Clamping mechanism for pipeline welding

Abstract

The clamping mechanism for pipeline welding is used for clamping a pipeline and comprises a bottom plate, two sliding parts, two clamping assemblies and a first driving part, the two sliding parts are arranged on the same side of the bottom plate side by side in the first direction and both have the freedom degree of sliding in the first direction, and the first direction is the same as the length direction of the bottom plate; the two clamping assemblies correspond to the two sliding parts one to one and are arranged on the sides, away from the bottom plate, of the corresponding sliding parts, each clamping assembly comprises at least two rotary supporting parts and a pressing part, and in the first direction, the pressing part in the same clamping assembly is located between the at least two rotary supporting parts; the first driving part is connected with the rotary supporting parts in a penetrating mode and provides driving force for the rotary supporting parts so as to drive the corresponding pipelines to rotate in the first direction. The two pipelines are fixed and do not shake, an operator does not need to move, welding can be conducted in the circumferential direction of the joint of the two pipelines, and welding operation is more convenient.

Description

Technical Field

[0001] The present application relates to the technical field of pipeline welding, and in particular to a clamping mechanism for pipeline welding. Background Art

[0002] Pipelines are devices used to transport materials such as gases, liquids, or solid particles. Typically, fluids are pressurized by blowers, compressors, pumps, and boilers, then flow from high-pressure areas to low-pressure areas in the pipeline. Alternatively, the fluid's own pressure or gravity can be used for transport.

[0003] When the length of a single pipe does not meet the usage requirements, two pipes need to be welded to increase the pipe length. During welding, workers often manually align the two pipes, and then use a handheld welding gun to weld the connecting seam of the pipes circumferentially. However, during the welding process, the position of the pipes is not fixed and is prone to shaking, resulting in poor welding effect. Utility Model Content

[0004] The main purpose of this application is to provide a clamping mechanism for pipeline welding, which aims to solve the problem that the pipeline position is not fixed and is prone to shaking during welding, resulting in poor welding effect.

[0005] To achieve the above-mentioned objectives, the present application provides a clamping mechanism for pipe welding, which is used for clamping pipes. The clamping mechanism includes a base plate, two sliding parts, two groups of clamping assemblies and a driving part. The two sliding parts are arranged side by side on the same side of the base plate in a first direction and both have the freedom to slide along the first direction. The first direction is the same as the length direction of the base plate; the two groups of clamping assemblies correspond one-to-one to the two sliding parts and are arranged on the side of the corresponding sliding parts away from the base plate. The clamping assembly includes at least two rotating support parts and a clamping part. In the first direction, the clamping part in the same clamping assembly is located between at least two rotating support parts to cooperate in clamping a pipe. The axial direction of the pipe is the same as the first direction; the driving part is connected through each rotating support part. The driving part provides driving force for each rotating support part to drive the corresponding pipe to rotate around the first direction.

[0006] Optionally, the rotating support portion includes a connecting plate, two supporting plates, two first rollers, two second rollers, a third roller, a belt and two support blocks, the connecting plate is connected to the sliding portion; the two supporting plates are spaced apart in the first direction on a side of the connecting plate away from the sliding portion; the two first rollers are both rotatably connected between the two supporting plates and have the freedom to rotate around the first direction, the two first rollers are spaced apart in the second direction, and the second direction is the same as the width direction of the base plate; the two second rollers are both rotatably connected between the two supporting plates and have the freedom to rotate around the first direction, the two second rollers are spaced apart in the second direction, and the second rollers are located on the side of the first roller away from the connecting plate; the third roller The roller is rotatably connected between the two support plates and has the freedom to rotate around a first direction. In the second direction, the third roller is located between the two first rollers. In the third direction, the third roller is located between the first roller and the second roller, and the third direction is the same as the thickness direction of the base plate; the belt is arranged around the periphery of each first roller and each second roller, and the belt passes around the side of the third roller facing the connecting plate, wherein the section of the belt between the third roller and the two second rollers is an inclined section, and the pipe is located between the two inclined sections and conflicts with the two inclined sections; the two support blocks are fitted one-to-one with the two inclined sections, and the support block is connected between the two support plates and is located on the inner periphery of the belt.

