Double-loop terminal tower for high-low power transformation framework

Abstract

The utility model relates to the technical field of power transmission lines, in particular to a double-loop terminal tower for a high-low framework of a power transformation, which is characterized in that two ground wire brackets are provided with ground wire hanging points; upper return edge hanging points are arranged on the upper-layer cross arms; an upper return middle-phase hanging point located between the two upper return side-phase hanging points is arranged on the tower head; the upper return middle hanging point and the two upper return edge hanging points are positioned on the same vertical plane and form a first reference surface; lower return edge hanging points are arranged on the two lower-layer cross arms; a distance along the length direction a of the tower head is formed between the upper return edge hanging point and the lower return edge hanging point; the tower head is provided with a lower return middle-phase hanging point located between the two lower return side-phase hanging points. The lower return middle-phase hanging point and the two lower return edge hanging points are located on the same vertical plane and form a second reference plane; a distance is formed between the first reference surface and the second reference surface along the width direction of the tower head. The problem that high-low framework wire inlet is difficult is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission lines, in particular to a double-circuit terminal tower used for a high-low structure of a power transformation. Background Art

[0002] Power engineering is divided into three parts: power generation, transmission and substation. A substation is a place where voltage is changed. In order to transmit the electricity generated by a power plant to a distant place, the voltage must be increased and converted into high voltage electricity. When it reaches the vicinity of the user, the voltage must be lowered as needed. This work of raising and lowering voltage is completed by the substation. Due to site restrictions or the need for inlet and outlet lines, the substation structure often adopts a high-low structure with two layers arranged horizontally, that is, the upper layer is one circuit and the lower layer is another circuit. The wires are led out or introduced from the structure through the terminal tower, which usually includes the following two structural forms:

[0003] The first type uses two single-loop conductors, one of which is routed through one terminal tower and the other through another terminal tower. The conductors on a single terminal tower are arranged in a triangular or horizontal structure. The two terminal towers are arranged at intervals. To ensure electrical safety, the distance between the two terminal towers should meet the line spacing requirements. However, in actual applications, the outgoing angle of the frame often does not meet the frame design requirements.

[0004] The second type adopts a double-circuit conductor structure. The double-circuit conductor is routed through a terminal tower. One circuit is set on one side of the terminal tower, and the other circuit is set on the other side. The hanging points of each circuit on the terminal tower are arranged in pairs in the vertical direction. Since the distance between the terminal tower and the frame is generally within 100m, the distance between the upper and lower layers of the conductor in a short distance often does not meet the electrical safety requirements. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a double-circuit terminal tower for a high-low structure of a power transformation, so as to solve the problem of difficulty in line entry of the high-low structure.

[0006] The utility model solves the technical problem by adopting the following technical solution: a double-circuit terminal tower for a high-low structure of a power transformation comprises a supporting structure, a tower head, a ground wire bracket, an upper cross arm and a lower cross arm; the tower head is arranged on the supporting structure; the ground wire bracket, the upper cross arm and the lower cross arm are all connected to the tower head and arranged in sequence from top to bottom;

[0007] There are two ground wire brackets, which are respectively located at the two ends of the tower head in the length direction a; the ground wire brackets are provided with ground wire hanging points;

[0008] Two upper cross arms are provided, and the two upper cross arms are respectively located at the two ends of the tower head in the length direction a; the upper cross arms are provided with upper return side hanging points; the tower head is provided with an upper return middle hanging point located between the two upper return side hanging points; the upper return middle hanging point and the two upper return side hanging points are located on the same vertical plane and form a first reference plane;

[0009] There are two lower cross arms, which are respectively located at the two ends of the length direction a of the tower head; lower return side hanging points are arranged on the lower cross arms; there is a spacing between the upper return side hanging point and the lower return side hanging point along the length direction a of the tower head; a lower return middle hanging point located between the two lower return side hanging points is arranged on the tower head; the lower return middle hanging point and the two lower return side hanging points are located on the same vertical plane and form a second reference plane; the first reference plane and the second reference plane are spaced along the width direction of the tower head.

[0010] Furthermore, there is a distance a between the ground wire hanging point and the upper return side hanging point along the length direction of the tower head.

[0011] Furthermore, the distance L1 between the upper return side hanging point and the tower head 1 is smaller than the distance L2 between the lower return side hanging point and the tower head 1 .

