Novel mechanical interlocking device for front quick-plug door of environment-friendly gas cabinet

Abstract

The utility model discloses a novel mechanical interlocking device for a front quick-plug door of an environment-friendly gas cabinet, which belongs to the technical field of interlocking protection of environment-friendly cabinets and comprises a quick-plug door mounted on the upper portion of a cabinet body, an interlocking hook plate and an interlocking bolt sheet are arranged on the upper portion of the inner surface of the quick-plug door, and the interlocking hook plate is matched with a door locking mechanism. The door locking mechanism is arranged on the support of the grounding switch and matched with the grounding operation shaft, the grounding operation shaft is matched with the grounding interlocking mechanism to be connected, the grounding interlocking mechanism is connected with the unlocking mechanism, and the unlocking mechanism is matched with the interlocking bolt piece. When the quick-plug door is closed, the interlocking bolt sheet is matched with the unlocking mechanism to expose the grounding operation shaft, so that the grounding operation shaft is rotated by the handle to realize the opening of the grounding switch, and the door lock mechanism is matched with the interlocking hook plate to lock the quick-plug door, so that the quick-plug door cannot be opened, the door is prevented from entering an electrified compartment by mistake, and the five-prevention requirement is met; otherwise, when the grounding switch is switched on, the quick-plug door can be opened (without electricity) to ensure safety.

Description

Technical Field

[0001] The utility model relates to a mechanical interlocking device in the technical field of circuit breaker assembly. Background Art

[0002] A ring main unit is a set of high-voltage switchgear installed in a steel plate metal cabinet or made into a assembled sectionalized ring main power supply unit. Its core part adopts an earthing switch and a fuse, and has the advantages of simple structure, small volume, low price, improved power supply parameters and performance, and power supply safety. It is widely used in distribution substations and box-type substations in load centers such as urban residential quarters, high-rise buildings, large public buildings, and industrial enterprises. However, for the ring main unit switch currently in use, its interlocking device has a relatively complex structure, high precision requirements for processing and assembly, and is prone to failures due to many components, and it is also inconvenient to operate. Content of the Utility Model

[0003] The purpose of the utility model is to provide a mechanical interlocking device for the front quick-insert door of a new type of environmental protection gas cabinet, which has a simpler and more delicate structure and is convenient and not complicated to operate.

[0004] To achieve the above purpose, the utility model provides a mechanical interlocking device for the front quick-insert door of a new type of environmental protection gas cabinet, which includes a quick-insert door installed on the upper part of the cabinet body. An interlocking hook plate and an interlocking pin piece are arranged on the upper part of the inner surface of the quick-insert door. The interlocking hook plate is matched with a door locking mechanism. The door locking mechanism is arranged on the bracket of the earthing switch and is matched with an earthing operating shaft. The earthing operating shaft is equipped with an earthing interlocking mechanism connected thereto, the earthing interlocking mechanism is connected to an unlocking mechanism, and the unlocking mechanism is matched with the interlocking pin piece.

[0005] Compared with the prior art, the beneficial effect of the utility model lies in that when the quick-insert door is closed, the interlocking pin piece will cooperate with the unlocking mechanism to expose the earthing operating shaft, so that the earthing switch is tripped by turning the earthing operating shaft with a handle. In this way, the door locking mechanism will cooperate with the interlocking hook plate to lock the quick-insert door, so that the quick-insert door cannot be opened, preventing accidental entry into the live compartment and meeting the five-prevention requirements. On the contrary, when the earthing switch is closed, the quick-insert door can be opened (when there is no power), ensuring safety.

[0006] As a further improvement of the utility model, the door locking mechanism includes a U-shaped lock head. One side of the U-shaped lock head is matched with a hook groove opened at the upper front end of the interlocking hook plate. The other side of the U-shaped lock head is connected to the lower end of an interlocking swing rod. The middle part of the interlocking swing rod is connected to the bracket of the earthing switch through a pin shaft. The upper end of the interlocking swing rod is matched with a rotating retaining piece. The rotating retaining piece is sleeved on the earthing operating shaft. The upper part of the interlocking swing rod is connected to one end of a tension spring. The other end of the tension spring is connected to the bracket of the earthing switch.

