CN109462185B - Insulator hoisting method of high-voltage transmission line - Google Patents

Abstract

The invention discloses an insulator hoisting method of a high-voltage transmission line, which comprises the steps of firstly installing a hoisting pulley on the high-voltage transmission line, and winding an annular hoisting rope on the hoisting pulley; hooking a new insulator on an insulator hanging frame which is positioned on an annular lifting rope on one side of the lifting pulley and is close to the ground; hooking an old insulator detached from the high-voltage transmission line on an insulator hanger which is positioned on an annular lifting rope on the other side of the lifting pulley and is close to the lifting pulley; pulling down the annular lifting rope on one side where the old insulator is hung until the old insulator descends to be close to the ground, and lifting the new insulator on the other side to be close to the hoisting pulley; and taking the new insulator from the insulator hanger at the upper part, installing the new insulator on the high-voltage transmission line, and taking the old insulator from the insulator hanger at the lower part, thereby completing the hoisting of the new insulator and the old insulator. The invention can effectively improve the efficiency of hoisting the insulator and can also obviously improve the safety of hoisting the insulator.

Description

Insulator hoisting method of high-voltage transmission line

Technical Field

The invention relates to the technical field of high-voltage transmission line maintenance, in particular to a method for hoisting an insulator of a high-voltage transmission line.

Background

Due to the fact that insulators of high-voltage transmission lines are subjected to severe environments and high-voltage electric fields for a long time, performance of the insulators of the high-voltage transmission lines is gradually reduced after the insulators of the high-voltage transmission lines are used for a period of time, and therefore replacement of the insulators at high altitude becomes one of frequent overhauling work of the high-voltage transmission lines. Due to the limitation of the environment of the high-voltage transmission line, it is difficult for people to hoist insulators through existing hoisting machinery such as cranes during the maintenance of the high-voltage transmission line. The insulator comprises an insulating disc or cylindrical insulator and a steel ball head fixedly connected with the insulator, and in the prior art, people usually use a hanging rope hung on a power transmission line to hoist the insulator. The hanging rope is wound on a pulley arranged on the high-voltage transmission line, and two ends of the hanging rope are suspended on the bottom surface. When a new insulator needs to be lifted upwards, a worker on the ground firstly ties the steel rod piece of the bulb of the insulator at one end of the hanging rope and then pulls the other end of the hanging rope, so that the insulator can be lifted upwards, after the worker at a high position receives the insulator, the hanging rope is loosened to hold the new insulator, and then ties the steel rod piece of the detached old insulator on the hanging rope. At the moment, the ground worker gradually releases the other end of the hanging rope, so that the old insulator gradually descends to the ground. And the ground worker loosens the hanging rope, and after the old insulator is taken down, a new insulator can be lifted upwards again.

For example, "a transformer substation insulator hoisting frame" disclosed in the chinese patent literature, which is publication No. CN203284092U, includes a hoisting bracket and a bottom support, the hoisting bracket is composed of a pillar, a boom and a boom support, the lower end of the pillar is assembled with the bottom support, the upper end of the pillar is assembled with the boom, and the boom support is disposed between the pillar and the boom in an inclined arrangement. The bottom support is fixed on a transformer substation bus bridge foundation channel steel. The invention has the characteristics of simple structure and convenient installation, can obviously improve the working efficiency, lightens the labor intensity of constructors and meets the requirement of insulator hoisting.

However, although the hoisting device and the hoisting method have the advantages of simplicity, practicability, wide application range, low cost and the like, the following defects exist: firstly, tying the insulator on the hanging rope wastes time and labor, and the working efficiency is low. Particularly, for workers working aloft, the insulators can slide off the hands by a little carelessness, so that potential safety hazards are caused.

Disclosure of Invention

The invention aims to solve the problems of low working efficiency and potential safety hazard of the conventional insulator hoisting device and hoisting method, and provides the insulator hoisting method of the high-voltage transmission line, which can effectively improve the efficiency of hoisting the insulator and remarkably improve the safety of hoisting the insulator.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for hoisting an insulator of a high-voltage transmission line comprises the following steps:

a. a hoisting pulley is arranged on a high-voltage transmission line, and an annular hoisting rope which is connected end to end is wound on the hoisting pulley;

b. hooking a ball head of a steel rod piece of a new insulator on an insulator hanging frame which is positioned on an annular lifting rope on one side of a lifting pulley and is close to the ground;

