Axial rotation device and method for connecting pipes

Abstract

The present application belongs to the technical field of pipeline connection, and discloses a connecting pipeline axial rotation device and method, which comprises a first orifice piece, a second orifice piece and an axial rotation assembly. The first orifice piece and the second orifice piece are detachably fixedly connected with the pipeline. The axial rotation assembly comprises a magnetic attraction connecting piece and a rotation driving piece. The magnetic attraction connecting piece is installed on the outer side of the connecting pipeline as a first rotation support point and has two working states of opening and closing. The rotation driving piece is arranged on the first orifice piece and / or the second orifice piece as a second rotation support point. The output end of the rotation driving piece is connected with the magnetic attraction connecting piece and can exert a rotation driving force on the magnetic attraction connecting piece so as to drive the connecting pipeline to rotate around the axis thereof. The present application can accurately adjust the axial rotation angle and the circumferential position of the connecting pipeline, accurately adjust the weld gap, and make the weld meet the requirements of the pipeline welding evaluation procedure, thereby improving the welding quality of the connecting pipeline and the pipelines on both sides, and the operation process is simple, safe and highly applicable.

Description

Technical Field

[0001] This invention relates to the field of pipe connection technology, and in particular to a device and method for axially rotating pipe connections. Background Technology

[0002] During the connection of natural gas pipelines, when two pipelines cannot be directly connected due to design or geographical conditions, or when two pipelines cannot be directly connected due to differences in diameter, wall thickness, or pressure rating, it is necessary to add intermediate connecting pipelines for adjustment and transition to ensure the stability and safety of the entire pipeline system.

[0003] During the welding process between the two ends of the intermediate connecting pipe and the pipes on both sides, the weld seams must comply with the relevant welding qualification procedures to ensure that the weld gaps are uniform and meet the requirements. However, due to errors in the installation orientation of the connecting pipes, axial rotation of the connecting pipes may cause misalignment and unevenness in the weld gaps. To adjust the installation orientation and axial rotation angle of the connecting pipes, the following two methods are usually adopted: One method is to place a hand-operated hoist on each side of the connecting pipe and use a sling or other flexible load-bearing device to connect the hand-operated hoists to lift the intermediate connecting pipe. By adjusting the stroke of the hand-operated hoists on both sides, the axial rotation orientation of the intermediate pipe can be adjusted. This method requires additional hand-operated hoists and slings, increasing the on-site operation procedures and potential safety risks. The other solution is to adjust the center of gravity of the intermediate connecting pipe using a sling to achieve the adjustment of the axial rotation of the central connecting pipe. Utilizing the friction between the sling and the pipe, a certain range of axial rotation adjustment can be made. However, this method can only perform large-range rotation adjustments and cannot be precisely controlled, thus its applicability is relatively limited.

[0004] Therefore, there is an urgent need for a device and method for axially rotating connecting pipes to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a device and method for axially rotating a connecting pipe, which can precisely adjust the axial rotation angle and circumferential position of the connecting pipe in order to precisely adjust the weld gap. The weld meets the requirements of the pipe welding qualification procedure, improves the welding quality of the connecting pipe and the pipes on both sides, and has simple and safe operation procedures with strong applicability.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A device for axially rotating a connecting pipe, comprising:

[0008] The first fitting has one end detachably and fixedly connected to the outside of the first pipe, and the other end detachably and fixedly connected to the connecting pipe.

[0009] The second connector has one end detachably and fixedly connected to the outside of the second pipe, and the other end detachably and fixedly connected to the connecting pipe.

[0010] An axial rotation assembly includes a magnetic connector and a rotation drive. The magnetic connector is mounted on the outside of the connecting pipe, serving as a first rotation fulcrum, and has a magnetic state that connects the connecting pipe to the first and second pipes on both sides, and a non-magnetic state that disconnects the connecting pipe from the first and second pipes on both sides. The rotation drive is disposed on the first and / or the second fitting, serving as a second rotation fulcrum. The output end of the rotation drive is connected to the magnetic connector and can apply a rotational driving force to the magnetic connector to drive the connecting pipe to rotate around the axis of the connecting pipe.

