Door closing operation interlocking mechanism for 35kV armored metal alternating-current switch equipment mechanism door

Abstract

The invention relates to a 35kV armored metal alternating-current switch equipment mechanism door closing operation interlocking mechanism which comprises a sliding plate vertically connected to the rear portion of an operation mechanism panel in a sliding mode and a mechanism door baffle fixedly connected to a mechanism door, the sliding plate is provided with a sliding plate hole matched with an operation shaft hole in the operation mechanism panel, and the lower end of the sliding plate is fixedly connected with an ejector rod. The lower end of the ejector rod is provided with a roller, the mechanism door baffle is provided with an inclined plane, and when the mechanism door is closed, the roller and the sliding plate are pushed to move upwards through the inclined plane of the mechanism door baffle, so that the sliding plate hole in the sliding plate is aligned with the operation shaft hole. And the disconnecting switch cannot be operated in an on state. The interlocking mechanism meets the'five-prevention 'technical requirement of electricity safety, has no intermediate switching factor, belongs to a pure mechanical interlocking mechanism, thoroughly solves the problem that a traditional switch cabinet mechanism door has no door closing operation, is simple and labor-saving in operation, and is safer in electricity utilization.

Description

Technical Field

[0001] The present invention relates to the technical field of switchgear, and in particular to a door closing operation interlocking mechanism for a 35kV armored metal AC switchgear mechanism door. Background Art

[0002] This patented technology is mainly a latest research result on the safe operation interlock mechanism of the mechanism door of the 35kV armored fixed metal AC enclosed switchgear model KGN-40.5 (hereinafter referred to as KGN-40.5 switchgear).

[0003] To ensure electrical safety, switchgear design must meet the mandatory "five protections" for electrical safety: preventing the operation of live circuit breakers, preventing live disconnect switches, preventing the closing of live earthing switches, and preventing accidental entry into live compartments. The KGN-40.5 switchgear design also needs to meet these "five protections," and with these requirements in mind, the switchgear interlocking design is crucial. The switchgear door is a primary maintenance location, and ensuring the proper and reliable interlocking between its opening and closing is crucial for the safety of operators and maintenance personnel. The existing KGN-40.5 switchgear utilizes the traditional JSXGN-35 operating panel interlocking mechanism. The door is located below the JSXGN-35 operating panel and lacks any interlocking mechanism with the panel. Operation of the operating panel is unrelated to whether the door is closed or closed. This failure to meet the "five protections" requirement for preventing accidental entry into live compartments, coupled with a missing interlocking mechanism, presents a security vulnerability. This patent aims to develop a novel door interlocking mechanism for the KGN-40.5 switchgear, addressing the shortcomings of traditional front door interlocks and providing a more robust guarantee for electrical safety. Summary of the Invention

[0004] In response to the deficiencies in the prior art, the present invention provides a 35kV armored metal AC switchgear mechanism door closing operation interlock mechanism, which mainly relies on converting the rotary opening and closing motion of the mechanism door into the up and down linear motion of the slide on the door closing interlock mechanism, and realizes the door closing operation purpose by whether the slide blocks the operating hole of the operating mechanism. Compared with the traditional switch cabinet mechanism door interlock design, the structure is more reasonable, safer and more reliable, and has broad market prospects.

[0005] The present invention is achieved through the following technical solution, which provides a 35kV armored metal AC switchgear mechanism door closing operation interlock mechanism, including a slide plate vertically slidably connected to the rear of the operating mechanism panel and a mechanism door baffle fixedly connected to the mechanism door, the slide plate is provided with a slide plate hole adapted to the operating shaft hole on the operating mechanism panel, the lower end of the slide plate is fixedly connected to a push rod, the lower end of the push rod is provided with a roller, and the mechanism door baffle is provided with an inclined surface. When the mechanism door is closed, the roller and the slide plate are pushed upward by the inclined surface of the mechanism door baffle, so that the slide plate hole on the slide plate is aligned with the operating shaft hole.

