Pipeline external aligning device capable of carrying welding device and using method of pipeline external aligning device

Abstract

The invention discloses a pipeline external aligning device capable of carrying a welding device and a using method of the pipeline external aligning device. The pipeline external aligning device comprises a frame body capable of being opened and closed, a first fixing disc, a second fixing disc and a guide rail, wherein the first fixing disc and the second fixing disc are arranged in the frame body, and the guide rail is arranged on the end face of the second fixing disc. A plurality of pressing rod assemblies are slidably arranged on the circumferences of the inner walls of the first fixing disc and the second fixing disc, and a plurality of pressing disc assemblies are arranged on the side walls. The pressure plate assembly comprises a pressure plate, a plurality of wedge blocks arranged on the pressure plate, and a pressure plate oil cylinder arranged on the pressure plate; the wedge block abuts against the pressing rod assembly, the pressing rod assembly can be connected with a pipeline to be aligned in a sleeved mode, the pressing disc oil cylinder stretches out and draws back, the wedge block is driven to move in the axial direction of the pipeline outer aligning device, the pressing rod assembly is driven to move in the radial direction of the pipeline outer aligning device, and misalignment adjustment is conducted on the pipeline to be aligned. And the guide rail is used for carrying a welding device so as to weld the pipeline subjected to misalignment adjustment, and accurate opening alignment and efficient automatic welding of the pipeline can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of oil and gas field pipeline construction, and in particular to a pipeline external butt joint device capable of carrying a welding device and a use method thereof. Background Art

[0002] In the construction of oil and gas pipelines, when welding pipelines in mountainous areas with large slopes, the existing internal welding machines are difficult to meet the climbing requirements, and when welding straight pipelines to elbow pipelines, the existing internal welding machines cannot meet the welding requirements; therefore, when welding oil and gas pipelines, it is sometimes necessary to use an external butt welder to connect the pipelines. Since the existing external butt welder clamps the pipelines to be butted by the pipe clamp structures at both ends, and the pipe clamp structures at both ends of the external butt welder are connected by a connecting rod, after the external butt welder is used to assemble the pipelines, when the assembled pipelines are welded, the existence of the connecting rod will block the stroke of the automatic welding torch. Therefore, argon arc welding is generally used for primer and manual electrode filling and covering for pipeline welding. However, this welding process has high requirements on the skill level of welders, requires high labor intensity, and has low efficiency. Summary of the invention

[0003] In view of the above problems, the present invention is proposed to provide a pipe outer joint device capable of carrying a welding device and a method of using the same, which overcomes the above problems or at least partially solves the above problems.

[0004] The pipe outer joint device capable of carrying a welding device provided in an embodiment of the present invention comprises: an openable and closable frame body, a first fixed plate and a second fixed plate arranged in the frame body, and a guide rail arranged on an end surface of the second fixed plate, wherein the end surface of the second fixed plate is an end surface close to the first fixed plate;

[0005] On the inner walls of the first fixed plate and the second fixed plate, a plurality of pressure rod assemblies are slidably arranged along the circumferential direction, and on the side walls of the first fixed plate and the second fixed plate, a plurality of pressure plate assemblies are arranged;

[0006] The pressure plate assembly includes a pressure plate, a plurality of wedges arranged on the pressure plate, and a pressure plate cylinder arranged on the pressure plate and connected to the first fixed plate or the second fixed plate at one end;

[0007] The wedge block is in contact with the pressure rod assembly, and the pressure rod assembly can be respectively sleeved with the pipes to be matched. The pressure plate oil cylinder is extended and retracted, driving the wedge block to move axially along the pipe outer matcher and driving the pressure rod assembly to move radially along the pipe outer matcher, so as to adjust the misalignment of the pipes to be matched;

[0008] The guide rail is used to carry a welding device to weld the pipe after misalignment adjustment.

[0009] In an optional embodiment, the pressure rod assembly includes: a pressure wheel, a pressure wheel seat, an expansion rod, and a pressure block;

[0010] The pressure wheel is arranged in the pressure wheel seat and abuts against the wedge block, the pressure wheel seat is connected to the expansion rod, and a spring is sleeved on the expansion rod;

[0011] When the pressure plate cylinder is in the retracted state, the wedge block squeezes the pressure wheel to drive the pressure wheel seat, the expansion rod and the pressure block to move radially along the pipe outer connector and compress the spring; when the pressure plate cylinder is in the extended state, the pressure wheel seat, the expansion rod and the pressure block are reset under the restoring force of the spring.

