A method for carrying out live disconnection of a substation with an insulated hard ladder

Abstract

The application relates to the technical field of power distribution networks, in particular to a method for carrying out live disconnection of a substation lead by adopting an insulating hard ladder, which comprises an insulating hard ladder connecting device and a tipping bucket pulley device, the insulating hard ladder connecting device comprises an insulating hard ladder body, a connecting rod and a self-locking hook, and the specific method is as follows: the insulating rope of the pulley II is connected to the self-locking hook of the tipping bucket pulley device, the spring I is stretched by the self-gravity of the insulating hard ladder body or the insulating rope is pulled downwards to drive the turnover shaft to move upwards or downwards, and the turnover shaft drives the brake pad to be locked with the wire when the tipping bucket pulley does not move. The application can avoid the problem that the metal arm of the insulating boom truck is insufficient for the safety distance of the live body when the insulating boom truck is directly used to send the operating personnel into the power plant; the insulating hard ladder is prone to overturning during installation, and the operation safety is low; four cable wind ropes of the control personnel can be reduced, the operating personnel configuration can be reduced, the operation range can be reduced, time can be saved, the work efficiency can be improved, and the operation risk can be reduced.

Description

Technical Field

[0001] This invention relates to the field of power distribution network technology, specifically a method for conducting live disconnection and connection of substations using an insulated rigid ladder. Background Technology

[0002] Live disconnection of the 220kV substation busbar side for current diversion is a pioneering project of the power grid company in recent years. This new project avoids substation busbar outages, reduces switching operations, and significantly lowers power grid risks, making it of great importance. The current connection method is as follows:

[0003] (1) When using an insulated bucket truck to directly send equipotential workers into a strong electric field, the metal arm may not be far enough from the live body during some phase operations, requiring secondary ladder hanging. At the same time, workers need to repeatedly move the position of the insulated bucket truck, which is inefficient and time-consuming.

[0004] (2) The secondary hanging ladder requires the use of four guy ropes, which requires a large number of workers and a large area, and the safety of the operation is not guaranteed.

[0005] (3) An insulated climbing platform is used to send equipotential workers into a strong electric field. There are many devices below the substation busbar, and some phases do not have suitable climbing platform support points, so it is impossible to carry out the work. Summary of the Invention

[0006] The purpose of this invention is to provide a method for conducting live disconnection and connection of substations using an insulated rigid ladder, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A method for conducting live disconnection and connection of substation using an insulated rigid ladder includes an insulated rigid ladder connecting device and a tipping trolley device. The insulated rigid ladder connecting device includes an insulated rigid ladder body, a connecting rod, and a self-locking hook. The tipping trolley device includes a tipping bracket, a pulley II, a spring I, a tipping shaft, and a brake pad. An insulated rope is wound on the pulley II.

[0009] The specific method is as follows: The insulating rope of pulley II is connected to the self-locking hook of the tipping trolley device. The spring I is extended by the weight of the insulating ladder itself or by pulling the insulating rope from below, which drives the tilting shaft to move upward or downward. The tilting shaft drives the brake pad to lock together with the wire when the tipping trolley is not moving, thereby avoiding the problem of insufficient safety distance to live parts.

[0010] Preferably, the connecting rod includes a U-shaped top seat and a V-shaped base.

[0011] Preferably, the V-shaped base and the U-shaped top are rotatably connected by a rotating seat.

[0012] Preferably, the number of self-locking hooks is two sets, and the bottoms of the two sets of self-locking hooks are respectively connected to the U-shaped top seat by two sets of fixing bolts and matching nuts.

[0013] Preferably, the top two ends of the insulated rigid ladder body are connected to the two ends of the V-shaped base by fixing bolts and matching nuts.

[0014] Preferably, the self-locking hook is equipped with a pin and a self-locking plate.

[0015] Preferably, the pulley II is connected to one end of the tipping bucket support, and the pulley II and the tipping bucket support are connected by spring I.

[0016] Preferably, pulley I is installed at the end of the tipping bucket support away from pulley II. Self-locking plates for connecting to wires are symmetrically installed on both sides of pulley I. Springs ∥ and Ⅲ are respectively connected to the two self-locking plates, and self-locking safety devices are installed on springs ∥ and Ⅲ.

[0017] Preferably, both springs ∥ and Ⅲ pass through the end of the tipping bucket bracket and are connected to a T-shaped hook.

