CN113488915A - Pole top transition lead temporary support for live replacement of 10kV pole-mounted contact breaker - Google Patents
Pole top transition lead temporary support for live replacement of 10kV pole-mounted contact breaker Download PDFInfo
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- CN113488915A CN113488915A CN202110925600.9A CN202110925600A CN113488915A CN 113488915 A CN113488915 A CN 113488915A CN 202110925600 A CN202110925600 A CN 202110925600A CN 113488915 A CN113488915 A CN 113488915A
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- pole
- support
- lead
- support base
- top transition
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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Abstract
The invention discloses a temporary support for pole top transition leads of a live-line replacement 10kV pole-mounted contact breaker, which comprises a support and lead clamps, wherein the support fixes the lead clamps on angle steel of a composite cross arm, the support comprises a support base and an insulating rod, a switch-type magnetic base is embedded in the support base, one side of the bottom surface of the support base is provided with a clamping groove matched with the horizontal plane thickness of the angle steel, the other side of the bottom surface of the support base is provided with a buckle matched with the vertical plane height of the angle steel, the insulating rod is a T-shaped rod, is arranged on the top surface of the support base and consists of a vertically arranged supporting part and a horizontally arranged isolating part, and the two ends of the isolating part are respectively provided with the lead clamps. The invention can realize the operation of replacing the 10kV on-column connecting circuit breaker in a live manner conveniently, safely and efficiently.
Description
Technical Field
The invention relates to a temporary support for a pole top transition lead of a live-line replacement 10kV pole-mounted contact breaker, which is used in the field of electric power engineering.
Background
The interconnection circuit breaker has played the effect of interconnection and the circuit before and after separating in 10kV distribution lines, when equipment in the circuit breaks down after the present, can be through a series of switching operation, keep apart the fault point to reduce the power failure scope. When the interconnection breaker breaks down and needs to be replaced, the power failure range needs to be enlarged in the conventional power failure operation, and the front line and the rear line are powered off simultaneously, so that the reliability of power supply is seriously influenced. Therefore, the operation mode of live replacement of the 10kV pole-mounted connecting circuit breaker is particularly necessary. At present, the live replacement of a 10kV pole-mounted connecting circuit breaker is totally divided into seven steps: the method comprises the steps of conducting insulation shielding on wires on two sides of a breaker, building up a temporary drainage wire on a rod top, unfastening lead lap ends on two sides of the breaker, replacing the breaker, building up the lead lap ends on two sides of the breaker, cutting off the temporary drainage wire on the rod top, and removing the insulation shielding on two sides of the breaker. Wherein, the interim drainage wire in pole top has played the effect of keeping apart the circuit breaker of treating to change, is whole electrified key step with changing the process. In order to keep the effective distance between the temporary drainage wire and the cross arm (pole), a PS15 (or PS20) pin insulator is usually adopted to fix the top temporary transition lead, and after the circuit breaker is replaced, the temporary lead is cut off, and the PS15 pin insulator is removed. Currently, the method of fixing the temporary transition lead by using the PS15 (or PS20) pin insulator brings the following two disadvantages: firstly, the operation safety distance is little, and the danger coefficient is high. In the process of installing and removing pin insulators (particularly middle-phase insulators), an operator needs to enter the middle of a 10kV wire rod and cling to a main guide wire, a breaker upper lead fixing support and a top double cross arm to complete installation and removal of the pin insulators, and the distance between the operator and devices with different potentials is very short, which is the most dangerous point in the whole operation process. Secondly, the insulation shielding time is long, and the operation efficiency is low. Because the safety distance between an operator and a device without stopping the electric potential is small in the process of installing and removing the pole thimble type insulator, complete insulation shielding measures need to be implemented on an electric part, wherein the measures comprise main leads on two sides, strain clamps, strain insulators and a circuit breaker upper lead, and the whole shielding process at least needs 6 insulation sleeves and 18 pieces of insulation blanket cloth. Meanwhile, the pin insulator is fastened by a nut, and under the condition of wearing the insulating gloves, more energy of operators is consumed in the screwing and fastening processes. In addition, the temporary transition lead is fixed on the pin insulator in a binding mode, and the operation time is further prolonged.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a temporary support for a pole top transition lead of a 10kV pole-mounted contact breaker to be replaced in a live-line mode, which can realize the operation of replacing the 10kV pole-mounted contact breaker in a live-line mode conveniently, safely and efficiently.