[0012] In an optional embodiment, the wedge block includes: a plurality of inclined surfaces connected in sequence and having different slopes, the inclined surfaces abut against the pressure wheel, and the slope of each inclined surface gradually decreases from away from the end surface of the pressure plate to close to the end surface of the pressure plate.

[0013] In an optional embodiment, an axial distance between a pressure block of the pressure rod assembly disposed on the first fixed plate and a pressure block of the pressure rod assembly disposed on the second fixed plate is less than 240 mm.

[0014] In an optional embodiment, the external pipe joint device further comprises: a plurality of support wheels;

[0015] The supporting wheel is arranged on the pressure plate, and is used for supporting the pipeline outer joint device and for making the pipeline outer joint device move axially.

[0016] In an optional embodiment, the supporting wheel is an electromagnetic brake wheel.

[0017] In an optional embodiment, the pressure plate assembly further includes a displacement sensor; the displacement sensor is disposed on the pressure plate cylinder and is used to detect the real-time displacement of the pressure plate cylinder.

[0018] In an optional embodiment, the frame body includes: a first frame and a second frame in a semicircular shape;

[0019] The first frame and the second frame are hinged, and an opening and closing cylinder and a locking assembly are arranged between the two to realize the opening, closing and locking of the first frame and the second frame.

[0020] In an optional embodiment, the guide rail includes two semicircular V-shaped guide rails.

[0021] In an optional embodiment, the pipe outer joint device further comprises: a welding device;

[0022] The welding device comprises: a slide, a driving gear and a plurality of V-shaped gears arranged on the side wall of the slide, and a welding wire reel, a wire feeding mechanism, an adjusting mechanism and a welding torch arranged on the slide;

[0023] The adjusting mechanism is used to adjust the position of the welding torch and the welding wire transmitted by the wire feeding mechanism so that the welding torch and the welding wire reach a preset welding position;

[0024] The slide seat is clamped on the V-shaped guide rail through a V-shaped gear, and when the driving gear is in a working state, the driving gear is meshed with the gear ring of the V-shaped guide rail to enable the welding device to move along the guide rail.

[0025] In an optional embodiment, a through hole is opened on the frame body for observing the pipeline and polishing the joints of the pipeline after welding.

[0026] Based on the same inventive concept, an embodiment of the present invention further provides a method for using the above-mentioned pipe outer butt joint device that can be equipped with a welding device, comprising:

[0027] The external jointing device is installed and locked on the two ends of the pipes to be joined, and the pressure plate cylinder is controlled to extend or retract, so as to drive the wedge block to move along the axial direction of the pipe to be joined and drive the pressure rod assembly to move along the radial direction of the pipe to adjust the misalignment of the two ends of the pipes to be joined, so that the two ends of the pipes meet the automatic welding joint accuracy requirements;

[0028] The welding device installed on the guide rail is started to move along the guide rail to weld the pipes at both ends that meet the automatic welding precision requirements.

[0029] The beneficial effects of the above technical solution provided by the embodiment of the present invention include at least:

[0030] The pipe outer joint device that can be equipped with a welding device provided in the embodiment of the present invention can be sleeved on the two end pipes to be matched, and can drive the wedge block to move axially along the pipe outer joint device and drive the pressure rod assembly to move radially along the pipe outer joint device through the extension and contraction of the pressure plate cylinder, so as to squeeze the pipe to adjust the misalignment amount of the pipes at both ends, and the pipe outer joint device can further adjust the misalignment amount of the pipes at both ends to be matched by independently controlling the extension and contraction of a certain pressure plate cylinder, so that the pipes at both ends can meet the requirements of automatic welding matching accuracy. Furthermore, the pipe outer joint device implemented in the present invention is provided with a guide rail that can be equipped with a welding device. After the matching accuracy of the pipes at both ends meets the requirements of automatic welding accuracy, the pipes at both ends are welded by using the welding device carried, so as to realize accurate matching and efficient automatic welding of the pipes, improve the efficiency of pipe connection, and reduce the cost and time required for manual welding. Compared with the existing pipe outer joint device connected by a connecting rod, the pipe outer joint device in the embodiment of the present invention has a compact structure and is suitable for connecting a straight pipe to an elbow pipe in pipe connection.

[0031] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or be 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.

