Steel bifurcated pipe manufacturing device and manufacturing method

Abstract

The present application relates to a kind of steel bifurcated pipe manufacturing device and manufacturing method, by being welded after forming whole to steel bifurcated pipe, installation is on rotary device, the main pipe central axis of steel bifurcated pipe can be matched with the rotary center line of rotary device, steel bifurcated pipe can be rotated around the main pipe central axis, further make the annular weld of the main pipe of steel bifurcated pipe can be rotated around the main pipe central axis, the arc weld between the main pipe of steel bifurcated pipe and branch pipe can be arc-shaped around the main pipe central axis rotation, it can be directly welded to the annular weld and arc weld of rotation by welder or welding device, compared with artificial welding, its welding efficiency is higher, manual strength is smaller, and the present scheme does not need welding device to move along the track of annular weld and arc weld, need not to set corresponding welding track, by controlling the rotation speed of weld, realize the efficient welding of steel bifurcated pipe construction site or in hole.

Description

Technical Field

[0001] This invention relates to the field of steel branch pipe manufacturing technology, and in particular to a steel branch pipe manufacturing apparatus and manufacturing method. Background Technology

[0002] A steel branch pipe consists of a main pipe and two branch pipes. Typically, the main pipe and the two branch pipes are formed by aligning pre-welded annular pipe sections and welding annular welds. Then, arc-shaped welds are made between the main pipe and the two branch pipes, and between the two branch pipes themselves, to form the steel branch pipe. Current steel branch pipe welding processes largely rely on manual electrode welding, with a small portion using gas-shielded welding. This generates arc light and smoke pollution, and manual welding is prone to defects. Generally, the pipes are manufactured and inspected in the factory before being transported to the site for installation. This method carries relatively lower risks regarding quality and schedule. For example, if welding quality problems are discovered on-site, they are difficult to address. Factory production and pre-inspection allow for timely replacement and remediation, reducing project risk. However, large steel branch pipes manufactured in the factory and subjected to hydrostatic testing require larger transport roads, bridges, and tunnels due to their larger dimensions and weight. This leads to a significant increase in project investment as the overall size of the steel branch pipe increases. Summary of the Invention

[0003] The purpose of this invention is to address the problems of high labor intensity, low welding efficiency, and high transportation investment associated with the conventional method of welding steel branch pipes in factories. This invention provides a steel branch pipe manufacturing device and method that enables the manufacture of (ultra) large steel branch pipes on the construction site.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A steel branch pipe manufacturing apparatus includes a slewing device and a driving mechanism. The slewing device is used to support the steel branch pipe and has a rotation center line that corresponds to the central axis of the main pipe of the steel branch pipe. The driving mechanism can drive the steel branch pipe to rotate around the rotation center line.

[0006] In this scheme, the rotation center line of the rotary device refers to the center line on which the component to be processed is mounted on the rotary device and can achieve rotary motion with the help of the rotary device.

[0007] In this solution, the steel branch pipes are spot-welded to form a whole and installed on a rotating device. This allows the central axis of the main pipe of the steel branch pipe to align with the rotation center line of the rotating device, enabling the steel branch pipe to rotate around the central axis of the main pipe. A drive mechanism drives the steel branch pipe to rotate around the rotation center line, allowing the annular weld of the main pipe to rotate around its central axis. Furthermore, the arc-shaped weld between the main pipe and the branch pipe can rotate in an arc around the central axis of the main pipe. This allows for direct welding of the rotating annular and arc-shaped welds by welders or welding equipment. Compared to manual welding, this method offers higher welding efficiency and lower labor intensity. Moreover, this solution eliminates the need for the welding equipment to move along the trajectory of the annular and arc-shaped welds, eliminating the need for corresponding welding tracks. Furthermore, by controlling the rotation speed of the welds, the welding quality and speed can be better controlled.

[0008] Preferably, the rotary device includes a rotary support on one side and a rotating support on the other side, the rotary support and the rotating support forming the rotation center line, and the drive mechanism can drive the rotary support to rotate around the rotation center line.

[0009] The slewing support and the steel branch pipe rotate together as a whole.

[0010] Preferably, the rotating bracket supports the main pipe, and the slewing bracket supports the two branch pipes of the steel branch pipe, which can better ensure the rotational stability of the steel branch pipe.

[0011] Preferably, the slewing bracket is used to abut against the outer side of the crescent rib between the two branch pipes, which facilitates installation and can better ensure the stability of the slewing bracket's support for the steel branch pipe when it rotates, ensuring that the steel branch pipe can continuously follow the slewing bracket's rotation.

[0012] Preferably, the rotary support includes a first support and second supports located at both ends of the first support. The first support has an arc-shaped support surface adapted to the curvature of the crescent rib. The second support has a first support surface located in the middle and second support surfaces located on both sides of the first support surface. The first support surface is used to support the crescent rib, and the second support surface is used to support the corresponding branch pipe.

[0013] The aforementioned slewing support structure can simultaneously support two branch pipes and the crescent rib between them, ensuring stable support for the steel branch pipe and guaranteeing stable slewing motion of the steel branch pipe and the slewing support together.

[0014] Preferably, the rotating bracket is a roller frame, which is used to radially support the main pipe;

[0015] or,

[0016] The rotating support includes a base and a slewing support frame. The slewing support frame is rotatably mounted on the base. The rotation center of the slewing support frame is located at the rotation center line. The slewing support frame is used to radially support the inner side of the main pipe.