c. hooking a ball head of a steel rod piece of an old insulator detached from the high-voltage transmission line on an insulator hanging frame which is positioned on an annular hanging rope on the other side of a hanging pulley and is close to the hanging pulley;

d. pulling down the annular lifting rope on one side hung with the old insulator until the old insulator gradually descends to be close to the ground, and correspondingly, synchronously lifting the new insulator on the other side to be close to the hoisting pulley;

e. taking down a new insulator from the insulator hanger close to the hoisting pulley, installing the new insulator on a high-voltage transmission line, and taking down an old insulator from the insulator hanger close to the ground;

f. and e, repeating the steps b to e, and finishing the hoisting of the new insulator and the old insulator.

The invention firstly installs a hoisting pulley on the high-voltage transmission line, so as to hoist the insulator by the annular hoisting rope wound on the hoisting pulley. Compared with the prior art, the insulator hanging frame is arranged on the annular lifting rope, so that the ball head of the steel rod piece of the insulator can be hooked on the insulator hanging frame, the lifting speed and efficiency can be obviously improved, the lifting safety can be ensured, and the falling phenomenon easily caused by binding with the lifting rope can be avoided.

Particularly, the invention adopts end-to-end annular lifting ropes, and insulator hangers close to the lifting pulleys and insulator hangers close to the ground are respectively arranged on the annular lifting ropes on the two sides of the lifting pulleys. Therefore, when the insulator is hoisted, the old insulator on the insulator hanging frame at the upper part and the new insulator on the insulator hanging frame at the lower part just form the balance of gravity, on one hand, the pulling force required for pulling the annular lifting rope can be remarkably reduced, the working strength of ground workers is reduced, on the other hand, the high-altitude workers can be effectively prevented from rapidly descending after the insulator is hooked, and the safety of the hoisting process is ensured. It should be noted that, in the present invention, a new insulator is creatively hooked on the insulator hanger at the lower portion, and since the insulator hooked at the lower portion of the circular lifting rope is initially supported on the ground, the circular lifting rope does not rapidly fall down and move on the lifting pulley. When the old insulator is hooked on the insulator hanging frame on the upper portion, the new insulator on the lower portion of the annular lifting rope plays a similar counterweight effect at the moment, and therefore the rapid movement of the annular lifting rope on the lifting pulley and the rapid falling of the new insulator can be avoided.

As preferred, the insulator stores pylon is including dismantling the stores pylon body of connection on annular lifting rope be equipped with the hook hole on the stores pylon body, the hook hole includes vertical hook straight hole of arranging, connects the circular hole of putting in the straight hole upper end of hook, the width in the straight hole of hook and the diameter looks adaptation of steel member, when needing the hook insulator, insert the circular hole of putting into with the bulb of the steel member of insulator, the insulator relies on the weight of self to move down, and the steel member slides down to the straight hole of hook from the circular hole of putting into, and the bulb on the steel member is the lower extreme of hook straight hole promptly.

It will be understood that the diameter of the circular insertion hole should be greater than the outer diameter of the ball of the steel rod, and the outer diameter of the ball should be greater than the width of the hooking straight hole. Therefore, the ball head of the steel rod piece is conveniently placed into the circular placing hole, then the insulator is loosened, the steel rod piece and the ball head move downwards along the straight hook hole under the action of self gravity, and the ball head can be hooked on the straight hook hole at the moment, so that the insulator is quickly and conveniently hooked on the insulator hanging frame. When the insulator needs to be taken down, the insulator can be taken down outwards easily only by moving the insulator upwards to enable the steel rod piece and the ball head to move upwards to the position of the circular placing hole. Particularly, in the process of lifting the insulator up and down, the insulator cannot automatically move upwards, so that the potential safety hazard that the insulator falls off automatically in the hoisting process can be avoided. It should be noted that a plurality of insulator hangers can be arranged on two sides of the annular lifting rope in a grid manner, so that a plurality of insulators can be lifted at one time, and the lifting efficiency can be improved.