[0007] One side of the U-shaped lock is inserted into the hook groove of the interlocking hook plate, so that the quick-opening door cannot be opened outward. By rotating the grounding operating shaft, the grounding switch is in the closing state. At the same time, the rotating baffle pushes up the interlocking swing rod, causing the U-shaped lock head to lift upward, thus disengaging from the hook groove of the interlocking hook plate. Only in this way can the quick-opening door be opened.

[0008] As a further improvement of the present utility model, the unlocking mechanism includes a baffle connecting plate. The upper part of the baffle connecting plate is connected to the grounding interlocking mechanism. A jack is provided at the lower part of the baffle connecting plate. The interlocking pin plate includes a top plate. One side of the top plate is connected to a side plate. The front end of the side plate is processed with an inclined surface, and the inclined surface matches the jack.

[0009] When the quick-opening door is closed, the interlocking pin plate is inserted into the jack at the lower part of the baffle connecting plate. The inclined surface at the front end of the interlocking pin plate can press down the jack顺势, so that the baffle connecting plate moves downward, driving the grounding interlocking mechanism to act, thus realizing interlocking protection.

[0010] As a further improvement of the present utility model, the grounding interlocking mechanism includes a sliding bracket. The outer side of the sliding bracket is connected to a grounding baffle, which matches the grounding operating shaft. The inner side of the sliding bracket is hinged to the rear end of a sliding swing rod. The middle part of the sliding swing rod is hinged to the bracket of the grounding switch. The front end of the sliding swing rod matches the rotating baffle. The sliding bracket is sleeved on a positioning column, and the positioning column is arranged on a mounting frame. The mounting frame is arranged on the bracket of the grounding switch. A compression spring is arranged between the bottom of the sliding bracket and the mounting frame, and the compression spring is sleeved on the positioning column. The sliding bracket is connected to the upper part of the baffle connecting plate.

[0011] In this way, when the sliding bracket moves downward, the grounding baffle can be moved downward to expose the grounding operating shaft, facilitating the operation of grounding closing and opening. When the sliding bracket moves upward, the grounding baffle moves upward to block the grounding operating shaft, so that the operation of grounding closing and opening cannot be carried out. Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of the present utility model.

[0013] Figure 2 It is a schematic diagram of the internal structure of the present utility model.

[0014] Figure 3 It is a schematic structural diagram of the present utility model in a state where the quick-opening door can be opened.

[0015] Figure 4 It is a schematic structural diagram of the present utility model in a state where the quick-opening door cannot be opened.

[0016] Figure 5 It is Figure 2 The partial enlarged view at A in

[0017] Figure 6 is Figure 3 the partial enlarged view of part B in

[0018] Figure 7 is Figure 4 the partial enlarged view of part C in

[0019] Figure 8 the schematic view of the cooperation between the U-shaped lock and the interlocking hook plate of the present utility model.

[0020] Fig. 9 the schematic view of the cooperation between the baffle connecting plate and the interlocking plug pin plate of the present utility model.

[0021] Wherein, 1 is the cabinet body, 2 is the interlocking hook plate, 3 is the interlocking plug pin plate, 4 is the quick insertion door, 5 is the earthing switch, 6 is the positioning column, 7 is the sliding bracket, 8 is the sliding swing rod, 9 is the earthing operating shaft, 10 is the rotating baffle, 11 is the earthing baffle, 12 is the interlocking swing rod, 13 is the U-shaped lock head, 14 is the tension spring, 15 is the baffle connecting plate, 16 is the hook groove, 17 is the inclined surface, 18 is the jack. Specific embodiments

[0022] The present utility model will be further described below in conjunction with the accompanying drawings:

