Anti-misoperation mechanical and electrical interlocking structure for grounding switch of medium-voltage power distribution switch cabinet

Abstract

The utility model relates to an anti-misoperation mechanical and electrical interlocking structure for a grounding switch of a medium-voltage power distribution switch cabinet, which comprises a first grounding knife padlock static baffle plate arranged on the outer side surface of a middle partition plate, and a grounding knife padlock movable baffle plate connected in the first grounding knife padlock static baffle plate in a sliding manner and used for shielding an operation hole, and the middle partition plate is also provided with a spring for driving the movable baffle plate of the grounding knife padlock to slide, the middle partition plate is internally provided with a telescopic electromagnet positioned on a secondary electrical loop, and the extension end of the electromagnet extends and is inserted into the sliding hole to limit the sliding of the movable baffle plate of the grounding knife padlock. When the grounding knife padlock is used, the closing of the external locking condition introduction switch arranged on the secondary electrical loop is determined by whether the external locking condition meets the relation, so that the stretching of the stretching end of the magnet is determined, the operation hole is shielded by the movable baffle plate of the grounding knife padlock, and when the external locking condition is met, the stretching end of the magnet is stretched out and drawn back. Therefore, the movable baffle plate of the grounding knife padlock does not shield the operation hole, so that a corresponding medium-voltage power distribution switch cabinet is operated, and misoperation is further prevented.

Description

Technical Field

[0001] The utility model relates to the field of power distribution switch cabinets, in particular to the technical field of grounding switches for power distribution switch cabinets, and specifically refers to a mechanical and electrical interlocking structure for preventing misoperation of a grounding switch for a medium-voltage power distribution switch cabinet. Background Art

[0002] At present, medium voltage distribution switchgear is mainly used for power plants, power transmission of small and medium-sized generators, power distribution of industrial and mining enterprises, and power receiving and transmission of secondary substations of power systems, and starting of large high-voltage motors, etc., to achieve control, protection and detection. Due to its superior product performance, perfect five-protection interlocking function, and easy operation and maintenance, it is widely used in power systems.

[0003] The medium-voltage distribution switchgear itself not only meets the requirements of national standards, but also has interlocking functions to prevent the push-pull of circuit breaker trolleys under load, prevent the circuit breaker from being opened or closed by mistake, prevent the grounding switch from closing the circuit breaker in the closed position, prevent the accidental entry into the energized compartment, and prevent the accidental closing of the grounding switch when energized. In order to further improve the personal safety of power transmission and distribution operation and maintenance personnel, some owners have put forward higher requirements for preventing misoperation of medium-voltage distribution switchgear: the corresponding medium-voltage distribution switchgear can only be operated when the external locking conditions are met, that is, preventing misoperation through the step-by-step workflow. The existing medium-voltage distribution switchgear can meet the necessary interlocking requirements by itself, but cannot meet the requirements for misoperation through external interlocking. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a mechanical and electrical interlocking structure for preventing misoperation of a grounding switch of a medium-voltage power distribution switch cabinet, so that a movable baffle plate of a grounding knife padlock blocks an operating hole, and when an external locking condition is met, the movable baffle plate of the grounding knife padlock no longer blocks the operating hole, so that the corresponding medium-voltage power distribution switch cabinet can be operated, thereby further preventing misoperation.

[0005] The utility model is realized through the following technical scheme: a mechanical and electrical interlocking structure for preventing misoperation of a grounding switch in a medium-voltage power distribution switch cabinet, comprising a first grounding knife padlock static baffle plate arranged on the outer side of a middle partition plate, a grounding knife padlock dynamic baffle plate slidably connected in the first grounding knife padlock static baffle plate and shielding an operation hole, the middle partition plate is also provided with a spring for driving the grounding knife padlock dynamic baffle plate to slide, the middle partition plate is provided with a telescopic electromagnet located on a secondary electrical circuit, and the protruding end of the electromagnet extends and is inserted into the sliding hole to limit the sliding of the grounding knife padlock dynamic baffle plate.

[0006] When the utility model is in use, whether the external locking condition is satisfied determines the closing of the switch for introducing the external locking condition on the secondary electrical circuit, thereby determining the extension and retraction of the extended end of the magnet. When the extended end of the electromagnet is extended, the sliding of the movable baffle of the ground knife padlock is restricted. At this time, the spring drives the movable baffle of the knife padlock to push onto the extended end of the electromagnet. At this time, the movable baffle of the knife padlock blocks the operating hole, so the operating handle cannot be inserted into the operating hole for operation.