[0032] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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:

[0034] Figure 1 It is a schematic diagram of the structure of the pipe outer butt joint device which can be equipped with a welding device in an embodiment of the present invention;

[0035] Figure 2 It is a partial structural schematic diagram of a pipe outer butt joint device that can be equipped with a welding device according to an embodiment of the present invention;

[0036] Figure 3 It is a structural schematic diagram of a pressure plate assembly in an embodiment of the present invention;

[0037] Figure 4 It is a structural schematic diagram of a wedge block and a pressure rod assembly in abutment state in an embodiment of the present invention;

[0038] Figure 5 Schematic diagram of the structure of a welding device in an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1-frame body, 2-opening and closing cylinder, 3-hinge pin, 4-pressure plate assembly, 5-pressure rod assembly, 6-support wheel, 7-welding device, 8-locking assembly, 9-pipeline, 10-first fixed plate, 11-second fixed plate, 12-guide rail;

[0041] 101-first frame, 102-second frame, 41-guide shaft, 42-pressure plate cylinder, 43-pressure plate, 44-wedge block, 45-round nut, 46-guide sleeve, 51-pressure block, 52-expansion rod, 53-pressure wheel, 54-pressure wheel seat, 71-wire reel, 72-slide seat, 73-drive gear, 74-V-gear, 75-welding torch, 76-clamp, 77-angle swing device, 78-cross slide, 79-wire feeding mechanism. DETAILED DESCRIPTION

[0042] 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.

[0043] 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.

[0044] 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.

[0045] The inventors of the present application have discovered that the existing external butt joint device uses argon arc welding for priming after pipe assembly, and the manual electrode filling and covering process is used for pipe welding, which requires a high level of welder skill, high labor intensity, and low efficiency.

[0046] In order to solve the problems existing in the prior art, an embodiment of the present invention provides a pipe outer joint device capable of carrying a welding device and a method of using the same.

[0047] The pipe outer joint device provided by the embodiment of the present invention can be equipped with a welding device, referring to Figures 1 to 3 As shown, it comprises: an openable frame body 1, a first fixed plate 10 and a second fixed plate 11 arranged in the frame body 1, and a guide rail 12 arranged on the end surface of the second fixed plate 11, wherein the end surface of the second fixed plate 11 provided with the guide rail 12 is close to the end surface of the first fixed plate 10;

[0048] On the inner walls of the first fixed plate 10 and the second fixed plate 11, a plurality of pressure rod assemblies 5 are slidably arranged along the circumferential direction, and on the end surfaces of the first fixed plate 10 and the second fixed plate 11, a plurality of pressure plate assemblies 4 are arranged;

[0049] The pressure plate assembly 4 includes a pressure plate 43, a plurality of wedges 44 disposed on the pressure plate 43, and a pressure plate cylinder 42 disposed on the pressure plate 43 and connected to the first fixed plate 10 or the second fixed plate 11 at one end;

[0050] The wedge block 44 abuts against the pressure rod assembly 5, and the pressure rod assembly 5 can be respectively sleeved with the pipe 9 to be matched, and the pressure plate cylinder 42 is extended and retracted, driving the wedge block 44 to move axially along the pipe outer matcher and driving the pressure rod assembly 5 to move radially along the pipe outer matcher, so as to adjust the misalignment of the pipe 9 to be matched;

[0051] The guide rail 12 is used to carry the welding device 7 to weld the pipe 9 after the misalignment adjustment.

[0052] The pipe outer joint device that can be equipped with a welding device provided in the embodiment of the present invention can be sleeved on the two end pipes 9 to be matched, and can drive the wedge block 44 to move axially along the pipe outer joint device and drive the pressure rod assembly 5 to move radially along the pipe outer joint device through the extension and contraction of the pressure plate cylinder 42, so as to squeeze the pipe to adjust the misalignment amount of the pipes at both ends, and the pipe outer joint device can adjust the misalignment amount of the pipes at both ends to be matched by independently controlling the extension and contraction of a certain pressure plate cylinder 42, so that the pipes at both ends can meet the requirements of automatic welding matching accuracy. Furthermore, the pipe outer joint device implemented in the present invention is provided with a guide rail 12 that can be equipped with a welding device. After the matching accuracy of the pipes at both ends meets the requirements of automatic welding accuracy, the pipes at both ends are welded by using the welding device carried, so as to realize accurate matching and efficient automatic welding of the pipes, improve the efficiency of pipe connection, and reduce the cost and time required for manual welding. Compared with the existing pipe outer joint device connected by a connecting rod, the pipe outer joint device in the embodiment of the present invention has a compact structure and is suitable for connecting a straight pipe to an elbow pipe in pipe connection.

