High-strength cross arm structure of electric tower cross arm

Abstract

The invention discloses a high-strength cross arm structure of an electric tower cross arm, and relates to the technical field of electric towers, the high-strength cross arm structure specifically comprises a cross arm body, mounting holes are formed in the cross arm body, reinforcing rib plates are arranged at the bottoms of the mounting holes, a protection structure is arranged between every two adjacent mounting holes, and each protection structure comprises a connecting cylinder; a through hole matched with the cross arm body is formed in the connecting cylinder, soot blowing plates matched with the cross arm body are arranged at the two ends of the through hole, and airflow discharging grooves are formed between the soot blowing plates and the cross arm body. According to the high-strength cross arm structure of the electric tower cross arm, the protection structure is driven by wind power to rotate, the problem that birds nest or stay on the protection structure is solved, then the probability that bird droppings are left on the cross arm structure can be reduced, the bird repelling range of the protection structure can be expanded through the reflective strips, the cross arm structure is prevented from being corroded by the bird droppings, and the service life is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of electric tower frames, and particularly to a high-strength cross-arm structure for a cross arm of an electric tower frame. Background Art

[0002] Electric tower frames belong to amorphous products of high-rise steel structures. According to different engineering conditions, designers can design the tower frame structure according to requirements. Electric tower frames have a wide range of uses. The cross arm is an important part of the electric tower frame. It is an angle iron fixed horizontally at the top of the electric tower frame and is used to install insulators and metals to support conductors and lightning conductors and keep a certain safe distance according to regulations.

[0003] In the related art, when the cross arm of an electric tower frame is in use, installation holes are generally opened on the cross arm for the installation of structures such as insulators. However, after opening holes on the cross arm, stress concentration will occur, making the cross arm prone to cracking and reducing the strength of the cross arm; the cross arm is relatively flat, which is likely to attract birds to build nests or stay on it, and the bird droppings left by the birds will corrode the cross arm, reducing the strength of the cross arm. Moreover, rain, snow, dust, etc. are also likely to accumulate irregularly on the cross arm, affecting the uniform stress of the cross arm and further reducing the service strength of the cross arm. Based on this, the present application proposes a high-strength cross-arm structure for a cross arm of an electric tower frame. Summary of the Invention

[0004] The present invention provides a high-strength cross-arm structure for a cross arm of an electric tower frame, which solves the problems raised in the above background art that opening installation holes on the cross arm will cause stress concentration and reduce the strength of the cross arm; the cross arm is relatively flat, and bird droppings, rain, snow, etc. are easily accumulated on the cross arm, corroding the cross arm, affecting the uniform stress of the cross arm, and further reducing the service strength of the cross arm.

[0005] The present invention provides the following technical solution: A high-strength cross-arm structure for a cross arm of an electric tower frame, including a cross-arm body. Installation holes are opened on the cross-arm body. Reinforcing rib plates are arranged at the bottoms of the installation holes. A protective structure is provided between two adjacent installation holes. The protective structure includes a connecting cylinder. A through hole adapted to the cross-arm body is provided on the connecting cylinder. Blowing plates adapted to the cross-arm body are provided at both ends of the through hole, and an air flow discharge groove is formed between the blowing plates and the cross-arm body. The outer ring of the connecting cylinder is movably connected with a rotating cylinder, and blades are uniformly fixedly connected to the outer side wall of the rotating cylinder.

[0006] A power chamber is provided on the connecting cylinder. In the middle of one side of the power chamber, an airbag is fixedly connected. The inner cavity of the airbag is connected to the inner cavity of the ash blowing plate wall through a pipeline. The other end of the power chamber is movably connected with a first extrusion rod and a second extrusion rod. One ends of both the first extrusion rod and the second extrusion rod are in contact with the airbag. Both the first extrusion rod and the second extrusion rod are connected to the connecting cylinder through torsion springs. The inner wall of the rotating cylinder is uniformly fixedly connected with pushing strips, and the pushing strips are movably connected with the power chamber. The other ends of both the first extrusion rod and the second extrusion rod are located within the rotation plane of the pushing strips.

