Welding Device and Usage Method for Large-Diameter Water Diversion Pipelines

Abstract

The present invention relates to the technical field of pipeline welding, and in particular to a welding device and a usage method for large-diameter water diversion pipelines. The device includes a deviation detection mechanism and a support adjustment mechanism for adjusting the angle and position of a steering pipe. The deviation detection mechanism includes two sets of kits, which are respectively arranged at the docking ends of a fixed pipe and a steering pipe. Each kit includes an inner hoop on the inner side and an outer hoop on the outer side. The inner hoop can be fixed on the pipeline. A chute is arranged on the outer side of the inner hoop. The outer hoop is rotatably arranged on the outer side of the inner hoop. A connecting block is fixedly connected to the top of the outer hoop. A heavy object is suspended on the hanging ring, so that both connecting blocks are at the highest point positions of the pipeline docking ends. During the use of the present invention, the support adjustment mechanism can effectively support and control the steering pipe. The deviation detection mechanism can reflect the deviation at one point, avoid large-scale deviation finding, and can amplify the deviation, facilitating the position adjustment in the early stage of welding.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline welding, and specifically to a welding device and a usage method for large-diameter water diversion pipelines. Background Technique

[0002] As Figure 1 shown, the fixed pipe 1 is a pipeline fixed at the front end. During the process of pipeline turning, it is necessary to weld the turning pipe 2. Before welding, it is necessary to ensure that the fixed pipe 1 is aligned with the turning pipe 2, and to ensure that there is a normal and uniform gap L between the two welding surfaces. When the gap L is uneven, it will seriously affect the welding quality.

[0003] Currently, when docking the above pipelines, there are the following problems. First, the turning pipe 2 is a bent pipe, and due to the irregularity of the bending of the turning pipe 2, it is difficult to effectively support and control the turning pipe 2 during the docking process in the prior art. Second, because the pipeline is a large-diameter water diversion pipeline, the docking surface is relatively wide. When docking large-diameter pipelines, the challenge is the accuracy of docking. Some minor deviations will become difficult to detect in the case of a relatively wide docking surface.

[0004] Therefore, a welding device and a usage method for large-diameter water diversion pipelines are proposed to solve the above problems in the background technique. Summary of the Invention

[0005] The purpose of the present invention is to provide a welding device and a usage method for large-diameter water diversion pipelines. The welding device includes a support adjustment mechanism and a deviation detection mechanism. The support adjustment mechanism can effectively support and control the turning pipe, and the deviation detection mechanism can concentrate the deviation at a point for manifestation, avoid large-scale deviation finding, and can amplify the deviation to facilitate the position adjustment before welding, so as to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A welding device for large-diameter water diversion pipelines includes a deviation detection mechanism and a support adjustment mechanism for adjusting the angle and position of the turning pipe. The deviation detection mechanism includes two sets of kits, which are respectively arranged at the docking ends of the fixed pipe and the turning pipe. Each kit includes an inner hoop on the inner side and an outer hoop on the outer side. The inner hoop can be fixed on the pipeline. A chute is provided on the outer side of the inner hoop. The outer hoop is rotatably arranged on the outer side of the inner hoop. A connecting block is fixedly connected to the top end of the outer hoop, and a suspension ring is fixedly connected to the bottom end of the outer hoop. The central angle between the suspension ring and the connecting block is 180°. A heavy object is suspended on the suspension ring so that both connecting blocks are at the highest point positions of the pipeline docking ends.

[0007] The present invention can also be provided with a screw rod spirally connected inside the outer clamping hoop. After hanging a heavy object on the lifting ring and making the connecting blocks on both sides be at the highest point positions of the pipe docking ends, the relative fixation between the outer clamping hoop and the inner clamping hoop is realized by rotating the screw rod inside the outer clamping hoop.

[0008] A push rod is spirally connected inside the connecting block on the fixed pipe, and a rotating ball is rotatably connected inside the connecting block on the steering pipe. A conical groove is formed on the side of the rotating ball facing the fixed pipe. A laser emitter is fixedly connected inside the right end of the rotating ball. A connecting rod is fixedly connected to the top end of the outer clamping hoop on the steering pipe. The projection of the connecting rod and the laser emitter on the surface of the outer clamping hoop is on a diameter of the outer clamping hoop.

[0009] A white board is fixedly connected to the right end of the connecting rod. A marking point is fixedly connected to the middle position of the white board. A center of gravity area is fixedly connected to the bottom end of the rotating ball. In the initial state, due to the existence of the center of gravity area inside the rotating ball, the connection line between the conical groove and the laser emitter is on the central horizontal axis of the rotating ball, and the laser emitted by the laser emitter can irradiate on the marking point.