[0017] When the rotating support uses a roller frame, it is supported at the bottom of the main pipe. When the steel branch pipe rotates, the main pipe of the steel branch pipe rotates above the roller frame. The roller frame is equivalent to the rotation guide device of the main pipe. Due to the load-bearing capacity limitation of the roller frame, it is more suitable for the rotation of smaller steel branch pipes.

[0018] When the rotating support includes a base and a slewing support frame, the slewing support frame is radially supported on the inner side of the main pipe, and the base provides the rotation center for the slewing support frame, which can rotate together with the steel branch pipe. When the dimensions of the base and the slewing support frame are large, and the height of the base is sufficient, it can provide the support force required for the steel branch pipe to rotate, thus satisfying the rotational movement of large steel branch pipes.

[0019] Preferably, the base is provided with a main body, the main body has a horizontally arranged main body pivot, and the rotary support frame is connected to the main body pivot.

[0020] The main body can be a motor reducer, a hydraulic motor, or a turntable, which can realize the rotation of the slewing support frame and the steel branch pipe, and can also drive the rotation of the slewing support frame and the steel branch pipe.

[0021] Preferably, the drive mechanism includes a fixed part and a rotating part, the rotating part is provided with a rotating shaft, the rotating shaft can move or extend along its axial direction, and the rotating shaft is connected to the rotary bracket.

[0022] By moving or extending the shaft along its axial direction, it is easy to make the slewing support and the steel branch pipe close together, so that the slewing support and the steel branch pipe can rotate together.

[0023] Preferably, the slewing device can adjust the height of the slewing center line. Raising the slewing center line of the slewing device allows the steel branch pipe to have vertical space for rotation, while lowering the slewing center line of the slewing device facilitates the installation of the steel branch pipe on the slewing device.

[0024] Preferably, the steel branch pipe manufacturing device further includes a welding device, which is a welding robot or an automatic welding machine capable of automated welding.

[0025] A method for manufacturing a steel branch pipe, using the aforementioned steel branch pipe manufacturing apparatus, includes the following steps:

[0026] S1. Spot weld the weld seam of the steel branch pipe and install it on the rotary device;

[0027] S2. Drive the steel branch pipe to rotate around the rotation center line of the rotating device through the driving mechanism, and at the same time weld the circumferential weld of the main pipe of the steel branch pipe or weld the arc weld between the main pipe and the branch pipe of the steel branch pipe through the welding device.

[0028] The steel branch pipe manufacturing method of this application involves spot welding the weld seams of the steel branch pipe to form an integral steel branch pipe, enabling the steel branch pipe to rotate as a whole around the rotation center line. Furthermore, the circumferential weld seam of the main pipe and the arc weld seam between the main pipe and the branch pipe are quickly welded by a welding device, which can improve the welding speed of the steel branch pipe and reduce the intensity of manual labor.

[0029] Preferably, the welding quality of the corresponding weld is inspected online while the steel branch pipe is rotating around the rotation center line, or the quality inspection is carried out after the corresponding weld is completed.

[0030] As the steel branch pipe rotates around the center line, the welding quality inspection of the corresponding welds becomes more convenient. Most of the welding can be performed using efficient submerged arc automated welding on the top of the outer wall and the bottom of the inner wall of the steel branch pipe, without arc light or smoke pollution.

[0031] The steel branch pipe manufacturing apparatus and manufacturing method of this application are used for on-site assembly welding of steel branch pipes, which can realize efficient on-site welding of steel branch pipes, reduce labor intensity, improve work efficiency, and reduce engineering construction costs.

[0032] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0033] 1. The steel branch pipe manufacturing device of the present invention installs the steel branch pipe on a rotating device, enabling the steel branch pipe to rotate around the central axis of the main pipe. This allows the annular weld of the main pipe to rotate around the central axis of the main pipe, and the arc-shaped weld between the main pipe and the branch pipe to rotate in an arc around the central axis of the main pipe. This allows for direct welding of the rotating annular and arc-shaped welds by welders or welding equipment. Compared to manual welding, this method has higher welding efficiency and lower labor intensity. Furthermore, it eliminates the need for the welding equipment to move along the trajectory of the annular and arc-shaped welds, and eliminates the need for corresponding welding tracks. By controlling the rotation speed of the weld, the quality and speed of the welding can be better controlled. The welding environment is also more friendly, enabling high-quality, high-efficiency, and low-labor (ultra-large) steel branch pipe welding on construction sites, ensuring construction safety and reducing project investment.

[0034] 2. The steel branch pipe manufacturing method of the present invention involves spot welding the weld seams of the steel branch pipe to form a complete steel branch pipe, allowing the steel branch pipe to rotate as a whole around a rotation center line. Furthermore, the circumferential weld seam of the main pipe and the arc-shaped weld seam between the main pipe and the branch pipe are rapidly welded using a welding device. This method increases the welding speed of the steel branch pipe, reduces manual labor intensity, and is suitable for the application of efficient submerged arc automatic welding technology. Moreover, the welding quality inspection of the corresponding weld seams is more convenient when the steel branch pipe rotates around the rotation center line.