[0007] Optionally, the angle between the two inclined sections is a, and 30°<a<150°.

[0008] Optionally, the support plate has a notch, and the pipe passes through the notch.

[0009] Optionally, the driving part includes a connecting shaft, a first driven gear, a first driving gear and a first motor. The connecting shaft is rotatably connected to the side of the base plate facing the sliding part and has the freedom to rotate around the first direction. The connecting shaft passes through each support plate and each third roller and the axial direction is the same as the first direction. The connecting shaft is spline-connected to each third roller and is movably connected to each support plate. The first driven gear is sleeved on one end of the connecting shaft. The first driving gear is meshed with the first driven gear. The first motor is connected to the base plate, and the first driving gear is sleeved on the outer periphery of the output shaft of the first motor.

[0010] Optionally, the clamping part includes two limiting plates, a sliding plate, a spring and two rollers, the two limiting plates are spaced apart in the second direction and connected to the sliding part, the pipe is located between the two limiting plates, and the second direction is the same as the width direction of the base plate; the sliding plate is slidably connected between the two limiting plates and has the freedom to slide along a third direction, the sliding plate is located on the side of the pipe away from the base plate, and the third direction is the same as the thickness direction of the base plate; the spring is arranged on the side of the sliding plate away from the base plate and connects the sliding plate and the limiting plate; the two rollers are arranged on the side of the sliding plate facing the pipe and in contact with the pipe, are spaced apart in the second direction and have the freedom to rotate around the first direction.

[0011] Optionally, a sliding groove extending along a third direction is provided on the side where the two limit plates are close to each other; the two ends of the sliding plate are respectively inserted into a sliding groove and slide in cooperation with the sliding groove; the spring corresponds to the sliding groove one by one and is provided in the corresponding sliding groove, and the spring extends along the third direction.

[0012] Optionally, the pressing portion further includes a handle, which is arranged on a side of the sliding plate facing away from the bottom plate.

[0013] Optionally, the clamping mechanism further includes a slide rail and a second driving part, the slide rail is arranged on the side of the base plate facing the sliding part and slides with the sliding part, and the slide rail extends along the first direction; the second driving part passes through each sliding part and provides a sliding driving force for each sliding part.

[0014] Optionally, the second driving part includes a double-headed threaded rod, a second driven gear, a second driving gear and a second motor. The double-headed threaded rod is rotatably connected to the side of the base plate facing the sliding part and has the freedom to rotate around the first direction. The double-headed threaded rod passes through each sliding part and is threadedly connected to each sliding part. The axial direction of the double-headed threaded rod is the same as the first direction. The double-headed threaded rod has two opposite threaded areas, and the two sliding parts are respectively located in a threaded area; the second driven gear is sleeved on one end of the double-headed threaded rod; the second driving gear is meshed with the second driven gear; the second motor is connected to the base plate, and the second driving gear is sleeved on the outer periphery of the output shaft of the second motor.

[0015] The embodiment of the present application proposes a clamping mechanism for pipe welding, which clamps two pipes to be welded by a group of clamping components respectively, and the two sliding parts move and drive the two pipes close to each other, so that the ends of the two pipes close to each other are aligned. At this time, the staff can perform the welding operation, and the two pipes are fixed during the welding process without shaking, and the welding effect is good. At the same time, after welding a certain place, the driving part can drive each rotating support part to drive the pipe to rotate around the first direction. In this way, the operator does not need to move and can weld along the circumference of the joint of the two pipes, which makes the welding operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the overall structure of a pipe welding clamping mechanism provided in an embodiment of the present application;

[0017] Figure 2 for Figure 1 A schematic diagram of the structural disassembly of the embodiment;

[0018] Figure 3 This is a schematic structural diagram of the pressing portion of an embodiment of the present application;

[0019] Figure 4 This is a schematic structural diagram of a rotating support portion according to an embodiment of the present application;

[0020] Figure 5 for Figure 4 Schematic diagram of the structural disassembly of the embodiment.

