CN211376514U

CN211376514U - Safety interlocking device of switch cabinet back door

Info

Publication number: CN211376514U
Application number: CN201922218301.2U
Authority: CN
Inventors: 巫珏
Original assignee: Jiangsu Tiangang Cabinet Co ltd
Current assignee: Jiangsu Tiangang Cabinet Co ltd
Priority date: 2019-12-12
Filing date: 2019-12-12
Publication date: 2020-08-28
Anticipated expiration: 2029-12-12

Abstract

The utility model discloses a safety interlock of cubical switchboard back door, include: install the operating shaft in cubical switchboard, still include: install the first mounting bracket on the cubical switchboard, wear to be equipped with the locking lever on the first mounting bracket, it has the latch hook to articulate on the rear end of locking lever, the latch hook is located the rear of first mounting bracket, the place ahead of first mounting bracket is equipped with the carriage, the locking lever is fixed mutually with the carriage, still be equipped with the elasticity pressing means that enables carriage and first mounting bracket counterbalance and lean on first mounting bracket, the internally mounted of cubical switchboard has the second mounting bracket, wear to be equipped with the actuating lever on the second mounting bracket, one side of actuating lever is equipped with the interlocking lever, interlocking lever and actuating lever are fixed mutually, actuating lever and carriage are connected the transmission through the transfer line, be equipped with the lock post on the inside of back door, the breach has been seted up on the lock post lower part. The safety interlocking device can interlock the switch of the rear door of the switch cabinet and the on-off of the grounding switch, so that the safety of the switch cabinet is greatly improved.

Description

Safety interlocking device of switch cabinet back door

Technical Field

The utility model relates to a cubical switchboard, concretely relates to safety interlock of cubical switchboard back door.

Background

A switch cabinet is a common electrical device mainly including a circuit breaker, and is divided into a low-voltage switch cabinet and a high-voltage switch cabinet. At present, the requirements on the technical performance, operation, use, overhaul, maintenance and the like of the removable switch cabinet in an electric power system are higher and higher, and particularly the requirements on safety are higher and higher. When the switch cabinet is maintained and overhauled, in order to prevent the switch cabinet from being electrified and endangering personal safety, the operating shaft in the switch cabinet needs to be rotated firstly to switch on and earth the earthing switch in the switch cabinet, then the front lower door or the rear door of the switch cabinet can be opened for maintenance and overhaul, and in the process of opening the door for maintenance and overhaul, the rotating operating shaft is not allowed to disconnect the earthing switch from the brake and the earthing. But the back door and preceding lower door and earthing switch of current cubical switchboard are not interlocked, promptly: the on-off of the grounding switch, the opening and closing of the rear door and the opening and closing of the front lower door are mutually independent, so that the grounding switch is easy to be in non-closed grounding, a maintainer opens the front lower door or the rear door of the switch cabinet to maintain, or the grounding switch of the switch cabinet is disconnected and grounded by mistaken opening in the process of opening, maintenance and repair, and electric shock danger is easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: a safety interlock device for a rear door of a switch cabinet, which can interlock the opening and closing of the rear door of the switch cabinet and the grounding switch.

