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A half-chord plate steel for ultra-thick offshore petroleum machinery and its preparation method and application

A technology of offshore oil and half-chord plate type, which is applied in the direction of metal rolling, artificial islands, underwater structures, etc., and can solve problems such as the inability to apply half-chord plate steel production

Active Publication Date: 2017-04-12
SHANDONG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This cold bending is to bend the plate and strip as a raw material after being rolled and formed. It is used for products with thinner dimensions and shorter lengths. It cannot be applied to the production of half-chord plate steel for offshore oil machinery.

Method used

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  • A half-chord plate steel for ultra-thick offshore petroleum machinery and its preparation method and application
  • A half-chord plate steel for ultra-thick offshore petroleum machinery and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] An ultra-thick semi-chord plate steel for offshore petroleum machinery, the structure is as follows figure 1 As shown, the longitudinal section of the half-chord shaped steel is arc-shaped as a whole and symmetrical with the center line as the axis. The upper surface of the half-chord shaped steel is R1 arc-shaped, and the lower surface of the half-chord shaped steel is R2 arc-shaped. The arc shape of R1 and the arc shape of R2 are concentric circles, the upper surface and the lower surface of the half-chord plate section steel are connected through the bottom side, and an inner groove is provided at the connection between the bottom surface and the bottom side of the half-chord plate section steel. The difference H2 between the arcs of R1 and R2 is 85mm, which is the thickness of the half-chord plate steel. The ultra-thick half-chord plate steel for offshore oil machinery should be suitable for the pile leg structure with a height of 400 feet.

[0066] The included ang...

Embodiment 2

[0077] With the ultra-thick semi-chord plate steel for offshore petroleum machinery described in Example 1, the difference is that

[0078] The difference H2 between the R1 arc shape and the R2 arc shape radius is 50 mm, which is the thickness of the half-chord plate steel. This ultra-thick half-chord plate steel for offshore oil machinery should be suitable for the pile leg structure with a height of 400 feet.

[0079] The included angle φ between the inner groove and the bottom side is 41.5°, and the width B3 of the inner groove is 2 / 5 of the thickness of the half-chord steel. The outer arc and the bottom side are connected by a smooth arc R3, and the vertical height between the lowest point and the highest point of the arc is 15mm.

Embodiment 3

[0081] With the ultra-thick semi-chord plate steel for offshore petroleum machinery described in Example 1, the difference is that

[0082] The difference H2 between the R1 arc shape and the R2 arc shape radius is 30mm, which is the thickness of the half-chord plate steel. This ultra-thick half-chord plate steel for offshore oil machinery should be suitable for the pile leg structure with a height of 300 feet.

[0083] The included angle φ between the inner bevel and the bottom side is 41°, and the width B3 of the inner bevel is 2 / 5 of the thickness of the half chord steel. The outer arc and the bottom side are connected by a smooth arc R3, and the vertical height between the lowest point and the highest point of the arc is 10mm.

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Abstract

The invention relates to a super-thick semi-chord plate section steel for offshore petroleum machinery as well as a preparation method and application of the super-thick semi-chord plate section steel. The semi-chord plate section steel is prepared through the following steps: heating and rolling rectangular blank, rough rolling, precision rolling and cooling; the longitudinal section of the semi-chord section steel is an arc-shaped structure and is bilaterally symmetrical by taking the center line as an axis; the upper surface of the semi-chord section steel is an R1 circular arc; the lower surface of the semi-chord section steel is an R2 circular arc; the R1 circular arc and the R2 circular arc are concentric circles; the upper surface and the lower surface of the semi-chord section steel are connected through a bottom side edge; and an inner groove is formed in the connection part between the lower surface of the semi-chord section steel and the bottom side edge. The semi-chord plate section steel is produced through a hot rolling method while the using performance of the product is ensured, and can be used for replacing the product obtained by hot bending a super-thick plate and carrying out a plurality of machining processes, the semi-chord plate section steel has the advantages of effectively reducing the manufacturing cost, decreasing the defects such as stress concentration and the like caused by cold bending or hot bending and improving the uniform stable performance of the product organization.

Description

technical field [0001] The invention relates to an ultra-thick semi-chord plate steel for offshore petroleum machinery and a preparation method and application thereof, belonging to the technical fields of machine manufacturing and metal material processing and forming. Background technique [0002] At present, domestically produced products with similar shapes are cold-bent or hot-bent wide and thick plates with the same performance, and some parts are processed by machine cutting and turning, which leads to low productivity, large waste of materials, high processing costs, and machining Equipment capabilities are difficult to achieve. [0003] The jack-up drilling platform is divided into two types according to the form of the legs: the independent leg type and the sedimentation type. The independent leg type is composed of the platform and the pile legs. The legs are independent of each other and not connected. The weight of the entire platform is supported by each leg. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B17/00C22C38/54C21D8/00
CPCB21B1/46C22C38/02C22C38/04C22C38/44C22C38/50C22C38/54E02B17/00
Inventor 孙卫华周长秀董杰胡淑娥张婕刘福宁刘平陈良杨栋裴建华
Owner SHANDONG IRON & STEEL CO LTD
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