An integrated interlocking system for 35KV switch cabinet trolley and grounding switch

Abstract

The present invention relates to the technical field of self-locking switches, and provides a method for integrating interlocking a 35KV switch cabinet trolley and a grounding switch, comprising a trolley part and a grounding interlocking part, wherein the trolley part comprises a trolley positioning mechanism, wherein the trolley positioning mechanism comprises a trolley positioning pin and a grounding interlocking plate slidably mounted on a baffle, wherein the trolley positioning pin and the grounding interlocking plate are connected via a grounding interlocking plate reset spring, and a grounding interlocking plate lever is further provided on the baffle; the grounding interlocking part comprises a cabinet body arranged on one side of the trolley positioning mechanism, wherein an axle seat is vertically mounted on the cabinet body, and an interlocking assembly is mounted at the bottom of the axle seat; the grounding interlocking plate is manually unlocked and automatically unlocked, so that personnel do not have to go to the site, and can perform substation switching operations remotely, truly realizing "one-piece smooth control", thereby reducing the pressure on power grid operation and maintenance personnel, improving work efficiency, and improving the safety of substation switching operations.

Description

Technical Field

[0001] The invention relates to the technical field of self-locking switches, and in particular to an integrated interlocking system that meets the requirements of a 35KV switch cabinet trolley and a grounding switch. Background Art

[0002] With the continuous advancement of power grid construction, the number of substations is increasing. Most substations are far away from towns and the roads are not smooth. Therefore, the workload of operation and maintenance personnel has increased sharply, especially the high safety risk and large workload of substation switching operation. In order to reduce the pressure of power grid operation and maintenance personnel, improve work efficiency and improve the safety of substation switching operation, researchers have developed a switching "one-piece sequential control" system, which uses software and hardware technology to realize the automatic execution of substation switching operation procedures, and operation and maintenance personnel only perform auxiliary confirmation. The most important point for the smooth execution of the "one-piece sequential control" system program is: the integrated interlocking of the trolley and the grounding switch, that is, when the electric operation of the trolley and the electric operation of the grounding switch are switched to each other, the interlocking between them can be automated, and no one is required to operate the interlocking on site. The 10kV switchgear, trolleys, and grounding interlocks of various manufacturers are basically the same, with a high degree of standardization and early development, so the trolleys and grounding switches have achieved integrated interlocking; however, the 35kV switchgear trolley styles of various manufacturers are different, and the grounding interlocks are different. Due to structural limitations, the interlocks are not automated. When the electric operation of the trolley and the electric operation of the grounding switch are switched between each other, someone is required to operate the interlock on site.

[0003] Currently on the market, the grounding switch interlocking plate on the right side of the trolley, whether it is a lever style or a knob style, is not automated. Someone needs to operate the interlock on site to realize the switching between the electric operation of the trolley and the electric operation of the grounding switch. Therefore, the manual operation interlocking needs to be changed to an automated interlocking.

[0004] There are trolley positioning pins around the grounding interlocking piece on the right side of the trolley positioning mechanism. The positions and quantities of the grounding interlocking pieces and trolley positioning pins of each manufacturer are different. When interlocking the grounding interlocking piece, the trolley positioning pins need to be avoided. The interlocking design of the grounding switch during manual operation is more complicated and difficult, with poor versatility, and the integrated interlocking design is even more difficult. Therefore, versatility and applicability need to be considered.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0006] In view of the above-mentioned defects, the object of the present invention is to provide a KV switch cabinet trolley and grounding switch integrated interlocking which has a simple structure and can realize self-reset.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A 35KV switch cabinet trolley and grounding switch integrated interlocking device comprises a trolley part and a grounding interlocking part, the trolley part comprises a trolley positioning mechanism, the trolley positioning mechanism comprises a trolley positioning pin and a grounding interlocking plate slidably mounted on a baffle, the trolley positioning pin and the grounding interlocking plate are connected by a grounding interlocking plate reset spring, and a grounding interlocking plate lever is also provided on the baffle; the grounding interlocking part comprises a cabinet body arranged on one side of the trolley positioning mechanism, an axle seat is vertically mounted on the cabinet body, a slide plate is slidably mounted inside the axle seat, an electromagnet mounting plate is mounted at a position below the slide plate inside the axle seat, an electromagnet is arranged on the electromagnet mounting plate, a fixed grounding slide plate guide shaft is fixedly connected to the lower end of the axle seat, a grounding slide plate guide shaft is connected to the upper side of the fixed grounding slide plate guide shaft by a grounding slide plate compression spring, and an interlocking assembly is mounted on the grounding slide plate guide shaft.

