Power transmission line tower structure

Abstract

The utility model discloses a power transmission line tower structure which is characterized in that a positioning frame is arranged at the top of a tower base frame, a positioning supporting rod is arranged on the upper portion of the tower base frame through a support and extends upwards to penetrate out of the positioning frame, a limiting frame is arranged at the bottom of a tower body, and the positioning frame is sleeved with the limiting frame in a sliding mode. A guide frame downwards penetrating out of the limiting frame is arranged in the center of the bottom of the tower frame body, the positioning supporting rod is sleeved with the guide frame in a sliding mode, the lifting driving pieces are arranged on the upper portion in the tower base frame through supports, and the top of each lifting driving piece is connected with the upper portion of the limiting frame or the bottom of the tower frame body. A plurality of thread picking frames are arranged on the upper portion of the tower body, and a thread clamping mechanism is arranged at the tail end of each thread picking frame. The height of the power transmission cable from the ground can be adjusted according to different cold and hot seasons, and faults such as short circuit or electric shock risks caused by contact of buildings or tall plants due to overlarge drooping amplitude of the power transmission cable are prevented.

Description

Technical Field

[0001] This utility model belongs to the field of power transmission tower technology, and in particular relates to a power transmission line tower structure. Background Technology

[0002] Currently, long-distance power transmission mainly relies on large metal frame transmission towers to suspend transmission lines. However, it has been found that due to different working environments or abnormal fluctuations in the working environment, the effects of thermal expansion and contraction need to be considered when installing transmission cables. A stretch allowance needs to be reserved for the length of the transmission cable between two towers. After long-term use, the transmission cable may become loose and sag due to the stretch allowance, making it impossible to maintain tension. Therefore, it is necessary to improve the steel structure support of the transmission tower. Utility Model Content

[0003] The present invention provides a transmission line tower structure.

[0004] This utility model is achieved through the following technical solution: It includes a tower, a wire-lifting frame, and a wire-clamping mechanism. Several wire-lifting frames are installed on the upper part of the tower, and a wire-clamping mechanism is installed at the end of each wire-lifting frame. The tower includes a tower base frame, a positioning frame, a positioning support rod, a tower body, a limiting frame, a guide frame, and a lifting drive component. A square columnar positioning frame with a shape matching its top is fixedly installed on the top of the tower base frame. A positioning support rod coinciding with the centerline of the positioning support rod is installed on the upper part of the tower base frame via a bracket. The positioning support rod extends upward through the positioning frame. The tower body... A square columnar limiting frame with a shape matching its bottom is fixedly installed at the bottom. The limiting frame is sleeved on the outside of the positioning frame, and the two are slidably engaged. A guide frame that extends downward through the limiting frame is set at the center of the bottom of the tower body. The guide frame is sleeved on the outside of the positioning support rod, and the guide frame and the positioning support rod are slidably engaged. There are at least four lifting drive components. The lifting drive components are all set in the upper part of the tower base frame through brackets. The top of each lifting drive component is connected to the upper part of the limiting frame or the bottom of the tower body, driving the limiting frame and the tower body to move up and down.

[0005] The beneficial effects of this utility model are: it can adjust the height of the power transmission cable from the ground according to different seasons such as summer and winter, solving the problem of the power transmission cable becoming loose and sagging due to thermal expansion and contraction after long-term use; it also solves the problem that when a large expansion allowance is deliberately reserved for the power transmission cable during installation, the cable may become loose and unable to maintain tension due to the existence of the expansion allowance, thus keeping the power cable taut; and it prevents the power cable from sagging too much and coming into contact with buildings or tall plants, which could lead to short circuits or electric shock risks. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of this utility model;

[0007] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0008] Figure 3 This is a schematic diagram of the tower base structure;

[0009] Figure 4 This is a schematic diagram of the tower structure.

[0010] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of BB;

[0011] The numbers in the diagram are: 1~Tower base frame 1, 2~Positioning frame 2, 3~Positioning support rod 3, 4~Tower body 4, 5~Limiting frame 5, 6~Guide frame 6, 7~Lifting drive component 7, 8~Bracket 8, 9~Reinforcing rod 9, 10~Line lifting frame 10. Detailed Implementation

[0012] To enable those skilled in the art to better understand the technical solution of this utility model, the specific embodiments are described in detail below with reference to the accompanying drawings.

[0013] like Figures 1-5 The transmission line tower structure shown includes a tower, a wire-lifting frame 10, and a wire-clamping mechanism. Since the wire-clamping mechanism is a commonly used overhead line component and is known technology, it will not be described in detail here. Several wire-lifting frames 10 are installed on the upper part of the tower, and a wire-clamping mechanism is installed at the end of each wire-lifting frame 10. The tower includes a tower base frame 1, a positioning frame 2, a positioning support rod 3, a tower body 4, a limiting frame 5, a guide frame 6, and a lifting drive component 7. A square columnar positioning frame 2, matching the shape of its top, is fixedly installed on the top of the tower base frame 1. Cross-shaped supports 8 are respectively installed on the upper part and top of the tower base frame 1. The positioning support rod 3 is suspended at the center of the two supports 8 and coincides with the axis of the tower base frame 1. The positioning support rod 3 extends upward through the positioning frame 2. A square columnar limiting frame 5 with a shape matching its bottom is fixedly installed at the bottom of the tower body 4. The limiting frame 5 is sleeved on the outside of the positioning frame 2 and the two slide together. The positioning frame 2 and the limiting frame 5 are set in a square columnar structure to ensure that the sliding between the two will not interfere with each other and to ensure the strength of the supporting structure. The tower base frame 1 and the tower body 4 are existing known electric tower structures, both of which are composed of four main rods and several diagonal rods connected together.

