CN113990705B - Environment-friendly gas insulated switchgear and use method thereof - Google Patents
Environment-friendly gas insulated switchgear and use method thereof Download PDFInfo
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- CN113990705B CN113990705B CN202111305597.7A CN202111305597A CN113990705B CN 113990705 B CN113990705 B CN 113990705B CN 202111305597 A CN202111305597 A CN 202111305597A CN 113990705 B CN113990705 B CN 113990705B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H31/00—Air-break switches for high tension without arc-extinguishing or arc-preventing means
- H01H31/02—Details
- H01H31/04—Interlocking mechanisms
- H01H31/10—Interlocking mechanisms for interlocking two or more 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
- H01H33/02—Details
- H01H33/46—Interlocking mechanisms
- H01H33/52—Interlocking mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0352—Gas-insulated switchgear for three phase switchgear
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/075—Earthing arrangements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Gas-Insulated Switchgears (AREA)
Abstract
The invention relates to an environment-friendly gas insulated switchgear and a use method thereof, the equipment comprises an upper three-station isolating switch, a lower three-station isolating switch and a circuit breaker connected between the upper three-station isolating switch and the lower three-station isolating switch, wherein a circuit breaker operating mechanism of the circuit breaker is positioned between an upper isolating operating mechanism of the upper three-station isolating switch and a lower isolating operating mechanism of the lower three-station isolating switch, an upper interlocking device is arranged between the circuit breaker operating mechanism and the upper isolating operating mechanism, and a lower interlocking device is arranged between the circuit breaker operating mechanism and the lower isolating operating mechanism. Is suitable for various application occasions and has wide prospect.
Description
Technical Field
The invention relates to the technical field of insulated switches, in particular to environment-friendly gas insulated switchgear and a using method thereof.
Background
With the rapid development of gas insulated switchgear products in recent years, gas insulated switchgear is applied to power distribution systems such as power plants, substations, high-rise buildings, industrial and mining enterprises, subways, and the like. The research and the manufacture of environment-friendly gas insulated switchgear are firmly carried out to develop a new trend of high-quality products with ecological priority and green and low carbon.
The existing design scheme is a scheme of an upper three-station disconnecting switch and a lower circuit breaker, and the scheme of the upper three-station disconnecting switch and the circuit breaker realizes the mode of line side grounding as follows: the method comprises the following steps of opening a breaker, opening an upper three-station isolating switch to an isolating position, closing the upper three-station isolating switch to a connection position, judging whether a line side is electrified and displaying no electricity, and closing the breaker. The problems that exist are that: the line side grounding needs to be realized through the closing of the breaker, and the operation risk of not directly grounding exists.
Chain mode between current three-station isolator and the circuit breaker is the mode of the chain transfer line of installation on the circuit breaker transmission shaft, drives the transfer line and pins three-station isolator's manual operation hole when the circuit breaker closes a floodgate, but does not install reverse chain: namely, the mechanical linkage that the breaker can not be switched on when the three-station isolating switch is operated exists the operation hidden trouble.
Three station isolator under current design does not have, and is inconsistent with user's use habit, and conventional station circuit side ground connection all has independent earthing switch, does not pass through the circuit breaker combined floodgate, can guarantee reliable ground connection, and current scheme can't satisfy user's demand.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides environment-friendly gas insulated switchgear and a using method thereof, and the scheme of an upper three-position isolating switch, a breaker and a lower three-position isolating switch is adopted, so that the requirement of the user for overhauling and grounding is realized, the reliability of the product is met, and the operation is convenient.
The invention provides environment-friendly gas insulated switchgear, which is realized by the following technical scheme and comprises an upper three-position isolating switch, a lower three-position isolating switch and a circuit breaker connected between the upper three-position isolating switch and the lower three-position isolating switch, wherein a circuit breaker operating mechanism of the circuit breaker is positioned between an upper isolating operating mechanism of the upper three-position isolating switch and a lower isolating operating mechanism of the lower three-position isolating switch, an upper interlocking device is arranged between the circuit breaker operating mechanism and the upper isolating operating mechanism, and a lower interlocking device is arranged between the circuit breaker operating mechanism and the lower isolating operating mechanism.
Three station isolator, three station isolator and circuit breaker establish ties down between this scheme, and the interlock is equipped with between circuit breaker operating device and the last isolation operating mechanism, and when making circuit breaker operating device be in the circuit breaker combined floodgate state, go up the interlock and make and keep apart the unable operation of operating mechanism on, when going up isolation operating mechanism operation, the unable manual combined floodgate of circuit breaker operating device. The lower interlocking device is arranged between the circuit breaker operating mechanism and the lower isolation operating mechanism, so that when the circuit breaker operating mechanism is in a circuit breaker closing state, the lower interlocking device enables the lower isolation operating mechanism not to operate, and when the lower isolation operating mechanism operates, the circuit breaker operating mechanism cannot be manually closed. Thereby ensuring the safety of operation.
