CN114986035A

CN114986035A - Pipeline clamping device and pipeline welding system

Info

Publication number: CN114986035A
Application number: CN202210762941.3A
Authority: CN
Inventors: 王树昂; 曾惠瑞; 陈月峰; 邱元华; 赵飞; 吕江毅; 陈金强
Original assignee: China Nuclear Industry Fifth Construction Co Ltd
Current assignee: China Nuclear Industry Fifth Construction Co Ltd
Priority date: 2022-06-30
Filing date: 2022-06-30
Publication date: 2022-09-02

Abstract

A pipe clamp for a pipe welding system, comprising: the pipe to be welded can be clamped in the clamping assembly, the first supporting assembly is provided with an opening, and the opening allows the pipe to be welded clamped in the clamping assembly to pass through the shifting mechanism; the tail jacking mechanism comprises a tail jacking assembly, and the tail jacking assembly is used for realizing the jacking of the end part of the pipeline to be welded; the tail top assembly provides an air inlet flow channel, when the tail top assembly is tightly pressed against the end part of the pipeline to be welded, the air inlet flow channel is communicated with the interior of the pipeline to be welded, so that protective gas can enter the interior of the pipeline to be welded from the air inlet flow channel for inflation, and a pipeline welding system is provided in an auxiliary mode.

Description

Pipeline clamping device and pipeline welding system

Technical Field

The invention relates to the technical field of pipeline welding, in particular to a pipeline clamping device and a pipeline welding system.

Background

At present, in the industries of nuclear power, thermal power and the like in China, when small pipelines such as instrument pipes and the like are welded, because two butted pipelines have more specifications, the small-diameter pipelines are mainly welded by using a manual method at present, and the welding effect depends on the operation level of a welder. To reduce this requirement, many automated welding devices have also appeared on the market. But most solutions for inflating the interior of welded pipes are designed to inflate from the back of the indexing mechanism. This type of inflation scheme cannot meet the requirement that the pipeline needs to pass through the shifting mechanism completely because the pipeline is too long during welding.

Disclosure of Invention

One object of the present invention is to provide a pipe clamping device that allows a pipe to be welded to pass through a displacement mechanism to meet the welding requirements of long pipes.

The above-mentioned pipe clamping device is used for pipeline welding system, includes: the positioning mechanism comprises a first supporting component and a clamping component, the clamping component is arranged on the first supporting component, a pipeline to be welded can be clamped in the clamping component, the first supporting component is provided with an opening, and the opening allows the pipeline to be welded clamped in the clamping component to pass through the positioning mechanism; the tail jacking mechanism comprises a tail jacking assembly, and the tail jacking assembly is used for realizing the tight jacking of the end part of the pipeline to be welded; the tail top assembly provides an air inlet flow channel, and when the tail top assembly is tightly pressed against the end part of the pipeline to be welded, the air inlet flow channel is communicated with the interior of the pipeline to be welded, so that protective gas can enter the interior of the pipeline to be welded from the air inlet flow channel for inflation.

In one or more embodiments, the clamping assembly includes a driving assembly and a clamping member, the clamping member is used for clamping the pipe to be welded, and the driving assembly can drive the clamping member to rotate around the axis of the pipe to be welded; the tail ejection mechanism further comprises a second supporting assembly, and the tail ejection assembly is rotatably arranged on the second supporting assembly and can rotate around the axis of the pipeline to be welded; in the welding process, the driving assembly drives the clamping piece to drive the pipeline to be welded to rotate and drives the tail jacking assembly to rotate together.

In one or more embodiments, the second support assembly includes an adapter assembly, the tail cap assembly being rotatably coupled to the adapter assembly; the adapter assembly provides an airflow channel, and two ends of the airflow channel are respectively communicated with the air inlet channel and the air supply device, so that protective gas can sequentially enter the airflow channel and the air inlet channel from the air supply device to inflate the interior of the pipeline to be welded.

In one or more embodiments, the clamping member is a three-jaw chuck to clamp the pipe to be welded; the driving assembly comprises a driving motor and a control unit, the driving motor is in transmission connection with the three-jaw chuck, and the control unit controls the rotating speed of the driving motor to be adjustable.

