A device for welding longitudinal seams of steel pipes

Abstract

The present invention relates to a device for welding longitudinal seams of steel pipes, and belongs to the technical field of welding devices. It comprises an operating table, and two tracks are symmetrically arranged on the two side edges of the top of the operating table, and the same gantry is slidably arranged on the two tracks, and a welding gun for welding the longitudinal seams of steel pipes is arranged at the bottom of the gantry. By setting a positioning support mechanism, the present invention can directly support and place the semicircular steel pipe in position, which not only saves the investment in equipment, but also improves the docking efficiency, and is simpler and more convenient to operate; by setting a positioning mechanism, not only can the port position of the steel pipe be aligned and adjusted, but also the lower longitudinal seam position can be pressed and positioned, thereby improving the stability of the steel pipe welding; at the same time, it can also achieve the effect of automatically stopping the rotation of the steel pipe, which not only reduces the time for subsequent manual adjustment, but also makes the positioning accuracy more precise, further improves the degree of automation, and thus improves work efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of welding devices and relates to a longitudinal seam welding device for steel pipes. Background Art

[0002] At present, many industries in my country, such as power towers, communication towers, oil pipelines, pressure vessels, boiler headers, etc., use large-diameter steel pipes. The production of large-diameter steel pipes generally adopts the pressing method of hot pressing and cold precision calibration. The steel plate is pressed into two 180-degree tile-shaped pieces on the hydraulic press, and then the two 180-degree tile-shaped steel plates are connected to form a circular steel pipe, and finally welded.

[0003] The welding of large-diameter steel pipes is generally carried out in a gantry-moving and fixed workpiece welding method. The moving speed of the welding gantry adopts variable frequency stepless speed regulation to meet the adjustment needs of the welding speed, and the 180-degree tile-shaped steel plate is supported and positioned by a roller seat. The roller seat uses a screw to adjust the distance between the two rollers to adapt to the welding of steel pipes with different inner diameters, and to make the longitudinal seam in a horizontal position, and finally the longitudinal seam welding is carried out. However, traditional welding equipment only supports and positions the steel pipe through the roller seat. Although it can be used for welding steel pipes with different inner diameters and has a wide range of applications, it is very inconvenient to operate when only relying on the roller seat for support during positioning. Two 180-degree tile-shaped steel plates need to be suspended at the same time for docking, and after docking, the horizontal position of the weld needs to be adjusted by rotating the roller. After the upper longitudinal seam is welded, the upper and lower longitudinal seams need to be interchanged again by rotating the roller. The traditional position interchange requires the operator to make multiple adjustments and rely on the operator's experience and judgment. This method is time-consuming and labor-intensive, and the operation is very troublesome, resulting in low work efficiency and poor positioning accuracy. Therefore, we propose a longitudinal seam welding device for steel pipes to solve the above-mentioned problems. Summary of the invention

[0004] In view of this, the present invention provides a longitudinal seam welding device for steel pipes in order to solve the problem that the traditional welding device is not only time-consuming and labor-intensive to use, but also cumbersome to operate, resulting in low work efficiency and poor positioning accuracy.

[0005] To achieve the above object, the present invention provides the following technical solution: comprising an operating table, two rails are symmetrically arranged on the top and two side edges of the operating table, a gantry is slidably arranged on the two rails, and a welding gun for welding the longitudinal seam of the steel pipe is arranged at the bottom of the gantry;

[0006] Two sets of roller seats are symmetrically fixedly connected to the top of the operating table and are used for supporting, positioning and rotating the steel pipe;

[0007] Multiple groups of alignment support mechanisms are fixedly arranged on the top of the operating table and are respectively used in conjunction with the two groups of roller seats to provide alignment support between two sections of semicircular steel pipes;

[0008] The positioning mechanism is arranged on the top of the operating table at one side away from the gantry, and is used to align the aligned steel pipes and to position the overall rotation of the steel pipes.

