CN203387100U - Cabinet interlocking device preventing false closing of grounding knife switch after pushing handcart in - Google Patents

Abstract

The utility model relates to a cabinet interlocking device preventing false closing of a grounding knife switch after pushing a handcart in. The device comprises a cabinet body, a rotatable control rod for opening and closing the grounding knife switch is arranged in the cabinet body, and the tail end of the control rod penetrates out of the cabinet body and includes an outer hexagon structure; a spacer sleeve which can slide in a reciprocating manner is sleeved on the tail end of the control rod, and is elastically connected with the cabinet body, and the initial position of the tail end of the spacer sleeve is levered with the tail end of the control rod; a limit rod which can be blocked and spaced extends out of the front end of the spacer sleeve, a stopper used for blocking the limit rod and capable of moving up and down is elastically connected with the cabinet body in front of the limit rod, and a transverse through hole is formed in the stopper at a position corresponding to the limit rod; and the lower end of the stopper is connected with a pressure plate via a connecting rod, the pressure plate is positioned in a closing area of the push-in handcart and used for controlling up and down movement of the stopper, and the pressure plate is pressed down and drives the stopper to move downwards after the handcart is pushed in and closing is carried out. The cabinet interlocking device employs a mechanical structure, is simple in structure and convenient to operate, and is reliable and durable.

Description

Interlocking device in the switch cabinet to prevent the ground knife from being closed by mistake after the handcart is pushed in

technical field

The invention relates to an interlocking device in a switchgear for preventing a ground knife from being closed by mistake after a handcart is pushed in. the

Background technique

The high-voltage switchgear includes a cabinet body, a ground knife located in the cabinet, and a ground knife control lever located in the operating room for controlling the closing and opening of the ground knife. In order to ensure the safety of the staff to the greatest extent, the grounding room of the high-voltage switchgear is required to have a reliable interlock device to prevent misuse. One of the things that must be done is: when the handcart is in the working state of the switch, in order to ensure safety, the ground knife cannot be manipulated. The control lever closes the ground knife. Only when the handcart is in the opening test state, can the ground knife control lever be operated to close the ground knife. the

At present, there is no good interlocking device that can meet the above requirements, and it is mainly controlled by the staff manually, which has a high degree of danger. the

Contents of the invention

The purpose of this utility model is to provide an interlocking device in the switch cabinet to prevent the ground knife from being closed by mistake after the handcart is pushed in. The ground knife is closed by mistake to ensure safety. the

The present invention is realized through the following technical solutions: an interlocking device for preventing the false closing of the ground knife after the handcart is pushed in the switch cabinet, including: a cabinet body, in which a rotatable switch for opening and closing the ground knife Control rod, the end of the control rod passes through the cabinet from the inside to the outside and its end structure is an outer hexagonal structure that can be matched with a socket wrench; There is an elastic connection between the cover and the cabinet body, and the initial position of the end of the stopper is flush with the end of the control rod; The upper elastic is connected with a limit block for blocking the limit rod and can move up and down, and a transverse through hole is opened on the position corresponding to the limit rod on the limit block; Pushing the handcart into the closing area is used to control the pressure plate that the limit block moves up and down. The pressure plate is pressed down after the handcart is pushed into the closing area and drives the limit block to move down. the

Further, the stop sleeve is elastically connected to the cabinet body through the spring sleeved on the control rod; the stop rod is connected to the stop sleeve through a thread structure; the stop block is connected to the cabinet body through the spring at the lower end Elastic connection between. the

The invention has the advantages that the interlocking device can prevent the handcart in the switch cabinet from misoperation of the ground knife control lever when closing the switch, thereby ensuring safety, and the invention adopts a mechanical structure, which is simple in structure, convenient in operation, reliable and durable. the

Description of drawings

Fig. 1 is the closing state schematic diagram of the present invention;

Fig. 2 is a schematic diagram of the opening state of the present invention;

Fig. 3 is a structural schematic diagram of the present invention when the interlock is open and can be closed;

Fig. 4 is a structural schematic diagram of the present invention when the interlocking state cannot be closed;

Fig. 5 is a structural schematic diagram of a limiting block and a limiting rod of the present invention;

Fig. 6 is a schematic diagram of the use state of the limiting block and the limiting rod of the present invention;