[0053] Further, see Figure 1 As shown, the frame body 1 includes: a semicircular first frame 101 and a second frame 102;

[0054] The first frame 101 and the second frame 102 are hinged, and an opening and closing cylinder 2 and a locking assembly 8 are arranged between the two to achieve the opening, closing and locking of the first frame 101 and the second frame 102 .

[0055] Among them, the first frame 101 and the second frame 102 can be hinged by the hinge pin 3. When installing the external docking device and the pipeline, after opening the locking assembly 8, the opening and closing cylinder 2 is controlled to retract to open the first frame 101 and the second frame 102, and then the external docking device is sleeved on the two end pipes to be docked, and the opening and closing cylinder 2 is controlled to extend to close the external docking device, and locked by the locking assembly 8, so that the first frame 101 and the second frame 102 are closed into a complete circle structure to complete the installation of the external docking device and the pipeline.

[0056] In the external aligner of the embodiment of the present invention, the first fixed plate 10 and the second fixed plate 11 are circular ring structures, which specifically include two semi-circular ring structures respectively, and the first fixed plate 10 and the second fixed plate 11 can be fixed to the first frame 101 and the second frame 102 by screws and cylindrical pins.

[0057] Among them, the cylinder rod of the pressure plate cylinder 42 can be connected to the first fixed plate 10 or the second fixed plate 11 through a round nut 45; and the pressure plate assembly 4 also includes a plurality of guide shafts 41, one end of the guide shaft 41 is fixedly connected to the first fixed plate 10 or the second fixed plate 11, and a plurality of guide sleeves 46 adapted to the guide shaft 41 are arranged on the pressure plate. When the pressure plate cylinder 42 retracts and extends to drive the pressure plate 43 to move axially, it is guided by the cooperation between the guide shaft 41 and the guide sleeve 46.

[0058] It should be noted that the number of the pressure plate assemblies 4 and the number of wedges 44 included in each pressure plate assembly 4 in the embodiment of the present invention are not specifically limited in the embodiment of the present invention. Figure 1 As shown, six pressure plate assemblies 4 may be arranged along the side wall of the mouthpiece of this embodiment, and each pressure plate assembly 4 may include four wedge blocks 44 (refer to Figure 3 As shown), the number of wedge blocks 44 is set corresponding to the number of pressure rod assemblies 5, that is, each pressure rod assembly 5 has a wedge block 44 adapted thereto for squeezing the pressure rod assembly 5, thereby clamping the pressure rod assembly 5 and the pipeline.

[0059] Optional, see Figure 4 As shown, the pressure rod assembly 5 of this embodiment includes: a pressure wheel 53, a pressure wheel seat 54, an expansion rod 52, and a pressure block 51;

[0060] The pressure wheel 53 is disposed in the pressure wheel seat 54 and abuts against the wedge block 44. The pressure wheel seat 54 is connected to the expansion rod 52, and a spring (not shown in the figure) is sleeved on the expansion rod 52.

[0061] When the pressure plate cylinder 42 is in the retracted state, the wedge block 44 squeezes the pressure wheel 53 to drive the pressure wheel seat 54, the expansion rod 52 and the pressure block 51 to move radially along the outer pipe connector and compress the spring; when the pressure plate cylinder 42 is in the extended state, the pressure wheel seat 54, the expansion rod 52 and the pressure block 51 are reset under the restoring force of the spring.

[0062] The external jointer of the embodiment of the present invention adjusts the misalignment of the pipes at both ends by radial movement of the pressure rod assembly 5, and can adapt to the jointing operations of pipes with different diameters by replacing the pressure rod assemblies 5 of different lengths. For example, for an external jointer suitable for a pipe with a diameter of 1219 mm, it can be made suitable for an external jointer with a diameter of 1016 mm by replacing the pressure rod assembly 5 with a longer length; that is, the external jointer of the pipe can be adapted to pipes with different diameters by replacing the pressure rod assembly 5 without changing the overall structure, and its application range is wider.

[0063] Optionally, the wedge block 44 includes: a plurality of slopes connected in sequence and having different slopes, wherein the slopes abut against the pressure wheel 53; and the slopes of the slopes gradually decrease from away from the end surface of the pressure plate to close to the end surface of the pressure plate.