[0009] Furthermore, the alignment support mechanism includes a fixed seat fixedly connected to the top of the operating table, a bottom groove is opened at the bottom of the fixed seat, a sliding seat is slidably connected inside the bottom groove, two first guide rods are symmetrically fixedly connected inside the bottom groove, and the two first guide rods both slide through the sliding seat, two first springs are symmetrically sleeved on the two first guide rods, and two ends of the first springs are respectively fixedly connected to one side of the sliding seat and the inner wall of the bottom groove.

[0010] Furthermore, a first sliding hole is opened at the bottom of the operating table, and the bottom of the sliding seat passes through the first sliding hole and extends downward.

[0011] Furthermore, a second sliding hole is opened at the top of the fixing seat, and the top of the sliding seat passes through the second sliding hole and is flush with the top of the fixing seat.

[0012] Furthermore, a first mounting slot is provided at the top of the sliding seat, a support seat is slidably connected inside the first mounting slot, and the top of the support seat extends upward, third guide rods are slidably embedded in the four corners of the bottom of the support seat, the bottom ends of the four third guide rods extend downward and are fixedly connected to the bottom wall of the first mounting slot, the outer walls of the four third guide rods are sleeved with third springs, and the two ends of the third springs are respectively fixedly connected to the bottom wall of the first mounting slot and the bottom of the support seat.

[0013] Furthermore, a second mounting slot is provided at the top of the support seat, and a rotating rod is connected to the inside of the second mounting slot in a transversely rotatable manner. The outer wall of the rotating rod is symmetrically fixed with two rotating blocks, and the tops of the two rotating blocks are flush with the top of the support seat. A driving member is provided inside the support seat for driving the two rotating blocks to rotate simultaneously.

[0014] Furthermore, the driving member includes an installation cavity opened inside the support seat, and two second guide rods are symmetrically fixedly connected inside the installation cavity. The outer walls of the two second guide rods are slidingly sleeved with the same vertical plate, and the outer walls of the two second guide rods are symmetrically sleeved with two second springs, and the two ends of the second springs are respectively fixedly connected to one side of the vertical plate and the inner wall of the installation cavity.

[0015] Furthermore, the bottom wall of the second mounting slot is provided with a third sliding hole connected to the mounting cavity, the top of the vertical plate passes through the third sliding hole and is fixedly connected with a rack, the outer wall of the rotating rod is fixedly sleeved with a gear located between the two rotating blocks, and the gear is meshed with the rack.

[0016] Furthermore, the bottom wall of the mounting cavity is slidably connected to a first slider, and the bottom end of the vertical plate is fixedly connected to the top of the first slider, and the sides of the first sliders that are away from each other are fixedly connected to abutment rods, and the two abutment rods extend to the outside of the support seat and intermittently interfere with the inner walls on both sides of the second sliding hole respectively.

[0017] Furthermore, three sliding grooves are arranged side by side and equidistantly at the bottom of the first sliding block, and the inside of the three sliding grooves are slidably connected with a clamping rod, and the top of the three clamping rods are fixedly connected to the top wall of the corresponding sliding groove with the same compression spring, and the bottom wall of the installation cavity is symmetrically provided with two clamping holes used in conjunction with the clamping rods, and the bottom wall of the first installation slot is symmetrically fixedly connected with two top rods used in conjunction with the clamping holes.

[0018] Furthermore, the positioning mechanism includes a sliding plate slidably connected to one side of the top of the operating table, a screw motor is fixedly connected to one side of the top of the operating table, a screw rod is fixedly connected to the output shaft of the screw motor, the screw rod thread passes through one side of the sliding plate, a fixed block is fixedly connected to the top of the operating table, and the end of the screw rod away from the screw motor is rotatably connected to one side of the fixed block.

[0019] Furthermore, a fourth sliding hole is opened on one side of the sliding plate, and a second sliding block slides through the fourth sliding hole, and an electric push rod is fixedly connected to the side of the sliding plate away from the gantry, and the output end of the electric push rod is fixedly connected to the top side of the second sliding block, and the side of the second sliding block close to the gantry is rotatably connected to a rotating shaft, and the other end of the rotating shaft is fixedly connected to a connecting block, and an adjusting screw is threaded through the top of the connecting block, and the bottom end of the adjusting screw is rotatably connected to an arc-shaped pressure block.