As shown in the figure, it includes: a cabinet body 1, a floor knife 2, a control rod 3, a retaining sleeve 4, a limit rod 5, a limit block 6, a connecting rod 7, a pressure plate 8, and a through hole 65.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. the

As shown in Figures 1 to 6, an interlocking device for preventing the false closing of the ground knife after the handcart is pushed in the switch cabinet provided by the present invention includes: a cabinet body 1, which is provided with a ground knife 2. A rotatable control rod 3 for opening and closing. The end of the control rod 3 passes through the cabinet 1 from the inside to the outside and its end structure is an outer hexagonal structure that can be matched with a socket wrench; the end of the control rod 3 A reciprocating and slidable retaining sleeve 4 is sleeved, and the retaining sleeve 4 is elastically connected to the cabinet body 1 through a spring sleeved on the control rod. The initial position of the stopper 4 end is flush with the control rod 3 end. When it is necessary to switch the floor knife 2, the switch is completed by cooperating with the hexagon socket wrench at the end of the control rod 3 and rotating. Because the stop sleeve 4 can reciprocally slide on the control rod 3, so when using the hexagon socket wrench, the stop sleeve 4 is pushed forward to allow the wrench space on the control rod 3. the

In order to realize interlocking, a stop rod 5 that can be used to limit the movement of the stop sleeve 4 is installed on the front end of the stop sleeve 4. On the cabinet body 1 at the front end of the stop rod 5, a spring is connected with a stop bar that can be connected with the stop. A limit block 6 that is matched with the rod and can move up and down. The limit block 6 is provided with a transverse through hole 65 corresponding to the limit rod 5; when the limit block 6 is in the reset state, the limit rod 5 can pass through Through hole 65, the blocking sleeve 4 is pushed forward. The lower end of the limit block 6 is connected with a pressing plate 8 positioned at the handcart and pushed into the closing area for controlling the up and down movement of the limit block 6 through the connecting rod 7, and the pressing plate 8 is pressed down after the handcart is pushed into the closing area Drive the limit block 6 to move down, after the limit block 6 moves down, the through hole 65 and the limit rod 5 are misaligned, then the limit rod 5 cannot pass through the through hole 65, and the stop sleeve 4 is against the limit block 6 cannot be pushed forward, so that the Allen socket wrench cannot be set on the control rod 3 to switch. the

In addition, the limit rod 7 is connected with the stop sleeve 4 through a threaded structure, which can be used to adjust the relative position between the limit rod 7 and the limit block 6 to ensure the accuracy of interlocking. the

The present invention is not limited to the above-mentioned best implementation mode, and anyone can obtain other various forms of products under the enlightenment of the present invention. All equivalent changes and modifications made according to the patent scope of the present invention shall fall within the scope of the present invention. the

Claims (4)

1. prevent that handcart from pushing the interlock of rear ground cutter false switching in a switch cubicle, comprise: cabinet, it is characterized in that: be provided with the rotatable control lever for ground cutter divide-shut brake in described cabinet, described control lever end passes cabinet and the outer-hexagonal structure of its end structure for coordinating with box spanner from inside to outside; Described control lever end is socketed with interstage sleeve sliding back and forth, and between described interstage sleeve and cabinet, for elasticity is connected, the initial position of interstage sleeve end is concordant with the control lever end; Described interstage sleeve front end stretches out and can be blocked spacing gag lever post, on the cabinet of described gag lever post front position, is elasticly connected with for stopping gag lever post and the guide vane end stop that can move up and down, and on described guide vane end stop, with the gag lever post corresponding position, offers horizontal through hole; Described guide vane end stop lower end is connected with and is positioned at handcart and pushes the pressing plate that the combined floodgate district moves up and down for controlling guide vane end stop by connecting rod, and described pressing plate is depressed and drives guide vane end stop and moves down after handcart pushes combined floodgate.

2. prevent in switch cubicle according to claim 1 that handcart from pushing the interlock of rear ground cutter false switching, is characterized in that: described interstage sleeve is connected by being sheathed on elasticity between spring on control lever and cabinet.

3. prevent in switch cubicle according to claim 1 that handcart from pushing the interlock of rear ground cutter false switching, it is characterized in that: described gag lever post is connected with interstage sleeve by helicitic texture.

4. prevent in switch cubicle according to claim 1 that handcart from pushing the interlock of rear ground cutter false switching, is characterized in that: between the spring of described guide vane end stop by its lower end and cabinet, elasticity is connected.

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