[0035] 3. The steel branch pipe manufacturing device and manufacturing method described in this application are used for on-site assembly welding of steel branch pipes, realizing mechanized construction and automated efficient welding of (ultra) large steel branch pipes on-site, which is conducive to reducing project investment. Attached Figure Description

[0036] Figure 1 This is an isometric view of the steel branch pipe manufacturing device in Example 1;

[0037] Figure 2 This is a front view schematic diagram of the steel branch pipe manufacturing device in Example 1;

[0038] Figure 3 This is a schematic diagram of the left side of the steel branch pipe manufacturing device in Example 1;

[0039] Figure 4 This is an isometric view of the steel branch pipe being welded using the steel branch pipe manufacturing device in Example 1;

[0040] Figure 5 This is a front view schematic diagram of welding steel branch pipes using the steel branch pipe manufacturing device in Example 1;

[0041] Figure 6 This is a schematic diagram of the left side showing the welding of steel branch pipes using the steel branch pipe manufacturing device in Example 1;

[0042] Figure 7 This is a plan view of welding steel branch pipes using the steel branch pipe manufacturing device in Example 1;

[0043] Figure 8 This is a schematic diagram of the arrangement of the welding device in Example 1;

[0044] Figure 9 This is a side view of the welding device in Example 1;

[0045] Figure 10 This is a schematic diagram of the longitudinal section of the steel branch pipe manufacturing device in Example 1 welding steel branch pipes inside the tunnel.

[0046] Figure 11 yes Figure 10 A schematic diagram of the Sinosteel branch pipe manufacturing equipment inside the tunnel;

[0047] Figure 12 This is an isometric view of the steel branch pipe manufacturing device in Example 2;

[0048] Figure 13 This is a front view schematic diagram of the steel branch pipe manufacturing device in Example 2;

[0049] Figure 14 This is a schematic diagram of the left side of the steel branch pipe manufacturing device in Example 2;

[0050] Figure 15 This is a top view schematic diagram of the steel branch pipe manufacturing device in Example 2;

[0051] Figure 16 This is an isometric view of the steel branch pipe being welded using the steel branch pipe manufacturing device in Example 2;

[0052] Figure 17 This is a schematic diagram of the left side showing the welding of steel branch pipes using the steel branch pipe manufacturing device in Example 2;

[0053] Figure 18 This is a schematic diagram of the arrangement of the welding device in Example 2;

[0054] Figure 19 This is a schematic diagram of the longitudinal section of the steel branch pipe manufacturing device in Example 2 welding steel branch pipes inside the tunnel.

[0055] Figure 20 This is an isometric view of the steel branch pipe manufacturing device in Example 2 welding steel branch pipes inside the tunnel;

[0056] Figure 21 This is a schematic diagram of the cross-section of the steel branch pipe manufacturing device in Example 2 welding the steel branch pipe inside the tunnel.

[0057] Icons: 1-Steel branch pipe; 11-Main pipe; 111-Circumferential weld; 112-Arc weld; 12-Branch pipe; 122-Crescent rib; 2-Roller frame; 21-Base; 22-Roller support; 23-Roller; 3-First drive mechanism; 31-Fixing part; 32-Lifting part; 33-Rotating part; 331-Rotating shaft; 34-Rotating motor; 35-Rotating bracket; 351-First bracket; 352-Arc support surface; 353-The 2-Support bracket; 354-Second support surface; 355-First support surface; 4-Welding device; 41-Column; 42-Crossbeam; 44-Main body; 45-Rotating support frame; 46-Main body rotating shaft; 47-Inner wall support component; 7-Rotating center line; 8-Welding device; 81-Guide rail seat; 82-Guide rail; 91-Temporary rail; 92-Moving wheel; 93-Column; 94-Cantilever beam; 95-Welding base; 96-Sliding connector. Detailed Implementation

[0058] The present invention will now be described in detail with reference to the accompanying drawings.

[0059] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0060] Example 1

[0061] This embodiment provides a steel branch pipe manufacturing apparatus, such as... Figure 1-3 As shown, it includes a slewing device and a drive mechanism. The slewing device is used to support the steel branch pipe 1. The slewing device has a slewing center line 7, which corresponds to the central axis of the main pipe 11 of the steel branch pipe 1. The drive mechanism can drive the steel branch pipe 1 to rotate around the slewing center line 7. Here, the rotation is the steel branch pipe 1 rotating around the slewing center line 7 itself.

[0062] like Figure 2 and Figure 6 As shown, the rotation center line 7 of the rotary device refers to the center line on which the component to be processed is mounted on the rotary device, enabling it to achieve rotary motion.

[0063] In this scheme, the slewing device is any mechanism that enables the entire steel branch pipe 1 to rotate around the slewing center line 7 of the slewing device or the central axis of the main pipe 11 of the steel branch pipe 1.

[0064] In this embodiment, the rotary device includes a rotary support 35 on one side and a rotating support on the other side, such as... Figure 2 As shown, the slewing bracket 35 and the rotating bracket form the rotation center line 7. The driving mechanism can drive the slewing bracket 35 to rotate around the rotation center line 7. That is, when the driving mechanism drives the slewing bracket 35 to rotate around the rotation center line 7, under the support of the slewing bracket 35 on the entire steel branch pipe 1, the slewing bracket 35 drives the entire steel branch pipe 1 to rotate together, so that the weld of the steel branch pipe 1 can rotate. The weld mentioned here for automatic welding is mainly the circumferential weld 111 of the main pipe 11 of the steel branch pipe 1 and the arc weld 112 between the main pipe 11 and the branch pipe 12 of the steel branch pipe 1. Figure 4 and Figure 5 As shown.

[0065] In this embodiment, the slewing device can adjust the height of the slewing center line 7. Raising the slewing center line 7 provides vertical space for the steel branch pipe 1 to rotate, while lowering the slewing center line 7 facilitates the installation of the steel branch pipe 1 on the slewing device. Figure 2As shown, both the left rotating bracket and the right slewing bracket 35 can be adjusted to raise or lower their support positions. When the left rotating bracket and the right slewing bracket 35 are adjusted to raise or lower their support positions simultaneously, the height of the slewing center line 7 can be changed.

