Preparation method of metal composite electric pole

Abstract

The invention relates to the field of electric power towers, in particular to a metal composite electric pole manufacturing method which comprises the steps that an electric pole is formed by winding a high-strength steel strip, supporting in the winding process and pressing after forming are conducted through a core mold, and the production problem that high-strength steel is used for the electric pole with the taper is solved.

Description

Technical Field

[0001] The present invention relates to the field of electric power poles and towers, and in particular to a method for preparing a metal composite electric pole. Background Art

[0002] The material of early electric poles in China has evolved from wood to reinforced concrete. As the name suggests, electric poles are poles for hanging electric wires. They are suitable for high and low voltage power transformation of urban and rural power grids and the installation of various overhead power lines and communication cables. They are one of the important infrastructures for power supply and communication.

[0003] Due to the development of steel and reinforced concrete, as well as technical requirements, these two materials have replaced most wooden poles. Steel is generally cast, while reinforced concrete is formed by setting up steel cages and pouring concrete. They have high overall strength, but for use conditions with higher strength requirements, the material strength needs to be further improved.

[0004] High-strength steel, specifically high-strength low-alloy steel, refers to grade Q460 steel, which has high strength, especially in the normalized or normalized and tempered state, has high comprehensive mechanical properties. It is generally used in heavy machinery, automobile frames and other occasions with high safety factor requirements. Whether this material can be used in electric poles has become a problem to be solved by the present invention. Summary of the invention

[0005] In order to solve the application problem of high-strength steel in electric poles, the present invention provides a method for preparing a metal composite electric pole.

[0006] The object of the present invention is achieved in the following manner: A method for preparing a metal composite electric pole, wherein the electric pole is formed by winding a high-strength steel strip 2 .

[0007] Furthermore, the method comprises the following steps: S1. Prepare a plurality of high-strength steel strips, and arrange the plurality of high-strength steel strips 2 along the width direction of the high-strength steel strips 2, and weld the adjacent high-strength steel strips 2 along the sides to form a whole; S2, prepare a core mold 1, the width of the core mold 1 gradually decreases from one end to the other end, the side of the high-strength steel strip 2 is abutted against the side of the core mold 1, and welds 3 connecting the high-strength steel strip 2 and the core mold 1 are respectively provided at the head end and the tail end of the core mold 1; S3, pre-bending the high-strength steel strip 2 through a plate rolling machine 41; S4, fix the core mold 1 on the rotating support 42, and set a hydraulic mechanism 43 on the side of the rotating support 42. The rotating support 42 drives the core mold 1 to stop rotating after every x° rotation, and the hydraulic mechanism 43 executes an action to press the high-strength steel strip 2 toward the core mold 1, x≤20; the rotating support 42 drives the core mold 1 to stop rotating after every y° rotation, and the welding gun 44 is used to weld the gap between the high-strength steel strip 2 coated on the core mold 1 and the high-strength steel strip 2 not coated on the core mold 1, y≥60; S5, through S4, the high-strength steel strip 2 is completely covered on the core mold 1 to form a conical rod body; S6, placing the rod body obtained in S5 in the outer mold 45, the outer mold 45 is provided with a conical groove that matches the rod body, and the weld 3 provided in S2 is cut off, and a push rod mechanism 46 is provided at the end of the outer mold 45 with a larger conical groove width, and the output end of the push rod mechanism 46 abuts against the end with a larger width of the core mold 1, and applies force toward the end with a smaller width of the core mold 1 to compress the high-strength steel strip 2; S7. Cut off the high-strength steel strips 2 at both ends of the core mold 1 along the end faces at both ends of the core mold 1.

[0008] Further, S2.1 is added: the high-strength steel strip 2 is cut into a fan-shaped structure, and the length of the side of the fan-shaped structure is greater than the length of the core mold 1.

[0009] Further, S4.1 is added: after the high-strength steel strip 2 is wound on the core mold 1 for at least one circle, the gap between the high-strength steel strip 2 coated on the core mold 1 and the high-strength steel strip 2 not coated on the core mold 1 is welded, and the aluminum strip 5 is prepared so that the end of the aluminum strip 5 abuts against the gap between the high-strength steel strip 2 coated on the core mold 1 and the high-strength steel strip 2 not coated on the core mold 1, and is pressed toward the core mold 1 together with the high-strength steel strip 2 not coated on the core mold 1 by the hydraulic mechanism 43.

[0010] As a solution, S8 is added: the core mold 1 is pulled out from the rod body formed by the high-strength steel strip 2.