[0012] Further, the tower head includes an upper crossbeam, a lower crossbeam, an upper return curved arm and a lower return curved arm;

[0013] The upper crossbeam and the lower crossbeam are arranged in parallel and connected by an upper return arm, and the lower crossbeam is connected to the supporting structure by a lower return arm;

[0014] The ground wire bracket and the upper cross arm are both connected to the upper cross beam; the upper return middle phase hanging point is arranged on the upper cross beam;

[0015] The lower cross arm is connected to the lower cross beam; the lower middle phase hanging point is arranged on the lower cross beam;

[0016] There is a distance a between the upper middle phase hanging point and the lower middle phase hanging point along the length direction a of the tower head 1 .

[0017] Furthermore, the ground wire bracket is arranged obliquely, the lower end of the ground wire bracket is connected to the end of the upper crossbeam, and the upper end of the ground wire bracket extends obliquely upward away from the upper crossbeam;

[0018] The ground wire hanging point is arranged at the upper end of the ground wire bracket.

[0019] Furthermore, two upper return curved arms are provided, and the two upper return curved arms are respectively located at two ends of the upper crossbeam in the length direction;

[0020] The two lower return curved arms are provided, and the two lower return curved arms are respectively located at two ends of the lower cross beam in the length direction.

[0021] Furthermore, the supporting structure includes tower legs, and the lower end of the lower curved arm is connected to the tower legs.

[0022] Furthermore, the lower curved arm is a truss structure.

[0023] Furthermore, the tower head, tower legs, ground wire bracket, upper cross arm and lower cross arm are all made of steel.

[0024] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a double-circuit terminal tower for a high-low structure of a power transformation, which solves the problem of difficulty in wiring in the high-low structure, and makes the distance between the upper and lower layers of the conductor within a short distance meet the electrical safety requirements, which facilitates wiring in the high-low structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the utility model;

[0026] Figure markings: 1-tower head; 101-upper crossbeam; 1011-upper middle phase hanging point; 102-lower crossbeam; 1021-lower middle phase hanging point; 103-upper curved arm; 104-lower curved arm; 2-tower leg; 3-ground wire bracket; 301-ground wire hanging point; 4-upper cross arm; 401-upper side phase hanging point; 5-lower cross arm; 501-lower side phase hanging point. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 The utility model is further illustrated with embodiments.

[0028] A double-circuit terminal tower for a high-low structure of a power transformation device comprises a supporting structure, a tower head 1, a ground wire support 3, an upper cross arm 4 and a lower cross arm 5; the tower head 1 is arranged on the supporting structure; the ground wire support 3, the upper cross arm 4 and the lower cross arm 5 are all connected to the tower head 1 and arranged in sequence from top to bottom; two ground wire supports 3 are provided, and the two ground wire supports 3 are respectively located at the two ends of the length direction a of the tower head 1; a ground wire hanging point 301 is provided on the ground wire support 3; two upper cross arms 4 are provided, and the two upper cross arms 4 are respectively located at the two ends of the length direction a of the tower head 1; an upper return side phase hanging point 401 is provided on the upper cross arm 4; an upper return middle phase hanging point 1011 located between the two upper return side phase hanging points 401 is provided on the tower head 1 ; The upper middle phase hanging point 1011 and the two upper side phase hanging points 401 are located on the same vertical plane and form a first reference plane; there are two lower cross arms 5, and the two lower cross arms 5 are respectively located at the two ends of the length direction a of the tower head 1; a lower side phase hanging point 501 is arranged on the lower cross arm 5; there is a spacing along the length direction a of the tower head 1 between the upper side phase hanging point 401 and the lower side phase hanging point 501; a lower middle phase hanging point 1021 located between the two lower side phase hanging points 501 is arranged on the tower head 1; the lower middle phase hanging point 1021 and the two lower side phase hanging points 501 are located on the same vertical plane and form a second reference plane; the first reference plane and the second reference plane have a spacing along the width direction of the tower head 1.

