CN107658785B - Screw driven post insulator quick change device - Google Patents

Abstract

The application discloses a screw-driven column type insulator quick replacement device which comprises a fixed seat and an insulating support, wherein a lifting mechanism is arranged on the fixed seat and comprises 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 is provided with a screw rod section, the lifting sleeve is provided with an internal thread in threaded connection with the screw rod section, the lifting seat is provided with an internal cylinder, a bearing is arranged between the internal cylinder and the lifting sleeve, the lower part of the lifting sleeve is connected with a pawl spanner which drives the lifting sleeve to rotate, the lifting sleeve is lifted relative to the fixed shaft in the rotation process and drives the lifting seat to lift in the lifting process, and the lifting seat is connected with the insulating support and drives the insulating support to lift. The simple insulating bracket of the column insulator can be easily replaced in an electrified manner, so that the electrified emergency repair time can be effectively shortened, and the operation cost can be greatly reduced.

Description

Screw driven post insulator quick change device

Technical field

The present invention relates to electrical tools, in particular to insulator replacement tools.

Background technique

At present, the live replacement of post insulators usually uses an insulating bucket arm truck, using a small crane to lift the wires, and then replace the post insulators. This work plan has the following shortcomings and problems:

1. A small number of 10kV poles are set up in narrow streets or on the edge of rice fields, making it impossible for insulating boom trucks to enter, and it will be impossible to replace column insulators with power on;

2. The parking area for insulated boom trucks must be flat and compacted. If the parking area of the insulated boom truck is uneven or the ground is working on soft ground, during the process of lifting wires, the force on the boom of the boom truck will cause the vehicle to lock. Under mental stress, the ground workers may cause errors during the unlocking process. operate;

3. After lifting the wire, the wire and the vehicle become a whole. When the operator replaces the post insulator, the size of the operation 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 devices with large line spacing and small phase distance;

4. The load capacity of the small crane lifting wire depends on the parking situation of the insulating arm truck and the angle between the insulating arm and the working surface, which directly affects the load capacity of the small crane lifting wire. Regarding the spacing of overhead lines and the model size of conductors, the person in charge of the work generally does not calculate how much capacity is needed to actually increase the conductor load;

5. In actual work, most work teams have dismantled the small hanging device. Random placement may cause damage to the insulating rope and blockage of the insulating oil return pipe, leading to neglect of maintenance and load testing of the small hanging rope;

6. When the small crane lifts the wire and bears the tension of the wire, the height and horizontal position of the insulating arm of the insulated bucket arm truck cannot be adjusted. Only by adjusting the position of the working bucket, the three-phase wires are replaced in a triangular arrangement or a horizontal arrangement in an overhead configuration. When installing middle-phase column insulators on electrical lines, it is difficult for workers to find a suitable working position; 7. When replacing the middle and lower column insulators on a vertically arranged double-circuit parallel rod device, there is no space for the insulating arm truck to move Narrow, with insufficient safety distance from the upper cross arm;

8. On straight-line angle poles less than 15°, there is a risk of line deviation due to the horizontal pulling force of the wire directed to the inner corner side. If the insulated bucket arm truck is in the outer corner position, the small crane will bear the outward horizontal pulling force, which is prohibited when the insulated bucket arm truck is used; and if the insulated bucket arm truck is in the inner corner position, the wire will touch the insulating bucket, resulting in The safety distance is insufficient, and the horizontal lateral force on the insulated bucket may damage its horizontal adjustment device;

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

In summary, there are many technical problems and safety hazards in using an insulating bucket arm truck to replace column insulators.

Contents of the invention

The technical problem to be solved by the present invention is to provide a screw-driven quick replacement device for column insulators, which solves the technical problems and safety hazards that exist in the traditional replacement of column insulators by using an insulating bucket arm truck.

