CN108321001B - Three-station switch - Google Patents
Three-station switch Download PDFInfo
- Publication number
- CN108321001B CN108321001B CN201810132217.6A CN201810132217A CN108321001B CN 108321001 B CN108321001 B CN 108321001B CN 201810132217 A CN201810132217 A CN 201810132217A CN 108321001 B CN108321001 B CN 108321001B
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- grounding
- isolation
- isolating
- rotating shaft
- extinguishing chamber
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- 230000007246 mechanism Effects 0.000 claims abstract description 156
- 238000002955 isolation Methods 0.000 claims abstract description 80
- 230000005540 biological transmission Effects 0.000 claims description 81
- 238000004146 energy storage Methods 0.000 claims description 53
- 238000000926 separation method Methods 0.000 claims description 13
- 230000007935 neutral effect Effects 0.000 claims description 10
- 239000002131 composite material Substances 0.000 claims description 9
- 239000004677 Nylon Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 239000011152 fibreglass Substances 0.000 claims 2
- 239000003365 glass fiber Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000009421 internal insulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- 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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
- H01H33/6661—Combination with other type of switch, e.g. for load break switches
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- 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
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/664—Contacts; Arc-extinguishing means, e.g. arcing rings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The application belongs to the technical field of power switching equipment, and particularly relates to a three-station switch. The three-position switch comprises: the isolating and grounding three-station mechanism comprises a fixed contact electrically connected with a main vacuum arc-extinguishing chamber in a main circuit of the circuit breaker, an isolating contact electrically connected with a grounding vacuum arc-extinguishing chamber in a grounding circuit, an isolating disconnecting link and an isolating and grounding three-station mechanism for driving the isolating disconnecting link to conduct the main circuit where the main vacuum arc-extinguishing chamber is located when the isolating disconnecting link is switched on with the fixed contact and conduct the grounding circuit when the isolating disconnecting link is switched on with the isolating contact. According to the three-station switch, the grounding vacuum arc-extinguishing chamber is arranged in the grounding switch, so that the grounding switch has higher-level grounding closing capability. Through the three-station mechanism of isolated ground, make ground vacuum interrupter and isolation switch have logical sequential linkage, only when isolation switch is in the isolation position, ground vacuum interrupter combined floodgate just can make the ground return circuit switch on, has ensured the reliability of ground return circuit in logical relation.
Description
Technical Field
The application belongs to the technical field of power switching equipment, and particularly relates to a three-station switch, a ring main unit based on the grounding switch and an operation method of the ring main unit.
Background
The existing inflatable ring main unit has three modes for realizing the grounding closing function, namely, 1, the three-station rotary disconnecting link grounding switch structure realizes the grounding closing function; 2. the direct-acting grounding switch structure realizes a grounding function; 3. the vacuum arc-extinguishing chamber is used as a main loop for opening and closing short-circuit current and is also used as a grounding switch to realize a grounding closing function. The three modes have advantages and disadvantages, and the first and second modes have the disadvantages that the contact and the contact knife are easy to ablate when the grounding switch is carried out, metal particles are ionized, the internal environment of the sealed box body is polluted, and the current passing capacity and the insulation level of the main loop are affected. The third mode has the disadvantage that the operation violates the national network security operation requirement, and the operator is easy to misunderstand.
In order to solve the above-mentioned problem, there are ring main units adopting dual arc-extinguishing chambers in the prior art, for example CN104377073a discloses a grounding switch and a solid insulation ring main unit based on the grounding switch. The device comprises a vacuum arc-extinguishing chamber, a grounding arc-extinguishing chamber and a pole body provided with the vacuum arc-extinguishing chamber and the grounding arc-extinguishing chamber. The grounding also adopts the form of a vacuum arc extinguishing chamber, so that the ground connection can be realized safely and reliably for a plurality of times. However, the isolating switch and the grounding vacuum arc-extinguishing chamber of the grounding switch structure are not logically interlocked, no matter where the isolating switch is, when the grounding vacuum arc-extinguishing chamber is switched on, the grounding loop is directly conducted, and the risk that the grounding loop is mistakenly connected after the main loop is switched on, so that the whole circuit is electrified and grounded exists. And the grounding vacuum arc-extinguishing chamber is poured into the solid-sealed pole, and when the arc-extinguishing chamber has a problem, the whole pole cannot be replaced and scrapped. In addition, the arc extinguishing chamber and the insulating pull rod are transversely arranged, and occupy large space.
Disclosure of Invention
The application aims to solve the problems that a grounding switch is easy to operate by mistake, low in safety, difficult to replace an arc-extinguishing chamber and the like in the prior art, and accordingly provides a grounding switch with a logic sequential linkage structure between the grounding arc-extinguishing chamber and an isolation switch and easy to replace the grounding arc-extinguishing chamber, a ring main unit based on the grounding switch and an operation method of the ring main unit.
