CN107658785A - The pillar insulator quick replacement device of leading screw driving - Google Patents

Abstract

The invention discloses a fast replacement device for column insulators driven by a lead screw, which comprises a fixing base and an insulating support. The fixing base is provided with a lifting mechanism, and the lifting mechanism includes a fixed shaft, a lifting sleeve and a Lifting seat, the fixed shaft is vertically arranged and fixed with the fixed seat, the fixed shaft has a lead screw section, the lifting sleeve is provided with an internal thread threadedly connected with the screw mandrel section, and the lifting seat has an inner cylinder body, a bearing is provided between the inner cylindrical body and the lifting sleeve, the lower part of the lifting sleeve is connected with a ratchet wrench that drives the lifting sleeve to rotate, and the lifting sleeve is relatively fixed during rotation. The shaft lifts and drives the lifting seat to rise during the rising process, and the lifting seat is connected with the insulating support and drives the insulating support to rise and fall. The invention can easily replace the simple insulation bracket of the column insulator with electricity, not only can effectively shorten the emergency repair time of electricity, but also can greatly reduce the operation cost.

Description

Screw driven post insulator quick change device

technical field

The invention relates to an electric power tool, in particular to an insulator replacement tool.

Background technique

At present, insulator arm trucks are routinely used to replace post insulators with electricity, and a small crane is used to lift the wires, and then the post insulators are replaced. There are following deficiencies and problems in this operation scheme:

1. A small number of 10kV poles are set up in narrow streets or on the edge of rice fields, so that the insulated bucket truck cannot enter, and the replacement of post insulators with power on will not be possible;

2. The parking place of the insulated bucket arm truck must be leveled and compacted. If the insulated bucket truck is parked on an uneven ground or works on a soft ground, during the process of lifting the wires, the force on the boom of the bucket truck will cause the vehicle to be locked, and the ground operator will cause errors during the unlocking process under mental stress. operate;

3. After the wire is lifted, the wire and the vehicle become a whole. When the operator replaces the post insulator, the size of the operation range will cause the arm to swing, and the wire will swing accordingly. There is a risk of phase-to-phase short circuit in bare conductor installations with large line spans and small phase-to-phase distances;

4. The load capacity of the lifting wire of the small crane depends on the parking situation of the insulated bucket truck and the angle between the insulating arm and the working surface, which directly affects the load capacity of the lifting wire of the small crane. For the span of overhead lines and the type and size of conductors, the person in charge of the general work will not calculate how much capacity is actually required to lift the load of the conductors;

5. In actual work, most of the work teams have removed the small hanging device. Random placement may cause damage to the insulating rope and blockage of the insulating oil return pipe, resulting in ignorance of the maintenance of the small hanging rope, load test, etc.;

6. When the small crane is lifting the wire and bearing the wire tension, the insulating arm of the insulating bucket arm truck will not be able to adjust the height and horizontal position. Only by adjusting the position of the working bucket, when replacing the three-phase wires for triangular arrangement or horizontal arrangement overhead distribution It is difficult for the staff to find a suitable working position for the intermediate phase column insulators of the electric line device; Narrow, insufficient safety distance from the upper cross arm;

8. On a straight corner pole less than 15°, there is a danger of line running because the wire has a horizontal pull pointing to the inner corner side. If the insulated bucket truck is at the outer corner, the small crane will bear the outward horizontal pulling force, which is prohibited when the insulated bucket truck is used; while the insulated bucket truck is at the inner corner, the wire will touch the insulating bucket, resulting in The safety distance is insufficient, and the horizontal lateral force of the insulating bucket may damage its level adjustment device;

9. When the line span is large and the temperature is low, the lifting wire of the small boom or strut will be subjected to a large downward force, which may exceed the maximum rated load.

To sum up, there are many technical problems and potential safety hazards in replacing post insulators with insulated bucket trucks.