In order to solve the above problem, the utility model discloses the technical scheme who adopts does: safety interlock of cubical switchboard back door includes: install the operating axis in the cubical switchboard cabinet body, can drive earthing switch separating brake or combined floodgate in the cubical switchboard behind the positive, reversal operating axis, its characterized in that: further comprising: the switch cabinet comprises a first mounting frame arranged on a cabinet body at the rear door of the switch cabinet, a lock rod capable of moving back and forth is arranged on the first mounting frame in a penetrating way, a lock hook capable of swinging up and down is hinged at the rear end of the lock rod and is positioned behind the first mounting frame, a driving frame is arranged in front of the first mounting frame and is fixed with the lock rod, so that the lock rod can drive the driving frame to move back and forth together, an elastic pressing mechanism capable of elastically pressing the driving frame backwards to enable the driving frame to abut against the first mounting frame is also arranged on the first mounting frame, a second mounting frame is arranged inside the switch cabinet body, a driving rod capable of moving back and forth is arranged on the second mounting frame in a penetrating way, an interlocking rod is arranged on one side of the driving rod and is fixed with the driving rod, so that the driving rod can drive the interlocking rod to move back and forth together, and forth, so that the driving frame can drive the driving rod to move back and forth together, a lock column is arranged on the inner side of the rear door of the switch cabinet, the lower part of the lock post is provided with a gap, when the back door is closed, the lock post can overcome the elasticity of the elastic pressing mechanism to push the lock rod forwards under the driving of the back door, so that the lock rod can drive the lock hook and the driving frame to move forwards together, the lock hook can swing upwards through the abutting of the front lower part of the lock hook and the first mounting frame after moving forwards, so that the lock hook can be hooked in the gap at the lower part of the lock column, the driving frame can drive the driving rod to drive the interlocking rod to move forwards through the driving rod after moving forwards, a stop block positioned on one side of the interlocking rod is arranged on the side surface of the operating shaft, when the rear door is opened, the interlocking rod can stop the stop block to enable the operating shaft not to rotate towards the direction of opening the grounding switch, and therefore closing and grounding of the grounding switch are guaranteed when the rear door is opened; when the rear door is closed, the interlocking rod can move forwards under the driving of the driving rod, so that the interlocking rod does not block the stop block, and the operating shaft can rotate towards the direction of opening the grounding switch; when the operating shaft is rotated to enable the grounding switch to be disconnected from the ground, the stop block can move to the rear of the interlocking rod to stop the interlocking rod, so that the interlocking rod cannot move backwards, the elastic pressing mechanism cannot enable the locking hook to reset, and the locking hook can enable the back door to be incapable of being opened after the grounding switch is disconnected by hooking the locking column.

Further, the safety interlock of cubical switchboard back door wherein: the structure of the elastic pressing mechanism comprises: walk around towards the spring post of wearing to locate on first mounting bracket and the carriage, be provided with one on the rear end of spring post and block the boss, the cover is equipped with a reset spring on blocking the spring post between boss and the first mounting bracket, reset spring's both ends respectively with block boss and first mounting bracket counterbalance and lean on, make reset spring can push away the spring post backward, it has one to be located the carriage the place ahead and pushes away the nut with the carriage counterbalance on the spring post still threaded connection, the spring post presses the carriage backward through pushing away the nut.

Further, the safety interlock of cubical switchboard back door wherein: the front part of the first mounting frame is also provided with a guide plate, the guide plate is provided with two guide holes, the front end of the lock rod penetrates through one guide hole, the front end of the spring column penetrates through the other guide hole, and the two guide holes can respectively guide the lock rod and the spring column in the front and back directions.

Further, the safety interlock of cubical switchboard back door wherein: the fixing structure between the lock rod and the driving frame is as follows: the locking rod is provided with an installation step, the locking rod penetrates through the driving frame, the driving frame abuts against the installation step, the locking rod is further in threaded connection with a locking nut, and the locking nut can lock and press the driving frame between the driving frame and the installation step, so that the driving frame and the locking rod are fixed.

Further, the safety interlock of cubical switchboard back door wherein: an anti-jamming spring capable of helping the locking hook to reset is arranged between the locking hook and the rear end of the locking rod, and two ends of the anti-jamming spring are respectively abutted against the rear ends of the locking hook and the locking rod.

Further, the safety interlock of cubical switchboard back door wherein: the rear end face of the lock column is provided with a threaded hole, the rear door is provided with a mounting hole, the bolt penetrates through the mounting hole from the outer side of the rear door and is screwed into the threaded hole in the rear end of the lock column, the lock column can be mounted on the inner side of the rear door, the outer side of the rear door is further provided with an indicating cover covering the mounting hole, the indicating cover is lifted to expose the bolt, and then the bolt can be dismounted from the outer side of the rear door, so that the lock column is dismounted.

Further, the safety interlock of cubical switchboard back door wherein: the lower part is provided with one on the back lower part of first mounting bracket and can supply the spacing step that lower part leaned on before the latch hook hooked the lock post.

The utility model has the advantages that: the safety interlocking device of the rear door of the switch cabinet can interlock the switch of the rear door of the switch cabinet and the opening and closing of the grounding switch, so that the rear door can be opened only after the grounding switch is closed and grounded, and after the rear door is opened, the grounding switch can not be opened to disconnect the brake and the ground; additionally, the safety interlock of cubical switchboard back door all be suitable for high tension switchgear and low tension switchgear.