As optimization, the upper interlocking device comprises an upper shifting fork plate and a guide rod, wherein the upper shifting fork plate slides transversely, the guide rod slides vertically, an upper alignment hole is formed in the upper shifting fork plate, the upper alignment hole is aligned with the operation hole of the upper isolation operation mechanism after sliding left and right, an upper conversion mechanism is arranged between the upper shifting fork plate and the guide rod, and the guide rod is pressed downwards through the upper conversion mechanism after the upper shifting fork plate slides left and right; the lower interlocking device comprises a lower shifting fork plate which slides transversely and a push rod which slides vertically, a lower alignment hole which is aligned with the operation hole of the lower isolation operating mechanism after sliding left and right is formed in the lower shifting fork plate, the lower interlocking device also comprises a lower shifting fork plate locking device, and the push rod limits the lower shifting fork plate to slide left and right after moving downwards; an upper convex rod which is propped against the lower end of the guide rod and a lower boss which presses the push rod are fixedly connected to a breaker operation main shaft of the breaker operation mechanism.
When circuit breaker operating device is in the combined floodgate state, last protruding pole top on the circuit breaker operating main shaft makes the guide bar can't move down at the guide bar lower extreme, thereby it can't remove about the declutch shift board to make through last change mechanism, thereby it can't keep apart the operating hole of operating mechanism with last alignment hole to make, manual operation handle can't insert the operating hole of keeping apart operating mechanism, thereby can't realize keeping apart operating mechanism's operation, when circuit breaker operating device is in the separating brake state, the last protruding pole rotation of circuit breaker operating main shaft dodges the guide bar, thereby can remove about and move the declutch shift board.
When the circuit breaker operating mechanism is in a closing state, the lower boss presses the push rod downwards, and the lower shifting fork plate is limited to slide left and right through the lower shifting fork plate locking device, so that the lower aligning hole cannot be aligned with the operating hole of the lower isolation operating mechanism, the manual operating handle cannot be inserted into the operating hole of the lower isolation operating mechanism, and the operation of the lower isolation operating mechanism cannot be realized.
As an optimization, go up the conversion mechanism and include the horizontal hub connection in the last pivot of circuit breaker operating device top, go up the rigid coupling have with last pivot eccentric last driving lever on the pivot, go up and open on the declutch shift plate and hold last driving lever groove that the driving lever was inserted, go up the pivot and be equipped with the last gyro wheel that is located last pivot both sides, two go up the gyro wheel and all be located the guide bar top. In this scheme, the upper deflector rod inserts the poking rod groove, when the last declutch shift plate moves about, it removes to drive the upper deflector rod through last declutch shift groove, thereby it rotates to drive the upper shaft, through last gyro wheel pushing down the guide bar of last pivot both sides, when going up declutch shift plate and moving left, left last gyro wheel pushing down the guide bar, when going up declutch shift plate and moving right, the last gyro wheel on right side pushes down the guide bar, when circuit breaker operating device is in the combined floodgate state, the epaxial last nose bar top of circuit breaker operation is at the guide bar lower extreme, thereby make the last gyro wheel of both sides all can't push down, make and go up declutch shift plate and can't remove about.
Preferably, the lower shifting fork plate locking device comprises a stop lever which swings up and down, a groove is formed in the lower shifting fork plate, the stop lever is connected with the push rod, and the push rod drives the stop lever to be inserted into the groove after moving downwards. In the scheme, the push rod drives the stop lever to be inserted into the groove after moving downwards, so that the lower shifting fork plate cannot move left and right.
Preferably, the guide rod is provided with a guide rod spring which pushes the guide rod upwards, and the push rod is provided with a compression spring which pushes the push rod upwards. The guide bar spring in this scheme upwards promotes the guide bar, goes up the nose bar and separates the back with the guide bar, makes the guide bar keep in the upper end position, and the nose bar return of being convenient for, compression spring upwards promotes the push rod, and when making the boss dodge the push rod down, the push rod return of upwards being convenient for makes the pin deviate from the recess.
As optimization, a button switch plate leaning against the back of the button switch of the circuit breaker is hinged in the circuit breaker operating mechanism; the upper interlocking device also comprises a switch locking device connected with the upper guide rod, and the upper guide rod is propped against the back of the button switch plate through the switch locking device after moving downwards; the lower interlocking device further comprises a vertically sliding interlocking rod, a lower switching mechanism is installed between the lower shifting fork plate and the interlocking rod, the interlocking rod is pressed upwards through the lower switching mechanism after the lower shifting fork plate slides leftwards and rightwards, and the interlocking rod pushes against the back face of the button switch plate after moving upwards.
The button switch board in this scheme leans on at the circuit breaker button switch back, and when circuit breaker button switch pressed, can promote the button switch board and swing backward, when last isolation operating mechanism operation, goes up the declutch shift board and drives the guide bar and move down, goes up the guide bar and drives switch locking device top at the button switch board back to make circuit breaker button switch can't press, make the unable operation of circuit breaker operating mechanism.
When the lower isolation operating mechanism is operated, the lower shifting fork plate moves left and right, the interlocking rod is pressed upwards through the lower conversion mechanism after the lower shifting fork plate slides left and right, and the interlocking rod moves upwards and then abuts against the back of the button switch plate, so that the button switch of the circuit breaker cannot be pressed down, and the circuit breaker operating mechanism cannot be operated when the upper isolation operating mechanism or the lower isolation operating mechanism is operated.
Preferably, the switch locking device comprises a rotating rod hinged in the circuit breaker operating mechanism and a connecting rod fixedly connected with the upper guide rod, a sliding groove allowing the connecting rod to penetrate through is formed in the rotating rod, and one end of the rotating rod is pushed against the back face of the button switch board through the connecting rod after the upper guide rod moves downwards. Connecting rod and last guide bar rigid coupling in this scheme, go up the guide bar and drive the one end top of bull stick at the button switch board back through the connecting rod after the downstream.