[0020] Furthermore, an infrared transmitter is fixedly connected to the top of the sliding plate away from the electric push rod, an infrared receiver located directly below the infrared transmitter is fixedly connected to one side of the sliding plate, and the infrared receiver is used in conjunction with the infrared transmitter, a support block is fixedly connected to one side of the arc-shaped pressure block, and a support rod that is intermittently used in conjunction with the infrared receiver is fixedly connected to the side of the support block away from the arc-shaped pressure block.

[0021] The beneficial effects of the present invention are:

[0022] The present invention can directly support and place the semicircular steel pipe in position through the cooperation between the fixed seat, the sliding seat, the supporting seat and the roller seat, and the position of the butted longitudinal seam is exactly in a horizontal position, without the need for subsequent adjustment, and at the same time there is no need to lift the two semicircular steel pipes for butt connection at the same time, which not only saves the investment in equipment, but also improves the butt connection efficiency, and is simpler and more convenient to operate; by setting the positioning mechanism, not only can the port position of the steel pipe be aligned and adjusted by the sliding plate, but also the lower longitudinal seam position can be pressed and positioned by the arc-shaped pressing block, thereby improving the stability of steel pipe welding; at the same time, when the steel pipe rotates and the upper and lower longitudinal seam positions are interchanged, it can also drive the support rod to rotate, and cooperate with the infrared receiver and the infrared transmitter to achieve the effect of automatically stopping the rotation of the steel pipe after rotating 180 degrees, which not only reduces the time for subsequent manual adjustment, but also makes the positioning accuracy more precise, further improves the degree of automation, and thus improves work efficiency.

[0023] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0025] Figure 1 This is a three-dimensional diagram of the overall structure of a device for welding longitudinal seams of steel pipes according to the present invention;

[0026] Figure 2 This is a bottom view of the overall structure of a device for welding longitudinal seams of steel pipes according to the present invention;

[0027] Figure 3 This is a three-dimensional diagram of the overall structure of a fixing base for a steel pipe longitudinal seam welding device of the present invention;

[0028] Figure 4 This is a three-dimensional bottom view of the overall structure of a fixing base for a steel pipe longitudinal seam welding device of the present invention;

[0029] Figure 5 This is a three-dimensional diagram of the overall structure of a sliding seat for a steel pipe longitudinal seam welding device of the present invention;

[0030] Figure 6 This is a three-dimensional cross-sectional view of the overall structure of a sliding seat for a steel pipe longitudinal seam welding device of the present invention;

[0031] Figure 7 This is a three-dimensional cross-sectional view of the overall structure of a support base for a steel pipe longitudinal seam welding device of the present invention;

[0032] Figure 8 It is a three-dimensional left view of the overall structure of a positioning mechanism for a steel pipe longitudinal seam welding device of the present invention;

[0033] Fig. 9 It is a three-dimensional right view of the overall structure of a positioning mechanism for a steel pipe longitudinal seam welding device of the present invention;

[0034] Fig.10 A three-dimensional diagram of the structure of a semicircular steel pipe used in a steel pipe longitudinal seam welding device according to the present invention, respectively cooperating with a fixing seat and a roller seat;

[0035] Fig.11 This is a three-dimensional diagram of the overall structure of two sections of semicircular steel pipes positioned and installed on the device.

[0036] Figure numerals: 1, operating table; 2, track; 3, roller seat; 4, gantry; 5, welding gun; 6, fixed seat; 7, bottom groove; 8, sliding seat; 9, first sliding hole; 10, first mounting notch; 11, first guide rod; 12, first spring; 13, second sliding hole; 14, supporting seat; 15, second mounting notch; 16, rotating rod; 17, gear; 18, rotating block; 19, mounting cavity; 20, first slider; 21, push rod; 22, vertical plate; 23, rack; 24, third sliding hole; 25, The second guide rod; 26, the second spring; 27, the slide groove; 28, the clamping rod; 29, the compression spring; 30, the clamping hole; 31, the push rod; 32, the third guide rod; 33, the third spring; 34, the sliding plate; 35, the screw motor; 36, the screw rod; 37, the infrared transmitter; 38, the electric push rod; 39, the fourth slide hole; 40, the second slider; 41, the fixed block; 42, the infrared receiver; 43, the rotating shaft; 44, the connecting block; 45, the adjusting screw; 46, the arc pressure block; 47, the support block; 48, the support rod. DETAILED DESCRIPTION