[0007] Preferably, rounded corners are provided at the turning points of the hole profile of the mounting hole and the turning points of the profile of the reinforcing rib plate.

[0008] Preferably, the blades are smoothly transitioned with the outer side wall of the rotating cylinder, and a reflective strip is provided on one side of the blades.

[0009] Preferably, the airbag is located between the first extrusion rod and the second extrusion rod. The rotation direction of the first extrusion rod is the same as that of the second extrusion rod. Buffer pads are provided at the ends of both the first extrusion rod and the second extrusion rod away from the airbag.

[0010] Preferably, a positioning rod is movably connected within the inner cavity of the power chamber. Torsion springs are fixedly connected to both ends of the positioning rod, and the other ends of the torsion springs are fixedly connected to the connecting cylinder. The positioning rod is connected to the first extrusion rod or the second extrusion rod.

[0011] Preferably, sound-absorbing plates are provided on the inner side wall of the ash blowing plate and the end of the connecting cylinder, and the pipeline passes through the sound-absorbing plates.

[0012] Preferably, a self-lubricating structure is provided between the rotating cylinder and the connecting cylinder.

[0013] Preferably, a dust filter screen is provided on the inner side wall of the ash blowing plate, and protective coatings are provided on the outer surfaces of both the rotating cylinder and the cross-arm body.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. For the high-strength cross-arm structure of the electric tower cross-arm, by optimizing the mounting holes, stress concentration at the mounting holes is avoided, stress distribution is made uniform, and the structural strength and stiffness at the mounting holes are improved by using reinforcing rib plates, thereby improving the strength of the cross-arm structure and facilitating the application of this cross-arm structure in the electric tower cross-arm.

[0016] 2. The high-strength cross-arm structure of the electric tower cross-arm uses wind power to drive the protective structure to rotate, solving the problem of birds building nests or staying on it. Furthermore, it can reduce the probability of bird droppings remaining on the cross-arm structure. The use of reflective strips can expand the bird repelling range of the protective structure, further reducing the probability of bird droppings remaining on the cross-arm structure, and can prevent birds from leaving droppings on other parts of the cross-arm structure, avoiding the corrosion of the cross-arm structure by bird droppings and extending its service life.

[0017] 3. The high-strength cross-arm structure of the electric tower cross-arm is provided with a dust blowing structure. The dust blowing structure is used to blow away the dust, rain and snow that fall on the cross-arm structure, preventing the accumulation of dust, rain and snow on the cross-arm structure and avoiding the destruction of the stress balance of the cross-arm structure by dust, rain and snow. Furthermore, it can improve the strength of the cross-arm structure, and the wind power can be used as the power source of the dust blowing structure, so that the dust blowing structure does not need to be provided with an additional power source, making it easy to use the cross-arm structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front view schematic diagram of the structure of the present invention;

[0019] Figure 2 is a bottom view schematic diagram of the structure of the present invention;

[0020] Figure 3 is a front elevation schematic diagram of the structure of the present invention;

[0021] Figure 4 is a schematic diagram of the protective structure of the present invention;

[0022] Figure 5 is a schematic sectional view of the protective structure of the present invention;

[0023] Figure 6 is the structure of the present invention Figure 5 explosion schematic diagram;

[0024] Figure 7 is a schematic diagram of the position between the push bar and the first and second extrusion rods of the present invention;

[0025] Figure 8 is a schematic diagram of the connection between the airbag and the dust blowing plate of the present invention through a pipeline.

[0026] In the figure: 1. Cross-arm body; 2. Mounting hole; 3. Connecting cylinder; 4. Rotating cylinder; 5. Blade; 6. Reflective strip; 7. Reinforcing rib plate; 8. Dust blowing plate; 9. Airbag; 10. First extrusion rod; 11. Second extrusion rod; 12. Positioning rod; 13. Torsion spring; 14. Push bar; 15. Power cavity; 16. Air flow discharge groove; 17. Sound-absorbing plate; 18. Pipeline. DETAILED DESCRIPTION OF THE INVENTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] The present invention provides a high-strength cross-arm structure for an electric tower cross arm, including a cross-arm body. An installation hole 2 is provided on the cross-arm body 1. Aiming at the problem that the cross-arm structure is likely to affect the structural strength due to stress concentration, accumulation of bird droppings and dust, this solution optimizes the cross-arm structure from three aspects to enhance the structural strength of the cross-arm.