[0010] When the docking ends of the fixed pipe and the steering pipe are docked, when and only when the push rod is in complete contact with the center of the inner surface of the conical groove and the laser line emitted by the laser emitter irradiates on the marking point, it indicates that the docking angle and the docking surface are correct. A touch sensor can be arranged at the center of the conical groove to judge whether the push rod is in complete contact with the center of the inner surface of the conical groove; it can also be judged by observation whether the push rod is in complete contact with the center of the inner surface of the conical groove.

[0011] After the connecting blocks on both sides are at the highest point positions of the pipe docking ends, the deviation detection mechanism starts to work. When there is an angular deviation or a position deviation on the docking surface between the two welding ends, rotate the push rod. The push rod moves to the right and touches the conical groove. The push rod will hold against a non-central point of the conical groove. At this time, the rotating ball will deflect. The rotating ball drives the laser emitter to rotate. Taking the center of the rotating ball as the fulcrum, the light emitted by the laser emitter will deviate from the marking point on the white board. Because the white board is far from the fulcrum, the deflection of the rotating ball acting on the laser emitter will increase the deviation value of the position of the light emitted by the laser emitter on the white board from the marking point at the center of the white board, so as to amplify this deviation value, which is convenient for the staff to observe more intuitively. Then, according to the direction of the deviation, adjust through the support adjustment mechanism until the position of the light emitted by the laser emitter on the white board coincides with the marking point, so as to realize the adjustment of the docking angle.

[0012] As a preferred welding device for large-diameter water diversion pipes of the present invention, scale lines are arranged on the push rod, and the calibration of the welding gap L can be realized by observing the scale lines on the push rod and cooperating with the support adjustment mechanism.

[0013] During the use of the present invention, the support adjustment mechanism can effectively support and control the steering tube. The deviation detection mechanism can concentrate the deviation at one point for manifestation, avoiding large-scale deviation finding, and can amplify the deviation, facilitating the position adjustment before welding.

[0014] Preferably, as a welding device for large-diameter water diversion pipelines of the present invention, the right end of the ejector rod coincides with the inner side of the right end of the conical groove. A counterweight area is also provided at the upper left side of the rotating ball to balance the rotating ball to reach its initial state.

[0015] Preferably, as a welding device for large-diameter water diversion pipelines of the present invention, both the outer hoop and the inner hoop include two upper and lower semi-rings. At the joints of the two upper and lower semi-rings of the inner hoop, first connecting pieces are fixedly connected. The first connecting pieces at the upper and lower positions are detachably connected by bolts. At the joints of the two upper and lower semi-rings of the outer hoop, second connecting pieces are fixedly connected. The second connecting pieces at the upper and lower positions are detachably connected by bolts. The second connecting pieces can slide within the first connecting pieces.

[0016] Preferably, as a welding device for large-diameter water diversion pipelines of the present invention, a pressing hydraulic rod is fixedly connected to the inner side of the inner hoop. The inner hoop is fixed to the outside of the pipeline by the extension of the movable end of the pressing hydraulic rod. During use, it is necessary to ensure that the two pressing hydraulic rods expand and contract synchronously.

[0017] Preferably, as a welding device for large-diameter water diversion pipelines of the present invention, the support adjustment mechanism includes a bottom plate. A rotating plate is rotatably connected to the top end of the bottom plate. A movable plate is slidably connected to the top end of the rotating plate. A second hydraulic rod is fixedly connected to the top end of the movable plate. The upper movable end of the second hydraulic rod is detachably connected to a support member by a spiral connection. To facilitate the removal of the support member after pipeline welding, the support member can be set in a multi-segment spiral connection manner to achieve convenient disassembly. The top end of the support member is rotatably connected to a runner by a rotating shaft. The support member can extend into the inner side of the steering tube to first achieve point support. A third hydraulic rod is also rotatably connected to the top end of the movable plate by a hinge. The top end of the third hydraulic rod is rotatably connected to a clamping member. The steering tube is supported and fixed by clamping the bottom edge of the steering tube by the clamping member.

[0018] This fixing method can firmly clamp and fix the steering tube through two points, avoiding the problem of difficult fixing caused by the irregularity of the steering tube in the prior art.

[0019] The support member is obliquely placed to the left to shift the weight of the steering tube to the right, and then clamped and fixed again by the clamping member to increase the stability of the support for the steering tube.

