CN108069353B

CN108069353B - Special resistance bar for field operation of electric power system

Info

Publication number: CN108069353B
Application number: CN201611009169.9A
Authority: CN
Inventors: 于学超; 王磊; 赵兴亮; 孙晓磊; 李振东; 金阿龙; 王福升; 于冬; 龚建刚; 顾泽林
Original assignee: State Grid Corp of China SGCC; Weifang Power Supply Co of State Grid Shandong Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Weifang Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority date: 2016-11-16
Filing date: 2016-11-16
Publication date: 2020-04-17
Anticipated expiration: 2036-11-16
Also published as: CN108069353A

Abstract

The invention discloses a special resistance bar for field operation of an electric power system, which comprises a base, wherein a locking device for locking the base on a beam at the lower part of an electric power tower is arranged on the base, a thick round pipe is transversely and vertically fixedly arranged on the base, a hoisting rope is wound on the round pipe, the special resistance bar also comprises a pulley which is wound on the upper section of the hoisting rope and is in transmission fit with the hoisting rope, a locking device for locking the pulley on the beam at the upper part of the electric power tower is fixedly arranged at the upper end of the pulley, and an outer locking device and an inner locking device are also. This patent quality is slim and graceful, and convenient to carry can install electric power tower or transmission tower lower part fast, alone can accomplish the work of transferring heavy insulator chain subaerial light, transfers speed stability, controllable, can die the hoist and mount rope lock of below insulator chain when emergency appears, guarantees that insulator chain can not fall ground and cause the accident, and personnel, equipment security are all high.

Description

Special resistance bar for field operation of electric power system

Technical Field

The invention relates to a special resistance bar for field operation of an electric power system.

Background

Insulator strings are commonly used power devices in power supply lines, and structurally, the insulator strings are mainly combined by two or more insulator elements and are used for flexibly suspending assemblies of wires. For suspending and insulating the wires from the tower and the ground. Therefore, in places with electric power transmission lines and transmission towers, insulator strings are bound to be used for connecting the transmission lines and the transmission towers, and the application range is very wide, and the application number is very large.

In order to ensure the reliable operation of the insulator string, not only regular inspection is required, but also regular maintenance of the insulator string is required, and the insulator sheet with problems needs to be replaced. Since the insulator string often contains 20-30 insulating sheets, the weight is large. Because no special replacing tool is provided, at least several people are needed to complete the replacing operation during replacing, and the operation difficulty is very great on the overhead power transmission tower. Particularly, when the insulator string is placed to the ground from the high altitude, once the insulator string slides or loosens hands due to fatigue, the insulator string directly falls to the ground, and therefore ground accessories are easily broken and the insulator string is damaged in an irreparable mode. More seriously, the operators at high altitude are more dangerous if fatigue and other problems occur.

Disclosure of Invention

The invention aims to solve the technical problems that the special resistance bar for field operation of the electric power system is reasonable in structure, light in weight and convenient to carry, can be quickly installed at the lower part of an electric power tower or a power transmission tower, can be used for easily completing the work of placing a heavy insulator string on the ground by one person, is stable and controllable in placing speed, can lock a hoisting rope of the insulator string below in an emergency situation, and ensures that the insulator string cannot fall off the ground to cause accidents, and the safety of personnel and equipment is high.

In order to solve the technical problem, the special resistance bar for the field operation of the electric power system has the structural characteristics that: the base is provided with a locking device for locking the base on a beam at the lower part of the power tower, a thick round pipe is transversely and vertically arranged on the base, a hoisting rope is wound on the round pipe, the pulley is wound on the upper section of the hoisting rope in a transmission fit manner, a locking device for locking the pulley on the beam at the upper part of the power tower is also fixedly arranged at the upper end of the pulley, an outer locking shaft is transversely and vertically arranged on the base, a locking sleeve is rotatably arranged on the outer locking shaft, the outer locking device capable of tightly pressing the hoisting rope at the periphery of the round pipe is arranged on the locking sleeve, an inner locking shaft coaxially arranged is transversely and vertically arranged on the base in the round pipe, a rotary table is rotatably arranged on the inner locking shaft, and the inner locking device for locking the hoisting rope on the round pipe is arranged on the rotary table.

This special resistance thick stick of electric power system field work realizes rational in infrastructure through the double-locking structure of pipe formula friction, the quality is light, and convenient to carry can install electric power tower or transmission tower lower part fast, alone can accomplish the work of transferring heavy insulator chain subaerial easily, transfer speed is stable, controllable, can die the hoist and mount rope lock of below insulator chain when emergency appears, guarantee that insulator chain can not fall ground and cause the accident, personnel, equipment security are all high.

