CN111682479B - Single-loop power transmission line iron tower and power transmission line tower system - Google Patents
Single-loop power transmission line iron tower and power transmission line tower system Download PDFInfo
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- CN111682479B CN111682479B CN202010628601.2A CN202010628601A CN111682479B CN 111682479 B CN111682479 B CN 111682479B CN 202010628601 A CN202010628601 A CN 202010628601A CN 111682479 B CN111682479 B CN 111682479B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
- E04H12/10—Truss-like structures
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/22—Sockets or holders for poles or posts
- E04H12/2207—Sockets or holders for poles or posts not used
- E04H12/2215—Sockets or holders for poles or posts not used driven into the ground
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/24—Cross arms
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/20—Spatial arrangements or dispositions of lines or cables on poles, posts or towers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/22—Arrangements of earthing wires suspended between mastheads
Abstract
The embodiment of the invention relates to a single-circuit power transmission line iron tower and a power transmission line tower system. Belong to transmission line technical field, this single circuit transmission line iron tower includes: the tower body, the crank arm, the ground wire frame, the wire cross arm and the additional cross arm; the tower body is buried in the ground, and the crank arm is connected with the tower body; the wire cross arm comprises a first wire cross arm, a second wire cross arm and a third wire cross arm which are connected in sequence, and the second wire cross arm is connected with the crank arm; the ground wire rack comprises at least one first ground wire rack and a second ground wire rack, the first ground wire rack is connected with the first wire cross arm, and the second ground wire rack is connected with the third wire cross arm; the additional cross arm is connected with the first wire cross arm or the third wire cross arm, the ground wire is arranged on the additional cross arm which gets over the tower drill and the gear, and the ground wire is not arranged on the additional cross arm which does not get over the gear. The embodiment of the invention realizes that the ground wire is not disconnected when the power transmission line crosses the drill, so that the ground wire with the communication function can still ensure continuous and uninterrupted communication under the condition of crossing the drill.
Description
Technical Field
The embodiment of the invention relates to the technical field of power transmission lines, in particular to a single-circuit power transmission line iron tower and a power transmission line tower system.
Background
Overhead transmission lines usually need to span several kilometers or tens of kilometers, and different overhead transmission lines in the same area are often crossed, and when the crossing occurs, a low-voltage-level line needs to drill a higher-voltage-level line. In the construction process of the power transmission line, the electrical safety distance between the power transmission line and the drilled power transmission line needs to be satisfied on one hand, and the electrical safety distance between the power transmission line and the ground needs to be satisfied on the other hand, if the clearance distance between the power transmission line and the ground is smaller, the electrical safety distance between the power transmission line and the ground cannot be satisfied any more when the power transmission line is drilled and the ground is crossed, and the drilling is difficult. Therefore, it is necessary to provide a single-circuit transmission line tower and a transmission line tower to solve the above technical problems.
The single-circuit transmission line iron tower provided by the related art can reselect other drilling positions or lift the height of the drilled transmission line so as to solve the problem of electrical safety distance between the drilled transmission line and the drilled transmission line.
However, the engineering investment is increased by reselecting the drilling position or lifting the height of the power transmission line to be drilled; and for the power transmission line with the unique drilling position, the problem cannot be solved by changing the drilling position.
Disclosure of Invention
The embodiment of the invention provides a single-circuit power transmission line iron tower and a power transmission line tower system, which can solve the problem that the engineering investment is increased due to the fact that the drilling position is reselected or the height of a drilled power transmission line is lifted; and the technical problem that the power transmission line with the unique drilling position cannot be solved by changing the drilling position can be solved. The technical scheme is as follows:
in one aspect, a single-circuit power transmission line iron tower is provided, which includes: the tower body, the crank arm, the ground wire frame, the wire cross arm, the additional cross arm and the spacing rod;
the tower body is buried in the ground, and the crank arm is connected with the tower body;
the wire cross arm comprises a first wire cross arm, a second wire cross arm and a third wire cross arm which are connected in sequence, and the second wire cross arm is connected with the crank arm;
the ground wire frames comprise a first ground wire frame and a second ground wire frame, the first ground wire frame is connected with the first lead cross arm, the second ground wire frame is connected with the third lead cross arm, the first ground wire frame and the second ground wire frame which cross the tower and do not cross the tower and cross the gear are provided with ground wires, and the first ground wire frame and the second ground wire frame which cross the gear are not provided with ground wires;
the additional cross arm is connected with the first wire cross arm or the third wire cross arm, a ground wire is arranged on the additional cross arm for crossing the tower and crossing the gear, and a ground wire is not arranged on the additional cross arm for crossing the gear without drilling;
the ground wires of the first and second ground wire racks which do not cross and cross the tower are led to the cross drilling gear of the additional cross arm by the additional cross arm when the tower is crossed, so that the non-cross drilling gear ground wires are connected with the cross drilling gear ground wires, the cross drilling ground wires of the power transmission line are not disconnected, and the ground wires with the communication function can still ensure continuous and uninterrupted communication under the cross drilling condition; the spacers are disposed between the wires.