In order to achieve the technical purpose and the technical effect, the application is realized by the following technical scheme:
a three-position switch, comprising: the three-station mechanism comprises a fixed contact electrically connected with a main vacuum arc-extinguishing chamber in a main circuit of the circuit breaker, an isolation contact electrically connected with a grounding vacuum arc-extinguishing chamber in a grounding circuit, an isolation disconnecting link and an isolation grounding three-station mechanism, wherein the isolation disconnecting link is driven to conduct the main circuit where the main vacuum arc-extinguishing chamber is located when the isolation disconnecting link is switched on with the fixed contact, and conduct the grounding circuit when the isolation disconnecting link is switched on with the isolation contact.
The three-station switch further comprises a grounding contact seat electrically connected with the grounding circuit when the grounding vacuum arc-extinguishing chamber is not arranged on the grounding vacuum arc-extinguishing chamber mounting position, and the isolating and grounding three-station mechanism drives the isolating knife switch to conduct a main circuit where the main vacuum arc-extinguishing chamber is positioned when the static contact is closed; when the isolating knife switch is at the isolating position, the main loop and the grounding loop are disconnected; and when the grounding contact seat is closed, the grounding loop is conducted.
The isolating disconnecting link is arranged on the isolating rotating shaft, and the output shaft of the three-station mechanism of the isolating and grounding three-station mechanism drives the isolating rotating shaft to rotate through the intermediate transmission structure so as to drive the isolating disconnecting link to rotate.
The isolation grounding three-station mechanism comprises: a three-station mechanism isolation rotating shaft, a three-station mechanism output shaft, a grounding rotating shaft, a first transmission mechanism arranged between the three-station mechanism isolation rotating shaft and the three-station mechanism output shaft, a second transmission mechanism arranged on the grounding rotating shaft,
when the grounding contact seat is connected in the grounding loop, the isolated grounding three-station mechanism further comprises a third transmission mechanism arranged on an output shaft of the three-station mechanism, and the second transmission mechanism and the third transmission mechanism are matched for transmission to drive the output shaft of the three-station mechanism to rotate;
when the isolation fracture is separated, the isolation rotating shaft of the three-station mechanism rotates clockwise or anticlockwise, and the output shaft of the three-station mechanism is driven to rotate through the first transmission mechanism so as to drive the main loop isolation rotating shaft to be separated and combined;
when the isolation contact knife is separated, the grounding rotating shaft rotates clockwise or anticlockwise, and the second transmission mechanism drives the third transmission mechanism to drive the output shaft of the three-station mechanism to rotate so as to drive the main loop isolation rotating shaft to be separated and combined;
or (b)
When the grounding circuit is connected with the grounding vacuum arc-extinguishing chamber, the isolated grounding three-station mechanism comprises a grounding output rotating shaft and a fourth transmission mechanism arranged between the second transmission mechanism and the grounding output rotating shaft, and the second transmission mechanism and the fourth transmission mechanism are matched for transmission to drive the grounding output rotating shaft to rotate;
when the isolation fracture is separated, the isolation rotating shaft of the three-station mechanism rotates clockwise or anticlockwise, and the output shaft of the three-station mechanism is driven to rotate through the first transmission mechanism so as to drive the main loop isolation rotating shaft to be separated and combined;
when the grounding vacuum arc-extinguishing chamber is grounded and combined, the grounding rotating shaft rotates clockwise or anticlockwise, and the fourth transmission mechanism is driven by the second transmission mechanism to drive the grounding output rotating shaft to rotate.
The first transmission mechanism comprises a first elastic energy storage structure, a first transmission assembly, an isolation striking plate capable of rotating around a shaft, and a first crank arm which is integrated with the output shaft of the three-station mechanism into a whole, wherein when the main vacuum arc extinguishing chamber is isolated and separated, the isolation rotating shaft of the three-station mechanism rotates clockwise or anticlockwise to drive an energy storage spring in the first elastic energy storage structure to a neutral position, and after the energy storage spring drives the first transmission assembly to drive the isolation striking plate to rotate through the neutral position, the isolation striking plate impacts the first crank arm to drive the output shaft of the three-station mechanism to rotate, so that the isolation rotating shaft of the main loop is driven to separate and combine.
The first crank arm is provided with a first roller, and the isolation striking plate drives the first crank arm to rotate by striking the first roller.
The isolation striking plate is U-shaped, and the first roller is positioned in the U-shaped cavity of the isolation striking plate.
The second transmission mechanism comprises a second elastic energy storage structure, a second transmission assembly and a grounding collision plate; and after the energy storage spring in the second elastic energy storage structure is compressed to the neutral position by the rotating grounding rotating shaft, the compressed stroke of the energy storage spring is released by the energy storage spring, and the grounding collision plate is driven to rotate by the second transmission assembly.
