Method for replacing a string of tangent insulators on a portal above live equipment

Abstract

The application discloses a method for replacing a strain insulator string of a gantry above a live device, which comprises: oppositely arranged gantries and two bridge ropes connected between the oppositely arranged gantries, and an insulating net connected with the bridge ropes; the replacing method comprises connecting and spreading the insulating net, and specifically comprises: fixing two ends of the middle part of the insulating net in the length direction on the two bridge ropes respectively, and fixing the two ends of the middle part in a direction perpendicular to the directions of the two bridge ropes; movably connecting sliding devices on the two edges of the insulating net in the length direction; and spreading the insulating net by pulling the sliding devices. The live device and the insulator string to be replaced are isolated and protected by using the insulating net and by a flexible spreading mode, when a high-position operator replaces the insulator, the live device and the high-position falling object damage are protected, the personal safety of the high-position operator is ensured, the power supply reliability of a transformer substation is ensured, and the operation power grid risk is reduced.

Description

Technical Field

[0001] This invention relates to the field of live equipment replacement technology, and more particularly to a method for replacing tension insulator strings on a gantry above live equipment. Background Technology

[0002] Tension insulator strings are crucial components in substations, serving as insulation between power transmission lines and the grounding conductors on the towers. They primarily consist of two types: ceramic tension insulator strings and glass tension insulator strings. Tension insulator strings effectively isolate energized conductors from the ground and maintain the proper position of each conductor.

[0003] During the operation of power equipment and lines, insulators are subjected to high voltage currents and changes in the natural environment for extended periods. This leads to a decline in the insulation capacity of the insulators, as well as aging and damage, seriously threatening the operational safety of substations and transmission lines. Therefore, in the later stages of operation and maintenance of transmission lines, the replacement of tension insulator strings is involved in the gantry cranes above substations and other power equipment. Current replacement methods require that the crossing points of the tension insulator strings to be replaced be switched to a de-energized state, resulting in a complete power outage at the substation and posing Level I and II grid risks. Summary of the Invention

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0005] In view of the aforementioned existing problems, the present invention is proposed.

[0006] Therefore, this invention provides a method for replacing tension insulator strings on gantry frames above live equipment, which solves the problem that current replacement methods do not meet the existing substation operation requirements, cause Class I and II power grid risks, and require power outages and manpower consumption.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution, including:

[0008] The gantry 100 is arranged opposite to each other, and two bridge ropes 101 are connected between the oppositely arranged gantry 100, and an insulating net 102 is connected to the bridge ropes 101;

[0009] The replacement method includes connecting and spreading the insulating mesh 102, specifically including:

[0010] An insulating net 102 is fixed to a bridge rope 101. The two ends of the middle part of the insulating net 102 along its length are respectively fixed to two bridge ropes 101, and the fixing direction of the two ends of the middle part is perpendicular to the direction of the two bridge ropes 101.

[0011] The insulating net 102 is pulled and spread by the sliding device 200, and the two edges of the insulating net 102 along its length are movably connected to the sliding device 200.

[0012] As a preferred embodiment of the method for replacing tension insulator strings on a gantry above live equipment according to the present invention, the method of connecting and spreading the insulating net further includes pulling the insulating net 102 in the length direction by means of a sliding device 200, wherein the sliding device 200 is arranged parallel to each other at certain intervals.

[0013] As a preferred embodiment of the method for replacing tension insulator strings on the gantry above the live equipment described in this invention, the method of connecting and spreading the insulating net further includes further tightening and loosening the insulating net 102 by means of an insulating net rope 102a, wherein the insulating net rope 102a passes through the length direction of the insulating net 102, and the passage is in an S-shape, passing through the upper and lower surfaces of the insulating net 102 at certain intervals.

[0014] As a preferred embodiment of the method for replacing tension insulator strings on the gantry above the live equipment described in this invention, wherein: the distance between the S-shaped insertion and exit at certain intervals is the same as the distance between the sliding device 200 at certain intervals, and the insertion and exit positions are horizontal to the position of the sliding device 200.

[0015] As a preferred embodiment of the method for replacing tension insulator strings on a gantry above live equipment according to the present invention, the method of connecting and spreading the insulating net further includes further tightening and loosening the insulating net 102 by means of an insulating net rope 102a, wherein the insulating net rope 102a passes through the width direction of the insulating net 102 and connects the two ends of the insulating net 102 in the width direction.