[0020] Preferably, as the welding device for large-diameter water diversion pipelines of the present invention, the clamping member includes an L-shaped plate. The bottom end of the L-shaped plate is rotatably connected to the top end of the third hydraulic rod. A groove is formed inside the L-shaped plate, and a clamping block is slidably connected to the inside of the groove. The bottom edge of the steering pipe is clamped by the clamping block and the inner side of one end of the L-shaped plate. The clamping block and the inner side of one end of the L-shaped plate can be set to be arc-shaped to fit the inner and outer edges of the steering pipe, so as to increase the contact surface with the inner and outer edges of the steering pipe and achieve effective fixation. A screw rod is rotatably connected to the inside of the L-shaped plate. The screw rod is arranged in the groove, and the outer side of the screw rod is helically connected to the inner side of the clamping block. The other end of the screw rod is fixedly connected to a turntable. The position of the clamping block is adjusted by rotating the turntable, and the angle of the steering pipe in the up and down directions is adjusted by the telescopic movement of the third hydraulic rod.

[0021] Preferably, as the welding device for large-diameter water diversion pipelines of the present invention, a leveling member is fixedly connected to the bottom end of the bottom plate, and a motor is fixedly connected to the inner side of the bottom end of the bottom plate. The end of the main shaft of the motor is fixedly connected to the bottom end of the rotating plate. The angle of the steering pipe in the front and back directions is adjusted by the rotation of the motor.

[0022] Under the above settings, the leveling member in the present invention is a prior art, and its structure is a screw lifting mechanism, which is used to level the bottom plate and adjust the height within a certain range, and will not be elaborated here.

[0023] Preferably, as the welding device for large-diameter water diversion pipelines of the present invention, a limiting groove is formed in the inner side of the left end of the rotating plate, and a sliding plate is slidably connected to the inside of the limiting groove. The right end of the sliding plate is fixedly connected to a first electric push rod, and the movable end of the first electric push rod is fixedly connected to the left end of the movable plate. The position of the steering pipe in the left and right directions is adjusted by the first electric push rod. A second electric push rod is fixedly connected to the inner side of the front end of the rotating plate, and the movable end of the second electric push rod is fixedly connected to the front end of the movable plate. The position of the steering pipe in the front and back directions is adjusted by the second electric push rod.

[0024] The usage method of the welding device for large-diameter water diversion pipelines is as follows:

[0025] Step 1: With the help of a lifting facility, place the steering pipe on the support adjustment mechanism. The support member penetrates into the inside of the steering pipe to first achieve point support, and the clamping member clamps the bottom edge of the steering pipe to realize the support and fixation of the steering pipe. The lifting facility can be a temporarily erected simple gantry, and lifting is achieved through a chain hoist.

[0026] Step 2: Install the inner hoop and the outer hoop on the two butt ends of the pipeline respectively. Hang heavy objects on the lifting rings so that both connecting blocks are at the highest point positions of the pipeline butt ends.

[0027] Step 3: Continuously adjust the angle and position of the steering tube through the support adjustment mechanism. When and only when the push rod is completely in contact with the center of the inner surface of the conical groove, and the laser line emitted by the laser transmitter shines on the marked point, it indicates that the docking angle and docking surface are correct;

[0028] Step 4: There are scale lines on the mandrel. By observing the scale lines on the mandrel and cooperating with the support adjustment mechanism, the welding gap L can be calibrated;

[0029] Step 5: After step 3 and step 4 are completed, the pipeline is welded. After welding is completed, the support adjustment mechanism and the deviation detection mechanism are removed.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] 1. The welding device for large-diameter water diversion pipeline, after the connecting blocks on both sides are at the highest point position of the pipeline butt end, the deviation detection mechanism starts to work. When the butt surface between the two welding ends has an angle deviation or a position deviation, the push rod is rotated, and the push rod moves to the right to touch the conical groove. The push rod will support the non-center point of the conical groove. At this time, the rotating ball will deflect, and the rotating ball drives the laser transmitter to rotate. With the center of the rotating ball as the fulcrum, the light emitted by the laser transmitter will deviate from the mark point on the whiteboard. Because the whiteboard is far away from the fulcrum, the deflection of the rotating ball acts on the laser transmitter, which will increase the deviation value of the position of the light emitted by the laser transmitter on the whiteboard from the mark point in the center of the whiteboard, thereby amplifying this deviation value, which is convenient for the staff to observe more intuitively, and then adjust through the support adjustment mechanism according to the direction of the deviation, and finally make the position of the light emitted by the laser transmitter on the whiteboard coincide with the mark point, thereby realizing the adjustment of the butt angle.

