CN202094569U - Electrical tension tower using rigid jumper wires and stabilizing device for connecting jumper wire thereof - Google Patents

Abstract

The utility model relates to an electric tension tower using an aluminum tube type rigid jumper. Since the middle section of the jumper string will sag when connected and it is difficult to accurately estimate the sag, it is difficult to ensure that the lengths of the split jumpers are coordinated with each other during installation. This brings great inconvenience to construction. The utility model provides an electric power tension tower using aluminum tube type rigid jumpers, which is characterized in that it comprises: a cross arm, a plurality of split jumpers are erected at both ends of the cross arm respectively, and are erected on the The multiple split jumpers at both ends of the cross arm are connected by rigid jumpers, and the multiple split jumpers and the rigid jumper electrically connect the two sides of the power strain tower together. Through the above technical scheme, it can be conveniently installed. It solves the problem that the split sub-jumpers of the flexible squirrel-cage jumper are difficult to coordinate and install, and is beneficial to control the safety distance of crossing lines. It is also possible to reduce the number of support spacers used in the middle of the patch cords.

Description

Stabilization of electrical strain towers using rigid jumpers and connecting jumpers therein

technical field

The utility model relates to a rigid jumper used in electric tension towers. the

Background technique

On the 1000kV Jindongnan-Nanyang-Jingmen jumper line that has been built at present, a large number of squirrel-cage or ladder-type (tie-rod) jumper strings are used. As shown schematically in FIG. 1 , the squirrel-cage jumper string includes a plurality of split jumper wires 111 (typically 8, 4 of which are shown in the side view of FIG. 1 for reasons of perspective) , these jumpers are spaced from each other by a plurality of spacer bars 112 to form a cage shape, which is called a squirrel-cage jumper string. The squirrel-cage jumper string is obliquely hung on the jumper wires outside the tension string 114 through the pull rod 113 to form a support. The squirrel-cage jumper string is used to electrically connect the two sides of the power tension tower. the

However, as shown in the figure, since the middle section of the jumper string sags when connected, it is difficult to accurately estimate the sag. In addition, since each jumper 111 is flexible and has different sags, it is difficult to ensure that the lengths of the split jumpers 111 are consistent with each other during installation. This brings great inconvenience to construction. After the installation is completed, the tower looks unattractive. And ladder-type (pull-rod type) jumper string is directly on the jumper outside the tension clamp 114 due to the stress point, and the whole jumper string is very heavy, which makes the jumper of the tension string outlet subject to a larger concentration. The load affects the setting-out installation of the entire tension section (it is also impossible to accurately calculate the sag of the setting-out line), which brings certain safety hazards to the line. the

Utility model content

As mentioned above, a new type of jumper is needed to solve the above problems. the

According to one aspect of the present invention, there is provided a power tension tower using aluminum tube rigid jumper, which is characterized in that it includes: a cross arm, and a plurality of split jumper wires are erected at both ends of the cross arm , the multiple split jumpers erected at both ends of the cross arm are connected by rigid jumpers, and the multiple split jumpers and the rigid jumpers electrically connect the two sides of the power strain tower together. the

According to an aspect of the utility model, the rigid jumper is an aluminum tube type rigid jumper. the

According to an aspect of the present invention, the rigid jumper is composed of multiple rigid sub-jumpers connected to each other. the

According to an aspect of the present invention, a pressure equalizing ring is provided at the position where the plurality of split jumpers and the rigid jumper are connected to each other. the

According to an aspect of the present invention, the outer circumference of the rigid jumper has slots, and the plurality of split jumper wires are respectively connected to the slots on the outer circumference of the rigid jumper. the

According to one aspect of the present utility model, the number of the rigid sub-jumpers is 2-4. the

According to one aspect of the present invention, the rigid sub-jumpers are interlaced with each other, and joints are provided at the interlaced places to ensure a firm connection between the rigid sub-jumpers. the

According to another aspect of the present utility model, there is provided a stabilizing device for connecting jumpers used in electric tension towers, which is characterized in that it includes: a string of jumper insulators, one end of which is hung on the crossbar of the electric tension tower On the shoulder, the other end has a wire grab that grabs the sagging connection jumper. the

