阅读说明：本技术 一种吊装高压支柱绝缘子的方法 (Method for hoisting high-voltage post insulator ) 是由 魏忠明 王俊卿 赵红伟 杨猛 李进收 任汉智 周愈敏 李欣明 李春龙 彭敬博 杨 于 2021-07-08 设计创作，主要内容包括：本发明涉及一种整体吊装高压支柱绝缘子的方法,包括吊具确定、安装均压环、安装U型环、吊具组装、整体吊装高压支柱绝缘子。本发明有效解决了现有施工方法由于逐节起吊带来劳动强度大、工作效率低下及高处作业带来安全风险高等问题,确保安全、可靠、高效地整体安装或拆除高压支柱绝缘子。(The invention relates to a method for integrally hoisting a high-voltage post insulator, which comprises the steps of determining a lifting appliance, installing an equalizing ring, installing a U-shaped ring, assembling the lifting appliance and integrally hoisting the high-voltage post insulator. The invention effectively solves the problems of high labor intensity, low working efficiency, high safety risk caused by high-altitude operation and the like caused by section-by-section hoisting in the conventional construction method, and ensures that the high-voltage post insulator is integrally installed or removed safely, reliably and efficiently.)

1. A method for integrally hoisting a high-voltage post insulator is characterized by comprising the following steps: the method comprises the following steps:

step (1) determination of lifting appliance

Measuring parameters of the high-voltage post insulator to be hoisted, and selecting a lifting appliance with a proper length according to the parameters of the high-voltage post insulator to be hoisted;

step (2) installing a grading ring

Integrally cushioning the assembled upper, middle and lower high-voltage post insulators on a wood crib with proper height on a flat ground, and installing a grading ring on the top of an upper flange of the upper high-voltage post insulator, wherein 4 symmetrical connecting lining ribs of the grading ring are symmetrically arranged at 180 degrees during installation;

step (3) installing the tool U-shaped ring

Installing 4 tool U-shaped rings on an upper flange of an upper section high-voltage post insulator, wherein the tool U-shaped rings are symmetrically and horizontally distributed in two holes for a steering tool to use; arranging 2 tool U-shaped rings at the flange neck on the lower section of post insulator; arranging 1 tool U-shaped ring at the neck of a lower flange of a lower section high-voltage post insulator;

step (4) assembling the lifting appliance

Respectively surrounding any end of each of the two main hanging strips at the neck where an upper flange of a lower section high-voltage post insulator is fixedly connected with the high-voltage post insulator, and respectively connecting rope ends of the two main hanging strips with a main rope of the main hanging strip by using 2U-shaped rings, and respectively penetrating the two main hanging strips which are symmetrically arranged at 180 degrees through 2 pairs of U-shaped rings of steering tools symmetrically and horizontally distributed on the tops of the upper flange of the upper section high-voltage post insulator and hooking the two main hanging strips on a hook of a crane;

step (5) hoisting integral high-voltage post insulator

The large hook and the small hook of the crane are adjusted to slowly rise, the high-voltage post insulator is integrally and gradually erected until the high-voltage post insulator is integrally in an upright suspension state, the small hook of the crane is descended to be stopped at about 1 meter from the top of the upper high-voltage post insulator, an auxiliary hanging strip and 1 tool U-shaped ring which are arranged at the neck of a lower flange of the lower high-voltage post insulator are removed, the crane is instructed to continue to be hung to the installation position for installation, and the whole posture adjustment process of the high-voltage post insulator is guaranteed to be completed in the air all the time.

2. The method of claim 1, wherein: in the step (1), measuring the parameters of the high-voltage post insulator to be hoisted specifically comprises:

measuring the total height of the upper, middle and lower high-voltage post insulators; measuring the diameter of a through hole of a flange on the upper section post insulator; measuring the outer diameter of a grading ring of the high-voltage post insulator; and acquiring the total weight of the upper, middle and lower high-voltage post insulators, the equalizing ring and the connecting bolts.

3. The method of claim 1, wherein: in the step (2), the upper and lower lining ribs are respectively connected, and the rest 4 holes on the top of the flange on the upper section high-voltage post insulator are in crossed arrangement.