[0066] In this embodiment, as Figure 1-3 As shown, the rotating bracket is a roller frame 2, which is used to radially support the main pipe 11. Figure 3 The dashed circle in the diagram indicates the main pipe 11 supported by the roller frame 2. When the rotating support uses the roller frame 2, it is supported at the bottom of the main pipe 11. When the steel branch pipe 1 rotates, the main pipe 11 of the steel branch pipe 1 rotates above the roller frame 2. The roller frame 2 acts as a rotation guide device for the main pipe 11. Due to the load-bearing capacity limitation of the roller frame 2, it is more suitable for the rotation of smaller steel branch pipes 1. Specifically, as shown... Figure 3 As shown, the roller frame 2 includes a base 21 with an arc-shaped upper surface. A roller support 22 is hinged to each of the left and right ends of the base 21. The roller support 22 has a rotatable roller 23 at its end. The roller 23 and the roller support 22 rotate in the same direction. By swinging the roller support 22 in the vertical direction along the base 21, the support height of the roller support 22 can be adjusted, so as to adapt to the support of the main pipe 11 of different sizes when it rotates, and to facilitate the installation of the steel branch pipe 1.

[0067] To better ensure the rotational stability of steel branch pipe 1, such as Figure 4 and Figure 7 As shown, the rotating bracket is suitable for supporting the main pipe 11, and the slewing bracket 35 supports the two branch pipes 12 of the steel branch pipe 1. The slewing bracket 35 is appropriately positioned to abut against the outer side of the crescent rib 122 between the two branch pipes 12, facilitating installation and ensuring better stability of the slewing bracket 35's support for the steel branch pipe 1 during rotation, thus ensuring that the steel branch pipe 1 can continuously rotate with the slewing bracket 35.

[0068] In this embodiment, as Figure 1 , Figure 2 and Figure 7As shown, the slewing support 35 includes a first support 351 and second supports 353 located at both ends of the first support 351. The first support 351 has an arc-shaped support surface 352 adapted to the curvature of the crescent rib 122. The second support 353 has a first support surface 355 located in the middle and second support surfaces 354 located on both sides of the first support surface 355. The first support surface 355 is used to support the crescent rib 122, and the second support surface 354 is used to support the corresponding branch pipe 12. By simultaneously adapting and supporting two branch pipes 12 and the crescent rib 122 between the two branch pipes 12, stable support for the steel branch pipe 1 can be ensured, ensuring that the steel branch pipe 1 and the slewing support 35 perform stable slewing motion together. Figure 7 As can be seen from the vertical direction, the width of the first support surface 355 is wider than the width of the crescent rib 122, so that there is a gap between the first support surface 355 and the outer wall of the two branch pipes 12, which can leave the weld between the crescent rib 122 and the two branch pipes 12 at the support of the rotating bracket 35, making it convenient to weld the weld at the crescent rib 122.

[0069] like Figure 2 As shown, the drive mechanism includes a fixed part 31, a lifting part 32 and a rotating part 33. The rotating part 33 is equipped with a rotating motor 34. The rotating motor 34 has a rotating shaft 331. The rotating shaft 331 can move or extend along its axial direction. The rotating shaft 331 is connected to the rotary support 35.

[0070] The lifting part 32 can drive the rotating part 33 to rise and fall, adjusting the height of the rotating shaft 331. This, in turn, can be combined with the adjustment of the support height of the roller support 22 to achieve the height adjustment of the rotation center line 7, facilitating the installation of the steel branch pipe 1 on the rotating device. By moving or extending the rotating shaft 331 along its axial direction, it is easy to make the rotating support 35 and the steel branch pipe 1 abut together, so that the rotating support 35 and the steel branch pipe 1 can rotate together.

[0071] like Figure 2 As shown, the rotation shaft 331 can be moved to the right or shortened to the right to increase the support distance on both sides, thereby preventing the slewing bracket 35 from abutting the steel branch pipe 1, facilitating the installation of the steel branch pipe 1. When the steel branch pipe 1 needs to rotate, the rotation shaft 331 is moved to the left or extended to the left, causing the slewing bracket 35 to press against the steel branch pipe 1, so that the central axis of the main pipe 11 of the steel branch pipe 1 can correspond to the rotation center line 7 of the slewing device, thereby allowing the steel branch pipe 1 to rotate around the central axis of the main pipe 11. Figures 4-7As shown. By rotating the motor 34 to control the rotation of the shaft 331, the rotating bracket 35 drives the entire steel branch pipe 1 to rotate together. This allows the annular weld 111 of the main pipe 11 of the steel branch pipe 1 to rotate around the central axis of the main pipe 11, and also allows the arc weld 112 between the main pipe 11 and the branch pipe 12 to rotate in an arc around the central axis of the main pipe 11. This allows the rotating annular weld 111 and arc weld 112 to be welded directly by a welder or welding equipment. Compared with manual welding, this method has higher welding efficiency and lower labor intensity. Furthermore, this solution does not require the welding equipment to move along the trajectory of the annular weld 111 and arc weld 112, and does not require the setting of corresponding welding tracks. By controlling the rotation speed of the weld, the welding quality and welding speed can be better controlled.