[0037] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict. Example

[0038] like Figure 1As shown, a device for welding longitudinal seams of steel pipes comprises an operating table 1, two tracks 2 are symmetrically provided on both side edges of the top of the operating table 1, a same gantry 4 is slidably provided on the two tracks 2, a welding gun 5 for welding the longitudinal seams of the steel pipes is provided at the bottom of the gantry 4, two groups of roller seats 3 are symmetrically fixedly connected to the top of the operating table 1, which are used for supporting, positioning and rotating the steel pipes, the roller seats 3 adopt a screw adjustment method, that is, the distance between the two rollers on the roller seats 3 is adjusted by a manual screw, and the distance between the two rollers is adjusted according to the welding needs so that the longitudinal seam is in a horizontal position to meet the welding of steel pipes with different inner diameters. The roller seats 3 are prior art and will not be described in detail in the present invention.

[0039] The present application can be used in the field of steel pipe longitudinal seam welding devices, and can also be applied to other fields of the present application. Example

[0040] This embodiment is a further improvement of the previous embodiment: Figure 1 - Figure 5 As shown, the welding device also includes a plurality of alignment support mechanisms fixedly arranged on the top of the operating table 1, and are used in conjunction with two groups of roller seats 3 respectively, for alignment support between two sections of semicircular steel pipes; the alignment support mechanism includes a fixed seat 6 fixedly connected to the top of the operating table 1, a bottom groove 7 is provided at the bottom of the fixed seat 6, a sliding seat 8 is slidably connected inside the bottom groove 7, two first guide rods 11 are symmetrically fixedly connected inside the bottom groove 7, and the two first guide rods 11 both slide through the sliding seat 8, two first springs 12 are symmetrically sleeved on the two first guide rods 11, and the two ends of the first spring 12 are respectively fixedly connected to one side of the sliding seat 8 and the inner wall of the bottom groove 7, a first sliding hole 9 is provided at the bottom of the operating table 1, the bottom of the sliding seat 8 penetrates the first sliding hole 9 and extends downward, a second sliding hole 13 is provided at the top of the fixed seat 6, the top of the sliding seat 8 penetrates the second sliding hole 13 and is flush with the top of the fixed seat 6. When the sliding seat 8 slides back and forth on the two first guide rods 11 in the bottom groove 7, it can move back and forth in the first sliding hole 9 and the second sliding hole 13, and the movement of the sliding seat 8 is limited by the first sliding hole 9 and the second sliding hole 13; when the sliding seat 8 moves back and forth, the sliding seat 8 can be strongly reset by simultaneously squeezing two of the first springs 12 and stretching the other two first springs 12. When the sliding seat 8 is reset and is in the initial state, it is exactly located in the middle position of the first sliding hole 9 and the second sliding hole 13 at the same time.