[0023] As Figure 1-9 shown in a new type of environmentally friendly gas cabinet front quick insertion door mechanical interlocking device, which includes a quick insertion door 4 installed on the upper part of the cabinet body 1. The upper part of the inner surface of the quick insertion door 4 is provided with an interlocking hook plate 2 and an interlocking plug pin plate 3. The interlocking hook plate 2 is matched with the door locking mechanism. The door locking mechanism is arranged on the bracket of the earthing switch 5 and is matched with the earthing operating shaft 9. The earthing operating shaft 9 is equipped with an earthing interlocking mechanism connected thereto, and the earthing interlocking mechanism is connected with the unlocking mechanism, and the unlocking mechanism is matched with the interlocking plug pin plate 3.

[0024] The door locking mechanism includes a U-shaped lock head 13. One side of the U-shaped lock head 13 is matched with the hook groove 16 opened at the upper front end of the interlocking hook plate 2. The other side of the U-shaped lock head 13 is connected to the lower end of the interlocking swing rod 12. The middle part of the interlocking swing rod 12 is connected to the bracket of the earthing switch 5 through a pin shaft. The upper end of the interlocking swing rod 12 is matched with the rotating baffle 10. The rotating baffle 10 is sleeved on the earthing operating shaft 9. The upper part of the interlocking swing rod 12 is connected to one end of the tension spring 14, and the other end of the tension spring 14 is connected to the bracket of the earthing switch 5.

[0025] The unlocking mechanism includes a baffle connecting plate 15, the upper part of which is connected to the earthing interlocking mechanism. The lower part of the baffle connecting plate 15 is provided with a jack 18. The interlocking plug pin plate 3 includes a top plate. One side of the top plate is connected with a side plate, and the front end of the side plate is processed with an inclined surface 17, and the inclined surface 17 is matched with the jack 18.

[0026] The grounding interlocking mechanism includes a sliding bracket 7. An outer side of the sliding bracket 7 is connected with a grounding baffle 11. The grounding baffle 11 is matched with a grounding operating shaft 9. An inner side of the sliding bracket 7 is hinged to a rear end of a sliding swing rod 8. A middle part of the sliding swing rod 8 is hinged to a bracket of a grounding switch 5. A front end of the sliding swing rod 8 is matched with a rotating retaining piece 10. The sliding bracket 7 is sleeved on a positioning column 6. The positioning column 6 is arranged on a mounting bracket. The mounting bracket is arranged on the bracket of the grounding switch 5. A compression spring is arranged between a bottom of the sliding bracket 7 and the mounting bracket. The compression spring is sleeved on the positioning column 6. The sliding bracket 7 is connected with an upper part of a retaining piece connecting plate 15.

[0027] In the present utility model, when the grounding operating shaft 9 is rotated to make the grounding switch 5 in a closing state, the rotating retaining piece 10 rotates along with the grounding operating shaft 9. A convex part of the rotating retaining piece 10 rotates to a position of an interlocking swing rod 12 to jack up an upper part of the interlocking swing rod 12. In this way, the interlocking swing rod 12 rotates around a middle part thereof, and a lower end of the interlocking swing rod 12 is lifted upwards. Thus, a U-shaped lock head 13 connected to the lower end of the swing rod is also lifted upwards, and then disengages from a hook groove 16 of an interlocking hook plate. In this way, the quick insertion door 4 can be pulled outwards to open the quick insertion door 4. At the same time, an interlocking insertion piece 3 also disengages from a jack 18 of the retaining piece connecting plate 15. Thus, the compression spring releases elastic force upwards, driving the sliding bracket 7 to move upwards along the positioning column 6, thereby driving the retaining piece connecting plate 15 to move upwards. At the same time, the grounding baffle 11 also moves upwards, and then shields the grounding operating shaft 9, so that any operation on the grounding operating shaft 9 cannot be performed.

