CN202678841U - Fast rush repair tower of high-voltage transmission lines - Google Patents

Abstract

A rapid repair tower for high-voltage transmission lines, comprising a tower body (10), three synthetic insulators (30) fixed on the ground by means of steel strand stay wires (20) are connected in series on the left side of the tower, and the wires are suspended below the joints of the synthetic insulators Pulley (40); the right side of the tower body (10) is connected in series with two composite insulators (30) fixed on the ground by means of steel strand stay wires (20), and a wire pulley is suspended below the connection of the two composite insulators , the composite insulators (30) are perpendicular to the direction of the high voltage line; the overhead ground wire pulley (50) is provided near the top of the left side of the tower body (10); the front and rear sides of the tower body (10) are also respectively Steel strand stay wire (20) is provided. The emergency repair tower uses steel strands instead of cross arms, so that the insulators become fixed, which avoids the windage effect caused by the suspension insulators. Flat corner.

Description

High-voltage transmission line rapid repair tower

technical field

The utility model relates to a repair tower capable of quick repair and temporary restoration of power supply under the accident state of a high-voltage overhead transmission line, in particular to a single-column aluminum alloy repair tower suitable for 220kV and below transmission lines and canceling the cross arm.

Background technique

The existing high-voltage line rescue towers are divided into two categories: single-column towers and double-column towers, which are called traditional rescue towers, which include lightning protection wire supports, conductor crossarms, insulators, tower bodies and foundations. Traditional emergency towers use cross-arms, which are cantilever beams, and insulators suspended below the cross-arms will produce windage effects. In the emergency construction, the cross arm should be assembled first, and then the insulators should be installed before the ground wire can be released. Thereby increased workload and difficulty, extended repair time, this one.

Second, the traditional emergency tower has higher requirements on the plane angle of the line, and the plane angle of the line is generally limited to within 5°. But in fact, after the accident of line breakage and tower collapse, the original foundation is used to set up the iron tower and release the ground wire in the original corridor, or re-select the line near the original corridor. In mountainous areas, if emergency towers are to be erected close to the original corridor, taking into account factors such as the limitation of line plane corners, the distance of live lines to the ground, and the force of the tower, towers with greater force are required to meet the construction requirements on site.

Utility model content

The technical problem to be solved by the utility model is to avoid the deficiencies of the above-mentioned prior art, and provide a high-voltage transmission line rapid repair tower. It is directly suspended on the guyed board at the top of the tower, and the other end of the insulator is fixed to the ground through the steel strand guyed wire, that is, the guyed wire is used instead of the cross arm, so that the insulator becomes a fixed type, which avoids the wind caused by the suspended insulator. At the same time, the emergency repair tower of the utility model also allows the high-voltage line to have a plane angle not greater than 30°.

The emergency repair tower of the utility model does not use a cross arm, and can use synthetic insulators of different lengths according to different voltage levels to adjust the angle of the steel strand stay wires to meet the requirements of the electrical distance. At the same time, according to different types of wires, choose corresponding specifications of guy wires, ground anchors, insulators and columns to meet the requirements of mechanical strength.

The technical solution adopted by the utility model to solve the technical problem is:

A high-voltage transmission line rapid repair tower is used for temporary restoration of power supply under the high-voltage transmission line accident state, including a column-type tower body composed of various basic sections, especially:

On the left side of the tower body, there are three composite insulators connected in series along the top of the tower to the ground. The three composite insulators connected in series are fixed obliquely relative to the ground by means of steel strand stay wires. A wire block is suspended below, that is, two wire blocks are suspended below the three composite insulators, and the right side of the tower body is connected in series with two composite insulators along the top of the tower to the ground. The composite insulators of the composite insulators are also obliquely fixed relative to the ground by means of steel strand stay wires, and a wire block is suspended below the connection of the two composite insulators. The composite insulators are perpendicular to the direction of the high voltage line; Equipped with overhead ground wire block;

The front and rear sides of the tower body are respectively provided with steel strand stay wires for balancing the loads on the left and right sides of the tower body.

The emergency repair tower is suitable for transmission lines of 220kV and below. The whole is a single-column aluminum alloy truss structure. The basic section is 6m long and the cross-section is a square of 0.6*0.6m. A square guy plate is installed on the top of the tower body for installing the synthetic insulators on the left and right sides of the tower body, and the steel strand guy wires on the front and rear sides of the tower body. A square guy plate is installed for installing four steel strand guy wires.