[0006] In this solution, when a power outage is required for maintenance, the mechanism door is opened, the mechanism door baffle is separated from the roller, the slide slides downward, and the slide hole on the slide is misaligned with the operating shaft hole on the operating mechanism panel. The operating handle cannot be inserted into the operating shaft hole, so that the disconnector cannot be opened or closed when the door is open, preventing the disconnector and grounding switch from being opened or closed during maintenance. When the maintenance is completed and power is restored, the mechanism door is closed. When the mechanism door is closed, the roller and slide are pushed upward by the inclined surface of the mechanism door baffle, so that the slide hole on the slide is aligned with the operating shaft hole. The operating handle can be inserted into the operating shaft hole at any time to operate the disconnector, achieving the requirements for opening and closing the disconnector when the door is closed.

[0007] As an optimization, a support plate is fixedly connected to the operating mechanism panel, and the push rod vertically passes through the support plate. The support plate in this solution is used to guide the push rod.

[0008] As an optimization, a spring for driving the push rod to move downward is provided on the push rod. The spring in this solution is used to drive the push rod and the slide plate to reset downward after the door stopper is separated from the roller, so as to achieve interlocking.

[0009] As an optimization, the spring is sleeved on the push rod, a spring pin is fixed on the push rod, and the spring is located between the spring pin and the support plate. The spring pin provided in this solution is used to realize that the elastic force of the spring is applied to the push rod.

[0010] As an optimization, the lower end of the slide is fixedly connected to the push rod by bolts, thereby realizing a detachable connection between the slide and the push rod.

[0011] As an optimization, a mounting baffle is fixed to the rear of the operating mechanism panel via fixing bolts. The slide is located between the mounting baffle and the operating mechanism panel. A retaining ring is mounted on the fixing bolt and positioned between the mounting baffle and the operating mechanism panel. The slide has a notch that fits the retaining ring. The retaining ring and the notch provide vertical sliding guidance and vertical position control for the slide.

[0012] As an optimization, the mounting baffle is a ring-shaped rectangular plate, so that the operating shaft hole can be avoided through the space in the middle.

[0013] As an optimization, the fixing bolts are provided with four, thereby achieving the guiding and limiting functions through four retaining rings.

[0014] As an optimization, the mechanism door baffle is fixed to the mechanism door by bolts, and the bolt passing hole on the mechanism door baffle is a vertical long hole. Thus, the mechanism door baffle can be installed, and the upper and lower positions of the mechanism door baffle can be adjusted through the provided long hole.

[0015] As an optimization, the slide plate hole is a round hole, so as to match the operating shaft hole.

[0016] The beneficial effects of the present invention are as follows: the door closing interlock mechanism of the present invention for 35kV armored metal AC switchgear can realize the function of operating the disconnector only when the switchgear door is closed, and cannot be operated when the switchgear door is open. It meets the technical requirements of the "five preventions" for power safety, has no intermediate switching factors, and is a purely mechanical interlock mechanism. It completely solves the problem of traditional switchgear door unrelated door operation, simple operation, labor-saving, and safer power use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of the mechanism door of the present invention in an open state; Figure 2 A side view of the mechanism door of the present invention in an open state; Figure 3 For the present invention Figure 2 Enlarged view of part A in the middle; Figure 4 A top view of the mechanism door of the present invention in an open state; Figure 5 It is a front view of the mechanism door of the present invention in a closed state; Figure 6 It is a side view of the mechanism door of the present invention in a closed state; Figure 7 A top view of the mechanism door of the present invention in a closed state; Figure 8 It is a front view of the skateboard of the present invention; Figure 9 A front view of the baffle installed in accordance with the present invention; As shown in the figure: 1. Slide plate, 2. Mounting baffle, 3. Retaining ring, 4. Fixing bolt, 5. Support plate, 6. Mechanism door baffle, 7. Push rod, 8. Roller pin, 9. Mechanism door, 10. Roller, 11. Spring pin, 12. Spring pad, 13. Spring, 14. Operating mechanism panel. DETAILED DESCRIPTION