4. The method of claim 1, wherein: in the step (3), the U-shaped rings have the same structure; two U-shaped rings are symmetrically fixed in the 2 through holes which are symmetrically distributed on the flange of the upper section high-voltage post insulator in a cross shape and are in horizontal positions in the cross arrangement in a 180-degree mode respectively; the other two U-shaped rings are respectively connected with the first two U-shaped rings to form a U-shaped ring group of the steering tool.

5. The method of claim 1, wherein: hoisting the high-voltage post insulator further comprises the step (6) of dismantling the high-voltage post insulator, which comprises the following steps:

step (6.1) Sling determination

Measuring parameters of the high-voltage post insulator to be removed, and selecting a lifting appliance with a proper length according to the parameters of the high-voltage post insulator to be removed;

step (6.2) with the external diameter of the equalizing ring of the high-voltage post insulator as a reference, stacking the wood stack with proper, firm and reliable height on the flat ground by using materials such as sleepers and the like;

step (6.3) hoisting of main sling

Respectively hooking any one end of each of the two main hanging strips on a large hook of a crane with a large hook and a small hook, adjusting the two main hanging strips to be right above a high-voltage post insulator to be disassembled, respectively penetrating through 2 pairs of steering tool U-shaped ring groups symmetrically fixed on the top of an upper flange of an upper section of the high-voltage post insulator at 180 degrees, symmetrically surrounding the other end of each main hanging strip at the neck of an upper flange of a lower section of the high-voltage post insulator at 180 degrees, and respectively connecting the rope heads of the two main hanging strips with a main rope of the main hanging strips by using 2U-shaped rings;

step (6.4) hanging any one end of an auxiliary hanging strip which is about 2 meters longer than the total height of the upper, middle and lower three-section high-voltage post insulators on a small hook of a crane;

step (6.5) adjusting the large hook to slowly rise to enable the main hanging strip to immediately stop after being slightly stressed, removing a connecting and fixing bolt between a lower flange of the lower section of the high-voltage post insulator and the foundation, commanding the crane to slowly lift the high-voltage post insulator until the high-voltage post insulator is in an upright suspension state, continuing to lift the high-voltage post insulator to an open position and slowly descending the high-voltage post insulator to about 1 meter away from the ground to stop;

step (6.6) commanding the crane to hang the auxiliary hanging strip to slowly descend the small hook, and stopping when the small hook is about 1 m away from the top of the upper section high-voltage post insulator; the other end of the auxiliary sling is encircled at the neck of the lower flange of the lower section of the post insulator, and the rope end is connected and fixed on the main rope of the auxiliary sling by a tool U-shaped ring;

step (6.7) the whole high-voltage post insulator is adjusted from a vertical state to a horizontal state by slowly adjusting the size of the hook, so that the whole posture adjustment process of the high-voltage post insulator is always finished in the air;

and (6.8) stably placing the high-voltage post insulator on a wood stack with proper, firm and reliable height, and ensuring that the grading ring is not subjected to additional stress all the time.

6. The method of claim 1, wherein: in the step (6.1), the measuring of the parameters of the high-voltage post insulator to be hoisted specifically comprises:

measuring the total height of the upper, middle and lower high-voltage post insulators; measuring the diameter of a through hole of a flange on the upper section post insulator; measuring the outer diameter of a grading ring of the high-voltage post insulator; and acquiring the total weight of the upper, middle and lower high-voltage post insulators, the equalizing ring and the connecting bolts.

7. The method of claim 1, wherein: in the step (6.2), two equalizing ring lining ribs are arranged at the upper part and the lower part respectively, and the 4 residual holes on the top of the flange on the upper section high-voltage post insulator are in crossed arrangement in a cross shape.

8. The method of claim 1, wherein: in the step (6.2), 4 tool U-shaped rings are arranged on an upper flange of an upper section high-voltage post insulator and are symmetrically and horizontally distributed in holes for a steering tool to use; arranging 2 tool U-shaped rings at the flange neck on the lower section of post insulator; and arranging 1 tool U-shaped ring at the neck of the lower flange of the lower section high-voltage post insulator.

