CN115912227A - Breakable tangent tower and construction method thereof - Google Patents

Abstract

The invention relates to a breakable tangent tower and a construction method thereof, wherein the tangent tower comprises a tower body, an insulator string and a lead, wherein one end of the insulator string is arranged on the tower top of the tower body; the wire is connected with one end of the insulator string far away from the tower body, so that the position of the wire in the gravity direction is higher than that of the tower top. The insulator string is arranged on the tower top of the tower body, extends along the direction far away from the tower top in the gravity direction and is connected with the conducting wire. The wires are supported by the insulator strings and form a gap in the gravity direction with the tower top. The structural reasonability and the reliability of the whole tangent tower are guaranteed. Meanwhile, under the working condition of strong wind, the insulator string can provide support for guiding, and the conductor is prevented from shaking. The wire can guarantee that the insulator string cannot collapse towards the top of the tower. Therefore, the insulator string and the conducting wire can be mutually supported under the condition of wind blowing, and the safety and the reliability of the tangent tower are further improved.

Description

Breakable tangent tower and construction method thereof

Technical Field

The invention relates to the technical field of power equipment, in particular to a breakable tangent tower and a construction method thereof.

Background

Generally, the span of a transmission line with a voltage class of 500kV or more is 400 to 500m, but due to the topographic conditions, the individual span is extremely large, even exceeding 1000m. For the situation, the span is extremely large, the sag of the wire is also extremely large, and the load of the tower is also extremely large. On one hand, the tower load is large, and the safety and reliability of the line body are reduced; on the other hand, under the working condition of strong wind, the windage yaw easily causes the insufficient electrical distance between the leads or the windage yaw of the leads to the obstacles in the passage, thereby bringing about potential safety hazards. In this case, the tension tower is generally used for breaking, but the weight of the tension tower is large, and the cost of the tension insulator string is high, so that the breaking cost is high. The existing tangent tower has high requirements on construction environment, and the construction requirements can be met only by designing the height of the tangent tower to be very high, so that the construction difficulty and the construction cost are further improved.

Disclosure of Invention

Therefore, it is necessary to provide a breakable tangent tower and a construction method thereof, which solve the problems of the tangent tower that the construction environment is high and the construction cost is high.

A breakable tangent tower comprises a tower body, an insulator string and a lead, wherein one end of the insulator string is arranged on the top of the tower body; the wire is connected with one end, far away from the tower body, of the insulator string, so that the position of the wire in the gravity direction is higher than that of the tower top.

In one embodiment, the number of the insulator strings is at least two, and the other ends of at least two insulator strings are respectively connected to the wires and are respectively arranged on two sides of the length direction of the wires.

In one embodiment, the number of the insulator strings is two, two insulator strings are connected to one end of the tower top and are arranged at intervals, and the other ends, far away from the tower body, of the two insulator strings are in contact with each other.

In one embodiment, two insulator strings and the tower top enclose a triangle, and the triangle is a regular triangle.

In one embodiment, the insulator string includes an insulator and a connecting portion, the insulator is provided with a through hole, the connecting portion is arranged in the through hole in a penetrating manner, and two end portions of the connecting portion are respectively connected with the tower top and the lead.

In one embodiment, the number of the insulators is at least two, and at least two insulators are arranged on the connecting portion in a penetrating mode.

In one embodiment, the insulator is a flexible insulator, and the flexible insulator can elastically deform under stress.

In one embodiment, the number of the conducting wires is at least two, each conducting wire is connected to the tower top through at least two insulator strings, the at least two conducting wires are respectively located on two sides of the tower body, and the two adjacent conducting wires are arranged at intervals.

In one embodiment, the number of the tower bodies is at least two, the number of the insulator strings is set corresponding to the number of the tower bodies, and the wires can be connected with the insulator strings on different tower bodies.