Drawings

Fig. 1 is a schematic view of the state of the safety interlock device of the rear door of the switch cabinet when the rear door is opened.

Fig. 2 is a schematic top view of the structure of fig. 1.

FIG. 3 is a schematic sectional view of the structure at A-A in FIG. 1.

Fig. 4 is a schematic diagram of the safety interlock device of the rear door of the switch cabinet of the present invention in a state of locking and timing when the rear door is closed.

FIG. 5 is a schematic structural view of a section B-B in FIG. 4.

FIG. 6 is a schematic structural view of a section C-C in FIG. 4.

Detailed Description

As shown in fig. 1, 2, 3, 4, 5 and 6, the safety interlock device for a rear door of a switchgear includes: install the operating axis 11 of the front and back trend in the cubical switchboard cabinet body 1, just, can drive earthing switch separating brake or closing a floodgate in the cubical switchboard behind the reversal operating axis 11, still include: the switch cabinet comprises a first mounting frame 2 arranged on a cabinet body at a rear door 7 of the switch cabinet, a lock rod 3 capable of moving back and forth is arranged on the first mounting frame 2 in a penetrating way, a lock hook 31 capable of swinging up and down is hinged at the rear end of the lock rod 3, the lock hook 31 is positioned at the rear part of the first mounting frame 2, a driving frame 4 is arranged in front of the first mounting frame 2, the lock rod 3 is fixed with the driving frame 4, so that the lock rod 3 can drive the driving frame 4 to move back and forth together with the driving frame, an elastic pressing mechanism capable of elastically pressing the driving frame 4 backwards to enable the driving frame 4 to abut against the first mounting frame 2 is also arranged on the first mounting frame 2, a second mounting frame 5 is arranged inside the switch cabinet body 1, a driving rod 51 capable of moving back and forth is arranged on the second mounting frame 5 in a penetrating way, an interlocking rod 52 is arranged on one side of the driving rod, so that the driving rod 51 can move back and forth with the interlocking rod 52, in this embodiment, the interlocking rod 52 and the driving rod 51 are fixed by screws, the driving rod 51 and the driving frame 4 are connected by the transmission rod 6 for transmission, so that the driving frame 4 can move back and forth with the driving rod 51, a lock post 71 is arranged on the inner side of the rear door 7 of the switch cabinet, a notch 72 is arranged on the lower part of the lock post 71, when the rear door 7 is closed, the lock post 71 can push the lock rod 3 forward against the elastic force of the elastic pressing mechanism under the driving of the rear door 7, so that the lock rod 3 can move forward with the lock hook 31 and the driving frame 4, the lock hook 31 can swing up by abutting against the first mounting frame 2 through the front lower part thereof after moving forward, so that the lock hook 31 can be hooked in the notch 72 on the lower part of the lock post 71, the driving frame 4 can drive the driving rod 51 to move forward with the driving rod 52, a stop 12 positioned on one side of the interlocking rod 52 is arranged on the side surface of the operating shaft 11, when the rear door 7 is opened, the interlocking rod 52 can stop the stop 12 to prevent the operating shaft 11 from rotating towards the direction of opening the grounding switch, so that the grounding switch is ensured to be switched on and grounded when the rear door 7 is opened; when the rear door 7 is closed, the interlocking rod 52 moves forward under the driving of the driving rod 51, so that the interlocking rod 52 does not block the stopper 12, and the operating shaft 11 can rotate towards the direction of opening the grounding switch; when the operating shaft 11 is rotated to disconnect the ground switch from the ground, the stopper 12 moves to the rear of the interlock lever 52 to block the interlock lever 52, so that the interlock lever 52 cannot move backward, the elastic pressing mechanism cannot reset the latch hook 31, and the latch hook 31 cannot open the rear door 7 after the ground switch is disconnected by hooking the lock cylinder 71.

In practical application, the driving end of the operating shaft 11 is located at the front part of the switch cabinet, the rear door 7 is located at the rear part of the switch cabinet, when the rear door 7 is manually closed but the grounding switch is not opened and grounded, in order to prevent the closed rear door 7 from being pushed open by the lock rod 3 when a person leaves the rotating operating shaft 11, the closed rear door 7 is temporarily fixed with the cabinet body through screws, and then the grounding switch is opened and grounded by rotating the operating shaft 11.

