Composite material assembled pole tower

Abstract

The present invention relates to a power transmission device, a composite material assembled pole tower, which comprises at least two main pipes made of composite materials. The main pipes are circular pipes, and the outer main pipe is sleeved on the inner main pipe. The length of the outer main pipe is greater than that of the inner main pipe, and there is a gap between the outer main pipe and the inner main pipe. A gap support structure for strengthening the mechanical properties of the main pipe is provided at the gap. This assembled pole can be formed by assembling multiple main pipes. By arranging a gap support structure between the multiple main pipes, the main pipes can support each other, improving the mechanical properties of the assembled pole and preventing its height from being limited by the mechanical properties of the pole body.

Description

Technical Field

[0001] The present invention relates to a power transmission device, in particular to a assembled rod-shaped structure. Background Art

[0002] A power pole is a pole for supporting electric wires. Its material has evolved from wood to reinforced concrete. As the name implies, a power pole is a pole for supporting electric wires. It is applicable to the high- and low-voltage power transformation of urban and rural power grids and the erection of various power overhead lines and communication cables, and is one of the important infrastructure for power supply and communication. There are many applications in power systems, communication systems, railway systems, national defense equipment, etc. that use poles as devices for transmitting current and information. The materials used have evolved from wood to reinforced concrete and steel structures. It plays a very important role in the national economy. With the progress of the times, the trend of new materials replacing the above three materials is developing day by day. Polyurethane is currently one of the best materials for these towers. The finished products made of it have the advantages of light weight, high strength, simple structure, good insulation performance, environmental protection and energy saving, low transportation cost, fast installation, convenient maintenance, etc. However, from the perspectives of material properties, functional structures, and manufacturing processes, there is still a lot of room for development that needs to be continuously explored and studied by humans. The present invention is based on this to establish a brand-new structural design to enable composite materials to give full play to their advanced functions as soon as possible.

[0003] In the prior art, some European and American devices use composite materials to make assembled power poles. Specifically, such power poles are assembled from multiple tubular bodies. The cross-section of the tubular body is circular, the top opening is a circular shape with a smaller diameter, and the bottom opening is a circular shape with a larger diameter. The multiple assembled tubes are spliced one by one from top to bottom, that is, the top of the lower splicing tube is inserted into the bottom of the upper splicing tube, so that the splicing tubes are combined into a straight rod shape. Due to the limitations of the diameter and wall thickness of such power poles, the height after combination cannot be too high, otherwise the mechanical properties of the middle section or the top section will be insufficient.

[0004] In the prior art, there are two types of tapered tubular towers made of composite materials. Method 1 takes the products of RS Company in Canada as an example: The products they produce are wound with a certain taper and a certain thickness, and the height and strength of the pole tower are achieved by sleeving from small to large. First, due to the requirement of vertical load, the socket joint between the upper and lower poles is a surface contact, so high processing accuracy is required. In addition, the outer diameter of the lower pole at the joint is smaller than that of the upper pole, which forms a weak link in the horizontal force of the whole pole. Second, due to the requirement of horizontal force, the wall thickness of the upper and lower poles is increased, and this socket joint method cannot be realized because it affects the socket depth. The solution is to change the mold or change to a larger pole section. This greatly increases the investment. To solve the above defects, Method 2 adopts the way of the invention patent "Pole Tower Composed of Multilayer Rod Assemblies" (Patent No. 2010105351519). This method not only solves the joint method problem of Canadian products, but more importantly, it solves the problem of multiple combinations of a set of molds, greatly reducing the production cost. However, this winding method still has certain difficulty problems, such as large production and processing difficulty, high process requirements, difficult standardization forming, poor consistency of product performance, and high cost. Summary of the Invention

[0005] To solve the above problems, the present invention provides a composite material assembled pole tower, which can be spliced without length limitation according to actual conditions and will not be limited by mechanical properties.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] The composite material assembled pole tower includes at least two main pipes made of composite materials, and the outer main pipe is sleeved on the inner main pipe. The length of the inner main pipe is greater than that of the outer main pipe, and there is a gap between the outer main pipe and the inner main pipe; at the gap, there is a gap support structure for strengthening the mechanical properties of the main pipe.

[0008] Preferably, the gap support structure includes a plurality of round pipes, and the outer diameter of the round pipe is half of the difference between the inner diameter of the outer main pipe and the outer diameter of the inner main pipe.

[0009] Preferably, the round pipes fill the space between the outer main pipe and the inner main pipe.