The round tube type friction double-locking structure mainly comprises a base, a round tube, an outer locking shaft, a locking sleeve, an outer locking device, an inner locking shaft, a rotary disc and an inner locking device. The base is a flat plate structure, is a main body framework of the patent, is an installation carrier of other components, and provides installation positions and spaces for the other components. Base one side is equipped with locking device, and the base passes through locking device and installs fast on the crossbeam of electric power tower or transmission tower lower part, realizes the quick installation of this patent promptly. This patent is when the installation is used, and general base face is vertical setting. The round pipe is a round pipe-shaped sleeve, and the round pipe is axially and horizontally arranged and is vertically and fixedly connected with the base. The round pipe mainly has the function of providing a winding and force application carrier for a hoisting rope for hoisting an insulator string. During the actual production, the pipe end still can coaxial rigid coupling have a horn pipe, and the thinner one end of horn pipe docks with the pipe, and the pipe setting is kept away from to the thicker one end of horn pipe. Set up the main objective of horn pipe, be in order to carry on spacingly to the terminal hoist and mount rope of pipe, prevent that hoist and mount rope from the terminal slippage of pipe. During actual manufacturing, the outer end of the outer locking cover is correspondingly and fixedly provided with a conical arc sheet corresponding to the horn tube, the conical arc sheet is matched with the inside and the outside of the horn tube, the hoisting rope is limited in the arc-shaped channel, and the conical arc sheet has the function of guaranteeing reliable work. When preventing insulator chain under actual, the pedestal mounting is in electric power tower lower part, and the pulley mounting is on electric power tower upper portion, and the hoist and mount rope twines between pulley and pipe. The upper section of the hoisting rope is connected with the insulator string, and the lower end of the hoisting rope is held by an operator. The second function of the round tube is to counteract the gravity of the insulator string when the insulator string descends through the friction force between the round tube and the hoisting rope. Obviously, the more the number of turns of the hoisting rope wound on the round pipe, the larger the friction force of the hoisting rope receiving the round pipe is, the larger the gravity capable of overcoming the insulator string is, and therefore the number of turns of the hoisting rope can be determined according to the actual weight of the insulator string. According to stress analysis, the gravity of the insulator string is equal to the sum of the friction force between the circular tube and the hoisting rope and the pulling force of an operator. Obviously, the operator can control the sliding speed of the hoisting rope, namely the lowering speed of the insulator string by controlling the pulling force of the hoisting rope. In detail, when the operator applies a small pulling force, the gravity of the insulator string is greater than the friction force between the circular tube and the hoisting rope and the pulling force applied by the operator, and the insulator string begins to be slowly lowered. When the pulling force is continuously reduced by the operator, the insulator string is transferred more and more quickly. When an operator applies a large pulling force, the gravity of the insulator string is smaller than the friction force between the circular tube and the hoisting rope and the pulling force applied by the operator, and the insulator string starts to slow down slowly until the insulator string stops. When the friction force between the circular tube and the hoisting rope is reduced due to the fact that accidents occur such as dampness or rain, when an operator applies full force and cannot reduce the lowering speed of the insulator string, the outer locking device and the inner locking device can be triggered to act respectively through the locking sleeve sleeved on the outer locking shaft and the rotary disc sleeved on the inner locking shaft to emergently suspend the insulator string. When outer locking device and interior locking device were triggered, both will be in the same place hoist and mount rope with the relative locking of pipe, hoist and mount rope just can't rotate relatively the pipe like this, just also can't realize transferring of insulator chain, play the effect of emergency protection. Therefore, when the insulator string placing device is used, heavy insulator strings can be easily controlled and stably placed by only one ground person, and operation is very simple. Even when special conditions appear, also can realize safety protection through outer locking device and interior locking device, fundamentally has improved the use reliability and the security of this patent, has effectively ensured personal and equipment safety.

During the actual production, the pipe end still can coaxial rigid coupling have a horn pipe, and the thinner one end of horn pipe docks with the pipe, and the pipe setting is kept away from to the thicker one end of horn pipe. Set up the main objective of horn pipe, be in order to carry on spacingly to the terminal hoist and mount rope of pipe, prevent that hoist and mount rope from the terminal slippage of pipe. During actual manufacturing, the outer end of the outer locking cover is correspondingly and fixedly provided with a conical arc sheet corresponding to the horn tube, the conical arc sheet is matched with the inside and the outside of the horn tube, the hoisting rope is limited in the arc-shaped channel, and the conical arc sheet has the function of guaranteeing reliable work.

As the improvement, outer locking device is including setting firmly the outer locking cover in lock sleeve one side, and outer locking cover is half buckle cover arc board in the pipe outside, is equipped with the arc passageway that the hoist and mount rope passes through between outer locking cover inner wall and the pipe outer wall, and the lock sleeve opposite side has set firmly the pull ring through the lever, and the pull ring is connected with pedal ring through the stay cord.

The external locking device mainly comprises an external locking cover, a channel, a lever, a pull ring, a pull rope, a pedal plate and other structures. Wherein, outer locking cover and lever are fixed respectively in the both sides of lock sleeve, for example left side and right side. Therefore, the outer locking cover and the lever form a hinged installation relation with the base through the locking sleeve and the outer locking shaft, and when the tail end of the lever is driven to move, the lever rotates around the outer locking shaft under the support of the locking sleeve, so that the aim of driving the outer locking cover to swing is fulfilled. In this patent, outer locking cover is located pipe below and partial right side, and the purpose of design like this is for the hoist and mount rope upper segment on the pipe of convenient winding upwards extend to be connected with the pulley, and hoist and mount rope hypomere of also being convenient for extends to left side or below, has greatly improved the simple operation nature, and is very convenient. In this patent, the outer locking cover is an arc plate that is half-buckled to cover the outside of the round tube. Under the natural state, the outer locking cover and the circular tube are coaxially arranged, and an arc-shaped gap, namely an arc-shaped channel, is formed between the inner wall of the outer locking cover and the outer wall of the circular tube. The channel is a space through which the hoisting rope passes, and is far wider than the winding thickness of the hoisting rope in a natural state, so that the hoisting rope can slide smoothly. In this patent, the lever end has set firmly the pull ring, and the pull ring passes through the stay cord downwardly extending and is connected with pedal ring, therefore lever, pull ring, stay cord and pedal ring constitute transmission fit relation in proper order. In practical use, the base is generally arranged at a position where the pedal ring is slightly higher than the ground and the downward stepping stroke of the pedal ring can drive the outer locking cover to press the hoisting rope on the circular tube. In the work, when stepping on pedal ring, pedal ring will be through stay cord and pull ring pulling lever lower hem, and the lever can prize the outer lock cover upper hem through lock sleeve and outer locking shaft, and the convex passageway can narrow down this moment, and outer lock cover inner wall can take place the friction with the hoist and mount rope. When the pedal ring is stepped on to the bottom, the channel between the outer locking cover and the round pipe is narrowest, the hoisting rope is fixedly locked on the round pipe, the locking of the hoisting rope and the safe positioning of the insulator string are realized, and the working safety is greatly guaranteed. For convenience of description, this state is referred to as a locked state.