[0014] A guide frame 6 is provided at the center of the bottom of the tower body 4, extending downward through the limiting frame 5. The guide frame 6 is sleeved on the outside of the positioning support rod 3, and the guide frame 6 and the positioning support rod 3 are slidably engaged. There are at least four lifting drive components 7, which are all located in the upper part of the tower base frame 1 through brackets 8. The brackets 8 have a cross-shaped structure, and each end of the brackets 8 is fixedly connected to each main rod of the tower base frame 1 through a joint. The top of each lifting drive component 7 is connected to the upper part of the limiting frame 5 or the bottom of the tower body 4, driving the limiting frame 5 and the tower body 4 to perform lifting and lowering movements.

[0015] The positioning frame 2 and the limiting frame 5 are respectively configured as truss structures to ensure connection stability and support strength.

[0016] The positioning support rod 3 is configured as a cylindrical or square truss structure, and the guide frame 6 is configured as a cylindrical or square truss structure that matches the external shape of the positioning support rod 3. This ensures connection stability and support strength while allowing the guide frame 6 to slide and rise on the positioning support rod 3.

[0017] The length of the positioning frame 2 is not less than the length of the limiting frame 5.

[0018] The lifting drive component 7 is a hydraulic cylinder, a pneumatic cylinder, or a lead screw mechanism with a motor drive.

[0019] The tower base frame 1 is configured in the shape of a frustum.

[0020] The tower body 4 is a square columnar structure or a frustum-shaped structure.

[0021] The upper middle part of the guide frame 6 is provided with several reinforcing rods 9 that are obliquely upward connected to the bottom of the tower body 4.

[0022] The working principle of this utility model is as follows: During the installation of power lines, the tower body 4 and the limiting frame 5 can be raised or lowered by activating the lifting drive 7 according to the thermal expansion and contraction in winter and summer, thereby adjusting the support height of the tower body 4 and thus adjusting the height of the power transmission cable. Specifically, in summer, when the power transmission cable sags significantly due to thermal expansion, the lifting drive 7 is activated to raise the tower body 4 and the limiting frame 5 to maximize the height of the power transmission cable above the ground, keeping the cable in a stretched state and minimizing the sag. In winter, when the power transmission cable sags less due to thermal contraction, the lifting drive 7 is appropriately lowered to keep the cable in a suitable stretched state, preventing excessive tension on the power transmission cable and thus avoiding excessive pulling force on the two towers, reducing the risk of the tower bending due to heavy load.

Claims

1. A transmission line tower structure, comprising a tower, a wire-lifting frame (10), and a wire-clamping mechanism, wherein a plurality of wire-lifting frames (10) are provided on the upper part of the tower, and a wire-clamping mechanism is provided at the end of each wire-lifting frame (10), characterized in that: The tower includes a tower base frame (1), a positioning frame (2), a positioning support rod (3), a tower body (4), a limiting frame (5), a guide frame (6), and a lifting drive component (7). A positioning frame (2) with a square columnar structure matching its top shape is fixedly installed on the top of the tower base frame (1). A positioning support rod (3) coinciding with the centerline of the positioning support rod (3) is installed on the upper part of the tower base frame (1) via a bracket (8). The positioning support rod (3) extends upward through the positioning frame (2). A limiting frame (5) with a square columnar structure matching its bottom shape is fixedly installed at the bottom of the tower body (4). 5) A guide frame (6) is provided at the bottom center of the tower body (4) and extends downward through the limiting frame (5). The guide frame (6) is sleeved on the outside of the positioning support rod (3) and the guide frame (6) and the positioning support rod (3) are slidably engaged. There are at least four lifting drive components (7). The lifting drive components (7) are all located in the upper part of the tower base frame (1) through the bracket (8). The top of each lifting drive component (7) is connected to the upper part of the limiting frame (5) or the bottom of the tower body (4) to drive the limiting frame (5) and the tower body (4) to perform lifting and lowering movements.

2. The transmission line tower structure according to claim 1, characterized in that: The positioning frame (2) and the limiting frame (5) are respectively arranged in a truss structure.

3. The transmission line tower structure according to claim 1, characterized in that: The positioning support rod (3) is configured as a cylindrical or square truss structure, and the guide frame (6) is configured as a cylindrical or square truss structure that matches the external shape of the positioning support rod (3).

4. The transmission line tower structure according to claim 1, characterized in that: The length of the positioning frame (2) is not less than the length of the limiting frame (5).

5. The transmission line tower structure according to claim 1, characterized in that: The lifting drive component (7) is a hydraulic cylinder, a pneumatic cylinder, or a lead screw mechanism with a motor drive.

6. The transmission line tower structure according to claim 1, characterized in that: The tower base frame (1) is configured in the shape of a frustum.

7. The transmission line tower structure according to claim 1, characterized in that: The tower body (4) is a square columnar structure.

8. The transmission line tower structure according to claim 1, characterized in that: The upper middle part of the guide frame (6) is provided with several reinforcing rods (9) that are obliquely upward connected to the bottom of the tower frame body (4).

Images