Contents of the invention

The technical problem to be solved by the present invention is to provide a fast replacement device for post-type insulators driven by a lead screw, which solves the technical problems and potential safety hazards existing in the traditional replacement of post-type insulators by an insulating arm truck.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical scheme: the quick-change device for post-type insulators driven by a lead screw includes a fixing seat and an insulating support provided with a wire support plate, and the fixing seat and the angle steel of the insulating cross-arm are connected by bolts Fixed, the wire support plate is used to lift the wire up and separate the wire from the insulator of the insulating cross arm, the fixed seat is provided with a lifting mechanism that drives the insulating bracket to rise and fall relative to the fixed seat, and the lifting mechanism includes a fixed shaft , a lifting sleeve and a lifting seat, the fixed shaft is vertically arranged and fixed with the fixed seat, the fixed shaft has a lead screw section, and the lifting sleeve is provided with an internal thread threadedly connected with the screw mandrel section, the The lifting seat has an inner cylinder, and a bearing is arranged between the inner cylinder and the lifting sleeve. A pawl wrench is connected to the lower part of the lifting sleeve to drive the lifting sleeve to rotate. The lifting sleeve During the rotating process, the cylinder moves up and down relative to the fixed shaft and drives the lifting seat to rise during the rising process. The lifting seat is connected with the insulating support and drives the insulating support to move up and down.

Preferably, the fixing base is fixed to the vertical side plate of the insulating cross-arm angle steel through vertical connecting bolts, and the fixing base is fixed to the horizontal side plate of the insulating cross-arm angle steel through horizontal connecting bolts.

Preferably, two side-by-side support plates are arranged on both sides of the upper part of the insulating support, and two support plates are arranged side by side and vertically intersect with the two support plates. The vias through which the board passes.

Preferably, the wire support plate is provided with a wire groove for accommodating wires and a safety buckle for fastening the wires in the wire groove.

Preferably, the bearing includes a first bearing and a second bearing arranged up and down, a shaft sleeve is provided between the first bearing and the second bearing, and an upper flange is provided on the inner circle of the upper end of the inner cylinder, The first bearing is arranged between the upper end of the bushing and the upper flange, the lifting sleeve is provided with a lower flange on the lower side of the inner cylinder, and the upper end of the second bearing abuts against the bottom of the bushing end, the lower end abuts the lower flange.

Preferably, the lifting sleeve is provided with ratchet teeth on the outer circle of the lower side of the lower flange, the pawl wrench is covered on the ratchet teeth, and the ratchet wrench is provided with a steering wheel for converting the up and down movement direction of the lifting sleeve. pawl.

The technical scheme adopted in the present invention, combined with the characteristics of live work on 10kV lines, meets the requirements of live work on distribution lines, and designs a set of simple insulating brackets that can easily replace column insulators with live electricity and optimizes the combination, which can not only effectively shorten the time for live emergency repairs, It can also greatly reduce operating costs, improve the safety and reliability of live work, reduce power supply losses, and greatly guarantee the safe operation of transmission lines.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

Fig. 1 is a front view structural schematic diagram of Embodiment 1 of the present invention;

Fig. 2 is a side view structural schematic diagram of Embodiment 1 of the present invention;

Fig. 3 is a top view structural schematic diagram of Embodiment 1 of the present invention;

Fig. 4 is a schematic structural diagram of Embodiment 2 of the present invention;

Fig. 5 is a schematic structural view of the lifting sleeve in the second embodiment.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The present invention is used to replace the post insulator on the insulating cross-arm with electricity, as shown in Fig. 1 to Fig. 3, the adjustable post insulator live replacement device is detachably connected with the angle steel 4 of the insulating cross-arm, including the insulating support 1 and The fixed seat 2 and the thread support plate 3 are arranged on the insulating support 1, the fixed seat 2 and the angle steel 4 of the insulating cross arm are fixed by connecting bolts 22, and the fixed seat 2 is provided with a driving insulating support 1 to the fixed seat 2 A lifting mechanism for lifting, the lifting mechanism includes a gear 21, the gear 21 is installed on the rotating shaft, the rotating shaft is connected to the fixed seat 2 in rotation, the rotating shaft is connected with a handle 211 that drives the rotating shaft to rotate, and the insulating support 1 A rack 11 meshing with a gear 21 is arranged vertically on the upper side. By adjusting the height of the insulating support 1, the wire support plate 3 lifts the wire 5 up, thereby replacing the post insulator 41 to bear the wire 5, so that the wire 5 is separated from the post insulator 41 of the insulating cross arm, and the operation of replacing the post insulator 41 is realized. .

Wherein, the fixing base 2 is fixed to the vertical side plate of the insulating cross-arm angle steel 4 through vertical connecting bolts, and the fixing base 2 is fixed to the horizontal side plate of the insulating cross-arm angle steel 4 through horizontal connecting bolts. The lock nut ends of the vertical connecting bolts and horizontal connecting bolts are connected with movable claws. After the lock nuts are screwed tightly, the movable claws can firmly grasp and hold the horizontal side plate and the insulating cross-arm angle steel. The edge of the vertical side plate makes the fixing seat 2 reliably fixed on the angle steel 4 of the insulating cross arm, and has the advantages of fast fixing and convenient disassembly.