[0032] 2. The welding device for large-diameter water diversion pipes is provided with scale lines on the push rod. The welding gap L can be calibrated by observing the scale lines on the push rod and cooperating with the support adjustment mechanism. During the use of the present invention, the support and control of the steering tube can be effectively achieved through the support adjustment mechanism. The deviation detection mechanism can concentrate the deviation at one point to avoid large-scale deviation, and can amplify the deviation, which is convenient for position adjustment in the early stage of welding.

[0033] 3. For the welding device for large-diameter water diversion pipelines, the upper movable end of the second hydraulic rod is detachably connected with a support member by means of spiral connection. In order to facilitate the removal of the support member after pipeline welding, the support member can be set in a multi-section spiral connection mode to achieve convenient disassembly. The top end of the support member is rotatably connected with a runner through a rotating shaft. The support member can penetrate into the inner side of the steering pipe to first achieve point support. The top end of the movable plate is also rotatably connected with a third hydraulic rod through a hinge. The top end of the third hydraulic rod is rotatably connected with a clamping member. The bottom edge of the steering pipe is clamped by the clamping member to support and fix the steering pipe. This fixing method can firmly clamp and fix the steering pipe through two points, avoiding the problem of difficult fixation caused by the irregularity of the steering pipe in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 FIG. 6 is a schematic structural diagram of the butt welding of the existing fixed pipe and the steering pipe;

[0035] Figure 2 FIG. 10 is a schematic overall sectional installation structure diagram of the present invention;

[0036] Figure 3 FIG. 14 is a schematic external structure diagram of the support adjustment mechanism of the present invention;

[0037] Figure 4 FIG. 18 is of the present invention Figure 2 Schematic diagram of the structure at position A;

[0038] Figure 5 FIG. 24 is of the present invention Figure 2 Schematic diagram of the structure at position B;

[0039] Figure 6 FIG. 30 is of the present invention Figure 2 Schematic diagram of the structure at position C;

[0040] Figure 7 FIG. 36 is a schematic external structure diagram of the rotating ball part of the present invention;

[0041] Figure 8 FIG. 40 is a schematic overall external structure diagram of the inner hoop and the outer hoop of the present invention;

[0042] Figure 9 FIG. 44 is a schematic external structure diagram of the inner hoop and the outer hoop of the present invention when they are separated;

[0043] Figure 10 FIG. 48 is a schematic installation structure diagram at the pressing hydraulic rod of the present invention;

[0044] Figure 11 FIG. 52 is a schematic installation structure diagram at the motor of the present invention.

[0045] In the figure:

[0046] 1. Fixed pipe; 2. Steering pipe;

[0047] 3. Deviation detection mechanism; 31. Inner hoop; 32. Outer hoop; 33. Suspension ring; 34. Connecting rod; 35. White board; 36. Marking point; 37. Thrust rod; 38. Rotating ball; 39. Counterweight area; 310. Center of gravity area; 311. Laser emitter; 312. Conical groove; 313. First connecting piece; 314. Second connecting piece; 315. Pressing hydraulic rod; 316. Connecting block;

[0048] 4. Support adjustment mechanism; 41. Bottom plate; 42. Leveling piece; 43. Motor; 44. Rotating plate; 45. Slide plate; 46. First electric push rod; 47. Second hydraulic rod; 48. Support piece; 49. Runner; 410. Third hydraulic rod; 411. Movable plate; 412. Second electric push rod; 413. Turntable; 414. Clamping block; 415. L-shaped plate; 416. Screw rod. Specific implementation mode

[0049] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0050] Embodiment 1, please refer to Figures 1-2 、 Figures 4-5 and Figures 7-10 ,the present invention provides a technical solution:

[0051] A welding device for large-diameter water diversion pipelines includes a deviation detection mechanism 3 and a support adjustment mechanism 4 for adjusting the angle and position of the steering pipe 2. The deviation detection mechanism 3 includes two sets of kits, which are respectively arranged at the butt ends of the fixed pipe 1 and the steering pipe 2. Each kit includes an inner hoop 31 on the inner side and an outer hoop 32 on the outer side. The inner hoop 31 can be fixed on the pipeline. A chute is arranged on the outer side of the inner hoop 31. The outer hoop 32 is rotatably arranged on the outer side of the inner hoop 31. A connecting block 316 is fixedly connected to the top end of the outer hoop 32, and a suspension ring 33 is fixedly connected to the bottom end of the outer hoop 32. The central angle between the suspension ring 33 and the connecting block 316 is 180°. A heavy object is suspended on the suspension ring 33 so that both connecting blocks 316 are at the highest point positions of the pipeline butt end;

[0052] The present invention can also be provided with a screw rod spirally connected inside the outer hoop 32. After a heavy object is suspended on the suspension ring 33 so that both connecting blocks 316 are at the highest point positions of the pipeline butt end, the relative fixation between the outer hoop 32 and the inner hoop 31 is realized by rotating the screw rod inside the outer hoop 32.