According to the breakable tangent tower and the construction method thereof, one end of the insulator string is arranged on the tower top of the tower body, the insulator string extends in the gravity direction along the direction far away from the tower top, and the other end far away from the tower top is connected with the conducting wire. The wires are supported by the insulator strings and form a gap in the gravity direction with the tower top. The structural reasonability and the reliability of the whole tangent tower are guaranteed. Meanwhile, under the working condition of strong wind, the insulator string can provide support for guiding, and the conductor is prevented from shaking. The wire can guarantee that the insulator string cannot collapse towards the top of the tower. Therefore, the insulator string and the conducting wire can be mutually supported under the condition of wind blowing, and the safety and the reliability of the tangent tower are further improved. Simultaneously, the support reliability to the wire between different tower bodies can be guaranteed to two at least tower bodies and insulator chain. The wires are also enabled to provide support for the insulator string. And then, the reliability and the practicability of the power transmission network are ensured.

A method of constructing a breakable tangent tower, the method comprising the steps of:

acquiring the sag height of the sag under the condition that the lead is loosened after erection;

obtaining the planned height of the tower body according to the requirements of the sag height and the electrical distance of the lead;

building part of the tower body; part of the tower body is lower than the planned height;

setting a ground wire for paying off; one end of the ground wire is connected with the tower body, and the other end of the ground wire is grounded;

building a further part of said tower on the basis of a part of said tower such that said tower height reaches said planned height;

tightening the ground wire;

and an insulator string is arranged on the tower top, and one end of the insulator string, which is far away from the tower body, is connected with the lead.

Since the wires are located above the tower top of the tower body, it is not possible to build all parts of the tower body at once. The wires have a certain amount of sagging after erection. Therefore, before the assembly, the lowest point height of the conductor in the loosening condition after erection, namely the sag height of the sag, is obtained. And combining the safe electrical distance according to the construction safety requirement to obtain the planned height of the finished tower body. Then, the tower body is partially constructed, and the partial tower body is lower than the planned height, so that the safety of the subsequent construction of the tower body can be ensured. And the ground wire is further connected to part of the tower body and is paid off, so that the construction safety is further ensured. And finishing the rest part of the tower body after the ground wire defense is finished. The tower body is brought to the planned height. And finally, tightening the ground wire to finish construction.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a linear tower in one embodiment;

fig. 2 is a schematic structural diagram of another view angle of the linear tower in the embodiment of fig. 1.

The elements in the figure are labeled as follows:

10. the tangent tower can be opened; 100. a tower body; 110. the tower top; 200. an insulator string; 300. and (4) conducting wires.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 and 2, the power transmission network in one embodiment includes a breakable tangent tower 10. The breakable tangent tower 10 comprises a tower body 100, an insulator string 200 and a conducting wire 300, wherein one end of the insulator string 200 is arranged on the tower top 110 of the tower body 100; the lead 300 is connected to one end of the insulator string 200 away from the tower body 100, so that the position of the lead 300 in the gravity direction is higher than that of the tower top 110.

One end of the insulator string 200 is disposed on the tower top 110 of the tower body 100, the insulator string 200 extends in a direction away from the tower top 110 in the gravity direction, and the other end away from the tower top is connected to the lead 300. The wires 300 are supported by the insulator string 200 and are spaced apart from the tower top 110 in the direction of gravity. The structural reasonability and reliability of the whole linear tower 10 are guaranteed. Meanwhile, under the working condition of strong wind, the insulator string 200 can provide support for guiding, and the conductor 300 is prevented from shaking. The conductor 300 ensures that the insulator string 200 does not collapse towards the top of the tower 110. Therefore, the insulator string 200 and the wires 300 can support each other under the condition of wind blowing, and the safety and reliability of the tangent tower 10 are further improved.