As optimization, lower changeover mechanism includes the lower pivot of horizontal hub connection in circuit breaker operating device below, the rigid coupling has with lower eccentric dialling bar of pivot down in the pivot down, it has the lower dialling bar groove of holding down the driving lever male to open on the declutch shift plate down, be equipped with the lower gyro wheel that is located lower pivot both sides down on the pivot down, two the gyro wheel all is located the interlocking lever below. Lower shifting rod in this scheme inserts lower shifting rod groove, when controlling about declutch shift plate, moves down shifting rod through lower shifting rod groove drive to the pivot rotates down in the drive, through the lower gyro wheel of lower pivot both sides upwards presses the interlocking lever, and when declutch shift plate moved left, left lower gyro wheel upwards presses the interlocking lever, and when declutch shift plate moved right, the lower gyro wheel on right side upwards presses the interlocking lever.
As an optimization, the upper interlocking device further comprises a fixed upper limiting plate, the upper limiting plate is located on the outer side of the upper shifting fork plate, an upper fixing hole aligned with the upper isolation operating mechanism operation hole is formed in the upper limiting plate, the lower interlocking device further comprises a fixed lower limiting plate, the lower limiting plate is located on the outer side of the lower shifting fork plate, and a lower fixing hole aligned with the lower isolation operating mechanism operation hole is formed in the lower limiting plate. In the scheme, the upper fixing hole is aligned with the upper isolation operating mechanism operating hole, and the lower fixing hole is aligned with the lower isolation operating mechanism operating hole, so that the manual operating handle is guided.
The use method of the environment-friendly gas insulated switchgear comprises the following steps:
a. during power failure operation: firstly, operating a breaker operating mechanism to adjust the breaker to an opening state, only when the breaker is in the opening position, operating a lower three-station isolating switch to an isolating position, then operating an upper three-station isolating switch to the isolating position, and finally operating the lower three-station isolating switch to a grounding position to realize the grounding of a line side;
b. during power transmission operation: firstly, operating a lower three-station isolating switch to an isolating position, then operating an upper three-station isolating switch to a switch-on position, then operating the lower three-station isolating switch to the switch-on position, and finally operating a circuit breaker operating mechanism to adjust the circuit breaker to a switch-on position so as to realize power transmission operation;
c. when the circuit breaker is in a switching-on position, the upper convex rod on the circuit breaker operation main shaft is propped against the lower end of the guide rod, so that the guide rod cannot move downwards, the upper shifting fork plate cannot move leftwards and rightwards through the upper conversion mechanism, the upper alignment hole cannot be aligned with the operation hole of the upper isolation operating mechanism, the manual operation handle cannot be inserted into the operation hole of the upper isolation operating mechanism, and the operation of the upper isolation operating mechanism cannot be realized;
d. when the circuit breaker is in a switching-on position, the push rod is pressed downwards through a lower boss on the circuit breaker operation main shaft, and the lower shifting fork plate is limited to slide left and right through the lower shifting fork plate locking device, so that the lower alignment hole cannot be aligned with the operation hole of the lower isolation operating mechanism, and the manual operation handle cannot be inserted into the operation hole of the lower isolation operating mechanism, so that the operation of the lower isolation operating mechanism cannot be realized;
e. when the upper three-station disconnecting switch is operated, the circuit breaker is firstly adjusted to a brake separating position, the upper aligning hole is aligned with the operating hole of the upper isolation operating mechanism through the left and right movement of the upper shifting fork plate, then the upper shifting fork plate is inserted into the operating hole of the upper isolation operating mechanism through the manual operating handle, the upper shifting fork plate drives the upper guide rod to move downwards through the upper converting mechanism, the upper guide rod drives the switch locking device to be propped against the back surface of the button switch plate, so that the button switch of the circuit breaker cannot be pressed down, and the operating mechanism of the circuit breaker cannot be operated;
f. when the lower three-station disconnecting switch is operated, the circuit breaker is firstly adjusted to a switching-off position, the lower shifting fork plate moves left and right, the lower alignment hole is aligned with the lower isolation operating mechanism operating hole, then the lower isolation operating mechanism operating hole is inserted through the manual operating handle, the lower shifting fork plate slides left and right at the moment, the interlocking rod is pressed upwards through the lower switching mechanism, the interlocking rod moves upwards and then props against the back of the button switch plate, and therefore the button switch of the circuit breaker cannot be pressed down, and the circuit breaker operating mechanism cannot be operated.
The beneficial effects of the invention are as follows: according to the environment-friendly gas insulated switchgear and the using method thereof, the overall structural scheme is adjusted, the installation transmission mode of the existing three-station isolating switch operating mechanism is changed, a novel interlocking mechanism is adopted, and the condition that a circuit breaker is mistakenly closed in the operating process of the three-station isolating switch is avoided. The lower three-station isolating switch is added, the problem that the circuit breaker needs to be closed when the circuit side is grounded is solved, and the circuit side can be directly grounded through the lower three-station isolating switch. The process route is simple and the production efficiency is high. The method is novel in thought and very suitable for modern rapid large-scale production. The environment-friendly gas insulated switchgear is independently designed for our company, has unique appearance, compact structure, environmental protection and energy conservation, integrated scheme linkage reliability, complete anti-misoperation function, convenient operation of operators, high reliability of field operation and maintenance, and comprehensive guarantee of personal safety of the operators. Is suitable for various application occasions and has wide prospect.