[0011] As a solution, S8 is added: steel plates are respectively welded to both ends of the rod body formed by the high-strength steel strip 2.

[0012] Compared with the prior art, the electric pole of the present invention is formed by winding a high-strength steel strip, and a core mold is used for support during the winding process and for the compaction process after forming, thereby solving the production problem of high-strength steel for electric poles with a taper. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of a plurality of high-strength steel strips arranged along the width direction of the high-strength steel strips; Figure 2 It is a schematic diagram of cutting high-strength steel strip into fan-shaped structures and core molds; Figure 3 It is a schematic diagram of fixedly connecting the high-strength steel strip to the core mold; Figure 4 It is a schematic diagram of the workpiece being pre-bent by the plate rolling machine; Figure 5 It is a schematic diagram of the workpiece being pressed in by the hydraulic mechanism; Figure 6 It is a cross-sectional view of a rod body made of a steel strip rolled; Figure 7 It is a schematic diagram of the compaction process; Figure 8 It is a cross-sectional view of the rod body after machining; Fig. 9 It is a schematic diagram of adding aluminum strip to the workpiece; Fig.10 It is a schematic diagram of adding aluminum strip to the workpiece and forming it; Fig.11 is a schematic diagram of the support structure, where Fig.11 .1 is the main view of one of the split parts. Fig.11 .2 is a top view of the support; Fig.12 It is a schematic diagram of the pole installation structure.

[0014] Among them, core mold 1, high-strength steel strip 2, welding seam 3, aluminum strip 5; Plate rolling machine 41, rotating support 42, hydraulic mechanism 43, welding gun 44, outer mold 45, push rod mechanism 46; Support 6, flange 61, sleeve 62, inclined inner wall 621, fixing plate 63, support foot 64; Plug 7 and second flange 71. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] In the present invention, unless otherwise clearly stipulated and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0017] A method for preparing a metal composite electric pole, wherein the electric pole is formed by winding a high-strength steel strip 2.

[0018] Furthermore, the method comprises the following steps: S1, as attached Figure 1 As shown, the width of the existing high-strength steel strip 2 does not meet the demand, so a plurality of high-strength steel strips 2 are prepared, the thickness of the high-strength steel strip 2 is 1~4mm, preferably 1~2mm, and the plurality of high-strength steel strips 2 are arranged along the width direction of the high-strength steel strip 2, and the adjacent high-strength steel strips 2 are welded and fixed along the sides to form a whole, and the weld is preferably set in the gap between the adjacent high-strength steel strips 2, and the protruding part of the plate surface is cut off and polished.

[0019] S2, as attached Figure 2-3 As shown, a core mold 1 is prepared, and the width of the core mold 1 gradually decreases from one end to the other end. The side of the high-strength steel strip 2 is abutted against the side of the core mold 1, and welds 3 connecting the high-strength steel strip 2 and the core mold 1 are respectively provided at the head end and the tail end of the core mold 1. Only the head and tail welding is performed in order to remove the core mold 1 after subsequent processing.

[0020] As a preferred solution, S2.1: If the high-strength steel strip 2 is not cut, the high-strength steel strip 2 will curl on the conical core mold 1, and too much excess material will emerge at the end with a smaller width, which is not convenient for subsequent processing and is easy to interfere with other surrounding machines during the winding process. Therefore, the high-strength steel strip 2 is cut into a fan-shaped structure. The length of the side of the fan-shaped structure is greater than the length of the core mold 1, and when the core mold 1 and the high-strength steel strip 2 are fixed, the high-strength steel strip 2 extends from both ends of the core mold 1. The purpose of this setting is to leave some excess material to facilitate subsequent cutting of the excess material along the end faces at both ends of the core mold 1.

[0021] S3, as attached Figure 4 As shown, the high-strength steel strip 2 is pre-bent by a plate rolling machine 41. The plate rolling machine 41 is a prior art, and includes three rotating shafts, at least one of which is a driving shaft. The high-strength steel strip 2 is gradually bent by the rotation of the rotating shafts, which facilitates subsequent further bending.