According to an aspect of the present invention, the jumper insulator strings are perpendicular to the horizontal direction. the

According to one aspect of the present utility model, the string of jumper insulators forms an angle of 0-15° with the vertical direction. the

According to an aspect of the present invention, the connection jumper is a squirrel-cage splitter jumper. the

According to an aspect of the present invention, the connection jumper is a rigid jumper. the

According to an aspect of the present invention, one end of the wire jumper insulator string is hung on the end of the wire jumper cross arm on one side close to the power strain tower. the

As mentioned above, the inventor of the present utility model creatively proposes an aluminum tube type rigid jumper. Combined with previous engineering experience, the aluminum tube rigid jumper can solve the shortcomings of the above two string types. The appearance of this aluminum tube rigid jumper is more beautiful than the squirrel cage jumper string, and the construction and installation are convenient; at the same time, it does not affect the sag characteristics of the entire tensile section, which is beneficial to control the safety distance of the line crossing and reduce the jump caused by the weight of the string. Wire (fitting) damage. At the same time, it meets the requirements of 1000kV UHV line electrical clearance and electromagnetic environment requirements. Ensure better operation of 1000kV jumper lines. the

Description of drawings

The present invention will be described below with reference to the accompanying drawings, however, it should be understood that the accompanying drawings are only schematic, and each component in the drawings is not necessarily drawn to scale. In the drawings the same reference numerals denote the same parts, wherein:

Fig. 1 schematically shows a schematic diagram of a squirrel cage type wire jumper string and a ladder type (pull rod type) wire jumper string according to the prior art;

2A-2C schematically show a schematic diagram of an aluminum tube type rigid jumper according to an embodiment of the present invention; and

Fig. 3 schematically shows a stabilizing device for connection jumpers used in electric tension towers according to another embodiment of the present invention. the

Detailed ways

A preferred embodiment of the present invention will be described here, please refer to the accompanying drawings. In the drawings attached to the present utility model, the same reference numerals represent the same structural elements. the

As shown in Figures 2A-2C, reference numeral 212 represents a pressure equalizing ring, reference numeral 213 represents a spacer bar, reference numeral 214 represents a rigid jumper, reference numerals 2141 and 2142 represent sub jumpers, and reference numeral 215 represents Joints, reference numeral 216, represent spacer support rods. For the sake of brevity, only the structures and connections of the components that are closely related to the present invention are described, while other components are briefly described or omitted. the

In the embodiment shown in FIG. 2A, a rigid jumper 214 is used instead of a squirrel-cage jumper. As shown in FIG. 2A, basically the same split jumper is used on both sides of the cross arm, and a plurality of split jumpers erected at both ends of the cross arm are connected by a rigid jumper 214 between them. . The split jumper can be connected to the rigid jumper 214 in a variety of ways. For example, the outer perimeter of the rigid jumper 214 may be evenly slotted, and each of the split jumper wires may be crimped or welded to the slot on the outer perimeter of the rigid jumper. In another embodiment, soldering can be used to connect the split jumper to the rigid jumper. In yet another embodiment, four studs are welded in the outer direction of each rigid jumper end, and the four studs are used to connect 4 split sub-jumpers respectively, and two aluminum tubes are connected to 8 sub-jumpers in total, and the stud ends are Hollow cylinder, each jumper can be crimped and fixed by special equipment (such as a crimping machine). the

In one embodiment, since there is an end connection between the rigid jumper and the split jumper, the voltage at the connection may change, so a voltage equalizing ring 212 is used at the connection to connect the rigid jumper and the split jumper , so that the voltage between the two is basically the same. For 1000kV class UHV applications, the equalizing ring is important. the

