CN206400166U - Cable fitting more than a kind of double cable OPGW of transformer station's single pole - Google Patents

Abstract

A substation single-rod double-cable OPGW residual cable installation fitting, including a pair of pressure limiting devices, a pair of lead cable devices and a pair of residual cable reels, which are sequentially arranged on the gantry pole from top to bottom, paired pressure limiting devices, paired The lead cable device and the paired remaining cable reels together constitute 2 sets of OPGW remaining cable storage fittings, and the two OPGW optical cables pass through the pressure limiting device of each set of OPGW remaining cable reel fittings and the insulator of the leading cable device in turn, and are wound on the remaining cable reels . The utility model provides a substation single-rod double-cable OPGW residual cable installation fitting. By setting 2 sets of voltage limiting devices, leading cable devices and paired residual cable reels, the single-rod double-cable insulation installation is realized, which solves the problem of compact substation space. Insufficient problem.

Description

A substation single-rod double-cable OPGW residual cable installation fitting

technical field

The utility model relates to a fitting for installing OPGW remaining cables, in particular to a fitting for installing single-rod and double-cable OPGW remaining cables in a substation.

Background technique

At present, some compact substations built by the power sector have many high-voltage cables entering and exiting, and the phase wires are relatively independent. Once entering the substation, they are fixed on the horizontal frame of the portal frame, and the phase wires are separated by spacers. The door rod is led up and down, and the ADSS optical cable is welded to enter the communication room of the substation. Generally, a 500kV substation corresponds to a 220kV substation with 10 lines, and a 220kV substation corresponds to a 110kV substation with 10 lines. Due to the limited number of portal frames, installing an OPGW optical cable on a portal pole cannot meet the installation and construction requirements of a compact substation. . When two OPGW optical cables are installed with a portal pole, the OPGW optical cables enter the substation and are led down from the top of the gantry frame. "Q/GDW758-2012 Installation Process Specifications for Communication Optical Cables in Power Systems" uses rubber clamps to connect the OPGW optical cables to the gantry frame. Keep the insulation fixed. When the OPGW optical cable reaches a height of 2.5 meters from the ground, set up a set of metal residual cable racks. The metal residual cable racks are used for inventorying redundant OPGW optical cables, fixing OPGW splice boxes, and inventorying redundant common optical cables. Between the metal residual cable racks and the gantry frame The use of rubber pads for insulation solves the problem of insulation and grounding of the remaining cable racks in a short period of time. However, rubber clamps and rubber pads used in substations will accelerate rubber oxidation, and the insulation between the metal residual cable racks and the gantry frame is unreliable, which is likely to cause OPGW optical cables. Inter-turn discharge broken strands.

At present, the OPGW optical cable installation hardware in the power system substation is made of all metal materials. Once the remaining cable rack is damaged, it is not easy to replace and repair; the current remaining cable rack and the remaining cable storage diameter are customized and cannot be adjusted. The remaining cable cannot be adjusted according to the actual situation on site. Disc diameter.

Contents of the invention

The technical problem to be solved by the utility model is to provide a substation single-rod double-cable OPGW residual cable installation fittings. By setting the single-rod double-cable installation mode, the problem of insufficient space in the compact substation is solved. In addition, the pressure limiting device and The three-point grounding technology ensures the reliable grounding of OPGW optical cables, prevents strand breakage due to discharge, and solves the problems of annual insulation supervision and inspection of substations and detection of grounding network resistance of substations.

In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:

A substation single-rod double-cable OPGW residual cable installation fittings, including paired pressure limiting devices, paired lead cable devices and The lead cable device and the paired remaining cable reels together constitute 2 sets of OPGW remaining cable storage fittings, and the two OPGW optical cables pass through the pressure limiting device of each set of OPGW remaining cable reel fittings, the insulator of the leading cable device, and are wound on the remaining cable reels .

The paired pressure limiting devices are symmetrically installed on the gantry pole. The pressure limiting device includes a main body, and a high-voltage arc striking rod and a low-voltage arc striking rod are arranged on one side of the main body. ball, two discharge balls are close to each other.

