A method for dry-type tower in-out electric field operation

Abstract

The application discloses a dry letter type tower in-out electric field operation method, comprising the following steps: S1, hoisting the field operation tool of the dry letter type tower, the field operation tool comprises a main insulation flat ladder, an auxiliary insulation flat ladder, a backup safety rope and an insulation binding rope, the backup safety rope is fixed on the cross arm firm component of the ground wire; S2, the auxiliary insulation flat ladder is erected on the cross arm and is arranged on the cross arm firm component and is fixed by using the first insulation binding rope; the first end of the main insulation flat ladder is fixed on the wire end of the implemented phase, the tail end of the main insulation flat ladder is lap jointed and fixed with the auxiliary insulation flat ladder, and the electric field is entered along the main insulation flat ladder to carry out the maintenance operation; S3, after the maintenance is completed, the main insulation flat ladder and the auxiliary insulation flat ladder are removed in sequence. The problems that the implementation is difficult, the labor intensity is large, the combined gap is small and it is difficult to stay in the electric field for a long time when the equal potential maintenance operation is implemented on the dry letter type tower are overcome.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of live working of power transmission line, in particular to a method for entering and exiting electric field of dry letter type tower. BACKGROUND

[0002] The rapid economic development cannot be separated from the continuous, stable and reliable power output, and the uninterrupted power supply cannot be separated from the strong power network, and cannot be separated from the increasingly advanced live maintenance technology. The special tower type of 110-220kV power transmission line dry letter type tower makes the implementation of isopotential maintenance work difficult, the labor intensity is large, the combined gap is small, and it is difficult to stay in the electric field for a long time. The problem has been plagued by live maintenance workers. In order to solve the problem of entering and exiting the electric field of the middle phase and the large angle side phase of the dry letter type tower, the maintenance personnel have made many innovations in methods and tools: first, the combination tool of centipede ladder and insulating flat ladder. This method does not reduce the labor intensity of climbing the centipede ladder, and the maintenance personnel cannot stay on the centipede ladder for a long time. The combined tool swings left and right uncontrollably during the process of the maintenance personnel entering and exiting the electric field. Second, the middle phase cross arm of the dry letter type tower is particularly short, and can only use the method of hanging an insulating soft ladder. The isopotential maintenance worker enters and exits the electric field by climbing the insulating soft ladder, which has high labor intensity and the worker cannot stay on the soft ladder for a long time. Third, the lengthened insulating flat ladder can meet the combined gap, but the lengthened insulating flat ladder has a sharp decline in bending resistance and bearing capacity when its length is increased, and its safety is difficult to control. Moreover, the length is too long to increase the difficulty of erection. Fourth, the electric lifting tool is used. This method reduces the labor intensity of manually climbing the soft ladder, but the related supporting tools are more, and the maintenance worker can only rely on standing on the soft ladder to work, which is difficult to stay in the electric field for a long time, and has not been widely used in actual field. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a method for entering and exiting the electric field of a dry letter type tower, which overcomes the problems of difficult implementation, high labor intensity, small combined gap and difficulty in staying in the electric field for a long time when implementing isopotential maintenance work in the electric field of a 110-220kV power transmission line dry letter type tower.

[0004] To solve the above technical problems, a technical solution adopted by the present application is:

[0005] A method for entering and exiting the electric field of a dry letter type tower, comprising the following steps:

[0006] S1, hoist the on-site working tool of the dry letter type tower, the on-site working tool comprising a main insulating flat ladder, an auxiliary insulating flat ladder, a backup safety rope and an insulating binding rope, the backup safety rope being fixed to the cross arm firm component of the ground wire;

[0007] S2, the vice insulation flat ladder is set on the cross arm and is arranged on the cross arm firm component and is fixed by using the first insulation binding rope; the head end of the main insulation flat ladder is fixed on the conductor end of the implemented phase, the tail end of the main insulation flat ladder is overlapped and fixed with the vice insulation flat ladder, and the maintenance operation is carried out along the main insulation flat ladder into the electric field;

[0008] S3, after the maintenance is completed, the main insulation flat ladder and the vice insulation flat ladder are removed in sequence.