The emergency repair tower allows a plane corner of the high-voltage line not greater than 30°.

Fittings are connected between each adjacent two composite insulators, which include two U-shaped rings and a traction plate connected between the two U-shaped rings, and the traction plate suspends the wire block through the pulley ring .

The diameter of the wire pulley is greater than 15 times the cross-sectional diameter of the wire, and at the same time, the diameter of the overhead ground wire pulley is also greater than 15 times the cross-sectional diameter of the overhead ground wire; the wire pulley is made of aluminum alloy, and the ground wire The tackle is a steel tackle.

The curved inclination angles of the top of the tower body and the backguy boards at the waist are 45° and 30° respectively.

The optimal height of the emergency repair tower is 24m, and the height of the wire to the ground is at least 13m.

The composite insulator is used to support and fix the wire position and ensure the insulation strength of the wire. Each composite insulator is composed of two insulators with a length of 2.5m or 3.0m.

Compared with the prior art, the utility model has the beneficial effects of quickly repairing the tower of the high-voltage transmission line as follows:

First of all, the utility model rush repair tower solves the wind deflection problem of the conductor. Since there is no cross-arm, the wire is fixed by two or three synthetic insulators, then, as long as the electrical distance between the live part of the wire and the tower body meets the requirements of safety regulations, that is, the electrical distance of 110 kV is 1.0 meters, 220 The kilovolt electrical distance is 1.9 meters. Of course, there is a certain margin here. Therefore, this tower type is more adaptable than single-column or double-column emergency towers. Due to the reduction of the cross arm, the time of setting up the emergency repair tower of the utility model is less than one-third than that of the single-column emergency tower, and if compared with the double-column emergency tower, it saves time and materials by at least half.

Secondly, the emergency repair tower of the utility model also allows the high-voltage line to have a plane angle not greater than 30°. When the line plane angle is 30°, the angle between the insulator string and the plumb line is actually 15°. In this way, the emergency repair tower can avoid the corridor of the restoration power supply line, and the location of the emergency tower can be selected arbitrarily, as long as the distance between the two emergency towers is less than 300 meters, and the wire specification is less than LGJ-500/35, the requirements can be met.

Description of drawings

Fig. 1 is the schematic diagram of the axonometric projection structure of the utility model high-voltage transmission line quick repair tower;

Fig. 2 is a top view structural schematic diagram of Fig. 1;

Fig. 3 is a partial enlarged view of Fig. 2;

Fig. 4 is the structure schematic diagram that wire block 40, wire 70, traction plate 90, U-shaped ring 100 are interconnected;

Fig. 5 is a structural diagram of the interconnection of the overhead ground wire block 50, the ground wire 80, the traction plate 90, and the U-shaped ring 100.

Detailed ways

Below in conjunction with accompanying drawing, the content of the present utility model is described in further detail.

Referring to Figures 1 to 5, a high-voltage transmission line rapid repair tower is used for temporary restoration of power supply under the high-voltage transmission line accident state, including a column-type tower body 10 composed of various basic sections, the tower body 10 On the left side, there are three composite insulators 30 connected in series along the top of the tower to the ground. The three composite insulators 30 connected in series are fixed obliquely relative to the ground by means of steel strand stay wires 20, and a wire is suspended below the joint of each adjacent composite insulator. Pulley 40, that is, two wire pulleys 40 are suspended below the three composite insulators. The right side of the tower body 10 is connected in series with two composite insulators 30 along its tower top to the ground, and these two are connected in series. The composite insulators 30 of the composite insulators 30 are also obliquely fixed relative to the ground by means of the steel strand stay wires 20, and a wire block is also suspended below the connection of the two composite insulators, and the composite insulators 30 are perpendicular to the high voltage line direction; An overhead ground wire trolley 50 is arranged near the top; the wire 70 is erected on the wire trolley 40 , and the ground wire 80 is erected on the ground wire trolley 50 .

The front and rear sides of the tower body 10 are respectively provided with steel strand stay wires 20 for balancing the loads on the left and right sides of the tower body 10 .

