CN113013771B

CN113013771B - Interlocking mechanism of switch equipment

Info

Publication number: CN113013771B
Application number: CN202110245992.4A
Authority: CN
Inventors: 何华强; 张松清; 张珊
Original assignee: Sichuan Qinba Electric Co ltd
Current assignee: Sichuan Qinba Electric Co ltd
Priority date: 2021-03-05
Filing date: 2021-03-05
Publication date: 2023-02-21
Anticipated expiration: 2041-03-05
Also published as: CN113013771A

Abstract

The invention discloses an interlocking mechanism of switch equipment, which comprises a rotating shaft, a grounding switch part and an interlocking plate, wherein the rotating shaft drives the grounding switch part to switch between a grounding closed position and a grounding separated position through a crank connecting rod component, the interlocking plate moves up and down between an upper position and a lower position, the interlocking plate is provided with a baffle, the baffle blocks the front end part of the rotating shaft when the interlocking plate is in the upper position, the front end part of the rotating shaft is exposed when the interlocking plate is in the lower position, the interlocking plate is also provided with a handcart interlocking part, the handcart interlocking part is matched with a limiting part arranged on a circuit breaker handcart, the handcart interlocking part blocks the limiting part to prevent the circuit breaker handcart from moving from a test position to a working position when the interlocking plate is in the lower position, and the limiting part blocks the handcart interlocking part to prevent the interlocking plate from moving to the lower position when the circuit breaker handcart is in the working position. The invention has the advantages of compact structure, small occupied space, few parts, convenient implementation, low cost, high interlocking reliability, high use safety and capability of meeting the requirement of five-prevention interlocking.

Description

Interlocking mechanism of switch equipment

Technical Field

The invention relates to the technical field of switch equipment, in particular to an interlocking mechanism of switch equipment.

Background

The main function of the switch gear is to open and close, control and protect electric equipment in the process of power generation, power transmission, power distribution and electric energy conversion of an electric power system. The components in the switch cabinet mainly comprise a circuit breaker, an isolating switch, a load switch, an operating mechanism, a mutual inductor, various protection devices and the like. High tension switchgear needs to satisfy the requirement of five preventions usually, and first, the vacuum circuit breaker dolly in the high tension switchgear is after the experimental position combined floodgate, and the dolly circuit breaker can't get into operating position. (prevention of on-load switching-on); and secondly, when the grounding knife in the high-voltage switch cabinet is in a closed position, the trolley circuit breaker cannot be switched on. (prevention of closing with earth connection); and thirdly, when a vacuum circuit breaker in the high-voltage switch cabinet is switched on, the rear door of the disk cabinet is locked with the cabinet door through a mechanism on the grounding knife. (prevent erroneous entry into the charging interval); fourthly, a vacuum circuit breaker in the high-voltage switch cabinet is switched on during working, and the grounding switch can not be put into use. (prevention of live-wire hanging of ground wires); and fifthly, the vacuum circuit breaker in the high-voltage switch cabinet cannot exit from the working position of the trolley circuit breaker when the vacuum circuit breaker works and operates in a closing mode. (preventing pulling of the knife switch with load). In order to meet the requirement of five-prevention, the switch equipment is usually provided with an interlocking mechanism to prevent misoperation, but the existing interlocking mechanism of the switch equipment is complex in structure, large in occupied space, easy to interfere and low in operation reliability.

Disclosure of Invention

The technical problem to be solved and the technical task provided by the invention are to improve the prior art, provide an interlocking mechanism of a switch device, and solve the problems that the interlocking mechanism of the switch device in the prior art is complex in structure, large in occupied space, easy to interfere and low in operation reliability.

In order to solve the technical problems, the technical scheme of the invention is as follows:

the utility model provides a switchgear's interlocking device, includes pivot, earthing switch spare and interlocking board, the pivot rotate to set up and drive the earthing switch spare through crank link assembly and close the position with closing the position with ground connection and switch between the position, interlocking board go up and down the activity between host and the next, interlocking board be provided with the baffle, interlocking board when being in host the baffle blocks the preceding tip of pivot, interlocking board is in when the next the preceding tip of pivot exposes, interlocking board still is provided with handcart interlock, handcart interlock cooperatees with the spacing portion that sets up on the circuit breaker handcart, interlocking board when being in the next handcart interlock blocks spacing portion and removes from test position to the operating position in order to prevent that the circuit breaker handcart from the test position, the circuit breaker handcart be in the operating position when spacing portion blocks handcart interlock portion and removes from host to the next in order to prevent interlocking board.