9. The method of claim 1, wherein: the lifting appliance comprises two equilong main lifting belts which are symmetrically arranged at 180 degrees, 4U-shaped steering tool rings and 2U-shaped tool rings which are connected and fixed with the main lifting belts; 1 tool U-shaped ring connected with and fixing the auxiliary sling; and 4U-shaped rings of the steering tool are symmetrically arranged and connected and fixed on the through holes on the upper flange of the upper section high-voltage post insulator respectively.

Technical Field

The invention relates to the field of electric power construction, in particular to a method for hoisting a high-voltage post insulator.

Background

The high-voltage post insulator is a special device of an electric power system, generally comprises an upper single-section post insulator, a middle single-section post insulator, a lower single-section post insulator and a plurality of single-section post insulators, wherein the upper single-section post insulator, the middle single-section post insulator, the lower single-section post insulator and the plurality of single-section post insulators are connected through flanges between the upper single-section post insulator and the lower single-section post insulator, and a voltage-equalizing ring is further arranged at the top of the high-voltage post insulator to ensure safe operation. The installation or removal and hoisting process of the high-voltage post insulator requires that the high-voltage post insulator must be kept in a vertical state.

The nylon sling is a sling for installing or removing high-voltage post insulators and is widely applied to production and construction operation sites of electric power and the like. When the high-voltage post insulator is installed or removed, a nylon sling and a tool U-shaped ring are firstly used for connecting and fixing the high-voltage post insulator, and then the high-voltage post insulator is slowly lifted by a lifting machine.

Taking the installation of a high-voltage post insulator as an example, the existing construction method comprises the following specific steps:

(1) the auxiliary main sling 1 is encircled at the flange neck of the lower section high-voltage post insulator in a 180-degree manner, the rope head of the auxiliary main sling 1 is connected with the main rope of the auxiliary main sling 1 by an auxiliary tool U-shaped ring 3, and the auxiliary main sling is hooked on a crane hook.

(2) And commanding the crane to lift the lower section high-voltage post insulator to a specified position, and completing the installation operation at high altitude. (3) And sequentially hoisting to finish the middle-section and upper-section high-voltage post insulators and the grading rings.

Taking the removal of the high-voltage post insulator as an example, the specific construction method is as follows:

(1) a pair of main hanging strips 1 surrounds the flange neck on the upper section high-voltage post insulator in a 180-degree manner, and the rope heads of the pair of main hanging strips 1 are connected with the main ropes of the main hanging strips by a pair of tool U-shaped rings 3 respectively and are hooked on a crane hook.

(2) After the command crane enables the hanging strip to be slightly stressed, the middle-section flange connecting bolt and the upper-section flange connecting bolt are removed at high altitude, and the command crane lifts the upper-section high-voltage post insulator and the equalizing ring to a specified position.

(3) And sequentially detaching the suspended middle-section and lower-section high-voltage post insulators.

Because the high-voltage post insulators and the equalizing rings are hoisted section by section, the labor intensity of high-altitude operation is high, the working efficiency is low, and the safety risk is higher.

Disclosure of Invention

In order to solve the problems and potential safety hazards in the prior art, the invention provides a method for safely, reliably and efficiently installing or dismantling and hoisting a high-voltage post insulator by using parallel arrangement hanging strips.

The purpose of the invention is realized by the following technical scheme:

a method for integrally hoisting a high-voltage post insulator comprises the following steps:

step (1) determination of lifting appliance

Measuring parameters of the high-voltage post insulator to be hoisted, and selecting a lifting appliance with a proper length according to the parameters of the high-voltage post insulator to be hoisted;

step (2) installing a grading ring

Integrally cushioning the assembled upper, middle and lower high-voltage post insulators on a wood crib with proper height on a flat ground, and installing a grading ring on the top of an upper flange of the upper high-voltage post insulator, wherein 4 symmetrical connecting lining ribs of the grading ring are symmetrically arranged at 180 degrees during installation;