[0009] The method has the advantages that the dry letter type tower access electric field operation method is provided, the main and vice insulation ladders are vertically overlapped or horizontally overlapped, the fixing is realized by using the insulation binding rope, the freedom of the combined body is large, the adjustment of the combined gap is more flexible, the vice insulation flat ladder is more stable, the problem that the combined tool construction is prone to swing and difficult to control is overcome, the problem that the long-time residence electric field operation cannot be realized when the soft ladder method is used for maintenance operation is overcome, and the problem that the safety is low due to the large erection difficulty and performance decline when the insulation flat ladder is directly lengthened is overcome. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a flow chart of the dry letter type tower access electric field operation method of the embodiment of the present application.

[0011] Figure 2 It is a middle phase vertical overlapping schematic diagram of the dry letter type tower access electric field operation method of the embodiment of the present application.

[0012] Figure 3 It is an outer rotating side phase horizontal overlapping schematic diagram of the dry letter type tower access electric field operation method of the embodiment of the present application.

[0013] Label explanation:

[0014] 1, pulley; 2, insulation lifting rope; 3, ladder hook; 4, main insulation flat ladder; 5, vice insulation flat ladder; 6, insulation pulling rope; 7, universal hook head. DETAILED DESCRIPTION

[0015] In order to explain the technical content, the achieved purposes and effects of the present application in detail, the following is described in combination with the embodiments and the accompanying drawings.

[0016] The dry letter type tower access electric field operation method comprises the following steps:

[0017] S1, the on-site operation tool of the dry letter type tower is hoisted, the on-site operation tool comprises a main insulation flat ladder, a vice insulation flat ladder, a backup safety rope and an insulation binding rope, and the backup safety rope is fixed on the cross arm firm component of the ground wire;

[0018] S2, the vice insulation flat ladder is erected on the cross arm and is arranged on the cross arm firm component and is fixed by using the first insulation binding rope; the head end of the main insulation flat ladder is fixed on the conductor end of the implemented phase, the tail end of the main insulation flat ladder is overlapped and fixed with the vice insulation flat ladder, and the main insulation flat ladder is entered into the electric field to carry out the maintenance work;

[0019] S3, after the maintenance is completed, the main insulation flat ladder and the vice insulation flat ladder are sequentially removed.

[0020] From the above description, the beneficial effects of the present application are that a dry letter type tower access electric field operation method is provided, the main and vice insulation ladders are vertically overlapped or horizontally overlapped and combined, the combination is fixed by using the insulation binding rope, the freedom of the combination is large, the adjustment of the combination gap is more flexible, and the vice insulation flat ladder is more stable. The problems of swinging and difficult control when the combined tool of the centipede ladder and the insulation flat ladder is used for construction are overcome, the problem that the soft ladder method cannot be used for long time to stay in the electric field operation is overcome, and the problem that the safety is low due to the large erection difficulty and performance decline when the insulation flat ladder is directly lengthened is overcome.

[0021] Further, step S1 includes:

[0022] The field operation tool is placed on the moisture-proof felt, and the insulation resistance of the main insulation flat ladder and the vice insulation flat ladder is not less than 700 megaohms.

[0023] From the above description, the field operation tool is subjected to moisture removal treatment, and the insulation flat ladder has a large resistance, so that the safety during construction operation is ensured.

[0024] Further, step S1 includes:

[0025] The trolley is hoisted by the insulation hoisting rope at the ground wire cross arm of the dry letter type tower, the vice insulation flat ladder and the backup safety rope are hoisted, and the backup safety rope is fixed on the cross arm firm component of the ground wire.

[0026] From the above description, the trolley and the backup safety rope are hoisted first, so that the subsequent tool transmission is facilitated, and the safety of the construction personnel is ensured.

[0027] Further, in step S2, the maintenance work in the electric field along the main insulation flat ladder is specifically:

[0028] The trolley rope hung on the head end of the main insulation flat ladder is transferred to the conductor, the trolley rope is used to transmit the maintenance tool materials up and down, and the maintenance work in the electric field is carried out.

[0029] From the above description, the trolley can be used to conveniently and quickly transmit the maintenance tool materials.

[0030] Further, when the work is performed on the phase of the dry letter type tower, step S2 is specifically:

[0031] The auxiliary insulating ladder is vertically arranged on the cross arm of the ground wire, the head end of the auxiliary insulating ladder is hooked on the cross arm fastening member of the ground wire, and the first insulating binding rope is used for binding and fixing.