[0041] In one aspect of the present embodiment, a first mounting slot 10 is provided at the top of the sliding seat 8, a support seat 14 is slidably connected inside the first mounting slot 10, and the top of the support seat 14 extends upward, and third guide rods 32 are slidably embedded at the four corners of the bottom of the support seat 14, and the bottom ends of the four third guide rods 32 extend downward and are fixedly connected to the bottom wall of the first mounting slot 10, and the outer walls of the four third guide rods 32 are sleeved with third springs 33, and the two ends of the third springs 33 are respectively fixedly connected to the bottom wall of the first mounting slot 10 and the bottom of the support seat 14. Fig.10 As shown, when one of the semicircular steel pipes is overlapped on the fixed seat 6 through one of the rollers on the roller seat 3, the inner side of the steel pipe will conflict with one side of the support seat 14, and will slide with the self-gravity of the steel pipe, while pushing the support seat 14 to move, and the support seat 14 also drives the sliding seat 8 to slide. When the sliding seat 8 moves to the maximum stroke, the support seat 14 can no longer move. At this time, the support seat 14 can resist the steel pipe and cooperate with the positioning of the roller seat 3 to complete the alignment of one of the semicircular steel pipes, and the vertical center line of the semicircular steel pipe is just in line with the welding line of the welding gun 5. The positions correspond to each other; after one of the semicircular steel pipes is placed in position, the other semicircular steel pipe is overlapped on the top of the support seat 14 through another roller on the roller seat 3. Similarly, under the self-gravity of the steel pipe, the support seat 14 will be driven to move downward, so that the support seat 14 slides downward in the first installation groove 10 and squeezes multiple third springs 33. When the support seat 14 moves down to be flush with the top surface of the fixing seat 6, the other semicircular steel pipe is overlapped on the fixing seat 6 at this time, so that it is just in contact with the previous semicircular steel pipe to form a complete steel pipe, and the formed longitudinal seam is just on the welding track of the welding gun 5, such as Fig.11 As shown, after the two semicircular steel pipes are butt-jointed, the height of the welding gun 5 is adjusted, and then the gantry 4 is driven to move to complete the welding of the longitudinal seam of the entire steel pipe. Example

[0042] This embodiment is a further improvement of the previous embodiment: Figure 1 - Figure 7 As shown, the top of the support seat 14 is provided with a second mounting slot 15, the interior of the second mounting slot 15 is connected with a rotating rod 16 in a transverse rotational manner, the outer wall of the rotating rod 16 is symmetrically fixed with two rotating blocks 18, and the tops of the two rotating blocks 18 are flush with the top of the support seat 14, and the interior of the support seat 14 is provided with a driving member for driving the two rotating blocks 18 to rotate simultaneously. Fig.10As shown, when the semicircular steel pipe pushes the support seat 14 to move to one side to the maximum stroke, the two rotating blocks 18 can be driven to rotate by the driving member, so that the two rotating blocks 18 are both in an inclined state, and their inclined surfaces are set in the opposite direction to the semicircular steel pipe in conflict, and after the two rotating blocks 18 are rotated, the side close to the semicircular steel pipe is flush with the side adjacent to the support seat 14, which can ensure that the whole can slide downward normally without causing any obstruction; when the other semicircular steel pipe is placed on the support seat 14, the support seat 14 can be pressed downward. At this time, the inclined surface of the rotating block 18 can ensure the normal downward pressure on the support seat 14, and the rotating block 18 can be used to move upward The raised side can always maintain resistance to the previous semicircular steel pipe, so that it will not slide on its own; when the rotating block 18 is completely pressed into the second sliding hole 13, the two semicircular steel pipes just conflict with each other to form a complete steel pipe; after the two semicircular steel pipes are docked, their positions are directly aligned, and the weld position does not need to be adjusted, thereby improving work efficiency; and no matter which semicircular steel pipe is supported first, the support seat 14 can slide to both sides, and after sliding to the end, it can drive the two rotating blocks 18 to rotate, but the rotation directions are inconsistent, so as to facilitate the docking of the other semicircular steel pipe.

[0043] In one aspect of the present embodiment, the driving member includes an installation cavity 19 opened inside the support seat 14, and two second guide rods 25 are symmetrically fixedly connected inside the installation cavity 19. The outer walls of the two second guide rods 25 are slidingly sleeved with the same vertical plate 22, and the outer walls of the two second guide rods 25 are symmetrically sleeved with two second springs 26, and the two ends of the second springs 26 are respectively fixedly connected to one side of the vertical plate 22 and the inner wall of the installation cavity 19. The bottom wall of the second installation slot 15 is opened with a third sliding hole 24 connected to the installation cavity 19, and the top of the vertical plate 22 passes through the third sliding hole 24 and is fixedly connected with a rack 23. The outer wall of the rotating rod 16 is fixedly sleeved with a gear 17 located between the two rotating blocks 18, and the gear 17 is meshed with the rack 23. When the vertical plate 22 moves back and forth on the two second guide rods 25, two of the second springs 26 can be squeezed and the other two second springs 26 can be stretched at the same time, so as to drive the vertical plate 22 to reset with force; and the vertical plate 22 slides back and forth in the third sliding hole 24, and at the same time drives the rack 23 to move back and forth, and then drives the rotating rod 16 to rotate back and forth through the meshing movement with the gear 17, so as to achieve the effect of driving the rotating block 18 to rotate back and forth.

