CN107706870B - Single-rod double-cable OPGW (optical fiber composite overhead ground wire) residual cable installation fitting and installation method for transformer substation - Google Patents

Abstract

A single-pole double-cable OPGW redundant cable installation hardware and an installation method in a substation mainly include installation hardware, and the installation hardware includes a paired pressure limiting device, a paired cable guiding device, a paired redundant cable reel, a paired pressure limiting device, a paired The cable guiding device and the pair of redundant cable reels together constitute 2 sets of OPGW redundant cable storage hardware. The invention provides a single-pole double-cable OPGW redundant cable installation hardware in a substation and an installation method. By setting two sets of OPGW redundant cable inventory hardware, it can not only ensure that the OPGW optical cable is broken down, but also can solve the problem of insufficient space in a compact substation .

Description

Single-rod double-cable OPGW (optical fiber composite overhead ground wire) residual cable installation fitting and installation method for transformer substation

Technical Field

The invention relates to the field of OPGW cable installation, in particular to a single-rod double-cable OPGW redundant cable installation fitting and an installation method for a transformer substation.

Background

At present, the power grid design in China does not have single-rod double-cable down channel design and single-rod double-cable down special hardware fittings, and potential safety hazards exist in site construction and installation quality. At present, a part of compact transformer substations built by an electric power department has more in-and-out high-voltage cables, phase lines are relatively independent, the part of the high-voltage cables enters the transformer substations and are fixed on a transverse framework of a door-shaped framework once, the phase lines are separated by spacers, OPGW optical cables are required to be led down from the door-shaped rods and are all welded with ADSS optical cables to enter a transformer substation communication machine room. Generally, a 500kV transformer substation corresponds to a 220kV transformer substation with 10 lines, a 220kV transformer substation corresponds to a 110kV transformer substation with 10 lines, and because the number of door-shaped frameworks is limited, the need of intelligent power grid construction cannot be met by installing an OPGW optical cable on one door-shaped rod. A set of metal residual cable frame is erected, the metal residual cable frame is used for storing redundant OPGW optical cables, OPGW joint boxes are fixed, redundant common optical cables are stored, rubber pads are adopted between the metal residual cable frame and a gantry framework for insulation, the problem of insulation grounding of the residual cable frame is solved in a short time, however, rubber clamps and the rubber pads are used for accelerating rubber oxidation of a transformer substation, insulation between the metal residual cable frame and the gantry framework is unreliable, and turn-to-turn discharging strand breakage of the OPGW optical cables is easily caused.

The OPGW optical cable installation hardware fitting in the existing electric power system transformer substation is made of all-metal materials, and once a residual cable frame is damaged, replacement and maintenance are inconvenient; the diameter of the existing residual cable reel of the residual cable rack is customized and cannot be adjusted, and the diameter of the residual cable reel cannot be adjusted according to the actual situation on site.

Disclosure of Invention

The invention aims to solve the technical problem of providing a complete set of hardware fittings for installing single-rod double-cable OPGW (optical fiber composite overhead ground wire) leading-down cables and residual cables of an intelligent substation and an installation method, solving the problem of insufficient space of a compact substation, additionally, ensuring the reliable grounding of OPGW optical cables by additionally arranging a voltage limiting device and a three-point grounding technology, and improving the safety and reliability of single-rod double-cable leading-down.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a single-rod double-cable OPGW (optical fiber composite overhead ground wire) residual cable installation fitting for a transformer substation comprises a gantry rod, wherein a paired voltage limiting device, a paired cable guiding device and a paired residual cable tray are sequentially arranged on the gantry rod from top to bottom, the paired voltage limiting device, the paired cable guiding device and the paired residual cable tray jointly form 2 sets of OPGW residual cable coiling and storing fittings, and two OPGW optical cables sequentially pass through the voltage limiting device of each set of OPGW residual cable coiling and storing fittings and an insulator on the cable guiding device and are wound on the residual cable tray; and a three-point grounding device is further arranged on the gantry rod, and cable protection and annual insulation supervision detection and measurement are performed through the cooperation of the three-point grounding device and the voltage limiting device.

The cable leading device comprises a plurality of pin pulling rod hoops arranged on the upper part of the gantry rod, a U-shaped fixture arranged on the timber platform and a plurality of herringbone rod hoops arranged on the lower part of the gantry rod, wherein needle type insulators are fixed on the pin pulling rod hoops, the U-shaped fixture and the herringbone rod hoops.

