CN109841434B - Electrical cabinet door operation interlock device - Google Patents

Abstract

The invention relates to an operation interlocking device for an electrical cabinet door. The operation interlocking device for an electrical cabinet door comprises a circuit breaker frame. The circuit breaker frame is provided with a rotating shaft extending in the up-down direction and a limiter that can move left and right. The movable stroke of the limiter There is a locking position for restricting the up and down movement of the rocking hole blocking plate of the rocking hole on the circuit breaker frame and an unlocking position for releasing the rocking hole blocking plate of the rocking hole on the circuit breaker frame from moving up and down; The anti-rotation is matched with an interlocking piece, and the interlocking piece has a pressure-bearing part that rotates with the rotating shaft under pressure when the cabinet door is closed to make the limiting piece move from the locking position to the unlocking position. The circuit breaker frame is also provided with a limiter. The position piece provides the elastic return piece of the force. It avoids that the circuit breaker room of the switchgear is electrified when the cabinet door is open, and the main busbars are connected to form a high-voltage circuit, which can accidentally enter the electrified interval; the five-proof interlock function is improved, the product performance of the medium-voltage switchgear is improved, and the medium-voltage switchgear is guaranteed. The reliability and safety of cabinet operation and use.

Description

Electrical cabinet door operation interlock device

technical field

The invention relates to an operation interlocking device for an electrical cabinet door.

Background technique

According to the five-proof requirements for medium voltage switchgear to prevent accidental entry of live compartments, 35kV medium voltage switchgear needs to control the interlocking control of the removable parts of the cabinet and the live compartment during operation. There is a danger of entering the live compartment by mistake: rocking in the circuit breaker when the switchgear door is not closed, opening the circuit breaker compartment door when the circuit breaker of the switchgear is in the working position. In the current medium and high voltage switchgear, an interlocking device is usually installed to realize the interlocking between the grounding switch and the circuit breaker. In order to meet the five-proof requirements of the switchgear, it is still necessary to provide an Locked interlock to ensure worker safety. The existing interlocking devices for realizing interlocking between the cabinet door and the circuit breaker are all provided with rocking holes on the frame of the circuit breaker, the rocking holes are provided with rocking hole blocking pieces, and the rocking hole blocking pieces are provided with reset holes. Spring, the roll-in hole cover shields the roll-in hole to ensure the safety of the staff. When the circuit breaker needs to be rolled from the test position to the working position; but in the case that the cabinet door is not closed, the roll-in hole cover can still be pulled. Open to rock in the circuit breaker and still pose a hazard to workers.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an electrical cabinet door operation interlocking device to solve the problem that the existing interlocking device for realizing the interlocking between the cabinet door and the circuit breaker still causes danger to the staff.

In order to achieve the above purpose, the first technical solution of the electrical cabinet door operation interlocking device of the present invention is: the electrical cabinet door operating interlocking device includes a circuit breaker frame and a rocking hole provided on the circuit breaker frame, and the rocking hole is provided on the circuit breaker frame. There is a rocking-in hole blocking plate on it, and the circuit breaker frame is also provided with a rotating shaft extending in the up-down direction and a limiter that can move left and right, and the rotating shaft is equipped with a stopper that can move the limiter left and right. A moving piece, the limit piece has a locking position on the movable stroke for restricting the up and down movement of the roll-in hole cover of the roll-in hole on the circuit breaker frame, and a locking position for releasing the limit piece to limit the roll-in hole cover piece. An interlocking piece for cooperating with the cabinet door is also fitted with an interlocking piece on the rotating shaft. For the pressed part that moves to the unlocking position, the circuit breaker frame is further provided with an elastic restoring member that provides the limiting member with a force to move from the unlocking position to the locking position.

The second technical solution of the electrical cabinet door operation interlocking device of the present invention is: on the basis of the first technical solution of the electrical cabinet door operating interlocking device of the present invention, the limiting member is provided with a socket, and the The stop includes a plug portion that mates with the socket. The stopper drives the stopper to move left and right through the cooperation of the plug and the socket, and has a simple structure and is easy to operate.

The third technical solution of the electrical cabinet door operation interlocking device of the present invention is: on the basis of the second technical solution of the electrical cabinet door operating interlocking device of the present invention, the part of the stopper and the rotation-stop matching part of the rotating shaft is stopped. Turn the square hole. The square hole has a simple structure and is easy to process.