[0018] Preferably, the flip shaft is a two-section rotating shaft, and the brake pad and the spring I are connected by the flip shaft.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. This invention employs an insulated rigid ladder for live-line disconnection in substations. An insulated rope connected to a self-locking hook via pulley II on a tipping trolley is moved. By adjusting the pin and self-locking plate, the insulated rope is secured to the hook. The weight of the insulated rigid ladder or the pulling of the rope below causes spring I to extend, moving the tilting shaft upwards or downwards. The tilting shaft, acting as a brake, locks the trolley to the conductor when stationary. The insulated rope connection avoids the drawback of insufficient safety distance from live conductors in existing devices. It also prevents the insulated rigid ladder from tipping over during installation, improving safety. The tipping trolley can be hooked onto the conductor using an operating rod. When released, the self-locking safety is reset by the spring force, preventing the self-locking plate from resetting and achieving self-locking. This avoids the insulated bucket truck directly sending workers into a strong electric field, and in some phase operations, where insufficient safety distance between the metal arm and live conductors necessitates secondary ladder installation.

[0021] 2. The method of using an insulated rigid ladder to disconnect live parts in a substation, as described in this invention, avoids the insufficient safe distance between the metal arm and the live body when using an insulated bucket truck to directly transport workers into the power plant; the insulated rigid ladder is prone to overturning during installation, resulting in low operational safety; it can reduce the number of personnel controlling the four guy ropes, reduce the number of workers required, narrow the work area, save time, improve work efficiency, and reduce operational risks. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are explained in detail together with the embodiments of the invention, but do not constitute a limitation thereof.

[0023] Figure 1 This is a schematic diagram of the structure of the insulated rigid ladder connection device of the present invention;

[0024] Figure 2 This is a schematic diagram of the left side of the tipping trolley device of the present invention;

[0025] Figure 3 This is a top view of the tipping trolley device of the present invention.

[0026] The meaning of each label in the diagram:

[0027] 1. Pin; 2. Self-locking hook; 3. Self-locking plate; 4. Connecting rod; 41. U-shaped top seat; 42. V-shaped base; 43. Rotating seat; 5. Insulated rigid ladder body; 6. Self-locking safety; 7. Self-locking plate; 8. Spring I; 9. Pulley II; 10. Pulley I; 11. Brake pad; 12. Tilting shaft; 13. Insulating rope; 14. Hook; 15. Spring ∥; 16. Spring III; 17. Wire; 18. Tipping bucket bracket. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] A method for conducting live disconnection and connection of substations using an insulated rigid ladder, such as... Figures 1-3As shown, the device includes an insulated rigid ladder connecting device and a tipping trolley device. The insulated rigid ladder connecting device includes an insulated rigid ladder body 5, a connecting rod 4, and a self-locking hook 2. The tipping trolley device includes a tipping bracket 18, a pulley II 9, a spring I 8, a tipping shaft 12, and a brake pad 11. An insulated rope 13 is wound around the pulley II 9. The specific method is as follows: the insulated rope 13 of the pulley II 9 is connected to the self-locking hook 2 of the tipping trolley device. The spring I 8 is extended by the weight of the insulated rigid ladder body 5 or by pulling the insulated rope 13 from below, which drives the tipping shaft 12 to move upward or downward. The tipping shaft 12 drives the brake pad 11 to lock together with the conductor when the tipping trolley is not moving, thereby avoiding the problem of insufficient safety distance to live parts.

[0030] This invention solves the following problems: it avoids the insufficient safe distance between the metal arm and live parts when using an insulated bucket truck to directly transport workers into the power plant; the insulated rigid ladder is prone to tipping over during installation, resulting in low operational safety; it can reduce the number of personnel controlling the four guy ropes, reduce the number of workers required, narrow the working area, save time, improve work efficiency, and reduce operational risks.

[0031] Furthermore, the connecting rod 4 includes a U-shaped top seat 41 and a V-shaped base 42. The V-shaped base 42 and the U-shaped top seat 41 are rotatably connected by a rotating seat 43. There are two sets of self-locking hooks 2. The bottoms of the two sets of self-locking hooks 2 are respectively connected to the U-shaped top seat 41 by two sets of fixing bolts and matching nuts. The top two ends of the insulated rigid ladder body 5 are respectively connected to the two ends of the V-shaped base 42 by fixing bolts and matching nuts.

[0032] Specifically, the self-locking hook 2 is equipped with a pin 1 and a self-locking locking piece 3, and the pulley II 9 is connected to one end of the tipping bucket bracket 18, and the pulley II 9 and the tipping bucket bracket 18 are connected by a spring I 8.

[0033] In addition, a pulley I10 is installed at the end of the tipping bucket support 18 away from the pulley II9. Self-locking plates 7 for connecting to the wire 17 are symmetrically installed on both sides of the pulley I10. Springs ∥15 and Ⅲ16 are respectively connected to the two self-locking plates 7. Self-locking safety 6 is installed on both springs ∥15 and Ⅲ16. Springs ∥15 and Ⅲ16 pass through the end of the tipping bucket support 18 and are connected to the T-shaped hook 14.