In one or more embodiments, the first support assembly includes a pitch angle adjusting mechanism, the pitch angle adjusting mechanism includes an adjusting wheel and a roll-over adjusting mechanism, an output shaft is disposed on the roll-over adjusting mechanism, and the clamping assembly is connected with the first support assembly through the output shaft; the adjusting wheel is in transmission connection with the turnover adjusting mechanism, and the output shaft can be driven to rotate by rotating the adjusting wheel, so that the clamping assembly is driven to rotate, and the pitching angle of the pipeline to be welded is adjusted.

In one or more embodiments, the tail cap assembly comprises a cap assembly and a bearing assembly, so that the cap assembly can rotate around the axis of the pipeline to be welded; the jacking assembly comprises a tail jacking block and a rotary middle shaft, the air inlet flow channel comprises a first air inlet flow channel arranged on the tail jacking block and a second air inlet flow channel arranged on the rotary middle shaft, and the first air inlet flow channel is communicated with the second air inlet flow channel; the inner ring of the bearing assembly is connected with the rotary middle shaft, the outer ring of the bearing assembly is fixed on the bearing cylinder and is connected with the second support assembly, so that the tail ejector block and the rotary middle shaft can rotate around the axis of the pipeline to be welded; the tail ejector block is conical and is sleeved at one end, close to the pipeline to be welded, of the rotating center shaft, so that the tail ejector block can extend into the pipeline to be welded for inflation, and the pipeline to be welded drives the tail ejector block to rotate.

In one or more embodiments, the tightening assembly further includes a spring, the tail top block is provided with a first end surface, the rotation center shaft is provided with a second end surface, one end of the spring contacts with the first end surface, and the other end of the spring contacts with the second end surface, so that the tail top block is elastically supported on the rotation center shaft.

In one or more embodiments, an annular table is arranged on the tail ejector block, and the annular table is sleeved on the rotating middle shaft; the jacking assembly further comprises a limiting mechanism, the limiting mechanism comprises a limiting pin, a through hole formed in the annular table and a sliding groove formed in the outer peripheral surface of the rotary middle shaft along the axis direction, the limiting pin penetrates through the through hole to be in contact with the sliding groove and can move in the sliding groove so as to limit the tail jacking block in the axis direction.

In one or more embodiments, the tail ejector block is sleeved at one end of the rotation center shaft, a plurality of grooves are axially formed in a first end surface of the tail ejector block, a plurality of corresponding pin shafts are arranged on the rotation center shaft, and the pin shafts can be respectively matched with the grooves.

In one or more embodiments, the first intake runner and the second intake runner are respectively opened on the tail ejector block and the rotation middle shaft along the axial direction of the welding pipe; the pipeline clamping device further comprises a concentricity adjusting mechanism, the concentricity adjusting mechanism comprises a calibrating piece and a laser device, the calibrating piece is clamped on the clamping piece and concentrically arranged with the welding pipeline, and the laser device is arranged on the second supporting assembly, so that laser can penetrate through the first air inlet flow channel and the second air inlet flow channel, and the position of the tail ejection assembly is calibrated.

When adopting above-mentioned pipe clamping device to weld long pipeline, treat that the one end of welded pipe can pass the displacement mechanism back from the opening on the first supporting component, carry out the centre gripping to the shaft of pipe by the centre gripping subassembly, the other end is by tail top subassembly top tight, and aerify the pipeline inside, this pipe clamping device will be located originally the inside air feeder of displacement mechanism and move to the device outside, be linked together with tail top subassembly, make the protective gas can get into from the inlet channel and treat welded pipe, avoid leading to the great problem of pipeline welding system volume because of the unable displacement mechanism that passes of wherein one end of pipeline when pipeline welding, pipeline welding system's overall structure can be compacter.

Another object of the present invention is to provide a pipe welding system that allows pipes to be welded to pass through the indexing mechanism to meet the welding requirements of long pipes.

The pipeline welding system comprises a pipeline to be welded, a pipeline welding device and the pipeline clamping device, the pipeline to be welded is clamped and fixed through the pipeline clamping device, and the pipeline welding device is used for welding.

The pipeline clamping device adopted by the pipeline welding system moves the gas supply device originally located inside the displacement mechanism to the outside of the device and is communicated with the tail top assembly, so that the shielding gas can enter a pipeline to be welded from the gas inlet channel, the problem that the pipeline welding system is large in size due to the fact that one end of the pipeline cannot penetrate through the displacement mechanism during pipeline welding is avoided, and the overall structure of the pipeline welding system can be more compact.

