A pneumatic load switch with five-proof cabinet door interlocking

Abstract

A pneumatic load switch with a five-proof cabinet door interlock includes a cabinet door interlock latch and a pneumatic load switch operating mechanism. The cabinet door interlock includes a retractable bolt, a door lock plate linked to the operating shaft of the grounding switch, and a cabinet door interlock latch. When the grounding switch is closed, the bolt drive plate is linked to the cabinet door interlock latch, limiting the bolt's extension / retraction state by controlling the open / closed state of the cabinet door. This controls the allow / disallow operation of the grounding switch operating hole, thereby controlling the allow / disallowed opening operation of the grounding switch. When the grounding switch is opened / closed using the operating handle, the door lock plate is linked to the grounding switch indicator rotating element, and the operating shaft drives the grounding switch indicator rotating element to rotate, controlling the extension / retraction state of the door lock plate; thus unlocking / locking the cabinet door. During maintenance or when the cabinet door is open, manually pressing the bolt drive plate simulates the cabinet door being closed.

Description

A pneumatic load switch with five-proof cabinet door interlocking Technical Field

[0001] This invention relates to the field of load switch technology, specifically to a pneumatic load switch with a five-proof cabinet door interlock. Prior Technology

[0002] Pneumatic load switches are switching devices capable of closing, carrying, and interrupting current under normal conductive circuit conditions or specified overload conditions, and also capable of carrying current for a specified time under abnormal conductive circuit conditions. Existing pneumatic load switches require tightening the unlocking button on the cabinet door to unlock the grounding switch operating hole when the grounding switch needs to be tripped, which is cumbersome. Furthermore, due to unavoidable installation errors between the load switch and the switch cabinet housing, the unlocking lever is prone to jamming during installation and commissioning, resulting in low production efficiency and the inability to unlock. Summary of the Invention

[0003] In view of the above-mentioned technical problems in the existing technology, this invention provides a five-proof cabinet door interlocking pneumatic load switch, including an interlocking latch on the cabinet door and an operating mechanism of the pneumatic load switch. The cabinet door interlocking includes a retractable door bolt, a door lock plate connected to the operating shaft of the grounding switch, and an interlocking latch on the cabinet door.

[0004] This invention provides a pneumatic load switch for a five-proof cabinet door interlock. The operating mechanism includes a mechanism panel, a door bolt transmission plate, a grounding knife operating hole, and a door bolt.

[0005] This invention provides a pneumatic load switch for a five-proof cabinet door interlock. The retractable bolt consists of a bolt, a bolt drive plate, a bolt support plate, a spring, a spring limit pin, and a limit pin. The bolt support plate is fixed to the inner side of the operating mechanism panel by welding. The bolt, bolt drive plate, and bolt support plate are connected sequentially by a pivot pin. One end of the bolt protrudes from the mechanism panel and is linked to the top plate of the cabinet door interlock; the other end is horizontally inserted into the wall of the operating hole of the floor switch. [Connect] A telescopic locking position is formed inside the operating hole of the ground knife.

[0006] This invention provides a pneumatic load switch for a five-proof cabinet door interlock. The door lock plate is supported and its sliding direction is limited by a door lock plate pad and a door lock support plate, which are fixed to the mechanism panel by welding. The door lock plate has a hole on each side of the door lock support plate for installing a limit pin. One side of the door lock plate is bent at a right angle in a "Z" shape and has a rectangular hole.

[0007] This invention provides a pneumatic load switch with a five-proof cabinet door interlock. The cabinet door interlock buckle is a square ring shape, consisting of a cabinet door interlock cover plate and a cabinet door interlock top plate. The two are clamped and fixed to the cabinet door, corresponding to the positions of the telescopic interlock rod and interlock plate in the load switch mechanism. Simple Explanation of the Diagram

[0008] Figure 1 is a diagram of a pneumatic load switchgear.

[0009] [Figure 2] is a diagram of the pneumatic load switch in this work.

[0010] [Figure 3] is a view of the interlocking fasteners between the creative agency and the cabinet door.

[0011] [Figure 4] is a side and rear view of the creative unit and the cabinet door interlocking top panel.

[0012] [Figure 5] is a view of the parts within the panel of this creative mechanism.

[0013] [Figure 6] is a view of the parts within the panel of this creative mechanism.

[0014] [Figure 7] is a diagram of the retractable door bolt parts for this project.

[0015] [Figure 8] is a diagram of the cabinet door interlocking fastener parts for this project. Implementation

[0016] Please refer to Figures 3 to 8. This invention provides a five-proof cabinet door interlocking pneumatic load switch, including an interlocking buckle (4) on the cabinet door and an operating mechanism (X) for the pneumatic load switch. The cabinet door interlocking includes a retractable door bolt (2), a door lock plate (31) connected to the operating shaft of the grounding switch, and an interlocking buckle (4) on the cabinet door. The following are descriptions of each: The retractable door bolt (2) is composed of a door bolt (21), a door bolt transmission plate (22), a door bolt support plate (23), a spring (27), a spring limit pin (26), and a limit pin (25); The door bolt support plate (23) is fixed to the inside of the operating mechanism panel (6) by welding; The door bolt (21), the door bolt transmission plate (22), and the door bolt support plate (23) are connected in sequence by a shaft pin (24). One end of the bolt (21) extends through the mechanism panel (6) and is linked to the cabinet door interlock top plate (41); the other end is inserted horizontally into the grounding switch operating hole wall (51), forming a telescopic locking position in the grounding knife operating hole (5). The bolt (21) is limited by the limit pin (25) and the bolt limit hole (61) on the mechanism panel (6). When the grounding switch is in the open state, the bolt (21) extends towards the grounding switch operating hole wall (51) under the action of the spring (27), locking the grounding knife operating hole (5) and prohibiting the grounding knife from being opened; when the switch cabinet door (1) is closed, the cabinet door interlock top plate (41) presses the bolt transmission plate (22), and the bolt (21) extends towards the cabinet door interlock top plate (41), locking the switch cabinet door (1) and allowing the grounding switch to be operated.