Figure 2B shows a partially enlarged view of the rigid jumper. Fig. 2C shows an enlarged view viewed from direction B of Fig. 2B. 2B and 2C schematically illustrate connections between rigid jumpers and split jumpers. In FIG. 2C, spacer bars 213 are used to support the split jumpers and assist in interconnecting the split jumpers to the rigid jumpers. In one embodiment, two rigid jumper wires 214 are used. As shown in FIG. 2B , spacer support rods 216 are used between the two rigid jumpers to space them at a predetermined distance to ensure electrical transmission. Due to the length of the jumper wires it can be quite long. If a single rigid jumper is used to span the entire power strain tower, it may cause the rigid jumper to sag due to its own weight, resulting in changes in electrical transmission performance. Therefore, preferably, each rigid jumper can be composed of multiple segmented sub-jumpers. For example, as shown in FIG. 2B , rigid jumper 214 is composed of sub-jumpers 2141 and 2142 . The sub-jumpers 2141 and 2142 are interlaced with each other, and a plurality of connectors/clamps 215 are used to ensure a firm connection between the sub-jumpers. Those skilled in the art can adopt various other appropriate ways to ensure the firm connection between the sub-jumpers of each segment. In addition, according to the size of the power tension tower and the requirements of power transmission, other numbers of sub-jumpers can be used. For example, a rigid jumper is composed of 2-4 sub-jumpers. the

The length of each sub-jumper here is not limited. For example, in one embodiment, two sub-jumpers (for example, the length of the sub-jumper 2141 is 7 meters, and the length of the other sub-jumper 2142 is 9 meters) can be used to connect. In another embodiment, two 9-meter jumper wires can be used for butt connection. the

In one embodiment, aluminum tube style rigid jumpers may be used. It should be understood that other rigid jumpers of various materials and shapes may be used. Since overhangs are required here, the use of lightweight metal or its alloys is preferred. In one embodiment, a lightweight metal alloy with good electrical conductivity can also be used as the material of the rigid jumper, for example, magnesium alloy. In addition, the cross-sectional shape of the rigid jumper is not necessarily a hollow tube, but can adopt other forms. the

Easy installation thanks to rigid jumper wires. Various types of rigid jumpers can be conveniently designed in advance for power tension towers of various sizes, which solves the problem that the split jumpers of flexible squirrel-cage jumpers are difficult to coordinate and install. In addition, the use of rigid jumpers has little effect on the sag characteristics of the entire tension section, which is beneficial to control the safety distance of crossing lines. Finally, using the rigid jumper of the present invention can reduce the number of supporting spacers used in the middle of the jumper, thereby reducing the cost. the

Describe the second embodiment of the present utility model below. the

As is known to those skilled in the art, when transmitting power, the voltage carried on the jumper can be very high, and the rigid jumper (rigid aluminum tube) or flexible jumper (squirrel cage split jumper) used to transmit power string) may be long in length and may have a very large mass in itself. After installation, the above-mentioned rigid jumper or flexible jumper will sag due to its own weight. Such sag needs to be considered in engineering. This is because, for example, there will be multiple cross-arms on different heights of the power strain tower, if the sag is too large, it may cause the cross-over of the jumpers erected on the cross-arms of different heights, which poses a threat to the safety belt. Here comes a great danger. the

Referring back to accompanying drawings 1 and 2A, it can be seen that in the above drawings, a pull rod 113 is used to stabilize the jumper. Taking accompanying drawing 2A as an example, the pull rod 113 is connected to the rigid jumper of the sag (flexible jumper in FIG. 1 ) from the jumper outside the strain clamp 114, so as to apply tension to the jumper of the sag, Control and ensure that the jumper does not sag excessively. the

However, although the pull rod 113 is used to apply tension, the jumper used for power transmission may have a very large mass, which makes the jumper at the outlet of the tension string subjected to a large concentrated load. When the tie rod 113 is hung on the jumper at the outlet of the tension string, under the influence of severe weather such as strong winds, the sag of the transmission line may still change greatly, which may cause adjacent jumpers to contact each other Or cross over, and then affect the stability and safety of power transmission. For this reason, it is necessary to improve the stabilizing measures of the jumper. the

As analyzed above, the tie rods in the prior art are hung on jumpers outside the tension clamps. The jumper itself is flexible, therefore, the deformation of the jumper outside the strain clamp when it is subjected to an external force will bring great difficulties to accurately calculate the sag of the wire. In this regard, the inventor has proposed a technical solution as shown in Figure 3 . As shown in the figure, according to the utility model, the jumper insulator string 311 is used to hang on the jumper cross arm 313 of the strain tower, and the rigid jumper cross arm 313 bears the pulling force on the jumper. In one embodiment, the jumper wire insulator string 311 is hung on the end of the jumper wire cross arm near the side of the tower. Since the jumper cross-arm 313 is rigid, it is easier to calculate the jumper's weight when the jumper is suspended from the jumper cross-arm 313 than when the jumper is hung on a flexible jumper outside the tension string. Sag. the