In an optional implementation manner, the single-circuit power transmission line tower further includes: the first ground wire frame and the second ground wire frame are both provided with the non-drilling and grade-crossing ground wire hanging points.
In an optional embodiment, the non-drilling-through ground wire hanging points on the first ground wire rack and the second ground wire rack are all located on the same horizontal line.
In an optional embodiment, the first ground wire frame is a first conical body with a reduced taper angle from a first end to a second end, the first end of the first conical body is connected with the first wire cross arm, and the second end of the first ground wire frame is provided with the non-drilling-beyond ground wire hanging point;
the second ground wire rack is a second cone with a taper angle decreasing from the first end to the second end, the first end of the second cone is connected with the third lead cross arm, and the second end of the second ground wire rack is provided with the non-drilling and crossing gear ground wire hanging point.
In an optional embodiment, a first preset angle is formed between the first ground frame and the first wire cross arm, a second preset angle is formed between the second ground frame and the third wire cross arm, and the direction angle of the first preset angle is the same as that of the second preset angle.
In an optional implementation manner, the single-circuit power transmission line tower further includes: and the first wire cross arm, the second wire cross arm and the third wire cross arm are all provided with the wire hanging points.
In an optional embodiment, the wire hanging points on the first wire cross arm, the second wire cross arm and the third wire cross arm are all located on the same horizontal line.
In an optional implementation manner, the single-circuit power transmission line tower further includes: and the additional cross arm is provided with the ground wire hanging point for crossing the gear.
In an optional implementation manner, the single-circuit power transmission line tower further includes: and the additional cross arm is provided with the ground wire outgoing line hanging point.
On the other hand, the power transmission line tower system comprises the single-circuit power transmission line iron tower.
The technical scheme of the embodiment of the invention has the following beneficial effects:
according to the single-circuit transmission line iron tower provided by the embodiment of the invention, the ground wire can be arranged on the ground wire frame without drilling the crossing gear by arranging the ground wire frame, the ground wire is not arranged on the ground wire frame without drilling the crossing gear, and the ground wire and the lead are positioned on the same horizontal line due to the fact that the height of the ground wire in the drilling-crossing gear is reduced compared with that of the ground wire in the non-drilling-crossing gear, so that the vertical distance between the lead in the drilling-crossing gear and the ground wire is compressed, the safe electrical distance between the lead in the drilling-crossing gear and the ground wire is more easily met while the electric transmission line is drilled to meet the electrical safety distance between the transmission line and the drilled-crossing gear, and the feasibility of cross drilling of the transmission line is effectively improved. The additional cross arm is arranged, so that the ground wire of the ground wire rack is led to the additional cross arm, the non-drilling-crossing ground wire is connected with the drilling-crossing ground wire, the non-disconnection of the crossing-crossing ground wire of the power transmission line is realized, and the continuous and uninterrupted communication of the ground wire with the communication function can be ensured under the crossing-crossing condition.
Drawings
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 structural diagram of a single-circuit power transmission line iron tower provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of a single-circuit power transmission line iron tower provided by the embodiment of the invention;
fig. 3 is a schematic structural diagram of a power transmission line tower system provided in an embodiment of the present invention.
Detailed Description
Unless defined otherwise, all technical terms used in the examples of the present invention have the same meaning as commonly understood by one of ordinary skill in the art.
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Overhead transmission lines usually need to span several kilometers or tens of kilometers, and different overhead transmission lines in the same area are often crossed, and when the crossing occurs, a low-voltage-level line needs to drill a higher-voltage-level line. In the construction process of the power transmission line, the electrical safety distance between the power transmission line and the drilled power transmission line needs to be satisfied on one hand, and the electrical safety distance between the power transmission line and the ground needs to be satisfied on the other hand, if the clearance distance between the power transmission line and the ground is smaller, the electrical safety distance between the power transmission line and the ground cannot be satisfied any more when the power transmission line is drilled and the ground is crossed, and the drilling is difficult. In order to enable the power transmission line to be drilled and crossed to meet the requirements of related electrical distances easily and ensure the continuity of communication ground wires when the power transmission line crosses, the invention provides a single-circuit power transmission line iron tower and a power transmission line system, and aims to solve the technical problems.
