A transmission cable bracket that rises and falls with temperature

Abstract

The present invention discloses a power transmission cable support that rises and falls with the temperature, and relates to the field of power transmission. The power transmission cable support comprises a support base, a lifting device, and a cable rack above the lifting device. The lifting device has a cavity, the cavity has a lower bottom, a vertical guide rod is arranged in the cavity, and a lifting rod is sleeved on the outside of the guide rod. The lifting rod can maintain a vertical movement direction under the constraint of the guide rod. The cavity is a variable cross-section cavity, and the diameter of the lower cavity is smaller than the diameter of the upper cavity. When the lifting rod disc is located in the lower cavity, the lifting rod disc, the lower bottom of the cavity, and the side walls of the cavity form a closed air chamber. When the lifting rod disc rises to the upper cavity, the lower bottom of the cavity, the side walls of the cavity, and the airtight disc form a closed air chamber. The lifting rod is moved up and down by utilizing the principle that the volume of gas expands with temperature, thereby causing the cable rack above the lifting device to move up and down, thereby offsetting the change in the sag of the cable to a certain extent.

Description

Technical Field

[0001] The present invention relates to the field of power transmission, and in particular to a power transmission cable support that rises and falls with the temperature. Background Art

[0002] The statements herein merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Power stations are often located far from actual power users, necessitating long-distance transmission of electrical energy. Overhead transmission lines are often used. The overhead section of the cable sags due to gravity, leading to technical standards stipulating the minimum distance the cable must maintain from the ground. This minimum distance varies depending on the transmission environment.

[0004] The amount of cable sag varies due to temperature, with greater sag at high temperatures and less sag at low temperatures. This also results in a difference between the cable's distance from the ground during installation and its subsequent use: if the temperature is high during installation, the sag will decrease when the temperature is low, increasing the cable's distance from the ground, far exceeding the technical standard and causing resource waste. If the temperature is low during installation, the sag will increase when the temperature is high, decreasing the cable's distance from the ground as it increases, creating a safety hazard. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a temperature-dependent transmission cable support. When the temperature is high, the support increases in height, offsetting the increase in cable sag, reducing the range of cable height variation above the ground and eliminating safety hazards.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] The power transmission cable support that rises and falls with the temperature includes: a support base, a lifting device installed above the support base, and a cable rack above the lifting device.

[0008] The lifting device extends a lifting rod upwards to support the cable rack.

[0009] The lifting device has a cavity with a bottom. A vertical guide rod is arranged in the cavity. The guide rod is covered with a lifting rod. The lifting rod can keep moving in a vertical direction under the constraint of the guide rod.

[0010] The cavity is a variable cross-section cavity, and the diameter of the lower cavity is smaller than the diameter of the upper cavity.

[0011] A disc locking piece and an airtight disc are provided at the cross-section changing position of the cavity. The airtight disc is located above the disc locking piece and is fixedly connected to the disc locking piece and can move up and down at the same time.

[0012] The disc locking piece is provided with a locking buckle, which is rotatably connected to the peripheral component. The locking buckle has an inward transverse groove and can be combined and locked with the lifting rod disc buckle.

[0013] The lifting rod disc can naturally move the locking buckle and lock it during the rising process. After locking, the lifting rod disc and the disc locking piece move up and down in the upper cavity together.

[0014] The diameter of the lifting rod disc is the same as the diameter of the cavity below.

[0015] The diameter of the airtight disk is the same as the diameter of the cavity above.

[0016] When the lifting rod disc is located in the lower cavity, the lifting rod disc, the lower bottom of the cavity and the side walls of the cavity form a closed air chamber.

[0017] When the lifting rod disc rises to the upper cavity, the lower bottom of the cavity, the cavity side wall and the airtight disc form a closed air chamber.

[0018] The air chamber is filled with gas, and the volume of the gas changes with the rise and fall of the outside temperature. The change in the volume of the air chamber drives the increase and decrease of the extension length of the lifting rod, thereby adjusting the overall height of the transmission cable to offset the change in its sag.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1) This invention utilizes the principle that gas volume expands and contracts with temperature to move the lifting rod up and down, thereby causing the cable rack above the lifting device to move up and down. This can offset changes in cable sag to a certain extent. This allows the cable to maintain a stable distance from the ground within a small range at different temperatures, preventing resource waste and potential safety hazards.

[0021] 2) The cavity in the present invention is a variable cross-section cavity, so that when the amount of gas filled in the cavity remains unchanged, the cable rack lifting sensitivity at low temperature is greater than that at high temperature, which is beneficial for the transmission cable support to maintain higher strength at low temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 1 is a schematic diagram of the overall structure of a power transmission cable support that rises and falls with temperature according to one or more embodiments of the present invention;

[0024] Figure 2is a schematic diagram of the internal structure of a lifting device according to one or more embodiments of the present invention;

[0025] Figure 3 is a schematic diagram of the internal structure of a lifting device according to one or more embodiments of the present invention;

[0026] Figure 4 yes Figure 3 View from the middle AA direction.