The pin-pulling rod hoop and the herringbone rod hoop respectively comprise a left hoop and a right hoop, the left ends and the right ends of the left hoop and the right hoop are locked through bolts, the front end and the rear end of the pin-pulling rod hoop are locked with the support rod clamping pins, and the front end and the rear end of the herringbone rod hoop are fixedly connected with the support rod; the U-shaped fixture comprises a U-shaped fixing seat, a locking bolt is installed on the U-shaped fixing seat, and a clamping head is installed at the end of the locking bolt.

The surplus cable dish in pairs includes the mounting bracket, and the mounting bracket both sides are equipped with a plurality of winding clamps of being made by insulating nonmagnetic material, the mounting bracket includes both sides support body, and both sides support body all is equipped with the semicircle staple bolt from top to bottom, and upper and lower semicircle staple bolt is relative and lock on longmen pole.

The positioning device is arranged on the semicircular hoop and comprises a positioning plate arranged at the lower end of the semicircular hoop on one side, a positioning hole is formed in the positioning plate, a positioning rod is arranged at the lower end of the corresponding semicircular hoop, and an elastic ball is arranged at the end of the positioning rod.

The winding clamp comprises a clamp body, one end of the clamp body is connected with the frame body through a bolt, a winding groove is formed in the other end of the clamp body, and a limiting mechanism is arranged on the winding groove and used for fixing the residual cables; the limiting mechanism comprises a limiting bolt, and the limiting bolt is adjusted and limited through a plurality of adjusting holes in the clamp body; or the limiting mechanism comprises a limiting rod, and the limiting rod slides on the clamp body through the sliding blocks at the two ends and is clamped through the clamping mechanism.

The clamping mechanism comprises a gear rack mechanism and a jacking mechanism which are arranged in an inner cavity of the limiting rod, the jacking mechanism comprises symmetrically arranged jacking blocks, rollers are arranged at the ends, close to each other, of the two jacking blocks, and a reset spring is arranged between each jacking block and the limiting rod; the clamping body is provided with a plurality of sleeves, and the other ends of the jacking blocks, which are far away from each other, are opposite to the sleeves.

The winding clamp comprises a fixed seat, a fixed thread sleeve is arranged at one end of the fixed seat, a sliding thread sleeve is arranged at the other end of the fixed seat, mirror symmetry L-shaped rods are arranged at the upper ends of the fixed thread sleeve and the sliding thread sleeve, an adjusting rod is arranged in the fixed thread sleeve and the sliding thread sleeve, one end of the adjusting rod, located on the fixed thread sleeve, is smooth, and one end of the adjusting rod, located on the sliding thread sleeve, is provided with a thread. The fixed thread bush is limited in the ring groove of the adjusting rod, and the sliding thread bush is in threaded connection with the adjusting rod.

Grounding wires are arranged at the voltage limiting device, between the voltage limiting device and the residual cable disc and at three positions of a gantry rod at the lower end of the residual cable disc, the OPGW optical cable is grounded through a parallel groove wire clamp and the grounding wires, the second point grounding wire and the three-point grounding wire are connected to an upper port of a grounding disconnecting link, and a lower port is connected to a grounding network of a transformer substation through a 150mm grounding wire.

A method for installing residual single-rod double-cable OPGW cables of a transformer substation comprises the following steps:

1) and the OPGW optical cable is installed under the lead: the upper part, the wood load platform and the lower part of the gantry rod are respectively provided with a plurality of pin pulling rod hoops, U-shaped fixtures and a plurality of herringbone rod hoops, two voltage limiting devices are symmetrically arranged on the pin pulling rod hoop at the top end of the gantry rod, pin insulators are symmetrically arranged on two sides of other pin pulling rod hoops, U-shaped fixtures and herringbone rod hoops, and 2 OPGW optical cables are fixed and led down on the voltage limiting devices and the insulators.

2) And installing the residual OPGW optical cable: the wire winding groove in the wire winding clamp is adjusted to be proper in size in advance, the semicircular hoops on the support body in bilateral symmetry are connected with the gantry rod, the insulating wire winding clamps are fixed on the support body through bolts, the redundant part of the lower portion of the OPGW optical cable is wound on the residual cable tray, and the lower end connecting portion of the OPGW optical cable is connected with a communication machine room through an OPGW optical cable insulating joint box.