[0064] The slope of the inclined surface is the ratio of the height difference between the starting and ending points of the inclined surface and the horizontal distance thereof. That is, in the process of the compression of the pressure plate oil cylinder 42 to drive the wedge block 44 to abut against the pressure wheel 53 of the pressure rod assembly 5 to adjust the pipe, the inclined surface of the wedge block 44 with a larger slope first abuts against the pressure wheel 53 of the pressure rod assembly 5 to achieve a large displacement of the pressure rod assembly 5 in the initial pipe matching stage, and as the pressure plate oil cylinder 42 continues to shrink, the inclined surface of the wedge block 44 with a smaller slope gradually abuts against the pressure wheel 53 to achieve a large tension between the pressure rod assembly 5 and the pipe at the end of the pipe matching stage.

[0065] Among them, the embodiment of the present invention does not specifically limit the specific structure of the wedge block 44. For example, the wedge block 44 may include: a first inclined surface with a slope of 30° and a second inclined surface with a slope of 15°. When the pipeline is tightened, the first inclined surface abuts against the pressure wheel 53 of the pressure rod assembly 5. As the pressure plate moves, the second inclined surface abuts against the pressure wheel 53 of the pressure rod assembly 5.

[0066] Furthermore, the axial distance between the pressure block 51 of the pressure rod assembly 5 arranged on the first fixed plate 10 and the pressure block 51 of the pressure rod assembly 5 arranged on the second fixed plate is less than 240 mm; to prevent the pressure rod assembly from moving radially to squeeze the pipeline and adjusting its misalignment, so as to prevent the extrusion force of the pressure rod assembly from acting on the anti-corrosion layer and causing damage to the anti-corrosion layer of the pipeline.

[0067] Optionally, the external pipe joint device of the embodiment of the present invention may further include: a plurality of support wheels 6;

[0068] The supporting wheel 6 is arranged on the pressure plate, and is used to support the pipe outer joint device and to enable the pipe outer joint device to move axially.

[0069] Specifically, the support wheels 6 are arranged along the circumferential direction of the outer pipe joint. When the outer pipe joint of the present embodiment is installed with the pipe, the inner diameter of the circumferentially distributed support wheels 6 is slightly smaller than the outer diameter of the pipe anti-corrosion layer after the frame body 1 is closed. The clamping force of the support wheels 6 on the pipe can be maintained by the clamping of the locking assembly 8. In addition, when each support wheel 6 is clamped with the pipe, the support wheels 6 can play a supporting role on the outer joint. That is, when the outer joint is installed, the support wheels 6 are in contact with the pipe to achieve the outer joint and the pipe are basically concentric, so as to facilitate the subsequent adjustment of the misalignment of the pipe. Preferably, the support wheels 6 are evenly arranged along the circumferential direction of the outer pipe joint. Optionally, the support wheels 6 are rubber wheels to prevent the anti-corrosion layer of the pipe from being damaged when the support wheels 6 are clamped with the pipe.

[0070] In an optional embodiment, the support wheel 6 may be an electromagnetic brake wheel; by setting the support wheel 6 as an electromagnetic brake wheel, the entire external joint device can be axially displaced on the pipeline through the pressure plate cylinder 42 without adding an additional driving device. Figure 1 As shown, when the external pipe joint device needs to move from the second fixed plate 11 to the first fixed plate 10, the support wheel 6 (hereinafter referred to as the first support wheel) on the first fixed plate 10 can be powered off to maintain a free rotation state, and the support wheel 6 (hereinafter referred to as the second support wheel) on the second fixed plate 11 can be powered on and in a braking state. At this time, the pressure plate fixed by the second support wheel can push the entire external joint device toward the first fixed plate 10 through the extension of the pressure plate oil cylinder 42; after the extension of the pressure plate oil cylinder 42, the second support wheel is powered off to maintain a free rotation state, and the first support wheel is powered on and in a braking state. At this time, the pressure plate fixed by the first support wheel can pull the entire external joint device toward the first fixed plate 10 through the contraction of the pressure plate oil cylinder 42 to complete the axial movement of the external pipe joint device on the pipe. In this process, the friction force of the support wheel in the braking state is provided by the anti-corrosion layer of the pipe.

[0071] Furthermore, the pressure plate assembly 4 may also include a displacement sensor (not shown in the figure); the displacement sensor is arranged on the pressure plate cylinder 42, and is used to detect the real-time displacement of the pressure plate cylinder 42; relevant technical personnel can independently drive the pressure plate cylinder 42 on a certain pressure plate according to the detected real-time displacement of the pressure plate cylinder 42 to achieve precise adjustment of the pipeline error.