In one aspect, a single-circuit power transmission line tower is provided, as shown in fig. 1, the single-circuit power transmission line tower includes: the tower comprises a tower body 1, a crank arm 2, a ground wire frame, a wire cross arm 4, an additional cross arm 5 and a spacer;
the tower body 1 is buried in the ground, and the crank arm 2 is connected with the tower body 1;
the wire cross arm comprises a first wire cross arm 41, a second wire cross arm 42 and a third wire cross arm 43 which are connected in sequence, and the second wire cross arm 42 is connected with the crank arm 2;
the ground wire frames comprise a first ground wire frame 31 and a second ground wire frame 32, the first ground wire frame 31 is connected with a first lead cross arm 41, the second ground wire frame 32 is connected with a third lead cross arm 43, the first ground wire frame 31 and the second ground wire frame 32 which drill the tower and do not drill the crossing gear are provided with ground wires, and the first ground wire frame 31 and the second ground wire frame 32 which drill the crossing gear are not provided with ground wires;
the additional cross arm 5 is connected with the first wire cross arm 41 or the third wire cross arm 43, the ground wire is arranged on the additional cross arm 5 which crosses the tower beyond the drill, and the ground wire is not arranged on the additional cross arm 5 which does not cross the tower beyond the drill;
the ground wires of a first ground wire frame 31 and a second ground wire frame 32 which are used for drilling non-drilling grade crossing over the tower are led to the drilling grade crossing of the additional cross arm 5 through the additional cross arm 5 when the tower is crossed, the non-drilling grade crossing ground wire is connected with the drilling grade crossing ground wire, the power transmission line cross drilling grade crossing ground wire is not disconnected, and the ground wire with the communication function can still ensure continuous and uninterrupted communication under the condition of cross drilling; the spacers are disposed between the wires.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
according to the single-circuit transmission line iron tower provided by the embodiment of the invention, the ground wire can be arranged on the ground wire frame without drilling the crossing gear by arranging the ground wire frame, the ground wire is not arranged on the ground wire frame without drilling the crossing gear, and the height of the ground wire in the drilling-crossing gear is reduced compared with that of the ground wire in the non-drilling-crossing gear, so that the ground wire and the lead wire are approximately positioned on the same horizontal line, the vertical distance between the lead wire in the drilling-crossing gear and the ground wire is compressed, the safe electrical distance between the lead wire of the drilling-crossing gear and the ground wire is more easily met while the drilling-crossing transmission line meets the safe electrical distance between the drilling-crossing transmission line and the ground, and the feasibility of crossing and drilling of the transmission line is effectively improved. By arranging the additional cross arm 5, the ground wire of the ground wire rack is led to the additional cross arm 5, so that the non-drilling-crossing ground wire of the ground wire rack is connected with the drilling-crossing ground wire of the additional cross arm 5, the non-disconnection of the cross-drilling-crossing ground wire of the power transmission line is realized, and the continuous and uninterrupted communication of the ground wire with the communication function can be ensured under the condition of crossing drilling.
The single-circuit power transmission line tower provided by the embodiment of the invention is further described by the optional embodiment.
It should be noted that the minimum distance to be kept between people and the charged body, between the charged body and the ground (water surface), between the charged body and other facilities is also called as the safe clear distance and the safe distance. The safety distance is to ensure that flashover discharge does not occur under the action of various possible maximum working voltages or overvoltage, and also to ensure absolute safety of workers in inspection, operation, maintenance and overhaul of the electrical equipment. When the actual distance is greater than the safe distance, the human body and the equipment are safe. The safety distance is used for preventing a human body from touching or excessively approaching the charged body to cause electric shock, and is also used for preventing objects such as vehicles from colliding or excessively approaching the charged body and preventing fire and electric accidents caused by discharge and short circuit between the charged bodies. The safe distance is divided into a line safe distance, a transformation and distribution equipment safe distance and a maintenance safe distance.
The line safety distance refers to the minimum allowable distance between a conducting wire and the ground (water surface), tower members and spanning objects (including power lines and weak current lines). The safe distance of the transformer and distribution equipment refers to the minimum allowable distance between a charged body and other charged bodies, a grounding body, various barriers and other facilities. The overhaul safety distance refers to the minimum allowable distance between the staff and the electrified part of the equipment when the staff carries out equipment maintenance and overhaul. The distance can be divided into a safe distance when the equipment is not powered off, a safe distance between a normal moving range of a worker and the electrified equipment during working, and a safe distance between a human body and an electrified body during live working.
The safety distance between the charged body and the charged body is the electrical safety distance between the power transmission line drilled through and the power transmission line drilled through in the embodiment of the present application.
