A large-thickness conical steel structure butt joint transverse welding asymmetric groove structure

Abstract

The application provides a butt joint transverse welding asymmetric groove structure of large-thickness conical steel structure, which comprises an upper conical steel structure body and a lower conical steel structure body, the upper conical steel structure body comprises a first conical body and a first base body, the lower conical steel structure body comprises a second conical body and a second base body, the first conical body is butt joint transversely welded with the second conical body, the side surface of the first base body is in the same plane with the side surface of the second base body, and the wall thicknesses of the upper conical steel structure body and the lower conical steel structure body are the same; the length of the line between the first end point a and the third end point b is Lab, the length of the line between the second end point c and the fourth end point d is Lcd, Lab=Lcd, Lab is parallel to Lcd, and the value range of Lab and Lcd is 55-65 mm. The butt joint transverse welding asymmetric groove structure of large-thickness conical steel structure can effectively reduce the welding workload, improve the welding efficiency, and ensure the welding quality and forming precision.

Description

Technical Field

[0001] This invention relates to the field of steel material welding, and more specifically, to an asymmetric bevel structure for butt welding of thick conical steel structures. Background Technology

[0002] With the upgrading of industrial equipment in my country, integrated molding of large structural components is becoming increasingly common. Compared with the traditional segmented welding technology, the amount of welding work is significantly reduced, and the overall performance and construction precision of the structural components are significantly improved. Traditional segmented welding produces small prototypes that are easy to hoist, and typically uses flat welding, resulting in good weld quality. Conical cylindrical structures are commonly used in nuclear power, petrochemical, and deep-sea equipment. Due to the size of the smelting ingots and the dimensions of the forming equipment, even with integrated molding technology, splicing through circumferential welds is still necessary. However, the welding of large structural components is more difficult due to the challenges of hoisting, requiring horizontal welding, which increases the welding difficulty compared to traditional horizontal welding.

[0003] GB / T981.5 "Recommended Grooves for Gas Welding, Shielded Metal Arc Welding, Gas Shielded Welding and High Energy Beam Welding" and CB / T "Groove Types and Dimensions for Welding of Ship Structures" and other standards specify the groove forms for different types of joints, most of which are symmetrical grooves. However, since the groove form is independent of the welding position in the standards, the recommended symmetrical groove form is adopted.

[0004] The prior art patent CN201610765126.7 discloses a welding method for Q390GJC steel used in building structures. The welding joint types include butt flat welding, butt horizontal welding, corner butt flat welding, T-corner horizontal welding, and T-corner non-penetration flat welding (ship-type). Submerged arc welding and CO2 gas shielded welding are used. Preheating is performed at 60℃. Multi-layer, multi-pass welding is employed, with interpass temperatures ranging from 150 to 200℃. While this patent solves the welding problem of Q390GJC steel, the use of symmetrical bevels for horizontal welding of thick, tapered steel structures suffers from problems such as large filler volume, low efficiency, and numerous weld defects, thus failing to guarantee the welding quality and forming accuracy of the thick, tapered steel structures.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] The purpose of this invention is to propose an asymmetrical bevel structure for butt welding of thick conical steel structures, in order to solve the problems of large filler volume, low efficiency, and many weld defects in the existing technology of using symmetrical bevels for horizontal welding of thick conical steel structures, which cannot guarantee the welding quality and forming accuracy of the thick conical steel structure.

[0007] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0008] A thick-walled conical steel structure with asymmetrical bevel joint for butt welding, comprising an upper conical steel structure and a lower conical steel structure.

[0009] The upper conical steel structure includes a first cone and a first base.

[0010] The lower conical steel structure includes a second cone and a second base.

[0011] The first cone and the second cone are butt-welded horizontally.

[0012] The first base and the second base form an angle α with the vertical direction. The side surface of the first base and the side surface of the second base are on the same plane. The wall thickness h of the upper conical steel structure and the lower conical steel structure is the same.

[0013] The endpoint of the interface between the first cone and the first base on the front bevel side is designated as the first endpoint a; the endpoint of the interface between the first cone and the first base on the reverse bevel side is designated as the second endpoint c; the endpoint of the interface between the second cone and the second base on the front bevel side is designated as the third endpoint b; and the endpoint of the interface between the second cone and the second base on the reverse bevel side is designated as the fourth endpoint d.