step (3) installing the tool U-shaped ring

Installing 4 tool U-shaped rings on an upper flange of an upper section high-voltage post insulator, wherein the tool U-shaped rings are symmetrically and horizontally distributed in two holes for a steering tool to use; arranging 2 tool U-shaped rings at the flange neck on the lower section of post insulator; arranging 1 tool U-shaped ring at the neck of a lower flange of a lower section high-voltage post insulator;

step (4) assembling the lifting appliance

Respectively surrounding any end of each of the two main hanging strips at the neck where an upper flange of a lower section high-voltage post insulator is fixedly connected with the high-voltage post insulator, and respectively connecting rope ends of the two main hanging strips with a main rope of the main hanging strip by using 2U-shaped rings, and respectively penetrating the two main hanging strips which are symmetrically arranged at 180 degrees through 2 pairs of U-shaped rings of steering tools symmetrically and horizontally distributed on the tops of the upper flange of the upper section high-voltage post insulator and hooking the two main hanging strips on a hook of a crane;

step (5) hoisting integral high-voltage post insulator

And (3) adjusting the large hook and the small hook of the crane to slowly rise, gradually erecting the integral high-voltage post insulator until the integral high-voltage post insulator is in an upright suspension state, descending the small hook of the crane to be about 1 m away from the top of the upper-section high-voltage post insulator, stopping, removing the auxiliary sling on the small hook, commanding the crane to continuously hoist to the installation position for installation, and ensuring that the whole posture adjustment process of the high-voltage post insulator is finished all the time in the air.

Further, in the step (1), measuring parameters of the high-voltage post insulator to be hoisted specifically includes:

measuring the total height of the upper, middle and lower high-voltage post insulators; measuring the diameter of a through hole of a flange on the upper section post insulator; measuring the outer diameter of a grading ring of the high-voltage post insulator; and acquiring the total weight of the upper, middle and lower high-voltage post insulators, the equalizing ring and the connecting bolts.

Furthermore, in the step (2), two upper and two lower lining ribs are connected, and the remaining 4 holes on the top of the flange on the upper section high-voltage post insulator are in crossed arrangement.

Further, in the step (3), the U-shaped rings have the same structure; two U-shaped rings are symmetrically fixed in the 2 through holes which are symmetrically distributed on the flange of the upper section high-voltage post insulator in a cross shape and are in horizontal positions in the cross arrangement in a 180-degree mode respectively; the other two U-shaped rings are respectively connected with the first two U-shaped rings to form a U-shaped ring group of the steering tool.

Further, hoisting the high-voltage post insulator further comprises the step (6) of dismantling the high-voltage post insulator, and the method comprises the following steps:

step (6.1) Sling determination

Measuring parameters of the high-voltage post insulator to be removed, and selecting a lifting appliance with a proper length according to the parameters of the high-voltage post insulator to be removed;

step (6.2) with the external diameter of the equalizing ring of the high-voltage post insulator as a reference, stacking the wood stack with proper, firm and reliable height on the flat ground by using materials such as sleepers and the like;

step (6.3) hoisting of main sling

Respectively hooking any one end of each of the two main hanging strips on a large hook of a crane with a large hook and a small hook, adjusting the two main hanging strips to be right above a high-voltage post insulator to be disassembled, respectively penetrating through 2 pairs of steering tool U-shaped ring groups symmetrically fixed on the top of an upper flange of an upper section of the high-voltage post insulator at 180 degrees, encircling the other end of each main hanging strip at the neck of an upper flange of a lower section of the high-voltage post insulator, and respectively connecting the rope heads of the two main hanging strips with a main rope of the main hanging strip by using 2U-shaped rings;

step (6.4) hanging any one end of an auxiliary hanging strip which is about 2 meters longer than the total height of the upper, middle and lower three-section high-voltage post insulators on a small hook of a crane;

step (6.5) adjusting the large hook to slowly rise to enable the main hanging strip to immediately stop after being slightly stressed, removing a connecting and fixing bolt between a lower flange of the lower section of the high-voltage post insulator and the foundation, commanding the crane to slowly lift the high-voltage post insulator until the high-voltage post insulator is in an upright suspension state, continuing to lift the high-voltage post insulator to an open position and slowly descending the high-voltage post insulator to about 1 meter away from the ground to stop;

