Pipeline opening aligning device and method

Abstract

The invention discloses a pipeline opening aligning device and method. The device comprises a stretching assembly, a first pipe clamping device and a second pipe clamping device, wherein the first pipe clamping device and the second pipe clamping device are connected with each other; the first pipe clamping device comprises a first frame assembly capable of being opened and closed and a first clamping piece assembly arranged in the first frame assembly. The second pipe clamping device comprises a second frame assembly capable of being opened and closed and a second clamping piece assembly arranged in the second frame assembly. The first clamping piece assembly and the second clamping piece assembly are connected through the stretching assembly, and the stretching assembly is hinged to the first frame assembly and the second frame assembly. The first clamping piece assembly and the second clamping piece assembly can be connected to pipelines to be aligned at the two ends in a sleeving mode respectively, and the stretching assembly stretches out and draws back to drive the first clamping piece assembly and the second clamping piece assembly to clamp the pipelines to be aligned at the two ends and drive the first pipe clamping device and the second pipe clamping device to move in the axial direction so as to change the axial distance between the pipelines to be aligned at the two ends. The device can realize gapless alignment of the to-be-aligned pipeline through an axial stretching function.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline construction in oil and gas fields, and in particular to a pipeline docking device and method. Background Art

[0002] During the construction of long-distance oil and gas pipelines, it is necessary to carry out segmented pipeline construction due to factors such as topography, crossing and spanning construction, section construction, segmented line sweeping, and segmented pressure testing. Finally, these segmented pipelines need to be welded together to form a complete pipeline. Therefore, a large number of dead-end (fixed-end) group welding construction is required in the construction of oil and gas pipelines. In the prior art, the dead-end connection of pipelines is achieved by setting connecting pipes, wherein the production of connecting pipes is a very critical link in pipeline construction, which directly affects the construction period and quality of pipeline construction; since the two end pipes that need to be connected by the dead-end cannot move axially and circumferentially, the size of the connecting pipe needs to be cut according to the measured spacing between the end faces of the two end pipes, and the connecting pipe is continuously tested after the groove of the connecting pipe is polished, and the excess length of the connecting pipe is continuously polished during the test installation process, so that the cut connecting pipe can be placed between the two end pipes that need to be connected by the dead-end, and welded to one section of the pipe. At this time, the connecting pipe and the other end of the pipe at the two ends cannot be welded due to the wide gap, and it is necessary to adopt the "temperature difference method" to wait for the shrinkage seam, that is, to assemble at a low temperature, wait for the temperature to rise, and then weld after the thermal expansion of the pipe reaches the gap requirement. Summary of the invention

[0003] The inventors of the present application have discovered that in the existing pipeline construction, when welding oil and gas pipelines, the "temperature difference method" is used, which requires waiting for the temperature to rise so that the pipelines expand due to heat, so that the mating pipes can meet the requirements for the mating gap. In addition, this method performs assembly when the temperature is relatively low, and the mating gap requirements are met by the thermal expansion of the pipelines. The achieved mating accuracy is difficult to meet the needs of automatic welding, and only manual or semi-automatic root welding can be performed, which has high requirements on the skill level of the welders, high labor intensity, and high labor costs.

[0004] In view of the above problems, the present invention is proposed to provide a pipeline connection device and method that overcomes the above problems or at least partially solves the above problems.

[0005] The pipe docking device provided in the embodiment of the present invention comprises: a stretching assembly, and a first pipe clamp and a second pipe clamp which are sequentially connected and have an adjustable axial spacing;

[0006] The first tube clamp comprises: a first frame assembly that can be opened and closed, and a first clip assembly disposed in the first frame assembly;

[0007] The second tube clamp comprises: a second frame assembly that can be opened and closed, and a second clip assembly disposed in the second frame assembly;

[0008] The first clip assembly is connected to the second clip assembly via a stretch assembly, and the stretch assembly is hinged to the first frame assembly and the second frame assembly;

[0009] The first clamp assembly and the second clamp assembly can be respectively sleeved on the two end pipes to be mated. The extension and retraction of the stretching assembly drives the first clamp assembly and the second clamp assembly to clamp the two end pipes to be mated, and drives the first tube clamp and the second tube clamp to move axially to change the axial distance between the two end pipes to be mated.

[0010] In an optional embodiment, the pipe docking device further includes: a plurality of misalignment adjustment components;

[0011] The misalignment adjustment components are evenly arranged on the first clamping piece component and the second clamping piece component, and the misalignment adjustment components can abut against the two end pipes to be aligned, and squeeze the outer walls of the two end pipes to be aligned when the stretching component is extended and retracted to adjust the misalignment of the two end pipes to be aligned.

[0012] In an optional embodiment, the misalignment adjustment assembly includes: a pressure wheel, a push rod cylinder, a pressure rod sleeve, a pressure rod, a pressure block and an adjustment screw;

[0013] The pressure rod sleeve is connected to the first clamping piece assembly or the second clamping piece assembly and is sleeved on the pressure rod. One end of the pressure rod is connected to the push rod oil cylinder. The pressure wheel is connected to the other end of the pressure rod through a pressure block and a pressure wheel shaft, and the pressure wheel can abut against the two ends of the pipes to be matched.

[0014] The adjusting screw is arranged in the threaded hole on the pressure rod, and one end is connected with the pressure block, so that the pressure block and the pressure wheel can be driven to move radially along the matching device by screwing in and out of the adjusting screw.

[0015] In an optional embodiment, the misalignment adjustment assembly further includes: an adjustment gasket, and the adjustment gasket is arranged on the pressure rod sleeve.