[0009] The following is a further optimization of the above technical solution by the present invention:

[0010] A guide shaft is arranged inside the grounding slide plate compression spring to prevent the grounding slide plate compression spring from bending.

[0011] Further: the interlocking assembly includes a transversely arranged interlocking push plate mounting plate, an interlocking rotating plate is provided on the interlocking push plate mounting plate, an interlocking push plate that can move back and forth laterally is provided at a position between the interlocking push plate mounting plate and the interlocking rotating plate, and the interlocking push plate mounting plate is installed on the grounding slide guide shaft through an interlocking fixing plate.

[0012] Furthermore: the grounding interlocking plate is always in an extended state under the action of a grounding interlocking plate return spring.

[0013] Furthermore: the interlocking assembly can move reciprocatingly up and down in the shaft seat.

[0014] The present invention adopts the above technical scheme with ingenious design. When the trolley is in the test position and the grounding switch is closed, the slide plate moves downward. At this time, the downward pressure of the slide plate drives the interlocking rotating plate to rotate clockwise, and at the same time drives the interlocking push plate to move to the left, thereby pushing the grounding interlocking plate to move to the left together, and it remains in place. At this time, the trolley is locked when it is shaken in and out, and the trolley cannot be moved from the test position to the working position, that is, the five-protection interlock: preventing power from being supplied with the grounding wire; (if there is no such lock, someone must be in the local position to manually turn or rotate the grounding interlocking plate lever to the left before the grounding switch can be closed).

[0015] When the trolley is in the test position and the grounding switch is open, the slide plate moves upward. At this time, the upward movement of the slide plate drives the interlocking rotating plate to rotate counterclockwise, and at the same time drives the interlocking push plate to move to the right. After the action is completed, the grounding interlocking plate pops out to the left under the action of the grounding interlocking plate reset spring. At this time, the trolley's rocking-in and rocking-out positions are unlocked, and the trolley can be moved from the test position to the working position, that is, the five-protection interlock: prevent the live grounding wire from being hung; (If there is no such interlock, someone must be in the local position, separate the grounding switch, and manually turn or rotate the grounding interlocking plate lever to the right to unlock the trolley's rocking-in and rocking-out positions, and the trolley can be moved from the test position to the working position).

[0016] To sum up, the manual unlocking of the grounding interlocking plate is changed to automatic unlocking of the grounding interlocking plate. Personnel do not have to go to the site and can perform substation switching operations remotely, truly realizing "one-stop control", thereby reducing the pressure on power grid operation and maintenance personnel, improving work efficiency, and improving the safety of substation switching operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 It is a side view of the cabinet in the present invention;

[0019] Figure 3 It is a structural schematic diagram of the interlocking assembly in the present invention;

[0020] Figure 4 It is a schematic diagram of the working state of the present invention;

[0021] Figure 5 It is a side view of the working state of the cabinet in the present invention. DETAILED DESCRIPTION

[0022] Example: Figure 1-5As shown, a 35KV switch cabinet trolley and grounding switch integrated interlocking comprises a trolley part and a grounding interlocking part, wherein the trolley part comprises a trolley positioning mechanism 2, wherein the trolley positioning mechanism 2 comprises a trolley positioning pin 3 and a grounding interlocking plate 5 slidably mounted on a baffle 18, wherein the trolley positioning pin 3 and the grounding interlocking plate 5 are connected via a grounding interlocking plate reset spring 6, and a grounding interlocking plate lever 4 is further provided on the baffle 18; wherein the grounding interlocking part comprises a cabinet body 1 arranged on one side of the trolley positioning mechanism 2, wherein an axle seat 7 is vertically mounted on the cabinet body 1, wherein a slide plate 8 is slidably mounted inside the axle seat 7, wherein an electromagnet mounting plate 9 is mounted at a position below the slide plate 8 inside the axle seat 7, wherein an electromagnet 10 is provided on the electromagnet mounting plate 9, wherein a fixed grounding slide plate guide shaft 11 is fixedly connected to the lower end of the axle seat 7, wherein a grounding slide plate guide shaft 13 is connected to the upper side of the fixed grounding slide plate guide shaft 11 via a grounding slide plate compression spring 12, and an interlocking assembly is mounted on the grounding slide plate guide shaft 13.

[0023] A guide shaft is provided inside the grounding slide plate compression spring 12 to prevent the grounding slide plate compression spring 12 from bending.

[0024] The interlocking assembly includes a transversely arranged interlocking push plate mounting plate 16, on which an interlocking rotating plate 14 is provided, and an interlocking push plate 15 which can move back and forth transversely is provided between the interlocking push plate mounting plate 16 and the interlocking rotating plate 14, and the interlocking push plate mounting plate 16 is installed on the grounding slide guide shaft 13 through an interlocking fixing plate 17.