It should be noted that the second embodiment of the present invention can be applied to flexible squirrel-cage split jumpers, and can also be applied to rigid aluminum tube jumpers. the

More specifically, please refer to FIG. 3 , the jumper insulator string 311 has a wire grab 312 that can "catch" flexible multiple split jumper wires, or can "catch" a rigid aluminum tube. The jumper insulator string 311 has a structure well known to those skilled in the art. In addition, after reading the teachings herein, those skilled in the art can easily think of other alternative devices for replacing the jumper insulator string 311 here. For example, a combination of rigid tie rods and means for securing jumpers and crossarms, respectively, may be used. the

On the other hand, as shown in FIG. 3 , in one embodiment, the jumper insulator string 311 has an acute angle θ with the vertical direction. It can be understood that when the jumper insulator string 311 has an acute angle θ with the vertical direction, this is because, if a jumper insulator string in the vertical direction is used, for a very long jumper, the distance between the two pulling points The distance is relatively close. This will cause a long part of the jumper on both sides that is not connected, which may cause the jumper part between the two pull points to bulge, and the jumper part on both sides of the two pull points to sag, and the entire jumper The line part forms the arch. If a certain angle is adopted from the vertical direction, the two pull contacts can be separated from each other by a greater distance, so that the force on the entire jumper is more uniform and the degree of vertical change is smaller. In one embodiment, the included angle θ may range from 0° to 15°. In other words, in one embodiment of the present invention, the jumper insulator string 311 can be vertical in the horizontal direction. the

Although the invention has been described with reference to specific embodiments, it should be understood that the embodiments are exemplary and that the scope of the invention is not limited to these embodiments. Various variations, modifications, additions and improvements to the above-described embodiments are possible. It is intended that such variations, modifications, additions and improvements fall within the scope of the present invention as specifically described in the following claims. the

Claims (13)

1. A power strain tower using a rigid jumper, characterized in that it comprises: cross arm, A plurality of split jumpers are installed at both ends of the cross arm respectively, The multiple split jumpers erected at both ends of the cross arm are connected by rigid jumpers, and the multiple split jumpers and the rigid jumpers electrically connect the two sides of the power strain tower together. 2. The electric tension tower according to claim 1, characterized in that, the rigid jumper is an aluminum tube type rigid jumper. 3. The electric tension tower according to claim 1 or 2, characterized in that, the rigid jumper is composed of multiple rigid sub-jumpers connected to each other. 4. The electric power strain tower according to claim 3, characterized in that, the number of said rigid jumpers is 2-4. 5. The power strain tower according to claim 1, characterized in that, the outer circumference of the rigid jumper has slots, and the plurality of split jumpers are respectively connected to the openings on the outer circumference of the rigid jumper. in the slot. 6. The power strain tower according to claim 1 or 2, characterized in that a voltage equalizing ring is provided at the position where the plurality of split jumpers and the rigid jumper are connected to each other. 7. The electric tension tower according to claim 3, characterized in that, the rigid sub-jumpers are interlaced with each other, and joints are provided at the intersections to ensure the firm connection between the rigid sub-jumpers. 8. A stabilizing device for connecting jumpers used in electric tension towers, characterized in that it comprises: One end of the jumper insulator string is hung on the jumper cross arm of the power tension tower, and the other end has a wire grab, and the wire grab catches the sag connecting jumper. 9. The stabilizing device according to claim 8, characterized in that the string of jumper insulators is perpendicular to the horizontal direction. 10. The stabilizing device according to claim 8, characterized in that the string of jumper insulators forms an angle of 0-15° with the vertical direction. 11. The stabilizing device according to claim 8, characterized in that the connection jumper is a squirrel-cage splitter jumper. 12. The stabilizing device of claim 8, wherein said connection jumper is a rigid jumper. 13. The stabilizing device according to claim 8, characterized in that, one end of the jumper insulator string is hung on the end of the jumper cross-arm near the power tension tower.

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