[0016] In an optional embodiment, the pipe docking device also includes: a track assembly fixed to the end face of the second frame assembly close to the first frame assembly through a connecting rod, and the track assembly is used to install a welding device so that the welding device moves along the track assembly to weld the pipes at both ends.

[0017] In an optional embodiment, the misalignment adjustment component further comprises: a sensor;

[0018] The sensor is arranged on the pressure rod sleeve, and is used for sensing the position of the welding torch of the welding device, so as to control the retraction of the push rod oil cylinder to retract the pressure wheel based on the position information of the welding torch.

[0019] In an optional embodiment, the stretching assembly has a first hinge position with the first frame assembly and a second hinge position with the second frame assembly, and the distance between the first hinge position and the axis is greater than the distance between the second hinge position and the axis.

[0020] In an optional embodiment, the stretching assembly includes: a first connecting rod assembly, a first pulling plate, a stretching cylinder, a second pulling plate, and a second connecting rod assembly connected in sequence;

[0021] The first connecting rod assembly is connected to the first clip assembly and is hinged to the first frame assembly;

[0022] The second connecting rod assembly is connected to the second clip assembly and is hinged to the second frame assembly;

[0023] The extension and retraction of the stretching cylinder drives the first pull plate and the first connecting rod assembly to move, and drives the first clamp assembly and the first frame assembly to move through the first connecting rod assembly, and drives the second pull plate and the second connecting rod assembly to move, and drives the second clamp assembly and the second frame assembly to move through the second connecting rod assembly.

[0024] In an optional embodiment, the first clip assembly includes a plurality of first clips, the second clip assembly includes a plurality of second clips, and the first clips, the second clips and the stretching assembly are arranged correspondingly;

[0025] The first clip is connected to the first pull plate through a first connecting rod assembly; the second clip is connected to the second pull plate through a second connecting rod assembly.

[0026] In an optional embodiment, each first clip is connected to the corresponding first pull plate through at least two first connecting rod assemblies spaced apart along the axial direction;

[0027] Each second clip is connected to the corresponding second pull plate through at least two second connecting rod assemblies spaced apart along the axial direction.

[0028] In an optional embodiment, the inner layers of the first clamp and the second clamp are provided with rubber layers, and the rubber layers are provided with grooves.

[0029] In an optional embodiment, the first frame assembly includes a hinged first frame and a second frame, and the second frame assembly includes a hinged third frame and a fourth frame;

[0030] A first opening and closing cylinder assembly and a first locking assembly are provided between the first frame and the second frame to realize opening, closing and locking between the first frame and the second frame; a second opening and closing cylinder assembly and a second locking assembly are provided between the third frame and the fourth frame to realize opening, closing and locking between the third frame and the fourth frame;

[0031] A guide assembly is arranged between the first frame and the third frame, and between the second frame and the fourth frame, so as to guide the first tube clamp and the second tube clamp when they move axially.

[0032] Based on the same inventive concept, an embodiment of the present invention further provides a method for realizing pipe docking using the above-mentioned pipe docking device, comprising:

[0033] The pipe docking device is sleeved on the ends of the two pipes to be docked, and the first pipe clamp and the second pipe clamp are respectively locked with the two pipes to be docked;

[0034] The stretching assembly contracts to clamp the first clamp assembly and the second clamp assembly to the two ends of the pipes to be connected;

[0035] The stretching assembly continues to contract to drive the first tube gripper and the second tube gripper to move axially, so as to change the axial spacing between the two end pipes to be mated, so as to meet the requirements of the mating clearance.

[0036] In an optional embodiment, the alignment method further comprises: in the telescopic state of the telescopic assembly, the pressing wheel of the misalignment adjustment assembly squeezes the outer walls of the two ends of the pipes to be aligned to adjust the misalignment amount of the two ends of the pipes to be aligned;

[0037] And, after the two ends of the pipes to be matched meet the requirements of the matching gap, the adjusting screw of the misalignment adjustment assembly is screwed in or out to drive the pressing block and the pressing wheel to move radially along the pipes to be matched, so as to adjust the misalignment amount of the two ends of the pipes to be matched;

[0038] So that the two ends of the pipes to be connected can meet the requirements of misalignment accuracy.

[0039] In an optional embodiment, the docking method also includes: using a welding device arranged on a track to weld the pipes at both ends that meet the misalignment accuracy and docking gap, and when welding to the misalignment adjustment component, sensing the position of the welding torch of the welding device through a sensor, and controlling the push rod oil rod to retract the cylinder to retract the pressure wheel.

[0040] The beneficial effects of the above technical solution provided by the embodiment of the present invention include at least:

[0041] The pipe joint device provided by the embodiment of the present invention can clamp the first clamping piece assembly located in the first frame assembly and the second clamping piece assembly located in the second frame assembly with the pipes at both ends to be jointed by the extension and contraction of the stretching piece assembly. Since the stretching piece assembly is hinged with the first frame assembly of the first pipe clamp and the second frame assembly of the second pipe clamp, after the first clamping piece assembly and the second clamping piece assembly are clamped with the pipes at both ends to be jointed, the stretching piece assembly will continue to extend and contract, which will drive the first pipe clamp and the second pipe clamp to move axially, so as to drive the pipes at both ends clamped by the first clamping piece assembly and the second clamping piece assembly to move. It moves axially, thereby changing the axial spacing between the two ends of the pipes to be matched so that the requirements of the matching gap are met; the matching device can tighten the gap between the two ends of the pipes through its axial stretching function to achieve gapless matching, and compared with the existing method of shrinking the seam by using the "temperature difference method", it saves the time of using the rising temperature to make the pipe expand due to heat to reduce the matching gap, thereby improving the efficiency of pipe matching; at the same time, the device has a simple structure, does not need to set up additional devices such as anchors to stretch the pipes, and can adapt to pipes of different specifications to be matched by replacing different clip assemblies, and has strong applicability.