Drawings

The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and examples, in which:

FIG. 1 is a perspective view of a pipe clamp according to one embodiment.

FIG. 2 is a perspective view of an indexing mechanism according to one embodiment.

Fig. 3 is a perspective view of a tail cap mechanism according to an embodiment.

FIG. 4 is a cross-sectional view of an indexing mechanism according to one embodiment.

FIG. 5 is a side view of a clamping assembly according to an embodiment.

FIG. 6 is a top view of a clamping assembly according to an embodiment.

FIG. 7 is a perspective view of a first support assembly according to an embodiment.

FIG. 8 is a cross-sectional view of a first support assembly according to an embodiment.

FIG. 9 is a schematic diagram of a deflection mechanism adjusting the pitch angle of a pipe to be welded according to one embodiment.

FIG. 10 is a cross-sectional view of a tail cap mechanism according to an embodiment.

FIG. 11 is a perspective view of a pipe clamp device being laser calibrated according to one embodiment.

FIG. 12 is an enlarged partial view of a tail cap mechanism according to an embodiment.

FIG. 13 is a schematic view of a seal assembly according to an embodiment.

FIG. 14 is a schematic view of a spacing mechanism according to an embodiment.

Detailed Description

The present invention is further described in the following description with reference to specific embodiments and the accompanying drawings, wherein the details are set forth in order to provide a thorough understanding of the present invention, but it is apparent that the present invention can be embodied in many other forms different from those described herein, and it will be readily appreciated by those skilled in the art that the present invention can be implemented in many different forms without departing from the spirit and scope of the invention. It is noted that these and other figures which follow are merely exemplary and not drawn to scale and should not be considered as limiting the scope of the invention as it is actually claimed.

In order to realize inflation in a welding pipeline, most of the existing automatic welding equipment adopts a design of inflating from the back of a displacement mechanism. In the welding process, one end of the pipeline to be welded is clamped through the clamping assembly at the front end of the position changing mechanism, and shielding gas can enter the pipeline from the end part of the pipeline through the gas supply device at the rear end of the position changing mechanism, so that the inflation function is realized. The inflation method cannot be realized under the condition that the pipeline to be welded is too long, so that the pipeline needs to pass through the displacement mechanism, or the whole welding device occupies a large space. Accordingly, there is a need to provide a welding system for welding long pipes.

The pipeline welding system comprises a pipeline to be welded, a pipeline welding device and a pipeline clamping device, the pipeline to be welded is clamped and fixed through the pipeline clamping device, and the pipeline is welded through the pipeline welding device. The pipe welding system also comprises a gas supply device for providing shielding gas required by welding.

A pipe clamping device as shown in fig. 1 to 4, which is used for a pipe welding system, and includes an indexing mechanism 1 and a tail-pushing mechanism 2, the indexing mechanism 1 is structured as shown in fig. 2, and includes a first supporting component 3 and a clamping component 4, the clamping component 4 is disposed on the first supporting component 3, a pipe 5 to be welded can be clamped in the clamping component 4, the first supporting component 3 has an opening 31, and the opening 31 allows the pipe 5 to be welded, which is clamped in the clamping component 4, to pass through the indexing mechanism 1. The tail cap mechanism 2 is structured as shown in fig. 3, and comprises a tail cap assembly 6, wherein the tail cap assembly 6 is used for tightly pressing the end part of the pipeline 5 to be welded. The tail top assembly 6 provides an air inlet flow channel, and when the tail top assembly 6 is tightly pressed against the end part of the pipeline 5 to be welded, the air inlet flow channel is communicated with the interior of the pipeline 5 to be welded, so that protective gas can enter the interior of the pipeline 5 to be welded from the air inlet flow channel for inflation.

When adopting above-mentioned pipe clamping device to weld long pipeline, treat that the one end of welded pipe 5 can pass displacement mechanism 1 back from opening 31 on the first supporting component 3 with the mode that fig. 4 shows, carry out the centre gripping by centre gripping subassembly 4 to the body of pipe, the other end is by tail top subassembly 6 top tightly, and aerify the pipeline inside, this pipe clamping device will be located originally that the air feeder of displacement mechanism 1 inside moves to the device outside, be linked together with tail top subassembly 6, make protective gas can get into from the inlet channel and treat welded pipe 5, avoid leading to the great problem of pipeline welding system volume because of the unable displacement mechanism 1 of passing of one of them end of pipeline when the pipe welding, pipeline welding system's overall structure can be compacter.