The emergency repair tower is suitable for transmission lines of 220kV and below. The whole is a single-column aluminum alloy truss structure. The basic section is 6m long and the cross-section is a square of 0.6*0.6m. A square guy plate 60 is installed on the top of the tower body 10 for installing the composite insulators 30 on the left and right sides of the tower body 10, and the steel strand guy wires 20 on the front and rear sides of the tower body 10, A square guy plate 60 is also installed at the waist of the tower body 10 for installing four steel strand guy wires 20 .

The emergency repair tower allows a high-voltage line plane angle of not more than 30°, which reduces the stringent requirements of the straight line emergency tower on the line angle. The traditional straight line emergency tower requires the line angle not to exceed 5°. The distance between the towers is within the required range, and the line angle is not more than 30°, so the emergency tower has strong adaptability.

Fittings are connected between each adjacent two composite insulators 30, which include two U-shaped rings 100 and a traction plate 90 connected between the two U-shaped rings 100, and the traction plate 90 passes through the pulley ring The wire tackle 40 is suspended.

The diameter of the wire block 40 is greater than 15 times the cross-sectional diameter of the wire, and at the same time, the diameter of the overhead ground wire block 50 is also greater than 15 times the cross-sectional diameter of the overhead ground wire; the wire block 40 is made of aluminum alloy, and the The ground wire block 50 is a steel block.

The fire curve inclination angles of the top of the tower body and the waist guy board 60 are 45° and 30° respectively, that is to say, a guy board is respectively installed on the top of the tower body and the waist, and the fire curve inclination angle of the top guy board is 45°. , the inclination angle of the guy wire on the waist guy board is 30° to meet the guy wire inclination angle of the guy wire and the insulator string, the composite insulators and guy wires are installed on the guy board on the top of the tower, and the bottom of the emergency tower is inserted into the tower leg , the tower leg is welded by a 0.5 m steel bottom plate and a cross-shaped support plate, wherein there is a notch in the middle of the support plate for inserting the tower body and a screw hole for the bolt to pass through, and the tower leg and the emergency tower are fixed by bolts. The steel plate of the notch is composed of three steel plates. Among them, the steel plate in the middle is lower than the steel plates on both sides to facilitate the insertion of the tower body. If the foundation of the emergency repair tower is soft, it can be considered to use sleepers to expand the area of the foundation floor to reduce its foundation stress.

The optimal height of the tower body for emergency repair is 24m in four sections. Except that the composite insulator has a geometric vertical distance to the ground, the actual height of the wire to the ground is at least 13m. The height refers to the relative height of the cross arm located at the bottom of the emergency tower to the ground. For 110kV and 220KV lines, the height of the existing emergency tower is generally more than 9 meters.

Described composite insulator 30 is used for supporting and fixing wire position and guarantees the insulation strength of wire, and each composite insulator 30 is made up of two long 2.5m or 3.0m insulators.

The tower body of this emergency repair tower is made of aluminum alloy, and its weight can be reduced by nearly one-third compared with the steel tower body. The tower body is mainly composed of a lower section, several middle sections and an upper section. The lower section is tapered toward the ground, and the cross-section length and width of the skyward section are 600 mm. The width of the middle and upper sections of the tower body is 600mm, and each section has a different height of 24m, 30m or 36m. Because the tower is stable, it must be supported by guy wires. So there must be four temporary guy wires fixed from the top of the tower. At the same time, the middle part of the tower needs to add four more temporary stay wires to fix it.

Referring to Fig. 1, A, B, C, and D are cable reels or temporary ground anchors, which are mainly used to fix the tower body so that it does not shift and avoid losing balance by grabbing the tower body.

In order to avoid the short-circuit discharge caused by the three wires being too close to the tower body, the key is that the two wires close to the tower body must meet the distance from the tower body of 110kV above 1.0 meters and 220kV above 2.1 meters. Because the top of the tower is an overhead ground wire, it can be directly grounded.

The balance of the emergency tower body must be solved by guy wires, so the fixing of the composite insulators on the left and right sides is also solved by guy wires. The front and rear side pull wires are purely fixed because they follow the direction of the line.

The length of the composite insulator can be processed at will. Through the adjustment of the processing length of the composite insulator and the adjustment of the ground cable, the distance between the live wire and the tower body can be satisfied to reach the safe distance of each level of voltage to the tower body. Temporary guy wires can be combined, that is, the upper and lower pull wires share a guy wire drum, or they can be fixed to the ground with their respective guy wire drums.