3) And three points are grounded: at the top end of the gantry rod, before an OPGW optical cable enters an insulated residual cable inventory rack and before the OPGW optical cable enters an OPGW connector box, a parallel groove wire clamp and a grounding wire are adopted for carrying out three-point grounding, a second point and the three-point grounding wire are connected to an upper port of a grounding disconnecting link, a lower port is connected to a grounding network of a transformer substation through a 150mm grounding wire, the disconnecting link is not disconnected and kept connected in a general working state, and the grounding disconnecting link is disconnected when the transformer substation is subjected to annual insulation supervision detection and resistance measurement of the grounding network of the transformer substation.

The invention discloses a single-rod double-cable OPGW (optical fiber composite overhead ground wire) residual cable installation fitting and an installation method for a transformer substation, which have the following technical effects:

1) the cable is drawn down to current OPGW adopts steel band staple bolt or rubber clamp and door type pole fixed, and steel band staple bolt, OPGW optical cable and door type pole direct contact, and the fixed OPGW of rubber clamp draws down the cable unreliable, consequently has the OPGW to draw down the cable electric corrosion and burn the cable hidden danger. The symmetrical hoop, the U-shaped fixture and the pin insulator are fixed, so that the OPGW optical cable is reliably insulated from the gantry rod, and the problem of strand breakage of the electrical corrosion cable of the OPGW optical cable is solved.

2) When the existing transformer substation adopts a single-rod double-OPGW optical cable, the top of the portal rod adopts a strain clamp to pull the OPGW optical cable and lead down, the OPGW optical cable adopts a parallel groove clamp and a grounding wire to be connected with the ground of the portal rod at a first grounding point, and thus the inconvenient follow-up transformer substation is subjected to annual insulation supervision and inspection and transformer substation grounding grid resistance detection. The OPGW voltage limiting device is additionally arranged at the top end of the gantry rod and is matched with the three-point grounding technology behind to ensure that the OPGW optical cable is reliably grounded, the discharge strand breakage is prevented, and the problems of annual insulation supervision and inspection of the transformer substation and pole climbing operation of detecting the resistance of a grounding grid of the transformer substation are solved.

3) Through two OPGW optical cables of business turn over at one set of longmen pole, the OPGW optical cable of business turn over transformer substation is whole insulating, and insulating reliable, has solved the not enough problem in compact transformer substation space.

4) The installation of the existing OPGW residual cable reel is made of metal materials, when an outer disc type reel cable is adopted, the OPGW optical cable and the residual cable rack easily form inductance, and the coiled OPGW optical cable easily generates turn-to-turn discharge. The detachable and adjustable insulation residual cable tray is arranged, the customized installation frame body is firstly installed at the appointed position of the gantry rod, then 2 sets of OPGW residual cable trays are symmetrically fixed on two sides of the electric single rod, the frame body and the winding clamp are installed for two times, the weight is light, the construction is convenient, the OPGW optical cable joint box is installed on the left side of the OPGW residual cable tray hardware fitting, and the grounding switch is installed on the right side of the OPGW residual cable tray hardware fitting, so that a large amount of space can be saved; not only the installation, the disassembly and the maintenance are convenient, but also the inter-turn discharge phenomenon is avoided.

5) The two OPGW optical cables are installed simultaneously, so that the space utilization rate of the urban compact substation is improved, the safe operation rate of the urban compact substation OPGW terminal is improved, the installation efficiency is improved, the safe production of a power grid is promoted, and the construction cost of the power grid is reduced.

6) The single-rod double-cable down-leading hardware fitting is an integrated integral design, reduces the engineering cost, facilitates the field construction and installation, and improves the safety and reliability.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic diagram of the present invention.

Fig. 2 is a schematic view at a in fig. 1.

Fig. 3 is a schematic view at B in fig. 1.

Fig. 4 is a schematic view at C in fig. 1.

Fig. 5 is a schematic view of a mount of the present invention.

Fig. 6 is a schematic view of the remaining cable reel of the present invention.

Fig. 7 is a schematic view of a wire-wound clamp of the present invention (first type).

Fig. 8 is an internal schematic view of a wire clip of the present invention (first).

Fig. 9 is a schematic view of a wire-wound clamp of the present invention (second type).

Fig. 10 is a schematic view of the present invention after installation.