[0042] Furthermore, the pipe docking device is also provided with a misalignment adjustment component, so that when the stretching component is in the extended and retracted state, that is, when the pipe to be docked is stretched to meet the docking gap requirements, the outer wall of the pipe is squeezed by the misalignment adjustment component to adjust the misalignment amount of the pipes at both ends to be docked, thereby further improving the docking accuracy of the pipes at both ends so that they can meet the requirements of automatic welding.

[0043] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0044] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0046] Figure 1 It is a structural schematic diagram of a pipeline docking device in an embodiment of the present invention;

[0047] Figure 2 Schematic diagram of the connection of the connecting rod, the pull plate and the clip in the embodiment of the present invention;

[0048] Figure 3Schematic diagram of the structure of the misalignment adjustment component in an embodiment of the present invention.

[0049] Description of reference numerals:

[0050] 1-first frame assembly, 2-first clip assembly, 3-stretching assembly, 4-second clip assembly, 5-misalignment adjustment assembly, 6-track assembly, 7-welding device, 8-connecting rod, 9-second frame assembly, 10-guide sleeve, 11-guide shaft, 12-first locking assembly, 13-hinge shaft, 14-first opening and closing cylinder assembly, 15-second opening and closing cylinder assembly, 16-pipeline, 17-rib plate;

[0051] 101-first frame, 102-second frame, 21-first clip, 31-second connecting rod assembly, 32-second pull plate, 33-stretching cylinder, 34-first connecting rod assembly, 35-first pull plate, 36-pull plate pin, 37-connecting rod pin, 38-clip pin, 41-second clip, 91-third frame, 92-fourth frame;

[0052] 51-push rod cylinder; 52-pressure rod sleeve; 53-pressure rod; 54-adjusting screw; 55-pressure wheel; 56-pressure block; 57-pressure wheel shaft; 58-adjusting gasket. DETAILED DESCRIPTION

[0053] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0054] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0055] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] The inventors have found that the existing pipeline dead-end construction, when welding oil and gas pipelines, uses the "temperature difference method" which requires waiting for the temperature to rise so that the pipeline expands due to heat, so that the mating pipes meet the requirements for the mating gap. In addition, this method performs assembly at a relatively low temperature, and the mating gap requirements are met by the thermal expansion of the pipeline. The achieved mating accuracy is difficult to meet the needs of automatic welding, and only manual or semi-automatic root welding can be performed, which has high requirements on the skill level of the welder, high labor intensity, and high labor costs.

[0057] In order to solve the problems existing in the prior art, an embodiment of the present invention provides a pipeline docking device and method.

[0058] The pipe connection device provided in the embodiment of the present invention refers to Figure 1 As shown, it comprises: a stretching assembly 3, and a first pipe clamp and a second pipe clamp which are connected in sequence and have an adjustable axial spacing;

[0059] The first tube clamp comprises: a first frame assembly 1 which can be opened and closed, and a first clip assembly 2 which is arranged in the first frame assembly 1;

[0060] The second tube clamp comprises: a second frame assembly 9 which can be opened and closed, and a second clip assembly 4 which is arranged in the second frame assembly 9;

[0061] The first clip assembly 2 is connected to the second clip assembly 4 via a stretch assembly 3, and the stretch assembly 3 is hinged to the first frame assembly 1 and the second frame assembly 9;

[0062] The first clamping piece assembly 2 and the second clamping piece assembly 4 can be respectively sleeved on the two end pipes 16 to be mated. The extension and contraction of the stretching assembly 3 drives the first clamping piece assembly 2 and the second clamping piece assembly 4 to clamp the two end pipes 16 to be mated, and drives the first clamping piece and the second clamping piece to move axially to change the axial distance between the two end pipes 16 to be mated.

[0063] The docking device provided by the embodiment of the present invention can clamp the first clamping assembly 2 located in the first frame assembly 1 and the second clamping assembly 4 located in the second frame assembly 9 with the two ends of the pipe to be docked by the extension and contraction of the stretching assembly 3. Since the stretching assembly 3 is hinged with the first frame assembly 1 of the first pipe clamp and the second frame assembly 9 of the second pipe clamp, after the first clamping assembly 2 and the second clamping assembly 4 are clamped with the two ends of the pipe to be docked, when the stretching assembly 3 continues to extend and contract, it will drive the first pipe clamp and the second pipe clamp to move axially, so as to drive the first clamping assembly 2 and the second clamping assembly 4 to clamp. The pipes at both ends are moved axially, thereby changing the axial spacing between the pipes at both ends to meet the requirements of the mating gap; the mating device can tighten the gap between the two pipes through its axial stretching function to achieve gap-free mating of the pipes, and compared with the existing method of shrinking the joints by using the "temperature difference method", it saves the time of using the rising temperature to make the pipe expand due to heat to reduce the mating gap, and improves the efficiency of the dead-end mating of the pipes; at the same time, the device has a simple structure, does not need to set up additional devices such as anchors to stretch the pipes, and can adapt to pipes of different specifications to be mated by replacing different clip assemblies, and has strong applicability.

[0064] Optional, see Figure 1 As shown, the first frame assembly 1 includes a hinged first frame 101 and a second frame 102, and the second frame assembly 9 includes a hinged third frame 91 and a fourth frame 92;

[0065] A first opening and closing cylinder assembly 14 and a first locking assembly 12 are provided between the first frame 101 and the second frame 102 to realize the opening, closing and locking between the first frame 101 and the second frame 102; a second opening and closing cylinder assembly 15 and a second locking assembly (not shown in the figure) are provided between the third frame 91 and the fourth frame 92 to realize the opening, closing and locking between the third frame 91 and the fourth frame 92;

[0066] A guide assembly is provided between the first frame 101 and the third frame 91 , and between the second frame 102 and the fourth frame 92 , so as to guide the first tube clamp and the second tube clamp when they move in the axial direction.