[0014] The line connecting the first endpoint a and the third endpoint b is a straight line ab, and the length of the straight line ab is Lab. The line connecting the second endpoint c and the fourth endpoint d is a straight line cd, and the length of the straight line cd is Lcd. Lab = Lcd, and the straight lines ab and cd are parallel. The values ​​of Lab and Lcd are in the range of 55 to 65 mm.

[0015] The inflection point of the bevel of the upper conical steel structure is the first inflection point o1, and the inflection point of the bevel of the lower conical steel structure is the second inflection point o2. The line connecting the first endpoint a and the second endpoint c is a straight line ac. The straight line o1e, which passes through the first inflection point o1 and the second inflection point o2 and is parallel to the straight line ab, divides the straight line ac into a first straight line segment ae and a second straight line segment ce. The length difference between the first straight line segment ae and the second straight line segment ce is 10 to 15 mm.

[0016] The line connecting the endpoint closest to the first inflection point o1 in the first endpoint a and the second endpoint c to the first inflection point o1 is the third straight line segment. The angle between the third straight line segment and the horizontal direction is β, and the value of β ranges from 35° to 45°.

[0017] The present invention discloses an asymmetrical bevel structure for butt welding of thick tapered steel structures, which solves the problem of butt welding of thick tapered steel structures. By designing the bevel structure as asymmetrical and combining the setting of bevel width, bevel angle, and the position of the bevel inflection point, the invention effectively reduces the amount of welding filler work, improves welding efficiency, and ensures the welding quality and forming accuracy of thick tapered steel structures. This invention provides technical support for the welding process design and manufacturing of large structural components in nuclear power, petrochemical, and deep-sea equipment.

[0018] Furthermore, the thickness h of the upper conical steel structure and the lower conical steel structure is 80-150 mm.

[0019] The present invention discloses an asymmetric bevel structure for butt welding of thick tapered steel structures, which is particularly suitable for butt welding of tapered steel structures with a thickness of 80 to 150 mm.

[0020] Furthermore, the gap between the first inflection point o1 and the second inflection point o2 is 0 to 2 mm.

[0021] Setting the gap between the first inflection point o1 and the second inflection point o2 to 0-2mm can prevent phenomena such as arc penetration and weld leakage, and ensure welding quality.

[0022] Furthermore, the welding position of the asymmetric bevel structure of the thick tapered steel structure is horizontal welding. During horizontal welding, the deeper bevel side of the front and back bevels is welded first, with a weld thickness of 20-25mm. Then, the shallower bevel side of the front and back bevels is cleaned. After the root cleaning is completed, the shallower bevel side of the front and back bevels is filled, and then the deeper bevel side of the front and back bevels is filled. The two sides are alternately filled until the filling is complete.

[0023] This welding sequence can ensure welding quality and forming accuracy, reduce welding deformation, and lower joint stress levels.

[0024] Furthermore, the depth of the root cleaning is 10-15 mm.

[0025] Furthermore, in the case of the thick-walled tapered steel structure with asymmetrical bevel for butt welding, the depth of filling on each side during horizontal welding is 15-20 mm.

[0026] Furthermore, the welding material used for the horizontal welding of the thick tapered steel structure with asymmetrical bevel is 800MPa grade WM80S gas shielded welding wire.

[0027] Furthermore, the welding gas used in the horizontal welding of the thick-thickness conical steel structure with asymmetrical bevel is 95% Ar + 5% CO2.

[0028] Furthermore, the thick tapered steel structure with asymmetrical bevel joint for butt welding is preheated within 100mm of the bevel before welding.

[0029] Furthermore, the preheating temperature is 120°C.

[0030] The present invention proposes an asymmetric bevel structure for butt welding of thick tapered steel structures. Compared with the prior art, the asymmetric bevel structure for butt welding of thick tapered steel structures described in the present invention has the following advantages:

[0031] 1) The present invention provides an asymmetric bevel structure for butt welding of thick tapered steel structures, which solves the problem of butt welding of thick tapered steel structures. By designing the bevel structure as an asymmetric structure, and combining the setting of the bevel width, bevel angle, and bevel inflection point, the bevel is easy to process, which can effectively reduce the amount of welding filling work, improve welding efficiency, and ensure the welding quality and forming accuracy of the thick tapered steel structure. It provides technical support for the welding process design and manufacturing of large structural components for equipment in nuclear power, petrochemical, and deep-sea industries.

[0032] 2) The present invention provides a thick tapered steel structure butt welded horizontally with an asymmetrical bevel structure. The asymmetrical bevel structure is used for horizontal welding. After root cleaning on the reverse side of the bevel, the weld volume on both sides of the bevel is basically the same, which is beneficial to improving stress distribution, reducing crack tendency, and improving structural performance.