It should be noted that the electricity generated by the power plant is not only used by people nearby, but also transmitted to a remote place to meet more needs. This electricity cannot be transmitted directly through ordinary electric lines but is transmitted by high voltage transmission lines. Generally, transmission voltages of 220 kv or less are called high-voltage transmission, transmission voltages of 330 kv to 765 kv are called ultra-high-voltage transmission, and transmission voltages of 1000 kv or more are called ultra-high-voltage transmission.
High-voltage transmission lines are divided into cable transmission lines and overhead transmission lines. The overhead transmission line adopts a transmission tower to suspend a lead and a ground wire in the air, so that certain safe distances are kept between the lead and the lead, between the lead and the ground wire, between the lead and the tower and between the lead and a ground obstacle, and the transmission task is completed. The power transmission line used by the single-circuit power transmission line iron tower provided by the embodiment of the invention belongs to the overhead power transmission line. The tower body 1 is connected with the crank arm 2, and a lead and a ground wire are overhead, so that the electrical safety distance between the lead and the ground is met.
It should be noted that the tower body 1 provided in the embodiment of the present invention is a strain tower body 1. The whole tower body 1 is in a ladder-shaped structure.
The specific size of the tower body 1 is determined by the electrical gap distance, the horizontal arrangement line pitch of the conductive wires, the ground line lightning protection angle, the horizontal distance of the conductive ground lines, and the like, and the sizes of the first ground frame 31, the second ground frame 32, the first conductive cross arm 41, the second conductive cross arm 42, the third conductive cross arm 43, and the additional cross arm 5 may also be determined by the electrical gap distance, the horizontal arrangement line pitch of the conductive wires, the ground line lightning protection angle, the horizontal distance of the conductive ground lines, and the like. The sizes of the first ground frame 31, the second ground frame 32, the first wire cross arm 41, the second wire cross arm 42, the third wire cross arm 43 and the additional cross arm 5 are not limited in the embodiment of the application.
The first wire cross arm 41, the second wire cross arm 42 and the third wire cross arm 43 provided by the embodiment of the invention can be connected by welding, so as to ensure the support stability of wires, ground wires or optical cables.
As an example, the first wire cross arm 41, the second wire cross arm 42 and the third wire cross arm 43 provided by the embodiment of the present invention may be rectangular support cross arms. The embodiments of the present invention are not limited to this shape.
Second wire cross arm 42 and crank arm 2 may be formed integrally by stamping, or may be connected by welding, so as to ensure the connection stability between third wire cross arm 43 and crank arm 2.
It should be noted that, because a certain distance is also kept between the wires drilled over the tower, by providing the additional cross arm 5, a wire supporting point can be provided by the additional cross arm 5, the distance between the wires is enlarged, and the electrical safety distance between the wires is satisfied.
In an optional implementation manner, as shown in fig. 2, the single-circuit power transmission line tower further includes: the non-drilling-grade-crossing ground wire hanging point 6 is arranged on the first ground wire frame 31 and the second ground wire frame 32, and the non-drilling-grade-crossing ground wire hanging point 6 is arranged on the second ground wire frame 32.
It should be noted that, referring to fig. 2, one side of the drilled tower is a conventional tower, the other side is the drilled tower, the wire and ground span between the drilled tower and the conventional tower are non-drilled steps, i.e., normal steps, and the wire and ground span between one drilled tower and another drilled tower are drilled steps.
That is, drilling the conductor and the ground wire in the tower requires drilling the conductor and the ground wire which are drilled over the tower, therefore, the embodiment of the present invention sets the non-drilling-overtaking ground wire hanging point 6, and draws the non-drilling-overtaking ground wire out through the non-drilling-overtaking ground wire hanging point 6. That is, the ground is provided at the non-drilled step of the ground frame 3, the ground is allowed to pass through the non-drilled step, and the ground is not provided at the drilled step of the ground frame 3.
The ground wire leading-out wires are respectively led out through the first lead cross arm 41 and the third lead cross arm 43 along the first ground frame 31 and the second ground frame 32, so that the ground wire with the communication function is continuous, and the optical cable communication function is ensured.
The ground wire is a wire connected to the ground, the housing, or the reference potential zero in an electrical system or an electronic device. The ground wire can protect electric shock accidents caused by the fact that the internal insulation of the electrical equipment damages the shell and is electrified.
Generally, the ground wire is located above the wire to ensure the lightning protection safety of the wire. The ground wire and the lead wire provided by the invention are in the same horizontal line, namely the non-drilling-through gear ground wire hanging points 6 on the first ground wire frame 31 and the second ground wire frame 32 are in the same horizontal line, so that the lightning protection safety of the lead wire cannot be ensured through the ground wire. However, the embodiment of the invention can realize the lightning protection of the power transmission line drilled beyond the power transmission line by adjusting the distance between the drilling towers at the two sides of the drilling gear.
