Large-diameter thick-wall steel pipe welding device for inverted siphon construction

Abstract

The invention discloses a large-diameter thick-wall steel pipe welding device for inverted siphon construction, and particularly relates to the field of steel pipe welding, the large-diameter thick-wall steel pipe welding device comprises a rack, two sets of supporting mechanisms are arranged on the rack, and the supporting mechanisms are used for positioning and supporting a conical steel pipe; the supporting mechanism comprises two supporting assemblies capable of synchronously moving in different directions, the conical steel pipe is supported by the two supporting assemblies, the positions, making contact with the conical steel pipe, of the supporting assemblies are supporting areas, the conicity of the supporting areas is the same as that of the outer wall of the conical steel pipe, and the conical steel pipe can be in a horizontal state. An adjusting mechanism is further arranged on the supporting assembly and used for adjusting the taper of the supporting area. The supporting mechanism is arranged, the conical pipeline can be stably supported, it is guaranteed that the conical pipeline is in a stable horizontal state during welding, and the adjusting mechanism is arranged, so that when the conical pipeline is supported by the supporting mechanism, the supporting mechanism is suitable for stably supporting the conical pipelines with different tapers, and the horizontal state of the conical pipeline is kept.

Description

Technical Field

[0001] The invention relates to the technical field of steel pipe welding, and more specifically to a large-diameter thick-walled steel pipe welding device for inverted siphon construction. Background Art

[0002] Inverted siphon construction refers to the use of liquid gravity and air pressure principles in pipeline engineering to make liquid flow through a section of pipe that is higher than the liquid storage level to achieve the purpose of drainage or transportation. Its basic principle is similar to the siphon phenomenon, but the difference is that the inverted siphon pipeline design allows the liquid to flow in the reverse direction, which is usually used in specific terrain or environment.

[0003] The pipelines used in the construction of inverted siphons are usually formed by welding multiple steel pipes together. Currently, for welding between steel pipes, two steel pipes are usually placed flat and then the ends of the two steel pipes are welded together to complete the welding and fixing of the steel pipes. However, the pipelines used in the construction of inverted siphons often have some tapered pipes, and the diameters of the two ends of the tapered pipes are different. When the water flows, as the cross-sectional area of ​​the tapered pipe gradually decreases, the flow rate of the fluid can be effectively increased. During the flow of the liquid, the increase in the flow rate helps to maintain the power of the liquid and avoid stagnation in the valve or pipe, thereby improving the efficiency of the overall system.

[0004] The conical pipeline in the inverted siphon construction is mainly formed by welding multiple conical steel pipes in sequence. However, due to the conical setting of the steel pipe, when two conical steel pipes are butt-welded, in order to ensure the horizontal placement of the two conical steel pipes, it is necessary to set supports that match the taper of the conical steel pipe to ensure the horizontal placement of the conical steel pipe before welding. However, when it is necessary to weld conical steel pipes with different tapers, it is necessary to replace the supports. However, since the conical steel pipe is a large-diameter thick-walled steel pipe with a large overall weight, its supports need to have sufficient strength and rigidity. Therefore, the weight of its supports is usually also large, which easily makes the replacement of its supports cumbersome and inconvenient. In addition, the replaced supports also need to be precisely adjusted to ensure that they are in a stable horizontal state to support the conical steel pipe. Summary of the invention

[0005] The invention provides a large-diameter thick-walled steel pipe welding device for inverted siphon construction, and aims to solve the following problem: in the existing welding of two tapered steel pipes, it is necessary to set a support member matching the taper of the tapered steel pipe to ensure that the tapered steel pipe is placed horizontally before welding. However, when it is necessary to weld tapered steel pipes with different tapers, it is necessary to replace the support member. However, since the tapered steel pipe is a large-diameter thick-walled steel pipe and its overall weight is relatively large, its support member needs to have sufficient strength and rigidity. Therefore, its support member is usually also heavy, which easily makes the replacement of its support member cumbersome and inconvenient. In addition, the replaced support member also needs to be precisely adjusted to ensure that it is in a stable horizontal state to support the tapered steel pipe.