Drawings
FIG. 1 is a schematic view of the internal structure of the present invention;
fig. 2 is a schematic structural view of an operating mechanism of the circuit breaker of the present invention;
fig. 3 is a schematic view of another state structure of the circuit breaker operating mechanism of the present invention;
FIG. 4 is a schematic view of the upper interlock arrangement of the present invention;
FIG. 5 is a schematic view of the lower interlock apparatus of the present invention;
figure 6 is a side view of the circuit breaker operating mechanism of the present invention;
fig. 7 is a side view of the circuit breaker push button switch of the present invention;
FIG. 8 is an elevational view of the upper isolation actuator of the present invention;
FIG. 9 is an elevational view of the lower isolation actuator of the present invention;
shown in the figure:
1. instrument room, 2, cable room, 3, bus room, 4, pressure relief channel, 5, plenum chamber, 6, breaker operating mechanism, 7, lower isolation operating mechanism, 8, upper isolation operating mechanism, 9, upper three-position isolation switch, 10, lower three-position isolation switch, 11, breaker, 12, mounting plate, 13, upper interlocking device, 14, lower interlocking device, 15, upper turning shaft, 16, upper deflector rod, 17, interlocking rod, 18, handle, 19, upper fork plate, 20, upper limiting plate, 21, positioning shaft, 22, upper chute, 23, upper alignment hole, 24, upper fixing hole, 25, upper roller, 26, left fixing plate, 27, right fixing plate, 28, lower fork plate, 29, lower limiting plate, 30, lower chute, 31, stop lever, 32, push rod, 33, pin shaft, 34, groove, 35, lower alignment hole, 36, lower fixing hole, 37, breaker operating main shaft, 39. the lower boss 40, the upper convex rod 41, the circuit breaker operating motor 42, the push rod mounting plate 43, the push rod chute 44, the guide plate 45, the guide rod 46, the compression spring 47, the connecting rod 48, the rotating rod 49, the chute 50, the rotating rod pin shaft 51, the button switch plate 52, the circuit breaker button switch 53, the interlocking plate 54, the upper fixing plate 55, the lower rotating shaft 56, the lower deflector rod 57 and the lower roller.
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 to 9, the environment-friendly gas insulated switchgear of the present invention includes an upper three-position disconnecting switch 9, a lower three-position disconnecting switch 10, and a circuit breaker 11 connected between the upper three-position disconnecting switch 9 and the lower three-position disconnecting switch 10, and further includes an instrument room 1, a cable room 2, a bus room 3, a pressure relief channel 4, a plenum chamber 5, a circuit breaker operating mechanism 6, a lower isolation operating mechanism 7, an upper isolation operating mechanism 8, and a mounting plate 12.
As shown in fig. 1, the upper isolation operating mechanism 8, the lower isolation operating mechanism 7 and the circuit breaker operating mechanism 6 are fixedly connected to the mounting plate 12, and when the switchgear is assembled, the upper isolation operating mechanism 8, the lower isolation operating mechanism 7 and the circuit breaker operating mechanism 6 can be mounted on the plenum chamber 5 together with the mounting plate 12 after debugging is completed, so that the assembly efficiency is improved.
The circuit breaker operating mechanism 6 of the circuit breaker 11 is located between an upper isolation operating mechanism 8 of an upper three-position isolating switch 9 and a lower isolation operating mechanism 7 of a lower three-position isolating switch 10, an upper interlocking device 13 is installed between the circuit breaker operating mechanism 6 and the upper isolation operating mechanism 8, and a lower interlocking device 14 is installed between the circuit breaker operating mechanism 6 and the lower isolation operating mechanism 7.
As shown in fig. 4, the upper interlocking device 13 includes an upper shifting fork plate 19 that slides horizontally and a guide rod 45 that slides vertically, a handle 18 is fixedly connected to a front end surface of the upper shifting fork plate 19, the upper shifting fork plate 19 is connected to the upper isolation operating mechanism 8 through a positioning shaft 21, a horizontal upper chute 22 is provided on the upper shifting fork plate 19, the positioning shaft 21 is located in the upper chute 22, and the upper shifting fork plate 19 can horizontally move left and right by pushing the handle 18.
The upper shifting fork plate 19 is provided with an upper aligning hole 23 which slides left and right and is aligned with the operating hole of the upper isolation operating mechanism 8, the upper aligning hole 23 comprises a left round hole and a right round hole, when the upper shifting fork plate 19 is positioned at the middle position, the operating hole of the upper isolation operating mechanism 8 is positioned between the two round holes, the operating handle cannot be inserted into the operating hole of the upper isolation operating mechanism 8, and when the upper shifting fork plate 19 moves left and right, any one of the left round hole and the right round hole is aligned with the operating hole of the upper isolation operating mechanism 8.
The upper interlocking device 13 further comprises a fixed upper limiting plate 20, the upper limiting plate 20 is located outside (i.e. in front of) the upper fork plate 19, and an upper fixing hole 24 aligned with the operation hole of the upper isolation operating mechanism 8 is formed in the upper limiting plate 20.
As shown in fig. 2, the guide plate 44 is fixedly connected to the circuit breaker operating mechanism 6, the guide rod 45 vertically penetrates through the guide plate 44, a guide rod spring for pushing the guide rod 45 upwards is mounted on the guide rod 45, the guide rod spring is mounted at the guide plate 44, the lower end of the guide rod spring is supported on the guide plate 44, and the guide rod spring is sleeved on the guide rod 45 and the upper end of the guide rod spring is supported on a pin shaft on the side surface of the guide rod 45.