In an alternative embodiment, the non-drilling-through ground wire hanging points 6 on the first ground wire rack 31 and the second ground wire rack 32 are all located on the same horizontal line and are arranged horizontally. Therefore, the electrical safety distance between each conducting wire can be ensured, and the electrical safety distance between the conducting wire which goes over the tower and the power transmission line which goes over the tower and is drilled can also be ensured.
In an alternative embodiment, wire hanging points 7 on first wire cross arm 41, second wire cross arm 42 and third wire cross arm 43 are all located on the same horizontal line.
It should be noted that, by setting the wire hanging points 7 on the first wire cross arm 41, the second wire cross arm 42 and the third wire cross arm 43 to be all located on the same horizontal line, it can be ensured that the wires connected to the wire hanging points 7 are all located on the same horizontal line, on one hand, the electrical safety distance between the wires is ensured, and on the other hand, the vertical distance between each wire and the wire or the ground wire of the power transmission line drilled over meets the electrical safety distance.
The single-circuit power transmission line iron tower provided by the embodiment of the invention can effectively reduce the height of the ground wire and ensure the continuity of the communication ground wire, has reliable stress characteristics and good adaptability, and is suitable for drilling and crossing the single-circuit power transmission line with the optical cable ground wires on two sides. It should be noted that when a three-phase conductor is provided on a tower or a tower pole, the conductor is the above-mentioned single-circuit transmission line, and the conductor is generally arranged horizontally or in a triangular shape.
In an alternative embodiment, the first ground frame 31 is a first conical body with a decreasing taper angle from the first end to the second end, the first end of the first conical body is connected to the first wire cross arm 41, and the second end of the first ground frame 31 has a non-over-drilling ground wire hanging point 6;
the second ground wire rack 32 is a second cone with a decreasing taper angle from the first end to the second end, the first end of the second cone is connected with the third wire cross arm 43, and the second end of the second ground wire rack 32 is provided with the non-over-the-bit ground wire hanging point 6.
It should be noted that the non-drilling-grade-crossing ground wire hanging points 6 are arranged on the first ground wire frame 31 and the second ground wire frame 32, that is, no ground wire is arranged on the first ground wire frame 31 and the second ground wire frame 32 which cross the grade, and the non-drilling-grade-crossing ground wire hanging points 6 and the wire hanging points 7 are in the same horizontal line, so that the problem that the electrical safety distance between the drilling-grade transmission line and the drilled-grade transmission line and the ground wire cannot be ensured when the drilling-grade ground wire or the wire crosses the grade is avoided.
In an alternative embodiment, as shown in fig. 2, the first ground frame 31 and the first wire cross arm 41 form a first predetermined angle therebetween, the second ground frame 32 and the third wire cross arm 43 form a second predetermined angle therebetween, and the first predetermined angle and the second predetermined angle have the same direction angle therebetween.
It should be noted that, in the embodiment of the present invention, by setting the direction angles of the first preset angle and the second preset angle to be the same, it can be ensured that the ground wires on the first ground wire frame 31 and the second ground wire frame 32 do not affect the ground wire drilling in the drilling-crossing gear.
As an example, the direction angles of the first preset angle and the second preset angle provided by the embodiment of the present invention may be toward the non-drilling step of the drilling tower. The first predetermined angle and the second predetermined angle may have the same angle magnitude. Therefore, the ground wires connected to the non-drilling crossing gear are all located on the same horizontal line, and the electrical safety distance of the drilling crossing transmission line is not influenced.
In an optional embodiment, as shown in fig. 2, the single-circuit power transmission line tower further includes a wire hanging point 7, and the wire hanging point 7 is disposed on each of the first wire cross arm 41, the second wire cross arm 42, and the third wire cross arm 43.
It should be noted that the first wire cross arm 41, the second wire cross arm 42 and the third wire cross arm 43 are all provided with the wire hanging point 7 to ensure the normal operation of the single-circuit transmission line iron tower.
In an alternative embodiment, the wire hanging points 7 on the first wire cross arm 41, the second wire cross arm 42 and the third wire cross arm 43 are all located on the same horizontal line and are arranged horizontally. Therefore, the electrical safety distance between each conducting wire can be ensured, and the electrical safety distance between the transmission line crossing the tower and the transmission line crossing the tower can be ensured.
It should be noted that, the number of the wire hanging points 7 in the embodiment of the present invention is not limited, and may be determined according to the needs of the power transmission line.
In an optional implementation manner, as shown in fig. 2, the single-circuit power transmission line tower further includes: and the ground wire hanging point 8 of the over-gear drilling is arranged on the additional cross arm 5.