In one embodiment shown in fig. 1, in order to realize that the pipeline can rotate in the welding process so as to weld in the circumferential direction of the pipeline, the clamping assembly 4 includes a driving assembly 41 and a clamping member 42, the clamping member 42 is used for clamping the pipeline 5 to be welded, the driving assembly 41 can drive the clamping member 42 to rotate around the axis of the pipeline 5 to be welded, the tail ejection mechanism 2 further includes a second supporting assembly 7, the tail ejection assembly 6 is rotatably arranged on the second supporting assembly 7, so that the tail ejection assembly 6 can rotate around the axis of the pipeline 5 to be welded, during the welding process, the driving assembly 41 drives the clamping member 42 to drive the pipeline 5 to be welded to rotate and drive the tail ejection assembly 6 to rotate together, and the shielding gas can enter the interior of the pipeline 5 to be welded from the gas inlet channel to be inflated. Wherein, the contact surface of tail top subassembly 6 and pipeline has certain roughness to ensure that tail top subassembly 6 can rotate along with the pipeline jointly, this roughness can be provided by the material or the structure of contact surface, for example can set up the convex part on tail top subassembly 6, treat to set up corresponding concave part on the welded pipe 5, the cooperation messenger through this convex part and concave part treats that welded pipe 5 can drive tail top subassembly 6 and rotate jointly, or the part that tail top subassembly 6 and pipeline contacted adopts the material that can provide certain frictional force to wait that welded pipe 5 can drive tail top subassembly 6 and rotate jointly.

The second support assembly 7 includes an adapter assembly 71, the adapter assembly 71 is connected to an external air supply device, the tail roof assembly 6 is rotatably connected to the adapter assembly 71, the adapter assembly 71 provides an air flow channel 761, and two ends of the air flow channel 761 are respectively communicated with the air inlet channel and the air supply device, so that the shielding gas can sequentially enter the air flow channel 761 and the air inlet channel from the air supply device to inflate the interior of the pipeline 5 to be welded.

In this embodiment, the second supporting assembly 7 further includes a position adjusting assembly 73, and the tail cap assembly 6 and the adaptor assembly 71 are fixed to the position adjusting assembly 73 to adjust the position of the tail cap assembly 6 in the horizontal and vertical directions.

The structure of the position adjusting assembly 73 is as shown in fig. 3, the tail roof assembly 6 and the adapter assembly 71 are connected with the position adjusting assembly 73 through a connecting plate 74, and the position adjusting assembly 73 includes a screw assembly 731, a lifting platform 732 and a horizontal position adjusting plate 733, so that the tail roof assembly 6 can move in multiple directions. The position changing mechanism 1 and the tail top mechanism 2 can be positioned through bolts and fixed on the same plane, the tail top assembly 6 is adjusted in the horizontal X direction through the screw rod assembly 731, the tail top assembly 6 is adjusted in the vertical direction through the lifting platform 732, the tail top assembly 6 is adjusted in the horizontal Y direction through the horizontal position adjusting plate 733, the rotating shaft of the tail top mechanism 2 and the rotating shaft of the position changing mechanism 1 are concentric, the two shafts are concentric, the problem that the tail top assembly 6 rotating to be welded with the pipeline 5 is large in shaking amplitude can be effectively prevented from being followed, the abrasion of a contact surface between the tail top assembly 6 and the pipeline is reduced, and the service life is prolonged.

In one embodiment, the clamping member 42 is a three-jaw chuck 42 for clamping the pipe 5 to be welded, and the driving assembly 41 includes a driving motor in transmission connection with the three-jaw chuck 42 and a control unit for controlling the rotation speed of the driving motor, so as to adjust the rotation speed of the three-jaw chuck 42.