The first elastic energy storage structure and the second elastic energy storage structure are formed by the same elastic energy storage structure, and the three-station mechanism isolation rotating shaft and the grounding rotating shaft are respectively arranged at two ends of an energy storage spring of the elastic energy storage structure.
The third transmission mechanism comprises a second crank arm arranged on the output shaft of the three-station mechanism, and the grounding striking plate rotates to strike the second crank arm to rotate, so that the output shaft of the three-station mechanism is driven to rotate, and the separation and the combination of the main loop isolation rotating shaft are realized.
The second crank arm is provided with a second roller, and the grounding striking plate rotates to strike the second roller to drive the second crank arm to rotate.
The grounding collision plate is U-shaped, and the second roller is positioned in the U-shaped cavity of the grounding collision plate.
The fourth transmission mechanism comprises an arc extinguishing chamber module, a connecting plate and a rotating piece arranged on a rotating shaft, wherein one end of the arc connecting plate is hinged with the grounding collision plate, the other end of the arc connecting plate is hinged with the rotating piece, one end of the connecting plate is hinged with the rotating piece, the other end of the connecting plate is connected with one end of the crank, and the other end of the crank is connected with the grounding output rotating shaft.
The main vacuum arc-extinguishing chamber and the grounding vacuum arc-extinguishing chamber are arranged on an insulating support, the grounding vacuum arc-extinguishing chamber is arranged below the main vacuum arc-extinguishing chamber, and the axis of the grounding vacuum arc-extinguishing chamber and the axis of the main vacuum arc-extinguishing chamber are obliquely arranged.
The insulating bracket is made of a composite material mixed by nylon and glass fiber; the insulating support can also be made of a composite material mixed by plastic and glass fiber.
The beneficial effects of the application are as follows: (1) According to the three-station switch provided by the application, the main vacuum arc-extinguishing chamber, the grounding vacuum arc-extinguishing chamber and the isolation grounding three-station mechanism are arranged on the insulating support, the grounding vacuum arc-extinguishing chamber and the isolation knife switch are logically interlocked, and the grounding loop can be conducted only when the isolation knife switch is in the isolation position, so that the reliability of the grounding loop is ensured in a logic relationship.
(2) According to the three-station switch provided by the application, the grounding switch has higher-level grounding closing capability by assembling the grounding vacuum arc-extinguishing chamber, and the internal insulation of a product is not influenced.
(3) According to the three-station switch provided by the application, the grounding vacuum arc-extinguishing chamber is detachably arranged on the insulating bracket, so that whether the grounding vacuum arc-extinguishing chamber is installed or not can be selected according to actual requirements, and the product cost can be effectively saved.
(4) According to the three-station switch provided by the application, the main vacuum arc-extinguishing chambers in the main circuit of the circuit breaker are vertically arranged and the grounding vacuum arc-extinguishing chambers are obliquely arranged, so that the size of a product can be reduced.
(5) The three-position switch provided by the application adopts the nylon and glass fiber mixed composite material for the insulating bracket, and the material is an environment-friendly material and has the characteristics of light weight, reusability, high stability and the like.
(6) According to the ring main unit based on the three-station switch, the reliability of the grounding loop is ensured in a logic relationship through the three-station switch, wherein the grounding loop has higher-level grounding closing capability and cannot influence the internal insulation of the ring main unit.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1: the three-station switch schematic diagram of the application;
fig. 2: the ring main unit is in side view;
fig. 3: the front view of the ring main unit of the application;
fig. 4: an isolated grounding three-station mechanism top view for installing an arc extinguishing chamber module;
fig. 5: a three-dimensional schematic diagram of an isolated grounding three-station mechanism for installing an arc extinguishing chamber module;
fig. 6: different station schematic diagrams of the isolating contact knife for installing the arc extinguishing chamber module;
fig. 7: an isolated grounding three-station mechanism top view without an arc extinguishing chamber module;
fig. 8: an isolated grounding three-station mechanism three-dimensional schematic diagram without an arc extinguishing chamber module;
fig. 9: different station schematic diagrams of the isolated contact knife without the arc extinguishing chamber module;
fig. 10: the working principle of the application is schematically shown.