[0011] Furthermore, the magnetic connector is installed on the connecting pipe near the first mating member, and the rotary drive is disposed on the first mating member, with its output end connected to the magnetic connector; or

[0012] The magnetic connector is installed on the connecting pipe near the second coupling member, and the rotary drive member is located on the second coupling member, with its output end connected to the connecting pipe.

[0013] Furthermore, at least two axial rotation components are provided, at least two magnetic connectors are installed at both ends of the connecting pipe, and at least two rotation drive components are provided on the first and second mating components and are respectively connected to the magnetic connectors on the adjacent sides, and can synchronously apply rotational driving force to the magnetic connectors.

[0014] Furthermore, the magnetic connector includes an electromagnet and a circuit controller. The circuit controller is disposed on the connecting pipe, and its output terminal is electrically connected to the electromagnet to control the energization and de-energization of the electromagnet. The electromagnet is installed on the connecting pipe.

[0015] Furthermore, a magnetic switch is provided on the magnetic connector, and the magnetic switch is electrically connected to the circuit controller.

[0016] Furthermore, the rotary drive can selectively drive the connecting pipe to rotate clockwise or counterclockwise around its axis.

[0017] Furthermore, the rotary drive component includes a hydraulic cylinder, a push rod, a switching component, and a linkage shaft. The hydraulic cylinder and the push rod are respectively disposed at both ends of the linkage shaft and are both mounted on the first or second mating component. The switching component is disposed on the linkage shaft and can selectively engage the hydraulic cylinder or the push rod with the linkage shaft. The output ends of the hydraulic cylinder and the push rod can both be connected to the magnetic connector.

[0018] Furthermore, gaskets are provided at the connection points between the first fitting and / or the second fitting and the first pipe, the second pipe, and the connecting pipe.

[0019] Furthermore, the axial rotation device for the connecting pipe also includes a control component, which is electrically connected to the axial rotation assembly.

[0020] A method for axially rotating a connecting pipe, using any of the aforementioned pipe axial rotation devices, includes the following steps:

[0021] S1: The two ends of the connecting pipe are respectively detachably and fixedly connected to the first pipe and the second pipe through the first fitting and the second fitting;

[0022] S2: Install the magnetic connector on the connecting pipe, and install the rotary drive on the first and / or the second connector, with its output end connected to the magnetic connector;

[0023] S3: Put the magnetic connector into a magnetic state, and at the same time release the mechanical fixation of the first and second mating parts to the connecting pipe, so that the connecting pipe is in a rotatable state;

[0024] S4: The rotary drive unit drives the magnetic connector, causing the connecting pipe to rotate around its axis, so as to adjust the gap between the two ends of the connecting pipe and the first pipe and the second pipe;

[0025] S5: When the gaps between the two ends of the connecting pipe and the first pipe and the second pipe meet the corresponding welding qualification procedures, welding operations are performed on the two ends of the connecting pipe.

[0026] S6: After welding is completed, remove the axial rotation device of the connecting pipe and prepare for the installation and welding of the next section of the connecting pipe.

[0027] The beneficial effects of this invention are:

[0028] This invention provides an axial rotation device and method for connecting pipes. One end of a first and second mating member is detachably and fixedly connected to a first and a second pipe on opposite sides of a connecting pipe, respectively, and the other end is detachably and fixedly connected to both ends of the connecting pipe, respectively, for initially positioning the relative positions of the first pipe, the connecting pipe, and the second pipe. The axial rotation assembly includes a magnetic connector and a rotation drive. The magnetic connector is mounted on the connecting pipe, serving as a first rotation fulcrum; the rotation drive is mounted on the first and / or second mating members, serving as a second rotation fulcrum. When the magnetic connector is activated, the connecting pipe can be firmly attracted and connected to the first and second pipes by magnetic force. At this time, the mechanical fixation of the first and second mating members to the connecting pipe is released, allowing the connecting pipe to maintain a stable docking relationship under magnetic attraction. Under the joint support of the first and second rotation fulcrums, the rotation drive, connected to the magnetic connector through its output end, can apply a rotational driving force around the connecting pipe's axis, driving the connecting pipe to achieve axial rotation. Because the magnetic connector can provide sufficient friction between the connecting pipe and the pipes on both sides, it ensures the stability of the position of the connecting pipe during rotation, thereby making the adjustment process smoother and more precise, and improving the welding quality between the connecting pipe and the pipes on both sides; the components can be detached, making the operation simple and safe, and with strong applicability. Attached Figure Description

[0029] Figure 1 This is an assembly diagram of the connecting pipe axial rotation device, the first pipe, the second pipe, and the connecting pipe in this invention;

[0030] Figure 2 This is a flowchart of the method for axial rotation of the connecting pipe in this invention.

[0031] In the picture:

[0032] 100. First pipe; 200. Second pipe; 300. Connecting pipe;

[0033] 1. First mating component; 11. First annular hoop; 12. First push rod; 13. Second push rod; 2. Second mating component; 21. Second annular hoop; 22. Third push rod; 23. Fourth push rod; 3. Magnetic connector; 4. Rotation drive component. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0035] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0038] Please refer to Figure 1 As shown, the present invention provides an axial rotation device for connecting pipes, including a first mating member 1, a second mating member 2, and an axial rotation assembly. One end of the first mating member 1 is detachably and fixedly connected to the outside of a first pipe 100, and the other end is detachably and fixedly connected to a connecting pipe 300. One end of the second mating member 2 is detachably and fixedly connected to the outside of a second pipe 200, and the other end is detachably and fixedly connected to the connecting pipe 300. The axial rotation assembly includes a magnetic connector 3 and a rotation drive 4. The magnetic connector 3 is installed on the outside of the connecting pipe 300. As the first rotation fulcrum, it has a magnetic state that connects the connecting pipe 300 to the first pipe 100 and the second pipe 200 on both sides, and a non-magnetic state that disconnects the connecting pipe 300 from the first pipe 100 and the second pipe 200 on both sides; the rotation drive 4 is disposed on the first mating member 1 and / or the second mating member 2, serving as the second rotation fulcrum. The output end of the rotation drive 4 is connected to the magnetic connector 3, and can apply a rotational driving force to the magnetic connector 3 so as to drive the connecting pipe 300 to rotate around the axis of the connecting pipe 300.

[0039] One end of the first mating member 1 and the second mating member 2 are detachably and fixedly connected to the first pipe 100 and the second pipe 200 on both sides of the connecting pipe 300, respectively, and the other end is detachably and fixedly connected to both ends of the connecting pipe 300, respectively, for initially positioning the relative positions of the first pipe 100, the connecting pipe 300, and the second pipe 200. The axial rotation assembly includes a magnetic connector 3 and a rotation drive 4. The magnetic connector 3 is installed on the connecting pipe 300 as a first rotation fulcrum; the rotation drive 4 is installed on the first mating member 1 and / or the second mating member 2 as a second rotation fulcrum. When the magnetic connector 3 is activated, the connecting pipe 300 can be firmly attracted and connected to the first pipe 100 and the second pipe 200 by magnetic force. At this time, the mechanical fixation of the first mating member 1 and the second mating member 2 on the connecting pipe 300 is released, so that the connecting pipe 300 maintains a stable docking relationship under the magnetic attraction. Supported by the first and second rotational fulcrums, the rotary drive 4 is connected to the magnetic connector 3 via its output end, applying a rotational driving force around the connecting pipe 300 to drive its axial rotation. Because the magnetic connector 3 provides sufficient friction between the connecting pipe 300 and the pipes on both sides, it ensures the stability of the connecting pipe 300's position during rotation, making the adjustment process smoother and more precise. Therefore, the connecting pipe axial rotation device can precisely adjust the axial rotation angle and circumferential position of the connecting pipe 300, and precisely adjust the weld gap between the connecting pipe 300 and the pipes on both sides, ensuring the weld meets the requirements of the corresponding pipe welding qualification procedure, improving the welding quality of the connecting pipe 300 and the pipes on both sides. The operation is simple, safe, and highly applicable.