[0016] As a preferred embodiment of the method for replacing tension insulator strings on a gantry above live equipment according to the present invention, the insulating net 102, after being laid out, is isolated between the live equipment D below and the insulator string C to be replaced.

[0017] As a preferred embodiment of the method for replacing tension insulator strings on a gantry above live equipment according to the present invention, the replacement method further includes replacing the insulator strings, specifically including...

[0018] A 300mm bottle support frame is installed to support the insulator strings;

[0019] One end of the tensioner 400 is fixed to the crossarm of the gantry frame, and the other end is connected to the tension clamp 401 fixed to the bridge rope 101.

[0020] The tensioner 400 transfers the force on the insulator string to the tension clamp 401.

[0021] As a preferred embodiment of the method for replacing tension insulator strings on a gantry above live equipment according to the present invention, the method for replacing the insulator strings further includes:

[0022] The insulator string is connected to the tension clamp 500 via insulator pins;

[0023] After the force is transferred to the tension clamp 401, the insulator pin is removed, thereby removing the insulator string, and a new insulator string is installed on the tension clamp 500.

[0024] As a preferred embodiment of the method for replacing tension insulator strings on a gantry above live equipment according to the present invention, the replacement method further includes raising the bridge rope 101 before connecting and laying the insulation net 102, specifically including:

[0025] The bridge rope 101 is pulled up from the ground, which drives the sliding device 200 to slide and lift, thereby lifting the insulating net 102 connected between the bridge ropes 101;

[0026] Among them, the bridge rope 101 passes through the sliding device 200, and the sliding device 200 slides on the track on the gantry frame 100;

[0027] As a preferred embodiment of the method for replacing tension insulator strings on a gantry above live equipment according to the present invention, the replacement method further includes balancing the bridge rope 101 after raising the bridge rope 101, including...

[0028] If the bridge rope 101 is unbalanced, the unbalanced insulating net 102 can be adjusted by pulling the bridge rope 101.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention replaces the insulator string by installing two bridge ropes on both sides of the gantry frame. The bridge ropes cross the live equipment and are connected to the insulating net. The insulating net is unfolded to protect the conductor and the live equipment, thus isolating the live equipment from the insulator string to be replaced. When workers at height replace the insulators, the invention can protect the live equipment from damage caused by falling objects, ensuring the personal safety of workers at height, ensuring the reliability of power supply in the substation, and reducing the risk of power grid operation. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0031] Figure 1 This is a schematic diagram of the overall operation structure of the method for replacing tension insulator strings on a gantry above live equipment according to an embodiment of the present invention;

[0032] Figure 2 This is a detailed schematic diagram of part A of the operation structure diagram of the method for replacing tension insulator strings on a gantry above live equipment according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of an insulating mesh laying structure in the method for replacing tension insulator strings on a gantry above live equipment according to an embodiment of the present invention. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0035] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0036] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0037] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0038] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] Example 1

[0041] Reference Figure 1-3 As an embodiment of the present invention, a method for replacing tension insulator strings on a gantry above live equipment is provided, comprising:

[0042] The gantry 100 is arranged opposite to each other, and two bridge ropes 101 are connected between the oppositely arranged gantry 100, and an insulating net 102 is connected to the bridge ropes 101;

[0043] The replacement method includes connecting and spreading the insulating mesh 102, specifically including:

[0044] like Figure 1 , 3 As shown, the two ends of the insulation net 102 along its length are fixed to two bridge ropes 101 respectively, and the fixing direction of the two ends is perpendicular to the direction of the two bridge ropes 101.

[0045] The two edges of the insulating mesh 102 along its length are movably connected to sliding devices 200;

[0046] The insulating net 102 is pulled and spread out by the sliding device 200.

[0047] It should be noted that the sliding device 200 can be a sliding trolley or a sliding hook, etc., which can slide on both edges of the insulating net 102, thereby driving the insulating net 102 to spread out from the middle to the opposite direction. All materials used are insulating materials.