As an improvement, the inner wall of the outer locking cover is uniformly provided with locking grooves which are coaxial with the round pipe, and rubber strips are arranged in the locking grooves.

The locking grooves are uniformly distributed on the inner wall of the outer locking cover, the rubber strips are arranged in the locking grooves, the main purpose is to increase the friction force of the lifting rope in the locking state, and the rubber strips are used for applying protection to the lifting rope by means of elasticity of the rubber strips. In this patent, locking groove and rubber strip all are the rectangular form with the coaxial setting of pipe, set up like this and guarantee to detain all hoist and mount ropes in the cover scope and all can receive the friction and the protection of rubber strip, have also increased the reliability of locking.

As a preferred embodiment, the inner locking device comprises a plurality of locking slideways which are uniformly arranged on the circular pipe in a surrounding manner and penetrate through the inside and the outside of the circular pipe, locking plates are inserted into the locking slideways, the inner ends of the locking plates are hinged to the periphery of the rotary table through ring shafts, linkage slideways which penetrate through the inside and the outside of the circular pipe are further arranged on the circular pipe, linkage rods are inserted into the linkage slideways, the inner ends of the linkage rods are hinged to the periphery of the rotary table through linkage shafts, the outer ends of the linkage rods are hinged to the inner wall of the outer locking cover through driving shafts, the outer edges of the locking plates are not inserted into the locking slideways when the outer locking cover is far away from.

The inner locking device mainly comprises a locking slideway, a locking plate, a ring shaft, a linkage slideway, a linkage rod, a linkage hinge shaft, a driving shaft and other structures. Wherein, the locking slide is evenly arranged on the circular tube in a surrounding manner and is arranged by penetrating through the inner side and the outer side of the circular tube. The locking slide way is arranged in a strip shape and extends axially along the round tube. The locking plate and the locking slideway are in sliding insertion connection, and the locking plate is also a long-strip-shaped flat plate which is arranged along the locking slideway in an extending mode. The inner end of the locking plate is hinged on the periphery of the turntable through the ring shaft, so that the locking plate can swing around the ring shaft relative to the turntable. In a natural state, the outer edge of the locking plate is submerged into the locking slideway, i.e. the locking slideway is not exposed. And when the locking plate is in a natural state, the locking plate is obliquely inserted into the locking slideway, namely, an included angle exists between the insertion direction of the locking plate and the radial direction of the circular tube. In this patent, the locking plate can either be articulated at the periphery of the turntable by a long ring shaft or by two or more ring shafts. The round tube is also provided with a linkage slideway, the linkage slideway is arranged by penetrating through the inner side and the outer side of the round tube and is arranged towards the middle part of the inner wall of the outer locking cover. A linkage rod is inserted in the linkage slide way in a sliding mode, the inner end, extending out of the circular tube, of the linkage rod is hinged to the periphery of the rotary table through a linkage shaft, and the outer end, extending out of the circular tube, of the linkage rod is correspondingly hinged to the middle of the inner wall of the outer locking cover through a driving shaft. Because the driving shaft, the linkage shaft, the ring shaft and the turntable are coaxially arranged with the outer locking shaft, the locking cover forms a transmission matching relation with the turntable and the locking plate through the linkage rod. When this patent was switched to locking state by natural state, also when stepping on pedal ring, outer locking cover was close to the pipe, and convex passageway narrows down, and the hoist and mount rope that begins to rub slows down insulator chain and transfers speed. Meanwhile, the outer locking cover drives the turntable to rotate at a small angle through the linkage rod, and then the turntable drives the locking plate to move synchronously. And the rotation direction of the drive plate drive rotating disc is right, so that the locking plate slides towards the direction extending out of the locking slideway, the outer edge of the locking plate can slide out of the locking slideway, and a plurality of convex ribs are formed on the periphery of the circular tube. Therefore, the friction force between the circular tube and the hoisting rope is increased, the hoisting rope wound on the circular tube is fixed and clamped, the cross section of the arc-shaped channel is further reduced, and the hoisting rope is more difficult to pass through. Furthermore, the locking plate outside is along the pipe axial extension setting with the rubber strip all, consequently, and the cooperation between them can make convex passageway be the wave of height fluctuation, has strengthened the locking force of this patent to the hoist and mount rope greatly, and is more reliable to insulator chain's transfer location. The insulator string is lowered normally. Therefore, this patent is when meetting special circumstances, if play the light rain suddenly and lead to pipe and hoist and mount rope frictional force to reduce, perhaps ground operating personnel has tired the needs rest, perhaps ground operating personnel misoperation leads to hoist and mount rope from the hand slippage, and ground operating personnel need only step on pedal ring with the foot this moment, can realize insulator chain's quick location, easy operation, safe and reliable. Of course, the ground operator can also completely release the lower section of the hoisting rope, and only controls the sliding of the hoisting rope in a pedal ring interval stepping mode, so that the insulator string can be lowered in a pause-type mode. Ground operating personnel can also make outer locking device and interior locking device reach critical locking state through the mode of controlling pedal ring and stepping on the angle down, and the hoist and mount rope is not locked totally this moment, and it is only slower to slide, has also realized "critical formula of insulator chain slowly transfers".