In the figure: the device comprises a gantry rod 1, a pressure limiting device 2, a cable guiding device 3, a residual cable tray 4, a clamp body 5, a winding groove 6, a limiting bolt 7, an adjusting hole 8, a pin rod hoop 9, a wood platform 10, a U-shaped clamp 11, a herringbone rod hoop 12, a needle insulator 13, a left hoop 14, a right hoop 15, a supporting rod 16, a U-shaped fixed seat 17, a locking bolt 18, a clamping head 19, a mounting rack 20, a cable winding clamp 21, a rack body 22, a semicircular hoop 23, a positioning plate 24, a positioning rod 25, a limiting rod 26, a sliding block 27, a gear rack mechanism 28, a tightening mechanism 29, a tightening block 30, a roller 31, a reset spring 32, a fixed seat 33, a fixed threaded sleeve 34, a sliding threaded sleeve 35, an L-shaped rod 36, an adjusting rod 37, a sleeve 38, a parallel groove clamp 39, a grounding wire 40, a grounding knife brake 41 and a connector box 42.

Detailed Description

As shown in fig. 1-2, a single-rod double-cable OPGW residual cable installation fitting for a transformer substation is characterized in that a pair of OPGW voltage limiting devices 2 is added at a position 100mm above a first grounding point of a gantry rod 1, and the installation position of each OPGW voltage limiting device 2 needs to be designed according to the direction of an OPGW optical cable entering and exiting a transformer substation. The voltage limiting device 2 adopts the patent with the application number of 201610481924, namely 'an OPGW terminal voltage limiting device for an elegant transformer substation', and the voltage limiting device comprises a main body, wherein an insulating support body and an insulating support body are arranged on the main body. The device can provide safety protection for gantry framework OPGW composite cable, has avoided causing the response electricity to OPGW optical cable broken strand by the thunderbolt, and OPGW composite cable is insulating to between the longmen pole, and the high-pressure response electricity in the effective isolated transformer substation has avoided the high-pressure response electricity to corrode the broken strand hidden danger of OPGW composite cable. The lower end of the gantry rod 1 is provided with a plurality of pairs of cable guiding devices 3, each cable guiding device 3 comprises a plurality of pin pulling rod hoops 9 arranged on the main rod of the upper part of the gantry rod 1, a U-shaped fixture 11 arranged on the wood platform 10 and a plurality of herringbone rod hoops 12 arranged on the single support rod of the lower part of the gantry rod 1, and pin insulators 13 are fixed on the pin pulling rod hoops 9, the U-shaped fixture 11 and the herringbone rod hoops 12. The OPGW downlead cable is firstly fixed on the OPGW pressure limiting device; when the wood load platform is pulled downwards, a U-shaped fixture is used for fixing the pin insulator at the position of the wood load platform, and an OPGW leading-down cable is fixed on the pin insulator; when the cable is arranged below the wood load platform, the herringbone rod hoop is used for fixing the pin insulator, and the OPGW leading-down cable is fixed on the insulator, so that the OPGW leading-down cable is ensured to be reliably insulated, and the problem of strand breakage of the OPGW optical cable due to electric corrosion and cable burning is solved. The lower side of gantry rod 1 is equipped with the surplus cable dish 4 of pair, and the mounting bracket 20 mounted position of the surplus cable dish of first set OPGW leaves 1920mm eminence on ground, and the surplus cable dish of second set OPGW uses first set as the benchmark, and the symmetry is installed. The 2 sets of OPGW excess cable tray mounting racks 20 are directly sleeved on two sides of the mounting hoop and are screwed with fastening bolts, and the mounting hoop is locked with the gantry rod. Every mounting bracket 20 is gone up the circumference and all is equipped with 4 wire winding clamps 21, and wire winding clamp 21 adopts insulating nonmagnetic material, like this when twining surplus cable, avoids producing turn-to-turn and discharges.

The problem of insufficient space of a compact transformer substation is solved by the method for installing the single-rod double-cable OPGW residual cables, one set of gantry rod can enter and exit 2 OPGW optical cables, and the OPGW optical cables entering and exiting the transformer substation are all insulated and reliable in insulation.

The OPGW optical cable joint box is arranged on the left side of the OPGW residual cable disc, and the grounding knife switch is arranged on the right side of the OPGW residual cable disc. The OPGW optical cable is provided with a first point ground at the OPGW pressure limiting device 2 at the top end of the gantry beam, and when lightning induced electricity is too large and can not be unloaded through the OPGW pressure limiting device 2 in a short time, the lightning induced electricity can be unloaded through a ground wire; before the OPGW optical cable enters the insulation residual cable inventory rack, a parallel groove clamp and a grounding wire are adopted for second point grounding; the OPGW optical cable comes out of the insulated residual cable tray, a parallel groove wire clamp and a grounding wire are adopted for carrying out third point grounding before entering the OPGW joint box, the second point grounding wire and the three point grounding wire are connected to an upper port of a grounding switch, a lower port is connected to the grounding network of the transformer substation through the 150mm grounding wire, the switch is generally not disconnected and keeps on, the grounding switch is disconnected when the transformer substation carries out annual insulation supervision detection and measures the resistance of the grounding network of the transformer substation, the pole climbing operation risk is avoided, the working efficiency is improved, and the detection power failure time is shortened.