[0072] like Figure 8 and Figure 9 As shown, the steel branch pipe manufacturing device also includes a welding device 8, which is a welding robot or an automatic welding machine capable of automated welding. For example, using submerged arc welding equipment allows for efficient welding and corresponding welding inspection. Furthermore, on the same side of the first drive mechanism 3 and the roller frame 2, for example... Figure 8 A guide rail seat 81 is provided on the left side, and a guide rail 82 is provided on the guide rail seat 81. The guide rail 82 is arranged along the axial direction of the main pipe 11, so that the welding device 8 can move along the guide rail 82 to different axial positions corresponding to the main pipe 11. Moreover, the welding device 8 can adopt different degrees of freedom, thus facilitating the welding of the weld seam of the steel branch pipe. Figure 8 As shown, the welding device 8 is capable of automatically welding the circumferential weld 111 of the main pipe 11 and the arc weld 112 between the main pipe 11 and the branch pipe 12.

[0073] Example 2

[0074] This embodiment provides a steel branch pipe manufacturing apparatus, which differs from Embodiment 1 in that the rotating support is different. In Embodiment 1, the rotating support is a roller frame 2, mainly providing radial support at the bottom, offering support and rotational guidance for the main pipe 11 of the steel branch pipe; while in this embodiment, the rotating support is a welding device 4, such as... Figures 12-15 The rotating support includes a base and a slewing support frame 45, the slewing support frame 45 being rotatably mounted on the base. Figure 14 As shown, the rotation center of the slewing support frame 45 is located on the rotation center line 7. Figure 17 As shown, the slewing support frame 45 is used to radially support the inner side of the main pipe 11. The slewing support frame 45 can rotate together with the steel branch pipe 1. When the size of the base and the slewing support frame 45 is large and the height of the base is sufficient, it can provide the support force required for the steel branch pipe 1 to rotate, thus satisfying the rotational movement of the large steel branch pipe 1.

[0075] like Figure 13 As shown, the base includes four uprights 41 and four crossbeams 42. The four uprights 41 are arranged in a rectangular shape, and the crossbeams 42 are connected to the four uprights 41. A main body 44 is mounted on the crossbeams 42. The main body 44 has a horizontally arranged main body pivot 46. The slewing support frame 45 is connected to the main body pivot 46, and the outer end of the slewing support frame 45 is provided with an inner wall support member 47, so that it can be stably supported on the inner wall of the main pipe 11 of the steel branch pipe 1, ensuring that the slewing support frame 45 and the steel branch pipe 1 can rotate together around the central axis of the main pipe 11 or around the rotation center line 7. The main body 44 can be a motor reducer, a hydraulic motor, or a turntable, which can realize the rotation of the slewing support frame 45 and the steel branch pipe 1, and can also drive the rotation of the slewing support frame 45 and the steel branch pipe 1.

[0076] When using, you can Figure 12 The drive mechanism on the right serves as the first drive mechanism 3, and the main body 44 serves as the second drive mechanism. The first drive mechanism 3 and the second drive mechanism can be used simultaneously, or only one of them can be used. When the first drive mechanism 3 and the second drive mechanism are used simultaneously, one of them can be used as the main power mechanism.

[0077] In addition, the column 41 is a telescopic structure, which means that the height of the crossbeam 42 can be adjusted up and down, thereby adjusting the height of the slewing support frame 45. This can be coordinated with the lifting and lowering of the first drive mechanism 3 on the right side, making the installation of the steel branch pipe 1 more convenient and ensuring the slewing space of the steel branch pipe 1.

[0078] The steel branch pipe manufacturing apparatus described in this embodiment can also be used to weld the steel branch pipe 1 applicable to Embodiment 1. Furthermore, because it employs the welding assembly device 4, which supports the inner wall of the main pipe 11 from the inside, the support effect is better, ensuring better support for the inner wall of the main pipe 11. This ensures that the rotating support frame 45 and the steel branch pipe 1 can rotate together. It also has a second drive mechanism, enabling it to be used to weld larger-sized steel branch pipes 1, such as those with a main pipe diameter greater than 14m, thus broadening its applicability.

[0079] like Figure 18 and Figure 19As shown, the steel branch pipe manufacturing device also includes a welding device 8, which is a welding robot or an automatic welding machine capable of automated welding. For example, using submerged arc welding equipment allows for efficient welding and corresponding welding inspection. Guide rail seats 81 are provided on the top of the first drive mechanism 3 and the top of the welding assembly device 4. Guide rails 82 are mounted on the guide rail seats 81, and the guide rails 82 are arranged along the axial direction of the main pipe 11. This allows the welding device 8 to move along the guide rails 82 to different axial positions corresponding to the main pipe 11, and the welding device 8 can employ different degrees of freedom, thus facilitating the welding of the steel branch pipe welds. The guide rail seats 81 are located on top of the first drive mechanism 3 and the welding assembly device 4, and their height can be changed by raising and lowering the lifting part of the first drive mechanism 3 and the column of the welding assembly device 4, ensuring that the guide rails 82 are always directly above the steel branch pipe. Furthermore, when the steel branch pipe is large, this arrangement eliminates the need to set the guide rail seats 81 very high, saving materials and facilitating the use of the welding device 8.

[0080] Example 3

[0081] This embodiment provides a method for manufacturing a steel branch pipe, using the steel branch pipe manufacturing apparatus described in Embodiment 1 or Embodiment 2, and includes the following steps:

[0082] S1. The steel branch pipe manufacturing device is installed at the construction site inside the tunnel;

[0083] S2. Spot weld the weld seam of the steel branch pipe 1 and install it on the rotary device, as follows: Figures 4-7 or Figures 16-17 Specifically, the unit steel structure components of the steel branch pipe 1 are installed on the rotating device for assembly. Depending on the transportation conditions, the unit steel structure components can be single pieces or combinations, tiles, single sections of steel pipe, etc. After assembly and fixing, proceed to step S3.