Reference numerals illustrate:
the device comprises a main insulation pull rod, a 2-soft connection, a main vacuum arc-extinguishing chamber 3, a fixed contact 4, an isolating switch 5, an isolating contact 6, a grounding vacuum arc-extinguishing chamber 7, an isolating pull rod 8, an isolating pull rod 9, a wire outlet sleeve I10, a transmission part 11, a wire outlet sleeve II 12, a circuit breaker mechanism 13, an isolating three-station mechanism 13, an air box 14, a base 15, an isolating module 16, an output module 17, an energy storage spring 18, an earthing module 19, an arc-extinguishing chamber module 20, an earthing contact seat 21, an earthing output rotating shaft 22, a connecting plate 23, a rotating shaft 24, an arc-shaped connecting plate 25, an earthing rotating shaft 26, an earthing striking plate 27, an output shaft 28, an isolating rotating shaft 29-three-station mechanism, an isolating striking plate 30, a first roller 31 and a second roller 32.
Detailed Description
The application will be described in detail below with reference to the drawings in combination with embodiments.
Example 1
As shown in fig. 4-5 and 7-8, an isolated ground three-position mechanism 13 includes: a three-station mechanism isolation rotating shaft 29, a three-station mechanism output shaft 28, a grounding rotating shaft 26, a first transmission mechanism arranged between the three-station mechanism isolation rotating shaft 29 and the three-station mechanism output shaft 28, a second transmission mechanism arranged on the grounding rotating shaft 26,
when the grounding contact seat 21 is connected in the grounding loop, the isolated grounding three-station mechanism 13 further comprises a third transmission mechanism arranged on the output shaft 28 of the three-station mechanism, and the second transmission mechanism and the third transmission mechanism are matched for transmission to drive the output shaft 28 of the three-station mechanism to rotate;
when the isolation fracture is separated, the isolation rotating shaft 29 of the three-station mechanism rotates clockwise or anticlockwise, and the output shaft 28 of the three-station mechanism is driven by the first transmission mechanism to rotate so as to drive the main loop isolation rotating shaft to be separated and combined;
when the isolating contact knife is separated, the grounding rotating shaft 26 rotates clockwise or anticlockwise, and the third transmission mechanism is driven by the second transmission mechanism to drive the output shaft 28 of the three-station mechanism to rotate so as to drive the main loop isolating rotating shaft to be separated and combined;
or (b)
When the grounding vacuum arc extinguishing chamber 7 is connected in the grounding loop, the isolated grounding three-station mechanism 13 comprises a grounding output rotating shaft 22 and a fourth transmission mechanism arranged between the second transmission mechanism and the grounding output rotating shaft 22, and the second transmission mechanism and the fourth transmission mechanism are matched to drive the grounding output rotating shaft 22 to rotate, as shown in fig. 4-5;
when the isolation fracture is separated, the isolation rotating shaft 29 of the three-station mechanism rotates clockwise or anticlockwise, and the output shaft 28 of the three-station mechanism is driven by the first transmission mechanism to rotate so as to drive the main loop isolation rotating shaft to be separated and combined;
when the grounding vacuum arc-extinguishing chamber 7 is grounded and separated, the grounding rotating shaft 26 rotates clockwise or anticlockwise, and the fourth transmission mechanism is driven by the second transmission mechanism to drive the grounding output rotating shaft 22 to rotate.
The first transmission mechanism comprises a first elastic energy storage structure, a first transmission component, an isolating striking plate 30 capable of rotating around a shaft and a first crank arm which is solid-integrated with the output shaft 28 of the three-station mechanism, when the main vacuum arc extinguishing chamber 3 is isolated and separated, the isolating rotating shaft 29 of the three-station mechanism rotates clockwise or anticlockwise to drive the energy storage spring 18 in the first elastic energy storage structure to be in a neutral position, after the energy storage spring 18 is in the neutral position, the first transmission component is driven to drive the isolating striking plate 30 to rotate, the isolating striking plate 30 impacts the first crank arm to drive the output shaft 28 of the three-station mechanism to rotate, so that the isolating rotating shaft of the main circuit is driven to be separated and combined, as shown in figures 4-8.
As shown in fig. 5, a first roller 31 is disposed on the first crank arm, and the isolation striking plate 30 drives the first crank arm to rotate by striking the first roller 31.
The isolation striker plate 30 is U-shaped, and the first roller 31 is positioned in the U-shaped cavity of the isolation striker plate 30.
The second transmission mechanism comprises a second elastic energy storage structure, a second transmission assembly and a grounding collision plate 27; after the rotating grounding shaft 26 compresses the energy storage spring 18 in the second elastic energy storage structure to the neutral position, the energy storage spring 18 releases the compressed stroke to drive the grounding impact plate 27 to rotate through the second transmission assembly.
The first elastic energy storage structure and the second elastic energy storage structure are formed by the same elastic energy storage structure, and the three-station mechanism isolation rotating shaft 29 and the grounding rotating shaft 26 are respectively arranged at two ends of the energy storage spring 18 of the elastic energy storage structure.