In addition, the voltage limiting device is matched with a three-point grounding technology, and the two technologies supplement each other to form double guarantee, so that the discharge strand breakage can be effectively prevented, and the problems of annual insulation supervision and inspection of the transformer substation and the pole climbing operation of detecting the resistance of the grounding grid of the transformer substation are solved.

The taper rod hoop 9 and the herringbone rod hoop 12 both comprise a left hoop 14 and a right hoop 15, and the left end and the right end of the left hoop 14 and the right hoop 15 are locked through bolts. Wherein the front and back ends of the anchor ear 9 of the pin-pulling rod are locked with the pins of the support rods 16, the two support rods are arranged in a mirror symmetry way, and the pressure limiting device is arranged on the upper surface of the anchor ear of the pin-pulling rod to form a straight line with the anchor ear of the pin-pulling rod; the front end and the rear end of the herringbone rod hoop 12 are fixedly connected with the supporting rod 16, and the herringbone rod hoop is vertically installed with the pin insulator, so that installation points at two ends of the pin pulling rod hoop and installation points at two ends of the herringbone rod hoop are kept consistent in the installation process, the OPGW optical cable is naturally laid downwards, large bending or torsional stress caused by winding is avoided, and the phenomenon that strand breakage is caused or the strength of the OPGW optical cable is reduced is avoided. U type fixture 11 includes U type fixing base 17, installs locking bolt 18 on the U type fixing base 17, and dop 19 is installed to locking bolt 18 end, realizes the installation of insulator through the mode of friction locking, avoids punching like this, guarantees intensity.

Through setting up pin-out pole staple bolt, herringbone pole staple bolt and U type fixture, and the mounted position sets up rationally and cooperates with pin insulator, guarantees that OPGW optical cable lays downwards naturally, insulating reliable.

The surplus cable dish 4 in pairs includes mounting bracket 20, and mounting bracket 20 both sides are equipped with a plurality of winding clamps 21 of being made by insulating nonmagnetic material, mounting bracket 20 includes both sides support body 22, and both sides support body 22 all is equipped with semicircle staple bolt 23 from top to bottom, and upper and lower semicircle staple bolt 23 is relative and locks on longmen pole 1. Be equipped with positioner on semicircle staple bolt 23, positioner is equipped with the locating hole including setting up at the locating plate 24 of one side semicircle staple bolt 23 lower extreme on locating plate 24, and another semicircle staple bolt 23 lower extreme that corresponds is equipped with locating lever 25, and the 25 ends of locating lever are equipped with the bouncing ball, through locating plate and locating lever lock, realize the location of staple bolt both ends hole once, need not the adjustment, and can share partial tension force after the location straining, guarantee to lock and avoid the pine to take off. During installation, the positioning is realized through the semicircular hoop, the quick positioning is realized through the positioning device, the quick locking of the high-altitude hoop is realized, the time of high-altitude operation is shortened, the air operation difficulty and the labor intensity are reduced, the operation efficiency is improved, and the safety is ensured.

The winding clamp 21 comprises a clamp body 5, one end of the clamp body 5 is in bolt connection with the frame body 22, the other end of the clamp body is provided with a winding groove 6, the winding groove 6 is provided with a limiting mechanism, and the limiting mechanism realizes the fixation of the residual cables; the limiting mechanism comprises a limiting bolt 7, and the limiting bolt 7 is adjusted and limited through a plurality of adjusting holes 8 in the clamp body 5. The mechanism can adjust the storage size of the residual cable rack according to the field condition, is convenient to transform and replace, has lighter weight and is convenient for batch production and processing.