[0067] Among them, the first frame 101, the second frame 102, the third frame 91 and the fourth frame 92 are semicircular frame structures. Taking the opening, closing and locking of the first frame 101 and the second frame 102 as an example, the structure of the pipeline docking device is explained as follows: hinge holes are correspondingly arranged on the first frame 101 and the second frame 102, and the hinge shaft 13 passes through the hinge hole to realize the hinge between the first frame 101 and the second frame 102, and a first opening and closing cylinder assembly 14 is arranged on the side where the hinge holes are arranged on the first frame 101 and the second frame 102, and a first locking assembly 12 is arranged on the side opposite to the side where the first opening and closing cylinder assembly 14 is arranged, wherein the first locking assembly 12 is arranged on the inner side of the end face of the first frame assembly 1, which can reduce the axial dimension of the pipeline docking device and make the overall structure more compact. Optionally, the locking assembly can be a bidirectional hydraulic cylinder, and the locking and opening of the first frame assembly 1 are realized by piston rods extending from both ends of the bidirectional hydraulic cylinder.

[0068] It should be noted that the opening, closing and locking structures of the third frame 91 and the fourth frame 92 are the same as the opening, closing and locking structures of the first frame 101 and the second frame 102 described above, and will not be elaborated in detail in the embodiment of the present invention.

[0069] When installing the docking device and the pipeline, open the first locking assembly 12 and the second locking assembly, control the first opening and closing cylinder assembly 14 to retract the cylinder so that the first frame 101 and the second frame 102 are opened, and control the second opening and closing cylinder assembly 15 to retract the cylinder so that the third frame 91 and the fourth frame 92 are opened, then the docking device is sleeved on the two end pipes to be docked, control the first opening and closing cylinder assembly 14 and the second opening and closing cylinder assembly 15 to extend the cylinder to close the docking device, and lock it through the first locking assembly 12 and the second locking assembly to complete the installation of the docking device and the pipeline, and the frame assembly of the pipe clamp is closed into a full circle by locking the locking assembly, so that when the clamp assembly clamps the pipeline, it can bear the reaction force of the pipeline on the clamp assembly.

[0070] Optionally, the guide assembly may include a plurality of guide sleeves 10 and guide shafts 11 matched with the guide sleeves 10, wherein the guide sleeves 10 are correspondingly arranged on the first frame assembly 1 and the second frame assembly 9, so as to guide the first tube clamp and the second tube clamp through the cooperation of the guide sleeves 10 and the guide shafts 11 when the first tube clamp and the second tube clamp move axially; optionally, ribs 17 may also be arranged on the first frame 101, the second frame 102, the third frame 91 and the fourth frame 92 to improve the strength of each frame of each tube clamp.

[0071] In an optional embodiment, the docking device of the embodiment of the present invention may further include: a plurality of misalignment adjustment components 5;

[0072] The misalignment adjustment component 5 is evenly arranged on the first clamp component 2 and the second clamp component 4, and the misalignment adjustment component 5 can abut against the two end pipes to be matched, and squeeze the outer walls of the two end pipes to be matched when the stretching component 3 is extended and retracted to adjust the misalignment of the two end pipes to be matched.

[0073] The docking device is provided with a misalignment adjustment component 5, which can squeeze the outer wall of the pipe to be docked to adjust the misalignment of the two ends of the pipe to be docked when the stretching component 3 is extended or retracted, that is, during the stretching process of the pipe to be docked to meet the docking gap requirement, thereby improving the docking accuracy of the pipe and meeting the requirements of automatic welding.

[0074] Further, the misalignment adjustment component 5 of this embodiment, referring to Figure 3 As shown, it includes: a pressure wheel 55, a push rod cylinder 51, a pressure rod sleeve 52, a pressure rod 53, a pressure block 56 and an adjustment screw 54;

[0075] The pressure rod sleeve 52 is connected to the first clamping piece assembly 2 or the second clamping piece assembly 4, and is sleeved on the pressure rod 53. One end of the pressure rod 53 is connected to the push rod cylinder 51. The pressure wheel is connected to the other end of the pressure rod through the pressure block 56 and the pressure wheel shaft 57. The pressure wheel 55 can abut against the two ends of the pipes to be matched.

[0076] The adjusting screw 54 is disposed in a threaded hole on the pressure rod 53 , and one end of the adjusting screw 54 is connected to the pressure block 56 , so that the pressure block and the pressure wheel 55 can be driven to move radially along the mating device by screwing the adjusting screw 54 in and out.

[0077] Since a plurality of misalignment adjustment components 5 are evenly arranged on the first clamp component 2 and the second clamp component 4, and the pressure wheels of the misalignment adjustment components 5 can abut against the two end pipes to be matched, when the stretching component is in the extended and retracted state, the pressure of the pressure wheel is provided by the clamp component (including the first clamp component 2 and the second clamp component 4), and as the clamp component and the pipe are tightly clamped, the pressure wheel 55 fixed on the pressure rod also clamps the pipe, and in the process of continued stretching of the stretching component 3, the pipes at both ends are pulled to produce displacement through the matching device, and in this process, each pressure wheel 55 squeezes the pipe to make the pipes at both ends tend to be coaxial, so as to achieve the purpose of adjusting the gap between the pipes at both ends and matching the pipes; and after the pipes at both ends meet the matching gap, if the matching accuracy still does not meet the accuracy requirement, the matching accuracy of the pipes can be further adjusted by adjusting the adjustment screw 54 of the misalignment adjustment component 5 separately until the accuracy requirement of the misalignment amount is met.