step (6.6) commanding the crane to hang the auxiliary hanging strip to slowly descend the small hook, and stopping when the small hook is about 1 m away from the top of the upper section high-voltage post insulator; the other end of the auxiliary sling is encircled at the neck of the lower flange of the lower section of the post insulator, and the rope end is connected and fixed on the main rope of the auxiliary sling by a tool U-shaped ring;

step (6.7) the whole high-voltage post insulator is adjusted from a vertical state to a horizontal state by slowly adjusting the size of the hook, so that the whole posture adjustment process of the high-voltage post insulator is always finished in the air;

and (6.8) stably placing the high-voltage post insulator on a wood stack with proper, firm and reliable height, and ensuring that the grading ring is not subjected to additional stress all the time.

Further, in the step (6.1), the measuring parameters of the high-voltage post insulator to be hoisted specifically includes:

measuring the total height of the upper, middle and lower high-voltage post insulators; measuring the diameter of a through hole of a flange on the upper section post insulator; measuring the outer diameter of a grading ring of the high-voltage post insulator; and acquiring the total weight of the upper, middle and lower high-voltage post insulators, the equalizing ring and the connecting bolts.

Further, in the step (6.2), two equalizing ring lining ribs are arranged at the upper part and the lower part respectively, and the 4 residual holes on the top of the flange on the upper section high-voltage post insulator are in crossed arrangement.

Further, in the step (6.2), 4 tool U-shaped rings are installed on the upper flange of the upper section high-voltage post insulator and are symmetrically and horizontally distributed in holes for a steering tool to use; arranging 2 tool U-shaped rings at the flange neck on the lower section of post insulator; and arranging 1 tool U-shaped ring at the neck of the lower flange of the lower section high-voltage post insulator.

Further, the lifting appliance comprises two equilong main lifting belts which are symmetrically arranged at 180 degrees, 4 turning tool U-shaped rings and 2 tool U-shaped rings which are connected and fixed with the main lifting belts; 1 tool U-shaped ring connected with and fixing the auxiliary sling; and 4U-shaped rings of the steering tool are symmetrically arranged and connected and fixed on the through holes on the upper flange of the upper section high-voltage post insulator respectively.

Compared with the prior art, the invention has the following beneficial effects:

the invention effectively solves the problems of high labor intensity, low working efficiency, high safety risk caused by high-altitude operation and the like caused by section-by-section hoisting in the conventional construction method, and ensures that the high-voltage post insulator is safely, reliably and efficiently installed or removed.

Drawings

FIG. 1 is a schematic structural view of a hanger assembly for removing a high-voltage post insulator according to the present invention;

wherein: 1-upper section high-voltage post insulator, 2-middle section high-voltage post insulator, 3-lower section high-voltage post insulator, 4-U-shaped ring, 5-equalizing ring, 6-equalizing ring lining rib, 7-main sling and 8-auxiliary sling.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples without making any creative effort, shall fall within the protection scope of the present invention.

Unless otherwise defined, technical or scientific terms used in the embodiments of the present application should have the ordinary meaning as understood by those having ordinary skill in the art. The use of "first," "second," and similar terms in the present embodiments does not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. "Upper," "lower," "left," "right," "lateral," "vertical," and the like are used solely in relation to the orientation of the components in the figures, and these directional terms are relative terms that are used for descriptive and clarity purposes and that can vary accordingly depending on the orientation in which the components in the figures are placed.

Fig. 1 is a schematic diagram illustrating the assembly of the lifting tool when the high-voltage post insulator is removed, and as shown in fig. 1, the lifting tool for lifting the high-voltage post insulator of the present embodiment includes two main lifting belts 7 with equal length. The equalizing ring 5 is sleeved on the flange top of the upper end of the upper-section high-voltage post insulator 1, is fixed through 4 equalizing ring lining ribs 6 and is not in contact with the upper-section high-voltage post insulator 1, one end of each equalizing ring lining rib 6 is connected with a flange on the upper end of the high-voltage post insulator 1, and the other end of each equalizing ring lining rib is connected with the equalizing ring 5.