One technical scheme for achieving the above purpose is as follows: the utility model provides a change 10kV post top transition lead wire temporary stand of online connecting circuit breaker, includes support and lead clamp, the support will the fastener is fixed in on the angle steel of compound cross arm, its characterized in that:
the support includes support base and insulator spindle, the embedded on-off magnetic base that is equipped with of support base, bottom surface one side of support base is equipped with the draw-in groove that matches with angle steel horizontal plane thickness, the bottom surface opposite side of support base is equipped with the buckle that highly matches with the vertical face of angle steel, the insulator spindle is T type pole, its set up in on the support base top surface, constitute by the support part of vertical setting and the isolation part of level setting, the both ends of isolation part are equipped with respectively the lead clamp.
Further, the support base is packaged by a composite nylon material.
Furthermore, a magnetic attraction structure is arranged at the closing position of the switch type magnetic base.
Further, the support part of the insulating rod is connected with the bracket base in a tilting mode through a rotating mechanism.
And furthermore, the rotating mechanism is provided with a limit buckle position which rotates synchronously with the supporting part of the insulating rod and can be locked and limited after the supporting part is reset and returns to the vertical state.
Furthermore, the insulating rod is made of 3640 epoxy phenolic glass cloth insulating hollow pipes.
Further, the height of the support portion is at least 400mm, the length of the insulating portion is at least 725mm, and the distance between the clamping members of the lead clamp is at least 540 mm.
Furthermore, one side of a pressing plate groove of the lead clamp is provided with a raised side blocking structure.
The temporary support for the pole top transition lead of the live-line replacement 10kV pole-mounted contact breaker is used for carrying out operation, the conventional operation method for fixing the three-phase temporary lead by adopting a PS15 (or PS20) pin insulator is replaced, and the problems of small operation safety distance and low operation efficiency can be solved. After using this temporary support, the operation personnel can realize operating to interim transition lead wire in the relatively from the circuit outside to utilize the clamp to carry out quick fixation to the transition lead wire. Compared with an operation method without using a temporary support, the temporary support avoids the action of an operator entering the middle fixed pin insulator of the line stop and the temporary lead, reduces the time for screwing a fixed nut at the bottom of the insulator and binding the temporary lead (the original operation method adopts a binding mode to fix the temporary lead on the pin insulator), and improves the operation safety and the operation efficiency.
The supporting insulating rod and the main insulating rod of the temporary support are made of 3640 epoxy phenolic glass cloth insulating hollow pipes commonly used by live-line tools, the length of the insulating hollow pipes meets the requirements of national grid company electric safety work regulations, and the insulating property is excellent; the lead fixing clamp adopts a quick clamping mode, so that the speed of fixing the temporary lead is high, and the fixing firmness can be ensured; the fixing mode of the bracket base adopts the scheme that the buckle is combined with the switch type magnetic base, so that the disassembly and assembly speed is high, and the bracket can be kept stable enough in all stress directions; the support base adopts insulating encapsulation, has guaranteed the security of dismouting process.
Drawings
FIG. 1 is a schematic structural view of a pole top transition lead temporary support for live replacement of a 10kV pole top contact breaker according to the present invention;
fig. 2 is a front view of a pole top transition lead temporary support for a live replacement 10kV on-pole contact breaker of the present invention;
fig. 3 is a front view of a cradle base of a pole top transition lead temporary cradle for a live replacement 10kV on-pole contact breaker of the present invention;
fig. 4 is a half-sectional view of a cradle base of a pole-top transition lead temporary cradle for a live-replacement 10kV on-pole contact breaker of the present invention;
fig. 5 is a side view of a cradle base of a pole top transition lead temporary cradle for live replacement of a 10kV on-pole contact breaker in accordance with the present invention;
FIG. 6 is a schematic structural view of an insulating rod for hot-line replacement of a pole top transition lead temporary support of a 10kV pole-mounted contact breaker according to the present invention;
fig. 7 is a schematic structural diagram of a lead clamp for live replacement of a pole-top transition lead temporary support of a 10kV pole-mounted contact breaker according to the present invention.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is made by specific examples:
referring to fig. 1 and 2, the temporary support for pole top transition lead wire of live-line replacement of a 10kV pole-mounted contact breaker comprises a support and a lead clamp 3, wherein the support fixes the lead clamp on an angle steel of a composite cross arm, and the support comprises a support base 1 and an insulating rod 2.