[0078] Furthermore, the misalignment adjustment assembly 5 further includes an adjustment gasket 58 , which is disposed on the pressure rod sleeve 52 .

[0079] The adjustment gasket 58 is arranged on the pressure rod sleeve to change the distance between the pressure wheel 55 and the pipe 11 to be matched after the pressure rod sleeve 52 is connected to the clamping piece assembly, that is, the adjustment gasket 58 can adjust the misalignment adjustment range of the misalignment adjustment assembly 5 on the pipe.

[0080] In an optional embodiment, the docking device may also include: a track assembly 6 fixed to the end surface of the second frame assembly 9 close to the first frame assembly 1 through a connecting rod 8, and the track assembly 6 is used to install a welding device 7 so that the welding device 7 moves along the track assembly 6 to weld the pipes at both ends.

[0081] Among them, the pipeline assembly may include two 180-degree semicircular tracks that can be opened and closed and fixed on the end surface of the second frame. The embodiment of the present invention does not specifically limit the specific structure of the pipeline assembly, as long as it can be equipped with a welding device 7 that can realize automatic welding to realize automatic welding of the pipelines at both ends; if the pipeline assembly can be a V-shaped track, the welding device 7 may include: a V-shaped gear and a driving gear that can be adapted to the V-shaped track and mounted on the V-shaped track through the V-shaped gear, and in the working state, the driving gear is engaged with the gear ring of the V-shaped guide rail to make the welding device 7 move along the track assembly 6, thereby driving the welding torch of the welding device 7 to perform circumferential welding around the pipeline 16. And the welding device 7 may also include a weld tracking assembly to sense the welding position of the welding torch, and adjust the position of the welding torch according to the relationship between the sensed welding position and the preset welding position, so as to ensure that the welding torch of the welding device 7 is always in the correct welding position. Among them, for the welding device 7 used in the embodiment of the present invention, as long as it can be adapted to the track assembly 6 to achieve the welding effect on the pipeline.

[0082] Optionally, the misalignment adjustment component 5 may further include: a sensor (not shown in the figure);

[0083] The sensor is arranged on the pressure rod sleeve 52 to sense the position of the welding torch of the welding device 7, so as to control the telescopic cylinder to retract the pressure wheel based on the position information of the welding torch, so as to avoid the presence of the pressure wheel 55 affecting the welding stroke of the welding device 7 on the pipeline.

[0084] Optionally, the stretching assembly 3 has a first hinge position (not shown in the figure) with the first frame assembly 1, and has a second hinge position (not shown in the figure) with the second frame assembly 9. When the track assembly 6 is provided on the second frame assembly 9 of the docking device, the distance between the first hinge position and the axis of the docking device can be greater than the distance between the second hinge position and the axis; at this time, when the docking device and the pipe to be docked are installed, the gap between the first clamp assembly 2 and the pipe is greater than the gap between the second clamp assembly 4 and the pipe, which can ensure that when the stretching cylinder 33 is retracted, the second clamp assembly 4 is clamped with the pipe first, thereby avoiding the situation that it is uncertain whether the first clamp or the second clamp will hold the pipe first when the stretching cylinder 33 is retracted, so as to ensure that the welding device 7 mounted on the track assembly 6 is near the weld of the pipe to be welded.

[0085] Further, see Figure 1 and Figure 2 As shown, the stretching assembly 3 of the docking device of this embodiment includes: a first connecting rod assembly 34, a first pulling plate 35, a stretching cylinder 33, a second pulling plate 32 and a second connecting rod assembly 31 which are connected in sequence;

[0086] The first connecting rod assembly 34 is connected to the first clip assembly 2 and is hinged to the first frame assembly 1;

[0087] The second connecting rod assembly 31 is connected to the second clip assembly 4 and is hinged to the second frame assembly 9;

[0088] The extension and retraction of the stretching cylinder 33 drives the first pull plate 34 and the first connecting rod assembly 34 to move, and drives the first clamping assembly 2 and the first frame assembly 1 to move through the first connecting rod assembly 34; and drives the second pull plate 32 and the second connecting rod assembly 31 to move, and drives the second clamping assembly 4 and the second frame assembly 9 to move through the second connecting rod assembly 31.

[0089] Optional, see Figure 2 As shown, the first clip assembly 2 includes a plurality of first clips 21, the second clip assembly 4 includes a plurality of second clips 41, and the first clips 21, the second clips 41 and the stretching assembly 3 are arranged correspondingly;

[0090] The first clamping piece 21 is connected to the first pull plate 35 through the first connecting rod assembly 34 ; the second clamping piece 41 is connected to the second pull plate 32 through the second connecting rod assembly 31 .

[0091] Specifically, the first clamp assembly 2 and the second clamp assembly 4 may respectively include a plurality of clamps, and the plurality of clamps are arranged in a full circle within the first frame assembly 1 or the second frame assembly 9 to generate sufficient friction with the pipe 16, so as to pull the pipes 16 at both ends to move axially when the telescopic cylinder is in the telescopic state, thereby realizing axial gap-free adjustment of the docking; preferably, the first clamp 21 and the second clamp 41 are respectively set to 4.

[0092] The stretching cylinder 33 connects the clamps in the first clamp and the second clamp together through a pull plate and a connecting rod; wherein the connecting rod assembly may include two connecting rods, Figure 3 As shown, the connection relationship between the second clip, the second connecting rod and the second pull plate is exemplified as follows: the second clip 41 and the second connecting rod 31 are connected via a clip pin 38, the second connecting rod 31 and the second pull plate 32 are connected via a pull plate pin 36, and the second connecting rod 31 is hinged to the second frame assembly 9 via a connecting rod pin 37.