[0021] In the figure: 1. pipe; 2. bottom plate; 3. sliding part; 41. connecting plate; 42. supporting plate; 43. first roller; 44. second roller; 45. third roller; 46. belt; 47. supporting block; 51. connecting shaft; 52. first driven gear; 53. first driving gear; 54. first motor; 61. limiting plate; 611. slide groove; 62. sliding plate; 63. spring; 64. roller; 65. handle; 71. slide rail; 81. double-headed threaded rod; 82. second driven gear; 83. second driving gear; 84. second motor.

[0022] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0026] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] refer to Figures 1 to 5 , it should be understood that Figure 2 The connections between the components should be like Figure 1 As compact as Figure 5 The connections between the components should be like Figure 4 As compact as in the example, this is just an example. Figure 2 and Figure 5 The middle part of the components is displayed separately for easy understanding. An embodiment of the present application provides a clamping mechanism for pipe welding, which is used to clamp a pipe 1. The clamping mechanism may include a base plate 2, two sliding parts 3, two groups of clamping components and a driving part. The two sliding parts 3 are arranged side by side on the same side of the base plate 2 in a first direction and both have the freedom to slide along the first direction. The first direction is the same as the length direction of the base plate 2; the two groups of clamping components correspond one-to-one to the two sliding parts 3 and are arranged on the side of the corresponding sliding part 3 away from the base plate 2. The clamping component may include at least two rotating support parts and a clamping part. In the first direction, the clamping part in the same clamping component is located between at least two rotating support parts to cooperate in clamping a pipe 1. The axial direction of the pipe 1 is the same as the first direction; the driving part is connected through each rotating support part, and the driving part provides driving force for each rotating support part to drive the corresponding pipe 1 to rotate around the first direction.

[0028] The embodiment of the present application proposes a clamping mechanism for pipe welding, which clamps two pipes 1 to be welded respectively by a group of clamping components, and the two sliding parts 3 move and drive the two pipes 1 to approach each other, so that the ends of the two pipes 1 that are close to each other are aligned. At this time, the staff can perform the welding operation, and the two pipes 1 are fixed during the welding process and will not shake, so the welding effect is good. At the same time, after welding a certain place, the driving part can drive each rotating support part to drive the pipe 1 to rotate around the first direction. In this way, the operator does not need to move and can weld along the circumference of the joint of the two pipes 1, which makes the welding operation more convenient.

[0029] It should be understood that if Figure 1 As shown, the first direction is the X direction. When the base plate 2 is placed horizontally, that is, the thickness direction of the base plate 2 is the same as the direction of gravity, in the same clamping assembly, each rotating support part provides an upward supporting force for the pipe 1, and the clamping part provides a downward clamping force for the pipe 1. In the first direction, the clamping part is located between at least two rotating support parts, so that the pipe 1 can be clamped and fixed.

[0030] Furthermore, in the same clamping assembly, the more the number of rotating support parts is, the better the supporting effect on the pipe 1 is, but the overall structure of the clamping mechanism is more complicated. In the preferred embodiment of the present application, Figure 1 As shown, only two rotation support parts and one pressing part are provided in the same group of clamping components.