Furthermore, be provided with first cam in the pivot, set up first flange in first cam position department on the interlock board, the interlock board be in on the position and when ground connection switch spare was in ground connection and divides the position first flange support and lean on the stub axle of first cam and prevent that the pivot from rotating, the interlock board be in the lower and when ground connection switch spare was in ground connection and closes the position the stub axle department of first cam support and lean on first flange in order to prevent that the interlock board from switching to the superordinate.

Further, still include the locking lever that sets up on the cabinet door, the locking lever be L shape, be provided with the second cam in the pivot, ground switch spare is in ground connection branch position and when the cabinet door is the closed condition, the long footpath department of second cam is spacing to live L shape locking lever in order to prevent that the cabinet door from opening, ground switch spare is in ground connection and closes when the position, the second cam is along with the pivot rotates to second cam long footpath department and avoids L shape locking lever.

Further, still include the latched device who sets up on switchgear, still be provided with the bolt with latched device matched with on the linkage board, when linkage board is in the superposition the bolt inserts latched device and reaches the locking state.

Further, latched device include the hasp casing, set up on the hasp casing and supply the bolt male jack passageway, the lateral wall trompil of jack passageway, elasticity locking round pin inserts in the jack passageway from trompil vertically elasticity, set up the pinhole that matches with elasticity locking round pin on the bolt, elasticity locking round pin on be provided with and be used for pulling elasticity locking round pin to withdraw from the unlocking part of trompil.

Furthermore, the bottom of the jack channel is also provided with a boosting block, and the boosting block is connected with a boosting spring so as to enable the plug pin to exit from the jack channel.

Furthermore, a crank is additionally arranged when the front end part of the rotating shaft is exposed.

Compared with the prior art, the invention has the advantages that:

the interlocking mechanism of the switch device has the advantages of compact structure, small occupied space, few parts, convenient implementation, low cost, strong integrated function and high interlocking reliability, fully meets the five-prevention interlocking requirement, has high use safety, ensures the stable and normal work of the switch device, and avoids safety accidents of workers during equipment maintenance.

Drawings

Fig. 1 is a schematic structural view of an interlocking mechanism of a switchgear in a ground connection position;

fig. 2 is a schematic structural view of an interlocking mechanism of the switching apparatus in a grounding dislocation state;

fig. 3 is a schematic structural diagram of the latch mechanism.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The interlocking mechanism of the switch equipment disclosed by the embodiment of the invention has the advantages of simple and compact structure, small occupied space, convenience in operation, high interlocking reliability and reliability in realizing five-prevention.

As shown in fig. 1-3, a switchgear's interlocking device mainly includes pivot 1, earthing switch spare 2 and interlocking board 3, pivot 1 rotate to set up and drive earthing switch spare 2 through crank link assembly 4 and close the position with earthing and switch between the branch position with earthing, interlocking board 3 go up and down the activity between the superposition and the next, interlocking board 3 be provided with baffle 31, interlocking board 3 be in when superposition baffle 31 blocks the front end of pivot 1, interlocking board 3 is in when next the front end of pivot 1 exposes, and crank 5 when exposing, conveniently operates pivot 1 and rotates, and then realizes the operation of earthing deciliter, interlocking board 3 still is provided with handcart interlocking portion 32, handcart interlocking portion 32 cooperatees with the spacing portion 6 that sets up on the circuit breaker handcart, interlocking board 3 when next handcart interlocking portion 32 block spacing portion 6 and prevent that the circuit breaker from moving from the operating position to the handcart interlocking portion 32 when the next is in the next.