Or, another limiting mechanism is adopted, the limiting mechanism comprises a limiting rod 26, and the limiting rod 26 slides on the clamp body 5 through sliding blocks 27 above and below the limiting rod and is clamped through a clamping mechanism. The two ends of the sliding block are arc-shaped, so that the friction resistance can be reduced, the upper and lower clamps 5 are respectively provided with a sliding rail, the limiting rod is connected with the clamps in a sliding manner through the upper and lower sliding blocks 27, and the limiting rod can be ensured to stably and fixedly slide back and forth along the winding groove of the winding clamp, so that the size of the winding groove is limited. The clamping mechanism comprises a gear rack mechanism 28 and a jacking mechanism 29 which are arranged in the inner cavity of the limiting rod 26, the jacking mechanism 29 comprises symmetrically arranged jacking blocks 30, one ends of the two jacking blocks 30, which are close to each other, are provided with rollers 31, and a return spring 32 is arranged between the jacking blocks 30 and the inner cavity of the limiting rod 26; the clamp body 5 is provided with a plurality of sleeves 38, and the other ends of the jacking blocks 30, which are far away from each other, are opposite to the sleeves 38. When the locking device slides to a certain position and needs to be locked, the handle in the middle of the limiting rod is rotated, the handle is connected with the center of the driving pinion, the driving pinion is meshed with the gear rack mechanism, the rack is driven to move up and down by rotating the pinion, and therefore the jacking block at one end can be ejected out and clamped into the sleeve. Compared with the former mode, the mechanism not only can adjust the size of the winding groove, so that the installation is more flexible and compact, but also is more convenient and quicker during installation, and the main adjusting part of the clamping mechanism is arranged inside the limiting rod and is not easy to embroider, and the mechanism is easier to take down when being maintained and disassembled.

The wire winding clamp 21 comprises a fixed seat 33, the lower end of the fixed seat 33 is locked with the frame body through a bolt, a fixed threaded sleeve 34 is arranged at one end of the fixed seat 33, a sliding threaded sleeve 35 is arranged at the other end of the fixed seat 33 through a ball, the sliding threaded sleeve 35 slides along a sliding track, and the sliding threaded sleeve is relatively close to or far away from the fixed threaded sleeve 34. The upper ends of the fixed threaded sleeve 34 and the sliding threaded sleeve 35 are welded with mirror-symmetric L-shaped rods 36, adjusting rods 37 are arranged in the fixed threaded sleeve 34 and the sliding threaded sleeve 35, one end of each adjusting rod 37, which is located on the fixed threaded sleeve, is smooth, and one end, which is located on the sliding threaded sleeve, is provided with threads. The fixed thread bush is limited in the ring groove of the adjusting rod, and the sliding thread bush is in threaded connection with the adjusting rod. When the installation, rotatable regulation pole, both ends L type pole is kept away from relatively like this, twines OPGW optical cable around the L type pole of fixed thread cover end, and the pole is adjusted in the rotation after the installation is accomplished, adjusts and locks through the snap ring after the suitable position.

Grounding wires are arranged at the voltage limiting device 2, between the voltage limiting device 2 and the residual cable disc 4 and at three positions of a gantry rod at the lower end of the residual cable disc 4, the OPGW optical cable is grounded through a parallel groove wire clamp 39 and a grounding wire 40, the second point grounding wire and the three-point grounding wire are connected to an upper port of a grounding switch 41, and a lower port is connected to a grounding network of a transformer substation through a 150mm grounding wire.

A method for installing residual single-rod double-cable OPGW cables of a transformer substation comprises the following steps:

1. the OPGW optical cable is installed under the lead: the upper part, the wood load platform and the lower part of the gantry rod are respectively provided with a plurality of pin pulling rod hoops, U-shaped fixtures and a plurality of herringbone rod hoops, two voltage limiting devices are symmetrically arranged on the pin pulling rod hoop at the top end of the gantry rod, pin insulators are symmetrically arranged on two sides of other pin pulling rod hoops, U-shaped fixtures and herringbone rod hoops, and 2 OPGW optical cables are fixed and led down on the voltage limiting devices and the insulators. Thus, the OPGW optical cable is led down from the top end of the gantry rod, the OPGW voltage limiting device and the pin insulator are fixed by adopting a tapered rod hoop, and the OPGW lead-down cable is fixed on the OPGW voltage limiting device and the insulator; fixing a pin insulator by using a U-shaped fixture at the position of the wood load platform, and fixing an OPGW (optical fiber composite overhead ground wire) down-leading cable on the pin insulator; a herringbone rod hoop is used below the wood load platform to fix a pin insulator, and an OPGW leading-down cable is fixed on the insulator. And the reliable insulation of the OPGW down-leading cable is ensured.