[0031] refer to Figure 4 and Figure 5 In an exemplary embodiment, the rotating support portion may include a connecting plate 41, two supporting plates 42, two first rollers 43, two second rollers 44, a third roller 45, a belt 46 and two support blocks 47, the connecting plate 41 is connected to the sliding portion 3; the two supporting plates 42 are spaced apart in the first direction on the side of the connecting plate 41 away from the sliding portion 3; the two first rollers 43 are both rotatably connected between the two supporting plates 42 and have the freedom to rotate around the first direction, the two first rollers 43 are spaced apart in the second direction, and the second direction is the same as the width direction of the base plate 2; the two second rollers 44 are both rotatably connected between the two supporting plates 42 and have the freedom to rotate around the first direction, the two second rollers 44 are spaced apart in the second direction, and the second rollers 44 are located on the side of the first roller 43 away from the connecting plate 41 side; the third roller 45 is rotatably connected between the two support plates 42 and has the freedom to rotate around the first direction, in the second direction, the third roller 45 is located between the two first rollers 43, and in the third direction, the third roller 45 is located between the first roller 43 and the second roller 44, and the third direction is the same as the thickness direction of the base plate 2; the belt 46 is arranged around the periphery of each first roller 43 and each second roller 44, and the belt 46 bypasses the third roller 45 and faces the side of the connecting plate 41, wherein the section of the belt 46 between the third roller 45 and the two second rollers 44 is an inclined section, and the pipe 1 is located between the two inclined sections and conflicts with the two inclined sections; the two support blocks 47 are fitted one-to-one with the two inclined sections, and the support block 47 is connected between the two support plates 42 and located on the inner periphery of the belt 46.

[0032] Specifically, such as Figure 5As shown, the second direction is the Y direction, the third direction is the Z direction, and the portion where the belt 46 contacts the pipe 1 is V-shaped, i.e., two inclined sections, and the support block 47 supports the inclined sections. In this way, when the pipe 1 is located between the two inclined sections, the support block 47 supports the pipe 1 through the belt 46; at the same time, the two inclined sections can support a wider range of pipe 1 diameters, making it more convenient to use.

[0033] It should be understood that in the third direction, the third roller 45 is located between the first roller 43 and the second roller 44, so that the portion of the belt 46 that contacts the pipe 1 can be V-shaped. Figure 5 As shown, the endless belt 46 does not contact each other and generate friction between the third roller 45 and the connecting plate 41, thereby extending the service life of the belt 46.

[0034] In an exemplary embodiment, the angle between the two inclined sections is a, and 30°<a<150°. Specifically, a can be 50°, 70°, 90°, 110°, 130°, etc. The diameter of the pipe 1 that can be supported by the two inclined sections has a range and has a maximum and minimum value. Specifically, the pipe 1 cannot contact the third roller 45, and the pipe 1 needs to contact the two inclined sections. In this way, the two inclined sections support the pipe 1 more stably, and the rotation process of the pipe 1 is also more stable. Further, the range of the pipe 1 diameter can be determined. When the value of a increases, the above minimum and maximum values ​​increase. In the preferred embodiment of the present application, a is 70°, so the range of the pipe 1 diameter that can be supported by the two inclined sections is relatively common.

[0035] In an exemplary embodiment, as Figure 4 As shown, the support plate 42 has a gap, and the pipe 1 passes through the gap; the support plate 42 can be specifically U-shaped, so that the support plate 42 can connect the rollers and the support block 47, and at the same time the support plate 42 will not affect the welding process of the pipe 1, and the pipe 1 can pass through the U-shaped gap.

[0036] refer to Figure 2 、 Figure 4 and Figure 5In an exemplary embodiment, the driving part 1 may include a connecting shaft 51, a first driven gear 52, a first driving gear 53 and a first motor 54. The connecting shaft 51 is rotatably connected to the side of the base plate 2 facing the sliding part 3 and has the freedom to rotate around the first direction. The connecting shaft 51 passes through each support plate 42 and each third roller 45 and the axial direction is the same as the first direction. The connecting shaft 51 is spline-connected to each third roller 45, and the connecting shaft 51 is movably connected to each support plate 42; the first driven gear 52 is sleeved on one end of the connecting shaft 51; the first driving gear 53 is meshed with the first driven gear 52; the first motor 54 is connected to the base plate 2, and the first driving gear 53 is sleeved on the outer periphery of the output shaft of the first motor 54.

[0037] Specifically, such as Figure 2 and Figure 5 As shown, the connecting shaft 51 passes through each third roller 45 and is spline-connected to each third roller 45. Thus, when the connecting shaft 51 rotates, it can drive each third roller 45 to rotate synchronously. At the same time, each third roller 45 can slide relative to the connecting shaft 51. When the first motor 54 is in operation, it drives the first driving gear 53 to rotate. The first driving gear 53 meshes with the first driven gear 52. The first driving gear 53 further drives the first driven gear 52 and the connecting shaft 51 to rotate, ultimately driving each third roller 45 to rotate. The third roller 45 further drives the corresponding belt 46 to rotate. The belt 46 drives the pipe 1 to rotate around the axial direction of the pipe 1, thereby facilitating circumferential welding of the joint between the two pipes 1.