In the present embodiment, as shown in fig. 2 and 5, the structure of the elastic pressing mechanism includes: walk around towards wearing to locate the spring post 8 on first mounting bracket 2 and the drive frame 4, be provided with one on the rear end of spring post 8 and block boss 81, the cover is equipped with a reset spring 82 on blocking the spring post 8 between boss 81 and the first mounting bracket 2, the both ends of reset spring 82 lean on with blocking boss 81 and the counterbalance of first mounting bracket 2 respectively, make reset spring 82 can push away spring post 8 backward, it has one to be located drive frame 4 the place ahead and pushes away the top nut 83 that leans on with drive frame 4 counterbalance still to have a threaded connection on spring post 8, spring post 8 presses drive frame 4 backward through pushing away nut 83.

As shown in fig. 2 and 5, a guide plate 13 is further disposed at the front portion of the first mounting frame 2, two guide holes are disposed on the guide plate 13, the front end of the lock rod 3 passes through one guide hole, the front end of the spring post 8 passes through the other guide hole, and the two guide holes can respectively guide the lock rod 3 and the spring post 8 forward and backward.

As shown in fig. 5, the fixing structure between the lock lever 3 and the driving bracket 4 is: the locking rod 3 is provided with an installation step, the locking rod 3 penetrates through the driving frame 4, the driving frame 4 abuts against the installation step, the locking rod 3 is further in threaded connection with a locking nut 32, and the locking nut 32 can lock and press the driving frame 4 between the locking nut and the installation step, so that the driving frame 4 and the locking rod 3 are fixed.

As shown in fig. 1 and 4, an anti-jamming spring 33 capable of helping the locking hook 31 to return is disposed between the locking hook 31 and the rear end of the locking lever 3, and two ends of the anti-jamming spring 33 respectively abut against the locking hook 31 and the rear end of the locking lever 3. The anti-jamming spring 33 can help the locking hook 31 to reset, and prevent the locking hook 31 from jamming and being incapable of swinging downwards.

As shown in fig. 1 and 4, a screw hole is provided on the rear end surface of the lock cylinder 71, a mounting hole is provided on the rear door 7, the lock cylinder 71 can be mounted on the inner side of the rear door 7 by screwing the bolt 73 into the screw hole on the rear end of the lock cylinder 71 through the mounting hole from the outer side of the rear door 7, an indication cover 74 covering the mounting hole is further provided on the outer side of the rear door 7, and the bolt 73 can be removed from the outer side of the rear door 7 by lifting the indication cover 74 to expose the bolt 73, thereby removing the lock cylinder 71. This is provided for emergency unlocking of the rear door 7 when the interlock is stuck and the rear door 7 cannot be opened.

A limiting step 21 is arranged on the lower rear portion of the first mounting bracket 2 and can be abutted by the lower front portion of the locking hook 31 when the locking hook 31 hooks the locking column 71. This arrangement makes the operation of the latch hook 31 more reliable.

Safety interlock enable back door 7 only can open after earthing switch combined floodgate ground connection, back door 7 opens the back, earthing switch can't separating brake disconnection ground connection, only after back door 7 closes, earthing switch can only separating brake disconnection ground connection, after earthing switch separating brake disconnection ground connection, back door 7 will can't open.