The third transmission mechanism comprises a second crank arm arranged on the output shaft 28 of the three-station mechanism, and the grounding striking plate 27 rotates to strike the second crank arm to rotate, so that the output shaft 28 of the three-station mechanism is driven to rotate, and the separation and the combination of the main loop isolation rotating shafts are realized.
As shown in fig. 8, the second crank arm is provided with a second roller 32, and the ground collision plate 27 rotates to collide with the second roller 32 to drive the second crank arm to rotate.
As shown in fig. 5, the ground striking plate 27 is U-shaped, and the second roller 32 is located in the U-shaped cavity of the ground striking plate 27.
As shown in fig. 4-5, the fourth transmission mechanism includes a crank, a connecting plate 23, a rotating member disposed on the rotating shaft 24, and an arc connecting plate 25, wherein one end of the arc connecting plate 25 is hinged with the grounding striking plate 27, the other end is hinged with the rotating member, one end of the connecting plate 23 is hinged with the rotating member, the other end is connected with one end of the crank, and the other end of the crank is connected with the grounding output rotating shaft 22.
Example 2
As shown in fig. 1, a three-position switch includes: the isolating and grounding three-station mechanism 13 comprises an insulating support, a grounding insulating pull rod 8, a fixed contact 4 electrically connected with a main vacuum arc-extinguishing chamber 3 in a main circuit of the circuit breaker, an isolating contact 6 electrically connected with a grounding vacuum arc-extinguishing chamber 7 in a grounding circuit, an isolating disconnecting link 5 and an isolating and grounding three-station mechanism 13, wherein the isolating disconnecting link 5 is driven to conduct the main circuit where the main vacuum arc-extinguishing chamber 3 is located when the isolating contact 5 is switched on with the fixed contact 4, and to conduct the grounding circuit when the isolating contact 6 is switched on. The specific structure and the positional relationship of the isolated grounding three-station mechanism 13 are as shown in embodiment 1.
The grounding vacuum arc-extinguishing chamber 7 is detachable on the grounding vacuum arc-extinguishing chamber installation position, and because of the detachable arrangement of the grounding vacuum arc-extinguishing chamber 7, the grounding vacuum arc-extinguishing chamber 7 can be flexibly replaced, so that the grounding vacuum arc-extinguishing chamber is convenient to maintain and replace during faults and whether the grounding vacuum arc-extinguishing chamber is installed or not is selected according to different technical schemes. When the grounding vacuum arc-extinguishing chamber 7 is not arranged on the grounding vacuum arc-extinguishing chamber mounting position, the three-station switch further comprises a grounding contact seat 21 electrically connected with the grounding loop, as shown in fig. 7-8; the isolation grounding three-station mechanism 13 drives the isolation disconnecting link 5 to conduct a main loop in which the main vacuum arc-extinguishing chamber 3 is positioned when the isolation disconnecting link is switched on with the fixed contact 4; when the isolating switch 5 is in the isolating position, the main loop and the grounding loop are disconnected; when the ground contact seat 21 is closed, the ground circuit is turned on. The ground circuit can be conducted only when the isolating switch 5 is in the isolating position by the isolating and grounding three-station mechanism 13, and the grounding vacuum arc-extinguishing chamber 7 is switched on. Thereby ensuring the reliability of the ground loop in a logical relationship.
The isolating disconnecting link 5 is arranged on an isolating rotating shaft, and a three-station mechanism output shaft 28 of the isolating grounding three-station mechanism 13 drives the isolating rotating shaft to rotate through an intermediate transmission structure so as to drive the isolating disconnecting link 5 to rotate.
The main vacuum arc-extinguishing chamber 3 and the grounding vacuum arc-extinguishing chamber 7 are arranged on an insulating bracket, the grounding vacuum arc-extinguishing chamber 7 is arranged below the main vacuum arc-extinguishing chamber 3, and the axis of the grounding vacuum arc-extinguishing chamber 7 and the axis of the main vacuum arc-extinguishing chamber 3 are obliquely arranged; the space size is effectively reduced.
The insulating bracket is made of a composite material mixed by nylon and glass fiber, or a composite material mixed by plastic and glass fiber; the composite material of nylon and glass fiber and the composite material of plastic and glass fiber are both environment-friendly materials, and have the characteristics of light weight, reusability, high stability and the like.
Example 3
The utility model provides a looped netowrk cabinet, includes main insulating pull rod 1, flexible coupling 2, main vacuum interrupter 3, the sleeve pipe I9 that is qualified for the next round of competitions, transmission part 10, sleeve pipe II 11 that is qualified for the next round of competitions, gas tank 14, base 15, sets up circuit breaker mechanism 12 and three station switch on the base 15, circuit breaker mechanism 12 realizes through transmission part 10 the switching of main vacuum interrupter 3. The specific structure of the three-position switch is as described in embodiment 2.