[0038] The third rollers 45 and the connecting shaft 51 can slide relative to each other, so the working process of the connecting shaft 51 and the process of the sliding part 3 driving the rotating support parts to slide do not affect each other.

[0039] Furthermore, the connecting shaft 51 is movably connected to each support plate 42 , so that the support plate 42 will not affect the working process of the connecting shaft 51 .

[0040] refer to Figure 3 In an exemplary embodiment, the clamping part may include two limiting plates 61, a sliding plate 62, a spring 63 and two rollers 64. The two limiting plates 61 are spaced apart in the second direction and are connected to the sliding part 3. The pipe 1 is located between the two limiting plates 61, and the second direction is the same as the width direction of the bottom plate 2; the sliding plate 62 is slidably connected between the two limiting plates 61 and has the freedom to slide along the third direction. The sliding plate 62 is located on the side of the pipe 1 away from the bottom plate 2, and the third direction is the same as the thickness direction of the bottom plate 2; the spring 63 is arranged on the side of the sliding plate 62 away from the bottom plate 2 and connects the sliding plate 62 and the limiting plate 61; the two rollers 64 are arranged on the side of the sliding plate 62 facing the pipe 1 and are in contact with the pipe 1. They are spaced apart in the second direction and have the freedom to rotate around the first direction.

[0041] refer to Figure 3 In an exemplary embodiment, a sliding groove 611 extending along a third direction is provided on the side where the two limiting plates 61 are close to each other; the two ends of the sliding plate 62 are respectively inserted into a sliding groove 611 and slide in cooperation with the sliding groove 611; the spring 63 corresponds to the sliding groove 611 one by one and is provided in the corresponding sliding groove 611, and the spring 63 extends along the third direction.

[0042] Specifically, the spring 63 is in a compressed state, so that the spring 63 will push the end of the limit plate 61 inserted into the slide groove 611 to move, further driving the sliding plate 62 and the two rollers 64 to approach the pipe 1 until the two rollers 64 contact the pipe 1, thereby applying a clamping force to the pipe 1.

[0043] Furthermore, the roller 64 has the freedom to rotate about a first direction, so that when the pipe 1 rotates, the roller 64 rotates along with the pipe 1. The friction between the roller 64 and the pipe 1 is rolling friction, which is smaller, and has a better protection effect on the pipe 1, while facilitating the rotation of the pipe 1.

[0044] Furthermore, there are two rollers 64 and they are spaced apart in the second direction, such as Figure 3 As shown, the two rollers 64 compress the pipe 1 in a more stable manner, and effectively prevent the pipe 1 from deflecting in the second direction when a single roller 64 compresses the pipe 1 .

[0045] refer to Figure 3 In an exemplary embodiment, the pressing portion may further include a handle 65 , which is disposed on a side of the sliding plate 62 facing away from the bottom plate 2 .

[0046] Specifically, such as Figure 3 As shown, when clamping the pipe 1, the handle 65 can be pulled to drive the sliding plate 62 away from the two inclined sections along the third direction, and the pipe 1 can be inserted into the two inclined sections. After that, the handle 65 can be released, and the sliding plate 62 and the roller 64 can be pushed by the spring 63 to press the pipe 1.

[0047] refer to Figure 2 In an exemplary embodiment, the clamping mechanism may further include a slide rail 71 and a second driving part. The slide rail 71 is arranged on the side of the base plate 2 facing the sliding part 3 and slides with the sliding part 3. The slide rail 71 extends along the first direction; the second driving part passes through each sliding part 3 and provides a sliding driving force for each sliding part 3.