An upper switching mechanism is arranged between the upper shifting fork plate 19 and the guide rod 45, and the guide rod 45 is pressed downwards through the upper switching mechanism after the upper shifting fork plate 19 slides left and right.
As shown in fig. 4, the upper conversion mechanism includes an upper rotating shaft 15 horizontally axially connected above the circuit breaker operating mechanism 6, an upper fixing plate 54 is fixedly connected with the upper end face of the circuit breaker operating mechanism 6, the rotating shaft 15 is axially connected to the upper fixing plate 54, an upper shift lever 16 eccentric to the upper rotating shaft 15 is fixedly connected to the upper rotating shaft 15, the upper shift lever 16 is located above the upper rotating shaft 15, an upper shift lever groove for accommodating the upper shift lever 16 to be inserted is formed in the upper fork plate 19, the upper shift lever groove is a vertical long groove, and when the upper fork plate 19 moves left and right, the upper shift lever 16 drives the upper rotating shaft 15 to rotate.
The upper rotating shaft 15 is provided with upper rollers 25 positioned at two sides of the upper rotating shaft 15, the two upper rollers 25 are bilaterally symmetrical relative to the upper rotating shaft 15, and when the upper shifting fork plate 19 is positioned at the middle position, the two upper rollers 25 are consistent in height.
As shown in fig. 8, the two upper rollers 25 are located above the guide rod 45, an interlocking plate 53 is fixedly connected to the upper end of the guide rod 45, and the two upper rollers 25 are attached to the upper end surface of the interlocking plate 53.
The circuit breaker operation motor 41 drives the circuit breaker operation main shaft 37 to rotate, an upper protruding rod 40 which is propped against the lower end of the guide rod 45 is fixedly connected to the circuit breaker operation main shaft 37 of the circuit breaker operation mechanism 6, and when the circuit breaker operation mechanism 6 is located in a closing state, the upper protruding rod 40 is propped against the lower end of the guide rod 45, so that the upper protruding rod 40 cannot move downwards, and the upper shifting fork plate 19 cannot move leftwards and rightwards. When the circuit breaker operating mechanism 6 is in the open state, the upper protruding rod 40 is separated from the guide rod, so that the upper protruding rod 40 can move downwards, and the upper fork plate 19 can move leftwards and rightwards.
As shown in fig. 7, the breaker operating mechanism 6 is hinged with a button switch board 51 leaning against the back of the breaker button switch 52, the left lower end of the button switch board 51 is hinged with the breaker operating mechanism 6, and when the breaker button switch 52 is pressed, the button switch board 51 is driven to swing backwards.
The upper interlock device 13 further includes a switch locking device connected to the upper guide rod 45, and the upper guide rod 45 is pushed against the back of the button switch plate 51 by the switch locking device after moving downward. As shown in fig. 2 and 6, the switch locking device includes a rotary lever 48 hinged in the circuit breaker operating mechanism 6 and a link 47 fixedly connected to the upper guide bar 45, the rotary lever 48 being located behind the push switch plate 51.
The middle part of the rotating rod 48 is hinged with the circuit breaker operating mechanism 6 through a rotating rod pin shaft 50, a sliding groove 49 allowing the connecting rod 47 to penetrate is formed in the rotating rod 48, the sliding groove 49 is located at the rear end of the rotating rod 48, and the upper guide rod 45 drives the front end of the rotating rod 48 to be propped against the back surface of the button switch board 51 through the connecting rod 47 after moving downwards. So that the button switch plate 51 cannot rotate around the shaft, the breaker button switch 52 cannot be pressed down, the closing operation cannot be carried out, and the reverse interlocking of the upper isolation operating mechanism 8 to the breaker operating mechanism 6 is realized.
As shown in fig. 5, the lower interlock device 14 includes a lower fork plate 28 that slides laterally and a push rod 32 that slides vertically.
The front end face of the lower shifting fork plate 28 is fixedly connected with a handle, the lower shifting fork plate 28 is connected with the lower isolation operating mechanism 7 through a positioning shaft, a transverse lower chute 30 is arranged on the lower shifting fork plate 28, the positioning shaft is positioned in the lower chute 30, and the lower shifting fork plate 28 can horizontally move leftwards and rightwards through pushing the handle.
The lower shifting fork plate 28 is provided with a lower aligning hole 35 which is aligned with the operation hole of the lower isolation operation mechanism 7 after sliding left and right, the lower interlocking device 14 further comprises a fixed lower limiting plate 29, the lower limiting plate 29 is positioned at the outer side of the lower shifting fork plate 28, and the lower limiting plate 29 is provided with a lower fixing hole 36 which is aligned with the operation hole of the lower isolation operation mechanism 7. The lower aligning hole 35 includes a left circular hole and a right circular hole, when the lower fork plate 28 is located at the middle position, the operation hole of the lower isolation operation mechanism 7 is located between the two circular holes, the operation handle cannot be inserted into the operation hole of the lower isolation operation mechanism 7, and when the lower fork plate 28 moves left and right, any one of the left circular hole and the right circular hole is aligned with the operation hole of the lower isolation operation mechanism 7.