[0027] Among them, 1. bracket base; 2. lifting device; 3. cable rack; 4. lifting rod; 5. insulating connector; 6. guide rod; 7. lower cavity; 8. upper cavity; 9. disc locking part; 10. airtight disk; 11. locking buckle; 12. unlocking protrusion; 13. upper cavity; 14. unlocking contact; 15. lifting rod disc. DETAILED DESCRIPTION

[0028] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0029] Example 1

[0030] In a typical embodiment of the present invention, the power transmission cable support that rises and falls with the temperature is divided into three parts: a support base 1, a lifting device 2 installed above the support base, and a cable rack 3 above the lifting device. Figure 1 shown.

[0031] The support base 1 is used to support the entire structure.

[0032] The lifting device 2 extends a lifting rod 4 upwardly for connecting to the cable rack 3 .

[0033] The cable rack 3 is mounted on the lifting rod 4, and an insulating support is installed on the upper surface. The end of the insulating support away from the cable rack is an insulating connector 5, which is detachably connected to the transmission cable to play the role of supporting the cable.

[0034] like Figure 2 As shown, there is a cavity in the lifting device 2, the cavity has a bottom, and a vertical guide rod 6 is arranged in the cavity. The lifting rod 4 is sleeved on the outside of the guide rod 6. The lifting rod can move up and down in the cavity and maintain the vertical movement direction under the constraint of the guide rod 6.

[0035] Below the lifting rod 4 is a lifting rod disc 15 with a disc structure.

[0036] The cavity is a variable cross-section cavity, and the diameter of the lower cavity 7 is smaller than the diameter of the upper cavity 8.

[0037] A disc locking piece 9 and an airtight disc 10 are provided at the cross-section change position of the cavity. The airtight disc 10 is located above the disc locking piece 9 and is fixedly connected to the disc locking piece 9 and can move up and down at the same time.

[0038] The lifting rod 4 passes through the airtight disk 10 from the center.

[0039] The disc locking member 9 includes a locking buckle 11 , which is rotatably connected to the peripheral components. The locking buckle 11 has an inward transverse groove, which can contact and lock the lifting rod disc 15 .

[0040] The peripheral component includes an unlocking contact 14 , which can release the locking state between the locking buckle 11 and the lifting rod disc 15 after contacting the unlocking protrusion 12 .

[0041] There is an inclined step at the variable cross-section position of the cavity. The disc locking buckle 11 is supported by the elastic device and is close to the inclined step, at a drooping angle. The length of the groove lower plate is smaller than the length of the groove upper plate, and the width between the opened groove lower plates is slightly larger than the diameter of the lifting rod disc 15.

[0042] The lifting rod disc 15 naturally moves the locking buckle 11 during the rising process and locks with it. After that, the lifting rod disc 15 and the disc locking member 9 move up and down in the upper cavity 8. Figure 3 、 Figure 4 shown.

[0043] There is an unlocking protrusion 12 at the variable cross-section position of the cavity. When the lifting rod disc 15 and the locked disc locking piece 9 move downward in the upper cavity and reach the variable cross-section position of the cavity, the unlocking mechanism on the disc locking piece 9 contacts the unlocking protrusion 12 at the variable cross-section position of the cavity, so that the lifting rod disc 15 and the disc locking piece 9 are unlocked during the descending process, and the lifting rod 4 can move to the lower cavity 7 alone. The disc locking piece 9 stays at the variable cross-section position of the cavity, and the disc locking buckle 11 is pressed against the inclined step under the pressure of the elastic component and is at the same drooping angle as before. The relative position relationship of the lifting rod disc 15, the locking buckle 11, and the airtight disc 10 is determined by Figure 3 The status is restored to Figure 2 .

[0044] Preferably, an airtight device is provided at the contact position between the guide rod 6 and the lifting rod disc 15 to prevent the air chamber from communicating with the outside through the opening in the center of the lifting rod disc.

[0045] The diameter of the lifting rod disc 15 is the same as the diameter of the lower cavity 7.

[0046] When the lifting rod disc 15 is located in the lower cavity 7, as shown in FIG. Figure 2The lifting rod disc 15, the bottom of the cavity, and the cavity side wall 12 form a closed air chamber, which is filled with gas. The volume of the gas changes with the rise and fall of the external temperature, and the lifting rod 4 is driven to rise and fall by squeezing the lifting rod disc 15.

[0047] Preferably, the lifting rod disc 15 is made of the same material as the lifting rod 4, which is a rigid material, and the cavity side wall 12 is coated with a polymer material and has a certain elasticity to achieve an airtight effect.

[0048] The diameter of the disc locking member 9 is the same as the diameter of the upper cavity 8 .