In this embodiment, the insulating support 1 includes a support rod made of U-shaped steel and two side-by-side support plates 12 welded and fixed on both sides of the upper part of the support rod. The rack 11 is fixed inside the U-shaped steel material, and can be connected by welding, bolts, or other connection methods. Two thread support plates 3 are arranged side by side and vertically intersect with two support plates 12. The support plate 12 is provided with a through hole for the thread support plate 3 to pass through, and the through hole can be fixed by welding.

In addition, the wire support plate 3 is provided with a wire groove for accommodating wires and a safety buckle 31 for fastening the wires 5 in the wire grooves to prevent the wires 5 from falling off.

Select a suitable position on the insulating cross arm, use the connecting bolt 22 on the fixing seat 2 to install the insulating bracket 1 on the angle steel 4 of the insulating cross arm, the wire support plate 3 supports the wire 5, and buckle the safety buckle 31 to prevent the wire 5 Fall off, untie the wire binding, swing the handle 211, use the rack and pinion lifting combination to lift the wire 5 to a suitable height, replace the column insulator, the safety lock 212 is provided on the fixing seat 2, after lifting the wire 5 to a suitable height , the gear can be locked by the safety lock 212.

Embodiment 2, as shown in FIG. 4 and FIG. 5 , is different from Embodiment 1 in that the lifting mechanism used in the present invention is a screw nut mechanism. Wherein, the lifting mechanism includes a fixed shaft 23, a lifting sleeve 24 and a lifting seat 25, the fixed shaft 23 is vertically arranged and fixed with the fixed seat 2, the fixed shaft 23 has a lead screw section 231, The lifting sleeve 24 is provided with an internal thread 241 threadedly connected with the screw mandrel section 231, the lifting seat 25 has an inner cylindrical body 251, and a Bearing, the lower part of the lifting sleeve 24 is connected with a ratchet wrench 26 that drives the lifting sleeve 24 to rotate, and the lifting sleeve 24 is lifted relative to the fixed shaft 23 during the rotation and drives the lifting seat 25 to rise during the rising process. The lifting base 25 is connected with the insulating support 1 and drives the insulating support 1 to lift.

Wherein, the upper end of the fixed shaft 23 has a fixed portion 232 which can be connected with the fixed base 2 by bolts. The lifting base 25 is provided with a connecting portion 255, which can be connected with the insulating support 1 by bolts. Described bearing comprises the first bearing 252 and the second bearing 253 that are arranged up and down, and axle sleeve 254 is arranged between described first bearing 252 and second bearing 253, and the inner circle of the upper end of described inner cylindrical body is provided with upward protrusion. The first bearing 252 is located between the upper end of the shaft sleeve and the upper flange, and the lower flange 243 is provided on the lower outer circle of the inner cylindrical body of the lifting sleeve, and the upper end of the second bearing 253 It abuts against the bottom end of the sleeve, and the lower end abuts against the lower flange 243 . Since the lifting base 25 and the lifting sleeve 24 are rotatably connected by bearings, the orientation of the insulating support 1 can be adjusted by gently rotating the lifting base 25 so that the wire groove corresponds to the wire, while the operator can keep still, which is very convenient for operation .

The lifting sleeve 24 is provided with an annular groove on the outer circumference of the upper side of the inner cylindrical body, and a snap ring 242 is arranged in the annular groove. The outer circumference of the lower end of the lifting sleeve 24 is provided with an external thread 245 , and a limit nut 246 is screwed on the external thread. The lifting sleeve 24 is provided with a ratchet 244 on the outer circle of the lower side of the lower flange, and the pawl wrench 26 is sleeved on the ratchet 244, and the pawl wrench 26 is provided with a conversion lifting sleeve 24 to move up and down direction of the steering pawl. The ratchet wrench 26 is provided with a steering pawl groove 261 on the rear side of the barrel of the ratchet. The upper and lower sides of the steering pawl groove are provided with a pin hole 262 and a pin shaft is installed. The ratchet wrench 26 pulls the steering ratchet, which can change the up and down movement direction of the lifting sleeve, so the lifting sleeve 24 and the lifting seat 25 can both move up and down, and the column insulator is easy to unload after replacement. The tail end of the ratchet wrench 26 is provided with a connecting threaded hole 263, which can be connected with an extension rod, so that the operation is more labor-saving.