[0072] Optionally, the guide rail 12 of the embodiment of the present invention includes two semicircular V-shaped guide rails, which can be fixed to the end face of the second fixed plate 11 through a connecting piece, and the welding device 7 is installed on the V-shaped guide rail to move along the V-shaped guide rail to achieve full-position welding after the two end pipes are connected, wherein the welding device 7 is an automatic welding device adapted to the V-shaped guide rail.

[0073] In an alternative embodiment, referring to Figure 5 As shown, the pipe outer joint device of the embodiment of the present invention further includes: a welding device 7;

[0074] The welding device 7 comprises: a slide 72, a driving gear 73 and a plurality of V-shaped gears 74 arranged on the side wall of the slide 72, and a welding wire reel 71, a wire feeding mechanism 79, an adjusting mechanism and a welding torch 75 arranged on the slide;

[0075] The adjustment mechanism is used to adjust the position of the welding torch and the welding wire delivered by the wire feeding mechanism 79 so that the welding torch 75 and the welding wire reach a preset welding position;

[0076] The slide is clamped on the V-shaped guide rail through a V-shaped gear 74, and when the driving gear is in working state, the welding device 7 moves along the guide rail through the engagement of the driving gear 73 with the gear ring (not shown in the figure) of the V-shaped guide rail, wherein the driving gear 74 can be driven by a driving motor (not shown in the figure) arranged on the slide 71.

[0077] Among them, the welding device 7 of the embodiment of the present invention can be designed as a narrow gap structure to meet the distance requirement between the pressure plates, that is, the welding wire reel 71 and the wire feeding mechanism 72 can be vertically installed on the slide 72 to reduce the overall width of the welding device 7. And when welding, the welding wire of the welding wire reel 71 passes through the wire guide tube through the wire feeding device 79 to reach the position matched with the welding torch 75 to achieve welding. In order to meet the demand for the amount of welding wire for the entire welding port of the large-diameter pipeline, a welding wire reel 71 with a large amount of welding wire can be used, such as a 5kg welding wire reel. The specific selection of the welding wire reel 71 can be selected according to the diameter of the pipeline to be welded.

[0078] Furthermore, the adjustment mechanism of the welding device 7 may include: a cross slide 78 and an angular swing device 77 arranged on the slide 72 and connected to the welding torch 75, and a clamp 76 connected to the wire guide tube of the welding device 7. The welding device 7 can complete the up, down, left and right displacement of the welding torch 75 through the cross slide 78, and the welding torch 75 can be swung through the angular swing device 77; the wire guide tube of the welding device 7 can be adjusted in angle through the clamp 76 so that the relative position of the wire guide tube and the tungsten electrode of the welding torch 75 is reasonable.

[0079] Among them, when the pipe outer joint device of the embodiment of the present invention is used for pipe welding, the upward welding method is preferably used to ensure the welding quality; and the welding device 7 installed on the guide rail of the pipe outer joint device can be one or two, etc., and the embodiment of the present invention does not specifically limit this. When the welding device 7 is set as one, after the welding device welds half of the pipe, such as welding from the 6 o'clock direction of the pipe to the 12 o'clock direction, it returns to the 6 o'clock direction of the pipe, and the welding of the other half of the pipe is carried out from here; when the welding device is set as two, one of the devices starts upward welding from the 6 o'clock direction of the welding starting position, and when the welding exceeds the preset arc, the other welding device is driven to the welding starting position and starts upward welding along the other half of the arc direction; wherein, the preset arc can be, for example, a 1 / 6 arc.

[0080] The welding device 7 may also include a weld tracking component 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 a preset welding position to ensure that the welding torch of the welding device 7 is always located at the correct welding position.

[0081] Optionally, a through hole (not shown in the figure) may be provided on the frame body 1 of the pipe external joint device of this embodiment, which is used for observing the pipe and polishing the joints after pipe welding. Specifically, the through hole is provided near the middle position of the outer wall of the frame body 1, wherein the embodiment of the present invention does not specifically limit the size, shape, specific position, etc. of the through hole, as long as it can realize the observation of the pipe and the polishing of the joints after pipe welding.

[0082] With respect to the pipe outer joint device provided in the embodiment of the present invention, taking the Φ1219mm pipe joint construction as an example, the process of using it to perform pipe joint construction can be as follows: wherein, the pipe outer joint device includes two welding devices;

[0083] First, use a crane or a pipe hoist to make the two ends of the pipe to be matched roughly in the same plane, use the crane to lift the matching device to the matching position of the pipe, open the pin shaft of the locking assembly 8 of the matching device, use the opening and closing cylinder 2 to retract the cylinder to open the matching device, use the crane to lift the external matching device to fall and place it at a specific position at the matching of the two end pipes. After the matching device falls to the specific position, control the opening and closing cylinder 2 to extend the cylinder to close the matching device, and lock the matching device through the locking assembly 8 to complete the positioning of the matching device.