Composite insulators are fixed to the ground by line fittings. The three-phase conductors of overhead transmission lines must meet the minimum distance between live conductors and the grounding part of the tower body. Composite insulators have the characteristics of light weight, convenient processing and excellent insulation performance. It can be seen from Figure 2 If there are two-phase wires on the left side of the emergency tower, then there should be three sets of composite insulators, and there are only one phase wires on the right side of the emergency tower, so there are only two sets of composite insulators, so as to ensure that the insulation performance of the wires, the emergency tower, and the pull wires is maintained. The overhead ground wire is directly grounded to the emergency tower body through line fittings.

The direction of the insulator and the direction of the high voltage line are perpendicular to each other, which is one of the conditions that the line must meet. On the other hand, the three-phase conductor and the overhead ground wire should be installed on both sides of the line direction of the emergency repair tower.

The guy wires used for tower body balance are fixed to the ground guy wires with guy wire fittings UT-shaped clamps and steel strands. Similarly, there is a hanging hole at the end of the synthetic insulator, which can also be fixed with UT-shaped wire clamps and steel strands to the ground guy wires.

The charged wire is fixed by the metal fittings and the aluminum pulley between the two composite insulators. Since the composite insulator and the ground are fixed by steel strands, the insulator string avoids the large size of the tower due to wind deflection in the prior art. Complicated shortcomings.

The so-called inclination angle of the fire curve is to bend the cable board downward by 45° or 30°, because the angle between the cable of the insulator or the top of the tower along the side of the line is 45° to the ground, and the angle of the cable at the waist to the ground is about 30° , considering the angle between the guy wire and the ground, the inclination angle of the guy board should meet the actual situation as much as possible. The inclination angles of the top guy board and the waist guy board are 45 degrees and 30 degrees respectively.

According to calculations, the above-mentioned embodiment of the emergency repair tower is applicable to the wire specification of LGJ-500/35, and the unit weight is 1642kg/km; 41.11kg/km, with a cross-sectional area of 48.32mm2, or an OPGW optical fiber cable that matches its weight. When the tower height is 36m in six sections, the use condition of the tower is determined to be that the span under vertical load is not more than 500m, and the horizontal wind load The distance is 330m. If the construction is in winter, the protection angle of the overhead ground wire may not be considered. If the construction is in summer, the protection angle of the overhead ground wire may be considered to be about 30°, because the probability of thunderstorms in winter construction is very small, and the lightning strike line should be considered in summer construction. Possibility, so the protection angle of the overhead ground wire should be considered. If necessary, a short cross arm should be added to the top of the emergency tower to increase the protection angle of the overhead ground wire. In order to prevent the emergency tower from being struck by lightning, a complete grounding system can also be laid .

The tower body is composed of aluminum alloy sections, each section is 6m, and each section is connected by a flange. The flange is welded by four pieces of angle steel, and the angle steel is also welded with ribs to strengthen the structure. For support, connecting holes for connecting bolts are drilled between ribs, and M16 bolts are used for connecting flanges.

Composite insulators are used to support and fix the position of the wire in the tower and ensure that the wire has a considerable insulation strength. For the convenience of transportation and storage, its length is about 2.5m and 3.0m. Considering its electrical distance, two composite insulators can be combined into a string of composite insulators with a slant distance of 5m to 6m, so as to ensure that the vertical distance of the conductor and the horizontal geometric projection distance meet the requirements of the distance between lines and the vertical distance. Composite insulator is an insulator developed in the past ten years. It replaces the porcelain and glass insulators commonly used in power transmission lines. It is characterized by good insulation performance and light weight, and its insulation can be determined according to the voltage level of the transmission line. Length, for example, the length of low-voltage insulators can choose shorter composite insulators, and the length of high-voltage insulators can choose longer composite insulators.

The part of the temporary steel strand stay wire buried in the ground may be soil or rock. To save time, if it is the soil part, the part of the stay wire buried in the soil can be quickly dug into a pit with a length of 1m, a width of 0.4m, and a height of 2m, and then bury it in a combination with a wire rod. Type cable reel, if the part of the cable that enters the soil is rock, you can pour a concrete ground anchor with a cable rod with a diameter of 0.2m at the top, a diameter of 0.4m at the bottom, and a depth of 0.5.

The left side of the emergency repair tower of the utility model carries an overhead ground wire, the vertical load of two wires, and the right side carries the vertical load of a wire. Due to the different vertical loads on both sides, the stability of the tower depends entirely on the upper and middle stay wires on the entire tower body. As can be seen from Figure 1, the tower allows a certain line plane angle.