The interlocking mechanism of the switch device described in this embodiment drives the movement of the grounding switch 2 by using the rotation of the rotating shaft 1, so as to realize the grounding on-position and the grounding off-position, and the rotation of the operating rotating shaft 1 needs to expose the front end of the rotating shaft 1, that is, the interlocking plate 3 must be in the lower position, and the handcart interlocking part 32 on the interlocking plate 3 blocks the limiting part 6 when the interlocking plate 3 is in the lower position to prevent the circuit breaker handcart from moving from the test position to the working position, that is, the interlocking plate 3 prevents the circuit breaker from being switched on by mistake when in the lower position, and only when the interlocking plate 3 is in the upper position, the circuit breaker handcart can be operated to move from the test position to the working position; similarly, only when the circuit breaker handcart retreats back to the experimental position from the operating position, namely when the circuit breaker is in the separating brake state, just can move linkage plate 3 from the upper position to the lower position, and then just can expose the front end of pivot 1, just can operate the pivot so that grounding switch spare 2 divides the position to switch to ground connection from ground connection and closes the position, also prevent effectively that the ground connection operation is carried out under the combined floodgate state promptly, thereby effectively prevent to take the ground connection to close the circuit breaker, improve the safety in utilization, satisfy the demand of "five preventions".

In this embodiment, the rotating shaft 1 is provided with the first cam 11, the position of the first cam 11 on the interlocking plate 3 is provided with the first rib 33, the first rib 33 abuts against the short diameter of the first cam 11 to prevent the rotating shaft 1 from rotating when the interlocking plate 3 is at the upper position and the grounding switch 2 is at the grounding split position, and the long diameter of the first cam 11 abuts against the first rib 33 to prevent the interlocking plate 3 from being switched to the upper position when the interlocking plate 3 is at the lower position and the grounding switch 2 is at the grounding split position. The first cam 11 and the first blocking edge 33 are utilized to perform mutual limiting, the first blocking edge 33 is positioned under the rotating shaft 1, the first cam 11 is provided with a short diameter part and a long diameter part which are far away from the axis of the rotating shaft 1, when the interlocking plate 3 is positioned at an upper position and the grounding switch part 2 is positioned at a grounding split position, the short diameter part of the first cam 11 faces to the lower position, and the first blocking edge 33 is abutted against the short diameter part of the first cam 11, so that the rotating shaft 1 is effectively prevented from rotating, namely, the grounding on-off operation is prevented from being performed when the circuit breaker is in a closing state; on the other hand, when the interlock plate 3 is in the lower position and the grounding switch 2 is in the grounding closed position, the long diameter part of the first cam 11 faces to the right lower side, and the long diameter part of the first cam 11 abuts against the first rib 33, so that the interlock plate 3 is effectively prevented from moving upwards, and the opening and closing operation of the circuit breaker is further prevented from being performed in the grounding closed position state.

This embodiment switchgear's interlocking device still set up locking lever 71 on cabinet door 7, locking lever 71 be L shape, be provided with second cam 12 in the pivot 1, earthing switch spare 2 is in the ground connection and divides the position and when cabinet door 7 is the closed condition, the long footpath department of second cam 12 is spacing to stop L shape locking lever 71 in order to prevent that cabinet door 7 from opening, earthing switch spare 2 is when the ground connection closes the position, second cam 12 avoids L shape locking lever 71 along with pivot 1 rotation to second cam 12 long footpath department. That is to say, only can open the cabinet door when earthing switch spare 2 is in the ground connection and closes under the position state to ensure that switchgear is in ground connection state when needing to maintain the switchgear inner part, ensure the security of maintaining operation, avoid appearing the dangerous situation of mistake electric shock.

Switchgear's interlocking device still be provided with latch mechanism 8 on switchgear, still be provided with on interlocking board 3 with latch mechanism 8 matched with bolt 34, when interlocking board 3 is in the superordinate the bolt 34 inserts latch mechanism 8 and reaches the locking state, further provides the guarantee, avoids the mistake to bump interlocking board 3 and makes it switch from superordinate to next, improves the safety in utilization.