[0006] To achieve the above object, the present invention provides the following technical solutions: A large-diameter thick-walled steel pipe welding device for inverted siphon construction, comprising: a frame, on which two sets of supporting mechanisms are arranged, and the supporting mechanisms are used to position and support the tapered steel pipe; The supporting mechanism includes two supporting components that can move synchronously in different directions. The tapered steel pipe is supported by the two supporting components, and the contact position between the supporting components and the tapered steel pipe is the supporting area. The supporting area has the same taper as the outer wall of the tapered steel pipe, so that the tapered steel pipe can be in a horizontal state. The support assembly is also provided with an adjustment mechanism, which is used to adjust the taper of the support area to support tapered steel pipes with different tapers; A welding mechanism is also arranged on the frame. The welding mechanism comprises a welding gun which can move along a welding track. The welding gun is used to weld two tapered steel pipes along the welding track.

[0007] In a preferred embodiment, the support mechanism further includes a base, a screw rod is arranged on the base, two slide seats are slidably arranged on the base, both slide seats are threadedly connected with the screw rod, and the two support assemblies are respectively arranged on the corresponding slide seats.

[0008] In a preferred embodiment, the adjustment mechanism is an adjustment component 1, and the adjustment component 1 includes a rotatably arranged connecting shaft, and a supporting roller 1 is detachably mounted on the connecting shaft.

[0009] In a preferred embodiment, the support roller 1 includes two support plates 1, a positioning hole is opened on the connecting shaft, and a positioning shaft is provided on both support plates 1. The support plate 1 is positioned and installed on the connecting shaft through the positioning shaft and the positioning hole. A side plate is installed on the connecting shaft, and a fastener 1 is provided on the side plate. The support plate 1 is fixedly installed on the connecting shaft through the fastener 1.

[0010] In a preferred embodiment, the adjustment mechanism is an adjustment component 2, the adjustment component 2 includes a support roller 2, the support roller 2 includes a plurality of support plates 2, a fastener 2 is provided on the connecting shaft, the plurality of support plates 2 are fixedly mounted on the connecting shaft by the fastener 2, and the outer wall tapers of the plurality of support plates 2 are all different, a power component is installed on the slide seat, and the output end of the power component is fixedly connected to the connecting shaft.

[0011] In a preferred embodiment, a positioning mechanism is provided on the frame, and the positioning mechanism includes a driving member 1, a threaded shaft is installed on the output end of the driving member 1, a push plate is slidably provided on the frame, the push plate is threadedly connected with the threaded shaft, a guide rail is provided on the frame, the push plate is slidably provided on the guide rail, and the push plate is used to push the conical steel pipe to move.

[0012] In a preferred embodiment, a gap separation mechanism is provided on the frame, and the gap separation mechanism includes a fixing ring, which is fixedly mounted on the frame, and a driving member 2 is mounted on the fixing ring. A partition is mounted on the output end of the driving member 2, and the partition is located between two conical steel pipes, and the two conical steel pipes are both in close contact with the partition.

[0013] In a preferred embodiment, the partition includes two abutment plates that can move synchronously in opposite directions. The two abutment plates are respectively tightly attached to the corresponding conical steel pipes. Through the synchronous opposite direction movement of the two abutment plates, the two abutment plates are separated from the corresponding conical steel pipes, and then the two abutment plates are driven to move out of the welding track.

[0014] In a preferred embodiment, the welding device also includes a driving mechanism, which includes a fixed seat, the fixed seat is installed at the output end of the driving member 2, and the two abutment plates are slidably arranged in the fixed seat, a driving shaft is installed on the fixed seat, an elliptical wheel is fixedly arranged on the driving shaft, the driving shaft is used to drive the elliptical wheel to rotate, the elliptical wheel is in active contact with the two abutment plates, and an elastic member is arranged between the two abutment plates.

[0015] In a preferred embodiment, the welding mechanism includes a driving member three, which is installed on a fixed ring, a gear is installed on the output end of the driving member three, a gear ring is rotatably arranged on the fixed ring, the gear is meshed with the gear ring, a connecting plate is fixedly installed on the gear ring, a welding gun is installed on the connecting plate, and the welding end of the welding gun points to the welding track between the two conical steel pipes.

[0016] The beneficial effects of the present invention are: The present invention can stably support the tapered pipe by arranging a supporting mechanism, and ensure that the tapered pipe is in a stable horizontal state during welding; and by arranging an adjusting mechanism, when supporting the tapered pipe, the present invention can be suitable for stably supporting tapered pipes with different tapers and maintaining the horizontal state of the tapered pipe.