The lead cable device includes a plurality of hoops mounted on the upper part of the gantry pole, a U-shaped fixture installed on the wooden platform, and a plurality of hoops installed on the lower part of the gantry pole. Pin insulators are fixed on the hoop, U-shaped clamp and herringbone pole hoop.

The hoops of the pulling rod and the hoop of the herringbone rod all include a left hoop and a right hoop, and the left and right ends of the hoop are locked by bolts, wherein the front and rear ends of the hoop of the pulling rod are connected to the The bayonet pin is locked, and the front and rear ends of the hoop of the herringbone rod are fixedly connected with the support rod.

The U-shaped fixture includes 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 paired remaining cable reels include mounting frames, which are symmetrically arranged on both sides of the hoop, and each mounting frame is provided with a plurality of winding clips in the upper direction.

The winding clip is made of insulating and non-magnetic material. The winding clip includes a clip body. The clip head of the clip body is arranged on the mounting frame. In the annular space, it is fixed by the bolts above and below the groove. The clamp body above and below the groove is provided with a plurality of through holes along the length direction, and the bolts pass through the through holes to realize the adjustment of the diameter of the remaining cable coil.

Grounding wires are provided at the pressure limiting device, between the pressure limiting device and the remaining cable reel, and at the gantry pole at the lower end of the remaining cable reel, and the OPGW optical cable is grounded through parallel trench wires and grounding wires.

The utility model is a substation single-rod double-cable OPGW residual cable installation fitting, which has the following technical effects:

1) The OPGW optical cable is reliably insulated from the gantry pole through symmetrical hoops, U-shaped clamps and pin insulators, which solves the problem of OPGW optical cable electric erosion, burning, and broken strands.

2) By adding an OPGW voltage limiting device on the top of the gantry pole and cooperating with the following three-point grounding technology to ensure the reliable grounding of the OPGW optical cable and prevent strand breakage due to discharge, the problems of substation annual insulation supervision and inspection and detection of substation grounding network resistance climbing poles are solved .

3) By passing two OPGW optical cables in and out of a set of gantry poles, the OPGW optical cables entering and leaving the substation are all insulated, and the insulation is reliable, which solves the problem of insufficient space in compact substations.

4) By setting the detachable and adjustable insulating residual cable reel, it not only makes installation, disassembly and maintenance convenient, but also avoids inter-turn discharge phenomenon.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Fig. 1 is the front view of the utility model.

Fig. 2 is a left view of the utility model.

Fig. 3 is a schematic diagram of the pressure limiting device in the present invention.

Fig. 4 is a schematic diagram of the hoop of the pulling rod in the utility model.

Fig. 5 is a schematic diagram of a herringbone rod hoop in the present invention.

Fig. 6 is a schematic diagram of a U-shaped fixture in the present invention.

Fig. 7 is the front view of the remaining cable reel in the utility model.

Fig. 8 is a left view of the remaining cable reel in the utility model.

Fig. 9 is a top view of the remaining cable reel in the utility model.

Fig. 10 is a schematic diagram of the winding clip in the present invention.

In the figure: gantry pole 1, pressure limiting device 2, lead cable device 3, remaining cable reel 4, main body 5, high-voltage arc striking rod 6, low-voltage arc striking rod 7, discharge ball 8, tip rod hoop 9, wooden pole Platform 10, U-shaped clamp 11, herringbone rod hoop 12, pin insulator 13, left hoop 14, right hoop 15, support rod 16, U-shaped holder 17, locking bolt 18, chuck 19, Mounting frame 20 , winding clip 21 , clip body 22 , groove 23 , through hole 24 , OPGW optical cable 25 , ground wire 26 , parallel groove clamp 27 , and optical cable junction box 28 .