Latching mechanism 8 include hasp casing 81, set up on the hasp casing 81 and supply bolt 34 male jack passageway 82, the lateral wall trompil of jack passageway 82, elasticity locking round pin 83 is from trompil vertically elasticity insert in the jack passageway, bolt 34 is last to be set up the pinhole that matches with elasticity locking round pin 83, elasticity locking round pin 83 on be provided with and be used for pulling elasticity locking round pin 83 to withdraw from the unblock portion 84 of trompil. The interlocking plate 3 can be locked in the upper position by the matching of the bolt 34 and the locking mechanism 8, and when the interlocking plate 3 is switched from the upper position to the lower position, the unlocking part 84 is operated to unlock the interlocking plate, so that the interlocking plate 3 can move downwards, and misoperation is avoided. And, the bottom of the said jack channel also sets up and helps the pushing block 85, help the pushing block 85 connect and help the spring so as to make the bolt 34 withdraw from the jack channel 82, utilize and help and guarantee the reliable withdrawal from the jack channel of the bolt, avoid the situation of the jamming, improve the smooth and easy reliability of the state transition of the interlocking board 3.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.

Claims

1. The utility model provides a switchgear's interlocking device, its characterized in that, includes pivot (1), earthing switch spare (2) and interlocking board (3), pivot (1) rotate to set up and drive earthing switch spare (2) through crank link assembly (4) and close the position with earthing and switch over between the position with earthing branch along rectilinear motion, interlocking board (3) go up and down the activity between upper position and lower position, interlocking board (3) be provided with baffle (31), interlocking board (3) when being in the upper position baffle (31) block the preceding tip of pivot (1), interlocking board (3) are when being in the lower position the preceding tip of pivot (1) exposes, interlocking board (3) still are provided with handcart interlocking portion (32), handcart interlocking portion (32) cooperate with spacing portion (6) that set up on the circuit breaker handcart, interlocking board (3) when being in the lower position handcart interlocking portion (32) block spacing portion (6) and prevent circuit breaker from the work position to the circuit breaker upper position move handcart interlocking portion (6) and still be provided with interlocking board (3) from the upper position of test, handcart interlocking portion (32) still include interlocking board (3) and interlock mechanism (8), when linkage plate (3) is in the superposition bolt (34) insert latch mechanism (8) and reach the locking state, latch mechanism (8) including hasp casing (81), set up on hasp casing (81) and supply bolt (34) male jack passageway (82), the lateral wall trompil of jack passageway (82), elasticity locking round pin (83) are followed trompil department vertically elasticity and are inserted in the jack passageway, set up the pinhole that matches with elasticity locking round pin (83) on bolt (34), elasticity locking round pin (83) on be provided with and be used for pulling elasticity locking round pin (83) to withdraw from unblock portion (84) of trompil.

2. The interlocking mechanism of a switch device according to claim 1, wherein the rotating shaft (1) is provided with a first cam (11), the interlocking plate (3) is provided with a first rib (33) at the position of the first cam (11), the first rib (33) abuts against the short diameter of the first cam (11) to prevent the rotating shaft (1) from rotating when the interlocking plate (3) is at the upper position and the earthing switch member (2) is at the earthing separated position, and the long diameter of the first cam (11) abuts against the first rib (33) to prevent the interlocking plate (3) from being switched to the upper position when the interlocking plate (3) is at the lower position and the earthing switch member (2) is at the earthing combined position.

3. The interlocking mechanism of switching equipment according to claim 1, further comprising a lock rod (71) disposed on the cabinet door (7), wherein the lock rod (71) is L-shaped, a second cam (12) is disposed on the rotating shaft (1), when the grounding switch member (2) is in a grounding position and the cabinet door (7) is in a closed state, the L-shaped lock rod (71) is limited at the long diameter of the second cam (12) to prevent the cabinet door (7) from being opened, and when the grounding switch member (2) is in a grounding position, the second cam (12) rotates along with the rotating shaft (1) to the long diameter of the second cam (12) to avoid the L-shaped lock rod (71).

4. The interlock mechanism of claim 1 wherein a boost block (85) is further provided at the bottom of the jack channel, the boost block (85) being connected to a boost spring to urge the latch (34) out of the jack channel (82).

5. The interlocking mechanism of a switching device according to claim 1, wherein a crank handle (5) is additionally installed when the front end portion of the rotary shaft (1) is exposed.