[0084] After the external jointer is installed on the two ends of the pipes to be joined, the external jointer is moved along the axial direction of the pipe through the support wheels 6 arranged on both sides of the external jointer according to the relationship between the external jointer and the position to be welded, so that the external jointer is in a preset initial position; after the external jointer reaches the initial position, the pressure plate cylinder 42 is controlled to shrink synchronously, driving the wedge block 44 of the pressure plate assembly 4 to press the circumferentially distributed pressure rod assembly 5 to adjust the misalignment of the pipes at both ends.

[0085] After the platen cylinder 42 is synchronously retracted, the displacement of each platen cylinder 42 is read. After reading the data of each platen cylinder 42, the data are added and averaged to obtain the reference value of the platen cylinder displacement. When the platen cylinder reaches this reference value, the pipes on both sides are concentric. The displacement of each platen cylinder is compared with the reference value. If it is smaller than the reference value, the corresponding platen cylinder is adjusted to extend to the reference value. If it is larger than the reference value, the corresponding platen cylinder is adjusted to retract to the reference value. Until the extension distance of each platen cylinder is the same, the misalignment of the two ends of the pipes is controlled within the requirements of the automatic welding misalignment, such as the misalignment of the two ends of the pipes to be matched is controlled within 1.5mm.

[0086] After the pipe joints meet the requirements of automatic welding misalignment, start the welding device and move it along the guide rail to the initial welding position, and adjust the welding torch position and the relative position of the wire guide tube and the tungsten electrode of the welding torch 75 through the adjustment component to complete the welding positioning of the welding device. Similarly, complete the welding positioning of another welding device. After the positioning is completed, start preheating the pipeline. After the preheating is completed, make one of the devices reach the 6 o'clock position of the welding starting position and start upward welding. When the welding exceeds 1 / 6 of the arc, the other welding device is driven here and starts the upward welding in the other direction. When the first welding device reaches the 12 o'clock position, the arc is extinguished and rotates in the opposite direction. At this time, the second welding device continues to weld until it reaches the 12 o'clock position to complete the welding of the entire circle of welds.

[0087] For pipes of other diameters, such as pipes with a diameter of Φ1016 mm, the process of performing butt welding construction using the external butt welding device of the embodiment of the present invention is the same as above, and only the pressure rod assembly 5 of the corresponding diameter needs to be replaced.

[0088] The pipe external jointer provided in the embodiment of the present invention is provided with a pressure plate assembly and a pressure rod assembly capable of adjusting the misalignment amount of the pipe, and is provided with a guide rail capable of carrying a welding device, so as to complete the adjustment of the misalignment amount of the pipe and the full-automatic welding of the pipe from "root to surface", that is, the full-automatic welding from root welding, filling welding to cover welding. Compared with the existing pipe external jointer, it has great technical advantages in reducing construction stations and reducing operation difficulty; and the pipe external jointer can realize accurate jointing of pipes and efficient automatic welding, thereby improving the efficiency of pipe joint welding assembly.

[0089] Based on the same inventive concept, an embodiment of the present invention further provides a method for using the above-mentioned pipe outer butt joint device capable of carrying a welding device, comprising:

[0090] The external jointing device is installed and locked on the two ends of the pipes to be joined, and the pressure plate cylinder is controlled to extend or retract, so as to drive the wedge block to move along the axial direction of the pipe to be joined and drive the pressure rod assembly to move along the radial direction of the pipe to adjust the misalignment of the two ends of the pipes to be joined, so that the two ends of the pipes meet the automatic welding joint accuracy requirements;

[0091] The welding device installed on the guide rail is started to move along the guide rail to weld the pipes at both ends that meet the automatic welding precision requirements.

[0092] Regarding the method of using the external pipe joint device in the above embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment of the external pipe joint device, and will not be elaborated here.

[0093] 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.

[0094] 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.