detailed description

As shown in Figure 1-10, a substation single-rod double-cable OPGW residual cable installation fittings, a pair of OPGW pressure limiting devices are added 100mm above the first grounding point of the gantry pole 1, and the installation orientation of each OPGW pressure limiting device needs to be based on The direction design of OPGW optical cable entering and leaving the substation. The lower end of the gantry pole 1 is provided with a pair of guide cable devices 3, including the guide cable device 3 including a plurality of tipping rod hoops 9 installed on the upper part of the gantry pole 1, and a U-shaped clamp installed on the wooden platform 10. 11 and a plurality of herringbone bar hoops 12 installed on the lower part of the gantry bar 1, pin insulators 13 are all fixed on the tip bar hoops 9, U-shaped clamps 11 and herringbone bar hoops 12. The OPGW down-conductor cable is first fixed on the OPGW pressure limiting device; when pulling down, use a U-shaped clamp to fix the pin insulator at the position of the wooden platform, and the OPGW down-conductor cable is fixed on the pin insulator; when it is below the wooden platform , Use the herringbone pole hoop to fix the pin type insulator, and the OPGW downcomer cable is fixed on the insulator, so as to ensure the reliable insulation of the OPGW downconductor cable, and solve the problem of OPGW optical cable electric erosion, burning and broken strands. A pair of remaining cable reels 4 are arranged below the gantry pole 1. The mounting frame 20 of the first set of OPGW remaining cable reels is installed at a height of 1920mm from the ground, and the second set of OPGW remaining cable reels is symmetrically installed based on the first set. 2 sets of OPGW residual cable reel installation frames 20 are directly placed on both sides of the installation hoop and the fastening bolts are tightened, and the installation hoop is locked with the gantry pole. Each installation frame 20 is provided with four winding clips 21 in the circumferential direction, and the winding clips 21 are made of insulating and non-magnetic materials, so as to avoid generation of inter-turn discharge when winding the remaining cables.

The problem of insufficient space in compact substations is solved by the single-rod double-cable OPGW redundant cable installation method, which can meet the requirements of a set of gantry poles for entering and exiting two OPGW optical cables, and the OPGW optical cables entering and exiting the substation are all insulated, and the insulation is reliable.

In addition, the OPGW optical cable splice box is installed on the left side of the OPGW remaining cable tray, and the grounding switch is installed on the right side of the OPGW remaining cable tray. The OPGW optical cable is grounded at the first point of the OPGW voltage limiting device 2 at the top of the gantry pole. When the lightning induced current is too large to be unloaded through the OPGW voltage limiting device 2 in a short time, it can be unloaded through the grounding wire 26; the OPGW optical cable enters the insulation remaining cable inventory Before the rack, use the parallel groove clamp 27 and the ground wire 26 to ground the second point; the OPGW optical cable comes out of the insulated cable reel, and before entering the OPGW splice box, use the parallel groove clamp and the ground wire to carry out the third point grounding, and the second point , The three-point grounding wire is connected to the upper port of the grounding knife switch, and the lower port is connected to the grounding network of the substation with a 150mm² grounding wire. The knife switch is generally not disconnected and kept on. In the substation, do annual insulation supervision and inspection, and measure the resistance of the substation grounding network. Open the grounding knife switch to avoid the risk of pole climbing operation, improve work efficiency, and reduce the detection power failure time.

The paired pressure limiting devices 2 are symmetrically installed on the gantry pole 1, and the pressure limiting device 2 includes a main body 5. On one side of the main body 5, a high-voltage arc striking rod 6 and a low-voltage arc striking rod 7 are arranged. Discharge balls 8 are provided at the ends of the arc rods 7, and the two discharge balls 8 are close to each other. This voltage limiting device cooperates with the three-point grounding technology to effectively prevent the strands from being broken due to discharge, and solves the problems of annual insulation supervision and inspection of substations and detection of resistance of substation grounding grids.

The hoop 9 and the hoop 12 of the pull-out rod include a left hoop 14 and a right hoop 15, and the left and right ends of the hoop 14 and the right hoop 15 are locked by bolts, wherein the hoop of the pull-out rod 9. The front and rear ends are locked with the support rod 16 bayonet pins, and the front and rear ends of the herringbone rod hoop 12 are fixedly connected with the support rod 16. The U-shaped fixture 11 includes a U-shaped fixing seat 17, on which a locking bolt 18 is mounted, and a chuck head 19 is installed at the end of the locking bolt 18. As a result, quick installation can be realized at different positions of the gantry pole, and it can cooperate with the pin insulator to ensure the insulation and reliability of the OPGW residual cable when it is lead down.