Preferably, the hanging rack body is provided with a locking disc positioned beside the straight hole of the hook, a unidirectional rotating structure capable of controlling the transmission direction is arranged between the locking disc and the hanging rack body, the locking disc is provided with four radial locking bars uniformly distributed in the circumferential direction,

when an insulator needs to be hooked on the insulator hanging frame, the locking disc is in a clockwise-rotatable one-way putting-in state, then the ball head of the steel rod piece of the insulator is inserted into the circular putting-in hole, the insulator moves downwards depending on the weight of the insulator, the steel rod piece slides downwards to the hooking straight hole from the circular putting-in hole, and pushes a first radial locking rod obliquely striding over the hooking straight hole downwards until the steel rod piece is separated from the first radial locking rod and stays at the lower end of the hooking straight hole, at the moment, the locking disc rotates clockwise by 90 degrees, and a subsequent second radial locking rod obliquely strides over the junction of the hooking straight hole and the circular putting-in hole;

when the insulator needs to be taken down from the insulator hanging frame, the locking disc is firstly in a one-way taking-out state capable of rotating anticlockwise, then the insulator is moved upwards, the steel rod piece moves upwards from the hook straight hole to the circular placing hole, and pushes the radial locking rod obliquely crossing the hook straight hole upwards until the steel rod piece is separated from the radial locking rod and stays in the circular placing hole, and at the moment, the insulator can be taken down outwards.

The invention arranges a locking disc capable of rotating in one direction beside a straight hooking hole, and the locking disc is provided with four X-shaped crossed radial locking rods, wherein one radial locking rod close to the upper part of the straight hooking hole stays at the locking position of the inclined crossing straight hooking hole. Therefore, when the insulator is hooked, the steel rod on the insulator pushes the radial locking rod when moving downwards, and therefore the locking disc is driven to rotate. When the insulator moves down to the right place, the steel rod piece is separated from the radial locking rod, the locking disc rotates by 90 degrees, and the subsequent radial locking rod rotates to the locking position and cannot rotate reversely, so that the effect of blocking and hooking the straight hole is achieved, and the insulator can be prevented from falling off accidentally. When the insulator needs to be taken down, the locking disc can rotate reversely only by adjusting the transmission direction of the guide transmission structure capable of controlling the transmission direction, and the insulator can be conveniently hung on and taken down from the insulator. It can be understood that when we take off the insulator, a radial locking rod on the upper part can deviate from the hooking straight hole, correspondingly, a radial locking rod on the lower part can obliquely straddle on the lower part of the hooking straight hole, when we need to hook the insulator again, the steel rod on the insulator enters from the upper part of the hooking straight hole and moves downwards, and then the radial locking rod on the lower part is pushed to enable the locking disc to rotate. When the insulator moves down to the right position, the steel rod piece is separated from the radial locking rod, the radial locking rod deviates from the hook straight hole at the moment, and a subsequent radial locking rod just rotates to a locking position. That is, one radial lock rod among the four radial lock rods on the locking disk of the invention always obliquely strides on the straight hooking hole.

Preferably, the one-way rotating structure comprises a regular hexagon locking concave cavity arranged on the hanger body, a rotatable rotary ring is arranged in the locking concave cavity, six containing holes radially penetrating through the inner side wall and the outer side wall of the rotary ring are arranged in the rotary ring, the containing holes are uniformly distributed in the circumferential direction, locking cylinders are arranged in the containing holes, a rotary shaft is arranged at the center of the locking disc, a rotating hole is arranged at the center of the locking concave cavity, the rotating shaft can be rotatably inserted in the rotating hole, but articulated on the stores pylon body have flexible poker rod, are equipped with the location breach at the outside edge of rotating ring, and the inner location of poker rod is in the location breach, poker rod makes rotating ring location in one-way locking position, and locking cylinder inboard at this moment pastes and leans on the axis of rotation, and the cylindrical outside of locking is pasted and is leaned on the inside wall of locking cavity.