[0053] A push rod 37 is spirally connected to the inner side of the connection block 316 on the fixed tube 1, and a rotating ball 38 is rotatably connected to the inner side of the connection block 316 on the steering tube 2. A conical groove 312 is provided on the side of the rotating ball 38 facing the fixed tube 1, and a laser emitter 311 is fixedly connected to the inner side of the right end of the rotating ball 38. A connecting rod 34 is fixedly connected to the top end of the outer clamp 32 on the steering tube 2, and the projections of the connecting rod 34 and the laser emitter 311 on the surface of the outer clamp 32 are located on a diameter of the outer clamp 32;

[0054] The right end of the connecting rod 34 is fixedly connected to a whiteboard 35, the middle position of the whiteboard 35 is fixedly connected to a marking point 36, and the bottom end of the rotating ball 38 is fixedly connected to a center of gravity area 310. In the initial state, due to the existence of the center of gravity area 310 in the rotating ball 38, the connecting line of the conical groove 312 and the laser emitter 311 is on the central horizontal axis of the rotating ball 38, and the laser emitted by the laser emitter 311 can irradiate the marking point 36;

[0055] When the butt ends of the fixed tube 1 and the steering tube 2 are butt-jointed, if and only if the push rod 37 is in full contact with the center of the inner surface of the conical groove 312 and the laser line emitted by the laser emitter 311 is irradiated on the marking point 36, it indicates that the butt-jointed angle and butt-jointed surface are correct;

[0056] After the connection blocks 316 on both sides are at the highest point of the pipe butt joint, the deviation detection mechanism 3 starts to work. When the butt joint surface between the two welding ends has an angle deviation or a position deviation, the push rod 37 is rotated, and the push rod 37 moves to the right to touch the conical groove 312. The push rod 37 will support the non-center point of the conical groove 312. At this time, the rotating ball 38 will deflect, and the rotating ball 38 drives the laser emitter 311 to rotate. With the center of the rotating ball 38 as the fulcrum, the light emitted by the laser emitter 311 will deviate from the marking point 36 on the whiteboard 35. Because the whiteboard 35 is far from the fulcrum, the deflection of the rotating ball 38 acts on the laser emitter 311, which increases the deviation value of the position of the light emitted by the laser emitter 311 on the whiteboard 35 from the marking point 36 at the center of the whiteboard 35, thereby amplifying the deviation value, which is convenient for the staff to observe more intuitively, and then according to the direction of the deviation, multiple verifications and adjustments are performed through the support adjustment mechanism 4, and finally the position of the light emitted by the laser emitter 311 on the whiteboard 35 coincides with the marking point 36, thereby achieving the adjustment of the docking angle;

[0057] As a preferred embodiment of the welding device for large diameter water diversion pipes of the present invention, the mandrel 37 is provided with scale lines, and the welding gap L can be calibrated by observing the scale lines on the mandrel 37 and cooperating with the support adjustment mechanism 4.

[0058] During the use of the present invention, the support adjustment mechanism can effectively support and control the steering pipe. The deviation detection mechanism can concentrate the deviation at one point for manifestation, avoiding large-scale deviation search, and can amplify the deviation, facilitating the position adjustment before welding.

[0059] Preferably, as the welding device for large-diameter water diversion pipelines of the present invention, the right end of the ejector rod 37 coincides with the inner side of the right end of the conical groove 312. A counterweight area 39 is also provided at the upper left side of the rotating ball 38 to balance the rotating ball 38 to reach its initial state.

[0060] Preferably, as the welding device for large-diameter water diversion pipelines of the present invention, both the outer hoop 32 and the inner hoop 31 include two upper and lower semi-rings. At the joints of the two upper and lower semi-rings of the inner hoop 31, first connecting members 313 are fixedly connected. The first connecting members 313 at the upper and lower positions are detachably connected by bolts. At the joints of the two upper and lower semi-rings of the outer hoop 32, second connecting members 314 are fixedly connected. The second connecting members 314 at the upper and lower positions are detachably connected by bolts. The second connecting members 314 can slide within the first connecting members 313.