[0033] 3) The asymmetric bevel structure for butt welding of thick tapered steel structures described in this invention, with its horizontal welding sequence, is beneficial for controlling the welding process of thick tapered steel structures, reducing welding deformation, lowering joint stress levels, and thus improving the accuracy and quality of structural construction. Attached Figure Description

[0034] Figure 1 This is one of the structural schematic diagrams of a butt-welded asymmetric bevel structure for a thick conical steel structure according to an embodiment of the present invention;

[0035] Figure 2 This is the second structural schematic diagram of a thick conical steel structure with asymmetric bevel joint for butt welding, as described in an embodiment of the present invention.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Upper conical steel structure; 11. First cone; 12. First base; 2. Lower conical steel structure; 21. Second cone; 22. Second base. Detailed Implementation

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in the embodiments of the present invention can be combined with each other. The descriptions of "first," "second," etc., mentioned in the embodiments of the present invention are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] This invention discloses a thick, tapered steel structure with asymmetrical bevel joint for butt welding, which is suitable for the design and manufacturing of welding processes for large structural components in equipment such as nuclear power, petrochemical, and deep-sea industries.

[0041] like Figure 1 and Figure 2 As shown, the asymmetric bevel structure for butt welding of the thick conical steel structure includes an upper conical steel structure 1 and a lower conical steel structure 2.

[0042] The upper conical steel structure 1 includes a first cone 11 and a first base 12.

[0043] The lower conical steel structure 2 includes a second cone 21 and a second base 22.

[0044] The first cone 11 and the second cone 21 are butt-welded horizontally.

[0045] The first substrate 12 and the second substrate 22 form an angle α with the vertical direction; this setting makes horizontal welding convenient and has a good weld appearance, and the bevel as a whole has a good welding angle.

[0046] Preferably, the value of α ranges from 15 to 30°. This setting facilitates horizontal welding and produces a good weld appearance, while the overall bevel has a good welding viewing angle.

[0047] The side surface of the first base 12 is on the same plane as the side surface of the second base 22, and the wall thickness h of the upper conical steel structure 1 and the lower conical steel structure 2 is the same; this setting can ensure construction accuracy, reduce welding stress, and prevent welding misalignment.

[0048] The endpoint of the interface between the first cone 11 and the first base 12 on the front bevel side is designated as the first endpoint a; the endpoint of the interface between the first cone 11 and the first base 12 on the reverse bevel side is designated as the second endpoint c; the endpoint of the interface between the second cone 21 and the second base 22 on the front bevel side is designated as the third endpoint b; and the endpoint of the interface between the second cone 21 and the second base 22 on the reverse bevel side is designated as the fourth endpoint d.

[0049] The line connecting the first endpoint a and the third endpoint b is straight line ab, with a length of Lab. The line connecting the second endpoint c and the fourth endpoint d is straight line cd, with a length of Lcd. Lab = Lcd, and straight lines ab and cd are parallel. The values ​​of Lab and Lcd range from 55 to 65 mm. This setting helps reduce the amount of welding work while ensuring welding quality.

[0050] The bevel midpoint of the upper conical steel structure 1 is the first bevel point o1, and the bevel midpoint of the lower conical steel structure 2 is the second bevel point o2. The line connecting the first endpoint a and the second endpoint c is a straight line ac. The straight line o1e, which passes through the first bevel point o1 and the second bevel point o2 and is parallel to the straight line ab, divides the straight line ac into a first straight line segment ae and a second straight line segment ce. The length difference between the first straight line segment ae and the second straight line segment ce is 10-15mm. This setting is beneficial to improve the stability of the joint on the one hand, ensure the welding quality on the other hand, and leave a margin for subsequent root cleaning.

[0051] The line connecting the endpoint closest to the first inflection point o1 in the first endpoint a and the second endpoint c to the first inflection point o1 is the third straight line segment. The angle between the third straight line segment and the horizontal direction is β, and the value of β ranges from 35° to 45°. This setting provides a better welding field of view for both the front and back sides of the bevel. A larger β can easily increase the welding workload, the difficulty of root welding, and the difficulty of reverse gouging.