The fourth technical solution of the electrical cabinet door operation interlocking device of the present invention is: on the basis of any one of the first to third technical solutions of the electrical cabinet door operating interlocking device of the present invention, the elastic reset member is A torsion spring sleeved on the shaft. The elastic reset piece is directly arranged on the rotating shaft, which is easy to control.

The fifth technical solution of the electrical cabinet door operation interlocking device of the present invention is: on the basis of any one of the first to third technical solutions of the electrical cabinet door operating interlocking device of the present invention, the interlocking element includes: A striker rod and a roller rotatably matched with the striker rod, and the outer peripheral surface of the roller constitutes a pressed part. The outer peripheral surface of the roller is a pressure-bearing part in contact with the cabinet door, which reduces the friction on the cabinet door when the cabinet door is closed, and facilitates the closing of the cabinet door.

The sixth technical solution of the electrical cabinet door operation interlocking device of the present invention is: on the basis of the fifth technical solution of the electrical cabinet door operating interlocking device of the present invention, one end of the striker away from the roller is provided with striker bars in four directions The striker rod is matched with the rotating shaft to prevent rotation through the square hole of the striker rod.

The seventh technical solution of the electrical cabinet door operation interlocking device of the present invention is: on the basis of any one of the first to third technical solutions of the electrical cabinet door operating interlocking device of the present invention, the limiting member is The part used to limit the stopper of the rocking hole is provided with a flange facing the circuit breaker frame. The flanging increases the contact area between the limit piece and the rocking hole blocking piece, and improves the stability of the limiting piece on the rocking hole blocking piece.

The eighth technical solution of the electrical cabinet door operation interlocking device of the present invention is: on the basis of any one of the first to third technical solutions of the electrical cabinet door operating interlocking device of the present invention, the rotating shaft is provided with a limiter. A position groove is installed in the position limit groove, and a limit ring for upper and lower position limit of the stopper is installed in the position limit groove. Preventing the stopper from sliding on the rotating shaft is not conducive to the left and right displacement and movement of the stopper to the limiter.

The ninth technical solution of the electrical cabinet door operation interlocking device of the present invention is: on the basis of any one of the first to third technical solutions of the electrical cabinet door operating interlocking device of the present invention, the circuit breaker frame is mounted on the circuit breaker frame. There is an interlocking base, the rotating shaft is arranged on the interlocking base, the limiting member is guided and slidably assembled on the interlocking base, and the interlocking base is provided with a limiter that restricts the leftward movement of the limiting member. bit slot. The limit slot prevents the limiter from moving to the left in transition.

The tenth technical solution of the electrical cabinet door operation interlocking device of the present invention is: on the basis of the ninth technical solution of the electrical cabinet door operating interlocking device of the present invention, the limiting member is provided with a jack, and the The stopper includes a plug part matched with the socket, and the limit groove limits the plug part to limit the leftward movement of the limiter.

The beneficial effect of the invention is that: the limiter for limiting the position of the rocking-in hole blocking plate is arranged on the frame of the circuit breaker, and the torsion spring resets itself, and only when the cabinet door of the switch cabinet is closed, the cabinet door squeezes the interlocking member , the interlocking member overcomes the action of the torsion spring through the rotating shaft, so that the limiter releases the restriction on the rocking hole blocking plate, so that the rocking hole blocking plate can be pulled open, insert the rocking handle into the rocking hole to rock the circuit breaker from the test position When the cabinet door is open, the circuit breaker room of the switchgear is not charged, and the main busbar is connected to form a high-voltage circuit, which may enter the live interval by mistake; the five-proof interlocking function has been improved, and the product performance of the medium-voltage switchgear has been improved to ensure It improves the reliability and safety of the operation and use of the medium voltage switchgear.