[0017] The present invention provides a gap separation mechanism to ensure that a stable gap is left between the two tapered steel pipes when the tapered steel pipes are welded, thereby solving the problem that the tapered steel pipe is easily slipped due to its weight and a tapered support mechanism, resulting in misalignment between the two tapered steel pipes.

[0018] The present invention provides a partition consisting of two abutment plates that can move synchronously in opposite directions, and provides a driving mechanism to drive the two abutment plates to move in opposite directions, so that when the partition is taken out, the two abutment plates can be separated from the corresponding conical steel pipes, thereby avoiding the problem of wear of the conical steel pipe and debris generated by wear due to friction between the abutment plates and the conical steel pipe, which affects the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The three-dimensional structure of the present invention is shown in FIG. Figure 1 .

[0020] Figure 2 It is a schematic diagram of the three-dimensional structure of the support mechanism of the present invention.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the adjustment component 1 of the present invention.

[0022] Figure 4 It is a schematic diagram of the three-dimensional structure of the regulating component 2 of the present invention.

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the positioning mechanism of the present invention.

[0024] Figure 6 The three-dimensional structure of the present invention is shown in FIG. Figure 2 .

[0025] Figure 7 It is a schematic cross-sectional structural diagram of the gap separation mechanism of the present invention.

[0026] Figure 8 It is a schematic cross-sectional structural diagram of the driving mechanism of the present invention.

[0027] Fig. 9 It is a schematic diagram of another working state of the driving mechanism of the present invention.

[0028] Fig.10 for Figure 1 Enlarged view of part A.

[0029] The accompanying drawings are marked as follows: 1, frame; 2, supporting mechanism; 21, base; 22, screw rod; 23, slide seat; 24, supporting assembly; 3, adjusting assembly one; 31, connecting shaft; 311, positioning hole; 32, supporting roller one; 321, positioning shaft; 33, side plate; 34, fastener one; 4, adjusting assembly two; 41, supporting roller two; 42, fastener two; 43, power component; 5, tapered steel pipe; 6, positioning mechanism; 61, driving member one; 62, threaded shaft; 63, push plate; 64, guide rail; 7, gap separation mechanism; 71, fixing ring; 72, driving member two; 73, partition; 731, back plate; 8, driving mechanism; 81, fixing seat; 82, driving shaft; 83, elliptical wheel; 84, elastic member; 9, welding mechanism; 91, driving member three; 92, gear; 93, gear ring; 94, connecting plate; 95, welding gun. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0031] Refer to the instruction manual Figures 1 to 10 , a large-diameter thick-walled steel pipe welding device for inverted siphon construction, comprising: a frame 1, on which two sets of supporting mechanisms 2 are arranged, and the supporting mechanisms 2 are used to position and support the tapered steel pipe 5; The support mechanism 2 includes two support components 24 that can move synchronously in opposite directions. The tapered steel pipe 5 is supported by the two support components 24, and the contact position between the support components 24 and the tapered steel pipe 5 is the support area. The support area has the same taper as the outer wall of the tapered steel pipe 5, so that the tapered steel pipe 5 can be in a horizontal state. The support assembly 24 is also provided with an adjustment mechanism, which is used to adjust the taper of the support area to support tapered steel pipes 5 with different tapers; A welding mechanism 9 is also provided on the frame 1. The welding mechanism 9 includes a welding gun 95 that can move along a welding track. The welding gun 95 is used to weld two tapered steel pipes 5 along the welding track.

[0032] It should be noted that the support assembly 24 is a conically arranged roller, and the outer wall taper of the roller is the same as the outer wall taper of the conical steel pipe 5. The adjustment mechanism can be angle adjustment, and the angle adjustment can be performed by a hydraulic cylinder. By adjusting the angle of the roller, the roller can stably support the conical steel pipe 5 with different tapers.

[0033] The specific implementation scenario is as follows: first, two tapered steel pipes 5 are placed on the corresponding support mechanism 2, and the tapered steel pipe 5 is supported by two rollers on the support mechanism 2, so that the support area on the roller is stably fitted with the outer wall of the tapered steel pipe 5, and the tapered steel pipe 5 is supported by rollers whose outer wall taper is the same as that of the tapered steel pipe 5, so that it can be ensured that after the tapered steel pipe 5 is supported, the tapered steel pipe 5 is in a horizontal state, so that when the two tapered steel pipes 5 are welded, the two tapered steel pipes 5 can be kept in a horizontal state for welding, solving the problem of being difficult to keep in a horizontal state for butt welding due to the shape of the tapered steel pipe 5, and when it is necessary to butt weld tapered steel pipes 5 with different tapers, the angle of the roller can be adjusted to the angle at which the support area can fit with the outer wall of the tapered steel pipe 5, so that it can stably support the tapered steel pipes 5 with different tapers, so as to ensure that the tapered steel pipe 5 can be kept in a horizontal state for welding during welding.