Specifically, referring to fig. 5 and 6, the clamping assembly 4 includes a clamping assembly housing 43, a housing adapter flange 44, a cylindrical pin 45, a three-jaw chuck 42, a three-jaw chuck adapter flange 46, a rotary table 47, and a driving motor, the clamping assembly housing 43 has a cover plate 431 and two side wall surfaces 432, the housing adapter flange 44 is disposed on the two side wall surfaces 432 of the housing, the housing adapter flange 44 is provided with a connecting hole, and the first support assembly 3 is provided with a corresponding connecting hole, so that the clamping assembly 4 and the first support assembly 3 can be fixedly connected through the cylindrical pin 45. The three-jaw chuck 42 is disposed on a three-jaw chuck adaptor flange 46 for clamping the pipe. The rotating platform 47 is rotatably arranged on the clamping assembly shell 43, the front end of the rotating platform 47 is rigidly connected with the three-jaw chuck adapter flange 46, the rear end of the rotating platform 47 is connected with the output end of the driving motor, and the rotating speed of the output end of the driving motor is controlled by the control unit, so that the rotating speed of the three-jaw chuck 42 can be adjusted to meet the requirements of different welding speeds.

In one embodiment, the first support assembly 3 includes a pitch angle adjusting mechanism, the pitch angle adjusting mechanism includes an adjusting wheel 32 and a roll-over adjusting mechanism 33, an output shaft 34 is disposed on the roll-over adjusting mechanism 33, and the clamping assembly 4 is connected to the first support assembly 3 through the output shaft 34. Wherein, the regulating wheel 32 is in transmission connection with the turning regulating mechanism 33, and the rotation of the regulating wheel 32 can drive the output shaft 34 to rotate, so as to drive the clamping component 4 to rotate, so as to regulate the pitch angle of the pipeline 5 to be welded.

Specifically, referring to fig. 7 and 8, the first support assembly 3 includes a first support assembly housing 30, an adjusting wheel 32, an adjusting wheel shaft 321, a worm and gear speed reducer 33 (i.e., a turning adjusting mechanism), an output shaft 34, a follower shaft 35, and a bearing 36 with a seat, an opening 31 is provided on a rear side wall surface of the first support assembly housing 30 so that the pipe 5 to be welded can pass through the displacement mechanism 1, the adjusting wheel 32 and the worm and gear speed reducer 33 are provided on a side wall surface of the first support assembly housing 30, the adjusting wheel 32 is rotatably provided on the wall surface, the adjusting wheel 32 is rotated, the worm and gear speed reducer 33 can be driven to rotate by the adjusting wheel shaft 321, and the output shaft 34 of the worm and gear speed reducer 33 drives the clamping assembly 4 to rotate, so as to perform angle adjustment on the pipe 5 to be welded, as shown in fig. 9; the follower shaft 35 is rotatably disposed on the other side wall surface of the first support assembly housing 30 through a bearing 36 with a seat, and is disposed coaxially with the output shaft 34, and the output shaft 34 and the follower shaft 35 are both provided with the aforementioned connecting holes for connecting the clamping assembly 4 and the first support assembly 3. The rotating speed output by the adjusting wheel shaft 321 is adjusted by the overturning adjusting mechanism 33, the rotating speed at the output shaft 34 is reduced, more accurate angle adjustment can be realized on the clamping assembly 4, and the operation and the use are convenient.

In this embodiment, the first support assembly 3 further comprises a pitch angle indicator 37 disposed on the first support assembly housing 30, and the angle between the clamping assembly 4 and the horizontal plane is indicated by a pointer 38 on the pitch angle indicator 37.

The first support member 3 used in the displacement mechanism 1 in the above embodiment can support the clamp member 4 and can adjust the tilt angle of the clamp member 4. Under the general welding condition, the pipe body part of the pipeline 5 to be welded is stably clamped by the three-jaw chuck 42, the rotary central shaft of the three-jaw chuck 42 is kept in a horizontal state and is matched with the tail jacking mechanism 2 to jack the other end of the pipeline tightly, the pipeline 5 to be welded is fixed in the horizontal direction, and protective gas can enter the pipeline from the gas inlet channel; in a special case, for example, when welding socket welding is performed, if the pipe 5 to be welded needs to be kept in an inclined state, the adjustment of the pitch angle of the three-jaw chuck 42 can be realized by rotating the adjusting wheel 32, so that the pipe is fixed in an inclined position.