2. And (3) installing the residual OPGW optical cable: the wire winding groove in the wire winding clamp is adjusted to be in a proper size in advance, the semicircular hoops on the support body in bilateral symmetry are quickly connected with the gantry rod through the positioning mechanisms, then the insulating wire winding clamps are fixed on the support body through bolts, the redundant part of the lower portion of the OPGW optical cable is wound on the residual cable tray, and the lower end connecting portion of the OPGW optical cable is connected with a communication machine room through the OPGW optical cable insulating joint box. The remaining cable frame of the OPGW of first set of customization installation staple bolt mounted position is 1920mm high from ground, and the remaining cable frame of the OPGW of second set of customization installation staple bolt uses first set as the benchmark, adopts the installation staple bolt frock to fix a position the installation fast, and the remaining cable of 2 sets of OPGW is coiled and is deposited the frame and directly overlap in the remaining cable frame of customization OPGW installation staple bolt both sides and screw up fastening bolt can, and remaining cable frame atress is less, and the quality is light, simple to operate. The earthing knife switch is installed on the right side of the rear portion of the OPGW residual cable inventory rack, and enough space is ensured between the earthing knife switch and metal plates such as a gantry rod and a residual cable rack.

3. Three points are grounded: at the top end of the gantry rod, before an OPGW optical cable enters an insulated residual cable inventory rack and before the OPGW optical cable enters an OPGW connector box, a parallel groove wire clamp and a grounding wire are adopted for carrying out three-point grounding, a second point and the three-point grounding wire are connected to an upper port of a grounding disconnecting link, a lower port is connected to a grounding network of a transformer substation through a 150mm grounding wire, the disconnecting link is not disconnected and kept connected in a general working state, and the grounding disconnecting link is disconnected when the transformer substation is subjected to annual insulation supervision detection and resistance measurement of the grounding network of the transformer substation. The OPGW optical cable is grounded at the first point of the OPGW voltage limiting device at the top end of the gantry beam, and can be unloaded through a grounding wire when lightning induction electricity is too large and cannot be unloaded through the OPGW voltage limiting device in a short time; before the OPGW optical cable enters the insulation residual cable inventory rack, a parallel groove clamp and a grounding wire are adopted for second point grounding; the OPGW optical cable is taken out of the insulated residual cable storage rack, a third point is carried out by adopting a parallel wire and a grounding wire before entering the OPGW connector box, the second point and the three-point grounding wire are connected to the upper port of the grounding disconnecting link, the lower port is connected to the grounding network of the transformer substation by adopting the 150mm grounding wire, the disconnecting link is generally not disconnected and keeps on, the grounding disconnecting link is disconnected when the transformer substation carries out annual insulation supervision detection and measures the resistance of the grounding network of the transformer substation, the pole climbing operation risk is avoided, the working efficiency is improved, and the detection power failure time is shortened.

Claims (6)

1. The utility model provides a surplus cable installation gold utensil of single pole two cable OPGW of transformer substation which characterized in that: the gantry crane cable storage device comprises a gantry rod (1), wherein a paired pressure limiting device (2), a paired cable guiding device (3) and a paired residual cable tray (4) are sequentially arranged on the gantry rod from top to bottom, the paired pressure limiting device (2), the paired cable guiding device (3) and the paired residual cable tray (4) jointly form 2 sets of OPGW residual cable tray storage fittings, and two OPGW optical cables sequentially pass through the pressure limiting device (2) of each set of OPGW residual cable tray storage fittings and insulators on the cable guiding device (3) and are wound on the residual cable tray (4); the gantry rod (1) is also provided with a three-point grounding device, and cable protection and annual insulation supervision detection and measurement are carried out through the cooperation of the three-point grounding device and the voltage limiting device (2);

the paired residual cable drums (4) comprise mounting frames (20), a plurality of winding clamps (21) made of insulating nonmagnetic materials are arranged on two sides of each mounting frame (20), each mounting frame (20) comprises two side frame bodies (22), semicircular hoops (23) are arranged above and below the two side frame bodies (22), and the upper semicircular hoops and the lower semicircular hoops (23) are opposite and locked on the gantry rod (1);

the wire winding clamp (21) comprises a clamp body (5), one end of the clamp body (5) is in bolt connection with the frame body (22), a wire winding groove (6) is formed in the other end of the clamp body, a limiting mechanism is arranged on the wire winding groove (6), and the limiting mechanism realizes the fixation of the residual cables; the limiting mechanism comprises a limiting rod (26), and the limiting rod (26) slides on the clamp body (5) through sliding blocks (27) at two ends and is clamped through a clamping mechanism;

the clamping mechanism comprises a gear rack mechanism (28) and a jacking mechanism (29) which are arranged in an inner cavity of the limiting rod (26), the jacking mechanism (29) comprises symmetrically arranged jacking blocks (30), one ends, close to each other, of the two jacking blocks (30) are provided with rollers (31), and a return spring (32) is arranged between each jacking block (30) and the limiting rod (26); the clamping body (5) is provided with a plurality of sleeves (38), and the other ends, far away from each other, of the jacking blocks (30) are opposite to the sleeves (38).