[0010] Preferably, the gap support structure is a plurality of straight pipes with a fan-shaped cross-section. The fan-shaped straight pipe includes a first arc wall that fits the inner wall of the outer main pipe, a second arc wall that fits the outer wall of the inner main pipe, and two support walls that connect and support the first arc wall and the second arc wall.

[0011] Preferably, the gap support structure is composed of multiple profiles with a "work" - shaped cross - section. The profile includes a first arc - shaped wall that fits against the inner wall of the outer main body tube, a second arc - shaped wall that fits against the outer wall of the inner main body tube, and a support wall that connects and supports the mid - points of the first arc - shaped wall and the second arc - shaped wall.

[0012] Preferably, the first walls of multiple said gap support structures enclose a circular - tubular cross - section, and the outer surface of the first wall fits against the inner wall of the outer main body tube.

[0013] Preferably, the second walls of multiple said gap support structures enclose a circular - tubular cross - section, and the inner surface of the second wall fits against the outer wall of the inner main body tube.

[0014] Preferably, there are multiple support inner tubes in the cavity enclosed by the inner wall of the inner main body tube for enhancing the mechanical properties of the inner main body tube.

[0015] Preferably, the support inner tube includes an arc - shaped wall and an abutting structure. When multiple support inner tubes are inserted into the inner main body tube, the abutting structures abut against each other, and the arc - shaped walls combine to form a support surface that abuts against the inner main body tube.

[0016] Preferably, the inner main body tube and / or the outer main body tube is a structure of splicing with abutting in the same layer.

[0017] Preferably, the splicing end faces of the gap support structure, the inner main body tube and / or the outer main body tube are staggered with each other.

[0018] The beneficial effects of using the present invention are as follows:

[0019] This assembled rod can be formed by splicing multiple main body tubes. A gap support structure is arranged between the multiple main body tubes, enabling the main body tubes to support each other, improving the mechanical properties of the assembled rod, and not restricting its height due to the mechanical properties of the rod body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the composite material prefabricated pole tower of the present invention.

[0021] Figure 2 It is a cross - sectional view of the composite material prefabricated pole tower of the present invention along the Figure 1 A - A cross - section in

[0022] Figure 3 It is a cross - sectional view of another embodiment of the composite material prefabricated pole tower of the present invention along the Figure 1 A - A cross - section in

[0023] Figure 4 It is a longitudinal cross - sectional view of the inner main body tube of the composite material prefabricated pole tower of the present invention.

[0024] Figure 5 This is a schematic cross-sectional view of the inner main pipe of the composite material assembled tower pole of the present invention. Detailed implementation manners

[0025] The present invention will be described in detail below with reference to the accompanying drawings.

[0026] As Figures 1-5 shown, this embodiment provides a composite material assembled tower pole, including at least two main pipes made of composite materials. The main pipes are circular pipes, and the outer main pipe is sleeved on the inner main pipe. The length of the outer main pipe is greater than that of the inner main pipe, and there is a gap between the outer main pipe and the inner main pipe; a gap support structure 600 for strengthening the mechanical properties of the main pipe is provided at the gap.

[0027] Taking 5 main pipes as an example in this embodiment, the structure between the main pipes, the use principle and the use process will be described in detail. Specifically, as Figure 1 shown, this assembled pole is composed of a first layer pipe 100, a second layer pipe 200, a third layer pipe 300, a fourth layer pipe 400 and a fifth layer pipe 500 which are sleeved on each other, and its specific shape is as seen in the cross-sectional view in Figure 2 . In this embodiment, the assembled pole is used to support the cables of the power line. The bottoms of the first layer pipe 100, the second layer pipe 200, the third layer pipe 300, the fourth layer pipe 400 and the fifth layer pipe 500 are located on the bottom surface. The lengths of the first layer pipe 100, the second layer pipe 200, the third layer pipe 300, the fourth layer pipe 400 and the fifth layer pipe 500 gradually increase, so that this assembled pole forms a tower structure. For example, if the overall length of this assembled pole is 10 meters, the first layer pipe 100, the second layer pipe 200, the third layer pipe 300, the fourth layer pipe 400 and the fifth layer pipe 500 are 6 meters, 7 meters, 8 meters, 9 meters and 10 meters respectively. The function of the gap support structure 600 is to support adjacent two main pipes, so that the anti-bending ability of the main pipes is enhanced. By arranging the gap support structure 600 between multiple main pipes, the main pipes can support each other, improving the mechanical properties of the assembled pole, and the height of the pole will not be limited by the mechanical properties of the pole body.