[0040] Specifically, the first mating component 1 includes a first annular clamp 11, a first push rod 12, and a second push rod 13. The first annular clamp 11 is sleeved on the outside of the first pipe 100. The first push rod 12 is spaced around the first annular clamp 11 and arranged radially along the first annular clamp 11. The first push rod 12 is threadedly connected to the first annular clamp 11. By rotating the first push rod 12, the first pipe 100 and the first annular clamp 11 can be fixedly connected. The second push rod 13 is spaced around the first annular clamp 11 and arranged side by side with the first push rod 12. The second push rod 13 is threadedly connected to the first annular clamp 11. By rotating the second push rod 13, the connecting pipe 300 and the first annular clamp 11 can be fixedly connected, thereby mechanically fixing the relative positions of the first pipe 100 and the connecting pipe 300.

[0041] The second fitting 2 includes a second annular clamp 21, a third push rod 22, and a fourth push rod 23. The second annular clamp 21 is sleeved on the outside of the second pipe 200. The third push rod 22 is spaced around the second annular clamp 21 and arranged radially along the second annular clamp 21. The third push rod 22 is threaded to the second annular clamp 21. By rotating the third push rod 22, the second pipe 200 and the second annular clamp 21 can be fixedly connected. The fourth push rod 23 is spaced around the second annular clamp 21 and arranged side by side with the third push rod 22. The third push rod 22 is threaded to the second annular clamp 21. By rotating the fourth push rod 23, the connecting pipe 300 and the second annular clamp 21 can be fixedly connected, thereby mechanically fixing the relative positions of the second pipe 200 and the connecting pipe 300.

[0042] In some embodiments, gaskets are provided at the connection points between the first mating member 1 and / or the second mating member 2 and the first pipe 100, the second pipe 200, and the connecting pipe 300; this protects the surfaces of the first pipe 100, the second pipe 200, and the connecting pipe 300 from wear during rotation and fixing. It is understood that the gaskets can be made of soft, elastic materials, such as silicone pads, and are not specifically limited herein. Specifically, the gaskets are installed on the contact surfaces of the first push rod 12 and the first pipe 100, the second push rod 13 and the connecting pipe 300, the third push rod 22 and the second pipe 200, and the fourth push rod 23 and the connecting pipe 300.

[0043] Specifically, the rotary drive 4 can be installed on the first annular hoop 11, the first push rod 12, the second push rod 13, the second annular hoop 21, the third push rod 22, or the fourth push rod 23, without being specifically limited here.

[0044] In some alternative embodiments, the magnetic connector 3 is installed on the connecting pipe 300 near the first mating member 1, and the rotary drive 4 is disposed on the first mating member 1, with its output end connected to the magnetic connector 3; or the magnetic connector 3 is installed on the connecting pipe 300 near the second mating member 2, and the rotary drive 4 is disposed on the second mating member 2, with its output end connected to the connecting pipe 300; wherein, by arranging the magnetic connector 3 and the rotary drive 4 on the same side, the entire rotary drive 4 structure is made more compact, avoiding complex connections spanning the entire connecting pipe 300, reducing the number of intermediate parts, and helping to reduce manufacturing and maintenance costs; and this arrangement is equivalent to the drive shaft and the rotation fulcrum being closely matched, resulting in a short torque transmission path and high rigidity, thereby reducing hysteresis and torsional deformation during rotation and improving response speed and control accuracy.