As shown in fig. 2, the push rod 32 penetrates through a bottom plate of the circuit breaker operating mechanism 6, a push rod mounting plate 42 is fixed on the circuit breaker operating mechanism 6, the push rod 32 is connected with the push rod mounting plate 42 through a positioning pin shaft, a push rod chute 43 is arranged on the push rod 32, the push rod 32 can move up and down relative to the push rod mounting plate 42 through the push rod chute 43, and a compression spring 46 for pushing the push rod 32 upwards is arranged on the push rod 32.
A lower boss 39 of the push-down lever 32 is fixedly connected to the breaker operating main shaft 37 of the breaker operating mechanism 6. The outer ring of the lower boss 39 is arc-shaped, the distance between each point of the arc-shaped and the center of the breaker operation main shaft 37 is gradually increased, the lower end of the lower boss 39 abuts against the upper end face of the push rod 32, when the breaker operation mechanism 6 is located at a switch-on position, the lower boss 39 presses the push rod 32 downwards, and when the breaker operation mechanism 6 is located at a switch-off position, the compression spring 46 drives the push rod 32 to move upwards.
As shown in fig. 6, the lower interlock device 14 further includes a lower fork plate locking device, and the push rod 32 limits the lower fork plate 28 to slide left and right after moving downward; the lower shifting fork plate locking device comprises a stop lever 31 capable of swinging up and down, the middle position of the stop lever 31 is hinged to a right fixing plate 27, the right fixing plate 27 is fixed on the lower end face of the circuit breaker operating mechanism 6, the right end of the stop lever 31 is connected with a push rod 32, the push rod 32 is inserted into a long groove in the right end of the stop lever 31 through a pin shaft 33, and therefore the stop lever 31 is driven to swing up and down through the push rod 32.
As shown in fig. 6, a groove 34 is formed in the lower fork 28, the opening of the groove 34 is downward, the left end of the stop lever 31 is located below the groove 34, and the push rod 32 moves downward to drive the stop lever 31 to be inserted into the groove 34.
As shown in fig. 9, the lower interlock device 14 further includes an interlock rod 17 that slides vertically, a lower switching mechanism is installed between the lower fork plate 28 and the interlock rod 17, and the interlock rod 17 is pressed upward by the lower switching mechanism after the lower fork plate 28 slides left and right.
As shown in fig. 7, the interlock lever 17 moves upward and abuts against the rear surface of the push switch plate 51, and since the left lower end of the push switch plate 51 is hinged to the breaker operating mechanism 6, the upper end of the interlock lever 17 abuts against the right lower side of the push switch plate 51.
As shown in fig. 9, lower switching mechanism is the same with the structure of last switching mechanism, lower switching mechanism includes that the horizontal hub connection is in lower pivot 55 of circuit breaker operating device 6 below, and lower pivot 55 hub connection is on left fixed plate 26, and left fixed plate 26 rigid coupling is terminal surface under circuit breaker operating device 6, the rigid coupling has lower poking rod 56 with lower pivot 55 off-centre down on the lower pivot 55, it has the lower poking rod groove of holding down poking rod 56 male to open on the lower fork plate 28, be equipped with the lower gyro wheel 57 that is located lower pivot 55 both sides, two on the lower pivot 55 lower gyro wheel 57 all is located the interlocking bar 17 below, and the below rigid coupling of interlocking bar 17 has the interlocking flat board, two the terminal surface laminating under gyro wheel 57 all with the flat board.
The use method of the environment-friendly gas insulated switchgear comprises the following steps:
during power failure operation: the circuit breaker operating mechanism 6 is operated to adjust the circuit breaker 11 to the opening state, only when the circuit breaker 11 is located at the opening position, the lower three-position isolating switch 10 can be operated to the isolating position, then the upper three-position isolating switch 9 is operated to the isolating position, and finally the lower three-position isolating switch 10 is operated to the grounding position, so that the circuit side grounding is realized.
During power transmission operation: firstly, the lower three-position disconnecting switch 10 is operated to an isolating position, then the upper three-position disconnecting switch 9 is operated to a switch-on position, then the lower three-position disconnecting switch 10 is operated to the switch-on position, and finally the circuit breaker operating mechanism 6 is operated to adjust the circuit breaker 11 to a switch-on position, so that power transmission operation is realized.
When the circuit breaker 11 is in the closing position, the upper convex rod on the circuit breaker operation main shaft is propped against the lower end of the guide rod, so that the guide rod cannot move downwards, the upper shifting fork plate cannot move leftwards and rightwards through the upper conversion mechanism, the upper alignment hole cannot be aligned with the operation hole of the upper isolation operating mechanism, the manual operation handle cannot be inserted into the operation hole of the upper isolation operating mechanism, and the operation of the upper isolation operating mechanism cannot be realized.
When the circuit breaker 11 is in the closing position, the push rod is pressed downwards through the lower boss on the circuit breaker operation main shaft, and the lower shifting fork plate is limited to slide left and right through the lower shifting fork plate locking device, so that the lower alignment hole cannot be aligned with the operation hole of the lower isolation operating mechanism, the manual operation handle cannot be inserted into the operation hole of the lower isolation operating mechanism, and the operation of the lower isolation operating mechanism cannot be realized.
When the three-station isolating switch 9 is operated, the breaker 11 is firstly adjusted to a brake separating position, the upper aligning hole is aligned with the operating hole of the upper isolating operating mechanism through the left and right movement of the upper shifting fork plate, then the operating hole of the upper isolating operating mechanism is inserted through the manual operating handle, the upper shifting fork plate drives the upper guide rod to move downwards through the upper converting mechanism, the upper guide rod drives the switch locking device to be propped against the back surface of the button switch plate, so that the button switch of the breaker cannot be pressed down, and the operating mechanism of the breaker cannot be operated.