[0061] Preferably, as the welding device for large-diameter water diversion pipelines of the present invention, a pressing hydraulic rod 315 is fixedly connected to the inner side of the inner hoop 31. The inner hoop 31 is fixed outside the pipeline by the extension of the movable end of the pressing hydraulic rod 315. During use, it is necessary to ensure that the two pressing hydraulic rods 315 expand and contract synchronously.

[0062] Example 2. This example is a further improvement of Example 1. The same parts will not be described in detail. Please refer to Figures 1-11 , the support adjustment mechanism 4 includes a bottom plate 41. The top end of the bottom plate 41 is rotatably connected with a rotating plate 44. The top end of the rotating plate 44 is slidably connected with a movable plate 411. The top end of the movable plate 411 is fixedly connected with a second hydraulic rod 47. The upper movable end of the second hydraulic rod 47 is detachably connected by a spiral connection to a support member 48. In order to facilitate the removal of the support member 48 after the pipeline is welded, the support member 48 can be set in a multi-segment spiral connection method to achieve convenient disassembly. The top end of the support member 48 is rotatably connected with a runner 49 through a rotating shaft. The support member 48 can extend into the inner side of the steering pipe 2 to first achieve point support. The top end of the movable plate 411 is also rotatably connected with a third hydraulic rod 410 through a hinge. The top end of the third hydraulic rod 410 is rotatably connected with a clamping member. The steering pipe 2 is supported and fixed by clamping the bottom edge of the steering pipe 2 through the clamping member.

[0063] This fixing method can firmly clamp and fix the steering pipe 2 through two points, avoiding the problem of difficult fixing caused by the irregularity of the steering pipe 2 in the prior art.

[0064] The support member 48 is obliquely placed to the left to move the weight of the steering tube 2 closer to the right, and then it is clamped and fixed again by the clamping member to increase the stability of the support for the steering tube 2;

[0065] Preferably, as the welding device for large-diameter water diversion pipelines of the present invention, the clamping member includes an L-shaped plate 415. The bottom end of the L-shaped plate 415 is rotatably connected to the top end of the third hydraulic rod 410. A groove is formed inside the L-shaped plate 415, and a clamping block 414 is slidably connected to the inside of the groove. The bottom edge of the steering tube 2 is clamped by the clamping block 414 and the inner side of one end of the L-shaped plate 415. The inner side of the clamping block 414 and one end of the L-shaped plate 415 can be set to be arc-shaped to fit the inner and outer edges of the steering tube 2, so as to increase the contact surface with the inner and outer edges of the steering tube 2 and achieve effective fixation. A screw rod 416 is rotatably connected to the inside of the L-shaped plate 415. The screw rod 416 is arranged in the groove, and the outer side of the screw rod 416 is in screw connection with the inner side of the clamping block 414. The other end of the screw rod 416 is fixedly connected to a turntable 413. The position of the clamping block 414 is adjusted by rotating the turntable 413, and the angle of the steering tube 2 in the up and down directions is adjusted by the telescopic movement of the third hydraulic rod 410.

[0066] Preferably, as the welding device for large-diameter water diversion pipelines of the present invention, a leveling member 42 is fixedly connected to the bottom end of the bottom plate 41, and a motor 43 is fixedly connected to the inner side of the bottom end of the bottom plate 41. The end of the main shaft of the motor 43 is fixedly connected to the bottom end of the rotating plate 44. The angle of the steering tube 2 in the front and back directions is adjusted by the rotation of the motor 43.

[0067] Under the above settings, the leveling member 42 in the present invention is a prior art, and its structure is a screw lifting mechanism for leveling the bottom plate 41 and adjusting the height within a certain range, and no redundant elaboration will be made here.

[0068] Preferably, as the welding device for large-diameter water diversion pipelines of the present invention, a limiting groove is formed in the inner side of the left end of the rotating plate 44, and a sliding plate 45 is slidably connected to the inside of the limiting groove. The right end of the sliding plate 45 is fixedly connected to a first electric push rod 46, and the movable end of the first electric push rod 46 is fixedly connected to the left end of the movable plate 411. The position of the steering tube 2 in the left and right directions is adjusted by the first electric push rod 46. A second electric push rod 412 is fixedly connected to the inner side of the front end of the rotating plate 44, and the movable end of the second electric push rod 412 is fixedly connected to the front end of the movable plate 411. The position of the steering tube 2 in the front and back directions is adjusted by the second electric push rod 412.

[0069] The present invention also discloses a use method of the welding device for large-diameter water diversion pipelines, and its steps are as follows:

[0070] Step 1: With the help of a lifting facility, place the steering pipe 2 on the support adjustment mechanism 4. The support member 48 extends into the inner side of the steering pipe 2 to achieve point support first, and the clamping member clamps the bottom edge of the steering pipe 2 to achieve the support and fixation of the steering pipe 2. The lifting facility can be a temporarily erected simple gantry, and the lifting is achieved through a chain hoist.