[0048] Preferably, the insulating net 102 can be woven using insulating rope with a diameter of 8mm. The width and length of the rope can be woven according to the laying site. Two bridge ropes 101 with a diameter of 10mm can be fixed to the two edges of the insulating net 102 using a sliding device 200. The two ends of the middle section of the insulating net 102 along its length can be fixed to the two bridge ropes 101 by means of fastening, short rope buckles, and small metal buckles.

[0049] Furthermore, connecting and spreading the insulating net also includes sliding devices 200 arranged parallel to each other at certain intervals, used to pull the insulating net 102 in the length direction.

[0050] Preferably, the sliding devices 200 are spaced 70cm apart, which can ensure that the insulation net does not sag excessively when pulled. At the same time, the parallel arrangement of the sliding devices 200 is mainly used to ensure that the spreading progress of the two edges of the insulation net 102 is synchronized.

[0051] In one embodiment, further, connecting and spreading the insulating net also includes an insulating net rope 102a passing through the insulating net 102 along its length, passing through the upper and lower surfaces of the insulating net 102 at regular intervals in an S-shape, for further deployment and retraction.

[0052] It should be noted that, as attached Figure 3 As shown, the insulating rope 102a passes through the upper and lower sides of the insulating net 102 at point S, and the intersection is point b in the figure. Its main function is that when the workers need to collect the net or further spread and adjust it, they can stretch it at both ends of the top of the gantry frame 100 to further collect the insulating net and adjust its position.

[0053] Furthermore, the S-shaped insertion and exit points are parallel to the sliding device 200 at regular intervals, and the insertion and exit points are horizontal to the position of the sliding device 200.

[0054] It should be noted that the insertion and exit positions are at the same distance from the sliding device 200 and are horizontal, mainly to ensure that the stretching direction is synchronized and to maintain the balance of the insulating mesh 102 as much as possible.

[0055] In one embodiment, further, connecting and spreading the insulating net can also be achieved by having the insulating net rope 102a pass through the width direction of the insulating net 102 and connect the two ends of the insulating net 102 in the width direction.

[0056] It should be noted that the insulating rope 102a can also be connected to the insulating net 102 in the width direction, thus providing another form, namely, the net can be rolled up and down in the width direction. The connection method can be knotted or fixed by metal buckles.

[0057] Furthermore, after the insulating mesh 102 is laid out, it isolates the energized equipment D below from the insulator string C to be replaced.

[0058] It should be noted that, due to the large number of live equipment in the substation, and the fact that the live equipment only meets the safe operating distance, the gap between the workers entering the electric field and the adjacent live equipment is small, which restricts the workers' movement and makes live work risky. After the insulation net 102 is laid out to isolate the live equipment from the insulator string to be replaced, the workers' range of movement is safer and their movements are more flexible.

[0059] The entire insulation netting is laid out using the principle of curtains, transforming vertically arranged netting into horizontally arranged netting at a high altitude. This allows for flexible laying of the insulation netting between live equipment, and the operation method is simple and highly safe.

[0060] Example 2

[0061] Reference Figure 1-2 As an embodiment of the present invention, based on the previous embodiment, a method for replacing tension insulator strings on a gantry above live equipment is provided, which further includes:

[0062] Replacing insulator string C specifically includes:

[0063] A 300mm bottle support frame is installed to support insulator string C;

[0064] One end of the tensioner 400 is fixed to the crossarm of the gantry frame, and the other end is connected to the tension clamp 401 fixed to the bridge rope 101.

[0065] The tensioner 400 transfers the force on the insulator string C to the tension clamp 401.

[0066] It should be noted that, with reference to the appendix Figure 2 The tensioner 400 and the tension clamp 401 are used together. After the tensioner 400 tightens the wire, the conductor is tightened, and the force on the insulator string C can be transferred to the tension clamp 401 clamped on the conductor, so that the insulator string C is not stressed.

[0067] Furthermore, replacing insulator string C also includes,

[0068] Insulator string C is connected to tension clamp 500 via insulator pins;

[0069] After the force is transferred to the tension clamp 401, the insulator pin is removed, thereby removing the insulator string C, and a new insulator string C is installed on the tension clamp 500.

