A double-door interlocking mechanism

Abstract

This utility model discloses a double-door interlocking mechanism, including a lock plate disposed between a movable door and a locked door. A pivot is inserted through the middle of the lock plate, and a locking rod is provided on the locked door for movement within a set range. One end of the lock plate is provided with an abutment end for abutting against the movable door, and the other end is provided with a locking end for abutting against the locking rod. This utility model uses a movable lock plate in conjunction with a locking rod to link the opening and closing of the movable door and the locked door, achieving the effect that the movable door must close before the locked door can be locked. This enforces the closing sequence, avoids accidental operation, meets the five-proof requirements of the switch cabinet, and improves safety.

Description

Technical Field

[0001] This utility model belongs to the field of switchgear and relates to a double-door interlocking mechanism. Background Technology

[0002] High-voltage dedicated power distribution rooms are typically equipped with 10kV armored switchgear. Due to the high voltage level, in order to ensure the safe operation of personnel and the power grid, it is necessary to technically eliminate human error and prevent electrical misoperation accidents. The switchgear must meet the five protection requirements.

[0003] Switchgear equipment typically consists of multiple cabinets. Existing switchgear door locking devices are usually single-door single-lock, with few interlocking structures between different cabinet doors. Operators need to operate each door independently, which requires high operational standards from the operators and inevitably leads to incorrect or missed closing. In particular, some cabinets in switchgear equipment are highly interconnected and have requirements for the order in which the cabinet doors are closed. Therefore, the single-door single-lock method is difficult to meet the current operational requirements. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a double-door interlocking mechanism.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A double-door interlocking mechanism includes a lock plate disposed between a movable door and a locked door. A pivot is passed through the middle of the lock plate. The locked door is provided with a locking rod for moving within a set range. One end of the lock plate is provided with an abutment end for abutting against the movable door, and the other end is provided with a locking end for abutting against the locking rod.

[0007] Furthermore, the movable door and the locking door open and close relative to each other.

[0008] Furthermore, it also includes a mounting bracket, to which the rotating shaft is fixedly connected.

[0009] Furthermore, a torsion spring is fitted onto the rotating shaft, and the two ends of the torsion spring are respectively connected to the locking plate and the mounting bracket.

[0010] Furthermore, the mounting bracket is provided with a stop block, and the locking plate abuts against the stop block when it is in a set rotation position.

[0011] In summary, the advantages of this utility model are as follows:

[0012] This utility model uses a movable locking plate in conjunction with a locking rod to link the opening and closing of the movable door and the locking door, so that the movable door can be closed before the locking door can be locked. This enforces the closing sequence, avoids misoperation, meets the five protection requirements of the switch cabinet, and improves safety. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 for Figure 1 An enlarged diagram of A in the diagram.

[0015] Figure 3 for Figure 2 A schematic diagram of the structure under the unlocked position of the central locking plate.

[0016] The diagram shows: 1. Structural frame; 11. Movable door; 12. Locking door; 2. Lock plate; 21. Abutting end; 22. Locking end; 3. Mounting bracket; 31. Rotating shaft; 32. Torsion spring; 33. Stop block; 4. Locking rod. Detailed Implementation

[0017] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0018] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0019] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0020] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of this utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0021] This embodiment provides a double-door interlocking mechanism, which is applicable to electrical switchgear. When multiple doors are in use, the double-door interlocking mechanism is used to limit the operation sequence of multiple doors, avoid accidental operation of electrical interlocking, and achieve the five electrical protection requirements.

[0022] Specifically, refer to Figures 1 to 3 The double-door interlocking mechanism includes a mounting bracket 3, a rotating shaft 31, a locking plate 2, and a locking rod 4. The mounting bracket 3 is used to fix the switch equipment inside the switch equipment. The switch equipment includes a structural frame 1, on which two door frames are formed for setting the movable door 11 and the locking door 12, respectively. The opening and closing directions of the movable door 11 and the locking door 12 are arranged opposite to each other. The mounting bracket 3 is fixedly connected to the structural frame 1 by bolts or rivets, and the mounting bracket 3 is located between the movable door 11 and the locking door 12.

[0023] The rotating shaft 31 is fixedly connected to the mounting bracket 3. A through hole is provided in the middle of the locking plate 2. The locking plate 2 is installed on the rotating shaft 31 by passing the rotating shaft 31 through the through hole, and the locking plate 2 can rotate relative to the rotating shaft 31. A torsion spring 32 is sleeved on the rotating shaft 31. The two ends of the torsion spring 32 are respectively connected to the locking plate 2 and the mounting bracket 3. The torsion spring 32 forms a torque in a set direction on the locking plate 2, so that the locking plate 2 is maintained at a set angle position when no other external force is applied.

[0024] Furthermore, a stop block 33 is provided on the mounting bracket 3. The locking plate 2 abuts against the stop block 33 under the action of the torsion spring 32. This position of the locking plate 2 is the locking position for locking the locking rod 4. Specifically, one end of the locking plate 2 is set as the abutting end 21, which is used to abut against the movable door 11. The locking rod 4 is set on the locking door 12. The other end of the locking plate 2 is set as the locking end 22 for abutting against the locking rod 4.

[0025] The locking door 12 is equipped with a locking structure to lock and fix the locking door 12 to the structural frame 1, keeping the locking door 12 in the closed state. The locking rod 4 will move down / up in linkage with the locking / unlocking action of the locking structure.

[0026] Reference Figure 2 When the movable door 11 is not closed, the movable door 11 does not contact the abutting end 21 of the lock plate 2. The lock plate 2 is in the locked position. At this time, the locking end 22 is located in the movement path of the lock rod 4. When it is desired to lock the closed door 12, the downward movement of the lock rod 4 will be blocked by the locking end 22, thus preventing the closed door 12 from being locked.

[0027] Reference Figure 3When the movable door 11 is in the closed state, the movable door 11 abuts against the abutting end 21 of the lock plate 2 and rotates the lock plate 2 by a set angle to be in the unlocked position. The locking end 22 of the lock plate 2 in the unlocked position does not fall in the action path of the lock rod 4. Therefore, the locking door 12 can perform the closing and locking operation at this time.

[0028] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort should fall within the protection scope of this utility model.

Claims

1. A double-door interlocking mechanism, characterized in that, It includes a lock plate (2) disposed between the movable door (11) and the locked door (12), with a pivot (31) passing through the middle of the lock plate (2), and a locking rod (4) disposed on the locked door (12) for moving within a set range. One end of the lock plate (2) is provided with an abutting end (21) for abutting against the movable door (11), and the other end is provided with a locking end (22) for abutting against the locking rod (4).

2. The double-door interlocking mechanism according to claim 1, characterized in that, The movable door (11) and the locking door (12) open and close relative to each other.

3. The double-door interlocking mechanism according to claim 1, characterized in that, It also includes a mounting bracket (3), to which the rotating shaft (31) is fixedly connected.

4. The double-door interlocking mechanism according to claim 3, characterized in that, A torsion spring (32) is fitted on the rotating shaft (31), and the two ends of the torsion spring (32) are respectively connected to the locking plate (2) and the mounting bracket (3).

5. A double-door interlocking mechanism according to claim 3, characterized in that, The mounting bracket (3) is provided with a stop (33), and the locking plate (2) abuts against the stop (33) in a set rotation position.

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