[0045] In other optional embodiments, at least two axial rotation components are provided. At least two magnetic connectors 3 are installed at both ends of the connecting pipe 300, and at least two rotation drive components 4 are provided on the first mating component 1 and the second mating component 2, and are respectively connected to the magnetic connectors 3 on the adjacent sides, and can synchronously apply rotational driving force to the magnetic connectors 3. Among them, the two rotation drive components 4 act on the magnetic connectors 3 at both ends of the connecting pipe 300 at the same time. The magnetic connectors 3 at both ends serve as the first rotation fulcrum, which can simultaneously constrain the axial and circumferential positions of both ends of the connecting pipe 300, so that the rotational torque distribution is more uniform, and the angle change can be controlled more precisely. This is beneficial to significantly improve the consistency and accuracy of the circumferential weld gap control. The synchronous application of rotational driving force ensures that the entire connecting pipe 300 rotates uniformly around the axis, avoiding twisting, swaying or dragging caused by single-end drive.

[0046] Specifically, the magnetic connector 3 includes an electromagnet and a circuit controller. The circuit controller is located on the connecting pipe 300, and its output end is electrically connected to the electromagnet to control the electromagnet's energization and de-energization. The electromagnet is installed on the connecting pipe 300. By controlling the energization and de-energization of the electromagnet through the circuit controller, the magnetic attraction force can be turned on or off at any time, realizing the rapid connection and separation between the connecting pipe 300 and the first pipe 100 and the second pipe 200. When energized, the electromagnet can provide a large attraction force, which is sufficient to stabilize the relative position of the connecting pipe 300 during rotation and prevent displacement or slippage.

[0047] Optionally, a magnetic switch is provided on the magnetic connector 3, and the magnetic switch is electrically connected to the circuit controller; the operator can control the electromagnet to be energized and de-energized through the magnetic switch, making the operation more convenient.

[0048] In some embodiments, the rotary drive 4 can selectively drive the connecting pipe 300 to rotate clockwise or counterclockwise around its axis; this design means that the rotary driving force output by the rotary drive 4 has a bidirectional adjustment function, which can adapt to multi-directional adjustment needs. When the connecting pipe 300 needs to rotate clockwise, the rotary drive 4 applies a pulling force to the magnetic connector 3 through its output end, thereby driving the connecting pipe 300 to rotate in the clockwise direction; when the connecting pipe 300 needs to rotate counterclockwise, the rotary drive 4 applies tension through its output end to achieve counterclockwise rotation, which facilitates the rapid and precise adjustment and alignment of the weld gap, improving adjustment efficiency and operational intuitiveness.

[0049] Specifically, the rotary drive component 4 includes a hydraulic cylinder, a push rod, a switching component, and a linkage shaft. The hydraulic cylinder and the push rod are respectively located at both ends of the linkage shaft and are both mounted on the first mating component 1 or the second mating component 2. The switching component is located on the linkage shaft and can selectively engage the hydraulic cylinder or the push rod with the linkage shaft. The output ends of both the hydraulic cylinder and the push rod can be connected to the magnetic connector 3. The switching component enables the alternating engagement of the hydraulic cylinder and the push rod, allowing the selection of the drive device according to actual needs. By having the hydraulic cylinder and the push rod both located in the same position and driven uniformly by the linkage shaft, the device structure is more compact and simple, reducing manufacturing and maintenance costs.

[0050] To facilitate operator control, the axial rotation device for the connecting pipe also includes a control component, which is electrically connected to the axial rotation assembly. The operator can remotely control the opening and closing of the magnetic connector 3 and remotely adjust the driving force applied by the rotation drive 4 via the control component. The control component includes a control panel and a button box. By setting the rotation angle and direction on the control panel, precise positioning and adjustment of the connecting pipe 300 can be achieved to meet the requirements of weld gap control and weld angle alignment.