The screw nut mechanism is used to replace the insulator. When working, put the wire directly into the wire groove, buckle the safety buckle, and turn the ratchet wrench to make the lifting sleeve drive the lifting seat and the insulating support to move upward.

The effect that the present invention can achieve:

1. Developed and completed the height-adjustable insulating support device that meets the requirements of live operation of distribution lines;

2. Meet the electrical performance requirements of 10kV live working;

3. The rated load of the insulating support is 1.5KN;

4. The lifting range of the insulating support is 300mm;

5. Improve work efficiency, the time for replacing post insulators is reduced from 120 minutes to 45 minutes, and the operation can be completed by only one operator instead of two.

The invention solves the technical problems and potential safety hazards existing in the traditional replacement of column insulators with insulated bucket arm trucks, effectively shortens the time for live emergency repairs, greatly reduces operating costs, improves the safety and reliability of live work, and reduces power supply losses. It greatly guarantees the safe operation of the transmission line.

Except above-mentioned preferred embodiment, the present invention also has other implementation modes, those skilled in the art can make various changes and distortions according to the present invention, as long as not departing from the spirit of the present invention, all should belong to the defined in the claims of the present invention scope.

Except above-mentioned preferred embodiment, the present invention also has other implementation modes, those skilled in the art can make various changes and distortions according to the present invention, as long as not departing from the spirit of the present invention, all should belong to the defined in the claims of the present invention scope.

Claims (6)

1. The quick-change device for post-type insulators driven by a lead screw is characterized in that it includes a fixing seat and an insulating support provided with a support plate, the fixing seat and the angle steel of the insulating cross arm are fixed by connecting bolts, and the support plate It is used to lift the wire up and separate the wire from the insulator of the insulating cross arm. The fixed seat is provided with a lifting mechanism that drives the insulating bracket to rise and fall relative to the fixed seat. The lifting mechanism includes a fixed shaft, a lifting sleeve and a Lifting seat, the fixed shaft is vertically arranged and fixed with the fixed seat, the fixed shaft has a screw section, the lifting sleeve is provided with an internal thread threaded with the screw section, and the lifting seat has an inner cylinder body, a bearing is provided between the inner cylindrical body and the lifting sleeve, the lower part of the lifting sleeve is connected with a ratchet wrench that drives the lifting sleeve to rotate, and the lifting sleeve is relatively fixed during rotation. The shaft goes up and down and drives the lifting seat to rise during the rising process, and the lifting seat is connected with the insulating support and drives the insulating support to rise and fall. 2. The screw-driven post-type insulator quick replacement device according to claim 1, characterized in that: the fixing seat is fixed to the vertical side plate of the insulating cross-arm angle steel through vertical connecting bolts, and the fixing seat is fixed by The horizontal connecting bolts are fixed to the horizontal side plates of the insulating cross-arm angle steel. 3. The screw-driven column type insulator quick replacement device according to claim 1, characterized in that: two support plates arranged side by side are arranged on both sides of the upper part of the insulating support, and the support plates are arranged side by side. Two and vertically intersect with the two support plates, and the support plates are provided with through holes for thread support plates to pass through. 4. The quick-change device for post-type insulators driven by a lead screw according to claim 3, characterized in that: the wire support plate is provided with a wire groove for accommodating the wire and a safety buckle for fastening the wire into the wire groove. 5. The screw-driven column type insulator quick replacement device according to claim 1, characterized in that: the bearing comprises a first bearing and a second bearing arranged up and down, and the gap between the first bearing and the second bearing is A shaft sleeve is provided, and an upper flange is provided on the inner circle of the upper end of the inner cylindrical body, and the first bearing is arranged between the upper end of the shaft sleeve and the upper flange, and the lifting sleeve is arranged under the inner cylindrical body. A lower flange is provided on the outer circle of the side, the upper end of the second bearing abuts against the bottom end of the shaft sleeve, and the lower end abuts against the lower flange. 6. The screw-driven column type insulator quick replacement device according to claim 5, characterized in that: the lifting sleeve is provided with ratchet teeth on the outer circle of the lower side of the lower flange, and the ratchet wrench is covered with On the ratchet, the pawl wrench is provided with a steering pawl for converting the up and down movement direction of the lifting sleeve.