[0029] Embodiment 1

[0030] By optimizing the cross-arm body 1, the stress distribution of the cross-arm body 1 during use is made uniform, stress concentration is avoided, and the structural strength at the opening of the cross-arm body 1 is increased, further improving the strength of the cross-arm structure, as Figure 1 and Figure 2 shown. A fillet is provided at the turning point of the hole profile of the installation hole 2. The fillet is used to make the stress distribution of the cross-arm body 1 during use more uniform and reduce the stress concentration of the installation hole 2. A reinforcing rib plate 7 is provided at the bottom of the installation hole 2. The reinforcing rib plate 7 can be used to improve the strength and stiffness at the installation hole 2, and further improve the strength of the cross-arm structure. A fillet is also provided at the turning point of the profile of the reinforcing rib plate 7, so that the stress is evenly distributed at the reinforcing rib plate 7 and stress concentration is avoided.

[0031] Embodiment 2

[0032] By protecting the flat part between the two installation holes 2 in the cross-arm structure, the accumulation and corrosion of sundries such as bird droppings in this part of the cross-arm structure are avoided, as Figure 1 and Figure 2 shown.

[0033] A protective structure is provided on the cross-arm body 1. The protective structure is arranged between two adjacent mounting holes 2. By using the protective structure to wrap the flat part of the cross-arm structure, the mechanical strength of the cross-arm structure is improved. The protective structure includes a connecting cylinder 3. A through hole adapted to the cross-arm body 1 is provided on the connecting cylinder 3, and the cross-arm body 1 is installed in the through hole. A rotating cylinder 4 is movably connected to the outer circle of the connecting cylinder 3. Blades 5 are evenly and fixedly connected to the outer side wall of the rotating cylinder 4. Under the action of wind, the wind can blow the blades 5 to rotate, and the blades 5 drive the rotating cylinder 4 to rotate, thus solving the problem of birds building nests or staying on it, and further reducing the probability of bird droppings remaining on the cross-arm structure. To further improve the effect of the protective structure, a reflective strip 6 is provided on one side of the blade 5. By using the reflective strip 6, the bird repelling range of the protective structure can be expanded, further reducing the probability of bird droppings remaining on the cross-arm structure, and preventing birds from leaving droppings on other parts of the cross-arm structure.

[0034] Moreover, the blades 5 and the outer side wall of the rotating cylinder 4 have a smooth transition, so that the stress distribution at the connection part of the blades 5 and the rotating cylinder 4 is uniform, avoiding stress concentration.

[0035] In addition, to reduce the friction between the rotating cylinder 4 and the connecting cylinder 3, a self-lubricating structure is provided between the rotating cylinder 4 and the connecting cylinder 3. The self-lubricating structure can be a solid lubricant. The self-lubricating structure can be arranged on the inner wall of the rotating cylinder 4, and the rotating cylinder 4 is made of a high thermal conductivity material, such as aluminum alloy, to reduce the melting speed of the self-lubricating structure and extend the service life of the self-lubricating structure.

[0036] Embodiment 3

[0037] To address the problem of dust, rain, and snow accumulating on the cross-arm structure, a dust blowing structure is designed in this solution. By using the dust blowing structure, the dust, rain, and snow falling on the cross-arm structure can be blown away, preventing the accumulation of dust, rain, and snow on the cross-arm structure and avoiding the destruction of the force balance of the cross-arm structure by dust, rain, and snow. As Figures 1 to 8 shown.