[0028] As Figure 2 shown, the gap support structure 600 includes a plurality of circular pipes, and the outer diameter of the circular pipe is half of the difference between the inner diameter of the outer main pipe and the outer diameter of the inner main pipe. The circular pipes fill the space between the outer main pipe and the inner main pipe. Taking the gap support structure 600 between the first layer pipe 100 and the second layer pipe 200 as an example, the gap support structure 600 can be just inserted into the space between the first layer pipe 100 and the second layer pipe 200 at intervals. Another advantage is that for this kind of circular pipe gap support structure 600, the diameters are all the same, and they can be replaced with each other. There is no need to make multiple molds for straight pipes with different pipe diameters, which reduces the cost and has strong replaceability. AsFigure 2 As shown, after the interstitial support structures 600 of the straight tubes are filled between the main body tubes, the mechanical structure is formed to be the sum of the multiple main body tubes and the interstitial support structures 600. At the same time, the triangular area formed between the main body tubes and the interstitial support structures 600 can provide additional support while maintaining the advantage of low weight. In this embodiment, the round tubes are squeezed between the outer and inner main body tubes, which provides better support in the radial direction between the outer and inner main body tubes.

[0029] The gap support structures 600 between the second tube 200 and the third tube 300, the third tube 300 and the fourth tube 400, and the fourth tube 400 and the fifth tube 500 are similar to the gap support structures 600 between the first tube 100 and the second tube, and are not described again.

[0030] like Figure 3 As shown, in another embodiment, the gap support structure 600 is a plurality of straight tubes with a fan-shaped cross-section. The fan-shaped straight tubes include a first curved wall that mates with the inner wall of the outer main tube, a second curved wall that mates with the outer wall of the inner main tube, and two supporting walls that connect and support the first curved wall and the second curved wall. The gap support structure 600 in this embodiment is different in shape from the gap support structure 600 in the previous embodiment. The supporting walls of two adjacent gap support structures 600 abut against each other to form a stable structure.

[0031] In a third embodiment, the gap support structure 600 comprises multiple I-shaped cross-sections. These cross-sections include a first curved wall that mates with the inner wall of the outer main tube, a second curved wall that mates with the outer wall of the inner main tube, and a supporting wall connecting and supporting the midpoints of the first and second curved walls. In this configuration, adjacent gap support structures 600 form a stable structure by abutting the ends of adjacent first and second curved walls. This embodiment also provides strong support.

[0032] The first walls of the multiple gap support structures 600 enclose a circular tubular cross-section, and the outer surface of the first wall conforms to the inner wall of the outer main tube. The second walls of the multiple gap support structures 600 enclose a circular tubular cross-section, and the inner surface of the second wall conforms to the outer wall of the inner main tube. In the above embodiment, when the gap support structure 600 has a first wall and a second arm, the first wall and the second arm combine to form a cylindrical shape that matches the abutment surface of the main tube, which has a stronger ability to conform to the main tube and provides greater support force.

[0033] like Figure 4 、 Figure 5As shown in the figure, there are multiple support inner tubes 510 in the cavity enclosed by the inner wall of the inner main body tube, which are used to improve the mechanical properties of the inner main body tube. The support inner tube 510 includes an arc-shaped wall and an abutting structure. When multiple support inner tubes 510 are inserted into the inner part of the inner main body tube, the abutting structures abut against each other, and the arc-shaped walls combine to form a support surface that abuts against the inner main body tube.

[0034] In this embodiment, the cross-section of the support inner tube 510 forms a shape similar to an evenly divided pizza after assembly, and the outer surface of its arc-shaped wall abuts against the inner wall of the arc-shaped wall of the inner main body tube. In this embodiment, the support inner tube 510 is installed inside the fifth layer tube 500. The straight walls of its support inner tube 510 abut against each other to form a force transmission structure, which improves the mechanical properties of the fifth layer tube 500 and provides the overall mechanical properties of this combined tube.

[0035] The inner main body tube and / or the outer main body tube is a same-layer abutting splicing structure. The inner main body tube or the outer main body tube is a spliced tube, that is, both the inner main body tube and the outer main body tube are straight tubes with shorter lengths. In this embodiment, the gap support structure 600 plays a role in resisting bending.

[0036] In other embodiments, both the inner main body tube and the outer main body tube can be spliced tubes. However, in this case, the splicing joints of the inner main body tube and the outer main body tube should be staggered relative to each other, at least the splicing joints of the main body tubes in the spacer layer are staggered from each other, so as not to lose too much bending resistance.