In one embodiment, the tail cap assembly 6 includes a cap assembly 61 and a bearing assembly 62, such that the cap assembly 61 is rotatable about the axis of the pipe 5 to be welded. The jacking assembly 61 comprises a tail jacking block 63 and a rotary central shaft 64, the inlet channels comprise a first inlet channel 631 arranged on the tail jacking block 63 and a second inlet channel 641 arranged on the rotary central shaft 64, and the first inlet channel 631 is communicated with the second inlet channel 641. The inner ring of the bearing assembly 62 is connected with the rotary middle shaft 64, and the outer ring of the bearing assembly 62 is fixed on the bearing cylinder 65 and connected with the second support assembly 7, so that the tail top block 63 and the rotary middle shaft 64 can rotate around the axis of the pipeline 5 to be welded. The tail ejector block 63 is conical, and is sleeved at one end, close to the pipeline 5 to be welded, of the rotating center shaft 64, so that the tail ejector block 63 can extend into the pipeline 5 to be welded to be inflated, and the pipeline 5 to be welded drives the tail ejector block to rotate.

Referring to fig. 10, the tail block 63 and the rotation central shaft 64 have hollow structures to form a first inlet channel 631 and a second inlet channel 641 inside thereof. The tail ejector block 63 is sleeved at one end of the rotating center shaft 64, a plurality of grooves 632 are formed in the first end face of the tail ejector block 63 along the axial direction, a plurality of corresponding pin shafts 67 are arranged on the rotating center shaft 64, the plurality of pin shafts 67 can be respectively matched with the plurality of grooves 632, the coaxiality of the tail ejector block 63 and the rotating center shaft 64 can be guaranteed through the matching of the pin shafts 67 and the grooves 632, and the situation that the tail ejector block and the rotating center shaft 64 are eccentric in the welding rotating process is prevented. The inner ring of the bearing assembly 62 is sleeved on the rotating middle shaft 64, and the outer ring is fixed on the bearing cylinder 65 and fixedly connected to the second support assembly 7 through the bearing mounting seat 68, so that the pipeline 5 to be welded can drive the tail ejector block 63 and the rotating middle shaft 64 to rotate together during welding.

In this embodiment, the adaptor assembly 71 includes a three-way fixing seat 75 and an adaptor flange 76, the adaptor flange 76 is sleeved on one end of the three-way fixing seat 75 close to the tail cap assembly 6 and is fixedly connected with the bearing cylinder 65, the rotation central shaft 64 is rotatable relative to the adaptor flange 76 and is communicated with the inside of the two, specifically, the adaptor assembly 71 has an air inlet 72 for connecting an external air supply device, an air channel 761 on the adaptor assembly 71 includes an air channel formed inside the adaptor flange 76 and an air channel formed inside a part of the three-way fixing seat 75 cavity, so that the second air inlet channel can be communicated with the air inlet 72, and the shielding gas can enter the three-way fixing seat 75 cavity and the air channel 761 inside the adaptor flange 76 from the air inlet 72 according to the direction shown by the arrow in fig. 10, and then sequentially passes through the second

air inlet channel

641 and 641 on the tail cap assembly 6, First inlet channel 631 realizes treating that the welded pipe 5 is inside aerifys, improves welding quality.

As shown in fig. 10, the tightening assembly 61 further includes a spring 66, a first end surface 630 is disposed on the tail top block 63, a second end surface 640 is disposed on the rotation central shaft 64, one end of the spring 66 contacts with the first end surface 630, the other end contacts with the second end surface 640, the tail top block 63 is elastically supported on the rotation central shaft 64 along the axial direction, so that the tail top block 63 can keep tightening the end of the pipe 5 to be welded, and the compression degree of the spring 66 can be changed according to the tightening force, so as to avoid the leakage of shielding gas during the welding process.

As shown in fig. 14, the tightening component 61 further includes a limiting mechanism 611, the limiting mechanism 611 includes a limiting pin 612, a through hole disposed on the annular table 633, and a sliding groove 613 disposed on the outer peripheral surface of the rotation center shaft 64 along the pipeline axis direction, the limiting pin 612 passes through the through hole to contact the sliding groove 613 and is movable in the sliding groove 613, so as to limit the tail ejector block 63 in the axis direction, to limit the range in which the tail ejector block 63 and the rotation center shaft 64 can move relative to each other, and to ensure that the tail ejector block 63 cannot be ejected from the rotation center shaft 64 by the spring 66.