[0048] Specifically, such as Figure 2 As shown, the sliding portion 3 is slidably matched with the slide rail 71 , and the slide rail 71 extends along a first direction, so that the sliding portion 3 can slide along the extending direction of the slide rail 71 .

[0049] refer to Figure 2In an exemplary embodiment, the second driving part may include a double-headed threaded rod 81, a second driven gear 82, a second driving gear 83 and a second motor 84. The double-headed threaded rod 81 is rotatably connected to the side of the base plate 2 facing the sliding part 3 and has the freedom to rotate around a first direction. The double-headed threaded rod 81 passes through each sliding part 3 and is threadedly connected to each sliding part 3. The axial direction of the double-headed threaded rod 81 is the same as the first direction. The double-headed threaded rod 81 has two opposite threaded areas, and the two sliding parts 3 are respectively located in one threaded area; the second driven gear 82 is sleeved on one end of the double-headed threaded rod 81; the second driving gear 83 is meshed with the second driven gear 82; the second motor 84 is connected to the base plate 2, and the second driving gear 83 is sleeved on the outer periphery of the output shaft of the second motor 84.

[0050] Specifically, when the second motor 84 is working, it drives the second driving gear 83 to rotate, and the second driving gear 83 is engaged with the second driven gear 82. When the second driving gear 83 rotates, it will drive the second driven gear 82 and the double-headed threaded rod 81 to rotate. The double-headed threaded rod 81 is threadedly connected to the two sliding parts 3. When the double-headed threaded rod 81 rotates, it can drive the two sliding parts 3 to move closer to or away from each other in the first direction, and finally drive the two pipes 1 to move closer to or away from each other.

[0051] It should be noted that the double-headed threaded rod 81 has two threaded areas with opposite rotation directions in its own axial direction, and the two sliding parts 3 are respectively located in one threaded area. In this way, when the double-headed threaded rod 81 rotates, it can drive the two sliding parts 3 to move closer to or away from each other.

[0052] The above are only preferred embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A clamping mechanism for pipe welding, characterized in that: Used for clamping a pipe (1), the clamping mechanism comprises: bottom plate (2); Two sliding parts (3) are arranged side by side on the same side of the bottom plate (2) in a first direction and both have the freedom to slide along the first direction, and the first direction is the same as the length direction of the bottom plate (2); Two groups of clamping assemblies are arranged in one-to-one correspondence with the two sliding parts (3) and are arranged on the side of the corresponding sliding part (3) facing away from the bottom plate (2), the clamping assembly comprising at least two rotating support parts and a pressing part, in the first direction, the pressing part in the same clamping assembly is located between at least two rotating support parts to cooperate with clamping a pipe (1), and the axial direction of the pipe (1) is the same as the first direction; The driving part 1 is connected through each of the rotating support parts, and the driving part 1 provides driving force for each of the rotating support parts to drive the corresponding pipe (1) to rotate around the first direction.

2. The pipe welding clamping mechanism according to claim 1, wherein: The rotating support portion includes: A connecting plate (41) connected to the sliding portion (3); Two support plates (42) are spaced apart and arranged on a side of the connecting plate (41) facing away from the sliding portion (3) in the first direction; Two first rollers (43) are rotatably connected between the two support plates (42) and have the freedom to rotate about the first direction. The two first rollers (43) are spaced apart in a second direction, and the second direction is the same as the width direction of the bottom plate (2); Two second rollers (44) are rotatably connected between the two support plates (42) and have the freedom to rotate about the first direction. The two second rollers (44) are spaced apart in the second direction. The second rollers (44) are located on a side of the first roller (43) away from the connecting plate (41); a third roller (45) rotatably connected between the two support plates (42) and having the freedom to rotate about the first direction; in the second direction, the third roller (45) is located between the two first rollers (43); in the third direction, the third roller (45) is located between the first roller (43) and the second roller (44); the third direction is the same as the thickness direction of the bottom plate (2); a belt (46) disposed around the periphery of each of the first rollers (43) and each of the second rollers (44), the belt (46) passing around the third roller (45) and facing the side of the connecting plate (41), wherein the section of the belt (46) between the third roller (45) and the two second rollers (44) is an inclined section, and the pipe (1) is located between the two inclined sections and contacts the two inclined sections; Two support blocks (47) are fitted in a one-to-one correspondence with the two inclined sections. The support blocks (47) are connected between the two support plates (42) and are located on the inner periphery of the belt (46).