[0044] In one aspect of the present embodiment, the bottom wall of the installation cavity 19 is slidably connected to the first slider 20, and the bottom end of the vertical plate 22 is fixedly connected to the top of the first slider 20. The first slider 20 is fixedly connected to the side away from each other with a push rod 21. The two push rods 21 extend to the outside of the support seat 14 and intermittently contact and cooperate with the inner walls of the two sides of the second slide hole 13. When the support seat 14 slides to one side under the force of the semicircular steel pipe, one end of one of the push rods 21 contacts the inner wall of one side of the second slide hole 13 and extends inward, while pushing the first slider 20 to slide. The first slider 20 drives the other push rod 21 to extend outward, and also drives the vertical plate 22 to move, and then drives the rack 23 to move, and drives the rotating rod 16 to rotate through the meshing with the gear 17, thereby driving the rotating block 18 to rotate. Example

[0045] This embodiment is a further improvement of the previous embodiment: Figure 1 - Figure 7As shown, three slide grooves 27 are arranged side by side and equidistantly at the bottom of the first slider 20, and the inside of the three slide grooves 27 are slidably connected with a clamping rod 28. The top ends of the three clamping rods 28 are fixedly connected to the top walls of the corresponding slide grooves 27 with the same compression spring 29, and the bottom wall of the mounting cavity 19 is symmetrically provided with two clamping holes 30 used in conjunction with the clamping rod 28, and the bottom wall of the first mounting slot 10 is symmetrically fixedly connected with two top rods 31 used in conjunction with the clamping holes 30. When the support seat 14 is subjected to the force of one of the semicircular steel tubes to slide to one side, the first slide block 20 can be pushed to slide by the push rod 21 against the inner wall of one side of the second sliding hole 13, completing the rotation of the rotating block 18. At this time, the first slide block 20 simultaneously drives the three clamping rods 28 to move. When the support seat 14 moves to the maximum stroke, the rotating block 18 completes the maximum angle rotation. At this time, two of the clamping rods 28 just correspond to the two clamping holes 30 respectively, and under the elastic force of the compression spring 29, the clamping rod 28 can be pushed to be clamped in the clamping hole 30, completing the clamping effect of the first slide block 20, so that the rotating block 18 maintains a stable state and does not flip during the downward movement; when the rotating block 18 is forced to fully enter the second sliding hole 13, the two semicircular steel tubes just complete the resistance docking, and after the support seat 14 moves downward for a distance, the top end of the push rod 31 can enter the clamping hole 30 and resist and push the bottom end of the clamping rod 28. The continued downward movement of the support seat 14 can push the clamping rod 28 upward out of the clamping hole 30 through the push rod 31. At this time, since the rotating block 18 is pressed into the second sliding hole 13 and no longer conflicts with the side edge of the semicircular steel pipe, the vertical plate 22 and the first sliding block 20 will be driven to reset under the elastic force of the second spring 26, and the rotating block 18 will be driven to reset and rotate through the meshing of the rack 23 and the gear 17. However, the entire support seat 14 and the rotating block 18 are still pressed down by the steel pipe. Due to the large pressure, the support seat 14 and the sliding seat 8 will not be reset to the initial state immediately, but there is no effect on the entire equipment, because the alignment support of the steel pipe has been completed. Only after the entire steel pipe is welded and removed, the entire sliding seat 8 will drive the support seat 14 to reset to the initial state under the elastic force of the first spring 12, and the support seat 14 will automatically reset upward under the elastic force of the third spring 33, which is convenient for the alignment support of the next steel pipe. Example