[0034] For further information, please refer to the attached manual. Figure 2 The support mechanism 2 also includes a base 21, a screw rod 22 is arranged on the base 21, two slide seats 23 are slidably arranged on the base 21, the two slide seats 23 are both threadedly connected to the screw rod 22, and two support components 24 are respectively arranged on the corresponding slide seats 23.

[0035] It should be noted that two sets of external threads are provided on the screw rod 22, and the two sets of external threads have the same pitch and opposite rotation direction, and the screw rod 22 can be driven by a hand wheel or a motor. By driving the screw rod 22 to rotate, it is connected with the thread of the screw rod 22 through the slide seat 23, and the distance between the two support components 24 is adjusted, so that it can be suitable for supporting tapered steel pipes 5 of different diameters.

[0036] The present invention proposes a specific adjustment mechanism. For details, refer to the attached manual. Figure 3 The adjusting mechanism is an adjusting component 3, which includes a rotatably arranged connecting shaft 31, on which a supporting roller 32 is detachably mounted, and the supporting roller 32 includes two supporting plates 1, and a positioning hole 311 is provided on the connecting shaft 31, and positioning shafts 321 are provided on both supporting plates 1, and the supporting plate 1 is positioned and mounted on the connecting shaft 31 through the positioning shaft 321 and the positioning hole 311, and a side plate 33 is installed on the connecting shaft 31, and a fastener 34 is provided on the side plate 33, and the supporting plate 1 is fixedly mounted on the connecting shaft 31 through the fastener 34.

[0037] It should be noted that the fastener 34 is a bolt. When it is necessary to support the tapered steel pipe 5 with different tapers, the bolts can be removed to disassemble the support roller 32 composed of two support plates, and a new support roller 32 that is compatible with the taper of the tapered steel pipe 5 can be replaced. The new support roller 32 is installed and fixed, so that it can be adjusted according to the tapered steel pipe 5 with different tapers, and the support roller 32 can be disassembled and replaced to adjust the taper of the support area, so as to support the tapered steel pipe 5 with different tapers.

[0038] In the above technical solution, although the effect of adjusting the taper of the support area can be achieved by replacing the support roller 32 through disassembly and replacement, when welding a large-diameter thick-walled steel pipe, in order to ensure its stable support, the support roller 32 is required to have a large weight. However, when replacing the support roller 32, too much manual operation is often required, and the manual labor intensity is high. In addition, due to the heavy weight of the support roller 32, it is easy to cause safety accidents during the manual operation. For this reason, the present invention also proposes a specific structure of the adjustment mechanism. For details, refer to the attached manual description. Figure 4 The adjusting mechanism is an adjusting component 24, the adjusting component 24 includes a supporting roller 241, the supporting roller 241 includes a plurality of supporting plates 2, a fastener 242 is provided on the connecting shaft 31, the plurality of supporting plates 2 are fixedly mounted on the connecting shaft 31 by the fastener 242, and the outer wall tapers of the plurality of supporting plates 2 are different, a power component 43 is installed on the slide seat 23, and the output end of the power component 43 is fixedly connected to the connecting shaft 31.

[0039] It should be noted that the fastener 42 is a bolt, the power component 43 is a motor, and the support roller 41 is composed of a plurality of support plates 2 with outer walls of different tapers. When it is necessary to support the conical steel pipe 5 with different tapers, the support roller 41 is driven by the motor to rotate, so that the support area of ​​the support plate 2 with the corresponding taper corresponds to the conical steel pipe 5, and the conical steel pipe 5 is stably supported.