It should be noted that, since no ground wire hanging point is provided at the drilling-passing step of the first ground wire frame 31 and the second ground wire frame 32, that is, no ground wire is provided, in the embodiment of the present invention, the drilling-passing ground wire hanging point 8 is provided on the additional cross arm 5, the ground wire of the drilling-passing step is led out to the drilling-passing step ground wire hanging point 8 of the first lead cross arm 41 and the second lead cross arm 42, and the non-drilling-passing step ground wire is connected to the drilling-passing step ground wire, so that the ground wire with the communication function is not disconnected when the power transmission line crosses the drilling-passing step, and the ground wire with the communication function can still ensure continuous communication under the condition of crossing the drilling-passing step.
The additional cross arm 5 provided by the embodiment of the invention is connected with the first wire cross arm 41 or the third wire cross arm 43, so that the connection is stable, the structure is reasonable, the force transmission is clear, and the structure is reliable. That is, the additional cross arm 5 provided in the embodiment of the present application may be connected to the first wire cross arm 41 or may be connected to the third wire cross arm 43, which is not limited in the embodiment of the present application.
In an optional implementation manner, the single-circuit power transmission line tower further includes: the additional cross arm 5 is provided with a ground wire outgoing line hanging point.
The additional cross arm 5 provided by the embodiment of the present invention is provided with a ground wire outgoing line hanging point, a ground wire connected with the non-skip-through ground wire hanging point 6 on the first ground wire frame 31 is led out to the ground wire outgoing line hanging point on the additional cross arm 5 through the first conductive cross arm 41, and a ground wire connected with the non-skip-through ground wire hanging point 6 on the second ground wire frame 32 is led out to the ground wire outgoing line hanging point on the additional cross arm 5 through the second conductive cross arm 42 and is connected with the skip-through ground wire. According to the embodiment of the invention, the non-drilling grade-crossing ground wire and the drilling grade-crossing ground wire are connected through the ground wire leading-out wire hanging point, so that the ground wire with the communication function is continuous and uninterrupted.
The wire hanging points 7 on the first wire cross arm 41 and the second wire cross arm 42 are located on the same horizontal plane as the ground wire leading line hanging points on the additional cross arm 5. The length of the additional cross arm 5 satisfies the electrical safety distance between the ground wire of the drilling-over gear and the lead.
On the other hand, the power transmission line tower system comprises any one of the single-circuit power transmission line towers.
As an example, as shown in fig. 3, the power transmission line tower system provided by the embodiment of the invention includes a drilling tower a and a drilling tower B, and a distance between the drilling tower a and the drilling tower B is not less than a distance between wires on one side of a drilled step and not more than a maximum lightning protection radiation range distance of a ground wire of the drilled step or the wire of the drilled step to the wire of the drilled step. One side of the drilling tower is communicated with the conventional tower guide and ground wire, and the other side of the drilling tower guide and ground wire is communicated with the drilling tower guide and ground wire; and the ground wire span between the drilling and crossing tower A and the conventional tower is a non-drilling and crossing span, and the ground wire span between the drilling and crossing tower A and the drilling and crossing tower B is a drilling and crossing span.
In the non-drilling crossing gear, the ground wire of the conventional tower ground wire frame is connected to the non-drilling crossing gear ground wire hanging point 6 on the first ground wire frame 31 and the second ground wire frame 32 of the drilling crossing tower A, and the ground wire is positioned above the lead so as to play the lightning protection role on the lead and ensure the safe operation of the circuit.
And in the drill-crossing gear, the ground wire of the drill-crossing gear ground wire hanging point 8 on the additional cross arm 5 of the drill-crossing tower A is communicated with the drill-crossing gear ground wire hanging point 8 on the additional cross arm 5 of the drill-crossing tower B, the drill-crossing gear ground wire hanging point 8 and the wire hanging point 7 are positioned at the same horizontal height, and the drill-crossing gear wire lightning protection is provided by a drilled-crossing line above the drill-crossing gear wire hanging point.
The system provided by the embodiment of the invention realizes the lightning protection of the power transmission line which is drilled beyond by limiting the distance between the tower which is drilled beyond and is arranged at the two sides of the drilling-beyond gear, and the power transmission line which is drilled beyond and is beyond does not need to be provided with any other redundant lightning protection measures; the realization cost is low, and the method is economical and reliable. And through setting up the ground wire frame, can set up the ground wire on the ground wire frame of the non-drilling-crossing shelves, drill and cross the ground wire on the ground wire frame of shelves and do not set up the ground wire, because the height of the ground wire in the drilling-crossing shelves is reduced compared with the non-drilling-crossing shelves, make ground wire and wire be in same horizontal line approximately, compressed and drilled the vertical distance between shelves inner wire, ground wire, make the drilling-crossing transmission line satisfy with the transmission line safety distance that is crossed to be drilled, while being easier to satisfy the transmission line safety distance of drilling-crossing transmission line wire and ground, effectively improve the transmission line and cross the feasibility of drilling-crossing.