[0046] This embodiment is a further improvement of the previous embodiment: Figure 1 , Figure 8 , Fig. 9As shown, the welding device also includes a positioning mechanism arranged at the top of the operating platform 1 away from the gantry 4, which is used to align the steel pipe after alignment and position the overall rotation of the steel pipe; the positioning mechanism includes a sliding plate 34 slidably connected to one side of the top of the operating platform 1, a screw motor 35 is fixedly connected to one side of the top of the operating platform 1, a screw rod 36 is fixedly connected to the output shaft of the screw motor 35, the screw rod 36 threadedly penetrates one side of the sliding plate 34, a fixed block 41 is fixedly connected to the top of the operating platform 1, and one end of the screw rod 36 away from the screw motor 35 is rotatably connected to one side of the fixed block 41. When the alignment support of the two semicircular steel pipes is completed, the butt joint of the weld seam is in the state of completion, but the pipe mouths of the two semicircular steel pipes may be misaligned. At this time, the screw motor 35 is started to drive the screw rod 36 to rotate, which can drive the sliding plate 34 to move, and the sliding plate 34 is moved against the pipe mouth of one end of the steel pipe, so that the two ends of the two semicircular steel pipes can be aligned and adjusted for welding.

[0047] In one aspect of the present embodiment, a fourth sliding hole 39 is provided on one side of the sliding plate 34, and a second sliding block 40 is slidably penetrated in the fourth sliding hole 39. An electric push rod 38 is fixedly connected to the side of the sliding plate 34 away from the gantry 4, and the output end of the electric push rod 38 is fixedly connected to the top side of the second sliding block 40. A rotating shaft 43 is rotatably connected to the side of the second sliding block 40 close to the gantry 4, and a connecting block 44 is fixedly connected to the other end of the rotating shaft 43. An adjusting screw 45 is threadedly penetrated through the top of the connecting block 44, and an arc-shaped pressing block 46 is rotatably connected to the bottom end of the adjusting screw 45. The height of the arc-shaped pressing block 46 can be adjusted by rotating the adjusting screw 45. When the sliding plate 34 is used to align the ports of the semicircular steel pipe, the connecting block 44, the adjusting screw 45 and the arc-shaped pressing block 46 can all enter the interior of the steel pipe without causing interference with the steel pipe. After the ports of the steel pipe are aligned, the lead screw motor 35 is started again to drive the sliding plate 34 to move back a certain distance, so that the arc-shaped pressing block 46 is located on the side of the steel pipe close to the opening, such as Fig.11 As shown, at this time, the adjusting screw 45 is rotated again to drive the arc-shaped pressing block 46 to move downward, and press the lower gap where the two semicircular steel pipes are connected to ensure the stability of the steel pipes during welding. Example

[0048] This embodiment is a further improvement of the previous embodiment: Figure 8 , Fig. 9 As shown, an infrared transmitter 37 is fixedly connected to the top of the side of the sliding plate 34 away from the electric push rod 38, an infrared receiver 42 located directly below the infrared transmitter 37 is fixedly connected to one side of the sliding plate 34, and the infrared receiver 42 is used in conjunction with the infrared transmitter 37, a support block 47 is fixedly connected to one side of the arc-shaped pressing block 46, and a support rod 48 that is intermittently used in conjunction with the infrared receiver 42 is fixedly connected to the side of the support block 47 away from the arc-shaped pressing block 46. Fig.11 As shown, after the two semicircular steel pipes are butt-jointed and positioned and adjusted, the longitudinal seam above the steel pipe is welded first by the welding gun 5. After the welding is completed, the steel pipe needs to be rotated 180 degrees by rotating the roller on the roller seat 3, and then the longitudinal seam below is welded. Since the arc-shaped pressing block 46 is pressed against the weld below the steel pipe, the arc-shaped pressing block 46 will be driven to rotate at the same time during the entire rotation of the steel pipe. At the same time, the connecting block 44 and the rotating shaft 43 are driven to rotate by driving the adjusting screw 45. During the rotation of the arc-shaped pressing block 46, the support block 47 and the support rod 48 will be driven to rotate at the same time. When the support rod 48 rotates to between the infrared receiver 42 and the infrared transmitter 37, the light beam emitted by the infrared transmitter 37 will be blocked. When the infrared receiver 42 does not receive the light beam, the steel pipe will be controlled to stop rotating. A driving member for driving the roller to rotate is provided on the roller seat 3. The rotation drives the steel pipe to rotate, and the infrared receiver 42 can be electrically controlled and connected to the driving member. When the infrared receiver 42 does not receive the light beam, the driving member stops working, that is, the roller stops rotating; that is, when the support rod 48 rotates 180 degrees, the steel pipe stops rotating and also rotates 180 degrees, so that the longitudinal seam below is rotated 180 degrees to the top, and then the longitudinal seam is welded by the welding gun 5 to complete the welding work of the entire steel pipe. There is no need to adjust the position of the longitudinal seam multiple times, which saves time and improves work efficiency; in addition, when the screw motor 35 is started to drive the sliding plate 34 to move and position the steel pipe, one side of the support block 47 can be made to contact the side of the port of the steel pipe, so that when the adjusting screw 45 is rotated, the arc pressure block 46 can be prevented from rotating with the adjusting screw 45 through the limit of the support block 47, thereby facilitating better operation.

