Symmetrical semicircular plate structure suitable for truss type pile leg

Abstract

The utility model discloses a symmetrical semicircular plate structure suitable for a truss type pile leg, which comprises two semicircular plates and a rack plate. The two ends of the two semicircular plates are welded to the two side faces of the rack plate correspondingly, and the two ends of the semicircular plates are connected with extension sections correspondingly. The semicircular plate and the extension section are integrated; the lower end parts of the extension sections are welded with the two side surfaces of the rack plate to form welding spots; and an included angle is formed between the outer side surface of the welding spot and the side surface of the rack plate. Under the condition that the size of the rack plate is kept, the strength of the chord member is increased, the bearing capacity of the pile leg is improved, meanwhile, under the condition that the same section area is kept, the section modulus of the chord member is increased, and the weight of the pile leg is further reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the safety detection technology of ocean engineering platform more specifically, relate to a kind of symmetry half-round plate structure suitable for truss type pile leg. BACKGROUND

[0002] Self-elevating platform is used to realize the necessary equipment of marine resource development, such as self-elevating drilling platform for oil and gas exploitation, self-elevating construction platform for offshore wind power equipment installation and special self-elevating accommodation platform.

[0003] As shown in Figure 1 Generally speaking, self-elevating platform has 3-6 pile legs 100, with the continuous innovation and development of offshore structures, self-elevating platform develops towards large lifting weight, high lifting height and large water depth, and the bearing capacity of pile leg 100 is required higher and higher, and the bearing capacity of single pile leg 100 exceeds 20000 tons.

[0004] As shown in Figure 2 Single pile leg 100 is generally composed of three inclined struts 101 (or horizontal struts) forming a triangle, and a chord 102 is arranged at the connecting position of the triangle, and a reverse triangle formed by three inner horizontal struts 103 is arranged in the triangle.

[0005] As shown in Figure 3 Chord 102 is the main bearing component of pile leg 100, and its size is also larger and larger, and half-round plate 1021 is bent into a semicircle and then welded with rack plate 1022, due to the limitation of rack plate 1022 specification, the size of chord 102 is too large to reduce the utilization rate of plate. INVENTION CONTENTS

[0006] In view of the defects in the prior art, the purpose of the utility model is to provide a symmetrical half-round plate structure suitable for truss type pile leg, which increases the strength of chord under the condition of maintaining the size of rack plate, improves the bearing capacity of pile leg, and increases the section modulus of chord under the condition of maintaining the same cross-sectional area, further reduces the weight of pile leg.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme:

[0008] A symmetrical half-round plate structure suitable for truss type pile leg, comprising half-round plates and rack plates, the half-round plates are provided with two, and are arranged as semicircular shape; two ends of the two half-round plates are respectively welded on two side surfaces of the rack plates;

[0009] The two ends of the half-round plate are connected with extension sections;

[0010] The half-round plate and the extension section are arranged as an integral type;

[0011] The lower end of the extension section is welded with the two side faces of the rack plate and forms a welding spot;

[0012] An included angle is formed between the outer side face of the welding spot and the side face of the rack plate.

[0013] Preferably, the material and thickness of the semi-circular plate and the extension section are the same.

[0014] Preferably, the angle of the included angle is 30°±1°.

[0015] Preferably, the outer corner on the welding spot is a rounded corner.

[0016] The symmetrical semi-circular plate structure provided by the utility model has the following beneficial effects:

[0017] 1) The cross-sectional area and the cross-sectional modulus of the chord are increased, and the load-bearing capacity and the stress balance of the chord are improved, while the width of the rack plate is unchanged. Since the rack plate is obtained by cutting a fixed-width thick plate, the width of the rack plate can be optimized to improve the utilization rate of the rack plate.

[0018] 2) The symmetrical semi-circular plate structure arrangement maximizes the cross-sectional area and the cross-sectional modulus of the chord, and also balances the stress of the chord of the pile leg.