[0025] The grounding interlocking piece 5 is always in an extended state under the action of the grounding interlocking piece return spring 6 .

[0026] The interlocking assembly can reciprocate up and down in the shaft seat 7.

[0027] When the trolley is in the test position and the earthing switch is closed, the slide plate 8 moves downward. At this time, the slide plate 8 is pressed down to drive the interlocking rotating plate 14 to rotate clockwise, and at the same time drives the interlocking push plate 15 to move to the left, thereby pushing the grounding interlocking plate 5 to move to the left together, and it remains in place. At this time, the trolley 2 is locked when it is shaken in and out, and the trolley cannot move from the test position to the working position, that is, the five-protection interlock: preventing power from being supplied with a grounding wire; (if there is no such lock, someone must be in the local position to manually turn or rotate the grounding interlocking plate lever 4 to the left before the grounding switch can be closed).

[0028] When the trolley is in the test position and the grounding switch is open, the slide plate 8 moves upward. At this time, the slide plate 8 is lifted up to drive the interlocking rotating plate 14 to rotate counterclockwise, and at the same time drives the interlocking push plate 15 to move to the right. After the action is completed, the grounding interlocking plate 5 pops out to the left under the action of the grounding interlocking plate reset spring 6. At this time, the trolley's rocking-in and rocking-out positions are unlocked, and the trolley can be moved from the test position to the working position, that is, the five-protection interlock: prevent the grounding wire from being hung with power; (if there is no such lock, someone must be in the local position, separate the grounding switch, and manually turn or rotate the grounding interlocking plate lever 4 to the right to unlock the trolley's rocking-in and rocking-out positions, and the trolley can be moved from the test position to the working position).

[0029] To sum up, the manual unlocking of the grounding interlocking plate 5 is changed to automatic unlocking of the grounding interlocking plate 5. Personnel do not have to go to the site, and can perform substation switching operations remotely, truly realizing "one-stop control", thereby reducing the pressure on power grid operation and maintenance personnel, improving work efficiency, and improving the safety of substation switching operations.

[0030] In the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0031] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be a connection between the two components. The terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" and "third" may explicitly or implicitly include one or more of the features. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0032] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An integrated interlocking system for a 35KV switch cabinet trolley and a grounding switch, comprising a trolley part and a grounding interlocking part, characterized in that: The trolley part comprises a trolley positioning mechanism (2), the trolley positioning mechanism (2) comprises a trolley positioning pin (3) and a grounding interlocking plate (5) slidably mounted on a baffle (18), the trolley positioning pin (3) and the grounding interlocking plate (5) are connected via a grounding interlocking plate reset spring (6), and a grounding interlocking plate lever (4) is also provided on the baffle (18); the grounding interlocking part comprises a cabinet (1) arranged on one side of the trolley positioning mechanism (2), and an axle seat (7) is vertically mounted on the cabinet (1) A slide plate (8) is slidably arranged inside the shaft seat (7), an electromagnet mounting plate (9) is installed at a position below the slide plate (8) inside the shaft seat (7), an electromagnet (10) is arranged on the electromagnet mounting plate (9), a fixed grounding slide plate guide shaft (11) is fixedly connected to the lower end of the shaft seat (7), a grounding slide plate guide shaft (13) is connected to the upper part of the fixed grounding slide plate guide shaft (11) via a grounding slide plate compression spring (12), and an interlocking assembly is installed on the grounding slide plate guide shaft (13); The interlocking assembly comprises a transversely arranged interlocking push plate mounting plate (16), an interlocking rotating plate (14) is arranged on the interlocking push plate mounting plate (16), an interlocking push plate (15) which can reciprocate transversely is arranged at a position between the interlocking push plate mounting plate (16) and the interlocking rotating plate (14), and the interlocking push plate mounting plate (16) is mounted on the grounding slide guide shaft (13) through an interlocking fixing plate (17).

2. The integrated interlocking system for a 35KV switch cabinet trolley and a grounding switch according to claim 1 is characterized in that: A guide shaft is provided inside the grounding slide plate compression spring (12) to prevent the grounding slide plate compression spring (12) from bending.

3. The integrated interlocking system for a 35KV switch cabinet trolley and a grounding switch according to claim 1 is characterized in that: The grounding interlocking plate (5) is always in an extended state under the action of the grounding interlocking plate return spring (6).

4. The integrated interlocking system for a 35KV switch cabinet trolley and a grounding switch according to claim 1 is characterized in that: The interlocking assembly can reciprocate up and down in the shaft seat (7).

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