Description of drawings

1 is a schematic structural diagram of the circuit breaker of the electrical cabinet door operation interlocking device of the present invention in a test position;

2 is a schematic structural diagram of the circuit breaker of the electrical cabinet door operation interlocking device of the present invention in the working position;

3 is a schematic structural diagram of the electrical cabinet door operation interlocking device of the present invention after removing the circuit breaker room cabinet door;

Fig. 4 is the structural schematic diagram of the limiting member extending when the cabinet door of the electrical cabinet door operation interlocking device of the present invention is in an open state;

Fig. 5 is the schematic diagram when the door of the cabinet in Fig. 4 is in the open state when the rocking-in hole blocking plate is in the locked state;

6 is a schematic structural diagram of the limiting member being pulled back when the cabinet door of the electrical cabinet door operation interlocking device of the present invention is in a closed state;

Fig. 7 is the schematic diagram when the cabinet door in Fig. 6 is in the closed state when the rocking-in hole blocking plate is in the unlocked state;

8 is a schematic structural diagram of the cooperation between the rocking-in hole blocking piece of the electrical cabinet door operation interlocking device of the present invention and the interlocking device;

Figure 9 is a rear view of the interlock device in Figure 8;

Figure 10 is an axonometric view of the interlocking device in Figure 8;

FIG. 11 is a schematic structural diagram of the limiting member of the interlocking device in FIG. 8;

Fig. 12 is the structural schematic diagram of the stopper of the interlocking device in Fig. 8;

Fig. 13 is the structural representation of the rotating shaft of the interlocking device in Fig. 8;

FIG. 14 is a schematic structural diagram of the striker of the interlocking device in FIG. 8 .

Detailed ways

The embodiments of the present invention will be further described below with reference to the accompanying drawings.

A specific embodiment of the electrical cabinet door operation interlocking device of the present invention, as shown in FIG. 1 and FIG. 2 , the electrical cabinet door operating interlocking device includes a cabinet body 1 , a cabinet door 2 and a circuit breaker 3 located in the circuit breaker room of the switch cabinet . In this embodiment, unless otherwise specified, the cabinet door 2 refers to the door of the circuit breaker room, and the cabinet door 2 is located on the front side of the circuit breaker room. As shown in FIG. 3, the circuit breaker 3 includes a circuit breaker frame 5, and an interlocking device 4 is arranged on the circuit breaker frame 5. When the circuit breaker 3 is in the test position, as shown in FIG. 1, the circuit breaker 3 does not form a conduction circuit, The circuit breaker room is not electrified; when the circuit breaker 3 is in the working position, as shown in Figure 2, the circuit breaker 3 forms a conducting circuit, and the circuit breaker room is in a high-voltage electrified state, and there is a danger of entering the electrified interval by mistake.

In this embodiment, as shown in FIG. 3 to FIG. 7 , the circuit breaker 3 is provided with a circuit breaker frame 5 on the front side of the circuit breaker room. The rocking hole 8 is converted from the test position to the working position. The rocking hole 8 is provided with a rocking hole blocking piece 6 for blocking the rocking hole 8, and a return spring is provided between the rocking hole blocking piece 6 and the rocking hole. , when it is necessary to insert the rocker into the rocker hole 8, pull down the rocker hole cover 6 to open the rocker hole 8 and insert the rocker to realize the switch of the circuit breaker 3 from the test position to the working position; when the circuit breaker 3 After rocking from the test position to the working position, pull out the rocking handle, and the rocking hole block 6 will re-block the rocking hole 8 under the action of the return spring. The rocking handle cannot be inserted, and the circuit breaker cannot be rocked. The hole blocking plate 6 can not only prevent dust from entering the circuit breaker room, but also play the role of preventing misoperation.

In this embodiment, the interlocking device 7 is provided with a limiting member 14 , and the movable stroke of the limiting member 14 has a locking position for limiting the up and down movement of the rocking hole blocking piece 6 of the rocking hole 8 on the circuit breaker frame 5 And the unlocking position used to release the rocking-in hole blocking piece 8 of the rocking-in hole 6 on the circuit breaker frame 3 to move up and down; Under the action of the spring, the limiting member 14 moves to the left to the locking position, which is located at the lower end of the rocking hole blocking piece 6, and the limiting member 14 limits the rocking hole blocking piece 6 when it is in the locking position. In order to lock the rocking hole blocking piece 6 on the rocking hole 8, the rocking hole blocking piece 6 cannot be pulled down, the rocking hole 8 is kept closed, and the rocking handle cannot be inserted into the rocking hole 8, so that the circuit breaker 3 cannot be pulled from the rocking hole 8. The test position is converted to the working position to ensure the safety of the staff.

