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CN-116479865-B - Main chord tube and manufacturing method thereof

CN116479865BCN 116479865 BCN116479865 BCN 116479865BCN-116479865-B

Abstract

The invention provides a main string pipe and a manufacturing method thereof, which relate to the field of ocean engineering equipment, and the main string pipe provided by the invention comprises: the rack plate and the main body comprise two pipe bodies which are symmetrically arranged on two sides of the rack plate respectively, the inside of the pipe body is of a porous structure, and the porous structure is connected with the inner wall of the pipe body. The main chord tube can reduce the consumption of steel materials, lighten the self-weight and save the construction cost.

Inventors

  • HAN HUAWEI
  • WANG YANGWEI

Assignees

  • 烟台大学

Dates

Publication Date
20260505
Application Date
20230506

Claims (8)

  1. 1. A main chord tube comprising: A rack plate (101); the main body comprises two pipe bodies (102), the two pipe bodies (102) are symmetrically arranged on two sides of the rack plate (101) respectively, a porous structure (103) is arranged in the pipe bodies (102), and the porous structure (103) is connected with the inner wall of the pipe bodies (102); the porous structure (103) comprises a plurality of cells which are arranged in a staggered way, and the axial direction of the cells is perpendicular to the rack plate (101); the rack plate (101) is used as a base plate, and pulse laser is used for carrying out additive molding on the rack plate (101) layer by layer, so that a main body of the main chord tube (1) is formed.
  2. 2. The main chord tube according to claim 1, wherein the side lengths of all the cells are the same.
  3. 3. The main chord tube according to claim 2, wherein the cross-sectional shape of the cells perpendicular to the axial direction is hexagonal or triangular or rectangular.
  4. 4. A main chord tube according to any of claims 1 to 3 wherein the side walls of all the cells are of the same thickness, the side walls being of a thickness of 2-4mm.
  5. 5. A method of manufacturing a main string pipe, characterized in that the main string pipe (1) is a main string pipe (1) as claimed in any one of claims 1 to 4, the method of manufacturing a main string pipe (1) comprising the steps of: determining the outline dimension of a rack plate (101) of the main string pipe (1), and cutting and polishing a plate body base material according to the outline dimension to manufacture the rack plate (101); taking the rack plate (101) as a base plate, and performing additive forming on the rack plate (101) by utilizing pulse laser in a layer-by-layer deposition mode so as to form a main body of the main chord tube (1); The step of forming the main body of the main chord tube (1) by taking the rack plate (101) as a base plate and performing additive forming on the rack plate (101) layer by utilizing pulse laser comprises a preheating stage, wherein the base plate is preheated by a preheating device in the preheating stage, and the heat preservation temperature of the preheating device is 150-230 ℃.
  6. 6. The method of manufacturing a main chord tube according to claim 5, wherein in the step of forming the main chord tube (1) body by performing additive forming by depositing the rack plate (101) layer by layer on the rack plate (101) using a pulse laser with the rack plate (101) as a substrate, the deposited layer is 2-4mm in height and 1.8-2.2mm in width when depositing layer by layer using the pulse laser.
  7. 7. The method of manufacturing a main string pipe according to claim 5, wherein in the step of forming the main string pipe (1) body by performing additive forming on the rack plate (101) layer by using pulse laser with the rack plate (101) as a substrate, a single-layer multi-pass lap welding mode is adopted, and the lap ratio is 50% -55%.
  8. 8. Method of manufacturing a main string pipe according to any of the claims 5-7, characterized in that in the step of forming the main string pipe (1) body by additive forming of the rack plate (101) layer by layer deposition on the rack plate (101) with pulsed laser, a protection device is arranged around the main string pipe (1), which protection device is used for achieving the isolation of the main string pipe (1) from oxygen.

Description

Main chord tube and manufacturing method thereof Technical Field The invention relates to the field of ocean engineering equipment, in particular to a main chord tube and a manufacturing method thereof. Background The legs of the jack-up platform can be divided into truss type legs and cylindrical type legs according to the structural form of the legs, wherein the truss type legs are one type of leg commonly used at present. The truss type pile leg is mainly formed by welding a main chord pipe, a horizontal supporting pipe, an inclined supporting pipe and the like, and the main chord pipe is connected with the horizontal supporting pipe and the inclined supporting pipe, so that the connection between the pile legs is more stable. The pipe wall of the existing main chord pipe is of an arc-shaped structure with a certain thickness, the main chord pipe is usually formed by die casting by a large-scale press machine, the dependence on a die device is high, steel materials are consumed more, the steel for the main chord pipe is high-strength steel with the minimum yield strength of 690MPa, the price of the steel is about $3000 per ton, and the construction cost is relatively high. Disclosure of Invention Therefore, the main chord tube aims to solve the technical problems that in the prior art, the main chord tube has more steel material consumption and higher construction cost, so that the main chord tube and the manufacturing method thereof have the advantages of reducing the steel material consumption, reducing the self-weight and saving the construction cost. In order to solve the above problems, the present invention provides a main chord pipe including: rack plate; The main body comprises two pipe bodies, the two pipe bodies are symmetrically arranged on two sides of the rack plate respectively, the inside of each pipe body is of a porous structure, and the porous structures are connected with the inner wall of each pipe body. As a preferred technical solution of the main chord tube, the porous structure comprises a plurality of cells which are arranged in a staggered way, and the axial direction of the cells is perpendicular to the rack plate. As a preferable technical scheme of the main chord tube, the side lengths of all the cells are the same. As a preferable technical scheme of the main chord tube, the cross section of the cell perpendicular to the axial direction is hexagonal, triangular or rectangular. As a preferable technical scheme of the main chord tube, the thickness of the side wall of all the cells is the same, and the thickness of the side wall is 2-4mm. A manufacturing method of a main chord tube, wherein the main chord tube is the main chord tube, the manufacturing method of the main chord tube comprises the following steps: Determining the external dimension of a rack plate of the main string pipe, and cutting and polishing a plate body base material according to the external dimension to manufacture the rack plate; Taking the rack plate as a base plate, and performing additive forming on the rack plate layer by utilizing pulse laser to form the main body of the main chord tube . As a preferable technical scheme of the manufacturing method of the main chord tube, the step of forming the main chord tube body by taking the rack plate as a substrate and carrying out additive forming on the rack plate layer by utilizing pulse laser comprises a preheating stage, wherein the substrate is preheated by a preheating device in the preheating stage, and the heat preservation temperature of the preheating device is 150-230 ℃. In the step of forming the main body of the main chord tube by using pulse laser to deposit the rack plate layer by layer on the rack plate serving as a substrate for additive forming, the height of a deposited layer is 2-4mm and the width is 1.8-2.2mm when the pulse laser is used for layer by layer deposition. As a preferred technical scheme of the manufacturing method of the main chord tube, in the step of forming the main chord tube body by using the rack plate as a substrate and utilizing pulse laser to deposit the rack plate layer by layer for carrying out additive forming, a single-layer multi-channel lap welding mode is adopted, and the lap ratio is 50% -55%. In the step of forming the main body of the main chord tube by performing additive forming on the rack plate layer by layer deposition on the rack plate by using pulse laser, a protection device is arranged around the main chord tube, and the protection device is used for realizing isolation of the main chord tube from oxygen. The technical scheme of the invention has the following advantages: 1. The main chord tube comprises a rack plate and a main body, wherein the main body comprises two tube bodies which are symmetrically arranged on two sides of the rack plate respectively, the inside of the tube body is of a porous structure, and the porous structure is connected with the inner wall of the tube body. According t