In order to solve the above technical problems, the present invention adopts the following technical solution: a screw-driven quick replacement device for column insulators, including a fixed base and an insulating bracket provided with a supporting plate. The fixed base and the angle steel of the insulating cross arm are connected through connecting 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 base is provided with a lifting mechanism that drives the insulating bracket to lift relative to the fixed base. The lifting mechanism includes a fixed shaft. , a lifting sleeve and a lifting seat, the fixed shaft is arranged vertically and fixed to the fixed base, the fixed shaft has a screw section, the lifting sleeve is provided with an internal thread threadedly connected to the screw section, so The lifting seat has an inner cylinder, and a bearing is provided between the inner cylinder and the lifting sleeve. The lower part of the lifting sleeve is connected with a pawl wrench that drives the lifting sleeve to rotate. The lifting sleeve The barrel rises and falls relative to the fixed shaft during rotation and drives the lifting seat to rise during the rising process. The lifting seat is connected to the insulating bracket and drives the insulating bracket to rise and fall.

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

Preferably, two support plates are arranged side by side on both sides of the upper part of the insulating bracket. Two support plates are arranged side by side and intersect perpendicularly with the two support plates. The support plates are provided with support wires. The through hole through which the board passes.

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

Preferably, the bearing includes a first bearing and a second bearing arranged up and down, a 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 located between the upper end of the shaft sleeve and the upper flange. The lifting sleeve is provided with a lower flange on the lower side of the inner cylindrical body. The upper end of the second bearing abuts the bottom of the shaft sleeve. end, the lower end abuts the lower flange.

Preferably, the lifting sleeve is provided with a ratchet on the outer circle of the lower side of the lower flange, the pawl wrench is coated on the ratchet, and the pawl wrench is provided with a steering wheel that converts the up and down movement direction of the lifting sleeve. pawl.

The technical solution adopted in this invention combines the characteristics of live operation of 10kV lines and meets the requirements of live operation of distribution lines. It designs a set of simple insulating brackets that can easily replace column insulators with power and optimizes the combination. It can not only effectively shorten the time of live emergency repair, It can also significantly reduce operating costs, improve the safety and reliability of live operations, reduce power supply losses, and greatly ensure the safe operation of transmission lines.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

Figure 1 is a schematic front structural view of Embodiment 1 of the present invention;

Figure 2 is a side structural schematic diagram of Embodiment 1 of the present invention;

Figure 3 is a schematic top view of the structure of Embodiment 1 of the present invention;

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

Figure 5 is a schematic structural diagram of the lifting sleeve in the second embodiment.

Detailed ways

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

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present invention.

The present invention is used for live replacement of column insulators on insulating cross arms. Referring to Figures 1 to 3, the adjustable column insulator live replacement device is detachably connected to the angle steel 4 of the insulating cross arm and includes an insulating bracket 1 and The fixed base 2 and the wire support plate 3 are provided on the insulating bracket 1. The fixed base 2 and the angle steel 4 of the insulating cross arm are fixed by connecting bolts 22. The fixed base 2 is provided with a driving insulating bracket 1 relative to the fixed base 2. Lifting mechanism for lifting. The lifting mechanism includes a gear 21. The gear 21 is installed on a rotating shaft. The rotating shaft is rotationally connected to the fixed base 2. The rotating shaft is connected to a handle 211 that drives the rotating shaft to rotate. The insulating bracket 1 A rack 11 meshing with the gear 21 is arranged vertically on the upper part. By adjusting the height of the insulating bracket 1, the wire supporting plate 3 lifts up the conductor 5, thereby replacing the column insulator 41 to bear the conductor 5, separating the conductor 5 from the column insulator 41 of the insulating cross arm, and realizing the replacement of the column insulator 41. .

Among them, the fixed base 2 is fixed to the vertical side plate of the insulating cross arm angle steel 4 through vertical connecting bolts, and the fixed 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 claw pieces. After the lock nut threads are tightened, the movable claw pieces can be firmly grasped and attached to the horizontal side plates and the insulating cross arm angle steel. The vertical side plate edge enables the fixing base 2 to be reliably fixed on the angle steel 4 of the insulating cross arm, and has the advantages of fast fixing and easy disassembly.