[0029] One of the ground wire supports 3, one of the upper cross arms 4 and one of the lower cross arms 5 are located at one end of the length direction a of the tower head 1. Another ground wire support 3, another upper cross arm 4 and another lower cross arm 5 are located at the other end of the length direction a of the tower head 1. The upper return middle phase hanging point 1011 and the two upper return side phase hanging points 401 serve as the upper return wire hanging points, and the lower return middle phase hanging point 1021 and the two lower return side phase hanging points 501 serve as the lower return wire hanging points. The ground wire hanging point 301, the upper return wire hanging point and the lower return wire hanging point are arranged in sequence from top to bottom. The upper return middle phase hanging point 1011 and the two upper return side phase hanging points 401 are arranged in pairs along the length direction a of the tower head 1, and the lower return middle phase hanging point 1021 and the two lower return side phase hanging points 501 are arranged in pairs along the length direction a of the tower head 1, which should also meet the electrical safety requirements. The distance between the upper return side phase hanging point 401 and the lower return side phase hanging point 501 along the length direction a of the tower head 1 should meet the electrical safety requirements. Preferably, the distance L1 between the upper return side phase hanging point 401 and the tower head 1 is smaller than the distance L2 between the lower return side phase hanging point 501 and the tower head 1, and the difference between L1 and L2 should meet the electrical safety requirements. Through the above arrangement, the distance between the upper and lower layer conductors within a short distance meets the electrical safety requirements, which is convenient for the high and low frame line entry.

[0030] Specifically, the tower head 1 includes an upper crossbeam 101, a lower crossbeam 102, an upper return curved arm 103 and a lower return curved arm 104; the upper crossbeam 101 and the lower crossbeam 102 are arranged in parallel and connected through the upper return curved arm 103, and the lower crossbeam 102 is connected to the supporting structure through the lower return curved arm 104; the ground wire bracket 3 and the upper crossbeam 4 are both connected to the upper crossbeam 101; the upper return middle phase hanging point 1011 is arranged on the upper crossbeam 101; the lower crossbeam 5 is connected to the lower crossbeam 102; the lower return middle phase hanging point 1021 is arranged on the lower crossbeam 102; there is a distance a between the upper return middle phase hanging point 1011 and the lower return middle phase hanging point 1021 along the length direction a of the tower head 1. The distance a between the upper return middle phase hanging point 1011 and the lower return middle phase hanging point 1021 along the length direction a of the tower head 1 should meet the electrical safety requirements. Preferably, the upper end of the upper return curved arm 103 is connected to the upper crossbeam 101 by bolts, and the lower end of the upper return curved arm 103 is also connected to the lower crossbeam 102 by bolts. Specifically, one end of the upper crossarm 4 is connected to the end of the upper crossbeam 101 by bolts, and the other end extends in a direction away from the upper crossbeam 101, and the upper return side hanging point 401 is set at the far end of the upper crossarm 4 away from the upper crossbeam 101; one end of the lower crossarm 5 is connected to the end of the lower crossbeam 102 by bolts, and the other end extends in a direction away from the lower crossbeam 102, and the lower return side hanging point 501 is set at the far end of the lower crossarm 5 away from the lower crossbeam 102.

[0031] Preferably, the ground wire bracket 3 is arranged at an angle, the lower end of the ground wire bracket 3 is connected to the end of the upper beam 101, and the upper end of the ground wire bracket 3 extends obliquely upward away from the upper beam 101; the ground wire hanging point 301 is set at the upper end of the ground wire bracket 3.

[0032] In order to meet the electrical safety requirements, as a further preferred embodiment, there is a distance a between the ground wire hanging point 301 and the upper return phase hanging point 401 along the length direction a of the tower head 1 .

[0033] Preferably, two upper return curved arms 103 are provided, and the two upper return curved arms 103 are respectively located at the two ends of the length direction of the upper beam 101; two lower return curved arms 104 are provided, and the two lower return curved arms 104 are respectively located at the two ends of the length direction of the lower beam 102.

[0034] The supporting structure may only include the tower leg 2 . In this case, the tower head 1 and the tower leg 2 are arranged up and down, and the lower end of the lower return arm 104 is connected to the tower leg 2 .

[0035] Preferably, the lower curved arm 104 is a truss structure.

[0036] The tower head 1, tower legs 2, ground wire bracket 3, upper cross arm 4 and lower cross arm 5 are all made of steel.