[0071] Step 2: Install the inner hoop 31 and the outer hoop 32 on the two docking ends of the pipeline respectively. Hang a heavy object on the lifting ring 33 so that both connecting blocks 316 are at the highest point positions of the pipeline docking ends.

[0072] Step 3: Continuously adjust the angle and position of the steering pipe 2 through the support adjustment mechanism 4. When and only when the top rod 37 is in complete contact with the center of the inner surface of the conical groove 312 and the laser line emitted by the laser emitter 311 shines on the marking point 36, it indicates that the docking angle and the docking surface are correct.

[0073] Step 4: The top rod 37 is provided with scale lines. By observing the scale lines on the top rod 37 and cooperating with the support adjustment mechanism 4, the calibration of the welding gap L can be achieved.

[0074] Step 5: After Steps 3 and 4 are completed, weld the pipeline. After the welding is completed, remove the support adjustment mechanism 4 and the deviation detection mechanism 3.

[0075] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for a large diameter water diversion pipeline, comprising a deviation detection mechanism (3) and a support adjustment mechanism (4) for adjusting the angle and position of a steering tube (2), characterized in that: The deviation detection mechanism (3) comprises two sets of kits, which are respectively arranged at the butt ends of the fixed tube (1) and the steering tube (2), each kit comprising an inner hoop (31) on the inside and an outer hoop (32) on the outside, the inner hoop (31) being capable of being fixed on the pipeline, a slide groove being arranged on the outside of the inner hoop (31), the outer hoop (32) being rotatably arranged on the outside of the inner hoop (31), the top end of the outer hoop (32) being fixedly connected to a connecting block (316), the bottom end of the outer hoop (32) being fixedly connected to a lifting ring (33), the arc center angle between the lifting ring (33) and the connecting block (316) being 180 degrees, and a heavy object being hung on the lifting ring (33) so that the connecting blocks (316) on both sides are located at the highest point of the butt end of the pipeline; A push rod (37) is spirally connected to the inner side of the connection block (316) on the fixed tube (1); a rotating ball (38) is rotatably connected to the inner side of the connection block (316) on the steering tube (2); a conical groove (312) is provided on the side of the rotating ball (38) facing the fixed tube (1); a laser emitter (311) is fixedly connected to the inner side of the right end of the rotating ball (38); a connecting rod (34) is fixedly connected to the top end of the outer hoop (32) on the steering tube (2); and projections of the connecting rod (34) and the laser emitter (311) on the surface of the outer hoop (32) are located on a diameter of the outer hoop (32); The right end of the connecting rod (34) is fixedly connected to a whiteboard (35), the middle position of the whiteboard (35) is fixedly connected to a marking point (36), and the bottom end of the rotating ball (38) is fixedly connected to a center of gravity area (310). In the initial state, due to the existence of the center of gravity area (310) in the rotating ball (38), the connecting line between the conical groove (312) and the laser emitter (311) is on the central horizontal axis of the rotating ball (38), and the laser emitted by the laser emitter (311) can irradiate the marking point (36); When the butt ends of the fixed tube (1) and the steering tube (2) are butt-jointed, when and only when the push rod (37) is in complete contact with the center of the inner surface of the conical groove (312), the laser line emitted by the laser emitter (311) is irradiated on the marking point (36), it indicates that the butt joint angle and the butt joint surface are correct, and the right end of the push rod (37) is consistent with the inner side of the right end of the conical groove (312). A counterweight area (39) is also provided at the upper left end of the rotating ball (38) for balancing the rotating ball (38) to achieve the initial state of the rotating ball (38); The support adjustment mechanism (4) comprises a bottom plate (41), the top end of the bottom plate (41) is rotatably connected to a rotating plate (44), the top end of the rotating plate (44) is slidably connected to a movable plate (411), the top end of the movable plate (411) is fixedly connected to a second hydraulic rod (47), the upper movable end of the second hydraulic rod (47) is detachably connected to a support member (48) by means of a screw connection, the top end of the support member (48) is rotatably connected to a rotating wheel (49) via a rotating shaft, the support member (48) can penetrate into the inner side of the steering tube (2) to first realize point support, the top end of the movable plate (411) is also rotatably connected to a third hydraulic rod (410) via a hinge, the top end of the third hydraulic rod (410) is rotatably connected to a clamping member, and the bottom end edge of the steering tube (2) is clamped by the clamping member to realize support and fixation of the steering tube (2).