[0022] S4, as attached Figure 5 As shown, the core mold 1 is fixed on a rotating support 42. The rotating support 42 is a prior art and includes two rotating parts. The rotating parts on the two rotating supports 42 are respectively fixed to the two ends of the core mold 1. The rotating parts can also be connected to a rotating drive mechanism such as a motor and a hydraulic motor to drive the core mold 1 to rotate. A hydraulic mechanism 43 is set on the side of the rotating support 42. The hydraulic mechanism 43 can use an existing hydraulic press or a large hydraulic rod. The rotating support 42 drives the core mold 1 to stop rotating after rotating x degrees, and the hydraulic mechanism 43 executes an action to press the high-strength steel strip 2 toward the core mold 1. The value of x varies according to the precision requirement. The higher the precision requirement, the smaller x is. x>20 will lead to poor forming effect. The rotating support 42 drives the core mold 1 to stop rotating after each rotation of y°, and welds the gap between the high-strength steel strip 2 coated on the core mold 1 and the high-strength steel strip 2 not coated on the core mold 1 through the welding gun 44. y≥60, welding can be performed every other section, or welding can be performed only once at the tail section after the high-strength steel strip 2 is completely wound into the rod body. It can be set according to needs.

[0023] As a preferred solution, S4.1: As shown in the attached Figure 9-10 As shown, after the high-strength steel strip 2 is wound on the core mold 1 for at least one circle, the gap between the high-strength steel strip 2 coated on the core mold 1 and the high-strength steel strip 2 not coated on the core mold 1 is welded, and an aluminum strip 5 is prepared so that the end of the aluminum strip 5 abuts against the gap between the high-strength steel strip 2 coated on the core mold 1 and the high-strength steel strip 2 not coated on the core mold 1, and is pressed toward the core mold 1 by the hydraulic mechanism 43 together with the high-strength steel strip 2 not coated on the core mold 1. By adding the coated aluminum strip 5, the overall weight of the finished product is reduced.

[0024] S5, as attached Figure 6 As shown, through S4, the high-strength steel strip 2 is completely covered on the core mold 1 to form a conical rod body.

[0025] S6, as attached Figure 7 As shown, the rod body obtained by S5 is placed in the outer mold 45, and a conical groove matching the rod body is provided on the outer mold 45, and the weld 3 provided in S2 is cut off. A push rod mechanism 46 is provided at the end of the outer mold 45 with a larger conical groove width, and the output end of the push rod mechanism 46 abuts against the end with a larger width of the core mold 1, and applies force toward the end with a smaller width of the core mold 1 to press the high-strength steel strip 2, so that the multi-layer high-strength steel strip 2 is further squeezed and pressed through the conical structure. The outer mold 45 and the push rod mechanism 46 are preferably fixed to the ground or fixed between the two. S7, cutting off the high-strength steel strips 2 at both ends of the core mold 1 along the end faces at both ends of the core mold 1 to form.

[0026] As a solution, if Figure 8 As shown in the middle right figure, since the core mold 1 is no longer fixed to the high-strength steel belt 2, the core mold 1 is pulled out from the rod body formed by the high-strength steel belt 2 to reduce the overall weight and form a hollow rod body.

[0027] As another option, Figure 8 As shown in the middle left figure, in order to strengthen the overall structure, steel plates are welded at both ends of the rod body formed by the high-strength steel belt 2, and the core mold 1 is sealed into the rod body. Based on the above method, the formed rod body is a cylindrical structure formed by stacking multiple layers of high-strength steel belts 2. The multiple layers of high-strength steel belts 2 are rolled from a whole piece of high-strength steel belts 2. According to the preferred embodiment, a layer of aluminum belt 5 is arranged between two adjacent layers of high-strength steel belts 2.

[0028] For this high-strength steel multi-layer structure, the traditional structure of drilling holes on the surface of the rod to fix the flange, or directly welding the flange on the surface is no longer applicable, so the installation structure needs to be improved.

[0029] As attached Figure 11-12 As shown, a pole installation structure includes the above-mentioned metal composite pole, the width of the pole gradually decreases from the bottom to the top, the bottom of the pole is inserted and fixed in the support 6, the support 6 includes a flange 61, the top of the flange 61 is fixedly connected to the sleeve 62, the sleeve 62 is provided with an inclined inner wall 621 that matches the bottom of the pole, the inclined inner wall 621 and the bottom of the pole are preferably interference fit, and the pole is locked in the support 6 through a conical fit, and the support 6 is divided into at least two split parts along the radius of the flange 61, two of which are shown in the figure, and preferably 3-4 equally divided split parts, and each split part is fixedly connected to form a complete support 6.

[0030] Furthermore, each split part has an arc segment that constitutes a sleeve 62, and both ends of the arc segment are respectively fixedly connected to a fixing plate 63. The fixing plate 63 can be further welded and fixed to the flange 61. Two adjacent split parts are fixedly connected by the fixing plate 63, and the two fixing plates are preferably fixed by at least one bolt.