[0095] 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 external butt joint device capable of carrying a welding device, characterized in that: include: An openable frame body, a first fixed plate and a second fixed plate arranged in the frame body, and a guide rail arranged on an end surface of the second fixed plate, wherein the end surface of the second fixed plate is an end surface close to the first fixed plate; On the inner walls of the first fixed plate and the second fixed plate, a plurality of pressure rod assemblies are slidably arranged along the circumferential direction, and on the side walls of the first fixed plate and the second fixed plate, a plurality of pressure plate assemblies are arranged; The pressure plate assembly includes a pressure plate, a plurality of wedges arranged on the pressure plate, and a pressure plate cylinder arranged on the pressure plate and connected to the first fixed plate or the second fixed plate at one end; The wedge block is in contact with the pressure rod assembly, and the pressure rod assembly can be respectively sleeved with the pipes to be matched. The pressure plate oil cylinder is extended and retracted, driving the wedge block to move axially along the pipe outer matcher and driving the pressure rod assembly to move radially along the pipe outer matcher, so as to adjust the misalignment of the pipes to be matched; The guide rail is used to carry a welding device to weld the pipe after misalignment adjustment.

2. The pipe outer joint device according to claim 1, characterized in that: The pressure rod assembly comprises: a pressure wheel, a pressure wheel seat, an expansion rod, and a pressure block; The pressure wheel is arranged in the pressure wheel seat and abuts against the wedge block, the pressure wheel seat is connected to the expansion rod, and a spring is sleeved on the expansion rod; When the pressure plate cylinder is in the retracted state, the wedge block squeezes the pressure wheel to drive the pressure wheel seat, the expansion rod and the pressure block to move radially along the pipe outer connector and compress the spring; when the pressure plate cylinder is in the extended state, the pressure wheel seat, the expansion rod and the pressure block are reset under the restoring force of the spring.

3. The pipe outer joint device according to claim 2, characterized in that: The wedge block includes: a plurality of slopes connected in sequence and having different slopes, wherein the slopes abut against the pressure wheel, and the slopes of the slopes gradually decrease from away from the end surface of the pressure plate to close to the end surface of the pressure plate.

4. The pipe outer joint device according to claim 2, characterized in that: An axial distance between a pressing block of the pressing rod assembly arranged on the first fixed plate and a pressing block of the pressing rod assembly arranged on the second fixed plate is less than 240 mm.

5. The pipe outer joint device according to claim 1, characterized in that: Also includes: Multiple support wheels; The supporting wheel is arranged on the pressure plate, and is used for supporting the pipeline outer joint device and for making the pipeline outer joint device move axially.

6. The external pipe joint device according to claim 5, characterized in that: The supporting wheel is an electromagnetic brake wheel.

7. The pipe outer joint device according to claim 1, characterized in that: The pressure plate assembly also includes a displacement sensor; the displacement sensor is arranged on the pressure plate cylinder and is used to detect the real-time displacement of the pressure plate cylinder.

8. The pipe outer joint device according to claim 1, characterized in that: The frame body comprises: a first frame and a second frame in a semicircular shape; The first frame and the second frame are hinged, and an opening and closing cylinder and a locking assembly are arranged between the two to realize the opening, closing and locking of the first frame and the second frame.

9. The pipe outer joint device according to claim 1, characterized in that: The guide rail comprises two semicircular V-shaped guide rails.

10. The external pipe joint device according to claim 9, characterized in that: Also includes: Welding equipment; The welding device comprises: a slide, a driving gear and a plurality of V-shaped gears arranged on the side wall of the slide, and a welding wire reel, a wire feeding mechanism, an adjusting mechanism and a welding torch arranged on the slide; The adjusting mechanism is used to adjust the position of the welding torch and the welding wire transmitted by the wire feeding mechanism so that the welding torch and the welding wire reach a preset welding position; The slide seat is clamped on the V-shaped guide rail through a V-shaped gear, and when the driving gear is in a working state, the driving gear is meshed with the gear ring of the V-shaped guide rail to enable the welding device to move along the guide rail.

11. The external pipe joint according to any one of claims 1 to 10, characterized in that: The frame body is provided with through holes for observing the pipeline and polishing the joints of the pipeline after welding.

12. A method for using the pipe outer butt joint device capable of carrying a welding device as claimed in any one of claims 1 to 11, characterized in that: include: The external jointing device is installed and locked on the two ends of the pipes to be joined, and the pressure plate cylinder is controlled to extend or retract, so as to drive the wedge block to move along the axial direction of the pipe to be joined and drive the pressure rod assembly to move along the radial direction of the pipe to adjust the misalignment of the two ends of the pipes to be joined, so that the two ends of the pipes meet the automatic welding joint accuracy requirements; The welding device installed on the guide rail is started to move along the guide rail to weld the pipes at both ends that meet the automatic welding precision requirements.

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