Installing 4U-shaped rings 4 of steering tools into holes symmetrically distributed on an upper section flange of an upper section high-voltage post insulator for the steering tools; 2 tool U-shaped rings are arranged at the upper flange neck of the lower post insulator; 1 instrument U type ring is established in the neck department of lower section post insulator lower section flange.

Two ends of the two main hanging belts 7 are respectively provided with 1 tool U-shaped ring. And 4 (2 are a pair) steering tool U-shaped rings 4 which are respectively and symmetrically arranged at 180 degrees and are fixedly connected on through holes on an upper flange of the upper section high-voltage post insulator.

The method for hoisting the high-voltage post insulator comprises the following steps:

step (1) determination of lifting appliance

Measuring the total heights of the upper high-voltage post insulator 1, the middle high-voltage post insulator 2 and the lower high-voltage post insulator 3; measuring the diameter of a through hole of a flange on the upper section post insulator 1; measuring the outer diameter of the high-voltage post insulator grading ring 5; acquiring the total weight of the upper, middle and lower high-voltage post insulators, the equalizing rings and the connecting bolts; according to technical parameters and the like of a high-voltage post insulator to be hoisted, slings such as a sling, a tool U-shaped ring and the like with proper length and safety and reliability are selected.

Step (2) installing a grading ring

The assembled upper, middle and lower high-voltage post insulators are integrally padded on a wood crib with proper height on a flat ground, the grading ring 5 is arranged on the top of the upper flange of the upper high-voltage post insulator 1, 4 grading ring lining ribs 6 which are symmetrical to the grading ring are symmetrically arranged in an up-and-down 180-degree mode when the grading ring is installed, namely, the upper grading ring lining rib and the lower grading ring lining rib are respectively two, and the rest 4 holes on the top of the upper flange of the upper high-voltage post insulator are in crossed arrangement in a cross mode.

Step (3) installing the U-shaped ring

Turning to the tool U type ring: respectively and symmetrically fixing the 1 st U-shaped ring and the 2 nd U-shaped ring in the 4 (2 as a pair) U-shaped rings 4 of the steering tools in 180 degrees in 2 through holes in horizontal positions in crossed arrangement in a cross shape in the rest 4 holes in 8 holes symmetrically distributed on a flange on the upper section high-voltage post insulator; then, the 3 rd and 4 th tool U-shaped rings are connected with the 1 st and 2 nd tool U-shaped rings to form the turning tool U-shaped ring.

Tool U-shaped ring: 2U-shaped rings are arranged at the upper flange neck of the lower post insulator; and arranging 1U-shaped ring at the neck of the lower section flange of the lower section post insulator.

Step (4) hoisting the main sling

Any end of the two main hanging strips 7 respectively surrounds the neck part which is connected and fixed with the high-voltage post insulator by 180 degrees at the upper flange of the lower high-voltage post insulator 3, and after the rope heads of the two main hanging strips 7 are connected with the main rope of the two main hanging strips by 2 tool U-shaped rings, the two main hanging strips 7 which are symmetrically arranged by 180 degrees respectively pass through 2 pairs of steering tool U-shaped rings 4 which are symmetrically fixed on the top of the upper flange of the upper high-voltage post insulator and are hooked on a crane hook.

Step (5) hoisting high-voltage post insulator

And commanding the crane to adjust the lifting hook to slowly rise, gradually erecting the high-voltage post insulator until the high-voltage post insulator is in an upright suspended state, and continuously lifting to the mounting position for mounting.

And (6) removing the high-voltage post insulator, wherein the operation method comprises the following steps:

6.1 hanger determination

Measuring the total height of the upper, middle and lower high-voltage post insulators; measuring the diameter of a through hole of a flange on the upper section post insulator; measuring the outer diameter of a grading ring of the high-voltage post insulator; acquiring the total weight of the upper, middle and lower high-voltage post insulators, the equalizing rings and the connecting bolts; according to the technical parameters of the high-voltage post insulator to be hoisted and the like, a lifting appliance with proper length and safety and reliability is selected.