As an improvement, the outer edge of the locking plate is wedge-shaped.

The outer edge of the locking plate is set to be wedge-shaped, so that the friction force between the outer edge of the locking plate and the hoisting rope is increased, and the locking effect is improved.

As an improvement, a conical rubber sleeve with a thin upper end and a thick lower end is sleeved on the lower section of the hoisting rope, and a rope buckle is tied on the hoisting rope below the conical rubber sleeve.

The conical rubber sleeve is arranged at the lower section of the hoisting rope, and the rope buckle is tied on the hoisting rope, so that the hoisting rope can be conveniently held by ground operators, and is mainly used under the condition that the outer locking device and the inner locking device are out of order under the very special condition. When the outer locking device and the inner locking device are out of order, the rapidly-placed insulator string can drive the hoisting rope to move rapidly, and finally, the conical rubber sleeve at the tail end of the hoisting rope can be brought into the arc-shaped channel between the outer locking decoration and the circular tube. Because the conical rubber sleeve is conical, the upper end is thin and is easy to enter the channel, and the lower end is thick and is not easy to pass through the channel. The conical rubber sleeve that the interval set up like this can constantly slow down insulator chain's speed of transferring, and the power of transferring that directly ends insulator chain is not enough to take the conical rubber sleeve of card income passageway out of the passageway, has also realized insulator chain's safe positioning.

As an implementation mode, the base is provided with a conical hole and a conical strip hole, a conical bolt is inserted in the conical hole and the conical strip hole and can slide along the conical strip hole, the locking device is fixedly arranged at the end part of the conical bolt, the cross beam is an angle steel, the locking device comprises a positioning plate fixedly arranged at the bottom of the conical bolt, an inner threaded hole extending horizontally in the axial direction is arranged in the positioning plate, the locking device further comprises a clamping plate, a clamping hole is arranged at the upper part of the clamping plate, a clamping bolt matched with the inner threaded hole in a screwed mode is inserted in the clamping hole, an upper hook plate matched with a horizontal plate hook of the angle steel is fixedly arranged at the upper end of the clamping plate, a lower hook plate matched with a vertical plate hook of the angle steel is fixedly arranged at the lower end of the clamping plate, and an end part of

In this patent, be equipped with a plurality of butt joint holes of being connected with locking device on the base, mainly include circular cone hole and circular cone strip hole, wherein circular cone strip hole is the horizontal elongated strip hole of circular cone hole size. Whether the hole is a conical hole or a conical strip hole, the longitudinal section of the hole is a conical hole with a narrow end and a wide end. Conical bolts are inserted in the conical holes and the conical strip holes, one end of each conical bolt is fixedly provided with a conical block which is completely inserted and matched with the conical hole, and the other end of each conical bolt is correspondingly and fixedly connected with the locking device. The conical bolt is shaped like a bolt, although the name is bolt, but there is no threaded connection fit. After the conical plugging block of the conical bolt is inserted into the conical hole and the conical strip hole, the conical plugging block is completely immersed into the conical hole or the conical strip hole, and the end face of the conical plugging block is flush with the base, so that the hoisting rope in movement cannot be wound around the base to be adversely affected. The conical bolt can only rotate in the conical hole, so that the mounting angle of the locking device can be freely adjusted. The conical bolt can rotate in the conical strip hole and can freely slide along the length direction of the conical strip hole, so that the mounting angle of the locking device can be adjusted, the mounting position of the locking device can be adjusted, the adaptability is strong, and the quick mounting is realized.