[0049] When the gas expands, the lifting rod disc 15 rises to the upper cavity 8, as shown in FIG. Figure 3 The lower bottom of the cavity, the cavity side wall 12, and the airtight disk 10 form a closed air chamber. The volume of the gas in the air chamber changes with the external temperature, driving the lifting rod 4 connected to the airtight disk 10 to move up and down.

[0050] Preferably, the surface of the airtight disk 10 is coated with a polymer material to ensure the airtightness of the central opening of the airtight disk 10 .

[0051] The gas in the cavity is filled into the cavity before installation. During the service process, no matter how the position of the lifting rod disc 15 changes, the amount of gas in the formed air chamber remains unchanged.

[0052] If the temperature is low when the cable is installed, the cable sags less and the extension length of the lifting rod 4 of the transmission cable bracket is also small. When the temperature rises, the cable sags more and the extension length of the lifting rod 4 also increases, raising the overall cable height and preventing the cable from being too close to the ground.

[0053] When the temperature is high in summer or spring and autumn, the lifting rod disc 15 moves within the range of the upper air chamber 8.

[0054] When the temperature is low in winter or spring and autumn, the lifting rod disc 15 moves within the range of the lower air chamber 7.

[0055] Because the diameter of the lower air chamber 7 is smaller than that of the upper air chamber 8, for the same temperature change, the height of the lifting rod 4 changes more significantly at lower temperatures than at higher temperatures. Because the mechanical properties of materials degrade at lower temperatures, as temperatures drop further, such as in winter or spring and autumn, more lifting rods 4 retract into the interior of the lifting device 2, reducing the length of lifting rods 4 exposed to bending moments and mitigating the risk of bracket fracture in windy and snowy weather.

[0056] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A power transmission cable support that rises and falls with the temperature, characterized in that: include: a bracket base, a lifting device installed above the bracket base, and a cable rack above the lifting device; The lifting device extends a lifting rod upward to support the cable rack; The lifting device has a cavity with a bottom, a vertical guide rod in the cavity, and a lifting rod sleeved on the guide rod; The cavity is a variable cross-section cavity, and the diameter of the lower cavity is smaller than the diameter of the upper cavity; A disc locking piece and an airtight disc are provided at the cross-section change position of the cavity, and the airtight disc is located above the disc locking piece and is fixedly connected to the disc locking piece; The lifting rod passes through the airtight disk from the center; the lifting rod disk is located below the lifting rod; the disk locking member includes a locking buckle, which is rotatably connected to the peripheral component and has an inward transverse groove that can be combined with the lifting rod disk buckle for locking; The diameter of the lifting rod disc is the same as the diameter of the cavity below; The diameter of the airtight disk is the same as the diameter of the upper cavity; When the lifting rod disc is located in the lower cavity, the lifting rod disc, the lower bottom of the cavity and the side wall of the cavity form a closed air chamber; When the lifting rod disc rises to the upper cavity, the lower bottom of the cavity, the cavity side wall and the airtight disc form a closed air chamber; The volume of gas in the air chamber can change with the outside temperature, driving the lifting rod to move up and down.

2. The power transmission cable support that rises and falls with the temperature as claimed in claim 1, characterized in that: The support base is used to support the entire structure; The cable rack is mounted on the lifting rod, and an insulating support is installed on the upper surface. The end of the insulating support away from the cable rack is an insulating connector.

3. The power transmission cable support that rises and falls with the temperature as claimed in claim 1, characterized in that: The peripheral component comprises an unlocking contact which can release the locking state between the locking buckle and the lifting rod disc after contacting the unlocking protrusion.

4. The power transmission cable support that rises and falls with the temperature as claimed in claim 1, characterized in that: The variable cross-section position of the cavity is provided with an inclined step so that the locking buckle is at a drooping angle.

5. The power transmission cable support that rises and falls with the temperature as claimed in claim 4, characterized in that: The length of the groove lower plate is smaller than the length of the groove upper plate, and the width between the drooping groove lower plates is larger than the diameter of the lifting rod disc.

6. The power transmission cable support that rises and falls with the temperature as claimed in claim 1, characterized in that: The gas in the cavity is filled into the cavity before installation. During the service process, no matter how the position of the lifting rod disc changes, the amount of gas in the formed air chamber remains unchanged.

7. The power transmission cable support that rises and falls with the temperature as claimed in claim 1, characterized in that: The lifting rod disc is made of the same rigid material as the lifting rod, and the side wall of the cavity is coated with a polymer material, which has a certain elasticity to achieve an airtight effect; The surface of the airtight disk is coated with polymer material to ensure the airtightness of the central opening of the airtight disk.

8. The power transmission cable support that rises and falls with the temperature as claimed in claim 1, characterized in that: The contact position between the guide rod and the lifting rod is provided with an airtight device.

9. The power transmission cable support that rises and falls with the temperature as claimed in claim 1, characterized in that: In summer, the lifting rod disc moves within the range of the upper air chamber; When it is winter, the lifting rod disc moves within the range of the lower air chamber.

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