[0019] 3) Under the condition of the same width of the rack plate, the new chord section has a larger moment of inertia radius, so that the new chord has a larger cross-sectional modulus under the same cross-sectional area, thereby further improving the load-bearing capacity of the chord.

[0020] 4) The chord structure can be adapted to a larger diameter inclined strut under the condition that the width of the semi-circular plate and the rack plate is unchanged, so that a larger diameter but thinner wall thickness inclined strut can be designed, further reducing the weight of the pile leg, reducing the material cost, and improving the utilization rate. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of an existing pile leg;

[0022] Figure 2 is a structural schematic view of an existing pile leg;

[0023] Figure 3 is a structural schematic view of a chord in an existing pile leg;

[0024] Figure 4 is a structural schematic view of a symmetrical semi-circular plate structure of the utility model;

[0025] Figure 5 is Figure 4 an enlarged schematic view of position A in the above

[0026] Figure 6 is the use state schematic view of the symmetrical semicircular plate structure of the utility model. DETAILED DESCRIPTION

[0027] In order to better understand the above technical scheme of the utility model, the technical scheme of the utility model is further explained below in combination with the drawings and embodiments.

[0028] In combination with Figures 4 to 6 The utility model provides a kind of symmetrical semicircular plate structure suitable for truss type pile leg, including semicircular plate 1 and rack plate 2, semicircular plate 1 is set two, and it is set as semicircle;Two ends of two semicircular plates 1 are welded on the two outer sides of rack plate 2 respectively, the above is part of prior art, here will not repeat again.Different from prior art, in the symmetrical semicircular plate structure of the utility model, the two end portions of semicircular plate 1 are all connected with extension section 3, and are welded and fixed with the two outer sides of rack plate 2 by extension section 3.

[0029] Semicircular plate 1 and extension section 3 are set as integrally formed, keep equal material, equal plate thickness.

[0030] The lower end of extension section 3 is welded with the two sides of rack plate 2, and forms weld point 4.

[0031] The included angle between the outer side of weld point 4 and the side of rack plate 2 is formed, and the angle of the included angle is 30 ° ± 1 °.

[0032] The outer angle 5 on weld point 4 is set as rounded corner.

[0033] The symmetrical semicircular plate structure of the utility model increases the cross-sectional area and section modulus of chord under the condition that the width of rack plate 2 is kept unchanged, so as to increase the carrying capacity of chord, and also keep the internal and external forces of chord balanced, improve the carrying capacity of pile leg, and increase the section modulus of chord under the condition that the same cross-sectional area is kept, further reduce the weight of pile leg.

[0034] The person skilled in the art in the technical field should realize that the above embodiments are only used to illustrate the utility model, and are not used as the limitation of the utility model, as long as the changes and variations of the above described embodiments are within the essential spirit range of the utility model, will fall within the scope of the claims of the utility model.

Claims

1. A symmetrical semicircular plate structure suitable for a truss-type pile leg, comprising a semicircular plate and a rack plate, wherein two semicircular plates are provided, each of which is semicircular in shape; the ends of the two semicircular plates are respectively welded to the two side surfaces of the rack plate, characterized in that: Both ends of the semicircular plate are connected to extension sections; The semicircular plate and the extension section are configured as an integral unit; The lower end of the extension section is welded to the two side surfaces of the rack plate to form a welding point; An angle is formed between the outer side surface of the welding point and the side surface of the rack plate.

2. The symmetrical semicircular plate structure suitable for a truss-type pile leg according to claim 1, characterized in that: The semicircular plate and the extension section are made of the same material and have the same thickness.

3. The symmetrical semicircular plate structure suitable for a truss-type pile leg according to claim 1, characterized in that: The angle is 30°±1°.

4. The symmetrical semicircular plate structure suitable for a truss-type pile leg according to claim 1, characterized in that: The outer corners on the welding points are rounded.

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