[0038] The connecting cylinder 3 is provided with a power chamber 15. In the middle of one side of the power chamber 15, an airbag 9 is fixedly connected. At both ends of the through hole, there are dust blowing plates 8 adapted to the cross-arm body 1, and an air flow discharge groove 16 is formed between the dust blowing plate 8 and the cross-arm body 1. The inner cavity of the airbag 9 is connected to the inner cavity of the wall of the dust blowing plate 8 through a pipeline 18. When the airbag 9 is squeezed, the gas in the airbag 9 can enter the inner cavity of the dust blowing plate 8 through the pipeline 18. The gas in the dust blowing plate 8 enters the air flow discharge groove 16 through the spray holes opened on its inner side wall. The air flow ejected from the air flow discharge groove 16 can blow off the sundries such as dust, rain and snow accumulated on the cross-arm body 1. When the restriction on the airbag 9 is released, the resilience of the airbag 9 enables the airbag 9 to return to its original state, and the outside air can flow back into the airbag 9 through the dust blowing plate 8 and the pipeline 18. And a dust filter screen is arranged on the inner side wall of the dust blowing plate 8 to prevent dust from entering the airbag 9.

[0039] Since the sizes of the air flow discharge groove 16 and the spray holes are small, noise is easily generated when the air flow is ejected. In this scheme, sound-absorbing plates 17 are arranged on the inner side wall of the dust blowing plate 8 and the end of the connecting cylinder 3 to reduce the noise generated when the cross-arm structure is used, and the pipeline 18 passes through the sound-absorbing plate 17.

[0040] At the other end of the power chamber 15, a first extrusion rod 10 and a second extrusion rod 11 are movably connected. A positioning rod 12 is movably connected in the inner cavity of the power chamber 15. At both ends of the positioning rod 12, torsion springs 13 are fixedly connected, and the other ends of the torsion springs 13 are fixedly connected to the connecting cylinder 3. The positioning rod 12 is connected to the first extrusion rod 10 or the second extrusion rod 11. One ends of both the first extrusion rod 10 and the second extrusion rod 11 are in contact with the airbag 9, and the airbag 9 is located between the first extrusion rod 10 and the second extrusion rod 11. The rotation direction of the first extrusion rod 10 is the same as that of the second extrusion rod 11. The inner wall of the rotating cylinder 4 is uniformly fixedly connected with pushing strips 14, and the pushing strips 14 are movably connected to the power chamber 15. The other ends of both the first extrusion rod 10 and the second extrusion rod 11 are located in the rotation plane of the pushing strips 14. That is, when the rotating cylinder 4 drives the pushing strips 14 to rotate, the pushing strips 14 can extrude the first extrusion rod 10 and the second extrusion rod 11, so that the other end of the first extrusion rod 10 or the other end of the second extrusion rod 11 can extrude the airbag 9. At the same time, the first extrusion rod 10 and the second extrusion rod 11 perform circular motion with the positioning rod 12 as the center. The pushing strips 14 can be staggered from the first extrusion rod 10 and the second extrusion rod 11. When the first extrusion rod 10 and the second extrusion rod 11 are staggered from the pushing strips 14, under the action of the resilience of the torsion spring 13, the first extrusion rod 10 or the second extrusion rod 11 can be reset.

[0041] Through the above description, wind power can be used as the power source of the dust blowing structure, so that the dust blowing structure does not need to be provided with another power source, which is convenient for the use of the cross-arm structure.

[0042] The outer surfaces of both the rotating cylinder 4 and the cross-arm body 1 are provided with a protective coating, which can be an anti-sticking coating, facilitating the cleaning of dust, rain and snow.

[0043] In summary: When the high-strength cross-arm structure of the electric tower cross-arm is in use, the mounting holes 2 are optimized to avoid stress concentration at the mounting holes 2, making the stress distribution uniform, and the reinforcing rib plates 7 are used to improve the structural strength and stiffness at the mounting holes 2, thereby enhancing the strength of the cross-arm structure and facilitating the application of this cross-arm structure in the electric tower cross-arm.

[0044] This cross-arm structure uses a protective structure to drive away birds, preventing birds from staying on this cross-arm structure and reducing the probability of this cross-arm structure being corroded by bird droppings. Moreover, the protective structure can serve as the power source for the dust-blowing structure. The wind drives the rotation of the rotating cylinder 4, the rotating cylinder 4 drives the rotation of the push bar 14, and the push bar 14 drives the first extrusion rod 10 or the second extrusion rod 11 to extrude the airbag 9. The gas in the airbag 9 enters the air flow discharge groove 16 through the pipeline 18 and the dust-blowing plate 8, and is sprayed onto the cross-arm structure through the air flow discharge groove 16 to clean the cross-arm structure of dust and remove rain and snow, avoiding dust, rain and snow from damaging the force balance of the cross-arm structure, thereby enhancing the strength of the cross-arm structure.