2. The single-rod double-cable OPGW (optical fiber composite overhead ground wire) residual cable installation fitting of the transformer substation according to claim 1, characterized in that: the cable guiding device (3) comprises a plurality of pin pulling rod hoops (9) arranged on the upper portion of the gantry rod (1), U-shaped fixtures (11) arranged on the timber platform (10) and a plurality of herringbone rod hoops (12) arranged on the lower portion of the gantry rod (1), wherein needle type insulators (13) are fixed on the pin pulling rod hoops (9), the U-shaped fixtures (11) and the herringbone rod hoops (12).

3. The single-rod double-cable OPGW (optical fiber composite overhead ground wire) residual cable installation fitting of the transformer substation according to claim 2, characterized in that: the pin pulling rod hoop (9) and the herringbone rod hoop (12) comprise a left hoop (14) and a right hoop (15), the left ends and the right ends of the left hoop (14) and the right hoop (15) are locked through bolts, the front end and the rear end of the pin pulling rod hoop (9) are locked with clamping pins of the support rod (16), and the front end and the rear end of the herringbone rod hoop (12) are fixedly connected with the support rod (16); the U-shaped fixture (11) comprises a U-shaped fixing seat (17), a locking bolt (18) is installed on the U-shaped fixing seat (17), and a clamping head (19) is installed at the end of the locking bolt (18).

4. The single-rod double-cable OPGW (optical fiber composite overhead ground wire) residual cable installation fitting of the transformer substation according to claim 1, characterized in that: be equipped with positioner on semicircle staple bolt (23), positioner is equipped with the locating hole including setting up locating plate (24) at one side semicircle staple bolt (23) lower extreme on locating plate (24), and another semicircle staple bolt (23) lower extreme that corresponds is equipped with locating lever (25), and locating lever (25) end is equipped with the bouncing ball.

5. The single-rod double-cable OPGW (optical fiber composite overhead ground wire) residual cable installation fitting of the transformer substation according to claim 1, characterized in that: grounding wires are arranged at the position of the voltage limiting device (2), between the voltage limiting device (2) and the residual cable disc (4) and at three positions of a gantry rod at the lower end of the residual cable disc (4), an OPGW optical cable is grounded through a parallel groove wire clamp (39) and a grounding wire (40), a second point grounding wire and a three-point grounding wire are connected to an upper port of a grounding disconnecting link (41), and a lower port is connected to a grounding network of a transformer substation through a 150mm grounding wire.

6. The method for installing the single-rod double-cable OPGW (optical fiber composite overhead ground wire) residual cable of the transformer substation according to any one of claims 1 to 5, wherein the method comprises the following steps: the method comprises the following steps:

1) and the OPGW optical cable is installed under the lead: a plurality of pin pulling rod hoops are arranged on the upper part of the gantry rod, a U-shaped fixture is arranged at the position of the timber platform, and a plurality of herringbone rod hoops are arranged on the lower part of the gantry rod; two voltage limiting devices are symmetrically arranged on a pin-pulling rod hoop at the top end of the gantry rod, pin insulators are symmetrically arranged on two sides of other pin-pulling rod hoops, U-shaped fixtures and herringbone rod hoops, and 2 OPGW optical cables are fixed and led down on the voltage limiting devices and the insulators;

2) and installing the residual OPGW optical cable: adjusting a wire winding groove in a wire winding clamp to a proper size in advance, connecting semicircular hoops on a frame body which is symmetrical left and right with a gantry rod, fixing a plurality of insulated wire winding clamps on the frame body through bolts, winding redundant parts at the lower part of an OPGW optical cable on a redundant cable disc, and connecting the lower end connecting part of the OPGW optical cable with a communication machine room through an OPGW optical cable insulated joint box;

3) and three points are grounded: at the top end of the gantry rod, before an OPGW optical cable enters an insulated residual cable inventory rack and before the OPGW optical cable enters an OPGW connector box, a parallel groove wire clamp and a grounding wire are adopted for carrying out three-point grounding, a second point and the three-point grounding wire are connected to an upper port of a grounding disconnecting link, a lower port is connected to a grounding network of a transformer substation through a 150mm grounding wire, the disconnecting link is not disconnected and kept connected in a general working state, and the grounding disconnecting link is disconnected when the transformer substation is subjected to annual insulation supervision detection and resistance measurement of the grounding network of the transformer substation.

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