[0034] It is worth noting that the flip shaft 12 is a rotating shaft with two sections rotatably connected, and the brake pad 11 and the spring I8 are connected through the flip shaft 12.

[0035] The present invention discloses a method for live-line disconnection and connection of substations using an insulated rigid ladder, comprising an insulated rigid ladder connecting device and a tipping trolley device. The insulated rigid ladder connecting device includes a connecting rod 4 fixed to the insulated rigid ladder body 5 by bolts, and a self-locking hook 2 also fixed by bolts, the self-locking hook being provided with a pin 1 and a self-locking locking plate 3; the tipping trolley device includes a self-locking safety 6, a self-locking plate 7, a spring I 8, a pulley II 9, a pulley I 10, a brake pad 11, a tipping shaft 12, a hook 14, a spring ∥ 15, and a spring III 16. In practical applications, simply connect the insulating rope 13 on the tipping trolley via pulley II9 to the self-locking hook 2, and move the pin 1 and self-locking plate 3 to fix the insulating rope to the self-locking hook. The weight of the insulated ladder or the pulling of the insulating rope 13 below causes the spring I8 to extend, driving the tilting shaft 12 to move upwards or downwards. The tilting shaft 12, driving the brake plate 11, locks the tipping trolley to the conductor when it is not moving. The connection using an insulating rope avoids the drawback of insufficient safety distance from live parts in existing devices. It also avoids the problem of the insulated ladder easily tipping over during installation, improving safety. The tipping trolley can be hooked onto the conductor using the operating rod with the hook 14. When released, the self-locking safety 6 resets under the force of the spring, blocking the self-locking plate 7 to reset, thus achieving a self-locking effect. This prevents the insulated bucket truck from directly sending workers into a strong electric field, and avoids insufficient safety distance between the metal arm and live parts during some phase operations, requiring secondary ladder hanging.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for conducting live-line disconnection and connection in a substation using an insulated rigid ladder, characterized in that: It includes an insulated rigid ladder connecting device and a tipping bucket trolley device. The insulated rigid ladder connecting device includes an insulated rigid ladder body (5), a connecting rod (4), and a self-locking hook (2). The tipping bucket trolley device includes a tipping bucket bracket (18), a pulley II (9), a spring I (8), a tipping shaft (12), and a brake pad (11). An insulated rope (13) is wound on the pulley II (9). The pulley II (9) is connected to one end of the tipping bucket support (18), and the pulley II (9) and the tipping bucket support (18) are connected by spring I (8); The tipping bucket bracket (18) is equipped with a pulley I (10) at one end away from the pulley II (9). Self-locking pieces (7) for connecting to the wire (17) are symmetrically installed on both sides of the pulley I (10). Spring II (15) and spring III (16) are respectively connected to the two self-locking pieces (7). Self-locking safety devices (6) are installed on both spring II (15) and spring III (16). The flip shaft (12) is a rotating shaft with two sections rotatably connected. The brake pad (11) and the spring I (8) are connected through the flip shaft (12). The specific method is as follows: the insulating rope (13) of pulley II (9) is connected to the self-locking hook (2) of the insulating hard ladder connecting device. The spring I (8) is extended by the weight of the insulating hard ladder body (5) or by pulling the insulating rope (13) from below, causing the flipping shaft (12) to move up or down. The flipping shaft (12) drives the brake pad (11) to lock together with the wire when the tipping trolley is not moving, thereby avoiding the problem of insufficient safety distance to the live body.

2. The method for conducting live-line disconnection of substations using an insulated rigid ladder according to claim 1, characterized in that: The connecting rod (4) includes a U-shaped top seat (41) and a V-shaped base (42).

3. The method for conducting live-line disconnection of substations using an insulated rigid ladder according to claim 2, characterized in that: The V-shaped base (42) and the U-shaped top seat (41) are rotatably connected by a rotating seat (43).

4. The method for conducting live-line disconnection of substations using an insulated rigid ladder according to claim 2, characterized in that: The number of self-locking hooks (2) is two sets, and the bottom of the two sets of self-locking hooks (2) are respectively connected to the U-shaped top seat (41) by two sets of fixing bolts and matching nuts.

5. The method for conducting live-line disconnection of substations using an insulated rigid ladder according to claim 2, characterized in that: The top two ends of the insulated rigid ladder body (5) are respectively connected to the two ends of the V-shaped base (42) by fixing bolts and matching nuts.

6. The method for conducting live-line disconnection of substations using an insulated rigid ladder according to claim 1, characterized in that: The self-locking hook (2) is equipped with a pin (1) and a self-locking plate (3).

7. The method for conducting live-line disconnection of substations using an insulated rigid ladder according to claim 6, characterized in that: Both springs II (15) and III (16) pass through the end of the tipping bucket bracket (18) and are connected to the T-shaped hook (14).

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