2. The welding device for large diameter water diversion pipeline according to claim 1, characterized in that: The push rod (37) is provided with scale lines, and the welding gap L can be calibrated by observing the scale lines on the push rod (37) and cooperating with the support adjustment mechanism (4).

3. The welding device for large diameter water diversion pipeline according to claim 2, characterized in that: The outer hoop (32) and the inner hoop (31) both comprise an upper and lower half ring; the connection between the upper and lower half rings of the inner hoop (31) is fixedly connected to a first connection piece (313); the first connection pieces (313) at the upper and lower positions are detachably connected by bolts; the connection between the upper and lower half rings of the outer hoop (32) is fixedly connected to a second connection piece (314); the second connection pieces (314) at the upper and lower positions are detachably connected by bolts; and the second connection piece (314) can slide inside the first connection piece (313).

4. The welding device for large diameter water diversion pipeline according to claim 3 is characterized in that: A clamping hydraulic rod (315) is fixedly connected to the inner side of the inner clamp (31), and the inner clamp (31) is fixed to the outer side of the pipeline by extending the movable end of the clamping hydraulic rod (315).

5. The welding device for large diameter water diversion pipeline according to claim 1, characterized in that: The clamping member comprises an L-shaped plate (415), the bottom end of the L-shaped plate (415) being rotatably connected to the top end of the third hydraulic rod (410), a groove being provided on the inner side of the L-shaped plate (415), a clamping block (414) being slidably connected to the inner side of the groove, the bottom edge of the steering tube (2) being clamped by the clamping block (414) and the inner side of one end of the L-shaped plate (415), a screw rod (416) being rotatably connected to the inner side of the L-shaped plate (415), the screw rod (416) being arranged in the groove, the outer side of the screw rod (416) being spirally connected to the inner side of the clamping block (414), the other end of the screw rod (416) being fixedly connected to a rotating disk (413), the position of the clamping block (414) being adjusted by rotating the rotating disk (413), and the vertical angle of the steering tube (2) being adjusted by telescoping the third hydraulic rod (410).

6. The welding device for large diameter water diversion pipeline according to claim 5, characterized in that: A leveling member (42) is fixedly connected to the bottom end of the bottom plate (41), a motor (43) is fixedly connected to the inner side of the bottom end of the bottom plate (41), a main shaft end of the motor (43) is fixedly connected to the bottom end of the rotating plate (44), and the front-rear angle of the steering tube (2) is adjusted by the rotation of the motor (43).

7. The welding device for large diameter water diversion pipeline according to claim 6, characterized in that: A limiting groove is provided on the inner side of the left end of the rotating plate (44), and a slide plate (45) is slidably connected to the inner side of the limiting groove. A first electric push rod (46) is fixedly connected to the right end of the slide plate (45), and a movable end of the first electric push rod (46) is fixedly connected to the left end of the movable plate (411). The position adjustment of the steering tube (2) in the left-right direction is achieved through the first electric push rod (46). A second electric push rod (412) is fixedly connected to the inner side of the front end of the rotating plate (44), and a movable end of the second electric push rod (412) is fixedly connected to the front end of the movable plate (411). The position adjustment of the steering tube (2) in the front-back direction is achieved through the second electric push rod (412).

8. The method for using the welding device for a large diameter water diversion pipeline according to claim 7, characterized in that: The steps are: Step 1: With the help of a lifting device, the steering tube (2) is placed on the support adjustment mechanism (4), the support member (48) penetrates into the inner side of the steering tube (2) to first realize point support, and the clamping member clamps the bottom edge of the steering tube (2) to realize support and fixation of the steering tube (2); Step 2: Install the inner clamp (31) and the outer clamp (32) on the two butt ends of the pipe respectively, and hang a heavy object on the lifting ring (33) so that the connecting blocks (316) on both sides are at the highest point of the butt ends of the pipe; Step 3: Continuously adjust the angle and position of the steering tube (2) through the support adjustment mechanism (4). When and only when the push rod (37) is completely in contact with the center of the inner surface of the conical groove (312), and the laser line emitted by the laser emitter (311) shines on the marking point (36), it indicates that the docking angle and docking surface are correct; Step 4: The push rod (37) is provided with scale lines, and the welding gap L can be calibrated by observing the scale lines on the push rod (37) and cooperating with the support adjustment mechanism (4); Step 5: After step 3 and step 4 are completed, the pipeline is welded. After welding is completed, the support adjustment mechanism (4) and the deviation detection mechanism (3) are removed.

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