Under high wind conditions, the wire 300 is prone to shifting under the influence of wind. And the windage yaw of the wires 300 easily causes the electrical distance between the wires 300 to be insufficient or the windage yaw distance of the wires 300 to obstacles around the power transmission channel to be insufficient to generate discharge, thereby bringing about potential safety hazards. In this case, there are two types of optional conductor 300 fixed towers, the tension tower and the tangent tower 10. Generally, the strain tower is arranged to fix the lead 300, but the strain tower has heavy weight and the strain insulator string 200 has high cost, so that the whole cost of the strain tower is high. The tangent tower 10 is the tower type most commonly used for power transmission lines, and is also called a line tower. In power transmission lines the tangent tower 10 is typically used to support the weight of the conductor 300, i.e. the vertical load. The common tangent tower 10 types include a dry type, a cup type, a cat head type and the like. Insulator strings 200 are arranged on two sides of the tower body 100 of the linear tower 10. Under the condition of wind, the insulator string 200 is easily blown to the tower body by the wind, so that the electrical distance is insufficient, and discharge is generated to generate potential safety hazards. Therefore, the existing tangent tower 10 has high requirements for construction environment, and the height of the tangent tower 10 needs to be designed to be high to meet the construction requirements, so that the construction difficulty and the construction cost are further increased.

Compared with the conventional linear tower 10, the arrangement mode that the conducting wires 300 are arranged on two sides of the tower body 100 is adopted. In the present embodiment, the tower body 100 structure of the linear tower 10 is adopted, and the conducting wire 300 is supported and arranged above the tower top 110 of the tower body 100 through the insulator string 200. The wires 300 and the insulator string 200 are supported by each other, so that the wires 300 are difficult to touch the tower body 100 even under the condition of strong wind. It can be ensured that the wire 300 is always kept within a safe electrical distance range. The reliability and safety of the linear tower 10 structure are further ensured. And because the wire 300 is higher than the tower body 100, the tower height of the breakable tangent tower 10 of the embodiment is lower than that of the conventional tangent tower 10, so that the tangent tower 10 of the embodiment has lower manufacturing cost, smaller construction difficulty, and is safer and more reliable. Meanwhile, the lead 300 is always kept at a safe electrical distance from obstacles in the surrounding environment, and also can be kept at a safe electrical distance from the tower body 100. The safety and the practicability of the breakable tangent tower 10 in the embodiment are further ensured.

The disconnectable state in this embodiment means that the lead 300 is fixed and does not cause windage yaw. The tension tower and the tangent tower do not generate windage yaw, but the openable tangent tower 10 in the embodiment does not generate windage yaw.

In one embodiment, the number of the tower bodies 100 is at least two, the number of the insulator strings 200 is set to correspond to the number of the tower bodies 100, and the lead 300 can be connected to the insulator strings 200 on different tower bodies 100. At least two tower bodies 100 and insulator strings 200 can ensure the supporting reliability of the lead 300 between different tower bodies 100 through the insulator strings 200. And also enables the wires 300 to provide support for the insulator strings 200 on the tops 110 of different towers 100. And then, the reliability and the practicability of the power transmission network are ensured.

Referring to fig. 1 and 2, in one embodiment, the number of the insulator strings is at least two, and the other ends of at least two insulator strings are respectively connected to the wires and are respectively disposed at two sides of the wires in the length direction. The two insulator strings 200 support the lead 300 from both sides of the lead 300, so that the stability between the lead 300 and the tower top 110 can be ensured, and a safe electrical distance can be ensured. The lead 300 can be kept in a relatively stable state through the pulling force of the two insulator strings 200 when the lead 300 is to shake left and right, so that the left and right shaking is avoided to a large extent, and the safe electrical distance between the lead 300 and surrounding environment barriers is further ensured.

Referring to fig. 1 and 2, in one embodiment, the number of the insulator strings is two, two insulator strings are arranged at intervals at one end of the tower top where the two insulator strings are connected, and the other ends of the two insulator strings far away from the tower body are in contact with each other. Specifically, the two insulator strings and the tower top enclose a triangle, and the triangle is a regular triangle. The tower top 110 forms the base of the triangle, and the conductive line 300 is located at the top corner of the triangle. The two insulator strings 200 can stably apply a balance force in the horizontal direction to the lead wire 300, and the lead wire 300 is prevented from shaking left and right. Meanwhile, the two insulator strings 200 support the conducting wire 300 from two sides of the conducting wire 300, so that the stability and reliability of the structure of the conducting wire 300 relative to the tower body 100 can be further ensured. The triangular arrangement enables the stress between the lead 300 and the insulator string 200 to be more reasonable and reliable in mechanical analysis. In this embodiment, the triangle is a regular triangle. Of course, the shape of the triangle may be changed according to the actual working condition and the setting mode, and is not limited to the regular triangle in the embodiment, and may be an acute triangle or an obtuse triangle. As long as it is ensured that the wires 300 are kept at a safe electrical distance from the tower body 100 and obstacles in the surrounding environment.