In this embodiment, as shown in FIG. 6 and FIG. 7 , when the cabinet door 2 is in the closed state, the cabinet door 2 squeezes the striker bar 12 , so that the striker bar 12 drives the rotation shaft 10 which is anti-rotation matched with the striker bar 12 to rotate, and the rotation shaft 10 Then drive the limiter 14 to move to the unlocking position to the right, and the limiter 14 releases the limit on the rocking hole cover 6 so that the rocking hole cover 6 is in an unlocked state. At this time, the rocking hole cover 6 It can be pulled down to open the rocking hole, and the rocking handle can be inserted into the rocking hole 8 to rock the circuit breaker 3 from the test position to the working position. The circuit breaker can only be rocked in when the cabinet door 2 is closed, which improves the function of preventing accidental entry of live power in the five-proof interlock, and prevents the circuit breaker from rocking into the working position when the switchgear circuit breaker door is in the open state. In the high-voltage circuit, the staff mistakenly entered the live circuit breaker room.

In this embodiment, as shown in FIG. 8 to FIG. 14 , the interlocking device 7 includes an interlocking base 9 , and the interlocking base 9 is provided with a mounting hole 91 for fixing it on the circuit breaker frame 5 and for limiting The limit slot 92 for the limiter 14 to move to the left excessively, in other embodiments, the limit slot 92 may not be provided on the interlock base 9, and a limit slot 92 is provided between the interlock device and the rocking hole blocking plate for The gear lever that limits the position of the limiting member to the left; the interlocking base 9 is provided with a rotating shaft 10 in the up and down direction, and the rotating shaft 10 is provided with a first square table 101 and a second square table 103, the first square table 103. There is an annular limit groove 102 below the stopper 13; the stopper 13 is provided with a first square hole 131, the first square hole 131 is engaged with the first square table 101 on the rotating shaft 10 to prevent rotation, and the stopper 13 is far away from One end of the first square hole 131 is inserted into the insertion hole 141 of the stopper 14 so that the stopper 14 can move left and right along with the swing of the stopper 13 . 142 limits the position of the rocking hole blocking piece 6, so that the contact surface between the flange 142 and the rocking hole blocking piece 6 is increased, and the stability of limiting the rocking hole blocking piece 6 is improved; the annular limit groove of the rotating shaft 10 102 is provided with a limit ring 16, the limit ring 16 is used to prevent the stopper 13 from sliding down on the rotating shaft 10, and to ensure the stability of the stopper 13 swinging; in this embodiment, the rotating shaft 10 is also provided with a torsion spring 15, The torsion spring 15 is used to reset the rotating shaft 10 when the cabinet door 2 is opened, so as to move the limiting member to the left below the rocking hole blocking piece 6 to limit the rocking hole blocking piece 6 .

In this embodiment, the ram 12 is provided with a second square hole 121 , the second square hole 121 is engaged with the second square table 103 of the rotating shaft 10 to prevent rotation, and the end of the ram 12 away from the second square hole 121 There is a roller mounting hole 122, the roller 11 is installed on the roller mounting hole 122, and the roller 11 is rotated and assembled on the striker 12 through the roller mounting hole 122. When the colliding rod 12 is squeezed, the friction of the cabinet door 2 is damaged, and at the same time, the cabinet door 2 can be closed with less effort. The roller 11 and the colliding rod 12 constitute an interlock.

During operation, when the cabinet door 2 is in the open state, the torsion spring 15 is in a free state, the stopper 13 is engaged with the first square platform 101 of the rotating shaft 10 through the first square hole 131 to prevent rotation, and relies on the limit ring 16 Position the stopper 13 in the axial direction of the rotating shaft 10. At this time, there is no external force on the stopper 13 to overcome the force of the torsion spring 15, so the stopper 13 cannot drive the stopper 14 to move to the right. The limit of the rocking-in hole blocking piece 6 by the limiting member 14 cannot be released, the rocking-in hole blocking piece 6 cannot be pulled down, the rocker handle of the circuit breaker 3 cannot be inserted into the rocking-in hole 8, and the circuit breaker cannot be moved from the test position to the working position. Convert the displacement, so that the circuit breaker cannot be charged; when the cabinet door 2 is in the closed state, the cabinet door 2 hits the roller 11 and squeezes the roller 11 during the closing process to drive the striker 12 to rotate counterclockwise, and the striker 12 passes through the second square The hole 121 is engaged with the second square table 103 of the rotating shaft 10 to prevent rotation, and a nut can be installed on the top of the second square table 103 to limit the position of the collider 12 in the axial direction of the rotating shaft 10, so that the rotating shaft 10 rotates counterclockwise, The stopper 13 also rotates along with it, and the stopper 13 pushes the stopper 14 to move to the right, so that the limit of the stopper 14 to the rocking hole cover 6 is released, and the rocking hole cover on the circuit breaker is released. 6, it can be pressed to open smoothly, and the circuit breaker can be rocked from the test position to the working position.