[0037] The embodiments of the specific implementation are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. All equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. Double-circuit terminal tower for high-low structure of power transformation, characterized by: It comprises a supporting structure, a tower head (1), a ground wire bracket (3), an upper cross arm (4) and a lower cross arm (5); the tower head (1) is arranged on the supporting structure; the ground wire bracket (3), the upper cross arm (4) and the lower cross arm (5) are all connected to the tower head (1) and arranged in sequence from top to bottom; Two ground wire brackets (3) are provided, and the two ground wire brackets (3) are respectively located at two ends of the tower head (1) in the length direction a; a ground wire hanging point (301) is provided on the ground wire bracket (3); Two upper cross arms (4) are provided, and the two upper cross arms (4) are respectively located at the two ends of the length direction a of the tower head (1); an upper return side hanging point (401) is provided on the upper cross arm (4); an upper return middle hanging point (1011) located between the two upper return side hanging points (401) is provided on the tower head (1); the upper return middle hanging point (1011) and the two upper return side hanging points (401) are located on the same vertical plane and form a first reference plane; Two lower cross arms (5) are provided, and the two lower cross arms (5) are respectively located at the two ends of the length direction a of the tower head (1); a lower return side hanging point (501) is provided on the lower cross arm (5); a spacing is provided between the upper return side hanging point (401) and the lower return side hanging point (501) along the length direction a of the tower head (1); a lower return middle hanging point (1021) located between the two lower return side hanging points (501) is provided on the tower head (1); the lower return middle hanging point (1021) and the two lower return side hanging points (501) are located on the same vertical plane and form a second reference plane; the first reference plane and the second reference plane are spaced apart along the width direction of the tower head (1).

2. The double-circuit terminal tower for a high-low structure of a power transformation as claimed in claim 1, characterized in that: There is a distance a between the ground wire hanging point (301) and the upper return side hanging point (401) along the length direction a of the tower head (1).

3. A double-circuit terminal tower for a high-low structure of a power transformation as claimed in any one of claims 1 to 2, characterized in that: The distance L1 between the upper return side hanging point (401) and the tower head (1) is smaller than the distance L2 between the lower return side hanging point (501) and the tower head (1).

4. The double-circuit terminal tower for a high-low structure of a power transformation as claimed in claim 1, characterized in that: The tower head (1) comprises an upper crossbeam (101), a lower crossbeam (102), an upper return curved arm (103) and a lower return curved arm (104); The upper crossbeam (101) and the lower crossbeam (102) are arranged in parallel and connected via an upper return curved arm (103); the lower crossbeam (102) and the supporting structure are connected via a lower return curved arm (104); The ground wire support (3) and the upper cross arm (4) are both connected to the upper cross beam (101); the upper return middle phase hanging point (1011) is arranged on the upper cross beam (101); The lower cross arm (5) is connected to the lower cross beam (102); the lower middle phase hanging point (1021) is arranged on the lower cross beam (102); There is a distance a between the upper middle phase hanging point (1011) and the lower middle phase hanging point (1021) along the length direction a of the tower head 1.

5. The double-circuit terminal tower for a high-low structure of a power transformation as claimed in claim 4, characterized in that: The ground wire bracket (3) is arranged obliquely, the lower end of the ground wire bracket (3) is connected to the end of the upper crossbeam (101), and the upper end of the ground wire bracket (3) extends obliquely upward away from the upper crossbeam (101); The ground wire hanging point (301) is arranged at the upper end of the ground wire bracket (3).

6. The double-circuit terminal tower for a high-low structure of a power transformation as claimed in claim 4, characterized in that: Two upper return curved arms (103) are provided, and the two upper return curved arms (103) are respectively located at two ends of the upper cross beam (101) in the length direction; Two lower return curved arms (104) are provided, and the two lower return curved arms (104) are respectively located at two ends of the lower cross beam (102) in the length direction.

7. The double-circuit terminal tower for a high-low structure of a power transformation as claimed in claim 4, characterized in that: The supporting structure comprises a tower leg (2), and the lower end of the lower curved arm (104) is connected to the tower leg (2).

8. The double-circuit terminal tower for a high-low structure of a power transformation as claimed in claim 4, characterized in that: The lower curved arm (104) is a truss structure.

9. The double-circuit terminal tower for a high-low structure of a power transformation as claimed in claim 1, characterized in that: The tower head (1), tower legs (2), ground wire bracket (3), upper cross arm (4) and lower cross arm (5) are all made of steel.

Images