[0084] S3. The steel branch pipe 1 is driven by a drive mechanism to rotate around the rotation center line 7 of the rotating device. Simultaneously, a welding device welds the circumferential weld 111 of the main pipe 11 of the steel branch pipe 1 or the arc-shaped weld 112 between the main pipe 11 and the branch pipe 12. The welding device 8 can weld both the inner and outer welds of the steel branch pipe 1. Furthermore, while the steel branch pipe 1 rotates around the rotation center line 7, the welding quality of the corresponding weld is inspected online, or after the corresponding weld is completed. Inspecting the welding quality of the corresponding weld is more convenient while the steel branch pipe 1 rotates around the rotation center line 7.

[0085] The steel branch pipe manufacturing method of this application involves spot welding the weld seam of the steel branch pipe 1 to form the whole steel branch pipe 1, so that the steel branch pipe 1 can rotate around the rotation center line 7 as a whole. The circumferential weld seam 111 of the main pipe 11 of the steel branch pipe 1 and the arc weld seam 112 between the main pipe 11 and the branch pipe 12 of the steel branch pipe 1 are welded by an automated welding device 8. This can improve the welding speed of the steel branch pipe 1, reduce the intensity of manual labor, and optimize the tunnel construction process of the steel branch pipe.

[0086] Example 4

[0087] This embodiment provides a method for manufacturing a steel branch pipe, using the steel branch pipe manufacturing apparatus described in Embodiment 1, and includes the following steps:

[0088] S1. Temporary tracks 91, facilitating transportation, are arranged at the main and branch pipe installation locations within the tunnel construction site. Two temporary tracks 91 are laid out longitudinally along the tunnel. Figure 10 and Figure 11 As shown; first install the first drive mechanism 3 of the steel branch pipe manufacturing device;

[0089] S2. Spot weld the weld seam of the steel branch pipe 1 and install it on the roller frame 2, as follows: Figure 4 As shown; specifically, firstly, the support height of the roller frame 2 and the first drive mechanism 3 is lowered to facilitate the installation of the steel branch pipe 1 on the roller frame 2. Then, the fillet weld at the crescent rib 122 between the two branch pipes 12 can be welded first. During welding, the crescent rib 122 is placed between the two branch pipes 12, and the crescent rib 122 between the two branch pipes 12 is welded to the two branch pipes 12 by spot welding. Then, the inner and outer welds of the crescent rib 122 are fully welded by means of submerged arc welding carriage or manual welding. It should be noted that the crescent rib 122 between the two branch pipes 12 is achieved by using a submerged arc welding carriage. When welding the fillet welds, the climbing angle of the submerged arc welding trolley must be less than 30° to ensure the quality of the full weld. When fully welding the fillet welds of the crescent ribs 122 between the two branch pipes 12, weld one side (inner and outer) first, and then weld the other side. For example, weld the outer side first, and then weld the inner side. In addition to fully welding the fillet welds at the crescent ribs 122 between the two branch pipes 12, the remaining welds of the steel branch pipe 1 also need to be spot welded. That is, the unit steel structure components of the steel branch pipe 1 are assembled on the roller frame 2. The unit steel structure components can be single pieces, assemblies, or single sections of steel pipe, depending on the transportation conditions.

[0090] After the steel branch pipe 1 is formed as a whole and installed on the roller frame 2, the axial direction of the main pipe 11 of the steel branch pipe is parallel to the longitudinal direction of the tunnel, and the support height of the roller frame 2 and the first drive mechanism 3 is raised, so that the steel branch pipe is raised as a whole. Then, the steps between steps S2 and S3 are performed: after the main structure of the steel branch pipe is assembled, the transport track and the external mounting bracket are removed to ensure that the steel branch pipe has 360° rotation space. At the same time, the support height of the roller frame 2 and the first drive mechanism 3 is adjusted so that the rotation center line of the steel branch pipe is horizontal. Then, step S3 is performed.

[0091] S3. The first driving mechanism 3 drives the entire steel branch pipe to rotate at a constant speed on the roller frame 2, and the submerged arc automatic welding process is used to perform external weld welding on the top of the steel branch pipe and internal weld welding on the inner wall.

[0092] like Figure 8 As shown, the welding of the outer weld is performed by welding device 8 corresponding to the weld that needs to be welded, such as the corresponding... Figure 8 The annular weld 111 in the middle keeps the welding device 8 stationary and can weld the top of the annular weld 111. During the process of the first drive mechanism 3 driving the steel branch pipe to rotate at a constant speed on the roller frame 2, the annular weld 111 rotates at a constant speed, so that the top of the annular weld 111 changes continuously. The welding device 8 continuously welds the annular weld 111, so that the entire annular weld 111 can be fully welded quickly and with high quality.