The angle steel is the most common hardware fitting structure for the cross beam of the power tower, and is widely applied to the power tower. To this kind of angle steel crossbeam, this patent has designed corresponding locking device. The locking device mainly comprises a positioning plate arranged at the bottom of the conical bolt, a clamping plate arranged at the end part of the positioning plate and a clamping bolt for positioning the clamping plate on the positioning plate. In practical use, the present invention generally has at least two sets of locking devices, which are respectively located at the left and right sides, and the following description will take the locking device at the right side as an example. An inner threaded hole is arranged in the positioning plate, and the axial direction of the inner threaded hole is horizontally arranged. The inner threaded hole has two ports, which are called a left port and a right port respectively for convenience of description, wherein the left port is an inner port, i.e., a port facing the taper pipe, and the right port is an outer port, i.e., a port facing away from the taper pipe. The clamping plate is provided with a clamping hole, and the thread section of the clamping bolt penetrates through the clamping hole and then is in threaded connection with the inner screw hole. The upper end and the lower end of the clamping plate are respectively and fixedly provided with an upper hook plate and a lower hook plate, and the upper hook plate and the lower hook plate are mainly used for being in limit fit with the angle iron hook. In this patent, the hole setting of clamping is on the upper portion of clamping board, consequently under natural state, the length that lower hook plate place section will be longer than the upper hook plate place section. Set up like this, mainly be in order to make this patent can cooperate, adapt to different installation angle's angle steel, also improve the commonality of this patent promptly. The angle steel has two mutually perpendicular faces, and for convenience of description, the horizontally arranged face of the angle steel is called a horizontal plate, and the vertically arranged face of the angle steel is called a vertical plate. When the right side angle steel of this patent of installation is that vertical board is pressed close to the clamping plate, then only need under natural state screw up the clamping bolt can. At the moment, the lower hook plate can gradually approach to the lower end of the vertical plate along with the tightening of the clamping bolt, and when the clamping bolt is tightened, the lower hook plate is completely clamped to the lower end of the vertical plate, so that the positioning plate, the clamping plate and the lower hook plate can semi-enclose the angle steel from the right side. Similarly, the left locking device can semi-surround the left angle steel from the left side, so that the two locking devices are clamped together with the two angle steels from the left side and the right side respectively, and the purpose of fixing the novel angle steel is achieved. When the right angle steel of this patent of installation is the horizontal plate, need clamp the board and rotate ninety degrees around clamping the bolt, also shift from top to bottom upper hook plate and lower hook plate. Because the section of the lower hook plate is shorter, the lower hook plate can just correspond to the angle steel horizontal plate. That is, when locking clamped the bolt, the upside down hook plate will with horizontal plate hook spacing fit, also the locating plate, clamped the board and the upside down hook plate through the diagonal steel flat from the right side semi-surround realized whole right side angle steel right side semi-surround. Similarly, the left locking device can realize half-surrounding of the left side of the whole left side angle steel from half-surrounding of the left side through the diagonal steel flat plate, and the left locking device also plays a role in clamping the left side angle steel and the right side angle steel together, namely plays a role in locking and positioning the steel plate. The end part of the clamping bolt penetrating through the inner threaded hole is screwed with an end part nut, the end part nut mainly plays a role in reinforcing the locking clamping bolt, namely, the locking clamping plate is reinforced, and the locking effect of the locking device is reinforced.

In conclusion, the special resistance bar for field operation of the electric power system with the structure is reasonable in structure, light in weight and convenient to carry, can be quickly installed on the lower portion of an electric power tower or a power transmission tower, one person can easily finish the work of lowering a heavy insulator string on the ground, the lowering speed is stable and controllable, a lifting rope of the insulator string below can be locked in case of emergency, the insulator string is guaranteed not to fall on the ground to cause accidents, and the safety of personnel and equipment is high.

Drawings

The invention is described in further detail with reference to the accompanying drawings:

FIG. 1 is a schematic view of the overall structure of the patent;

FIG. 2 is a schematic view of the internal locking mechanism in its natural state;

FIG. 3 is a schematic structural view of the locking state of the inner locking device;

FIG. 4 is a schematic structural diagram of a first locking matching mode of two locking devices;

FIG. 5 is a schematic structural view of a second locking matching mode of two locking devices;

FIG. 6 is a schematic structural diagram of the locking device in locking fit with the angle steel vertical plate;

fig. 7 is a schematic structural diagram of the locking device and the angle steel horizontal plate in locking fit.

Detailed Description

As shown in the figure, this special resistance thick stick of electric power system field work includes base 1, be equipped with on the base with locking device 2 of base locking on electric power tower lower part crossbeam, horizontal perpendicular has set firmly thicker pipe 3 on the base, the winding has hoist and mount rope 4 on the pipe, still include with hoist and mount rope upper segment winding transmission complex pulley 5, the pulley upper end has also set firmly locking device with pulley locking on electric power tower upper portion crossbeam, horizontal perpendicular has set firmly outer locking shaft 6 on the base, it is equipped with locking cover 7 to rotate the cover on the outer locking shaft, install on the locking cover and compress tightly the outer locking device 8 in the pipe periphery with hoist and mount rope, still horizontal perpendicular set firmly the interior locking shaft 9 of coaxial setting on the base in the pipe, interior locking shaft rotates and installs carousel 11, be equipped with on carousel and the pipe and lock the interior locking device 12 of hoist and mount rope locking on the pipe. The special resistance bar for field operation of the electric power system mainly comprises a base, a circular tube, an outer locking shaft, a locking sleeve, an outer locking device, an inner locking shaft, a rotary table and an inner locking device. The base is a flat plate structure, is a main body framework of the patent, is an installation carrier of other components, and provides installation positions and spaces for the other components. Base one side is equipped with locking device, and the base passes through locking device and installs fast on the crossbeam of electric power tower or transmission tower lower part, realizes the quick installation of this patent promptly. This patent is when the installation is used, and general base face is vertical setting. The round pipe is a round pipe-shaped sleeve, and the round pipe is axially and horizontally arranged and is vertically and fixedly connected with the base. The round pipe mainly has the function of providing a winding and force application carrier for a hoisting rope for hoisting an insulator string. When the insulator string is actually arranged below the power tower, the base is arranged on the lower portion of the power tower, the pulley is arranged on the upper portion of the power tower, and the hoisting rope is wound between the pulley and the round pipe. The upper section of the hoisting rope is connected with the insulator string, and the lower end of the hoisting rope is held by an operator. The second function of the round tube is to counteract the gravity of the insulator string when the insulator string descends through the friction force between the round tube and the hoisting rope. Obviously, the more the number of turns of the hoisting rope wound on the round pipe, the larger the friction force of the hoisting rope receiving the round pipe is, the larger the gravity capable of overcoming the insulator string is, and therefore the number of turns of the hoisting rope can be determined according to the actual weight of the insulator string. According to stress analysis, the gravity of the insulator string is equal to the sum of the friction force between the circular tube and the hoisting rope and the pulling force of an operator. Obviously, the operator can control the sliding speed of the hoisting rope, namely the lowering speed of the insulator string by controlling the pulling force of the hoisting rope. In detail, when the operator applies a small pulling force, the gravity of the insulator string is greater than the friction force between the circular tube and the hoisting rope and the pulling force applied by the operator, and the insulator string begins to be slowly lowered. When the pulling force is continuously reduced by the operator, the insulator string is transferred more and more quickly. When an operator applies a large pulling force, the gravity of the insulator string is smaller than the friction force between the circular tube and the hoisting rope and the pulling force applied by the operator, and the insulator string starts to slow down slowly until the insulator string stops. When the friction force between the circular tube and the hoisting rope is reduced due to the fact that accidents occur such as dampness or rain, when an operator applies full force and cannot reduce the lowering speed of the insulator string, the outer locking device and the inner locking device can be triggered to act respectively through the locking sleeve sleeved on the outer locking shaft and the rotary disc sleeved on the inner locking shaft to emergently suspend the insulator string. When outer locking device and interior locking device were triggered, both will be in the same place hoist and mount rope with the relative locking of pipe, hoist and mount rope just can't rotate relatively the pipe like this, just also can't realize transferring of insulator chain, play the effect of emergency protection. Therefore, when the insulator string placing device is used, heavy insulator strings can be easily controlled and stably placed by only one ground person, and operation is very simple. Even when special conditions appear, also can realize safety protection through outer locking device and interior locking device, fundamentally has improved the use reliability and the security of this patent, has effectively ensured personal and equipment safety.