[0093] It should be noted that the first clamp 21 and the second clamp 41 are arranged correspondingly, and a group of correspondingly arranged clamps are connected by a stretching component 3; each clamp can be provided with multiple groups of misalignment adjustment components 5, such as each clamp can be provided with 2 groups of misalignment adjustment components 5, when the first clamp and the second clamp are set to 4, then one circle of the matching device is provided with 8 groups of misalignment adjustment components 5.

[0094] Optional, see Figure 1 and Figure 2 As shown, each first clip 21 is connected to the corresponding first pull plate 35 through at least two first connecting rod assemblies 34 spaced apart along the axial direction;

[0095] Each second clip 41 is connected to the corresponding second pull plate 32 via at least two second connecting rod assemblies 31 spaced apart along the axial direction.

[0096] That is, each of the first clamp 21 and the second clamp 41 is connected to the pull plate through at least two groups of connecting rod assemblies, that is, at least two groups of hinge points are set between the clamp and the connecting rod assembly, and a stable parallelogram structure can be formed between the multiple groups of connecting rods, which can not only improve the overall structural strength of the pipeline docking device, but also enable the clamp to remain parallel to the pipeline to prevent the clamp from swinging, thereby enabling the clamp to pull the pipeline axially to move when the stretching assembly is working.

[0097] Furthermore, the inner layers of the first clamping piece 21 and the second clamping piece 41 are provided with a rubber layer (not shown in the figure), and the rubber layers of the clamping pieces are provided with grooves (not shown in the figure).

[0098] Specifically, the rubber layer of the inner layer of the first clamp 21 and the second clamp 41 can be a vulcanized rubber layer, and the inner diameter of the rubber layer can be consistent with the outer diameter of the pipe 16, so as to ensure that the first clamp 21 and the second clamp 41 have a certain positive pressure with the pipe 16 during construction. At the same time, the inner layer of the first clamp 21 and the second clamp 41 is set as a rubber layer to increase the friction with the pipe; and the rubber layer structure is relatively soft to prevent the clamp (including the first clamp 21 and the second clamp 41) from damaging the anti-corrosion layer of the outer layer of the pipe 16 during the clamping process of the pipe, and the structure of the rubber layer can compensate for the roundness error of the pipe to a certain extent. Among them, the specific size of the rubber layer, such as thickness and hardness, can be related to the size of the designed tensile force, that is, when the tensile force required for pipe stretching is greater, the friction generated between the clamp and the pipe is greater, and the thickness of the rubber layer required at this time is thicker; the specific size of the rubber layer can be selected according to actual needs, and the embodiment of the present invention does not make specific restrictions on this.

[0099] Since the pipeline 16 is mostly located outdoors, impurities such as mud and sand are inevitably present on the surface of the pipeline 16. When the pipeline is stretched, the presence of these impurities can easily cause slippage between the pipeline 16 and the clip, thereby affecting the clamping between the clip and the pipeline. Grooves are provided on the inner layer of the clip, so that impurities can enter the grooves during the friction between the clip and the pipeline 16, thereby ensuring the friction between the clip and the pipeline 16.

[0100] Optional, see Figure 1 As shown, a groove is provided on each frame of each tube gripper at a position corresponding to the position of the stretching assembly to prevent the stretching cylinder from interfering with the frame when the stretching cylinder is extended or retracted.

[0101] With respect to the pipe docking device provided in the embodiment of the present invention, taking the Φ1219mm pipe docking construction as an example, the process of using the pipe docking device for the pipe docking construction can be as follows:

[0102] The first step is hoisting. First, use a crane or a pipe-lifting machine to make the two ends of the pipes 16 to be matched roughly in the same plane, and use the crane to hoist the matching device to the matching position of the pipe 16. Open the locking assembly of the matching device (including: the first locking assembly 12 and the second locking assembly), and retract the opening and closing cylinder assembly (including: the first opening and closing cylinder assembly 14 and the second opening and closing cylinder assembly 15) to open the first frame assembly 1 and the second frame assembly 9 of the matching device, so that the matching device falls to a specific position at the matching position of the pipe 16. After the matching device falls to a specific position, the opening and closing assembly is controlled to extend the cylinder to close the matching device, and the locking assembly is used to lock the matching device in place.

[0103] The second step is to align the pipes. After the aligning device is in place, the stretching cylinder 34 of the stretching assembly 3 is controlled to shrink, and the clamp is driven to radially squeeze the pipe by pulling the pull plate (including the first pull plate 35 and the second pull plate 32) and the connecting rod assembly (including the first connecting rod assembly and the second connecting rod assembly). As the shrinking distance (i.e., the pulling force) of the stretching cylinder 33 increases, the clamping force and friction force of the clamp on the pipe also increase continuously. After the friction force between the clamp and the pipe and the pulling force of the stretching cylinder 33 reach a dynamic balance, the stretching cylinder 33 continues to shrink to drive the first clamp and the second clamp to move axially, and pull the clamped pipe 16 to be coaxial and move to the center. At this time, the pressure wheel of the misalignment adjustment assembly 5 fixed on the clamp tightens the pipe ends on both sides to realize the aligning misalignment adjustment function. As the displacement of the pipe increases, the gap between the pipes at both ends is shortened, so that the pipes at both ends meet the aligning gap requirements.