[0052] The present invention discloses an asymmetrical bevel structure for butt welding of thick tapered steel structures, which solves the problem of butt welding of thick tapered steel structures. By designing the bevel structure as asymmetrical and combining the setting of bevel width, bevel angle, and the position of the bevel inflection point, the invention effectively reduces the amount of welding filler work, improves welding efficiency, and ensures the welding quality and forming accuracy of thick tapered steel structures. This invention provides technical support for the welding process design and manufacturing of large structural components in nuclear power, petrochemical, and deep-sea equipment.

[0053] Specifically, the thickness h of the upper conical steel structure 1 and the lower conical steel structure 2 is 80-150 mm.

[0054] The present invention discloses an asymmetric bevel structure for butt welding of thick tapered steel structures, which is particularly suitable for butt welding of tapered steel structures with a thickness of 80 to 150 mm.

[0055] Specifically, the gap between the first inflection point o1 and the second inflection point o2 is 0 to 2 mm.

[0056] Setting the gap between the first inflection point o1 and the second inflection point o2 to 0-2mm can prevent phenomena such as arc penetration and weld leakage, and ensure welding quality.

[0057] Specifically, in the horizontal welding of the thick-walled conical steel structure with an asymmetrical bevel, the deeper bevel side of the front and back bevels is welded first during horizontal welding. This helps reduce the difficulty of root cleaning. The weld thickness is 20-25mm. Excessive filling on one side at a time can easily lead to large deformation on the other side and also cause stress concentration during welding. Then, the shallower bevel side of the front and back bevels is cleaned, such as... Figure 2 As shown, the root cleaning depth is 10-15mm. At this point, the fourth straight segment o3f, which passes through the root of the bevel o3 and is parallel to the straight line ab, divides the straight line ac into the fifth straight segment af and the sixth straight segment fc. The lengths of the fifth straight segment af and the sixth straight segment fc are equal. After root cleaning, the weld volumes on both sides are basically equal, which is beneficial for improving stress distribution, reducing crack tendency, and improving structural performance. After root cleaning, the shallower bevel side of the front and back bevels is filled to a depth of 15-20mm, and then the deeper bevel side of the front and back bevels is filled to a depth of 15-20mm. The filling is carried out alternately on both sides until the filling is complete.

[0058] This welding sequence can ensure welding quality and forming accuracy, reduce welding deformation, and lower joint stress levels.

[0059] Specifically, in the case of the asymmetric bevel structure for butt welding of the thick tapered steel structure, the depth of filling on each side is 15-20mm during horizontal welding.

[0060] Specifically, the welding material used for the horizontal welding of the thick tapered steel structure with asymmetrical bevel is 800MPa grade WM80S gas shielded welding wire.

[0061] Specifically, the welding gas used in the horizontal welding of the thick tapered steel structure with asymmetrical bevel is 95% Ar + 5% CO2.

[0062] Specifically, the thick tapered steel structure with asymmetrical bevel for butt welding is preheated within 100mm of the bevel before welding.

[0063] Specifically, the preheating temperature is 120°C.

[0064] Specifically, the temperature between weld beads in the thick tapered steel structure with asymmetrical bevel for butt welding is 100-150℃ during horizontal welding.

[0065] This invention discloses an asymmetrical bevel structure for butt welding of thick tapered steel structures, solving the problem of butt welding of such structures. It is particularly suitable for welding tapered steel structures with a thickness of 80-150mm. By designing the bevel structure as asymmetrical, it is asymmetrical both vertically and horizontally, and the front and back bevels are also asymmetrical. Factors such as bevel width, bevel angle, bevel inflection point, and welding sequence are interrelated and work together. On the one hand, it effectively reduces the amount of welding filler work and improves welding efficiency; on the other hand, it reduces welding deformation and lowers joint stress levels. This ensures the welding quality and forming accuracy of thick tapered steel structures, providing technical support for the welding process design and manufacturing of large structural components in nuclear power, petrochemical, and deep-sea equipment.

[0066] Example 1

[0067] This embodiment proposes a thick tapered steel structure with asymmetrical bevel joint for butt welding. The thick tapered steel structure with asymmetrical bevel joint for butt welding is a tapered low-alloy steel structure for marine shaft supports. The total weight of the thick tapered steel structure with asymmetrical bevel joint for butt welding is 35 tons, the yield strength is 800MPa, and the thickness is 110mm.

[0068] like Figure 1 and Figure 2 As shown, the asymmetric bevel structure for butt welding of the thick conical steel structure includes an upper conical steel structure 1 and a lower conical steel structure 2.

[0069] The upper conical steel structure 1 includes a first cone 11 and a first base 12.

[0070] The lower conical steel structure 2 includes a second cone 21 and a second base 22.