The additional cross arm is arranged, so that the ground wire of the ground wire rack is led to the additional cross arm, the non-drilling-crossing ground wire is connected with the drilling-crossing ground wire, the non-disconnection of the crossing-crossing ground wire of the power transmission line is realized, and the continuous and uninterrupted communication of the ground wire with the communication function can be ensured under the crossing-crossing condition.
It should be noted that according to the calculation and analysis of the drilling and crossing tower provided by the embodiment of the present invention, the calculation condition, the structural connection, the bearing capacity, and the manufacturing can all satisfy the existing regulation and specification.
That is to say, the drilling tower provided by the embodiment of the invention meets the design specification requirements, has a novel structure and reasonable integral and local construction, and is particularly suitable for a single-loop single-circuit power transmission line iron tower.
The above description is only an illustrative embodiment of the present invention, and should not be taken as limiting the scope of the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a single return transmission line iron tower which characterized in that, single return transmission line iron tower includes: the tower body (1), the crank arm (2), the ground wire frame (3), the wire cross arm (4), the additional cross arm (5) and the spacing rod;
the tower body (1) is buried in the ground, and the crank arm (2) is connected with the tower body (1);
the wire cross arm (4) comprises a first wire cross arm (41), a second wire cross arm (42) and a third wire cross arm (43) which are sequentially connected, and the second wire cross arm (42) is connected with the crank arm (2);
the ground wire rack (3) comprises at least one first ground wire rack (31) and at least one second ground wire rack (32), the first ground wire rack (31) is connected with the first lead cross arm (41), the second ground wire rack (32) is connected with the third lead cross arm (43), the first ground wire rack (31) and the second ground wire rack (32) which drill over the tower and do not drill over the rail are provided with ground wires, and the first ground wire rack (31) and the second ground wire rack (32) which drill over the tower and cross the rail are not provided with ground wires;
the additional cross arm (5) is connected with the first wire cross arm (41) or the third wire cross arm (43), a ground wire is arranged on the additional cross arm (5) of the more-than-tower drilling step, and a ground wire is not arranged on the additional cross arm (5) of the non-more-than-tower drilling step;
the earth wires of a first earth wire frame (31) and a second earth wire frame (32) which are used for drilling over the tower and are not drilled over the tower are led to the drilling over step of the additional cross arm (5) through the additional cross arm (5) by the drilling over tower, so that the non-drilling over step earth wires are connected with the drilling over step earth wires; the drilling-crossing ground wire and the lead are positioned at the same horizontal height; the spacers are disposed between the wires.
2. The single-circuit power transmission line tower as claimed in claim 1, wherein the first and second ground racks (31, 32) each have a non-over-the-gear ground wire hanging point (6).
3. The single-circuit power transmission line tower as claimed in claim 2, wherein the non-over-the-gear ground wire hanging points (6) on the first ground wire rack (31) and the second ground wire rack (32) are all located on the same horizontal line.
4. The single-circuit power transmission line tower as claimed in claim 2 or 3, wherein the first ground line stand (31) is a first cone-shaped body with a taper angle decreasing from a first end to a second end, the first end of the first cone-shaped body is connected with the first wire cross arm (41), and the second end of the first ground line stand (31) is provided with the non-drilling-crossing ground line hanging point (6);
the second ground wire rack (32) is a second cone with a taper angle decreasing from the first end to the second end, the first end of the second cone is connected with the third lead cross arm (43), and the second end of the second ground wire rack (32) is provided with the non-drilling-crossing ground wire hanging point (6).
5. The single-circuit power transmission line iron tower of claim 1, wherein a first preset angle is formed between the first ground frame (31) and the first wire cross arm (41), a second preset angle is formed between the second ground frame (32) and the third wire cross arm (43), and the direction angles of the first preset angle and the second preset angle are the same.
6. The single-circuit power transmission line iron tower according to claim 1, wherein the first wire cross arm (41), the second wire cross arm (42) and the third wire cross arm (43) are all provided with wire hanging points (7).
7. The single-circuit power transmission line tower as claimed in claim 6, wherein the wire hanging points (7) on the first wire cross arm (41), the second wire cross arm (42) and the third wire cross arm (43) are all located on the same horizontal line.
8. The single-circuit power transmission line tower as claimed in claim 1, wherein the additional cross arm (5) is provided with an over-grade ground wire hanging point (8).
9. The single-circuit power transmission line tower as claimed in claim 1, wherein the additional cross arm (5) is provided with a ground wire outgoing line hanging point.