Referring to fig. 3 to 5, a switch type magnetic base is embedded in the bracket base 1, and the type of the switch type magnetic base is SCK-150GSK type, so that the suction force can reach 1500N, the bracket can be reliably fixed on the composite cross arm, the application and release of the base magnetic force can be controlled through the switch, and the convenience of the installation and removal process is ensured. In order to prevent the magnetic switch from being opened by mistake when the bracket is in a fixed state, a magnetic attraction structure is designed at the closing position of the magnetic switch, and certain resistance needs to be overcome in the opening process of the switch. The base is packaged by adopting a composite nylon material, so that the insulating and isolating effects are achieved. A clamping groove 11 matched with the horizontal plane thickness of the angle steel is formed in one side of the bottom surface of the support base 1, and a buckle 12 matched with the vertical plane height of the angle steel is formed in the other side of the bottom surface of the support base. For example, the structural design is carried out according to the size of a typical composite cross arm device (1904mm), the width of the bottom of the bracket base is 85mm, the width of a width clamping groove 11 capable of covering composite cross arm angle steel is 8mm, and is slightly larger than the thickness of the angle steel by 7mm, so that certain tightness is met while the cross arm angle steel can be smoothly clamped; the height of the buckle 12 can meet the requirement of meeting the height of the cross arm angle steel. The integrated configuration of draw-in groove and buckle can provide structural reserve protection outside magnetic force adsorbs for the base, prevents to topple over around the support. The upper surface of the bracket base is provided with a rotating mechanism 13 which is provided with a slotted structure with alpha of 0-40 degrees, so that the supporting part of the insulating rod 2 can rotate back and forth in the angle direction. The rotating mechanism 13 is provided with a limit buckle 14, the limit buckle 14 rotates synchronously with the supporting part of the insulating rod, and can be locked and limited after the supporting part is reset and returns to the vertical state, so that the supporting insulating rod can be clamped into the edge of the top of the base in the vertical state, and the position of the supporting insulating rod is locked.
Referring to fig. 6 to 7, the insulating rod 2 is a T-shaped rod disposed onOn the support base top surface, constitute by the support part 21 of vertical setting and the isolation part 22 of level setting, the material of insulator spindle is 3640 epoxy phenolic glass cloth insulating hollow tube, has guaranteed sufficient mechanical strength when satisfying insulating properties. The height of the supporting part is at least 400mm, and the length of the insulating part is at least 725mm, so that the safety distance between the temporary drainage wire and the electric potential part such as a cross arm, an electric pole and the like is ensured, and the relevant regulation of the effective insulation length of the insulating force-bearing tool for 10kV voltage class in the electric power safety regulation is met. The lead clips 3 are provided at both ends of the separation portion 22, respectively. The distance of the clamping elements of the lead clamp 3 is at least 540 mm. The body of the lead fixing clamp adopts a horizontal type quick clamp, and utilizes a dead point clamping mechanical principle, the temporary lead is placed in the pressing plate groove and then presses the pressing handle mechanism to be in a dead point position, the temporary lead is fixed, the clamping force of the quick clamp is stable, and the use is convenient and quick. The opening radius of the pressing plate groove is designed to be 7mm, the opening radian is 104 degrees, and the common size model (120 mm) of a 10kV main conductor is met2-185mm2). A raised side stop structure 31 is arranged on one side of the pressing plate groove of the lead clamp 3. Because the interim lead wire in well is in the fixed in-process, the insulator spindle is in the tilt state, and traditional clamp plate groove structure easily produces the problem of interim lead wire landing, consequently carries out the structural design of side shelves structure 31, and interim lead wire in well can temporarily rest on this side keeps off in fixed in-process and carry out spacingly, has avoided the problem of interim lead wire landing.
The use method of the temporary support for the pole top transition lead of the live replacement 10kV pole-mounted contact breaker is as follows. The invention is suitable for the fixing work of the temporary lead at the top of the pole in the project process of replacing the 10kV on-pole connecting circuit breaker in an electrified way. After the insulating of accomplishing contact circuit breaker both sides circuit is shielded to the operating personnel, settle interim support on the two cross arms of pole top in the 10kV line shelves outside, go into the draw-in groove card on the support base and go into the cross arm edge and rotate the switch knob of switch formula magnetic base, utilize the fixed interim support of the adsorption affinity of strong magnetism. Open support base rotary mechanism's spacing knot position, to support the outside upset of insulator spindle, make in the interim lead wire clamp rotate to the outside, utilize stationary clamp to fix the interim lead wire after will supporting the insulator spindle and rotate back vertical position and the spacing knot position of locking, the operating personnel get into and come the line shelves outside once more after accomplishing in the butt joint work of leading wire in the middle of the 10kV line shelves, fix the interim lead wire on the outside stationary clamp of support, utilize the lateral length of main insulator spindle, make outer looks interim lead wire and well interim lead wire keep sufficient safe distance and accomplish the butt joint work of the interim lead wire in the outside. When the lead is detached, after an operator cuts off the outer-phase temporary lead outside the 10kV wire guard, the drainage wire is taken down from the lead clamp, and the middle-phase temporary lead is overturned to the outer side by using the base rotating mechanism to be taken down.