[0017] The door lock plate (31) is supported and its sliding direction is limited by the door lock plate pad (32) and the door lock support plate (33), which are fixed to the mechanism panel (6) by welding. The door lock plate (31) has a door lock plate limiting pin hole (35) on each side of the door lock support plate (33) for installing the limiting pin. One side of the door lock plate is bent at a right angle in a "Z" shape and has a rectangular square hole (36), which is connected to the grounding switch indicator shaft hook (34) through the square hole (36). When the grounding switch is operated to open, the operating handle is turned to drive the grounding shaft to move counterclockwise. The door lock plate (31) moves towards the cabinet door interlock top plate (41) under the action of the grounding switch indicator shaft hook (34), locking the switch cabinet door (1).

[0018] The cabinet door interlocking buckle is a square ring, consisting of a cabinet door interlocking cover plate (42) and a cabinet door interlocking top plate (41). The two clamp the cabinet door for installation and fixation. The cabinet door interlocking cover plate (42) has two 8mm countersunk holes (421), and the cabinet door interlocking top plate (41) has a 6mm threaded hole (411). When the grounding switch is tripped, the door lock plate (31) extends and locks the inside of the cabinet door interlocking top plate (41), at which time the switch cabinet door (1) is locked.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this invention, and are not intended to limit the scope of protection of this invention. Although this invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this invention without departing from the essence and scope of the technical solutions of this invention.

[0020] 1: Switch cabinet door

[0021] 2: Retractable bolt

[0022] 21: Door bolt

[0023] 22: Door bolt drive plate

[0024] 23: Door bolt support plate

[0025] 24: Shaft pin

[0026] 25: Limit pin

[0027] 26: Spring limit pin

[0028] 27: Spring

[0029] 31: Door lock plate

[0030] 32: Door lock plate

[0031] 33: Door lock support plate

[0032] 34: Grounding switch indicator shaft hook

[0033] 35: Door lock plate limit pin hole

[0034] 36: Square Hole

[0035] 4: Chain buckle

[0036] 41: Cabinet door interlock top panel

[0037] 42: Cabinet door interlock cover

[0038] 411: Threaded hole

[0039] 421: Countersunk Hole

[0040] 5: Grounding switch operating hole

[0041] 51: Grounding switch operating hole wall

[0042] 6: Mechanism Panel

[0043] 61: Door bolt limit hole

[0044] X: Operating mechanism

Claims

1. A pneumatic load switch with a five-proof cabinet door interlock, comprising: The switchgear cabinet door is equipped with an interlocking latch and an operating mechanism for the pneumatic load switch. The operating mechanism includes a mechanism panel, a door bolt drive plate, a grounding switch operating hole, and a door bolt. The cabinet door interlock includes a retractable door bolt, a door lock plate connected to the grounding switch operating shaft, and an interlocking latch on the cabinet door. The interlocking latch is located on the side of the operating mechanism. After the cabinet door is closed, the interlocking latch's cabinet door interlocking top plate presses against the door bolt drive plate of the mechanism, thereby causing the door bolt to extend out of the operating mechanism. Ultimately, the grounding switch can be tripped. At the same time, due to the extension of the door bolt, the cabinet door cannot be opened at this time. Conversely, the cabinet door can only be opened when the door bolt retracts into the operating mechanism after the grounding switch is closed.

2. The pneumatic load switch for the five-proof cabinet door interlock as described in claim 1, wherein the retractable door bolt is composed of a door bolt, a door bolt transmission plate, a door bolt support plate, a spring, a spring limiting pin, and a displacement limiting pin; one end of the door bolt passes through the mechanism panel and is linked to the cabinet door interlock top plate, and the other end is inserted horizontally into the wall of the ground knife operating hole, forming a telescopic locking position in the ground knife operating hole.

3. The pneumatic load switch for the five-proof cabinet door interlock as described in claim 2, wherein the door bolt support plate is fixed to the inner side of the operating mechanism panel by welding, and the door bolt, door bolt transmission plate, and door bolt support plate are connected in sequence by axle pins.

4. The pneumatic load switch for the five-proof cabinet door interlock as described in claim 2, wherein the mechanism panel has a retractable bolt extension clearance hole and a displacement limiting hole, and the grounding operation hole wall has a clearance hole.

5. The pneumatic load switch for the five-proof cabinet door interlock according to claim 1, wherein the door lock plate extends and retracts in conjunction with the hook of the grounding switch indicator shaft, and is supported and has its sliding direction defined by the door lock plate pad and the door lock support plate.

6. The pneumatic load switch for the five-proof cabinet door interlock as described in claim 5, wherein the door lock plate and the door lock support plate are welded to the mechanism panel, and the holes are kept level and do not misalign.

7. The pneumatic load switch for the five-proof cabinet door interlock as described in claim 5, wherein a door lock plate has a door lock plate limit pin hole on each side of the door lock support plate to install a limit pin, and one side of the door lock plate is bent at a right angle in a "Z" shape and has a rectangular hole, which is connected to the grounding switch indicator shaft hook through the square hole.

8. The pneumatic load switch with five-proof cabinet door interlocking as described in claim 1, wherein the cabinet door interlocking buckle is a square ring shape, consisting of a cabinet door interlocking cover plate and a cabinet door interlocking top plate, wherein the cabinet door interlocking cover plate has two 8mm countersunk holes, and the cabinet door interlocking top plate has a 6mm threaded hole, and the two clamp the cabinet door for installation and fixation.

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