3. The pipe welding clamping mechanism according to claim 2, wherein: The included angle between the two inclined sections is a, and 30°<a<150°.

4. The pipe welding clamping mechanism according to claim 2, wherein: The support plate (42) has a notch, and the pipe (1) passes through the notch.

5. The pipe welding clamping mechanism according to claim 2, wherein: The driving unit 1 includes: A connecting shaft (51) is rotatably connected to a side of the base plate (2) facing the sliding portion (3) and has the freedom to rotate about the first direction. The connecting shaft (51) passes through each of the support plates (42) and each of the third rollers (45) and has an axial direction that is the same as the first direction. The connecting shaft (51) is spline-connected to each of the third rollers (45). The connecting shaft (51) is movably connected to each of the support plates (42). A first driven gear (52) is sleeved on one end of the connecting shaft (51); a first driving gear (53) meshing with the first driven gear (52); The first motor (54) is connected to the base plate (2), and the first driving gear (53) is sleeved on the outer periphery of the output shaft of the first motor (54).

6. The pipe welding clamping mechanism according to claim 1, wherein: The pressing portion includes: Two limiting plates (61) are spaced apart in a second direction and connected to the sliding portion (3); the pipeline (1) is located between the two limiting plates (61); the second direction is the same as the width direction of the bottom plate (2); a sliding plate (62) slidably connected between the two limiting plates (61) and having the freedom to slide along a third direction, the sliding plate (62) being located on a side of the pipe (1) away from the bottom plate (2), the third direction being the same as the thickness direction of the bottom plate (2); a spring (63) disposed on a side of the sliding plate (62) facing away from the bottom plate (2) and connecting the sliding plate (62) and the limiting plate (61); Two rollers (64) are arranged on the side of the sliding plate (62) facing the pipeline (1) and in contact with the pipeline (1), are spaced apart in the second direction and have the freedom to rotate around the first direction.

7. The pipe welding clamping mechanism according to claim 6, wherein: A sliding groove (611) extending along the third direction is provided on each side of the two limiting plates (61) that are close to each other; Both ends of the sliding plate (62) are respectively inserted into the sliding groove (611) and slidingly engaged with the sliding groove (611); The spring (63) corresponds to the sliding groove (611) one by one and is arranged in the corresponding sliding groove (611), and the spring (63) extends along the third direction.

8. The pipe welding clamping mechanism according to claim 6, wherein: The pressing portion further includes: A handle (65) is provided on a side of the sliding plate (62) facing away from the bottom plate (2).

9. The pipe welding clamping mechanism according to claim 1, wherein: The clamping mechanism further comprises: a slide rail (71) provided on a side of the bottom plate (2) facing the sliding portion (3) and slidingly engaged with the sliding portion (3), the slide rail (71) extending along the first direction; The second driving part penetrates each of the sliding parts (3) and provides a sliding driving force for each of the sliding parts (3).

10. The pipe welding clamping mechanism according to claim 9, wherein: The second driving unit includes: A double-threaded rod (81) is rotatably connected to a side of the base plate (2) facing the sliding portion (3) and has the freedom to rotate about the first direction. The double-threaded rod (81) passes through each of the sliding portions (3) and is threadedly connected to each of the sliding portions (3). The axial direction of the double-threaded rod (81) is the same as the first direction. The double-threaded rod (81) has two opposite threaded areas, and the two sliding portions (3) are respectively located in one of the threaded areas. A second driven gear (82) is sleeved on one end of the double-threaded rod (81); a second driving gear (83) meshing with the second driven gear (82); The second motor (84) is connected to the base plate (2), and the second driving gear (83) is sleeved on the outer periphery of the output shaft of the second motor (84).

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