One end of the main insulation pull rod 1 is connected with the main vacuum arc-extinguishing chamber 3, and the soft connection 2 is tightly pressed on the movable end rod of the main vacuum arc-extinguishing chamber 3; the breaker mechanism 12 drives the transmission part 10 to realize the switching-on and switching-off of the main vacuum arc extinguishing chamber 3; the ground circuit can be conducted only when the isolating knife switch 5 is in the isolating position by the isolating and grounding three-station mechanism 13, and the specific structure of the ring main unit is shown in fig. 2-3.
The working process and principle of the whole ring main unit are as follows:
i, when the grounding vacuum arc-extinguishing chamber 7 is arranged, the working process is as follows:
a. operation isolation separating and combining device
First, the isolating rotary shaft 29 is rotated clockwise or anticlockwise (clockwise and anticlockwise when the switch is closed) by the operating handle, the energy storage spring 18 is compressed by the rotating isolating rotary shaft 29, and when the energy storage spring 18 is compressed to a centering position, the compression stroke is released by the energy storage spring 18 so as to drive the isolating striker plate 30 to rotate. The output shaft 28 of the three-station mechanism is driven by the isolating striking plate 30 to rotate so as to drive the isolating rotary shaft of the main loop to be separated and combined.
b. Operating the grounding switching: (Split-combination grounding vacuum arc-extinguishing chamber)
The ground rotating shaft 26 is rotated clockwise or anticlockwise (switching on anticlockwise and switching off clockwise) through the operating handle, the rotating ground rotating shaft 26 compresses the energy storage spring 18, and when the energy storage spring 18 is compressed to the centering position, the compression stroke is released by the energy storage spring 18 so as to drive the ground striking plate 27 to rotate. The grounding striking plate 27 drives the final grounding output rotating shaft 22 to rotate through the arc-shaped connecting plate 25, the rotating shaft 24 and the connecting plate 23. Thereby realizing the separation and the combination of the grounding vacuum arc extinguishing chamber 7.
II, when the grounding vacuum arc-extinguishing chamber 7 is not arranged, the working process is as follows:
as shown in fig. 7-8, the grounding vacuum arc-extinguishing chamber 7 can be selectively installed according to the requirement, when the grounding vacuum arc-extinguishing chamber 7 is not installed, the grounding vacuum arc-extinguishing chamber 7 is replaced by the grounding contact seat 21, and the states of separation and closing, separation and separation, grounding and the like are realized through the separation contact knife 5, and the separation knife switch 5 has three working states: the contact blade is in an isolated switch-on state I, the contact blade is in an isolated switch-off state II and the contact blade is in a grounded switch-on state III, as shown in FIG. 9.
The isolating and grounding three-station mechanism 13 does not need to be provided with the arc extinguishing chamber module 20, and the structure of the isolating and grounding three-station mechanism 13 is shown in fig. 7-8.
a. Operation isolation separating and combining device
The isolating rotary shaft 29 is operated to rotate clockwise or anticlockwise (clockwise for closing and anticlockwise for opening), the isolating rotary shaft 29 is rotated to compress the energy storage spring 18, and when the energy storage spring 18 is compressed to the neutral position, the compression stroke of the energy storage spring 18 is released to drive the isolating striker plate 30 to rotate. The isolation striking plate 30 drives the output shaft 28 of the three-station mechanism to rotate, thereby driving the isolation switch of the main loop to be opened and closed.
b. Operating the grounding switching: (separation and combination isolation contact knife)
The ground rotating shaft 26 is rotated clockwise or anticlockwise (switching on anticlockwise and switching off clockwise) through the operating handle, the rotating ground rotating shaft 26 compresses the energy storage spring 18, and when the energy storage spring 18 is compressed to the centering position, the compression stroke is released by the energy storage spring 18 so as to drive the ground striking plate 27 to rotate. The output shaft 28 of the three-station mechanism is driven by the grounding striking plate 27 to rotate so as to drive the isolation switch of the main loop to be opened and closed.
Fig. 10 is a simplified description of the working principle of the present application, and fig. 10 shows the grounding connection, grounding separation, separation and separation, and main circuit connection sequentially from left to right. The main loop and the grounding loop are respectively provided with an insulating pull rod, namely a switch. An isolating and grounding three-station mechanism 13 is arranged between the main loop and the grounding loop, and a disconnecting link of the isolating and grounding three-station mechanism 13 can be connected with a contact of the main loop or a contact of the grounding loop. It can be seen from the figure that when the disconnecting link of the isolating and grounding three-position mechanism 13 is connected with the contacts of the grounding circuit, it is necessarily separated from the contacts of the main circuit, that is, the main circuit is in a non-connected state, that is, the grounding vacuum interrupter 7 is logically interlocked with the isolating disconnecting link 5, and the grounding circuit can be conducted only when the isolating disconnecting link 5 is in the isolating position, the grounding vacuum interrupter 7 is switched on. The reliability of the ground loop is ensured in a logical relationship.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the application.