An annular cavity is formed between the locking cavity and the central rotating shaft, the outer side wall of the annular cavity is in a regular hexagon shape, and the inner side wall of the annular cavity is in a cylindrical shape. Therefore, the radial gap of the annular cavity is maximum at the vertex angle corresponding to the outer side wall of the regular hexagon and gradually decreases at two sides of the vertex angle until the radial gap reaches the minimum at the midpoint of the outer side wall of the regular hexagon. In addition, because the poker rod can elastically stretch out and draw back, consequently, it can form an axial effort to the rotating ring to the drive rotates the ring and rotates, and then makes the locking cylinder that sets up in the accommodation hole of rotating ring remove together. When the locking cylinder moves from the two sides of the maximum gap of the corresponding vertex angle of the annular cavity, the outer side cylindrical surface of the locking cylinder can be simultaneously attached to the regular hexagon side wall on the outer side and the rotating shaft cylindrical surface on the inner side, and when the rotating shaft rotates, the locking cylinder can be driven to move by depending on the friction force. At the moment, the rotating shaft can only drive the locking cylinder to rotate towards one side of the vertex angle, so that the locking cylinder moves towards the position with a larger radial gap of the annular cavity. If the axis of rotation antiport, then can drive the locking cylinder and remove towards the less position in the radial space of toroidal cavity, the locking cylinder at this moment will unable the removal to rely on static friction to form the locking to the axis of rotation, realize the one-way transmission of axis of rotation. When the poke rod is poked reversely, the rotating ring can be driven to rotate reversely, the locking cylinder in the rotating ring stays at a smaller radial gap of the annular cavity on the other side of the vertex angle, and then the rotating shaft forms one-way transmission in the opposite direction. That is, the invention can conveniently control the transmission direction of the one-way transmission structure through one poke rod, so as to be convenient for hooking the insulator on the insulator hanging rack or taking the insulator off from the insulator hanging rack.

Therefore, the invention has the following beneficial effects: the efficiency of insulator hoist and mount can be effectively improved, and the security of insulator hoist and mount can be remarkably improved.

Drawings

Fig. 1 is a schematic diagram of the hoisting process of the insulator.

Fig. 2 is a schematic structural view of the front surface of the insulator hanger.

Fig. 3 is a schematic structural view of the back of the insulator hanger.

Fig. 4 is a schematic structural view of the tap lever.

Fig. 5 is a schematic view of a structure of the insulator.

In the figure: 1. insulator 11, insulator 12, steel member 13, bulb 2, hoisting pulley 3, annular lifting rope 4, insulator stores pylon 41, stores pylon body 411, connect the through-hole 412, hook hole 42, locking disc 421, radial locking lever 422, axis of rotation 5, locking round platform 51, locking cavity 52, rotation groove 6, rotation ring 61, location breach 62, holding hole 7, locking cylinder 8, poker rod 81, the poker rod body 82, the telescope tube 83, the pressure spring.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

An insulator hoisting method of a high-voltage transmission line is suitable for replacing and maintaining an old insulator on the high-voltage transmission line, as shown in fig. 5, wherein an insulator 1 comprises an insulator 11, a steel rod 12 fixedly arranged on the insulator and a bulb 13 integrally arranged at the end part of the steel rod. The method comprises the following steps:

a. as shown in fig. 1, a hoisting pulley 2 is installed on a high-voltage transmission line in the air, an annular hoisting rope 3 connected end to end is wound on the hoisting pulley, insulator hangers 4 are respectively arranged on two sides of the hoisting pulley, the insulator hanger on one side is located at a dismounting position close to the hoisting pulley, and the insulator hanger on the other side is located at a hoisting position close to the ground. As the hoisting pulley arranged on the high-voltage transmission line belongs to the prior art, the embodiment is not described much, and specifically refer to chinese patent document CN 203284092U;

b. the ground operator hooks the ball head of the steel rod of the new insulator on the insulator hanging frame on the annular lifting rope, which is close to the ground, and the new insulator is stably hung at the lower end of the annular lifting rope under the action of self gravity;

c. an overhead worker on the high-voltage transmission line firstly removes an old insulator to be replaced from the high-voltage transmission line, and then hooks a ball head of a steel rod of the old insulator on an insulator hanging frame, close to the hoisting pulley, of the annular lifting rope, so that the insulators on two sides of the annular lifting rope are balanced. That is, the annular lifting rope cannot automatically lift and move at the moment;

d. the ground operator pulls the annular lifting rope on one side where the old insulator is hung downwards until the old insulator gradually descends to a lifting position close to the ground from the dismounting position, and correspondingly, the new insulator on the other side synchronously ascends to the dismounting position close to the lifting pulley from the lifting position;

e. the high-altitude operators take down a new insulator from the insulator hanging frame close to the hoisting pulley and install the new insulator on the high-voltage transmission line, and then the ground operators take down an old insulator from the insulator hanging frame close to the ground, so that the hoisting and the replacement of the new insulator and the old insulator for the first time are completed;

f. and e, repeating the steps b to e, and completing the hoisting and replacement of all the new and old insulators.