When the lower three-station disconnecting switch 10 is operated, the circuit breaker 11 is firstly adjusted to a switching-off position, the lower shifting fork plate moves left and right, the lower alignment hole is aligned with the lower isolation operating mechanism operation hole, then the lower isolation operating mechanism operation hole is inserted through the manual operation handle, the lower shifting fork plate slides left and right at the moment, the interlocking rod is pressed upwards through the lower switching mechanism, the interlocking rod moves upwards and then abuts against the back of the button switch plate, and therefore the circuit breaker button switch cannot be pressed down, and the circuit breaker operation mechanism cannot be operated.
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 (6)
1. The utility model provides an environment-friendly gas insulated switchgear which characterized in that: the circuit breaker comprises an upper three-position isolating switch (9), a lower three-position isolating switch (10) and a circuit breaker (11) connected between the upper three-position isolating switch (9) and the lower three-position isolating switch (10), wherein a circuit breaker operating mechanism (6) of the circuit breaker (11) is positioned between an upper isolating operating mechanism (8) of the upper three-position isolating switch (9) and a lower isolating operating mechanism (7) of the lower three-position isolating switch (10), an upper interlocking device (13) is arranged between the circuit breaker operating mechanism (6) and the upper isolating operating mechanism (8), and a lower interlocking device (14) is arranged between the circuit breaker operating mechanism (6) and the lower isolating operating mechanism (7);
the upper interlocking device (13) comprises an upper shifting fork plate (19) which slides transversely and a guide rod (45) which slides vertically, an upper aligning hole (23) which slides left and right and is aligned with an operation hole of the upper isolation operating mechanism (8) is formed in the upper shifting fork plate (19), an upper conversion mechanism is arranged between the upper shifting fork plate (19) and the guide rod (45), and the guide rod (45) is pressed down through the upper conversion mechanism after the upper shifting fork plate (19) slides left and right;
the lower interlocking device (14) comprises a lower shifting fork plate (28) which slides transversely and a push rod (32) which slides vertically, a lower aligning hole (35) which slides left and right and is aligned with an operating hole of the lower isolation operating mechanism (7) is formed in the lower shifting fork plate (28), the lower interlocking device (14) further comprises a lower shifting fork plate locking device, and the push rod (32) moves downwards and then limits the lower shifting fork plate (28) to slide left and right through the lower shifting fork plate locking device;
an upper convex rod (40) which is propped against the lower end of the guide rod (45) and a lower convex platform (39) which presses the push rod (32) are fixedly connected to a breaker operation main shaft (37) of the breaker operation mechanism (6);
the upper switching mechanism comprises an upper rotating shaft (15) which is transversely connected above the circuit breaker operating mechanism (6) in a shaft coupling mode, an upper deflector rod (16) which is eccentric to the upper rotating shaft (15) is fixedly connected onto the upper rotating shaft (15), an upper deflector rod groove for inserting the upper deflector rod (16) is formed in an upper fork plate (19), upper rollers (25) which are positioned on two sides of the upper rotating shaft (15) are arranged on the upper rotating shaft (15), and the two upper rollers (25) are positioned above a guide rod (45);
a button switch plate (51) leaning against the back surface of a breaker button switch (52) is hinged in the breaker operating mechanism (6);
the upper interlocking device (13) further comprises a switch locking device connected with the guide rod (45), and the guide rod (45) is propped against the back of the button switch plate (51) through the switch locking device after moving downwards;
the lower interlocking device (14) further comprises an interlocking rod (17) which slides vertically, a lower switching mechanism is arranged between the lower shifting fork plate (28) and the interlocking rod (17), the interlocking rod (17) is pressed upwards through the lower switching mechanism after the lower shifting fork plate (28) slides left and right, and the interlocking rod (17) moves upwards and then props against the back surface of the button switch plate (51);
lower changeover mechanism includes that the horizontal hub joint is in lower pivot (55) of circuit breaker operating device (6) below, the rigid coupling has lower driving lever (56) with lower pivot (55) off-centre down on lower pivot (55), it has lower driving lever groove down of holding down driving lever (56) male to open on lower declutch shift plate (28), be equipped with lower gyro wheel (57) that are located pivot (55) both sides down on lower pivot (55), two gyro wheel (57) all are located interlocking lever (17) below down.
2. The environment-friendly gas-insulated switchgear device according to claim 1, characterized in that: lower declutch shift board locking device includes pin (31) of luffing motion, it has recess (34) to open on declutch shift board (28) down, pin (31) are connected with push rod (32), push rod (32) move down after drive pin (31) insert in recess (34).
3. The environment-friendly gas-insulated switchgear device according to claim 1, characterized in that: the guide rod (45) is provided with a guide rod spring which pushes the guide rod (45) upwards, and the push rod (32) is provided with a compression spring (46) which pushes the push rod (32) upwards.
4. The environment-friendly gas-insulated switchgear device according to claim 1, characterized in that: the switch locking device comprises a rotating rod (48) hinged in the circuit breaker operating mechanism (6) and a connecting rod (47) fixedly connected with a guide rod (45), a sliding groove (49) allowing the connecting rod (47) to penetrate is formed in the rotating rod (48), and one end of the rotating rod (48) is pushed against the back face of a button switch plate (51) through the connecting rod (47) after the guide rod (45) moves downwards.