[0007] When the extended end of the electromagnet contracts, the spring drives the knife padlock movable baffle to slide away from the operating hole, thereby removing the obstruction of the operating hole, thereby allowing the operating handle to be inserted into the operating hole for operation;

[0008] By making the movable baffle of the ground switch padlock cover the operating hole, and when the external locking conditions are met, the movable baffle of the ground switch padlock no longer covers the operating hole, so that the corresponding medium-voltage distribution switch cabinet can be operated, thereby further preventing misoperation.

[0009] Preferably, a sliding hole for sliding the movable baffle of the ground knife padlock is provided on the static baffle of the first ground knife padlock, and the operating handle passes through the sliding hole and is inserted into the operating hole.

[0010] In this preferred solution, the sliding hole is provided so that the first static baffle of the knife padlock covers the operating hole, and the setting of the sliding hole also provides a guiding effect for the dynamic baffle of the knife padlock.

[0011] Preferably, the middle partition is further provided with a second padlock static baffle, the second padlock static baffle is provided with a second through hole for the operating handle to pass through, and the extended end of the electromagnet extends out to the top of the second padlock static baffle.

[0012] When the preferred solution is in use, the second padlock static baffle is arranged to form a guide channel for the knife padlock movable baffle to slide between the second padlock static baffle and the middle partition, thereby limiting the knife padlock movable baffle from deviating inward or outward.

[0013] Preferably, the spring is located in a middle partition, a long hole is provided on the middle partition, and the connecting end of the movable baffle of the ground knife padlock passes through the long hole and is connected to the spring.

[0014] In this preferred solution, the long hole and the spring are arranged so that the spring is located in the middle partition, thereby playing a role in protecting the spring.

[0015] Preferably, the first ground knife padlock static baffle and the second ground knife padlock static baffle are both provided with fixing holes connected to the trolley positioning hole on the middle partition, and the trolley passes through the two fixing holes in sequence and is inserted into the positioning hole.

[0016] In this preferred solution, the installation positions of the first ground knife padlock static baffle and the second ground knife padlock static baffle are fixed by the positions of the positioning holes, and the positioning holes are arranged on the positioning plate, and the positioning plate is installed on the middle partition by rivets. Therefore, when installing the positioning plate, the first ground knife padlock static baffle and the second ground knife padlock static baffle are fixed to the middle partition by common rivets.

[0017] Preferably, the sliding hole includes a first perforation opposite to the second perforation, a fourth perforation opposite to the long hole, and a third perforation located between the first perforation and the fourth perforation, the protruding end of the telescopic electromagnet is inserted into the third perforation, and the movable baffle of the ground knife padlock is slidably connected in the third perforation.

[0018] This preferred solution realizes the connection between the movable baffle plate of the ground knife padlock and the spring, the sliding connection of the movable baffle plate of the ground knife padlock in the sliding hole, and the shielding of the operating hole by the movable baffle plate of the ground knife padlock through the cooperation of the first perforation, the third perforation, and the fourth perforation.

[0019] Preferably, a second side plate extending outwardly to the outside of the second perforation is provided on the movable baffle plate of the ground knife padlock, and a limit plate for limiting the outward sliding of the second side plate is provided on both the first and second static baffle plates of the ground knife padlock.

[0020] In this preferred solution, the sliding range of the second side plate is limited by the limiting plate and the side of the second through hole away from the limiting plate, that is, the sliding distance of the movable baffle of the ground knife padlock is limited.

[0021] The beneficial effects of the utility model are as follows: whether the external locking condition is satisfied determines the closing of the switch introduced by the external locking condition on the secondary electrical circuit, thereby determining the extension and retraction of the protruding end of the magnet. When the protruding end of the electromagnet is extended, the sliding of the movable baffle of the ground knife padlock is restricted. At this time, the spring drives the movable baffle of the knife padlock to push onto the protruding end of the electromagnet, and at this time, the movable baffle of the ground knife padlock blocks the operating hole, so the operating handle cannot be inserted into the operating hole for operation; and when the protruding end of the electromagnet contracts, the spring drives the movable baffle of the knife padlock to slide in a direction away from the operating hole, thereby releasing the obstruction of the operating hole, thereby allowing the operating handle to be inserted into the operating hole for operation; by making the movable baffle of the ground knife padlock block the operating hole, and when the external locking condition is met, the movable baffle of the ground knife padlock no longer blocks the operating hole, so that the corresponding medium-voltage distribution switch cabinet can be operated, thereby further preventing misoperation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0023] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;

[0024] Figure 3for Figure 1 Schematic diagram after removing the static baffle of the second ground knife padlock;

[0025] Figure 4 It is a partial front view schematic diagram of the middle partition;

[0026] Figure 5 for Figure 3 The schematic diagram of the main view of the middle ground knife padlock after the movable baffle slides;

[0027] Figure 6 It is a schematic top view of the structure of the utility model;