It can be understood that a plurality of insulator hangers can be arranged on two sides of the annular lifting rope in a grid manner respectively, so that a plurality of new and old insulators can be hoisted and replaced at one time, and the work efficiency can be improved. Of course, one insulator can be replaced at a time, and then the steps are correspondingly repeated according to the number of the insulators required to be replaced, so that replacement and hoisting of all the insulators are completed.

Preferably, as shown in fig. 2, the insulator hanger includes a hanger body 41 formed by press molding, a connecting through hole 411 is formed at an upper portion of the hanger body, and the circular hanging rope is inserted into the connecting through hole and a knot is formed at the connecting through hole, so that the insulator hanger is reliably connected to the circular hanging rope. In addition, set up the hook hole 412 that is located the connect the through-hole below on the stores pylon body, the hook hole is including setting up the straight hole of hook in the stores pylon body lower part vertically, connect the circular hole of putting in the straight hole upper end of hook, the width in the straight hole of hook and the diameter looks adaptation of steel member, and the aperture in circular hole of putting should be less than the bulb external diameter of insulator steel member.

When the insulator needs to be hung, the ball head of the steel rod piece of the insulator can be inserted into the circular placing hole, the insulator moves downwards by means of the weight of the steel rod piece, the steel rod piece slides downwards to the straight hanging hole from the circular placing hole, and the ball head on the steel rod piece is hung at the lower end of the straight hanging hole, so that the insulator is quickly hung on the insulator hanging frame.

When the insulator needs to be taken down, the insulator can be taken down outwards easily only by moving the insulator upwards to enable the steel rod piece and the ball head to move upwards to the position of the circular placing hole.

In order to avoid the accidental dropping of the insulator hooked on the insulator hanging frame, a rotatable locking disc 42 can be arranged at the left side of a straight hooking hole in the front of the hanging frame body, a one-way rotating structure capable of controlling the torque transmission direction of the locking disc is arranged between the locking disc and the hanging frame body, four radial locking rods 421 evenly distributed in the circumferential direction are arranged at the edge of the locking disc, the four radial locking rods on the locking disc are in an X-shaped cross shape, a first radial locking rod close to the upper portion of the straight hooking hole stays at a locking position, the radial locking rod obliquely strides at the cross-connection position of the straight hooking hole and a circular placing hole, and a previous radial locking rod in the clockwise direction just stays at a leaving position on the left side of the straight hooking hole. That is to say, one radial lock rod in the four radial lock rods on the locking disc obliquely strides on the hooking straight hole.

When the insulator is hung on the insulator hanging rack, the locking disc is in a one-way transmission state capable of rotating clockwise, then the ball head of the steel rod piece of the insulator is inserted into the circular placing hole, the insulator moves downwards by means of the weight of the steel rod piece, the steel rod piece slides downwards to the straight hanging hole from the circular placing hole, and pushes the first radial locking rod obliquely striding on the straight hanging hole downwards, so that the rotating disc is pushed to rotate clockwise. When the first radial locking rod rotates to a leaving position, the steel rod piece is separated from the first radial locking rod and stays at the lower end of the hook straight hole, the locking disc rotates clockwise by 90 degrees, and a second subsequent radial locking rod rotates to a locking position, so that the second radial locking rod obliquely spans the junction of the hook straight hole and the circular releasing hole;

when the insulator needs to be taken down from the insulator hanging frame, the locking disc is firstly in a one-way transmission state capable of rotating anticlockwise, then the insulator is moved upwards, the steel rod piece moves upwards from the hook straight hole to the circular placing hole, and pushes the radial locking rod obliquely crossing the hook straight hole upwards until the steel rod piece is separated from the radial locking rod and stays in the circular placing hole, and at the moment, the insulator can be taken down outwards.

In order to conveniently control the transmission direction of the locking disc, as shown in fig. 3 and 4, the unidirectional rotation structure of the invention comprises a locking circular table 5 fixedly arranged on the back surface of the hanger body, a regular hexagonal locking cavity 51 is arranged on the locking circular table, the locking cavity is fixedly connected on the back surface of the hanger body towards the opening side of the hanger body, a rotatable rotating ring 6 is arranged in the locking cavity, the cross section of the rotating ring is rectangular, six rectangular accommodating holes 62 radially penetrating through the inner side wall and the outer side wall of the rotating ring are arranged in the rotating ring, and the accommodating holes are uniformly distributed in the circumferential direction. In addition, a movable locking cylinder 7 is arranged in the accommodating hole, a rotating shaft 422 is arranged at the center of the locking disc, a rotating hole is arranged at the center of the locking concave cavity on the locking circular table, and the rotating shaft is rotatably inserted in the rotating hole, so that the locking disc can rotate relative to the locking circular table.