[0093] The welding of the inner weld can be performed by extending a robotic arm into the interior of the steel branch pipe 1, similar to the welding of the outer weld; the welding of the inner weld can also be performed automatically using a submerged arc welding carriage, i.e., the submerged arc welding carriage is set up as follows: Figure 8 As shown, at the bottom of the steel branch pipe, and with the submerged arc welding trolley corresponding to the weld seam to be welded, during the process of the steel branch pipe rotating uniformly on the roller frame 2 driven by the first drive mechanism 3, the annular weld seam 111 rotates uniformly. At the same time, the submerged arc welding trolley moves in the opposite direction of the annular weld seam 111, ensuring that the submerged arc welding trolley is always at the bottom, welding the bottom weld point of the annular weld seam 111, thereby completing the full welding of the inner weld seam. Furthermore, the submerged arc welding trolley's position at the bottom ensures that its climbing angle is less than 30°, guaranteeing the quality of the full weld. After the inner and outer weld seams of one annular weld seam 111 are fully welded, the welding device can be moved longitudinally along the guide rail 82 to the next weld seam, such as the next annular weld seam 111 or arc weld seam 112, to weld the inner and outer weld seams of the next weld seam, until all weld seams except the fillet weld seam between the two branch pipes are completely welded.

[0094] In step S2 above, the fillet weld at the crescent rib 122 between the two branch pipes 12 can be tack welded first. After all the inner and outer welds except the fillet weld are welded in step S3, the fillet weld can be fully welded.

[0095] In addition to adopting, such as Figure 8 In addition to welding the steel branch pipe weld seam using the welding device 8 shown, other methods such as... Figure 10 The welding manipulator shown is used to weld the weld seams of the steel branch pipe. From Figure 10 and Figure 11 It can also be seen that the welding manipulator includes a welding base 95, with movable wheels 92 on both sides of the bottom of the welding base 95. The movable wheels 92 on both sides correspond to temporary tracks 91 on both sides of the tunnel bottom. A column 93 is fixed on the top of the welding base 95, and a sliding connector 96 is provided on the top of the column 93. A cantilever beam 94 is slidably connected to the sliding connector 96. The cantilever beam 94 is arranged longitudinally along the tunnel. A welding device is provided at the bottom of the cantilever beam 94. The welding device is located at the top of the annular weld 111 of the main pipe and can continuously weld the top of the annular weld 111. The welding manipulator can move along the temporary tracks 91 via the movable wheels 92.

[0096] After all welds on steel branch pipe 1 are completed, subsequent steps can be carried out on site:

[0097] S4. Use a track roller frame to transport the test caps of the main pipe and branch pipe to the steel branch pipe for welding connection, and then conduct a water pressure test.

[0098] S5. After welding is completed and the weld passes non-destructive testing, prepare for the hydrostatic test.

[0099] S6. Fix the steel branch pipe in the installation position inside the tunnel, remove the steel branch pipe welding equipment, and fill the outer wall with concrete according to the design or water pressure test requirements.

[0100] S7. After flushing and pressure testing, and meeting the design technical requirements, remove the pressure test head.

[0101] The steel branch pipe manufacturing method of this application is suitable for on-site mechanical and automated manufacturing of steel branch pipes in tunnels, using single pieces, assemblies, or single sections of steel pipes for transportation. The weld seams of the steel branch pipe 1 are spot welded to form the entire steel branch pipe 1, allowing the steel branch pipe 1 to rotate as a whole around the rotation center line 7. Furthermore, the circumferential weld seam 111 of the main pipe 11 of the steel branch pipe 1 and the arc weld seam 112 between the main pipe 11 and the branch pipe 12 of the steel branch pipe 1 are welded by an automated welding device 8. This method can improve the welding speed of the steel branch pipe 1, reduce the intensity of manual labor, and optimize the tunnel construction process of the steel branch pipe.

[0102] Example 5

[0103] This embodiment provides a method for manufacturing a steel branch pipe, using the steel branch pipe manufacturing apparatus described in Embodiment 2, and includes the following steps:

[0104] S1. Temporary tracks for transportation are arranged at the main and branch pipe installation locations within the tunnel construction site, and the first drive mechanism 3 and welding device 4 of the steel branch pipe manufacturing device are installed.

[0105] S2. Using a rail trolley to transport individual pieces or tiles, and after assembling and fixing them on the first drive mechanism 3 or welding device 4, spot welding is performed on the weld seams of the steel branch pipe 1, such as... Figures 16-17 Specifically, the installation steps are similar to those in Embodiment 4; and before assembling and fixing the steel branch pipes on the first drive mechanism 3 or welding device 4, the installation is made more convenient by lowering the support of the first drive mechanism 3 or welding device 4.

[0106] After the steel branch pipe 1 is formed as a whole and installed on the welding device 4, as Figures 19-21 As shown, the axial direction of the main pipe of the steel branch pipe is along the longitudinal direction of the tunnel, and the support of the steel branch pipe by the first drive mechanism 3 or the welding device 4 is raised, so that the steel branch pipe is raised as a whole. Then, the steps between steps S2 and S3 are performed: after the main structure of the steel branch pipe is assembled, the rotation center axis between the welding device 4 and the first drive mechanism 3 is adjusted so that the rotation center axis between the welding device 4 and the first drive mechanism 3 is horizontal; then the transport track at the bottom of the steel branch pipe and the external mounting bracket are removed to ensure that the steel branch pipe has 360° rotation space.

[0107] S3. The steel branch pipe is driven to rotate at a constant speed by the welding assembly device 4, and the outer weld is welded at the top of the steel branch pipe and the inner weld is welded on the inner wall; the welding method is similar to step S3 in embodiment 4.

[0108] After all welds on steel branch pipe 1 are completed, subsequent steps can be carried out on site:

[0109] S4. After welding is completed, perform non-destructive testing on the weld.