[0032] The head end of the main insulating ladder is hung on the conductor or the connecting fitting at the end of the phase conductor, the tail end of the main insulating ladder is inserted into the ladder joint of the auxiliary insulating ladder, the second insulating binding rope is used for binding and fixing the main insulating ladder and the auxiliary insulating ladder at the inflection point position of the insertion, and a channel vertically accessing the electric field is built.

[0033] As known from the above description, the insulating binding rope can be conveniently fixed at multiple positions, the main and auxiliary insulating ladders can be flexibly and conveniently moved and combined, and the length adjustment freedom is greater. Meanwhile, the swing of the auxiliary insulating ladder is reduced and controlled.

[0034] Further, when the work is performed on the outer side phase of the dry letter type tower, step S2 is specifically:

[0035] The auxiliary insulating ladder is horizontally arranged on the cross arm of the work side phase, the first insulating binding rope is used for horizontally binding and fixing the auxiliary insulating ladder on the cross arm fastening member of the side phase, and the tail end of the auxiliary insulating ladder is bound and fixed on the ground wire cross arm fastening member in the upward and upward direction.

[0036] The head end of the main insulating ladder is hung on the conductor or the connecting fitting at the end of the phase conductor, the second insulating binding rope is used for binding and fixing the main insulating ladder and the auxiliary insulating ladder at the inflection point position, and a channel horizontally accessing the electric field is built.

[0037] As known from the above description, the horizontal lapping combination of the main and auxiliary insulating ladders makes up for the situation that the vertical lapping cannot meet the combination gap requirement when the work is performed on the outer side phase, and the insulating binding rope can be conveniently fixed at multiple positions, the main and auxiliary insulating ladders can be flexibly and conveniently moved and combined, and the swing of the auxiliary insulating ladder is reduced and controlled.

[0038] Further, step S3 is specifically:

[0039] The second insulating binding rope is released at the inflection point position, the main insulating ladder is removed and transferred to the ground;

[0040] The backup safety rope is released, the first insulating binding rope is released, the auxiliary insulating ladder is removed, and the auxiliary insulating ladder and the backup safety rope are transferred to the ground.

[0041] From the above description, the insulating binding rope, the backup safety rope and the insulating flat ladder are released in reverse order when entering the electric field, and the strictness of the construction process ensures safety.

[0042] The above-mentioned dry letter type tower entering and exiting electric field operation method can overcome the problems of difficult implementation, high labor intensity, small combined gap and difficult long-time electric field operation when implementing equipotential maintenance operation in the dry letter type tower entering and exiting electric field of 110-220kV power transmission line. The following will be described through specific embodiments:

[0043] Noun explanation:

[0044] Combined gap: refers to the distance between the human body and the tower body and the distance between the human body and the live body during the process of entering and exiting the electric field channel in the live working operation. The combined gap needs to meet 110kV not less than 1.2m, 220kV not less than 2.1m in the entering and exiting electric field operation, otherwise it will cause electric shock injury to the human body.

[0045] Example one

[0046] Please refer to Figure 1 A dry letter type tower entering and exiting electric field operation method, comprising the following steps:

[0047] Firstly, before the operation, the necessary tools for the operation are prepared and checked, the on-site operation tools are placed on the moisture-proof felt cloth, the insulation resistance of the main and auxiliary insulating flat ladders 4 and 5 is not less than 700 megaohms, and the resistance of the farthest two ends of the complete shielding suit is not more than 20 ohms.

[0048] S1, hoist the on-site operation tools of the dry letter type tower, the on-site operation tools include the main and auxiliary insulating flat ladders 4 and 5, the backup safety rope and the insulating binding rope, the backup safety rope is fixed on the cross arm firm member of the ground wire;

[0049] Specifically, the first electrician carries the trolley 1 and the insulating hoisting rope 2 to climb to the ground wire cross arm of the dry letter type tower, hoists the trolley 1 to the ground wire cross arm of the dry letter type tower through the insulating hoisting rope 2, hoists the auxiliary insulating flat ladder 5, the backup safety rope and the insulating binding rope, and fixes the backup safety rope on the cross arm firm member of the ground wire.