Claims (9)
1. A three-position switch, comprising: a fixed contact (4) electrically connected with a main vacuum arc-extinguishing chamber (3) in a main circuit of the circuit breaker, an isolation contact (6) electrically connected with a grounding vacuum arc-extinguishing chamber (7) in a grounding circuit, an isolation disconnecting link (5) and an isolation grounding three-station mechanism (13) for driving the isolation disconnecting link (5) to conduct the main circuit in which the main vacuum arc-extinguishing chamber (3) is positioned when the fixed contact (4) is closed and conducting the grounding circuit when the isolation contact (6) is closed; the grounding vacuum arc-extinguishing chamber (7) is detachable on a grounding vacuum arc-extinguishing chamber installation position, when the grounding vacuum arc-extinguishing chamber (7) is not arranged on the grounding vacuum arc-extinguishing chamber installation position, the three-station switch further comprises a grounding contact seat (21) electrically connected with the grounding circuit, and the isolating grounding three-station mechanism (13) drives the isolating disconnecting link (5) to conduct a main circuit where the main vacuum arc-extinguishing chamber (3) is positioned when the isolating disconnecting link is closed with the fixed contact (4); when the isolating knife switch (5) is in an isolating position, the main loop and the grounding loop are disconnected; when the grounding contact seat (21) is closed, the grounding loop is conducted; the isolating disconnecting link (5) is arranged on a main loop isolating rotating shaft, and a three-station mechanism output shaft (28) of the isolating and grounding three-station mechanism (13) drives the main loop isolating rotating shaft to rotate through an intermediate transmission structure so as to drive the isolating disconnecting link (5) to rotate; the isolation grounding three-station mechanism (13) comprises: the three-station mechanism isolation rotating shaft (29), a three-station mechanism output shaft (28) and a grounding rotating shaft (26), wherein a first transmission mechanism is arranged between the three-station mechanism isolation rotating shaft (29) and the three-station mechanism output shaft (28), a second transmission mechanism is arranged on the grounding rotating shaft (26), and when a grounding contact seat (21) is connected in a grounding loop, the isolated grounding three-station mechanism (13) further comprises a third transmission mechanism arranged on the three-station mechanism output shaft (28), and the second transmission mechanism and the third transmission mechanism are matched for transmission to drive the three-station mechanism output shaft (28) to rotate; when the isolation fracture is separated, the isolation rotating shaft (29) of the three-station mechanism rotates clockwise or anticlockwise, and the output shaft (28) of the three-station mechanism is driven to rotate through the first transmission mechanism so as to drive the main loop isolation rotating shaft to be separated and combined; when the isolation contact knife is separated, the grounding rotating shaft (26) rotates clockwise or anticlockwise, and the second transmission mechanism drives the third transmission mechanism to drive the output shaft (28) of the three-station mechanism to rotate so as to drive the main loop isolation rotating shaft to be separated and combined; when the grounding vacuum arc extinguishing chamber (7) is connected in the grounding loop, the isolation grounding three-station mechanism (13) comprises a grounding output rotating shaft (22) and a fourth transmission mechanism arranged between the second transmission mechanism and the grounding output rotating shaft (22), and the second transmission mechanism and the fourth transmission mechanism are matched for transmission to drive the grounding output rotating shaft (22) to rotate; when the isolation fracture is separated, the isolation rotating shaft (29) of the three-station mechanism rotates clockwise or anticlockwise, and the output shaft (28) of the three-station mechanism is driven to rotate through the first transmission mechanism so as to drive the main loop isolation rotating shaft to be separated and combined; when the grounding vacuum arc extinguishing chamber (7) is grounded and separated, the grounding rotating shaft (26) rotates clockwise or anticlockwise, and the fourth transmission mechanism is driven by the second transmission mechanism to drive the grounding output rotating shaft (22) to rotate; the second transmission mechanism comprises a second elastic energy storage structure, a second transmission assembly and a grounding collision plate (27); after the rotating grounding rotating shaft (26) compresses the energy storage spring (18) in the second elastic energy storage structure to a neutral position, the energy storage spring (18) releases the compressed stroke and drives the grounding collision plate (27) to rotate through the second transmission assembly; the third transmission mechanism comprises a second crank arm arranged on the output shaft (28) of the three-station mechanism, and the grounding collision plate (27) rotates to collide with the second crank arm to rotate, so that the output shaft (28) of the three-station mechanism is driven to rotate, and the separation and the combination of the main loop isolation rotating shafts are realized; the fourth transmission mechanism comprises a crank, a connecting plate (23), a rotating piece arranged on a rotating shaft (24) and an arc connecting plate (25), wherein one end of the arc connecting plate (25) is hinged with the grounding collision plate (27), the other end of the arc connecting plate is hinged with the rotating piece, one end of the connecting plate (23) is hinged with the rotating piece, the other end of the connecting plate is connected with one end of the crank, and the other end of the crank is connected with the grounding output rotating shaft (22).