In this embodiment, the rotating shaft is firstly engaged with the stopper to prevent rotation, and then the stopper is inserted into the insertion hole of the stopper to drive the stopper to move left and right. In other embodiments, the stopper may be Gear, the limiter is a rack, the stopper and the limiter are meshed with the gears to realize the left and right movement of the limiter, and the side of the rack away from the stopper is provided with a limit groove to limit the excessive leftward movement of the rack The movable protrusion; in this embodiment, the stopper and the rotating shaft are matched with the square table to prevent rotation through the square hole. In other embodiments, the stopper and the rotating shaft are provided with key grooves, and the stopper and the rotating shaft pass through the key Anti-rotation fit; in other embodiments, rollers may not be provided on the striker rod, and the end of the striker rod away from the rotating shaft is the part under pressure; in other embodiments, the limiter may not be provided with flanges; in other embodiments It is also possible not to provide a limit groove, and to limit the position of the stopper in the vertical direction by the torsion spring.

Claims (5)

1. The electrical cabinet door operation interlocking device includes a circuit breaker frame and a rocking hole provided on the circuit breaker frame, and the rocking hole is provided with a rocking hole stopper, characterized in that: the circuit breaker frame is provided with a rocking hole stopper. There is also a rotating shaft extending in the up-down direction and a limiter that can move left and right, the rotating shaft is equipped with a stopper that can move the limiter left and right, and the movable stroke of the limiter has a limiter for The locking position for restricting the up and down movement of the rocking hole blocking plate of the rocking hole on the circuit breaker frame and the unlocking position for releasing the limiter to limit the rocking hole blocking plate; An interlocking piece matched with the cabinet door, the interlocking piece has a pressure-bearing part that rotates with the rotating shaft under pressure when the cabinet door is closed, so as to make the limiting piece move from the locking position to the unlocking position, and the circuit breaker frame is mounted on the circuit breaker frame. There is also an elastic reset piece that provides the limit piece with a force to move from the unlocked position to the locked position, the limit piece is provided with a socket, and the stop piece includes a plug part matched with the socket. , the elastic reset member is a torsion spring sleeved on the rotating shaft, the interlocking member includes a striker rod and a roller that is rotatably matched with the striker rod, the outer peripheral surface of the roller constitutes a pressurized part, and the interlocking device includes an interlocking The locking base is provided with a rotating shaft running through the interlocking base in the up and down direction, the rotating shaft is provided with a first square table and a second square table, the stopper is provided with a first square hole, and the first square hole is connected with the first square hole. The first square table on the rotating shaft is matched with the rotation stopper, and the end of the stopper away from the first square hole is inserted into the insertion hole of the stopper so that the stopper can move left and right with the swing of the stopper. The torsion spring is used for When the cabinet door is opened, the rotating shaft is reset to move the limiter to the left under the rocking hole blocking plate to limit the rocking hole blocking plate. The striker is provided with a second square hole, a second square hole. It is matched with the second square platform of the rotating shaft to prevent rotation. 2 . The operation interlocking device for an electrical cabinet door according to claim 1 , wherein the portion of the limiting member for limiting the position of the rocking hole blocking plate is provided with a flange facing the circuit breaker frame. 3 . 3 . The electrical cabinet door operation interlocking device according to claim 1 , wherein a limit groove is arranged on the rotating shaft, and a limiter for upper and lower limit of the stopper is installed in the limit groove. 4 . bit circle. 4 . The operation interlocking device for an electrical cabinet door according to claim 1 , wherein the interlocking base is provided with a limiting slot for limiting the leftward movement of the limiting member. 5 . 5 . The operation interlocking device for an electrical cabinet door according to claim 4 , wherein the limiting grooves limit the position of the plug portion to limit the leftward movement of the limiting member. 6 .

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