[0045] The standard parts used in the present invention can all be purchased from the market. The special-shaped parts can be customized according to the descriptions in the specification and the drawings. The specific connection methods of each part all adopt conventional means such as bolts that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, which will not be elaborated here. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-strength cross-arm structure for a cross arm of an electric tower, comprising a cross-arm body (1), characterized in that: The cross-arm body (1) is provided with mounting holes (2). A reinforcing rib plate (7) is arranged at the bottom of the mounting hole (2). A protective structure is arranged between two adjacent mounting holes (2). The protective structure includes a connecting cylinder (3). The connecting cylinder (3) is provided with a through hole adapted to the cross-arm body (1). Blowing plates (8) adapted to the cross-arm body (1) are arranged at both ends of the through hole. An air flow discharge groove (16) is formed between the blowing plate (8) and the cross-arm body (1). The outer ring of the connecting cylinder (3) is movably connected with a rotating cylinder (4). Blade (5) are evenly fixedly connected to the outer side wall of the rotating cylinder (4); A power cavity (15) is arranged on the connecting cylinder (3). An air bag (9) is fixedly connected to the middle of one side of the power cavity (15). The inner cavity of the air bag (9) is connected with the inner cavity of the wall of the blowing plate (8) through a pipeline (18). The other end of the power cavity (15) is movably connected with a first extrusion rod (10) and a second extrusion rod (11). One ends of both the first extrusion rod (10) and the second extrusion rod (11) are attached to the air bag (9). Both the first extrusion rod (10) and the second extrusion rod (11) are connected to the connecting cylinder (3) through torsion springs (13). Push strips (14) are evenly fixedly connected to the inner wall of the rotating cylinder (4). The push strips (14) are movably connected with the power cavity (15). The other ends of both the first extrusion rod (10) and the second extrusion rod (11) are located within the rotation plane of the push strips (14).

2. The high-strength cross-arm structure of the cross arm of an electric tower according to claim 1, characterized in that: Round corners are arranged at the turning points of the hole contour of the mounting hole (2) and the turning points of the contour of the reinforcing rib plate (7).

3. The high-strength cross-arm structure of the cross arm of an electric pylon according to claim 1, characterized in that: The blade (5) and the outer side wall of the rotating cylinder (4) are in smooth transition. A reflective strip (6) is arranged on one side of the blade (5).

4. The high-strength cross-arm structure of a cross arm of an electric tower according to claim 1, characterized in that: The air bag (9) is located between the first extrusion rod (10) and the second extrusion rod (11). The rotation direction of the first extrusion rod (10) is the same as that of the second extrusion rod (11). Buffer pads are arranged at the ends of both the first extrusion rod (10) and the second extrusion rod (11) away from the air bag (9).

5. The high-strength cross-arm structure of the cross arm of an electric tower according to claim 1, characterized in that: A positioning rod (12) is movably connected to the inner cavity of the power cavity (15). Torsion springs (13) are fixedly connected to both ends of the positioning rod (12). The other ends of the torsion springs (13) are fixedly connected to the connecting cylinder (3). The positioning rod (12) is connected to the first extrusion rod (10) or the second extrusion rod (11).

6. The high-strength cross-arm structure of a cross arm of an electric tower according to claim 1, characterized in that: Sound-absorbing plates (17) are arranged on the inner side wall of the blowing plate (8) and the end of the connecting cylinder (3). The pipeline (18) passes through the sound-absorbing plate (17).

7. The high-strength cross-arm structure of the cross arm of an electric tower according to claim 1, characterized in that: A self-lubricating structure is arranged between the rotating cylinder (4) and the connecting cylinder (3).

8. The high-strength cross-arm structure of the cross arm of an electric tower according to claim 1, characterized in that: A dust filter screen is arranged on the inner side wall of the blowing plate (8). Protective coatings are arranged on the outer surfaces of both the rotating cylinder (4) and the cross-arm body (1).

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