mechanism who touches seat (9) contact, separation quiet.
2. The auxiliary arc extinguishing device for the 800kV external grounding switch as claimed in claim 1, wherein: the driving mechanism comprises a frame body fixedly connected with a first wiring board (6), a first pin shaft connected to the frame body in a shaft mode and an outer crank arm (4) fixed to the first pin shaft, the outer crank arm on one side of the first pin shaft is hinged to a first connecting rod (3), and the first connecting rod (3) is hinged to a mechanism crank arm (2);
an inner crank arm (13) extending along the radial direction is further fixedly connected to the first pin shaft, the inner crank arm (13) is hinged to a second connecting rod (14), one end of the second connecting rod (14) is hinged to the inner conductor (8), and the other end of the second connecting rod is connected to a sliding groove (15) formed in the frame in a sliding mode.
3. The auxiliary arc extinguishing device for the 800kV external grounding switch as claimed in claim 2, wherein: the outer crank arm at the other side of the first pin shaft is connected with the frame body through a brake separating spring (5).
4. The auxiliary arc extinguishing device for the 800kV external grounding switch as claimed in claim 3, wherein: one end of the opening spring (5) is fixedly connected with a lower connecting rod hinged with the outer crank arm, the other end of the opening spring is fixedly connected with an upper connecting rod provided with an adjusting screw rod in a penetrating mode, and the adjusting screw rod penetrates through the frame body and is fixedly connected with the frame body through a fastening nut.
5. The auxiliary arc extinguishing device for the 800kV external grounding switch as claimed in claim 1, wherein: one end of the inner conductor facing the static contact seat is fixedly connected with a self-operated contact finger (19) inserted into the static contact seat.
6. The auxiliary arc extinguishing device for the 800kV external grounding switch as claimed in claim 1, wherein: SF6 gas is filled in the arc extinguish chamber sleeve (10).
7. the use method of the auxiliary arc extinguishing device for the external grounding switch of any one of claims 1 to 6 is characterized by comprising the following steps:
a. The first wiring board and the second wiring board are respectively and electrically connected to two sides of a main grounding switch of a main loop, so that the auxiliary arc extinguishing device is connected with the main grounding switch in parallel;
b. when the switch is switched on, the mechanism connecting lever is rotated, the rotation of the mechanism connecting lever drives the outer connecting lever to rotate through the first connecting rod, the rotation of the outer connecting lever drives the first pin shaft and the inner connecting lever to rotate, the switch-off spring is stretched, the rotation of the inner connecting lever drives the second connecting lever to rotate, linear guide is provided for one end of the second connecting lever through the chute, and the other end of the second connecting lever drives the inner conductor to slide towards the stationary contact base and be communicated with the stationary contact base;
after the inner conductor is conducted with the static contact seat, the crank arm of the mechanism is fixed, and then the main grounding switch is closed;
c. During opening, the main grounding switch is firstly disconnected, then the fixing of the mechanism crank arm is released, the outer crank arm reversely rotates under the pulling of the opening spring, and then the inner crank arm, the second connecting rod and the inner conductor are driven to reversely move, and the inner conductor is separated from the static contact seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942705.8A CN110544597B (en) | 2019-09-30 | 2019-09-30 | Auxiliary arc extinguishing device for 800kV external grounding switch and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910942705.8A CN110544597B (en) | 2019-09-30 | 2019-09-30 | Auxiliary arc extinguishing device for 800kV external grounding switch and use method |
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| Publication Number | Publication Date |
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| CN110544597A true CN110544597A (en) | 2019-12-06 |
| CN110544597B CN110544597B (en) | 2024-09-24 |
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| CN201910942705.8A Active CN110544597B (en) | 2019-09-30 | 2019-09-30 | Auxiliary arc extinguishing device for 800kV external grounding switch and use method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735898A (en) * | 2020-12-01 | 2021-04-30 | 平高集团有限公司 | Arc contact and circuit breaker |
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| CN112735898B (en) * | 2020-12-01 | 2023-09-29 | 平高集团有限公司 | Arc contact and circuit breaker |
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| CN110544597B (en) | 2024-09-24 |
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