6.2 installing U-shaped ring

Respectively and symmetrically fixing the 1 st and 2 nd tool U-shaped rings in 4 (2 are a pair) steering tool U-shaped rings 4 in 2 through holes in horizontal positions in a cross arrangement in a cross shape, wherein the remaining 4 holes in 8 holes symmetrically distributed in an upper flange of an upper high-voltage post insulator at 180 degrees are respectively fixed in 2 through holes in the cross arrangement in the cross shape; then, the 3 rd and 4 th tool U-shaped rings are connected with the 1 st and 2 nd tool U-shaped rings to form the turning tool U-shaped ring.

Tool U-shaped ring: 2U-shaped rings are arranged at the upper flange neck of the lower post insulator; and arranging 1U-shaped ring at the neck of the lower section flange of the lower section post insulator.

And 6.3, using the outer diameter of the high-voltage post insulator grading ring 5 as a reference, and using a sleeper and other materials to stack a wood pile with proper, firm and reliable height on the flat ground.

6.4 Main suspender hoisting

Any end of two main hanging strips 7 is respectively hooked on a big (main) hook of a crane with big (main) hook and small (auxiliary) hook, the hanging strips are hung by a command crane hook and adjusted right above a high-voltage post insulator to be dismantled, the hanging strips respectively pass through 2 pairs of steering tool U-shaped rings 4 symmetrically fixed on the top of an upper flange of an upper section of the high-voltage post insulator at 180 degrees, the steering tool U-shaped rings encircle necks fixedly connected with the upper flange of a lower section of the high-voltage post insulator, and the rope ends of the two main hanging strips 7 are respectively connected with a main rope of the steering tool U-shaped rings by 2 tools.

6.5, an auxiliary hanging strip 8 which is about 2 meters longer than the total height of the upper, middle and lower sections of high-voltage post insulators and a U-shaped ring at the neck of a lower section flange of the lower section of post insulators are hooked on a small (auxiliary) hook of the crane.

6.6, commanding the crane to adjust the large (main) hook to slowly rise, stopping the main hanging strip 7 immediately after being stressed slightly, removing the connecting and fixing bolt between the lower section flange of the high-voltage post insulator and the foundation, commanding the crane to slowly lift the high-voltage post insulator until the high-voltage post insulator is vertically suspended, continuing to lift to an open position and slowly descending to about 1 meter away from the ground, and stopping.

6.7, slowly descending the small (auxiliary) hook to lift the auxiliary sling 8 to be about 1 meter away from the top of the upper-section high-voltage post insulator, and stopping;

6.8, connecting the rope head of the auxiliary sling 8 to the main rope of the auxiliary sling 8 by using a U-shaped ring at the neck of the lower section flange of the lower section pillar insulator;

6.9, the crane is commanded to adjust the size (main and auxiliary) hooks slowly, so that the whole high-voltage post insulator is adjusted from a vertical state to a horizontal state, and the whole adjusting process always ensures that the post insulator is finished in the air. The command crane stably puts the high-voltage post insulators on a wood stack which is proper, firm and reliable in height, and ensures that the grading rings are not subjected to additional stress all the time.

The main sling 1 and the auxiliary sling 5 of the embodiment are both nylon slings.

In summary, with the method of this embodiment, after the two main suspension straps are arranged in parallel on both sides of the high-voltage post insulator, the two main suspension straps respectively pass through the two U-shaped rings of the steering tool fixed at the top end of the upper flange of the upper high-voltage post insulator in 180 ° arrangement, so that the parallel suspension straps are always limited by the U-shaped rings of the steering tool, and the main suspension straps are always arranged in 180 ° parallel without displacement.

Because the U-shaped ring of the steering tool is positioned at the topmost end of the high-voltage post insulator, the main hanging strip is ensured to be always away from the equalizing ring connecting lining rib in the hoisting process, and the main hanging strip is ensured not to receive extra stress. And then because two main sling rope ends symmetrically arranged at two sides of the high-voltage post insulator are respectively connected with the main ropes of the two tools, the upward pulling force and the downward gravity of the whole hanging piece of the upper flange of the lower section high-voltage post insulator are converged on the upper flange of the lower section high-voltage post insulator, and the structure of the whole hanging piece stress balance hanger is firm and reliable under the mutual acting force.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.