[0028] Figure 7 for Figure 3 A top view of the ground knife padlock after the movable baffle slides;

[0029] Figure 8 It is an explosion diagram of the first ground knife padlock static baffle, the second ground knife padlock static baffle, and the ground knife padlock dynamic baffle;

[0030] As shown in the figure:

[0031] 1. Left side plate, 2. Right side plate, 3. Middle partition plate, 4. Static baffle plate for second ground knife padlock, 5. Dynamic baffle plate for ground knife padlock, 6. Static baffle plate for first ground knife padlock, 7. Fixing hole, 8. Operating hole, 9. Electromagnet, 10. Long hole, 11. First through hole, 12. Second through hole, 13. Third through hole, 14. Fourth through hole, 15. Positioning hole, 16. Limit plate, 17. Spring, 18. Second side plate. DETAILED DESCRIPTION

[0032] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0033] Refer to the attached Figure 1-8 The utility model discloses a mechanical and electrical interlocking structure for preventing misoperation of a grounding switch in a medium-voltage power distribution switch cabinet. The switch cabinet body comprises a left side plate 1, a right side plate 2, and a middle partition plate 3 connecting the left side plate 1 and the right side plate 2. An operating hole 8 is opened on the right side plate 2, and an operating handle is inserted into the operating hole 8 for operation.

[0034] A positioning plate is provided on the middle partition plate 3 , and a positioning hole 15 for positioning the turnover vehicle is opened on the positioning plate. The positioning plate is mounted on the middle partition plate 3 by rivets.

[0035] The mechanical and electrical interlocking structure for preventing misoperation of the grounding switch of the medium-voltage distribution switch cabinet includes a first ground knife padlock static baffle 6 and a second ground knife padlock static baffle 4 covering the operation hole 8. The first ground knife padlock static baffle 6 and the second ground knife padlock static baffle 4 are provided with a fixing hole 7 connected to the positioning hole 15, that is, the first ground knife padlock static baffle 6 and the second ground knife padlock static baffle 4 are installed and positioned through the positioning hole 15, and the turnover vehicle passes through the two fixing holes 7 in sequence and is inserted into the positioning hole 15. The positioning plate, the first ground knife padlock static baffle 6 and the second ground knife padlock static baffle 4 share a common rivet and are installed on the middle partition 3.

[0036] The first ground knife padlock static baffle 6 is located between the second ground knife padlock static baffle 4 and the middle partition 3. The first ground knife padlock static baffle 6 is provided with a sliding hole that penetrates the first ground knife padlock static baffle 6. The sliding hole includes a fourth through hole 14, a first through hole 11 opposite to the operating hole 8, and a third through hole 13 located between the first through hole 11 and the fourth through hole 14. The second ground knife padlock static baffle 4 is provided with a second through hole 12 that is arranged opposite to the first through hole 11. The operating handle penetrates the second through hole 12 and the first through hole 11 in sequence and is inserted into the operating hole 8.

[0037] A ground knife padlock movable baffle 5 is slidably connected in the third through hole 13, and one end of the ground knife padlock movable baffle 5 away from the operating hole 8 is slidably connected in the fourth through hole. A guide channel for limiting the ground knife padlock movable baffle 5 from falling outward is formed between the second ground knife padlock static baffle 4 and the middle partition plate 3, and the third through hole 13 limits the ground knife padlock movable baffle 5 from moving up and down.

[0038] The ground knife padlock movable baffle 5 is provided with a second side plate 18 extending outward to the outside of the second through hole 12, and the first ground knife padlock static baffle 6 and the second ground knife padlock static baffle 4 are both provided with a limit plate 16 for limiting the second side plate 18 from sliding outward.

[0039] One end of the movable baffle plate 5 of the ground knife padlock away from the operating hole 8 extends inwardly to the inner side of the middle partition plate 3. A spring 17 is provided on the inner side of the middle partition plate 3. The spring 17 extends along the extension direction of the sliding hole. One end of the spring 17 is connected to the middle partition plate 3, and the other end is connected to the movable baffle plate 5 of the ground knife padlock. The spring 17 drives the movable baffle plate 5 of the ground knife padlock to move in the direction away from the operating hole 8. A long hole 10 is provided on the middle partition plate 3 for sliding one end of the movable baffle plate 5 of the ground knife padlock away from the operating hole 8, and the long hole 10 is opposite to the fourth through hole 14.

[0040] A mounting plate is also provided on the inner side of the middle partition 3, on which a telescopic electromagnet 9 located on the secondary electrical circuit is provided. The protruding end of the electromagnet 9 extends outward through the middle partition 3 and is inserted into the third through-hole 13, and is pushed onto the second ground knife padlock static baffle 4. The ground knife padlock dynamic baffle 5 is pulled by the spring 17 and is pushed onto the protruding end of the electromagnet 9. An external locking condition introduction switch is provided on the secondary electrical circuit.