[0018] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0019] like Figures 1 to 9 As shown, the present invention is a 35kV armored metal AC switchgear door closing operation interlock mechanism, including a slide plate 1 vertically slidably connected to the rear of the operating mechanism panel 14. The slide plate 1 is a vertical rectangular plate that fits behind the operating mechanism panel 14. In order to achieve the guidance of the slide plate 1 and the vertical upper and lower end limit, the rear of the operating mechanism panel 14 is fixed with a mounting baffle 2 by fixing bolts 4. There are four fixing bolts 4. Figure 9 As shown, the mounting baffle 2 is a circular rectangular plate. Figure 3As shown, the slide 1 is positioned between the mounting baffle 2 and the operating mechanism panel 14. The fixing bolt 4 is mounted with a retaining ring 3 positioned between the mounting baffle 2 and the operating mechanism panel 14. The slide 1 is provided with a notch that mates with the retaining ring 3. The notches are provided on both sides of the slide 1 and are vertical, elongated strips. The vertical edges of the notches mate with the retaining ring 3, guiding the slide 1 as it slides up and down. As the slide 1 moves up and down, the notches limit the slider's position.

[0020] The slide plate 1 has circular holes that mate with the operating shaft holes on the operating mechanism panel 14. The number and spacing of the holes correspond to those on the operating mechanism panel 14, and the diameter of the holes is slightly larger than that of the operating shaft holes. When the slide plate 1 moves upward, the holes align with the operating shaft holes. When the slide plate 1 moves downward, the holes are misaligned with the operating shaft holes.

[0021] The lower end of the slide plate 1 is fixed with a push rod 7, which is a vertical rod. The lower end of the slide plate 1 is fixed with the push rod 7 by bolts. The lower end of the push rod 7 is equipped with a roller 10, which is rotatably connected by a roller pin 8.

[0022] The operating mechanism panel 14 is fixedly connected to the support plate 5, through which the push rod 7 extends vertically. Furthermore, a spring 13 is mounted on the push rod 7 to drive the push rod 7 downward. Specifically, the spring 13 is sleeved around the push rod 7, which is fixedly connected to a spring pin 11. The spring 13 is located between the spring pin 11 and the support plate 5.

[0023] It also includes a mechanism door baffle 6 fixed to the mechanism door 9, which is fixed to the mechanism door 9 by bolts, and the bolt passing hole on the mechanism door baffle 6 is a vertical long hole, thereby realizing the installation of the mechanism door baffle. At the same time, the upper and lower positions of the mechanism door baffle can be adjusted through the set long hole.

[0024] The mechanism door baffle 6 is provided with an inclined surface, and the upper end of the inclined surface is provided with a horizontal surface. When the mechanism door 9 is closed, the inclined surface of the mechanism door baffle 6 pushes the roller 10 and the slide 1 upward to align the slide hole on the slide 1 with the operating shaft hole.

[0025] The method of using the present invention: like Figure 1-4 As shown, during a power outage for maintenance, the mechanism door 9 is opened, the mechanism door baffle 6 is separated from the roller 10, and the slide 1 slides downward under the action of its own weight and the elastic force of the spring 13. The slide 1 is restricted by the notch and the retaining ring 3 on the slide 1, and the slide 1 moves down to the low point and stops. The slide hole on the slide 1 is misaligned with the operating shaft hole on the operating mechanism panel 14, and the operating handle cannot be inserted into the operating shaft hole, so that the disconnector cannot be opened or closed in the door open state, thereby preventing the disconnector and the grounding switch from being opened or closed by mistake in the maintenance state.