[0028] When the closing operation of the grounding switch 5 needs to be performed, the quick insertion door 4 is closed. The interlocking insertion piece 3 welded to the back of the quick insertion door 4 is inserted into the jack 18 of the retaining piece connecting plate 15. As an inclined surface 17 at the front end of the connecting insertion piece continuously enters the jack 18, the retaining piece connecting plate 15 is continuously pressed downwards. Thus, the sliding bracket 7 connected to the retaining piece connecting plate 15 also moves downwards against the elastic force of the compression spring. In this way, the grounding baffle 11 moves downwards to expose the grounding operating shaft 9. At this time, the grounding operating shaft 9 can be operated with a handle to realize the grounding opening of the grounding switch 5. After the grounding switch 5 is opened, the convex part of the rotating retaining piece 10 also rotates to the other side along with the grounding operating shaft 9. At this time, the interlocking swing rod 12 is no longer pushed by the rotating retaining piece 10 and is pulled back by a tension spring 14, so that the lower end of the interlocking swing rod 12 falls downwards. In this way, the side of the U-shaped lock head 13 just gets stuck in the hook groove 16 of the interlocking hook plate, and at this time, the quick insertion door 4 cannot be opened.

[0029] When the grounding switch 5 of the present utility model is closed, the quick insertion door 4 (without power) can be opened. When the grounding switch 5 is opened, the quick insertion door 4 cannot be opened (to prevent entering a live compartment by mistake), meeting the five-prevention requirements, with a simpler structure, more convenient operation and high safety.

[0030] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed herein, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. A new type of environmental protection gas cabinet front quick-insertion door mechanical interlocking device, characterized by: It includes a quick-insert door installed on the upper part of the cabinet body. A chain hook plate and a chain latch piece are arranged on the upper part of the inner surface of the quick-insert door. The chain hook plate is matched with the door locking mechanism. The door locking mechanism is arranged on the bracket of the earthing switch and is matched with the earthing operating shaft. The earthing operating shaft is equipped with an earthing interlocking mechanism connected thereto. The earthing interlocking mechanism is connected to the unlocking mechanism. The unlocking mechanism is matched with the chain latch piece.

2. According to claim 1, a novel environmental protection gas cabinet front quick-insertion door mechanical interlocking device is characterized in that: The door locking mechanism includes a U-shaped lock head. One side of the U-shaped lock head is matched with a hook groove opened in the upper part of the front end of the chain hook plate. The other side of the U-shaped lock head is connected to the lower end of the chain swing rod. The middle part of the chain swing rod is connected to the bracket of the earthing switch through a pin shaft. The upper end of the chain swing rod is matched with a rotating stop piece. The rotating stop piece is sleeved on the earthing operating shaft. The upper part of the chain swing rod is connected to one end of a tension spring. The other end of the tension spring is connected to the bracket of the earthing switch.

3. According to claim 2, a novel environmentally friendly gas cabinet front quick-insertion door mechanical interlocking device is characterized in that: The unlocking mechanism includes a stop piece connecting plate. The upper part of the stop piece connecting plate is connected to the earthing interlocking mechanism. A jack is opened in the lower part of the stop piece connecting plate. The chain latch piece includes a top plate. One side of the top plate is connected with a side plate. The front end of the side plate is processed with an inclined surface. The inclined surface is matched with the jack.

4. According to claim 3, a novel environmentally friendly gas cabinet front quick-insertion door mechanical interlocking device is characterized in that: The earthing interlocking mechanism includes a sliding bracket. An earthing baffle is connected to the outside of the sliding bracket. The earthing baffle is matched with the earthing operating shaft. The inner side of the sliding bracket is hinged to the rear end of a sliding swing rod. The middle part of the sliding swing rod is hinged to the bracket of the earthing switch. The front end of the sliding swing rod is matched with the rotating stop piece. The sliding bracket is sleeved on a positioning column. The positioning column is arranged on a mounting frame. The mounting frame is arranged on the bracket of the earthing switch. A compression spring is arranged between the bottom of the sliding bracket and the mounting frame. The compression spring is sleeved on the positioning column. The sliding bracket is connected to the upper part of the stop piece connecting plate.

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