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

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

Select a suitable position on the insulating cross arm, use the connecting bolts 22 on the fixed base 2 to install the insulating bracket 1 on the angle steel 4 of the insulating cross arm, hold the wire support plate 3 to support the wire 5, and fasten the safety buckle 31 to prevent the wire 5 fall off, untie the wire and swing the handle 211, use the gear and rack lifting combination to lift the wire 5 to a suitable height, replace the column insulator, the fixed base 2 is provided with a safety lock 212, after lifting the wire 5 to a suitable height , the gear can be locked through the safety lock 212.

Embodiment 2, as shown in Figures 4 and 5, is different from Embodiment 1 in that the lifting mechanism used in the present invention is a screw nut mechanism. The lifting mechanism includes a fixed shaft 23, a lifting sleeve 24 and a lifting base 25. The fixed shaft 23 is arranged vertically and fixed to the fixed base 2. The fixed shaft 23 has a screw section 231. The lifting sleeve 24 is provided with an internal thread 241 that is threadedly connected to the screw section 231. The lifting base 25 has an inner cylinder 251, and there is an inner cylinder 251 between the inner cylinder 251 and the lifting sleeve 24. Bearing, the lower part of the lifting sleeve 24 is connected with a pawl wrench 26 that drives the lifting sleeve 24 to rotate. The lifting sleeve 24 rises and falls relative to the fixed shaft 23 during the rotation process and drives the lifting seat 25 to rise during the rising process. The lifting base 25 is connected to the insulating bracket 1 and drives the insulating bracket 1 to rise and fall.

The upper end of the fixed shaft 23 has a fixed portion 232, which can be connected with the fixed base 2 using bolts. The lifting base 25 is provided with a connecting portion 255, which can be connected with the insulating bracket 1 using bolts. The bearing includes a first bearing 252 and a second bearing 253 arranged up and down. A sleeve 254 is provided between the first bearing 252 and the second bearing 253. An upper protrusion is provided on the inner circle of the upper end of the inner cylinder. The first bearing 252 is provided between the upper end of the shaft sleeve and the upper flange. The lifting sleeve is provided with a lower flange 243 on the lower side of the inner cylinder. The upper end of the second bearing 253 It contacts the bottom end of the shaft sleeve, and the lower end contacts the lower flange 243. Since the lifting base 25 and the lifting sleeve 24 are rotationally connected through bearings, the orientation of the insulating bracket 1 can be adjusted by gently turning the lifting base 25 so that the wire trough corresponds to the conductor, and the operator can remain still, which is very convenient for operation. .

The lifting sleeve 24 is provided with an annular groove on the upper side and outer circumference of the inner cylinder, and a snap ring 242 is provided 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 threaded on the external thread. The lifting sleeve 24 is provided with a ratchet 244 on the outer circumference of the lower side of the lower flange. The pawl wrench 26 is sleeved on the ratchet 244. The pawl wrench 26 is provided with a conversion lifting sleeve 24 that moves up and down. direction steering pawl. The pawl wrench 26 is sleeved on the rear side of the ratchet barrel and is provided with a steering pawl groove 261. The upper and lower sides of the steering pawl groove are provided with a pin hole 262 and a pin is installed. The steering pawl is connected to the pin and passes through The pawl wrench 26 turns the steering pawl to change the upward and downward movement direction of the lifting sleeve. Therefore, the lifting sleeve 24 and the lifting seat 25 can move upward or downward, making it easy to unload the post insulator after replacement. The tail end of the pawl wrench 26 is provided with a connecting threaded hole 263, which can be connected to an extension rod, thereby making the operation more labor-saving.

The screw nut mechanism is used to replace the insulator. During operation, directly put the wire into the wire trough, fasten the safety buckle, and turn the pawl wrench so that the lifting sleeve drives the lifting seat and the insulating bracket to move upward.