2. The three-position switch according to claim 1, wherein the first transmission mechanism comprises a first elastic energy storage structure, a first transmission assembly, an isolating striking plate (30) capable of rotating around a shaft, and a first crank arm fixedly integrated with an output shaft (28) of the three-position mechanism, when the main vacuum arc extinguishing chamber (3) is isolated and separated, the isolating rotating shaft (29) of the three-position mechanism rotates clockwise or anticlockwise to drive the energy storage spring (18) in the first elastic energy storage structure to a neutral position, after the energy storage spring (18) drives the first transmission assembly to drive the isolating striking plate (30) to rotate through the neutral position, the isolating striking plate (30) strikes the first crank arm to drive the output shaft (28) of the three-position mechanism to rotate, so that the isolating rotating shaft of the main circuit is driven to separate and combine.
3. The three-position switch according to claim 2, wherein a first roller (31) is arranged on the first crank arm, and the isolation striking plate (30) drives the first crank arm to rotate by striking the first roller (31).
4. A three-position switch according to claim 3, wherein the isolation striker plate (30) is U-shaped, and the first roller (31) is located in the U-shaped cavity of the isolation striker plate (30).
5. The three-position switch according to claim 2, wherein the first elastic energy storage structure and the second elastic energy storage structure are formed by the same elastic energy storage structure, and the three-position mechanism isolation rotating shaft (29) and the grounding rotating shaft (26) are respectively arranged at two ends of an energy storage spring (18) of the elastic energy storage structure.
6. The three-position switch according to claim 1, wherein a second roller (32) is arranged on the second crank arm, and the grounding striking plate (27) rotates to strike the second roller (32) to drive the second crank arm to rotate.
7. The three-position switch of claim 6, wherein the ground strike plate (27) is U-shaped and the second roller (32) is located in the U-shaped cavity of the ground strike plate (27).
8. The three-position switch according to any one of claims 1-7, characterized in that the main vacuum interrupter (3) and the ground vacuum interrupter (7) are arranged on an insulating support, the ground vacuum interrupter (7) is arranged below the main vacuum interrupter (3), and the axis of the ground vacuum interrupter (7) is arranged obliquely to the axis of the main vacuum interrupter (3).
9. The three-position switch of claim 8, wherein the insulating support is made of a nylon and fiberglass mixed composite or a plastic and fiberglass mixed composite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810132217.6A CN108321001B (en) | 2018-02-09 | 2018-02-09 | Three-station switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810132217.6A CN108321001B (en) | 2018-02-09 | 2018-02-09 | Three-station switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108321001A CN108321001A (en) | 2018-07-24 |
| CN108321001B true CN108321001B (en) | 2023-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810132217.6A Active CN108321001B (en) | 2018-02-09 | 2018-02-09 | Three-station switch |
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| Country | Link |
|---|---|
| CN (1) | CN108321001B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115547712B (en) * | 2022-12-01 | 2023-02-21 | 宁波天安智能电网科技股份有限公司 | Jointly-driven operating mechanism and isolation combined type circuit breaker |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201838500U (en) * | 2010-06-09 | 2011-05-18 | 广西银河迪康电气有限公司 | Operating device of three-station grounding disconnecting switch |
| CN103368096A (en) * | 2013-06-26 | 2013-10-23 | 国家电网公司 | Solid insulation ring main unit |
| CN103681092A (en) * | 2013-11-29 | 2014-03-26 | 国家电网公司 | Solid insulation isolation earthing switch device and fixing and encapsulating device thereof |
| CN207743142U (en) * | 2018-02-09 | 2018-08-17 | 浙江华仪电器科技有限公司 | A kind of three-station |
-
2018
- 2018-02-09 CN CN201810132217.6A patent/CN108321001B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201838500U (en) * | 2010-06-09 | 2011-05-18 | 广西银河迪康电气有限公司 | Operating device of three-station grounding disconnecting switch |
| CN103368096A (en) * | 2013-06-26 | 2013-10-23 | 国家电网公司 | Solid insulation ring main unit |
| CN103681092A (en) * | 2013-11-29 | 2014-03-26 | 国家电网公司 | Solid insulation isolation earthing switch device and fixing and encapsulating device thereof |
| CN207743142U (en) * | 2018-02-09 | 2018-08-17 | 浙江华仪电器科技有限公司 | A kind of three-station |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108321001A (en) | 2018-07-24 |
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