[0070] Furthermore, the replacement method also includes pulling up the bridge rope 101 before connecting and laying the insulating net 102, specifically including,

[0071] The bridge rope 101 passes through the sliding device 200, which can slide on the track on the gantry frame 100;

[0072] The bridge rope 101 is manually pulled up from the ground, which drives the sliding device 200 to slide and lift, thereby lifting the insulating net 102 connected to the bridge rope 101.

[0073] Furthermore, the replacement method also includes balancing the bridge cable 101 after raising it, including...

[0074] If the bridge rope 101 is unbalanced, the unbalanced insulating net 102 can be adjusted by pulling the bridge rope 101.

[0075] It should be noted that the lifting bridge rope 101 and the balancing bridge rope 101 are both installed before the insulation net 102 is laid out, which can maximize the chance that the insulation net 102 will reach a parallel and balanced state more quickly during the laying process.

[0076] Example 3

[0077] Referring to Table 1, an embodiment of the present invention provides a method for replacing tension insulator strings on a gantry above live equipment. To verify its beneficial effects, a comparison with traditional control methods is provided.

[0078] Table 1 shows the comparison results with the traditional method.

[0079] Security ≥60％ ≥90％ Surrounding cooperation Power outage required No power outage required

[0080] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for replacing tension insulator strings on a gantry frame above live equipment, characterized in that, The gantry (100) is arranged opposite to each other and two bridge ropes (101) are connected between the oppositely arranged gantry (100), and an insulating net (102) is connected to the bridge ropes (101). The replacement method includes connecting and spreading the insulating mesh (102), specifically including: An insulating mesh (102) is fixed on a bridge rope (101). The two ends of the middle part of the insulating mesh (102) along its length are respectively fixed to two bridge ropes (101), and the fixing direction of the two ends of the middle part is perpendicular to the direction of the two bridge ropes (101). The insulating net (102) is pulled and spread by a sliding device (200), and the two edges of the insulating net (102) along its length are movably connected to the sliding device (200). The connection and spreading of the insulating net also includes pulling the insulating net (102) in the length direction by means of a sliding device (200), wherein the sliding device (200) is arranged parallel to each other at certain intervals; The connection and spreading of the insulating net also includes further tightening and loosening the insulating net (102) by means of an insulating net rope (102a). The insulating net rope (102a) passes through the length of the insulating net (102) in an S-shape at certain intervals on the upper and lower surfaces of the insulating net (102). The distances at which the S-shaped insertion and exit are parallel to the distances at which the sliding device (200) is set at regular intervals are the same, and the insertion and exit positions are horizontal to the position of the sliding device (200); The connection and spreading of the insulating net also includes further tightening and loosening the insulating net (102) by means of an insulating net rope (102a), the insulating net rope (102a) passing through the width direction of the insulating net (102) and connecting the two ends of the insulating net (102) in the width direction; After the insulating mesh (102) is laid out, it isolates the live equipment (D) below from the insulator string (C) to be replaced; The replacement method also includes replacing the insulator string, specifically including: Erect a bottle support frame (300) to support the insulator string; One end of the tensioner (400) is fixed to the crossarm of the gantry frame, and the other end is connected to the tension clamp (401) fixed to the bridge rope (101); The tensioner (400) transfers the force on the insulator string to the tension clamp (401).

2. The method for replacing tension insulator strings on a gantry frame above live equipment as described in claim 1, characterized in that, The replacement of the insulator string also includes: The insulator string is connected to the tension clamp (500) via insulator pins; After the force is transferred to the tension clamp (401), the insulator pin is removed, thereby removing the insulator string, and a new insulator string is installed on the tension clamp (500).

3. The method for replacing tension insulator strings on a gantry above live equipment as described in claim 2, characterized in that, The replacement method also includes raising the bridge rope (101) before connecting and laying the insulating net (102), specifically including: The bridge rope (101) is pulled up from the ground, which drives the sliding device (200) to slide and lift, thereby lifting the insulating net (102) connected between the bridge ropes (101). Among them, the bridge rope (101) passes through the sliding device (200), and the sliding device (200) slides on the track on the gantry (100).

4. The method for replacing tension insulator strings on a gantry above live equipment as described in claim 3, characterized in that, The replacement method also includes balancing the bridge rope (101) after raising it (101), including: If the bridge rope (101) is unbalanced, the unbalanced insulating net (102) is adjusted by pulling the bridge rope (101).

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