In this patent, outer locking device is including setting firmly the outer locking cover 13 in lock sleeve one side, and outer locking cover is half buckle cover arc board in the pipe outside, is equipped with the arc passageway 14 that the hoist and mount rope passes through between outer locking cover inner wall and the pipe outer wall, and the lock sleeve opposite side has set firmly pull ring 16 through lever 15, and the pull ring is connected with pedal ring 18 through stay cord 17. The external locking device mainly comprises an external locking cover, a channel, a lever, a pull ring, a pull rope, a pedal plate and other structures. Wherein, outer locking cover and lever are fixed respectively in the both sides of lock sleeve, for example left side and right side. Therefore, the outer locking cover and the lever form a hinged installation relation with the base through the locking sleeve and the outer locking shaft, and when the tail end of the lever is driven to move, the lever rotates around the outer locking shaft under the support of the locking sleeve, so that the aim of driving the outer locking cover to swing is fulfilled. In this patent, outer locking cover is located pipe below and partial right side, and the purpose of design like this is for the hoist and mount rope upper segment on the pipe of convenient winding upwards extend to be connected with the pulley, and hoist and mount rope hypomere of also being convenient for extends to left side or below, has greatly improved the simple operation nature, and is very convenient. In this patent, the outer locking cover is an arc plate that is half-buckled to cover the outside of the round tube. Under the natural state, the outer locking cover and the circular tube are coaxially arranged, and an arc-shaped gap, namely an arc-shaped channel, is formed between the inner wall of the outer locking cover and the outer wall of the circular tube. The channel is a space through which the hoisting rope passes, and is far wider than the winding thickness of the hoisting rope in a natural state, so that the hoisting rope can slide smoothly. In this patent, the lever end has set firmly the pull ring, and the pull ring passes through the stay cord downwardly extending and is connected with pedal ring, therefore lever, pull ring, stay cord and pedal ring constitute transmission fit relation in proper order. In practical use, the base is generally arranged at a position where the pedal ring is slightly higher than the ground and the downward stepping stroke of the pedal ring can drive the outer locking cover to press the hoisting rope on the circular tube. In the work, when stepping on pedal ring, pedal ring will be through stay cord and pull ring pulling lever lower hem, and the lever can prize the outer lock cover upper hem through lock sleeve and outer locking shaft, and the convex passageway can narrow down this moment, and outer lock cover inner wall can take place the friction with the hoist and mount rope. When the pedal ring is stepped on to the bottom, the channel between the outer locking cover and the round pipe is narrowest, the hoisting rope is fixedly locked on the round pipe, the locking of the hoisting rope and the safe positioning of the insulator string are realized, and the working safety is greatly guaranteed. For convenience of description, this state is referred to as a locked state.

In this patent, the equipartition has the locking groove 19 with the coaxial setting of pipe on the outer locking cover inner wall, installs rubber strip 20 in the locking groove. The locking grooves are uniformly distributed on the inner wall of the outer locking cover, the rubber strips are arranged in the locking grooves, the main purpose is to increase the friction force of the lifting rope in the locking state, and the rubber strips are used for applying protection to the lifting rope by means of elasticity of the rubber strips. In this patent, locking groove and rubber strip all are the rectangular form with the coaxial setting of pipe, set up like this and guarantee to detain all hoist and mount ropes in the cover scope and all can receive the friction and the protection of rubber strip, have also increased the reliability of locking.