In one embodiment, the tail cap assembly 6 further includes a seal assembly 10, and the puller assembly 61 and the bearing assembly 62 are sealed by the seal assembly 10. Specifically, referring to fig. 12 and 13, since the rotating central shaft 64 is rotatable relative to the adaptor flange 76 and there is no direct sealing structure therebetween, during the inflation of the shielding gas, most of the shielding gas enters the second gas inlet channel 641 as shown by arrow a in fig. 12, but a small part of the shielding gas enters the bearing cylinder cavity 69 as shown by arrow B, so that the abutting assembly 61 and the bearing assembly 62 need to be sealed to prevent the shielding gas from leaking out from the front end of the bearing cylinder cavity 69 (the front end is the end close to the tail abutting block 63) and causing waste of the shielding gas.

As shown in fig. 13, in this embodiment, the seal assembly 10 includes a seal ring 101 and a seal cover 102, the seal ring 101 is disposed on the seal cover 102, and the seal cover 102 is fixed to the front end of the bearing cylinder 65 by a fastening member. In addition, because the inner sides of the seal ring 101 and the seal gland 102 need to be in contact with the rotating central shaft 64 to ensure the sealing performance, the seal ring 101 and the seal gland 102 can generate sliding friction with the rotating central shaft 64 in the rotating welding process, and lubricating grease can be added at the contact positions of the seal ring 101 and the seal gland 102 and the rotating central shaft 64 to reduce the abrasion and prolong the service life.

In the embodiment shown in fig. 10, the first inlet channel 631 and the second inlet channel 641 are respectively opened on the tail block 63 and the rotation center shaft 64 along the axial direction of the welded pipe. The pipeline clamping device further comprises a concentricity adjusting mechanism, the concentricity adjusting mechanism comprises a calibrating piece 8 and a laser device 9, the calibrating piece 8 is clamped on the clamping piece 42 and is arranged concentrically with the pipeline 5 to be welded, and the laser device 9 is arranged on the second supporting assembly 7, so that laser can penetrate through the first air inlet channel 631 and the second air inlet channel 641 to calibrate the position of the tail top assembly 6.

When the center of rotation of the tail top block 63 is found to be different from the center of rotation of the pipe 5 to be welded, as shown in fig. 11, the calibration piece 8 is clamped on the three-jaw chuck 42, and the adjustment wheel 32 is adjusted so that the center of rotation of the three-jaw chuck 42 is in a horizontal position. The laser device 9 is started, laser penetrates through the cavity of the three-way fixing seat 75 from the rear side, laser is irradiated to the forward calibration piece 8, the position adjusting component 73 (comprising a screw rod component 731, a lifting platform 732 and a horizontal position adjusting plate 733) is operated according to conditions to adjust the tail ejection component 6 in the horizontal direction and the vertical direction, the laser is ensured to be aligned to the target position of the calibration piece 8, the position adjusting component 73 is locked at the calibrated position, and the concentricity calibration of the displacement mechanism 1 and the tail ejection mechanism 2 is completed. The purpose of adjusting the position of the tail ejection assembly 6 in the above mode is to prevent the tail ejection block 63 from being worn too much when rotating along with the pipeline 5 to be welded, and prevent the rotating middle shaft 64 from shaking too much when rotating along with the pipeline, so that the components are damaged, and the service life of the device is prolonged.

Although the present invention has been disclosed in terms of the preferred embodiment, it is not intended to limit the invention, and variations and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention. Therefore, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope defined by the claims of the present invention, unless the technical essence of the present invention departs from the content of the present invention.

Claims

1. A pipe clamp device for use in a pipe welding system, comprising:

the positioning mechanism comprises a first supporting component and a clamping component, the clamping component is arranged on the first supporting component, the pipeline to be welded can be clamped in the clamping component, the first supporting component is provided with an opening, and the opening allows the pipeline to be welded clamped in the clamping component to pass through the positioning mechanism; and

the tail ejection mechanism comprises a tail ejection assembly, and the tail ejection assembly is used for realizing the tight ejection of the end part of the pipeline to be welded;

the tail top assembly provides an air inlet flow channel, and when the tail top assembly is tightly pressed against the end part of the pipeline to be welded, the air inlet flow channel is communicated with the interior of the pipeline to be welded, so that protective gas can enter the interior of the pipeline to be welded from the air inlet flow channel for inflation.

2. The pipe clamping device of claim 1, wherein the clamping assembly includes a driving assembly and a clamping member, the clamping member being configured to clamp the pipe to be welded, the driving assembly being configured to drive the clamping member to rotate about an axis of the pipe to be welded;

the tail ejection mechanism further comprises a second supporting assembly, and the tail ejection assembly is rotatably arranged on the second supporting assembly and can rotate around the axis of the pipeline to be welded;

in the welding process, the driving assembly drives the clamping piece to drive the pipeline to be welded to rotate and drives the tail jacking assembly to rotate together.