In other embodiments, the insulator string 200 and the tower top 110 can also enclose other shapes. Such as rectangular, circular, or other irregular polygonal shapes, etc. As long as the insulator string 200 and the lead 300 are connected such that the lead 300 is higher than the tower top 110 in the gravity direction and a stable interval exists between the lead and the tower top 110 to secure a safe electrical distance.

In one embodiment, the insulator string 200 includes an insulator having a through hole, and a connecting portion passing through the through hole, and two ends of the connecting portion are respectively connected to the tower top 110 and the wire 300. In one embodiment, the number of the insulators is at least two, and at least two insulators are arranged on the connecting portion in a penetrating mode.

In one embodiment, the insulator is a flexible insulator. The flexible insulator is a flexible structural member. The flexible insulator can elastically deform under stress. The flexible insulator comprises an insulating core body and an umbrella cover. With metal attachments. The appearance is similar to a rigid insulator. The core rod is formed by compounding high-strength insulating fibers and flexible resin. The flexible core has high electrical performance and tensile failure strength, and can not generate any damage after repeated bending, twisting and bending alternation. The umbrella cover is made of high-temperature vulcanized silicone rubber or fluorosilicone rubber material. The U-shaped ring and the ball head ring fittings at the two ends can freely rotate around the fixing bolt. The flexible insulator can not only prevent the lead 300 from vibrating, but also prevent the internal structure of the insulator string 200 from being damaged. The elastic property of the flexible insulator can convert mechanical impact kinetic energy generated by the vibration of the wire 300 on the insulator and the rigid hardware fitting into potential energy, and effectively prevent the mechanical fatigue damage or fracture of the insulator and the hardware fitting caused by the vibration impact mechanical load.

Referring to fig. 1 and 2, in an embodiment, the number of the wires 300 is at least two, each of the wires 300 is connected to the tower top 110 through at least two insulator strings 200, at least two of the wires 300 are respectively located at two sides of the tower body 100, and two adjacent wires 300 are arranged at intervals. Specifically, two insulators close to each other on two adjacent wires 300 are arranged at intervals. A safe electrical distance between the two wires 300 can be further ensured.

A method of constructing a linear tower 10, the method comprising the steps of:

acquiring the sag height of the sag under the condition that the lead 300 is loosened after erection;

obtaining a planned height of the tower body 100 according to the requirements of the sag height and the electrical distance of the lead 300;

a part of the tower body 100 is built; a part of the tower body 100 has a height below the planned height;

setting a ground wire for paying off; one end of the ground wire is connected with the tower body 100, and the other end of the ground wire is grounded;

building another part of said tower body 100 on the basis of a part of said tower body 100 such that the height of said tower body 100 reaches said planned height;

tightening the ground wire;

an insulator string 200 is arranged on the tower top 110, and one end of the insulator string 200, which is far away from the tower body 100, is connected with the lead 300.

Since the conductor 300 is located above the tower top 110 of the tower body 100, it is not possible to build all parts of the tower body 100 at once. The wire 300 may have a certain amount of sagging after installation. Therefore, before the assembly, the lowest point height of the conductor 300 in the case of loosening after erection, namely the sag height of the sag, should be obtained. And according to the construction safety requirement and the safety electrical distance, obtaining the planned height of the finished tower body 100. Then, the tower body 100 is partially constructed, and the part of the tower body 100 is lower than the planned height, so that the safety of the subsequent construction of the tower body 100 can be ensured. And further, the ground wire is connected to part of the tower body 100 and is paid out, so that the construction safety is further ensured. After the ground wire is completed, the remainder of the tower body 100 is completed. The tower 100 is brought to the planned height. And finally, tightening the ground wire to finish construction.