[0041] When the utility model is in use, whether the external locking condition is satisfied determines the closing of the switch for introducing the external locking condition on the secondary electrical circuit, thereby determining the extension and retraction of the extended end of the magnet;

[0042] When the external locking condition is not met, the external locking condition introduction switch is not closed, and the secondary electrical circuit is not connected. At this time, the extended end of the electromagnet 9 extends, and the blocking spring 17 drives the ground knife padlock movable baffle 5 to move away from the operating hole 8, so that the ground knife padlock movable baffle 5 blocks the operating hole 8, and the operating handle cannot be inserted into the operating hole 8;

[0043] When the external locking condition is met, the external locking condition introduces the switch closure, and the secondary electrical circuit is connected. At this time, the protruding end of the electromagnet 9 contracts, and the spring 17 drives the ground knife padlock movable baffle 5 to move away from the operating hole 8, so that the ground knife padlock movable baffle 5 will not block the operating hole 8, so that the operating hole 8 leaks out. At this time, the operating handle passes through the second through hole 12 and the first through hole 11 once and is inserted into the operating hole 8.

[0044] By making the ground switch padlock movable baffle 5 block the operating hole 8, and when the external locking condition is met, the ground switch padlock movable baffle 5 no longer blocks the operating hole 8, so that the corresponding medium-voltage distribution switch cabinet can be operated, thereby further preventing misoperation.

[0045] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme 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 the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate 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 mechanical and electrical interlocking structure for preventing misoperation of a grounding switch in a medium voltage distribution switch cabinet, characterized in that: The invention comprises a first ground knife padlock static baffle (6) arranged on the outer side of a middle partition (3), a ground knife padlock dynamic baffle (5) slidably connected in the first ground knife padlock static baffle (6) and shielding an operating hole (8), the middle partition (3) is also provided with a spring (17) for driving the ground knife padlock dynamic baffle (5) to slide, and a telescopic electromagnet (9) located on a secondary electrical circuit is provided in the middle partition (3), and the protruding end of the electromagnet (9) extends and is inserted into the sliding hole to limit the sliding of the ground knife padlock dynamic baffle (5).

2. The mechanical and electrical interlocking structure for preventing misoperation of the grounding switch of the medium voltage distribution switch cabinet according to claim 1 is characterized in that: The first ground knife padlock static baffle (6) is provided with a sliding hole for the ground knife padlock dynamic baffle (5) to slide, and the operating handle passes through the sliding hole and is inserted into the operating hole (8).

3. The mechanical and electrical interlocking structure for preventing misoperation of the grounding switch of the medium voltage distribution switch cabinet according to claim 2 is characterized in that: A second padlock static baffle is also provided on the middle partition (3), and a second through hole (12) for the operating handle to pass through is opened on the second padlock static baffle. The extended end of the electromagnet (9) extends out to the top of the second padlock static baffle.

4. The mechanical and electrical interlocking structure for preventing misoperation of the grounding switch of the medium voltage distribution switch cabinet according to claim 3 is characterized in that: The spring (17) is located in the middle partition (3), and a long hole (10) is opened on the middle partition (3). The connection end of the ground knife padlock movable baffle (5) passes through the long hole (10) and is connected to the spring (17).

5. The mechanical and electrical interlocking structure for preventing misoperation of the grounding switch of the medium voltage distribution switch cabinet according to claim 3 is characterized in that: The first ground knife padlock static baffle plate (6) and the second ground knife padlock static baffle plate (4) are both provided with fixing holes (7) which are connected to the trolley positioning hole (15) on the middle partition plate (3); the trolley passes through the two fixing holes (7) in sequence and is then inserted into the positioning hole (15).

6. The mechanical and electrical interlocking structure for preventing misoperation of the grounding switch of the medium voltage distribution switch cabinet according to claim 4 is characterized in that: The sliding hole comprises a first through hole (11) facing the second through hole (12), a fourth through hole (14) facing the long hole (10), and a third through hole (13) located between the first through hole (11) and the fourth through hole (14); the extended end of the telescopic electromagnet (9) is inserted into the third through hole (13), and the ground knife padlock movable baffle (5) is slidably connected in the third through hole (13).

7. The mechanical and electrical interlocking structure for preventing misoperation of the grounding switch of the medium voltage distribution switch cabinet according to claim 3 is characterized in that: The ground knife padlock movable baffle (5) is provided with a second side plate (18) extending outward to the outside of the second through hole (12), and the first ground knife padlock static baffle (6) and the second ground knife padlock static baffle (4) are both provided with a limit plate (16) for limiting the second side plate (18) from sliding outward.

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