Described winding clamp 21 comprises clamp body 22, and the collet of clamp body 22 is on the installation frame 20 by bolt, and the clip tail of clamp body 22 is provided with groove 23, and remaining cable coils in the annular space that each groove 23 forms , and fixed by the bolts up and down the groove 23, the clip body 22 above and below the groove 23 is provided with a plurality of through holes 24 along the length direction, and the bolts pass through the through holes to realize the adjustment of the diameter of the remaining cable coil. By setting a detachable and adjustable winding clamp, the installation of remaining cables is more flexible to meet actual needs, and it is convenient to install and disassemble, providing convenience for maintenance.

Claims (8)

1. A substation single-rod double-cable OPGW remaining cable installation fittings, characterized in that: the gantry pole (1) is provided with a pair of pressure limiting devices (2) and a pair of lead cable devices (3) in sequence from top to bottom And the paired remaining cable reels (4), the paired pressure limiting devices (2), the paired lead cable devices (3) and the paired remaining cable reels (4) together constitute 2 sets of OPGW remaining cable reel fittings, and two OPGW optical cables (25) Pass through the voltage limiting device (2) of each set of OPGW residual cable storage fittings and the insulator of the leading cable device (3) in turn, and wind on the residual cable coil (4). 2. A substation single-rod double-cable OPGW remaining cable installation fitting according to claim 1, characterized in that: the pair of pressure limiting devices (2) are symmetrically installed on the gantry pole (1), and the pressure limiting device (2 ) includes the main body (5), the main body (5) is equipped with a high-voltage arc striking rod (6) and a low-voltage arc striking rod (7) up and down, and the ends of the high-voltage arc striking rod (6) and the low-voltage arc striking rod (7) are both A discharge ball (8) is provided, and the two discharge balls (8) are close to each other. 3. A substation single-rod double-cable OPGW residual cable installation fitting according to claim 1, characterized in that: the lead cable device (3) includes a plurality of pull-out rods installed on the upper part of the gantry pole (1) The hoop (9), the U-shaped clamp (11) installed on the wooden platform (10) and the multiple herringbone hoops (12) installed on the lower part of the gantry pole (1), the hoop of the pulling rod ( 9), U-shaped clamps (11) and herringbone pole hoops (12) are fixed with pin insulators (13). 4. A substation single-rod double-cable OPGW residual cable installation fitting according to claim 3, characterized in that: the hoop of the pulling pole (9) and the hoop of the herringbone pole (12) both include a left hoop (14) and the right hoop (15), the left and right ends of the left hoop (14) and the right hoop (15) are locked by bolts. The bayonet pin is locked, and the front and rear ends of the herringbone bar hoop (12) are fixedly connected with the support bar (16). 5. A substation single-rod double-cable OPGW residual cable installation fitting according to claim 3, characterized in that: the U-shaped fixture (11) includes a U-shaped fixing seat (17), and the U-shaped fixing seat (17 ) is installed with a locking bolt (18), and the end of the locking bolt (18) is installed with a chuck (19). 6. A substation single-rod double-cable OPGW residual cable installation fitting according to claim 1, characterized in that: said paired residual cable reel (4) includes a mounting frame (20), and the mounting frame (20) is symmetrically arranged On both sides of the hoop, a plurality of winding clips (21) are provided in the upper direction of each installation frame (20). 7. A substation single-rod double-cable OPGW residual cable installation fitting according to claim 6, characterized in that: the winding clip (21) is made of insulating and non-magnetic material, and the winding clip (21) includes a clip body (22), the chuck of the clamp body (22) is set on the mounting frame (20), the clamp tail of the clamp body (22) is provided with grooves (23), and the remaining cables are coiled in each groove (23) to form a In the annular space, and fixed by the bolts up and down the groove (23), the clamp body (22) above and below the groove (23) is provided with a plurality of through holes (24) along the length direction, and the bolts pass through the through holes to realize Adjust the diameter of the remaining cable coil. 8. A substation single-rod double-cable OPGW remaining cable installation fitting according to claim 1, characterized in that: the pressure limiting device (2), between the pressure limiting device (2) and the remaining cable reel (4) Grounding wires are provided at three positions of the gantry pole at the lower end of the room and the remaining cable tray (4), and the OPGW optical cable is grounded through parallel trench wires and grounding wires.