In addition, the side of the locking round platform is provided with a rotating groove 52 which radially penetrates through the locking cavity, a toggle rod body 81 is arranged in the rotating groove, the middle of the toggle rod body is hinged to the locking round platform, a telescopic sleeve 82 is sleeved at the inner end, close to the locking cavity, of the toggle rod body, a compressed pressure spring 83 is arranged in the telescopic sleeve, one end of the pressure spring abuts against the bottom of the telescopic sleeve, the other end of the pressure spring abuts against the end portion of the toggle rod body, and therefore the toggle rod body and the telescopic sleeve form an elastically telescopic toggle rod 8, and the toggle rod can swing in the rotating groove. Furthermore, it is necessary to provide a positioning notch 61 on the outer edge of the rotating ring, and the inner end of the poke rod is positioned in the positioning notch.

It will be appreciated that an annular cavity is formed between the locking cavity and the central rotating shaft, the outer side wall of the annular cavity being regular hexagonal and the inner side wall being cylindrical. Therefore, the annular cavity has the largest radial clearance at the vertex angle corresponding to the outer side wall of the regular hexagon, the radial clearance is gradually reduced at the two sides of the vertex angle, and the smallest radial clearance is arranged at the midpoint corresponding to the outer side wall of the regular hexagon. During installation, the rotating ring and the locking cylinder are sleeved on the rotating shaft, then the rotating ring is rotated by an angle, so that the locking cylinder in the rotating ring is just located at the maximum position of the radial gap of the annular cavity, the rotating ring and the locking cylinder can be conveniently installed in the locking cavity together, the poking rod is just located in the diameter direction of the rotating ring, and therefore the poking rod does not form torque on the rotating ring. When the poking rod is rotated towards one side, the rotating disc rotates along with the rotating rod, and at the moment, the telescopic sleeve at the inner end of the poking rod body can form an eccentric acting force on the rotating ring by virtue of the elasticity of the pressure spring, so that the rotating ring is driven to rotate for an angle, and the locking cylinder moves from the maximum radial gap position to the minimum radial gap position of the annular cavity. We can make the cylindrical diameter of locking be greater than the minimum radial space of annular cavity to make the cylindrical outside face of cylinder of locking laminate with the regular hexagon lateral wall of outside locking cavity and the axis of rotation face of cylinder of inboard simultaneously, and the locking cylinder stops in the annular cavity the position between maximum radial space and the minimum radial space, the rotation ring stall this moment. Through reasonable design, the included angle between the rotation direction of the locking cylinder at the joint of the locking cylinder and the locking cavity and the inner side wall of the locking cavity at the joint is smaller than a self-locking angle. For example, if the material of the locking cylinder and the locking truncated cone is steel, and the self-locking angle in the non-lubricated state should be less than 8.5 degrees.

Thus, when we rotate the rotating shaft in the forward direction, the friction force between the rotating shaft and the locking cylinder drives the locking cylinder to move towards the side with the smallest radial gap. The locking cylinder is locked by the inner side wall of the locking concave cavity and the outer side wall of the rotating shaft, so that the rotating shaft cannot rotate. On the contrary, when the rotating shaft rotates reversely, the rotating shaft can drive the locking cylinder to rotate towards one side of the largest radial gap, the locking cylinder at the moment is unlocked, and the rotating shaft can rotate freely, so that the rotating shaft and the locking disc rotate in one direction in a single direction to transmit torque.

It can be understood that when the poke rod is poked forwards, the poke rod gradually swings from an eccentric position deviating from the center of the rotating ring to a radial position passing through the center of the rotating ring, and the rotating ring drives the locking cylinder to move from a position close to the minimum radial gap on one side to a position opposite to the maximum radial gap. After crossing radial position, the poke rod swings to an eccentric position deviating from the center of the rotating circular ring towards the other side, the rotating circular ring drives the locking cylinder to move from the position with the largest radial gap to the position close to the position with the smallest radial gap on the other side for positioning, and the rotating rod and the locking disk form opposite unidirectional rotation to transmit torque. When the original one-way transmission direction needs to be adjusted back again, the poke rod only needs to be poked reversely, and the rotating ring rotates reversely to the original position.