[0110] S5. The steel branch pipe is fixed in the installation position inside the tunnel, and the bottom of the steel branch pipe is filled with concrete according to the design or water pressure test requirements.

[0111] S6. Use a track-mounted trolley to transport the spherical end caps of the main pipe and branch pipe to the steel branch pipe for welding, and then conduct an on-site water pressure test.

[0112] The steel branch pipe manufacturing method of this application is suitable for on-site mechanical and automated manufacturing of (ultra) large diameter steel branch pipes in tunnels by transporting them as tiles or single structural components. The weld seams of the steel branch pipe 1 are spot welded to form the entire steel branch pipe 1, allowing the steel branch pipe 1 to rotate as a whole around the rotation center line 7. The circumferential weld seam 111 of the main pipe 11 of the steel branch pipe 1 and the arc weld seam 112 between the main pipe 11 and the branch pipe 12 of the steel branch pipe 1 are welded by an automated welding device 8. This method can improve the welding speed of the steel branch pipe 1, reduce the intensity of manual labor, and optimize the tunnel construction process of (ultra) large steel branch pipes.

[0113] The steel branch pipe manufacturing device and method of the present invention enable (ultra) large steel branch pipes to be manufactured on-site, either at the installation site or inside the tunnel. The steel branch pipe rotates along the axis of the main pipe 11, and a robot or submerged arc welding head performs efficient automatic welding according to the weld movement trajectory with the support of an intelligent vision device. This avoids the difficulties of transporting (ultra) large steel branch pipes and manual welding, reduces welding fume and arc light pollution, and realizes mechanized construction, automatic welding and inspection.

[0114] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A steel branch pipe manufacturing apparatus, characterized in that, It includes a slewing device and a drive mechanism. The slewing device is used to support the steel branch pipe (1). The slewing device has a slewing center line (7). The slewing device includes a slewing bracket (35) on one side and a rotating bracket on the other side, such that the slewing bracket (35) and the rotating bracket form the slewing center line (7). The rotating bracket supports the main pipe (11) of the steel branch pipe (1); the slewing bracket (35) supports the two branch pipes (12) of the steel branch pipe (1), and the slewing bracket (35) is used to abut against the outside of the crescent rib (122) between the two branch pipes (12); The rotating bracket (35) includes a first bracket (351) and a second bracket (353) located at both ends of the first bracket (351). The first bracket (351) has an arc-shaped support surface (352) adapted to the curvature of the crescent rib (122). The second bracket (353) has a first support surface (355) located in the middle and second support surfaces (354) located on both sides of the first support surface (355). The first support surface (355) is used to support the crescent rib (122), and the second support surface (354) is used to support the corresponding branch pipe (12). The rotation center line (7) corresponds to the central axis of the main pipe (11) of the steel branch pipe (1). The driving mechanism can drive the steel branch pipe (1) to rotate around the rotation center line (7), so that the annular weld of the main pipe (11) of the steel branch pipe (1) can rotate around the central axis of the main pipe (11), and the arc weld between the main pipe (11) and the branch pipe (12) of the steel branch pipe (1) can rotate in an arc around the central axis of the main pipe (11).

2. The steel branch pipe manufacturing apparatus according to claim 1, characterized in that, The drive mechanism can drive the rotary support (35) to rotate around the rotation center line (7).

3. The steel branch pipe manufacturing apparatus according to claim 1, characterized in that, The rotating bracket is a roller frame (2), which is used to radially support the main tube (11); Alternatively, the rotating support includes a base and a rotating support frame (45), the rotating support frame (45) is rotatably mounted on the base, the rotation center of the rotating support frame (45) is located on the rotation center line (7), and the rotating support frame (45) is used to radially support the inner side of the main tube (11).

4. The steel branch pipe manufacturing apparatus according to claim 3, characterized in that, The base is provided with a main body (44), the main body (44) has a horizontally arranged main body pivot (46), and the rotary support frame (45) is connected to the main body pivot (46).

5. The steel branch pipe manufacturing apparatus according to any one of claims 1-4, characterized in that, The drive mechanism includes a fixed part (31) and a rotating part (33). The rotating part (33) is provided with a rotating shaft (331). The rotating shaft (331) can move or extend along its axial direction. The rotating shaft (331) is connected to the rotary support (35).

6. The steel branch pipe manufacturing apparatus according to any one of claims 1-4, characterized in that, The slewing device can adjust the height of the slewing center line (7).

7. The steel branch pipe manufacturing apparatus according to any one of claims 1-4, characterized in that, Used for on-site welding of steel branch pipes.

8. The steel branch pipe manufacturing apparatus according to any one of claims 1-4, characterized in that, It also includes a welding device (8), which is a welding robot or an automatic welding machine.

9. A method for manufacturing a steel branch pipe, characterized in that, The steel branch pipe manufacturing apparatus as described in any one of claims 1-8 includes the following steps: S1. Spot weld the weld seam of the steel branch pipe (1) and install it on the rotary device of the steel branch pipe manufacturing device; S2. Drive the steel branch pipe (1) to rotate around the rotation center line (7) of the rotating device by the driving mechanism, and at the same time weld the circumferential weld (111) of the main pipe (11) of the steel branch pipe (1) or weld the arc weld (112) between the main pipe (11) and the branch pipe (12) of the steel branch pipe (1) by the welding device (8).

10. The method for manufacturing a steel branch pipe according to claim 9, characterized in that, When the steel branch pipe (1) rotates around the rotation center line (7), the welding quality of the corresponding weld is inspected online, or the quality is inspected after the corresponding weld is completed.

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