[0031] Furthermore, the top of the flange 61 is fixedly connected to a support leg 64, and the side of the support leg 64 is fixedly connected to the side of the sleeve 62 to assist the rod body in resisting lateral wind.

[0032] Further, as attached Fig.12As shown at the top, a plug 7 is arranged in the cylinder structure at the top of the pole. The plug 7 is also a cone that matches the top of the pole. The top of the plug 7 is fixedly connected to the second flange 71, and the bottom of the second flange 71 abuts against the top of the pole. During the production process, after the core mold 1 is removed, the plug 7 is sent into the bottom of the cylinder structure, and moved to the top of the cylinder structure and welded and fixed to the second flange 71. The two limit each other, and the second flange 71 is used to facilitate the fixing of the wire fixing structure at the top of the pole, or as a connecting piece, to connect with the flange 61 of another pole (the flange 61 does not need to be designed with support legs 64), so that multiple sections of the pole structure can be spliced. This is because the winding work of an overly long pole is complicated, so the scheme of the present invention is changed to multi-section production and overall splicing.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, which should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing a metal composite pole, characterized in that: The method comprises the following steps: the electric pole is formed by winding a high-strength steel strip (2).

2. A method for preparing a metal composite pole according to claim 1, characterized in that: The method comprises the following steps: S1. preparing a plurality of high-strength steel strips, arranging the plurality of high-strength steel strips (2) along the width direction of the high-strength steel strips (2), and welding adjacent high-strength steel strips (2) along the sides to form a whole; S2, preparing a core mold (1), the width of which gradually decreases from one end to the other end, placing the side of the high-strength steel strip (2) in contact with the side of the core mold (1), and providing welds (3) connecting the high-strength steel strip (2) and the core mold (1) at the head end and the tail end of the core mold (1); S3, pre-bending the high-strength steel strip (2) through a plate rolling machine (41); S4, the core mold (1) is fixed on the rotating support (42), a hydraulic mechanism (43) is arranged on the side of the rotating support (42), the rotating support (42) drives the core mold (1) to stop rotating after every rotation of x°, and the hydraulic mechanism (43) is executed to press the high-strength steel strip (2) toward the core mold (1), x≤20; the rotating support (42) drives the core mold (1) to stop rotating after every rotation of y°, and the welding gun (44) is used to weld the gap between the high-strength steel strip (2) coated on the core mold (1) and the high-strength steel strip (2) not coated on the core mold (1), y≥60; S5, through S4, the high-strength steel strip (2) is completely covered on the core mold (1) to form a conical rod body; S6, placing the rod body obtained in S5 in an outer mold (45), the outer mold (45) being provided with a conical groove matching the rod body, and the weld (3) provided in S2 being cut off, and a push rod mechanism (46) being provided at the end with a larger width of the conical groove of the outer mold (45), the output end of the push rod mechanism (46) being abutted against the end with a larger width of the core mold (1), and applying force toward the end with a smaller width of the core mold (1), thereby pressing the high-strength steel strip (2); S7. Cut off the high-strength steel strips (2) at both ends of the core mold (1) along the end faces of both ends of the core mold (1).

3. A method for preparing a metal composite pole according to claim 2, characterized in that: Add S2.1: Cut the high-strength steel strip (2) into a fan-shaped structure, wherein the length of the side of the fan-shaped structure is greater than the length of the core mold (1).

4. A method for preparing a metal composite pole according to claim 2, characterized in that: Add S4.1: After the high-strength steel strip (2) is wound on the core mold (1) for at least one turn, the gap between the high-strength steel strip (2) coated on the core mold (1) and the high-strength steel strip (2) not coated on the core mold (1) is welded, and an aluminum strip (5) is prepared so that the end of the aluminum strip (5) abuts against the gap between the high-strength steel strip (2) coated on the core mold (1) and the high-strength steel strip (2) not coated on the core mold (1), and is pressed toward the core mold (1) together with the high-strength steel strip (2) not coated on the core mold (1) by the hydraulic mechanism (43).

5. A method for preparing a metal composite pole according to any one of claims 1 to 4, characterized in that: Add S8: pull the core mold (1) out of the rod body formed by the high-strength steel strip (2).

6. A method for preparing a metal composite pole according to any one of claims 1 to 4, characterized in that: Add S8: Steel plates are welded to both ends of the rod body formed by the high-strength steel strip (2).

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