In this embodiment, interior locking device includes that even ring establishes a plurality of locking slide 21 outside the link up pipe on the pipe, locking slide interpolation has the locking plate 22, the locking plate inner articulates in the carousel periphery through ring axle 23, still be equipped with link slide 24 that link up inside and outside on the pipe, link slide interpolation has the linkage stick 25, link stick inner articulates in the carousel periphery through universal driving shaft 26, the linkage stick outer end articulates on outer locking cover inner wall through drive shaft 27, the locking plate outer fringe is submerged in the locking slide when outer locking cover keeps away from the pipe, the locking plate outer fringe stretches out the locking slide when outer locking cover is close to the pipe. The inner locking device mainly comprises a locking slideway, a locking plate, a ring shaft, a linkage slideway, a linkage rod, a linkage hinge shaft, a driving shaft and other structures. Wherein, the locking slide is evenly arranged on the circular tube in a surrounding manner and is arranged by penetrating through the inner side and the outer side of the circular tube. The locking slide way is arranged in a strip shape and extends axially along the round tube. The locking plate and the locking slideway are in sliding insertion connection, and the locking plate is also a long-strip-shaped flat plate which is arranged along the locking slideway in an extending mode. The inner end of the locking plate is hinged on the periphery of the turntable through the ring shaft, so that the locking plate can swing around the ring shaft relative to the turntable. In a natural state, the outer edge of the locking plate is submerged into the locking slideway, i.e. the locking slideway is not exposed. And when the locking plate is in a natural state, the locking plate is obliquely inserted into the locking slideway, namely, an included angle exists between the insertion direction of the locking plate and the radial direction of the circular tube. In this patent, the locking plate can either be articulated at the periphery of the turntable by a long ring shaft or by two or more ring shafts. The round tube is also provided with a linkage slideway, the linkage slideway is arranged by penetrating through the inner side and the outer side of the round tube and is arranged towards the middle part of the inner wall of the outer locking cover. A linkage rod is inserted in the linkage slide way in a sliding mode, the inner end, extending out of the circular tube, of the linkage rod is hinged to the periphery of the rotary table through a linkage shaft, and the outer end, extending out of the circular tube, of the linkage rod is correspondingly hinged to the middle of the inner wall of the outer locking cover through a driving shaft. Because the driving shaft, the linkage shaft, the ring shaft and the turntable are coaxially arranged with the outer locking shaft, the locking cover forms a transmission matching relation with the turntable and the locking plate through the linkage rod. When this patent was switched to locking state by natural state, also when stepping on pedal ring, outer locking cover was close to the pipe, and convex passageway narrows down, and the hoist and mount rope that begins to rub slows down insulator chain and transfers speed. Meanwhile, the outer locking cover drives the turntable to rotate at a small angle through the linkage rod, and then the turntable drives the locking plate to move synchronously. And the rotation direction of the drive plate drive rotating disc is right, so that the locking plate slides towards the direction extending out of the locking slideway, the outer edge of the locking plate can slide out of the locking slideway, and a plurality of convex ribs are formed on the periphery of the circular tube. Therefore, the friction force between the circular tube and the hoisting rope is increased, the hoisting rope wound on the circular tube is fixed and clamped, the cross section of the arc-shaped channel is further reduced, and the hoisting rope is more difficult to pass through. Furthermore, the locking plate outside is along the pipe axial extension setting with the rubber strip all, consequently, and the cooperation between them can make convex passageway be the wave of height fluctuation, has strengthened the locking force of this patent to the hoist and mount rope greatly, and is more reliable to insulator chain's transfer location. The insulator string is lowered normally. Therefore, this patent is when meetting special circumstances, if play the light rain suddenly and lead to pipe and hoist and mount rope frictional force to reduce, perhaps ground operating personnel has tired the needs rest, perhaps ground operating personnel misoperation leads to hoist and mount rope from the hand slippage, and ground operating personnel need only step on pedal ring with the foot this moment, can realize insulator chain's quick location, easy operation, safe and reliable. Of course, the ground operator can also completely release the lower section of the hoisting rope, and only controls the sliding of the hoisting rope in a pedal ring interval stepping mode, so that the insulator string can be lowered in a pause-type mode. Ground operating personnel can also make outer locking device and interior locking device reach critical locking state through the mode of controlling pedal ring and stepping on the angle down, and the hoist and mount rope is not locked totally this moment, and it is only slower to slide, has also realized "critical formula of insulator chain slowly transfers".

In this patent, the outer edge of the locking plate is wedge-shaped. The outer edge of the locking plate is set to be wedge-shaped, so that the friction force between the outer edge of the locking plate and the hoisting rope is increased, and the locking effect is improved.

In this embodiment, a conical rubber sleeve 28 with a thin upper end and a thick lower end is sleeved on the lower section of the hoisting rope, and a rope fastener 29 is tied on the hoisting rope below the conical rubber sleeve. The conical rubber sleeve is arranged at the lower section of the hoisting rope, and the rope buckle is tied on the hoisting rope, so that the hoisting rope can be conveniently held by ground operators, and is mainly used under the condition that the outer locking device and the inner locking device are out of order under the very special condition. When the outer locking device and the inner locking device are out of order, the rapidly-placed insulator string can drive the hoisting rope to move rapidly, and finally, the conical rubber sleeve at the tail end of the hoisting rope can be brought into the arc-shaped channel between the outer locking decoration and the circular tube. Because the conical rubber sleeve is conical, the upper end is thin and is easy to enter the channel, and the lower end is thick and is not easy to pass through the channel. The conical rubber sleeve that the interval set up like this can constantly slow down insulator chain's speed of transferring, and the power of transferring that directly ends insulator chain is not enough to take the conical rubber sleeve of card income passageway out of the passageway, has also realized insulator chain's safe positioning.