The biggest feature of this tower is that it replaces the existing general-purpose emergency tower with cross arms, and the composite insulator is obliquely pulled to the ground with the help of guy wires. As can be seen from Figure 1, the guy wire fixing points are A, B, C, and D respectively. The utility model rush repair tower solves the problem of the distance between the charged part of the wire and the tower body, one is to control the tightness of the temporary stay wire on the ground, and the other is to increase the length of the composite insulator. When the angle between the guy line and the ground is 45°, the angle between the composite insulator and the tower body can be considered to be 30°, thus laying the foundation for the adjustment of the composite insulator.

Claims (8)

1. a high voltage transmission line pipeline quick-speed first-aid repair tower is used for temporarily restoring electricity under the ultra-high-tension power transmission line accident condition, comprises the pillar body of the tower (10) that is comprised of each basic segment, it is characterized in that:

The left side of described body of the tower (10) is serially connected with three synthetic insulators (30) earthward successively along its cat head, these three synthetic insulators that are serially connected (30) by steel strand backguy (20) relatively face tilt fix, the below of every adjacent synthetic insulator junction hangs a wire coaster (40), namely, the below of three synthetic insulators hangs two wire coasters (40) altogether, the right side of described body of the tower (10) is serially connected with two synthetic insulators (30) earthward successively along its cat head, these two synthetic insulators that are serially connected (30) equally by steel strand backguy (20) relatively face tilt fix, wire coaster of the same suspension in the below of these two synthetic insulator junctions, described each synthetic insulator (30) is perpendicular with high pressure fair line road direction; Place, nearly top, described body of the tower (10) left side is provided with overhead ground wire coaster (50);

The both sides, front and back of described body of the tower (10) are respectively equipped with the steel strand backguy (20) for the described body of the tower of balance (10) left and right sides load.

2. high voltage transmission line pipeline quick-speed first-aid repair tower according to claim 1, it is characterized in that: this emergent repairing tower is applicable to 220kV and following transmission line, integral body is single-column aluminium alloy truss formula structure, described basic segment length 6m, cross section is the square of 0.6*0.6m, each basic segment is passed through bolted on connection by ring flange, described body of the tower (10) top is equipped with a tetragonal strain plate (60), be used for installing the described synthetic insulator (30) of described body of the tower (10) left and right sides, and the described steel of both sides twists backguy (20) before and after the described body of the tower (10), described body of the tower (10) waist also is equipped with a tetragonal strain plate (60), is used for installing the backguy (20) of four steel strands.

3. high voltage transmission line pipeline quick-speed first-aid repair tower according to claim 1, it is characterized in that: this emergent repairing tower allows to be not more than 30 ° high-tension line plane corner, and the insulator string inclination angle is high-tension line plane corner half.

4. high voltage transmission line pipeline quick-speed first-aid repair tower according to claim 1, it is characterized in that: be connected with gold utensil between described every adjacent two synthetic insulators (30), it comprises two U-shaped rings (100) and is connected to towing plate (90) between these two U-shaped rings (100) that described towing plate (90) hangs described wire coaster (40) by the coaster suspension ring.

5. high voltage transmission line pipeline quick-speed first-aid repair tower according to claim 1, it is characterized in that: the diameter of described wire coaster (40) is greater than 15 times of the conductor cross-section diameter, simultaneously, the diameter of described overhead ground wire coaster (50) is also greater than 15 times of overhead ground wire diameter of section; Described wire coaster (40) adopts aluminium alloy to make, and described ground wire coaster (50) is the steel coaster.

6. high voltage transmission line pipeline quick-speed first-aid repair tower according to claim 2, it is characterized in that: the fiery bent inclination angle of described body of the tower top and waist strain plate (60) is respectively 45 ° and 30 °.

7. high voltage transmission line pipeline quick-speed first-aid repair tower according to claim 2 is characterized in that, this emergent repairing tower height is 24m, and wire reaches 13m at least to ground level.

8. high voltage transmission line pipeline quick-speed first-aid repair tower according to claim 1, it is characterized in that: described synthetic insulator (30) is used for support and fixing cord position and guarantees the dielectric strength of wire, and each synthetic insulator (30) is comprised of the insulator of two long 2.5m or 3.0m.

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