[0104] The third step is misalignment adjustment. During the stretching process of the stretching cylinder 33, due to the large positive pressure between the clamp and the pipe, the squeezing of the pressure wheel 55 and the pipe can basically meet the misalignment requirements of the pipe. In order to prevent the misalignment of the two pipes from failing to meet the automatic welding requirements due to the ovality error during pipe processing, the misalignment of the pipes can be adjusted steplessly through the adjustment screws 5-4 of the misalignment adjustment assembly 5, thereby meeting the misalignment accuracy requirements of the pipes.

[0105] Step 4: Welding positioning: The welding device 7 is installed on the track assembly 6 of the mating device, and the position of the welding device 7 is adjusted so that it is located at the initial welding position.

[0106] Step 5: Welding. After the welding device 7 is positioned, the welding torch is placed in the starting position according to the welding process. The welding device first welds the exposed part of the pipe mouth (i.e., the part without the misalignment adjustment component 5). When welding to the misalignment adjustment component 5, the sensor set on the pressure rod sleeve is used to sense the position of the welding torch, and the push rod cylinder 51 is controlled to retract the pressure wheel, so that the welding device 7 can be used to perform full-position root welding, and then the filling and cover welding of the pipeline are completed in sequence until the dead-end welding is completed.

[0107] For pipes of other diameters, such as pipes with a diameter of Φ1016mm, the process of performing gapless butt welding using the butt-joint device of the embodiment of the present invention is the same as above, and only the clips of the corresponding diameter need to be replaced.

[0108] The pipe joint device provided by the embodiment of the present invention can use its stretching function to pull the two ends of the pipes to be joined to move during the construction of the dead end of the pipes to shorten the joint gap at both ends of the pipes, that is, the stretching cylinder shrinks, the pull plate is pulled and the clamp is pressed down to clamp the pipe. Through the lever action, the greater the pulling force of the stretching cylinder shrinks, the greater the positive pressure of the clamp on the pipe. Finally, sufficient friction is generated between the clamps arranged in a whole circle and the pipe. As the stretching cylinder continues to shrink, the pipes at both ends are pulled to move relatively, so that the axial gapless adjustment of the pipes at both ends is achieved, saving the time of making the pipes expand due to heat to reduce the joint gap. The device is provided with a misalignment adjustment component, which can adjust the misalignment of the matched pipes to meet the automatic welding requirements. At the same time, the joint device can be equipped with a welding device to weld the pipes after the pipe joint is completed; that is, the device can realize full-line automatic welding of the pipes, reduce labor costs, and improve welding quality and construction efficiency of the dead end of the pipes.

[0109] Based on the same inventive concept, an embodiment of the present invention provides a pipeline docking method, which is implemented using the above docking device and includes:

[0110] The pipe docking device is sleeved on the ends of the two pipes to be docked, and the first pipe clamp and the second pipe clamp are respectively locked with the two pipes to be docked;

[0111] The stretching assembly contracts to clamp the first clamp assembly and the second clamp assembly to the two ends of the pipes to be connected;

[0112] The stretching assembly continues to contract to drive the first tube gripper and the second tube gripper to move axially, so as to change the axial spacing between the two end pipes to be mated, so as to meet the requirements of the mating clearance.

[0113] Furthermore, the pipe connection method of this embodiment further includes: in the telescopic state of the telescopic component, the pressing wheel of the misalignment adjustment component squeezes the outer walls of the pipes at both ends to be connected, so as to adjust the misalignment amount of the pipes at both ends to be connected;

[0114] And, after the two ends of the pipes to be matched meet the requirements of the matching gap, the adjusting screw of the misalignment adjustment assembly is screwed in or out to drive the pressing block and the pressing wheel to move radially along the pipes to be matched, so as to adjust the misalignment amount of the two ends of the pipes to be matched;

[0115] So that the two ends of the pipes to be connected can meet the requirements of misalignment accuracy.

[0116] Further, in a state where the pipeline docking device includes a track assembly, the pipeline docking method further includes:

[0117] The welding device arranged on the track is used to weld the pipes at both ends that meet the misalignment accuracy and the joint gap. When welding to the misalignment adjustment component, the sensor senses the position of the welding torch of the welding device, and controls the push rod oil rod to retract the cylinder to retract the pressure wheel.

[0118] Regarding the pipeline docking method in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the pipeline docking device, and will not be elaborated here.

[0119] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to the specific order or hierarchy described.

[0120] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0121] The above description includes examples of one or more embodiments. Of course, it is impossible to describe all possible combinations of components or methods for the purpose of describing the above embodiments, but it should be recognized by those skilled in the art that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to cover all such changes, modifications and variations that fall within the scope of protection of the appended claims. In addition, with respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", just as "including," is explained as a transitional word in the claims. In addition, any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

Claims

1. A pipe docking device, characterized in that: include: A stretching assembly, and a first tube gripper and a second tube gripper connected in sequence and having an adjustable axial spacing; The first tube clamp comprises: a first frame assembly that can be opened and closed, and a first clip assembly disposed in the first frame assembly; The second tube clamp comprises: a second frame assembly that can be opened and closed, and a second clip assembly disposed in the second frame assembly; The first clip assembly is connected to the second clip assembly via a stretch assembly, and the stretch assembly is hinged to the first frame assembly and the second frame assembly; The first clamp assembly and the second clamp assembly can be respectively sleeved on the two end pipes to be mated. The extension and retraction of the stretching assembly drives the first clamp assembly and the second clamp assembly to clamp the two end pipes to be mated, and drives the first tube clamp and the second tube clamp to move axially to change the axial distance between the two end pipes to be mated.

2. The pipe connection device according to claim 1, characterized in that: Also includes: Multiple misalignment adjustment components; The misalignment adjustment components are evenly arranged on the first clamping piece component and the second clamping piece component, and the misalignment adjustment components can abut against the two end pipes to be aligned, and squeeze the outer walls of the two end pipes to be aligned when the stretching component is extended and retracted to adjust the misalignment of the two end pipes to be aligned.