[0051] Please refer to Figure 2 As shown, the present invention also provides a method for axially rotating a connecting pipe, employing the connecting pipe axial rotation device of any of the above embodiments, comprising the following steps:

[0052] S1: The two ends of the connecting pipe 300 are respectively detachably and fixedly connected to the first pipe 100 and the second pipe 200 via the first fitting 1 and the second fitting 2;

[0053] S2: Install a magnetic connector 3 on the connecting pipe 300, and install a rotary drive 4 on the first mating part 1 and / or the second mating part 2, with its output end connected to the magnetic connector 3.

[0054] S3: Put the magnetic connector 3 into a magnetic state, and at the same time release the mechanical fixation of the first mating piece 1 and the second mating piece 2 to the connecting pipe 300, so that the connecting pipe 300 is in a rotatable state;

[0055] S4: The rotary drive 4 drives the magnetic connector 3, causing the connecting pipe 300 to rotate around its axis, so as to adjust the gap between the two ends of the connecting pipe 300 and the first pipe 100 and the second pipe 200.

[0056] S5: When the gaps between the two ends of the connecting pipe 300 and the first pipe 100 and the second pipe 200 meet the corresponding welding qualification procedures, welding operations shall be performed on the two ends of the connecting pipe 300.

[0057] S6: After welding is completed, remove the axial rotation device of the connecting pipe and prepare for the installation and welding of the next section of connecting pipe 300.

[0058] This method for axial rotation of connecting pipes involves initially positioning the relative positions of the first pipe 100, connecting pipe 300, and second pipe 200 using the first and second mating parts 1 and 2. The magnetic connector 3 serves as the first rotation fulcrum, and the rotation drive 4 serves as the second rotation fulcrum. When the magnetic connector 3 is activated, the connecting pipe 300 is firmly attracted and connected to the first pipe 100 and second pipe 200 by magnetic force. At this point, the mechanical fixation of the connecting pipe 300 by the first and second mating parts 1 and 2 is released, allowing the connecting pipe 300 to maintain a stable connection under magnetic attraction. Supported by the first and second rotation fulcrums, the rotation drive 4, connected to the magnetic connector 3 through its output end, applies a rotational driving force around the connecting pipe 300's axis, driving the connecting pipe 300 to achieve axial rotation. Because the magnetic connector 3 provides sufficient friction between the connecting pipe 300 and the pipes on both sides, it ensures the stability of the connecting pipe 300's position during rotation, thus making the adjustment process smoother and more precise. Therefore, the axial rotation device for connecting pipes can precisely adjust the axial rotation angle and circumferential position of the connecting pipe 300, and precisely adjust the weld gap between the connecting pipe 300 and the pipes on both sides, so that the weld meets the requirements of the corresponding pipe welding qualification procedure, improves the welding quality of the connecting pipe 300 and the pipes on both sides, and has simple and safe operation procedures and strong applicability.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A device for axially rotating a connecting pipe, characterized in that, include: The first mating part (1) has one end detachably and fixedly connected to the outside of the first pipe (100), and the other end detachably and fixedly connected to the connecting pipe (300); The second fitting (2) has one end detachably and fixedly connected to the outside of the second pipe (200), and the other end detachably and fixedly connected to the connecting pipe (300); The axial rotation assembly includes a magnetic connector (3) and a rotation drive (4). The magnetic connector (3) is installed on the outside of the connecting pipe (300) as a first rotation fulcrum and has a magnetic state that connects the connecting pipe (300) to the first pipe (100) and the second pipe (200) on both sides, and a non-magnetic state that disconnects the connecting pipe (300) from the first pipe (100) and the second pipe (200) on both sides. The rotation drive (4) is disposed on the first mating member (1) and / or the second mating member (2) as a second rotation fulcrum. The output end of the rotation drive (4) is connected to the magnetic connector (3) and can apply a rotational driving force to the magnetic connector (3) so as to drive the connecting pipe (300) to rotate around the axis of the connecting pipe (300).