In the patent, a conical hole and a conical strip hole are formed in the base, a conical bolt is inserted into the conical hole and the conical strip hole and can slide along the conical strip hole, and the locking device is fixedly arranged at the end part of the conical bolt.

In this embodiment, the cross beam is an angle steel 30, the locking device includes a positioning plate 31 fixedly arranged at the bottom of the conical bolt, an inner screw hole 32 extending axially and horizontally is arranged in the positioning plate 31, the locking device further includes a clamping plate 33, a clamping hole 34 is arranged at the upper part of the clamping plate 33, a clamping bolt 35 in threaded fit with the inner screw hole 32 is inserted in the clamping hole 34, an upper hook plate 37 in hooked fit with a horizontal plate 36 of the angle steel 30 is fixedly arranged at the upper end of the clamping plate 33, a lower hook plate 39 in hooked fit with a vertical plate 38 of the angle steel 30 is fixedly arranged at the lower end of the clamping plate 33, and an end nut 40 is screwed on the end of the clamping bolt 35 penetrating through the inner screw hole 32.

Claims

1. A special resistance bar for field operation of an electric power system is characterized by comprising a base (1), wherein a locking device (2) for locking the base (1) on a beam (10) at the lower part of an electric power tower is arranged on the base (1), a thick round tube (3) is transversely and vertically fixed on the base, a hoisting rope (4) is wound on the round tube, the special resistance bar also comprises a pulley (5) which is wound on the upper section of the hoisting rope and is in transmission fit with the hoisting rope, a locking device (2) for locking the pulley on the beam (10) at the upper part of the electric power tower is also fixedly arranged at the upper end of the pulley (5), an outer locking shaft (6) is transversely and vertically fixed on the base (1), a locking sleeve (7) is rotatably sleeved on the outer locking shaft, an outer locking device (8) capable of tightly pressing the hoisting rope on the periphery of the round tube is arranged on the locking sleeve, an inner locking shaft (, a rotary table (11) is rotatably arranged on the inner locking shaft, and an inner locking device (12) for locking the hoisting rope on the round pipe is arranged on the rotary table (11) and the round pipe; the outer locking device (8) comprises an outer locking cover (13) fixedly arranged on one side of the locking sleeve, the outer locking cover is an arc plate which is covered on the outer side of the circular pipe in a half-buckling manner, an arc-shaped channel (14) through which a hoisting rope passes is arranged between the inner wall of the outer locking cover and the outer wall of the circular pipe, the other side of the locking sleeve is fixedly provided with a pull ring (16) through a lever (15), and the pull ring (16) is connected with a pedal ring (18) through a pull rope (17); the base (1) is provided with a conical hole and a conical strip hole, a conical bolt is inserted in the conical hole and the conical strip hole and can slide along the conical strip hole, the locking device is fixedly arranged at the end part of the conical bolt, the cross beam (10) is an angle steel (30), the locking device comprises a positioning plate (31) fixedly arranged at the bottom of a conical bolt, an inner threaded hole (32) extending in the axial direction in the horizontal direction is formed in the positioning plate (31), a clamping plate (33) is further included, a clamping hole (34) is formed in the upper portion of the clamping plate (33), a clamping bolt (35) matched with the inner threaded hole (32) in a threaded mode is inserted in the clamping hole (34), an upper hook plate (37) matched with a horizontal plate (36) of an angle steel (30) in a hook mode is fixedly arranged at the upper end of the clamping plate (33), a lower hook plate (39) matched with a vertical plate (38) of the angle steel (30) in a hook mode is fixedly arranged at the lower end of the clamping plate (33), and an end portion, penetrating through the inner threaded hole (32), of the clamping bolt (35).

2. The special resistance bar for field operation of the electric power system as claimed in claim 1, which is characterized in that: the inner wall of the outer locking cover is uniformly provided with locking grooves (19) which are coaxial with the round pipe, and rubber strips (20) are arranged in the locking grooves.

3. The special resistance bar for field operation of the electric power system as claimed in claim 1 or 2, which is characterized in that: interior locking device (12) establish a plurality of locking slide (21) inside and outside the link up pipe on the pipe including even ring, locking slide interpolation is equipped with locking plate (22), locking plate the inner articulates in the carousel periphery through ring axle (23), still be equipped with link up inside and outside linkage slide (24) on the pipe, linkage slide interpolation is equipped with linkage stick (25), linkage stick the inner articulates in the carousel periphery through universal driving shaft (26), linkage stick outer end is articulated on outer locking cover inner wall through drive shaft (27), locking plate outer border is submerged locking slide when outer locking cover keeps away from the pipe, locking plate outer border stretches out locking slide when outer locking cover is close to the pipe.

4. The special resistance bar for field operation of the electric power system as claimed in claim 3, which is characterized in that: the outer edge of the locking plate is wedge-shaped.

5. The special resistance bar for field operation of the electric power system as claimed in claim 4, which is characterized in that: the lower section of the hoisting rope is sleeved with a conical rubber sleeve (28) with a thin upper end and a thick lower end, and a rope buckle (29) is tied on the hoisting rope below the conical rubber sleeve.