10. A transmission line tower system, characterized in that it comprises a single-circuit transmission line tower according to any one of claims 1 to 9; wherein, bore and cross the distance between shelves both sides brill tower more and satisfy: the distance between the wires of the drilled-out barrier is not less than and not more than the maximum lightning protection radiation range distance between the ground wire or the wire of the drilled-out barrier and the wire of the drilled-out barrier.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459329A (en) * | 2007-12-13 | 2009-06-17 | 上海波汇通信科技有限公司 | Middle joint of high voltage electric cable for connecting composite optical fiber and connecting method |
| CN201687253U (en) * | 2010-06-09 | 2010-12-29 | 河北省电力勘测设计研究院 | Tangent tower for transmission lines |
| CN204497701U (en) * | 2014-09-23 | 2015-07-22 | 内蒙古电力勘测设计院有限责任公司 | A kind of boring for the formula of passing through of the single loop of power transmission sequence in various electric pressure gets over bar |
| CN104901255A (en) * | 2015-06-16 | 2015-09-09 | 国网山东省电力公司经济技术研究院 | High-voltage overhead line crossing method and safe distance separating device |
| CN204663116U (en) * | 2015-06-05 | 2015-09-23 | 国家电网公司 | More steel pipe pole is bored in the anisopleual arrangement of a kind of 35kV double back |
| CN106088774A (en) * | 2016-08-08 | 2016-11-09 | 成都城电电力工程设计有限公司 | A kind of 500kV single back line bores more extra high voltage line wineglass tower |
| CN107575081A (en) * | 2017-08-31 | 2018-01-12 | 国核电力规划设计研究院有限公司 | A kind of transposition tower and its interchanging method |
| CN110453959A (en) * | 2019-07-23 | 2019-11-15 | 国网山东省电力公司青岛供电公司 | A kind of double loop, which is bored, gets over steel pipe pole and transmission system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101442194A (en) * | 2008-09-11 | 2009-05-27 | 山西省电力公司送变电工程公司 | Spanning method for ultra, extra high voltage line construction without crossover frame |
| US8785768B2 (en) * | 2009-09-08 | 2014-07-22 | Shenzhen Power Supply Burea of Guangdong Power Grid Corp. | Method for vertically grounding and leading down from outer side of composite material pole tower and pole tower thereof |
| CN201963014U (en) * | 2011-03-31 | 2011-09-07 | 河北省电力勘测设计研究院 | 220-kilovolt full-angle single circuit drilling tower |
| CN202718447U (en) * | 2012-08-08 | 2013-02-06 | 邯郸供电公司 | Steel tower for 110kV double circuits to penetrate through |
| CN205243135U (en) * | 2015-12-16 | 2016-05-18 | 龙源（北京）风电工程设计咨询有限公司 | Two times overhead transmission line alternately bores tower more |
| CN109386158A (en) * | 2018-11-28 | 2019-02-26 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of big corner single loop gate brill more tower for scissors crossing |
| CN209924555U (en) * | 2019-04-29 | 2020-01-10 | 福建永福电力设计股份有限公司 | 220kV single-loop strain drill crossing tower |
-
2020
- 2020-07-02 CN CN202010628601.2A patent/CN111682479B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101459329A (en) * | 2007-12-13 | 2009-06-17 | 上海波汇通信科技有限公司 | Middle joint of high voltage electric cable for connecting composite optical fiber and connecting method |
| CN201687253U (en) * | 2010-06-09 | 2010-12-29 | 河北省电力勘测设计研究院 | Tangent tower for transmission lines |
| CN204497701U (en) * | 2014-09-23 | 2015-07-22 | 内蒙古电力勘测设计院有限责任公司 | A kind of boring for the formula of passing through of the single loop of power transmission sequence in various electric pressure gets over bar |
| CN204663116U (en) * | 2015-06-05 | 2015-09-23 | 国家电网公司 | More steel pipe pole is bored in the anisopleual arrangement of a kind of 35kV double back |
| CN104901255A (en) * | 2015-06-16 | 2015-09-09 | 国网山东省电力公司经济技术研究院 | High-voltage overhead line crossing method and safe distance separating device |
| CN106088774A (en) * | 2016-08-08 | 2016-11-09 | 成都城电电力工程设计有限公司 | A kind of 500kV single back line bores more extra high voltage line wineglass tower |
| CN107575081A (en) * | 2017-08-31 | 2018-01-12 | 国核电力规划设计研究院有限公司 | A kind of transposition tower and its interchanging method |
| CN110453959A (en) * | 2019-07-23 | 2019-11-15 | 国网山东省电力公司青岛供电公司 | A kind of double loop, which is bored, gets over steel pipe pole and transmission system |
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|---|---|
| CN111682479A (en) | 2020-09-18 |
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