2. The axial rotation device for connecting pipes according to claim 1, characterized in that, The magnetic connector (3) is installed on the connecting pipe (300) near the first mating member (1), and the rotary drive member (4) is located on the first mating member (1), with its output end connected to the magnetic connector (3); or The magnetic connector (3) is installed on the connecting pipe (300) near the second coupling member (2), and the rotary drive member (4) is located on the second coupling member (2), with its output end connected to the connecting pipe (300).

3. The axial rotation device for connecting pipes according to claim 1, characterized in that, At least two axial rotation components are provided, at least two magnetic connectors (3) are installed at both ends of the connecting pipe (300), and at least two rotation drive components (4) are provided on the first matching component (1) and the second matching component (2), and are respectively connected to the magnetic connectors (3) on the adjacent sides, and can synchronously apply rotational driving force to the magnetic connectors (3).

4. The axial rotation device for connecting pipes according to claim 2, characterized in that, The magnetic connector (3) includes an electromagnet and a circuit controller. The circuit controller is disposed on the connecting pipe (300) and its output end is electrically connected to the electromagnet to control the energization and de-energization of the electromagnet. The electromagnet is installed on the connecting pipe (300).

5. The axial rotation device for connecting pipes according to claim 4, characterized in that, A magnetic switch is provided on the magnetic connector (3), and the magnetic switch is electrically connected to the circuit controller.

6. The axial rotation device for connecting pipes according to claim 1, characterized in that, The rotary drive (4) can selectively drive the connecting pipe (300) to rotate clockwise or counterclockwise around its axis.

7. The axial rotation device for connecting pipes according to claim 6, characterized in that, The rotary drive component (4) includes a hydraulic cylinder, a push rod, a switching component, and a linkage shaft. The hydraulic cylinder and the push rod are respectively disposed at both ends of the linkage shaft and are both mounted on the first mating component (1) or the second mating component (2). The switching component is disposed on the linkage shaft and can selectively engage the hydraulic cylinder or the push rod with the linkage shaft. The output ends of the hydraulic cylinder and the push rod can be connected to the magnetic connector (3).

8. The axial rotation device for connecting pipes according to any one of claims 1-7, characterized in that, Gaskets are provided at the connection points of the first fitting (1) and / or the second fitting (2) with the first pipe (100), the second pipe (200) and the connecting pipe (300).

9. The axial rotation device for connecting pipes according to any one of claims 1-7, characterized in that, The axial rotation device for the connecting pipe also includes a control component, which is electrically connected to the axial rotation assembly.

10. A method for axially rotating a connecting pipe, characterized in that, The axial rotation device for connecting pipes as described in any one of claims 1-9 includes the following steps: S1: The two ends of the connecting pipe (300) are respectively detachably and fixedly connected to the first pipe (100) and the second pipe (200) through the first fitting (1) and the second fitting (2); S2: Install the magnetic connector (3) on the connecting pipe (300), and install the rotary drive (4) on the first mating part (1) and / or the second mating part (2), with its output end connected to the magnetic connector (3); S3: Put the magnetic connector (3) into a magnetic state, and at the same time release the mechanical fixation of the first mating part (1) and the second mating part (2) on the connecting pipe (300), so that the connecting pipe (300) is in a rotatable state; S4: The rotary drive (4) drives the magnetic connector (3) to rotate the connecting pipe (300) around its axis to adjust the gap between the two ends of the connecting pipe (300) and the first pipe (100) and the second pipe (200); S5: When the gap between the two ends of the connecting pipe (300) and the first pipe (100) and the second pipe (200) meets the corresponding welding qualification procedure, welding operations are performed on the two ends of the connecting pipe (300); S6: After welding is completed, remove the axial rotation device of the connecting pipe and prepare for the installation and welding of the next section of the connecting pipe (300).

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