[0037] The rods of the composite material assembled tower pole are formed by assembling profiles or special-shaped profiles. Its height and / or length, as well as the number of layers and / or thickness, can all meet the mechanical properties required by the design to the maximum extent, forming a stepped tower structure. In this embodiment, the pole main body is a circular tube. In other embodiments, the pole main body can be a square tube or a special-shaped tube. For example: profiles or special-shaped profiles formed by pultrusion molding, winding molding, die casting molding, 3D printing molding or other manufacturing molding methods form the main structure layer. The cross-sectional shapes of the same layer of the main structure layer are the same, the areas are equal, and they abut against each other to expand the height and / or length of the stepped assembled pole.

[0038] The main structure layers of profiles or special-shaped profiles formed by pultrusion molding, winding molding, die casting molding, 3D printing molding or other manufacturing molding methods are sleeved in multiple layers, and there are gaps between adjacent layers. The gaps between adjacent layers are provided with profile or special-shaped profile support structures. The multiple layers of main structure layers and multiple layers of support structure layers form a structure that can expand the cross-sectional area, and overall increase the strength of the stepped assembled rod.

[0039] All the joints where the main structural layers and the support structural layers of the members of the composite material assembled pole tower abut are misaligned. The joint where the outermost main structural layer abuts is provided with a sleeve, and the socketing length of the sleeve is 2 times the cross-sectional dimension of the main structural layer, and anti-slip-off measures are provided to increase the strength of the stepped assembled pole as a whole.

[0040] There are gaps between adjacent main structural layers of the members of the composite material assembled pole tower. The inner and outer envelope lines of the profiles or profiled bar support structures in each layer of the gaps form an integral surface contact with the inner and outer walls of the adjacent main structural layers. The perimeter of the gap is an integer multiple of the dimensions of the respective support structural layers, so that the members of each support structure are neatly arranged and evenly stressed in the gap, and the strength of the stepped assembled pole is improved as a whole.

[0041] The above content is only the preferred embodiment of the present invention. For those of ordinary skill in the art, many changes can be made in the specific implementation manners and application scopes according to the idea of the present invention. As long as these changes do not depart from the concept of the present invention, they all belong to the protection scope of the present invention.

Claims

1. Composite material assembled pole tower, characterized in that: It comprises at least two layers of main body tubes made of composite materials, and the outer main body tube is sheathed in the inner main body tube, the length of the inner main body tube is greater than that of the outer main body tube, and there is a gap between the outer and inner main body tubes; a gap support structure is provided at the gap for enhancing the mechanical properties of the main body tube; a plurality of supporting inner tubes are provided in the cavity enclosed by the inner wall of the inner main body tube for increasing the mechanical properties of the inner main body tube; the inner main body tube and / or the outer main body tube are of the same-layer abutment splicing structure; the gap support structure, the inner main body tube and / or the outer main body tube splicing end faces are staggered with each other.

2. The composite material assembled pole tower according to claim 1, characterized in that: The gap support structure includes multiple circular tubes, and the outer diameter of the circular tube is half of the difference between the inner diameter of the outer layer main body tube and the outer diameter of the inner layer main body tube. The circular tubes fill the space between the outer layer main body tube and the inner layer main body tube.

3. The composite material assembled pole tower according to claim 1, characterized in that: The gap support structure is a plurality of straight tubes with fan-shaped cross sections, and the fan-shaped straight tubes include a first curved wall that fits with the inner wall of the outer main body tube, a second curved wall that fits with the outer wall of the inner main body tube, and two supporting walls connecting and supporting the first curved wall and the second curved wall.

4. The composite material assembled pole tower according to claim 1, characterized in that: The gap support structure is a plurality of profiles with an "I"-shaped cross-section, and the profiles include a first arc-shaped wall that fits with the inner wall of the outer main body tube, a second arc-shaped wall that fits with the outer wall of the inner main body tube, and a support wall connecting and supporting the midpoint of the first arc-shaped wall and the midpoint of the second arc-shaped wall.

5. The composite material assembled pole tower according to claim 3 or 4, characterized in that: The first arc-shaped walls of the plurality of gap support structures are enclosed to form a circular tube in cross section.

6. The composite material assembled pole tower according to claim 3 or 4, characterized in that: The second arc-shaped walls of the plurality of gap support structures are enclosed to form a circular tube in cross section.

7. The composite material assembled pole tower according to claim 1, characterized in that: The supporting inner tube includes an arcuate wall and an abutting structure. When multiple supporting inner tubes are inserted into the inner main body tube, the abutting structures abut against each other, and the arcuate walls are combined to form a supporting surface abutting against the inner main body tube.

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