3. The pipe connection device according to claim 2, characterized in that: The misalignment adjustment assembly comprises: a pressure wheel, a push rod oil cylinder, a pressure rod sleeve, a pressure rod, a pressure block and an adjustment screw; The pressure rod sleeve is connected to the first clamping piece assembly or the second clamping piece assembly and is sleeved on the pressure rod. One end of the pressure rod is connected to the push rod oil cylinder. The pressure wheel is connected to the other end of the pressure rod through a pressure block and a pressure wheel shaft, and the pressure wheel can abut against the two ends of the pipes to be matched. The adjusting screw is arranged in the threaded hole on the pressure rod, and one end is connected with the pressure block, so that the pressure block and the pressure wheel can be driven to move radially along the matching device by screwing in and out of the adjusting screw.

4. The pipe connection device according to claim 3, characterized in that: The misalignment adjustment assembly further comprises an adjustment gasket, and the adjustment gasket is arranged on the pressure rod sleeve.

5. The pipe connection device according to claim 3, characterized in that: Also includes: A track assembly is fixed to the end surface of the second frame assembly close to the first frame assembly through a connecting rod. The track assembly is used to install a welding device so that the welding device moves along the track assembly to weld the pipes at both ends.

6. The pipe connection device according to claim 5, characterized in that: The misalignment adjustment component further includes: a sensor; The sensor is arranged on the pressure rod sleeve, and is used for sensing the position of the welding torch of the welding device, so as to control the retraction of the push rod oil cylinder to retract the pressure wheel based on the position information of the welding torch.

7. The pipe connection device according to claim 5, characterized in that: The stretching assembly has a first hinge position with the first frame assembly and a second hinge position with the second frame assembly, and the distance between the first hinge position and the axis is greater than the distance between the second hinge position and the axis.

8. The pipe docking device according to any one of claims 1 to 7, characterized in that: The stretching assembly comprises: a first connecting rod assembly, a first pulling plate, a stretching oil cylinder, a second pulling plate and a second connecting rod assembly which are connected in sequence; The first connecting rod assembly is connected to the first clip assembly and is hinged to the first frame assembly; The second connecting rod assembly is connected to the second clip assembly and is hinged to the second frame assembly; The extension and retraction of the stretching cylinder drives the first pull plate and the first connecting rod assembly to move, and drives the first clamp assembly and the first frame assembly to move through the first connecting rod assembly, and drives the second pull plate and the second connecting rod assembly to move, and drives the second clamp assembly and the second frame assembly to move through the second connecting rod assembly.

9. The pipe connection device according to claim 8, characterized in that: The first clip assembly includes a plurality of first clips, the second clip assembly includes a plurality of second clips, and the first clips, the second clips and the stretching assembly are arranged correspondingly; The first clip is connected to the first pull plate through a first connecting rod assembly; the second clip is connected to the second pull plate through a second connecting rod assembly.

10. The pipe connection device according to claim 9, characterized in that: Each first clip is connected to the corresponding first pull plate through at least two first connecting rod assemblies spaced apart along the axis direction; Each second clip is connected to the corresponding second pull plate through at least two second connecting rod assemblies spaced apart along the axial direction.

11. The pipe connection device according to claim 10, characterized in that: The inner layers of the first clamp and the second clamp are provided with rubber layers, and grooves are provided on the rubber layers.

12. The pipe connection device according to any one of claims 1 to 7, characterized in that: The first frame assembly includes a hinged first frame and a second frame, and the second frame assembly includes a hinged third frame and a fourth frame; A first opening and closing cylinder assembly and a first locking assembly are provided between the first frame and the second frame to realize opening, closing and locking between the first frame and the second frame; a second opening and closing cylinder assembly and a second locking assembly are provided between the third frame and the fourth frame to realize opening, closing and locking between the third frame and the fourth frame; A guide assembly is arranged between the first frame and the third frame, and between the second frame and the fourth frame, so as to guide the first tube clamp and the second tube clamp when they move axially.

13. A pipeline connection method, characterized in that: The method is implemented by using the pipeline docking device as claimed in any one of claims 1 to 12, comprising: The pipe docking device is sleeved on the ends of the two pipes to be docked, and the first pipe clamp and the second pipe clamp are respectively locked with the two pipes to be docked; The stretching assembly contracts to clamp the first clamp assembly and the second clamp assembly to the two ends of the pipes to be connected; The stretching assembly continues to contract to drive the first tube gripper and the second tube gripper to move axially, so as to change the axial spacing between the two end pipes to be mated, so as to meet the requirements of the mating clearance.

14. The pipeline connection method according to claim 13, characterized in that: Also includes: When the telescopic assembly is in the telescopic state, the pressing wheel of the misalignment adjustment assembly squeezes the outer walls of the pipes at both ends to be aligned, so as to adjust the misalignment of the pipes at both ends to be aligned; And, after the two ends of the pipes to be matched meet the requirements of the matching gap, the adjusting screw of the misalignment adjustment assembly is screwed in or out to drive the pressing block and the pressing wheel to move radially along the pipes to be matched, so as to adjust the misalignment amount of the two ends of the pipes to be matched; So that the two ends of the pipes to be connected can meet the requirements of misalignment accuracy.

15. The pipeline connection method according to claim 14, characterized in that: It also includes: using a welding device arranged on a track to weld the pipes at both ends that meet the misalignment accuracy and the gap, and when welding to the misalignment adjustment component, sensing the position of the welding torch of the welding device through a sensor, and controlling the push rod oil rod to retract the cylinder to retract the pressure wheel.

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