Claims

1. Safety interlock of cubical switchboard back door includes: install the operating axis in the cubical switchboard cabinet body, can drive earthing switch separating brake or combined floodgate in the cubical switchboard behind the positive, reversal operating axis, its characterized in that: further comprising: the switch cabinet comprises a first mounting frame arranged on a cabinet body at the rear door of the switch cabinet, a lock rod capable of moving back and forth is arranged on the first mounting frame in a penetrating way, a lock hook capable of swinging up and down is hinged at the rear end of the lock rod and is positioned behind the first mounting frame, a driving frame is arranged in front of the first mounting frame and is fixed with the lock rod, so that the lock rod can drive the driving frame to move back and forth together, an elastic pressing mechanism capable of elastically pressing the driving frame backwards to enable the driving frame to abut against the first mounting frame is also arranged on the first mounting frame, a second mounting frame is arranged inside the switch cabinet body, a driving rod capable of moving back and forth is arranged on the second mounting frame in a penetrating way, an interlocking rod is arranged on one side of the driving rod and is fixed with the driving rod, so that the driving rod can drive the interlocking rod to move back and forth together, and forth, so that the driving frame can drive the driving rod to move back and forth together, a lock column is arranged on the inner side of the rear door of the switch cabinet, the lower part of the lock post is provided with a gap, when the back door is closed, the lock post can overcome the elasticity of the elastic pressing mechanism to push the lock rod forwards under the driving of the back door, so that the lock rod can drive the lock hook and the driving frame to move forwards together, the lock hook can swing upwards through the abutting of the front lower part of the lock hook and the first mounting frame after moving forwards, so that the lock hook can be hooked in the gap at the lower part of the lock column, the driving frame can drive the driving rod to drive the interlocking rod to move forwards through the driving rod after moving forwards, a stop block positioned on one side of the interlocking rod is arranged on the side surface of the operating shaft, when the rear door is opened, the interlocking rod can stop the stop block to enable the operating shaft not to rotate towards the direction of opening the grounding switch, and therefore closing and grounding of the grounding switch are guaranteed when the rear door is opened; when the rear door is closed, the interlocking rod can move forwards under the driving of the driving rod, so that the interlocking rod does not block the stop block, and the operating shaft can rotate towards the direction of opening the grounding switch; when the operating shaft is rotated to enable the grounding switch to be disconnected from the ground, the stop block can move to the rear of the interlocking rod to stop the interlocking rod, so that the interlocking rod cannot move backwards, the elastic pressing mechanism cannot enable the locking hook to reset, and the locking hook can enable the back door to be incapable of being opened after the grounding switch is disconnected by hooking the locking column.

2. The safety interlock device for a rear door of a switchgear cabinet according to claim 1, wherein: the structure of the elastic pressing mechanism comprises: walk around towards the spring post of wearing to locate on first mounting bracket and the carriage, be provided with one on the rear end of spring post and block the boss, the cover is equipped with a reset spring on blocking the spring post between boss and the first mounting bracket, reset spring's both ends respectively with block boss and first mounting bracket counterbalance and lean on, make reset spring can push away the spring post backward, it has one to be located the carriage the place ahead and pushes away the nut with the carriage counterbalance on the spring post still threaded connection, the spring post presses the carriage backward through pushing away the nut.

3. The safety interlock device for a rear door of a switchgear cabinet according to claim 2, wherein: the front part of the first mounting frame is also provided with a guide plate, the guide plate is provided with two guide holes, the front end of the lock rod penetrates through one guide hole, the front end of the spring column penetrates through the other guide hole, and the two guide holes can respectively guide the lock rod and the spring column in the front and back directions.

4. A safety interlock device for a rear door of a switchgear cabinet according to claim 1, 2 or 3, characterized in that: the fixing structure between the lock rod and the driving frame is as follows: the locking rod is provided with an installation step, the locking rod penetrates through the driving frame, the driving frame abuts against the installation step, the locking rod is further in threaded connection with a locking nut, and the locking nut can lock and press the driving frame between the driving frame and the installation step, so that the driving frame and the locking rod are fixed.

5. A safety interlock device for a rear door of a switchgear cabinet according to claim 1, 2 or 3, characterized in that: an anti-jamming spring capable of helping the locking hook to reset is arranged between the locking hook and the rear end of the locking rod, and two ends of the anti-jamming spring are respectively abutted against the rear ends of the locking hook and the locking rod.

6. A safety interlock device for a rear door of a switchgear cabinet according to claim 1, 2 or 3, characterized in that: the rear end face of the lock column is provided with a threaded hole, the rear door is provided with a mounting hole, the bolt penetrates through the mounting hole from the outer side of the rear door and is screwed into the threaded hole in the rear end of the lock column, the lock column can be mounted on the inner side of the rear door, the outer side of the rear door is further provided with an indicating cover covering the mounting hole, the indicating cover is lifted to expose the bolt, and then the bolt can be dismounted from the outer side of the rear door, so that the lock column is dismounted.

7. A safety interlock device for a rear door of a switchgear cabinet according to claim 1, 2 or 3, characterized in that: the lower part is provided with one on the back lower part of first mounting bracket and can supply the spacing step that lower part leaned on before the latch hook hooked the lock post.