[0040] In the above technical scheme, since the conical steel pipe 5 is set with a large diameter and thick wall, it is usually placed by hoisting equipment. Therefore, when placing the conical steel pipe 5, it is difficult to ensure that the two conical steel pipes 5 are placed exactly in the predetermined position. The predetermined position is that the two conical steel pipes 5 are butt-jointed. After the butt-jointed placement is completed, the welding operation can be carried out. For this reason, the present invention also proposes a positioning mechanism 6, which is used to push the conical steel pipe 5 after the conical steel pipe 5 is placed, so that the conical steel pipe 5 is in the predetermined position, and then welding is carried out.

[0041] For further information, please refer to the attached manual. Figure 5A positioning mechanism 6 is provided on the frame 1, and the positioning mechanism 6 includes a driving member 61. A threaded shaft 62 is installed at the output end of the driving member 61. A push plate 63 is slidably provided on the frame 1. The push plate 63 is threadedly connected with the threaded shaft 62. A guide rail 64 is provided on the frame 1. The push plate 63 is slidably provided on the guide rail 64. The push plate 63 is used to push the conical steel pipe 5 to move.

[0042] It should be noted that there are two groups of positioning mechanisms 6, and the two groups of positioning mechanisms 6 are used to push and move a conical steel pipe 5 respectively. The driving member 61 is a motor, which drives the threaded shaft 62 to rotate, so that it is connected with the threaded shaft 62 through the push plate 63, so that the push plate 63 can slide on the frame 1 and push the conical steel pipe 5 to move through the push plate 63.

[0043] However, in the above technical solution, when butt welding two tapered steel pipes 5, in order to improve the quality of the weld during welding, it is usually necessary to leave a certain gap between the two tapered steel pipes 5. The gap can help the welding molten pool to flow better and make the welding metal evenly distributed, thereby improving the density and strength of the weld and reducing the occurrence of defects (such as pores, inclusions, etc.). In addition, during the welding process, the tapered steel pipe 5 will expand due to heating. The gap left can better adapt to the stress caused by temperature changes and reduce deformation and stress concentration after welding. In addition, a proper gap can make the welding material better fill the joint, forming a better welded joint and improving the strength of the connection. Normally, when welding a cylindrical steel pipe, due to its cylindrical shape, the The surface is set horizontally, so when welding, it is only necessary to drive a certain gap between the two cylindrical steel pipes to ensure the welding quality. However, since the surface of the support component 24 supporting the tapered steel pipe 5 has a taper that matches the tapered steel pipe 5, and since the tapered steel pipe 5 has a taper on the surface, and since the tapered steel pipe 5 is set with a large diameter and thick wall, the weight of the tapered steel pipe 5 is relatively large. After the tapered steel pipe 5 is moved to a predetermined position, it is easy for the tapered steel pipe 5 to slip, causing the gap between the two tapered steel pipes 5 to become smaller, and even causing the two tapered steel pipes 5 to fit together without the problem of a gap. For this reason, the present invention also proposes a gap separation mechanism 7, by setting a partition 73 between the two tapered steel pipes 5 to ensure a gap between the two tapered steel pipes 5.

[0044] For details, please refer to the attached manual. Figure 7 A gap separation mechanism 7 is provided on the frame 1, and the gap separation mechanism 7 includes a fixing ring 71, which is fixedly mounted on the frame 1, and a driving member 72 is mounted on the fixing ring 71. A partition plate 73 is mounted on the output end of the driving member 72, and the partition plate 73 is located between the two tapered steel pipes 5, and the two tapered steel pipes 5 are both in close contact with the partition plate 73.

[0045] It should be noted that the gap separation mechanism 7 includes multiple groups, which are evenly arranged in the circumferential direction of the fixed ring 71. The second driving member 72 is a cylinder. Before the conical steel pipe 5 is moved by the positioning mechanism 6, the partition 73 is driven by the cylinder to move, and the partition 73 is moved between the two conical steel pipes 5. After the conical steel pipe 5 moves to the predetermined position, the partition 73 is between the two conical steel pipes 5, and the thickness of the partition 73 is equal to the gap size, which can ensure that welding is carried out after the gap is formed between the two conical steel pipes 5, thereby ensuring the welding quality.