[0050] S2, when implementing the operation in the dry letter type tower, please refer to Figure 2, first, the vice insulation flat ladder 5 is erected on the cross arm, and is arranged on the cross arm firm member, is fixed with the first insulating binding rope, two fixed points or four fixed points are arranged, so as to reduce and control the swing of the vice insulation flat ladder 5. Specifically, the first electrician and the second electrician vertically erect the vice insulation flat ladder 5 on the cross arm of the ground wire, the first end of the vice insulation flat ladder 5 is hooked on the ground wire cross arm firm member by using the universal hook head 7, and is fixed by using the first insulating binding rope. The position on the vice insulation flat ladder 5 corresponding to the same horizontal position as the middle phase implementation operation point is the inflection point position, then, the potential equalization electrician hangs the backup safety rope, and moves to the inflection point position along the vice insulation flat ladder 5.

[0051] Then, the first end of the main insulation flat ladder 4 is fixed on the middle phase conductor end by using the ladder head hook 3, and the tail end of the main insulation flat ladder 4 is inserted and fixed with the vice insulation flat ladder 5. Specifically, the first end of the main insulation flat ladder 4 is hung on the conductor or the connecting fitting of the middle phase conductor end, the tail end of the main insulation flat ladder 4 is inserted with the ladder joint of the vice insulation flat ladder 5, the main insulation flat ladder 4 and the vice insulation flat ladder 5 are fixed by using the second insulating binding rope at the inflection point position of the insertion, and the channel for vertically entering and exiting the electric field is built.

[0052] After the channel is built, the potential equalization electrician enters the electric field along the main insulation flat ladder 4 to carry out the maintenance work. Specifically, when the potential equalization electrician enters the electric field, a reliable connection with the live body needs to be established, then the trolley rope hung on the first end of the main insulation flat ladder 4 is transferred to the conductor, the maintenance tool materials are transmitted up and down by using the trolley rope, and the maintenance work in the resident electric field is carried out.

[0053] S3, after the maintenance is completed, the main insulation flat ladder 4 and the vice insulation flat ladder 5 are removed in turn.

[0054] Specifically, after the potential equalization electrician completes the maintenance, the potential equalization electrician is separated from the electric field and exits to the inflection point position, the second insulating binding rope is removed at the inflection point position, the main insulation flat ladder 4 is removed and is transferred to the ground;

[0055] The potential equalization electrician moves to the cross arm position and removes the backup safety rope; the first electrician and the second electrician remove the first insulating binding rope and remove the vice insulation flat ladder 5, and transfer the vice insulation flat ladder 5 and the safety rope to the ground.

[0056] Finally, it should be ensured that there is no residual material on the tower and the conductor, the personnel on the tower get off the tower, the site is cleaned up, and the personnel are evacuated from the work site.

[0057] Example two

[0058] The difference between the embodiment and the embodiment one is that the preferred specific operation of step S2 when the outer side phase of the dry letter type tower is implemented is different from the operation when the middle phase of the dry letter type tower is implemented.

[0059] Please refer to Figure 3When the work is implemented on the outer side of the dry letter type tower, first, the auxiliary insulating flat ladder 5 is erected on the cross arm of the implemented side phase and is arranged on the cross arm firm member, is fixed by using the first insulating binding rope, two fixed points or four fixed points are arranged to reduce and control the swing of the auxiliary insulating flat ladder 5. Specifically, the auxiliary insulating flat ladder 5 is transversely erected on the cross arm of the side phase, the auxiliary insulating flat ladder 5 is horizontally bound and fixed on the side phase cross arm firm member by using the first insulating binding rope, and the insulating pulling rope 6 of the end of the auxiliary insulating flat ladder 5 is bound and fixed on the ground wire cross arm firm member in the upward direction. Then, the standby safety rope is hung by the equipotential electrician, and the equipotential electrician moves to the inflection point position along the auxiliary insulating flat ladder 5.

[0060] Then, the first end of the main insulating flat ladder 4 is fixed on the side phase conductor end by using the ladder head hook 3, and the end of the main insulating flat ladder 4 is lap joint fixed with the auxiliary insulating flat ladder 5. Specifically, the first end of the main insulating flat ladder 4 is hung on the conductor or the connecting fitting of the implemented side phase conductor end, the main insulating flat ladder 4 and the auxiliary insulating flat ladder 5 are bound and fixed at the inflection point position by using the second insulating binding rope, and the channel for transversely entering and exiting the electric field is built. After the channel is built, the equipotential electrician enters the electric field along the main insulating flat ladder 4 to perform the maintenance work.