[0071] The first cone 11 and the second cone 21 are butt-welded horizontally.

[0072] The first substrate 12 and the second substrate 22 form an angle α with the vertical direction, where α = 18°. This arrangement facilitates horizontal welding and produces a good weld appearance, while the overall bevel has a good welding viewing angle.

[0073] The side surface of the first base 12 and the side surface of the second base 22 are on the same plane. The wall thickness h of the upper conical steel structure 1 and the lower conical steel structure 2 is the same, and the thickness h is 110mm.

[0074] The endpoint of the interface between the first cone 11 and the first base 12 on the front bevel side is designated as the first endpoint a; the endpoint of the interface between the first cone 11 and the first base 12 on the reverse bevel side is designated as the second endpoint c; the endpoint of the interface between the second cone 21 and the second base 22 on the front bevel side is designated as the third endpoint b; and the endpoint of the interface between the second cone 21 and the second base 22 on the reverse bevel side is designated as the fourth endpoint d.

[0075] The line connecting the first endpoint a and the third endpoint b is line ab, with a length of Lab. The line connecting the second endpoint c and the fourth endpoint d is line cd, with a length of Lcd.

[0076] Line ab is parallel to line cd, and Lab = Lcd = 65 mm.

[0077] The inflection point at the midpoint of the bevel of the upper conical steel structure 1 is the first inflection point o1, and the inflection point at the midpoint of the bevel of the lower conical steel structure 2 is the second inflection point o2.

[0078] The gap between the first inflection point o1 and the second inflection point o2 is 0mm;

[0079] The line connecting the first endpoint a and the second endpoint c is a straight line ac. The straight line o1e, which passes through the first inflection point o1 and the second inflection point o2 and is parallel to the straight line ab, divides the straight line ac into a first straight line segment ae and a second straight line segment ce. The length difference between the first straight line segment ae and the second straight line segment ce is 15mm, and Lae-Lce=15mm.

[0080] like Figure 1 As shown, the endpoint closer to the first inflection point o1 among the first endpoint a and the second endpoint c is the second endpoint c. The line connecting the second endpoint c and the first inflection point o1 is the third straight line segment o1c. The angle between o1c and the horizontal direction is β = 45°.

[0081] like Figure 1 As shown, in this embodiment, the front bevel is the side with a deeper bevel, and the back bevel is the side with a shallower bevel.

[0082] When welding the asymmetrical bevel structure of the thick-walled conical steel structure, the bevel on the front side is welded first to reduce the difficulty of root cleaning. The weld thickness is 20mm. Excessive filling on one side at once can easily lead to significant deformation on the other side and cause stress concentration. Then, root cleaning is performed on the reverse side of the bevel. Figure 2As shown, the root cleaning depth is 15mm. At this point, the fourth straight segment o3f, which passes through the root of the bevel o3 and is parallel to the straight line ab, divides the straight line ac into the fifth straight segment af and the sixth straight segment fc. The lengths of the fifth straight segment af and the sixth straight segment fc are equal. After root cleaning, the weld volumes on both sides are basically equivalent, which is beneficial for improving stress distribution, reducing crack tendency, and improving structural performance. After root cleaning, the reverse bevel side is filled to a depth of 20mm, and then the front bevel side is filled to a depth of 20mm. The filling is carried out alternately on both sides until the filling is complete.

[0083] This welding sequence can ensure welding quality and forming accuracy, reduce welding deformation, and lower joint stress levels.

[0084] Specifically, the welding material used for the horizontal welding of the thick tapered steel structure with asymmetrical bevel is 800MPa grade WM80S gas shielded welding wire.

[0085] Specifically, the welding gas used in the horizontal welding of the thick tapered steel structure with asymmetrical bevel is 95% Ar + 5% CO2.

[0086] Specifically, the thick tapered steel structure with asymmetrical bevel for butt welding is preheated within 100mm of the bevel before welding.

[0087] Specifically, the preheating temperature is 120°C.

[0088] Specifically, the inter-weld temperature of the thick tapered steel structure with asymmetrical bevel for horizontal welding is 130°C during horizontal welding.

[0089] After welding, the weld was subjected to surface dye penetrant testing, and no cracks or other defects were found. Ultrasonic and radiographic testing of the weld were also performed, both yielding Grade I results. The sample's accuracy was measured, and the ellipticity was no higher than 12 mm, indicating high precision.