[0046] In the above technical solution, a partition 73 is provided between the two tapered steel pipes 5 to provide a gap between the two tapered steel pipes 5 to ensure the welding quality. However, during welding, a plurality of points are usually welded between the two tapered steel pipes 5 before the overall welding operation is performed. However, during the overall welding operation, the presence of the partition 73 will interfere with the welding operation. Therefore, the partition 73 needs to be removed after the welding of the plurality of points is completed. However, since the partition 73 is tightly attached between the two tapered steel pipes 5, when the partition 73 is removed, the friction between the partition 73 and the tapered steel pipe 5 during the contact may easily cause the end of the tapered steel pipe 5 to wear. , and it is easy to cause worn debris to fall on the welding position, affecting the welding quality. For this reason, the present invention sets the partition 73 as two synchronously and antagonistically movable abutment plates 731, and the two abutment plates 731 are respectively in close contact with the corresponding conical steel pipes 5, so that before welding, the two abutment plates 731 are driven to move synchronously and antagonistically to separate the two abutment plates 731 from the corresponding conical steel pipes 5, and then the two abutment plates 731 are driven to move out of the welding track, so that the problem of wear on the end of the conical steel pipe 5 caused by contact friction when the partition 73 is removed is avoided. In addition, the present invention further proposes a driving mechanism 8 for driving the two abutment plates 731 to move synchronously and antagonistically.

[0047] For details, please refer to the attached manual. Figure 8 and Fig. 9 The welding device also includes a driving mechanism 8, which includes a fixed seat 81, which is installed at the output end of the driving member 72, and two abutment plates 731 are slidably arranged in the fixed seat 81, a driving shaft 82 is installed on the fixed seat 81, an elliptical wheel 83 is fixedly arranged on the driving shaft 82, and the driving shaft 82 is used to drive the elliptical wheel 83 to rotate, the elliptical wheel 83 is in active contact with the two abutment plates 731, and an elastic member 84 is arranged between the two abutment plates 731.

[0048] It should be noted that the drive shaft 82 can be driven by a motor, and the elastic member 84 is a spring. Figure 8In the process, the spring is in a stretched state, and the driving shaft 82 is driven by the motor to rotate, so that the driving shaft 82 drives the elliptical wheel 83 to rotate, so that the elliptical wheel 83 is separated from the two abutment plates 731, and the spring is gradually restored, so that the two abutment plates 731 are separated from the corresponding conical steel pipes 5, and then the two abutment plates 731 can be driven away from the conical steel pipe 5 by the driving member 2 72.

[0049] For further information, please refer to the attached manual. Fig.10 The welding mechanism 9 includes a driving member 91, which is mounted on the fixed ring 71. A gear 92 is mounted on the output end of the driving member 91. A gear ring 93 is rotatably arranged on the fixed ring 71. The gear 92 is meshed with the gear ring 93. A connecting plate 94 is fixedly mounted on the gear ring 93. A welding gun 95 is mounted on the connecting plate 94. The welding end of the welding gun 95 points to the welding track between the two tapered steel pipes 5.

[0050] It should be noted that the driving member 3 91 is a motor, which drives the gear 92 to rotate, so that the gear 92 drives the gear ring 93 to rotate. The rotation of the gear ring 93 can drive the welding gun 95 to make a circular motion and weld the two tapered steel pipes 5.

[0051] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A large diameter thick wall steel pipe welding device for inverted siphon construction, characterized in that: include: A frame (1), wherein two sets of supporting mechanisms (2) are arranged on the frame (1), and the supporting mechanisms (2) are used to position and support the tapered steel pipe (5); The support mechanism (2) comprises two support assemblies (24) that can move synchronously in opposite directions, the tapered steel pipe (5) is supported by the two support assemblies (24), and the contact position between the support assemblies (24) and the tapered steel pipe (5) is a support area, and the support area has the same taper as the outer wall of the tapered steel pipe (5), so that the tapered steel pipe (5) can be in a horizontal state; The support assembly (24) is also provided with an adjustment mechanism, the adjustment mechanism being used to adjust the taper of the support area so as to support tapered steel pipes (5) of different tapers; The frame (1) is also provided with a welding mechanism (9), the welding mechanism (9) comprising a welding gun (95) movable along a welding track, the welding gun (95) being used to weld two tapered steel pipes (5) along the welding track.

2. A large diameter thick wall steel pipe welding device for inverted siphon construction according to claim 1, characterized in that: The support mechanism (2) further comprises a base (21), a screw rod (22) being arranged on the base (21), two slide seats (23) being slidably arranged on the base (21), the two slide seats (23) being threadedly connected to the screw rod (22), and two support assemblies (24) being respectively arranged on corresponding slide seats (23).