That is, the invention can conveniently control the transmission direction of the one-way transmission structure through one poke rod, so as to be convenient for hooking the insulator on the insulator hanging rack or taking the insulator off from the insulator hanging rack.

Claims (3)

1. A method for hoisting an insulator of a high-voltage transmission line is characterized by comprising the following steps:

a. a hoisting pulley is arranged on a high-voltage transmission line, and an annular hoisting rope which is connected end to end is wound on the hoisting pulley;

b. hooking a ball head of a steel rod piece of a new insulator on an insulator hanging frame which is positioned on an annular lifting rope on one side of a lifting pulley and is close to the ground;

c. hooking a ball head of a steel rod piece of an old insulator detached from the high-voltage transmission line on an insulator hanging frame which is positioned on an annular hanging rope on the other side of a hanging pulley and is close to the hanging pulley;

d. pulling down the annular lifting rope on one side hung with the old insulator until the old insulator gradually descends to be close to the ground, and correspondingly, synchronously lifting the new insulator on the other side to be close to the hoisting pulley;

e. taking down a new insulator from the insulator hanger close to the hoisting pulley, installing the new insulator on a high-voltage transmission line, and taking down an old insulator from the insulator hanger close to the ground;

f. repeating the steps b to e, and completing the hoisting of the new insulator and the old insulator;

the insulator hanging rack comprises a hanging rack body detachably connected to an annular lifting rope, wherein hook holes used for hanging insulators are formed in the hanging rack body, each hook hole comprises a vertically-arranged hook straight hole and a circular placing hole connected to the upper end of the hook straight hole, a locking disc located beside the hook straight hole is arranged on the hanging rack body, a radial locking rod located on the hook hole is arranged on the locking disc, a unidirectional rotation structure capable of controlling the transmission direction is arranged between the locking disc and the hanging rack body, the unidirectional rotation structure comprises a regular-hexagon locking concave cavity arranged on the hanging rack body, a rotatable rotating ring is arranged in the locking concave cavity, six accommodating holes radially penetrating through the inner side wall and the outer side wall of the rotating ring are formed in the rotating ring, the accommodating holes are uniformly distributed in the circumferential direction, locking cylinders are arranged in the accommodating holes, and a rotating shaft is arranged at the center of the locking disc, the center at the locking cavity is equipped with the rotation hole, the axis of rotation rotationally pegs graft in the rotation hole, but articulated on the stores pylon body have elastically flexible poker rod, is equipped with the location breach at the outside edge of rotating ring, and the inner location of poker rod is in the location breach, poker rod makes rotating ring location in one-way locking position, and locking cylinder inboard at this moment pastes and leans on the axis of rotation, and the cylindrical outside of locking pastes and leans on the inside wall of locking cavity.

2. The method according to claim 1, wherein the width of the straight hooking hole is adapted to the diameter of the steel rod, and when the insulator is to be hooked, the ball of the steel rod of the insulator is inserted into the circular insertion hole, the insulator moves downward by its own weight, the steel rod slides down from the circular insertion hole to the straight hooking hole, and the ball of the steel rod is hooked to the lower end of the straight hooking hole.

3. The method according to claim 2, wherein when the insulator is to be hooked to the insulator hanger, the locking disc is first placed in a clockwise rotatable unidirectional insertion state, then the ball of the steel rod of the insulator is inserted into the circular insertion hole, the insulator moves downward by its own weight, the steel rod slides downward from the circular insertion hole to the hooking straight hole, and pushes down a first radial locking rod obliquely straddling the hooking straight hole until the steel rod is separated from the first radial locking rod and stays at the lower end of the hooking straight hole, at this time, the locking disc rotates clockwise by 90 degrees, and a second subsequent radial locking rod obliquely straddles the junction of the hooking straight hole and the circular insertion hole;

when the insulator needs to be taken down from the insulator hanging frame, the locking disc is firstly in a one-way taking-out state capable of rotating anticlockwise, then the insulator is moved upwards, the steel rod piece moves upwards from the hook straight hole to the circular placing hole, and pushes the radial locking rod obliquely crossing the hook straight hole upwards until the steel rod piece is separated from the radial locking rod and stays in the circular placing hole, and at the moment, the insulator can be taken down outwards.

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