3. The pipe gripping apparatus of claim 2, wherein the second support assembly includes an adapter assembly, the tail cap assembly being rotatably coupled to the adapter assembly;

the adapter assembly provides an airflow channel, and two ends of the airflow channel are respectively communicated with the air inlet channel and the air supply device, so that protective gas can sequentially enter the airflow channel and the air inlet channel from the air supply device to inflate the interior of the pipeline to be welded.

4. The pipe clamping device of claim 2 wherein said clamping member is a three-jaw chuck for clamping said pipe to be welded;

the driving assembly comprises a driving motor and a control unit, the driving motor is in transmission connection with the three-jaw chuck, and the control unit controls the rotating speed of the driving motor to be adjustable.

5. The pipe clamping device of claim 1 wherein said first support assembly includes a pitch angle adjustment mechanism, said pitch angle adjustment mechanism including an adjustment wheel and a roll adjustment mechanism, said roll adjustment mechanism having an output shaft, said clamp assembly being coupled to said first support assembly via said output shaft;

the adjusting wheel is in transmission connection with the turnover adjusting mechanism, and the output shaft can be driven to rotate by rotating the adjusting wheel, so that the clamping assembly is driven to rotate, and the pitching angle of the pipeline to be welded is adjusted.

6. The pipe clamping device of claim 2, wherein said tail cap assembly comprises a puller assembly and a bearing assembly, such that said puller assembly is rotatable about an axis of the pipe to be welded;

the jacking assembly comprises a tail jacking block and a rotary middle shaft, the air inlet flow channel comprises a first air inlet flow channel arranged on the tail jacking block and a second air inlet flow channel arranged on the rotary middle shaft, and the first air inlet flow channel is communicated with the second air inlet flow channel;

the inner ring of the bearing assembly is connected with the rotary middle shaft, the outer ring of the bearing assembly is fixed on the bearing cylinder and is connected with the second support assembly, so that the tail ejector block and the rotary middle shaft can rotate around the axis of the pipeline to be welded;

the tail ejector block is conical and is sleeved at one end, close to the pipeline to be welded, of the rotating center shaft, so that the tail ejector block can extend into the pipeline to be welded for inflation, and the pipeline to be welded drives the tail ejector block to rotate.

7. The pipe clamping device according to claim 6, wherein said tightening assembly further comprises a spring, said tail top block has a first end surface, said rotation center shaft has a second end surface, one end of said spring is in contact with said first end surface, and the other end of said spring is in contact with said second end surface, thereby elastically supporting said tail top block on said rotation center shaft.

8. The pipe clamping device of claim 7, wherein said tail top block is provided with an annular table, said annular table being sleeved on said rotating center shaft;

the jacking assembly further comprises a limiting mechanism, the limiting mechanism comprises a limiting pin, a through hole formed in the annular table and a sliding groove formed in the outer peripheral surface of the rotary middle shaft along the axis direction, the limiting pin penetrates through the through hole to be in contact with the sliding groove and can move in the sliding groove so as to limit the tail jacking block in the axis direction.

9. The pipe clamping device according to claim 6, wherein said tail top block is sleeved on one end of said rotating central shaft, a plurality of grooves are axially formed on a first end surface of said tail top block, a plurality of corresponding pins are arranged on said rotating central shaft, and said plurality of pins can be respectively matched with said plurality of grooves.

10. The pipe clamping device according to claim 6, wherein the first inlet flow channel and the second inlet flow channel are respectively opened on the tail top block and the rotation central shaft along the axial direction of the welded pipe;

the pipe clamping device further comprises a concentricity adjusting mechanism, the concentricity adjusting mechanism comprises a calibrating piece and a laser device, the calibrating piece is clamped on the clamping piece and is concentrically arranged with the welding pipe, and the laser device is arranged on the second supporting assembly, so that laser can penetrate through the first air inlet flow channel and the second air inlet flow channel to calibrate the position of the tail top assembly.

11. A pipe welding system comprising a pipe to be welded, a pipe welding device by which the pipe to be welded is held stationary, and the pipe clamping device of any one of claims 1 to 10 with which welding is performed.