3. A large diameter thick wall steel pipe welding device for inverted siphon construction according to claim 2, characterized in that: The adjustment mechanism is an adjustment component one (3), and the adjustment component one (3) comprises a rotatably arranged connecting shaft (31), and a supporting roller one (32) is detachably mounted on the connecting shaft (31).

4. A large diameter thick wall steel pipe welding device for inverted siphon construction according to claim 3, characterized in that: The support roller (32) comprises two support plates (31), a positioning hole (311) is provided on the connecting shaft (31), and a positioning shaft (321) is provided on each of the two support plates (31), and the support plate (31) is positioned and mounted on the connecting shaft (31) through the positioning shaft (321) and the positioning hole (311), and a side plate (33) is mounted on the connecting shaft (31), and a fastener (34) is provided on the side plate (33), and the support plate (31) is fixedly mounted on the connecting shaft (31) through the fastener (34).

5. A large diameter thick wall steel pipe welding device for inverted siphon construction according to claim 4, characterized in that: The adjustment mechanism is an adjustment component 2 (4), the adjustment component 2 (4) comprises a support roller 2 (41), the support roller 2 (41) comprises a plurality of support plates 2, a fastener 2 (42) is provided on the connecting shaft (31), the plurality of support plates 2 are fixedly mounted on the connecting shaft (31) via the fastener 2 (42), and the tapers of the outer walls of the plurality of support plates 2 are all different, a power component (43) is mounted on the slide seat (23), and the output end of the power component (43) is fixedly connected to the connecting shaft (31).

6. A large diameter thick wall steel pipe welding device for inverted siphon construction according to claim 5, characterized in that: The frame (1) is provided with a positioning mechanism (6), the positioning mechanism (6) comprising a driving member (61), the output end of the driving member (61) being provided with a threaded shaft (62), a push plate (63) being slidably provided on the frame (1), the push plate (63) being threadably connected to the threaded shaft (62), a guide rail (64) being provided on the frame (1), the push plate (63) being slidably provided on the guide rail (64), and the push plate (63) being used to push the conical steel pipe (5) to move.

7. A large diameter thick wall steel pipe welding device for inverted siphon construction according to claim 6, characterized in that: The frame (1) is provided with a gap separation mechanism (7), the gap separation mechanism (7) comprising a fixing ring (71), the fixing ring (71) being fixedly mounted on the frame (1), a second driving member (72) being mounted on the fixing ring (71), a partition plate (73) being mounted at an output end of the second driving member (72), the partition plate (73) being located between the two tapered steel pipes (5), and the two tapered steel pipes (5) being in close contact with the partition plate (73).

8. A large diameter thick wall steel pipe welding device for inverted siphon construction according to claim 7, characterized in that: The partition plate (73) comprises two abutment plates (731) that can move synchronously in opposite directions. The two abutment plates (731) are respectively in close contact with the corresponding conical steel pipes (5). The two abutment plates (731) are separated from the corresponding conical steel pipes (5) through the synchronous opposite direction movement of the two abutment plates (731), and then the two abutment plates (731) are driven to move out of the welding track.

9. A large diameter thick wall steel pipe welding device for inverted siphon construction according to claim 8, characterized in that: The welding device further comprises a driving mechanism (8), the driving mechanism (8) comprising a fixed seat (81), the fixed seat (81) being mounted on the output end of the second driving member (72), and the two abutment plates (731) being slidably arranged in the fixed seat (81), a driving shaft (82) being mounted on the fixed seat (81), an elliptical wheel (83) being fixedly arranged on the driving shaft (82), the driving shaft (82) being used to drive the elliptical wheel (83) to rotate, the elliptical wheel (83) being in active contact with the two abutment plates (731), and an elastic member (84) being arranged between the two abutment plates (731).

10. A large diameter thick wall steel pipe welding device for inverted siphon construction according to claim 9, characterized in that: The welding mechanism (9) comprises a driving member three (91), the driving member three (91) being mounted on a fixing ring (71), a gear (92) being mounted on the output end of the driving member three (91), a gear ring (93) being rotatably arranged on the fixing ring (71), the gear (92) being meshed with the gear ring (93), a connecting plate (94) being fixedly mounted on the gear ring (93), the welding gun (95) being mounted on the connecting plate (94), the welding end of the welding gun (95) being directed toward a welding track between the two tapered steel pipes (5).

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