[0026] When the maintenance is completed and the power is supplied, if Figure 5-7 As shown, after the inspection is completed, the personnel are evacuated and the mechanism door 9 is closed. During the closing process, the mechanism door baffle 6 is driven to rotate inward. After the mechanism door baffle 6 contacts the roller 10, the roller 10 moves upward along the inclined surface under the thrust of the inclined surface on the mechanism door baffle 6, driving the slide plate 1 to move upward. When the mechanism door 9 is completely closed, the roller 10 moves to the horizontal surface of the mechanism door baffle 6, relying on the plane to block the roller 10 from sliding down, preventing the slide plate 1 from falling. In the closed state, the slide plate 1 moves up, and the slide plate hole on the slide plate 1 coincides with the operating shaft hole on the operating mechanism panel 14. The operating handle can be inserted into the operating shaft hole at any time to operate the opening and closing isolating switch, thereby realizing the operation requirements of the opening and closing isolating switch in the closed state.

[0027] Of course, the above description is not limited to the above examples. Technical features not described in the present invention can be achieved by or by adopting existing technologies, which will not be described here. The above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not depart from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A 35kV armored metal AC switchgear door closing operation interlock mechanism, characterized by: The invention comprises a slide plate (1) vertically slidably connected to the rear of the operating mechanism panel (14) and a mechanism door baffle (6) fixed to the mechanism door (9), wherein the slide plate (1) is provided with a slide plate hole adapted to the operating shaft hole on the operating mechanism panel (14), a top rod (7) is fixedly connected to the lower end of the slide plate (1), and a roller (10) is installed at the lower end of the top rod (7), and an inclined surface is provided on the mechanism door baffle (6). When the mechanism door (9) is closed, the roller (10) and the slide plate (1) are pushed upward by the inclined surface of the mechanism door baffle (6), so that the slide plate hole on the slide plate (1) is aligned with the operating shaft hole.

2. The 35kV armored metal AC switchgear door closing operation interlock mechanism according to claim 1, characterized in that: A support plate (5) is fixedly connected to the operating mechanism panel (14), and the push rod (7) vertically passes through the support plate (5).

3. The 35kV armored metal AC switchgear door closing operation interlock mechanism according to claim 2, characterized in that: The push rod (7) is provided with a spring (13) for driving the push rod (7) to move downward.

4. The 35kV armored metal AC switchgear door closing operation interlock mechanism according to claim 3, characterized in that: The spring (13) is sleeved on the push rod (7), a spring pin (11) is fixedly connected to the push rod (7), and the spring (13) is located between the spring pin (11) and the support plate (5).

5. The 35kV armored metal AC switchgear door closing operation interlock mechanism according to claim 1, characterized in that: The lower end of the slide plate (1) is fixedly connected to the push rod (7) via bolts.

6. The 35kV armored metal AC switchgear door closing operation interlock mechanism according to claim 1, characterized in that: A mounting baffle (2) is fixedly connected to the rear of the operating mechanism panel (14) via a fixing bolt (4); a slide plate (1) is located between the mounting baffle (2) and the operating mechanism panel (14); a retaining ring (3) is mounted on the fixing bolt (4) and is located between the mounting baffle (2) and the operating mechanism panel (14); and a notch is provided on the slide plate (1) to match the retaining ring (3).

7. The 35kV armored metal AC switchgear door closing operation interlock mechanism according to claim 6, characterized in that: The mounting baffle (2) is an annular rectangular plate.

8. The door closing operation interlock mechanism of a 35kV armored metal AC switchgear according to claim 6, characterized in that: There are four fixing bolts (4).

9. The 35kV armored metal AC switchgear door closing operation interlock mechanism according to claim 1, characterized in that: The mechanism door baffle (6) is fixedly connected to the mechanism door (9) via bolts, and the bolt penetration hole on the mechanism door baffle (6) is a vertical long hole.

10. The 35kV armored metal AC switchgear door closing operation interlock mechanism according to claim 1, characterized in that: The slide plate hole is a round hole.

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