[0061] In summary, the method for entering and exiting the electric field of the dry letter type tower provided by the application builds the transverse or vertical channel for entering and exiting the electric field by using the insulating binding rope to combine and fix the main and auxiliary insulating flat ladder combination, so that the problems of difficulty in implementation, large labor intensity, small combination gap and difficulty in long-time staying in the electric field during the implementation of the equipotential maintenance work of the dry letter type tower are overcome.

[0062] It should be noted that, for the foregoing method embodiments, in order to facilitate description, they are all expressed as a series of action combinations, but those skilled in the art should know that the application is not limited by the action sequence described, because according to the application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily essential to the application.

[0063] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0064] The above only describes the embodiments of the application, and does not limit the patent scope of the application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the application.

Claims

1. A method for operating a dry letter block tower into and out of an electric field, characterized by, The method comprises the following steps: S1, hoisting the on-site operation tool of the dry letter type tower, the on-site operation tool comprising a main insulating ladder, an auxiliary insulating ladder, a backup safety rope and an insulating binding rope, the backup safety rope being fixed to the cross arm firm member of the ground wire; S2, erecting the auxiliary insulating ladder on the cross arm and arranging the auxiliary insulating ladder on the cross arm firm member, and fixing the auxiliary insulating ladder by using the first insulating binding rope; fixing the head end of the main insulating ladder to the conductor end of the phase being implemented, and fixedly connecting the tail end of the main insulating ladder with the auxiliary insulating ladder, and entering the electric field along the main insulating ladder to perform the maintenance operation; S3, after the maintenance is completed, sequentially removing the main insulating ladder and the auxiliary insulating ladder; In the phase implementation operation of the dry letter type tower, step S2 is specifically as follows: vertically erecting the auxiliary insulating ladder on the cross arm of the ground wire, hooking the head end of the auxiliary insulating ladder to the cross arm firm member of the ground wire, and fixing the auxiliary insulating ladder by using the first insulating binding rope; hanging the head end of the main insulating ladder on the conductor or the connecting fitting of the conductor end of the middle phase, plugging the tail end of the main insulating ladder with the ladder joint of the auxiliary insulating ladder, and fixing the main insulating ladder and the auxiliary insulating ladder to the inflection point position of the plugging by using the second insulating binding rope, and building a vertical channel for entering and exiting the electric field; In the outer edge phase implementation operation of the dry letter type tower, step S2 is specifically as follows: horizontally erecting the auxiliary insulating ladder on the cross arm of the edge phase, fixing the auxiliary insulating ladder on the cross arm firm member of the edge phase by using the first insulating binding rope, and fixing the insulating pulling rope of the tail end of the auxiliary insulating ladder to the cross arm firm member of the ground wire in the upward direction; hanging the head end of the main insulating ladder on the conductor or the connecting fitting of the conductor end of the edge phase, fixing the main insulating ladder and the auxiliary insulating ladder to the inflection point position by using the second insulating binding rope, and building a horizontal channel for entering and exiting the electric field; Step S3 is specifically as follows: removing the second insulating binding rope at the inflection point position, removing the main insulating ladder and transferring the main insulating ladder to the ground; removing the backup safety rope, removing the first insulating binding rope, removing the auxiliary insulating ladder, and transferring the auxiliary insulating ladder and the safety rope to the ground.

2. A method of operating a dry-type tower into and out of an electric field according to claim 1, characterized in that, Before step S1, the following step is included: placing the on-site operation tool specification on the moisture-proof felt, and the insulating resistance of the main insulating ladder and the auxiliary insulating ladder is not less than 700 megaohms.

3. A method for operating a dry-type tower in and out of an electric field according to claim 1, characterized in that, Step S1 comprises the following steps: hoisting the trolley on the cross arm of the ground wire of the dry letter type tower by the insulating hoisting rope, hoisting the auxiliary insulating ladder and the backup safety rope, and fixing the backup safety rope to the cross arm firm member of the ground wire.

4. A method for operating a dry-type tower in and out of an electric field according to claim 1, characterized in that, In step S2, entering the electric field along the main insulating ladder to perform the maintenance operation is specifically as follows: transferring the trolley rope hung at the head end of the main insulating ladder to the conductor, and transferring the maintenance tool materials up and down by using the trolley rope to carry out the maintenance operation in the resident electric field.

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