[0090] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A large thickness tapered steel structure butt-welded non-symmetrical groove structure, characterized in that, The upper conical steel structure (1) and the lower conical steel structure (2) are connected by butt joint horizontal welding, The upper conical steel structure (1) and the lower conical steel structure (2) are connected by butt joint horizontal welding, The upper conical steel structure (1) and the lower conical steel structure (2) are connected by butt joint horizontal welding, The first conical body (11) and the second conical body (21) are butt joint horizontally welded, The first base body (12) and the second base body (22) are at an angle α with the vertical direction, the side surface of the first base body (12) is in the same plane as the side surface of the second base body (22), and the wall thickness h of the upper conical steel structure (1) and the lower conical steel structure (2) is the same. The intersection of the first conical body (11) and the first base body (12) is at a first end point a on the side of the front bevel, the intersection of the first conical body (11) and the first base body (12) is at a second end point c on the side of the back bevel, the intersection of the second conical body (21) and the second base body (22) is at a third end point b on the side of the front bevel, and the intersection of the second conical body (21) and the second base body (22) is at a fourth end point d on the side of the back bevel, The line connecting the first end point a and the third end point b is a straight line ab, the length of the straight line ab is Lab, the line connecting the second end point c and the fourth end point d is a straight line cd, the length of the straight line cd is Lcd, Lab = Lcd, and the straight line ab is parallel to the straight line cd, the value range of Lab and Lcd is 55-65 mm; The bevel middle inflection point of the upper conical steel structure (1) is a first inflection point o1, the bevel middle inflection point of the lower conical steel structure (2) is a second inflection point o2, the line connecting the first end point a and the second end point c is a straight line ac, the straight line o1e passing through the first inflection point o1 and the second inflection point o2 and parallel to the straight line ab divides the straight line ac into a first straight line segment ae and a second straight line segment ce, and the length difference between the first straight line segment ae and the second straight line segment ce is 10-15 mm; The line connecting one end point of the first end point a and the second end point c close to the first inflection point o1 and the first inflection point o1 is a third straight line segment, the third straight line segment has an angle β with the horizontal direction, and the value range of β is 35-45°.

2. A large thickness conical steel structure butt-welded non-symmetrical groove structure according to claim 1, characterized in that, The thickness h of the upper conical steel structure (1) and the lower conical steel structure (2) is 80-150 mm.

3. A large thickness conical steel structure butt welded joint with asymmetric groove structure according to claim 2, characterized in that, The gap between the first inflection point o1 and the second inflection point o2 is 0-2 mm.

4. The large thickness, tapered steel structure butt-welded, non-symmetrical groove configuration of claim 1, wherein, The welding position of the large-thickness conical steel structure butt joint horizontal welding asymmetric bevel structure is horizontal welding, during the horizontal welding, the side of the deeper bevel in the front bevel and the back bevel is welded first, the welding thickness is 20-25 mm, then the side of the shallower bevel in the front bevel and the back bevel is cleaned, after the cleaning is completed, the side of the shallower bevel in the front bevel and the back bevel is filled, then the side of the deeper bevel in the front bevel and the back bevel is filled, and the filling is alternately performed on both sides until the filling is completed.

5. A large thickness conical steel structure butt welded joint with asymmetric groove according to claim 4, characterized in that, The depth of the cleaning is 10-15 mm.

6. A large thickness conical steel structure butt welded non-symmetrical groove configuration according to claim 4, characterized in that, The asymmetric groove structure of the butt joint horizontal welding of the large-thickness conical steel structure is used for horizontal welding, and the depth of each single-sided filling is 15-20 mm.

7. A large thickness conical steel structure butt welded joint with asymmetric groove according to claim 4, characterized in that, The asymmetric groove structure of the butt joint horizontal welding of the large-thickness conical steel structure is used for horizontal welding, and the welding material is 800 MPa grade WM80S gas protection welding wire.

8. A large thickness conical steel structure butt welded non-symmetrical groove configuration according to claim 4, characterized in that, The asymmetric groove structure of the butt joint horizontal welding of the large-thickness conical steel structure is used for horizontal welding, and the welding gas is 95% Ar+5% CO2.

9. A large thickness conical steel structure butt welded joint with asymmetric groove according to claim 4, characterized in that, The asymmetric groove structure of the butt joint horizontal welding of the large-thickness conical steel structure is preheated for 100 mm around the groove before welding.

10. A large thickness conical steel structure butt welded joint with asymmetric groove according to claim 9, characterized in that, The preheating temperature is 120 DEG C.

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