Effects achieved by this invention:

1. Develop and complete the height-adjustable insulating support device that meets the requirements for live operation of distribution lines;

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

3. The rated load of the insulation bracket is 1.5KN;

4. The lifting range of the insulation bracket is 300mm;

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

The invention solves the technical problems and potential safety hazards in the traditional use of insulated bucket arm trucks to replace column insulators, effectively shortens the live emergency repair time, greatly reduces operating costs, improves the safety and reliability of live operations, reduces power supply losses, and greatly This greatly ensures the safe operation of transmission lines.

In addition to the above preferred embodiments, the present invention has other embodiments. Those skilled in the art can make various changes and deformations according to the present invention. As long as they do not deviate from the spirit of the present invention, they should all fall within the scope of the invention as defined in the claims. scope.

In addition to the above preferred embodiments, the present invention has other embodiments. Those skilled in the art can make various changes and deformations according to the present invention. As long as they do not deviate from the spirit of the present invention, they should all fall within the scope of the invention as defined in the claims. scope.

Claims (1)

1. Screw-driven column insulator quick replacement device, its characterized in that: the wire supporting plate is used for lifting the wire and separating the wire from an insulator of the insulating cross arm, the fixing seat is provided with a lifting mechanism for driving the insulating support to lift relative to the fixing seat, the lifting mechanism comprises a fixing shaft, a lifting sleeve and a lifting seat, the fixing shaft is vertically arranged and fixed with the fixing seat, the fixing shaft is provided with a screw rod section, the lifting sleeve is provided with an internal thread in threaded connection with the screw rod section, the lifting seat is provided with an internal cylinder body, a bearing is arranged between the internal cylinder body and the lifting sleeve, the lower part of the lifting sleeve is connected with a pawl spanner which drives the lifting sleeve to rotate, and the lifting sleeve is lifted relative to the fixing shaft in the lifting process and drives the lifting seat to lift in the lifting process, and the lifting seat is connected with the insulating support and drives the insulating support to lift; the fixing seat is fixed with a vertical side plate of the insulating cross arm angle steel through a vertical connecting bolt, and is fixed with a horizontal side plate of the insulating cross arm angle steel through a horizontal connecting bolt; two side-by-side supporting plates are arranged on two sides of the upper part of the insulating support, two wire supporting plates are arranged side by side and vertically intersected with the two supporting plates, and through holes for the wire supporting plates to pass through are formed in the supporting plates; the wire supporting plate is provided with a wire groove for accommodating the wire and a safety buckle for buckling the wire in the wire groove; the bearing comprises a first bearing and a second bearing which are arranged up and down, a shaft sleeve is arranged between the first bearing and the second bearing, an upper flange is arranged in the inner circle of the upper end of the inner cylinder body, the first bearing is arranged between the upper end of the shaft sleeve and the upper flange, a lower flange is arranged on the outer circle of the lower side of the inner cylinder body of the lifting sleeve, the upper end of the second bearing is abutted to the bottom end of the shaft sleeve, and the lower end of the second bearing is abutted to the lower flange; the outer circle of the lower side of the lower flange of the lifting sleeve is provided with a ratchet, the pawl spanner is sleeved on the ratchet, and the pawl spanner is provided with a steering pawl for converting the up-down movement direction of the lifting sleeve; the pawl spanner pulls the steering pawl, so that the up-and-down movement direction of the lifting sleeve can be changed, the lifting sleeve and the lifting seat can move upwards and downwards, and the column insulator is convenient to unload after being replaced; during operation, the lead is directly placed into the lead groove, the safety buckle is buckled, the pawl spanner is rotated, and the lifting sleeve drives the lifting seat and the insulating bracket to move upwards; the connecting bolt on the fixing base is used for installing an insulating support on the angle steel of the insulating cross arm, the wire supporting plate supports the wire, the safety catch is buckled to prevent the wire from falling off, the handle is swung after the wire is tied off, the wire is lifted to a proper height by utilizing the gear rack lifting combination, the column type insulator is replaced, the safety catch is arranged on the fixing base, and the gear is locked by the safety catch after the wire is lifted to the proper height.