The construction mode is different from the conventional tangent tower 10 structure based on the structure of the breakable tangent tower 10 in the embodiment, and therefore, the construction mode is obviously different from the conventional construction mode. In the conventional tangent tower 10, since the wire 300 is hung below the tower top 110, the entire tower body 100 is generally constructed, and then the ground wire is laid, and then the wire 300 is hung below the tower top 110. In the present embodiment, since the wire 300 is located above the tower top 110 of the tower body 100, if a conventional construction method is used, the tower body 100 may collide with the wire 300 during the construction process, which may cause a safety accident. Care needs to be taken at all times during construction to ensure a safe distance between the tower body 100 and the conductor 300. It is not possible to build all parts of the tower 100 at once. According to the construction method, a part of the tower body 100 is firstly built, the safe distance between the tower body 100 and the conducting wire 300 is guaranteed, then the conducting wire is laid to be connected with the tower body 100, and the safety of the tower body 100 and construction is further guaranteed. After the safety is ensured, the rest part of the tower body 100 is further completed, so that the tower body 100 reaches the planned height, and the construction of the tangent tower 10 is completed by tightening the ground wire.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may directly conflict with the first and second features, or the first and second features may indirectly conflict with each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A breakable linear tower, comprising:

a tower body;

one end of the insulator string is arranged on the tower top of the tower body; and

and the wire is connected with one end, far away from the tower body, of the insulator string, so that the position of the wire in the gravity direction is higher than that of the tower top.

2. The breakable tangent tower according to claim 1, wherein the number of the insulator strings is at least two, and the other ends of the at least two insulator strings are respectively connected to the wires and are respectively arranged at two sides of the wires in the length direction.

3. The breakable tangent tower according to claim 2, wherein the number of the insulator strings is two, two insulator strings are arranged at intervals at one end connected to the top of the tower, and the other ends of the two insulator strings far away from the tower body are in contact with each other.

4. The breakable tangent tower of claim 3, wherein the two insulator strings and the tower top enclose a triangle, the triangle being a regular triangle.

5. The breakable tangent tower according to claim 2, wherein the insulator string comprises an insulator and a connecting portion, the insulator is provided with a through hole, the connecting portion is arranged in the through hole in a penetrating manner, and two ends of the connecting portion are respectively connected with the tower top and the wire.

6. The breakable tangent tower according to claim 5, characterized in that the number of the insulators is at least two, and at least two insulators are arranged on the connecting portion in a penetrating manner.

7. The breakable tangent tower according to claim 5, characterized in that the insulator is a flexible insulator which can be elastically deformed by a force.

8. The breakable tangent tower according to any one of claims 1 to 7, wherein the number of the wires is at least two, each of the wires is connected to the top of the tower through at least two insulator strings, at least two of the wires are respectively located on two sides of the tower body, and two adjacent wires are arranged at intervals.

9. The breakable tangent tower of claim 8, wherein the number of the tower bodies is at least two, the number of the insulator strings is set corresponding to the number of the tower bodies, and the wires can be connected with the insulator strings on different tower bodies.

10. A construction method of a breakable tangent tower is characterized by comprising the following steps:

acquiring the sag height of the sag under the condition that the lead is loosened after erection;

obtaining the planned height of the tower body according to the requirements of the sag height and the electrical distance of the lead;

building part of the tower body; part of the tower body is lower than the planned height;

setting a ground wire for paying off; one end of the ground wire is connected with the tower body, and the other end of the ground wire is grounded;

building a further part of said tower on the basis of a part of said tower such that said tower height reaches said planned height;

tightening the ground wire;

and an insulator string is arranged on the tower top, and one end of the insulator string, which is far away from the tower body, is connected with the lead.

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