5. The environment-friendly gas-insulated switchgear device according to claim 1, characterized in that: go up interlock (13) still including fixed last spacing board (20), go up spacing board (20) and be located declutch shift board (19) outside, go up spacing board (20) go up to open and have last fixed orifices (24) of keeping apart operating mechanism (8) operation pore pair with last, interlock (14) still includes fixed lower spacing board (29) down, lower spacing board (29) are located declutch shift board (28) outside down, it has lower fixed orifices (36) of keeping apart operating mechanism (7) operation pore pair down to open on lower spacing board (29).
6. A method for using the environment-friendly gas insulated switchgear according to any one of claims 1 to 5, comprising the steps of:
a. during power failure operation: firstly, operating a breaker operating mechanism (6) to adjust a breaker (11) to a breaking state, only when the breaker (11) is in the breaking position, operating a lower three-position isolating switch (10) to an isolating position, then operating an upper three-position isolating switch (9) to the isolating position, and finally operating the lower three-position isolating switch (10) to a grounding position to realize line side grounding;
b. during power transmission operation: firstly, operating a lower three-station disconnecting switch (10) to an isolating position, then operating an upper three-station disconnecting switch (9) to a switch-on position, then operating the lower three-station disconnecting switch (10) to the switch-on position, and finally operating a circuit breaker operating mechanism (6) to adjust a circuit breaker (11) to a switch-on position to realize power transmission operation;
c. when the circuit breaker (11) is at a switching-on position, the upper convex rod on the circuit breaker operation main shaft is propped against the lower end of the guide rod, so that the guide rod cannot move downwards, the upper shifting fork plate cannot move left and right through the upper conversion mechanism, the upper alignment hole cannot be aligned with the operation hole of the upper isolation operating mechanism, and the manual operation handle cannot be inserted into the operation hole of the upper isolation operating mechanism, so that the operation of the upper isolation operating mechanism cannot be realized;
d. when the circuit breaker (11) is in a switching-on position, the push rod is pressed downwards through a lower boss on an operation main shaft of the circuit breaker, and the lower shifting fork plate is limited to slide left and right through a lower shifting fork plate locking device, so that a lower alignment hole cannot be aligned with an operation hole of a lower isolation operating mechanism, a manual operation handle cannot be inserted into the operation hole of the lower isolation operating mechanism, and the operation of the lower isolation operating mechanism cannot be realized;
e. when the upper three-station disconnecting switch (9) is operated, the circuit breaker (11) is firstly adjusted to a brake separating position, the upper aligning hole is aligned with the operating hole of the upper isolating operating mechanism through the left and right movement of the upper shifting fork plate, then the upper aligning hole is inserted into the operating hole of the upper isolating operating mechanism through the manual operating handle, at the moment, the upper shifting fork plate drives the guide rod to move downwards through the upper converting mechanism, and the guide rod drives the switch locking device to be propped against the back surface of the button switch plate, so that the button switch of the circuit breaker cannot be pressed down, and the operating mechanism of the circuit breaker cannot be operated;
f. when the lower three-station disconnecting switch (10) is operated, the breaker (11) is firstly adjusted to a brake separating position, the lower shifting fork plate moves left and right, the lower aligning hole is aligned with the lower isolating operating mechanism operating hole, then the lower isolating operating mechanism operating hole is inserted through the manual operating handle, the lower shifting fork plate slides left and right at the moment, the interlocking rod is pressed upwards through the lower switching mechanism, the interlocking rod moves upwards and then props against the back of the button switch plate, and therefore the breaker button switch cannot be pressed down, and the breaker operating mechanism cannot be operated.
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| CN202111305597.7A CN113990705B (en) | 2021-11-05 | 2021-11-05 | Environment-friendly gas insulated switchgear and use method thereof |
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| CN202111305597.7A CN113990705B (en) | 2021-11-05 | 2021-11-05 | Environment-friendly gas insulated switchgear and use method thereof |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204441174U (en) * | 2015-03-27 | 2015-07-01 | 湖北网安科技有限公司 | A kind of Three-Position Switch Operate Institutions |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2772184B1 (en) * | 1997-12-08 | 2000-01-28 | Gec Alsthom T & D Sa | CONTROL OF INTERROLLING OF A CIRCUIT BREAKER AND A DISCONNECTOR |
| CN201402916Y (en) * | 2009-05-01 | 2010-02-10 | 山东泰开成套电器有限公司 | Armored type fixed switch cabinet |
| CN203859011U (en) * | 2014-05-19 | 2014-10-01 | 苏州科陆东自电气有限公司 | Vacuum circuit breaker employing dual-disconnector interlocking structure |
| CN106548885B (en) * | 2016-10-26 | 2019-03-26 | 南方电网科学研究院有限责任公司 | A kind of disconnecting switch for nitrogen switchgear and earthing switch instruction device |
| TWI661455B (en) * | 2018-06-04 | 2019-06-01 | 精工電機股份有限公司 | Electric main switch lock |
| CN108832522B (en) * | 2018-07-10 | 2019-09-03 | 成都中工电气工程有限公司 | Contact net online switchboard assembly |
| CN111768992A (en) * | 2020-05-28 | 2020-10-13 | 宁波舜利高压开关科技有限公司 | Combination switch circuit breaker and mechanical interlocking device between three stations thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN204441174U (en) * | 2015-03-27 | 2015-07-01 | 湖北网安科技有限公司 | A kind of Three-Position Switch Operate Institutions |
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