When the support is dismounted, the magnetic switch of the switch type magnetic base is rotated, the cross arm buckle on the base is pulled open, and the temporary support is taken down. After the device completes the supporting operation of the middle phase and the side phase of one side in the three-phase temporary lead wire, the temporary lead wire of the side phase of the other side needs an operator to transfer to the other side of the 10kV line for completion. In the whole operation process, the temporary support can be reliably adsorbed on the double cross arms on the top of the rod, the relative middle-phase transition lead wire is operated from the outer side of the circuit through the rotating device, and the transition lead wire is rapidly fixed by the lead wire clamp. The device has avoided the action of operation personnel entering in the middle of the line shelves, has reduced the time of twisting insulator bottom fixation nut, has promoted the operating efficiency when promoting the operation security.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a change 10kV post top transition lead wire temporary stand of online connecting circuit breaker, includes support and lead clamp, the support will the fastener is fixed in on the angle steel of compound cross arm, its characterized in that:
the support includes support base and insulator spindle, the embedded on-off magnetic base that is equipped with of support base, bottom surface one side of support base is equipped with the draw-in groove that matches with angle steel horizontal plane thickness, the bottom surface opposite side of support base is equipped with the buckle that highly matches with the vertical face of angle steel, the insulator spindle is T type pole, its set up in on the support base top surface, constitute by the support part of vertical setting and the isolation part of level setting, the both ends of isolation part are equipped with respectively the lead clamp.
2. The pole top transition lead temporary support for a live replacement 10kV on-pole tie-down circuit breaker of claim 1, wherein the support base is encapsulated by a composite nylon material.
3. The pole top transition lead temporary support for the live replacement of a 10kV pole-mounted contact breaker according to claim 1, wherein a magnetic attraction structure is arranged at a closing position of a switch of the switch type magnetic base.
4. The pole top transition lead temporary support for the live replacement of a 10kV on-pole contact breaker of claim 1, wherein the supporting portion of the insulating rod is tiltably connected with the support base by a rotating mechanism.
5. The pole top transition lead temporary support for the live replacement of the 10kV pole-mounted contact breaker as recited in claim 4, wherein the rotating mechanism is provided with a limit buckle, the limit buckle rotates synchronously with the supporting part of the insulating rod, and the limit buckle can be locked and limited after the supporting part is reset to a vertical state.
6. The pole top transition lead temporary support for the live replacement of the 10kV pole-mounted contact breaker according to claim 1, wherein the insulating rod is made of 3640 epoxy phenolic glass cloth insulating hollow tube.
7. The pole-top transition lead temporary support for a live replacement 10kV pole-top contact breaker according to claim 1, wherein the height of the supporting portion is at least 400mm, the length of the insulating portion is at least 725mm, and the distance of the clamping piece of the lead clamp is at least 540 mm.
8. The pole top transition lead temporary support for the live replacement of a 10kV pole-mounted contact breaker according to claim 1, wherein a raised side stop structure is arranged on one side of a pressing plate groove of the lead clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110925600.9A CN113488915A (en) | 2021-08-12 | 2021-08-12 | Pole top transition lead temporary support for live replacement of 10kV pole-mounted contact breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110925600.9A CN113488915A (en) | 2021-08-12 | 2021-08-12 | Pole top transition lead temporary support for live replacement of 10kV pole-mounted contact breaker |
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| Publication Number | Publication Date |
|---|---|
| CN113488915A true CN113488915A (en) | 2021-10-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110925600.9A Pending CN113488915A (en) | 2021-08-12 | 2021-08-12 | Pole top transition lead temporary support for live replacement of 10kV pole-mounted contact breaker |
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| CN (1) | CN113488915A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614393A (en) * | 2022-03-04 | 2022-06-10 | 河南大唐电力检修有限责任公司 | Electric power overhaul safety protector and electric power overhaul safety protection method |
-
2021
- 2021-08-12 CN CN202110925600.9A patent/CN113488915A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114614393A (en) * | 2022-03-04 | 2022-06-10 | 河南大唐电力检修有限责任公司 | Electric power overhaul safety protector and electric power overhaul safety protection method |
| CN114614393B (en) * | 2022-03-04 | 2024-02-23 | 河南大唐电力检修有限责任公司 | Electric power overhaul safety protector and electric power overhaul safety protection method |
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