[0049] However, as is well known to those skilled in the art, the working principles and wiring methods of the roller seat 3, gantry 4, welding gun 5, screw motor 35, infrared transmitter 37, electric push rod 38 and infrared receiver 42 are commonplace, and are all conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any optional selections according to their needs or convenience.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A device for welding longitudinal seams of steel pipes, characterized in that: include: An operating table (1), wherein two rails (2) are symmetrically arranged on both side edges of the top of the operating table (1), a gantry (4) is slidably arranged on the two rails (2), and a welding gun (5) for welding the longitudinal seam of the steel pipe is arranged at the bottom of the gantry (4); Two sets of roller seats (3) are symmetrically fixedly connected to the top of the operating table (1) and are used for supporting, positioning and rotating the steel pipe; A plurality of alignment support mechanisms are fixedly arranged on the top of the operating table (1) and are respectively used in conjunction with the two groups of roller seats (3) to provide alignment support between the two sections of semicircular steel pipes; A positioning mechanism is arranged on a side of the top of the operating table (1) away from the gantry (4), and is used to align the aligned steel pipe and to position the overall rotation of the steel pipe; The alignment support mechanism comprises a fixed seat (6) fixedly connected to the top of the operating table (1), a bottom groove (7) being provided at the bottom of the fixed seat (6), a sliding seat (8) being slidably connected inside the bottom groove (7), two first guide rods (11) being symmetrically fixedly connected inside the bottom groove (7), and the two first guide rods (11) both slidably penetrate the sliding seat (8), two first springs (12) being symmetrically sleeved on the two first guide rods (11), and two ends of the first springs (12) being respectively fixedly connected to one side of the sliding seat (8) and the inner wall of the bottom groove (7); A first sliding hole (9) is formed at the bottom of the operating table (1), and the bottom of the sliding seat (8) passes through the first sliding hole (9) and extends downward; A second sliding hole (13) is formed at the top of the fixed seat (6), and the top of the sliding seat (8) passes through the second sliding hole (13) and is flush with the top of the fixed seat (6); The top of the sliding seat (8) is provided with a first mounting slot (10), the interior of the first mounting slot (10) is slidably connected to a support seat (14), and the top of the support seat (14) extends upwards, and third guide rods (32) are slidably embedded in the four corners of the bottom of the support seat (14), the bottom ends of the four third guide rods (32) extend downwards and are fixedly connected to the bottom wall of the first mounting slot (10), and the outer walls of the four third guide rods (32) are sleeved with third springs (33), and the two ends of the third springs (33) are respectively fixedly connected to the bottom wall of the first mounting slot (10) and the bottom of the support seat (14).

2. A device for welding longitudinal seams of steel pipes as claimed in claim 1, characterized in that: A second mounting notch (15) is provided at the top of the support seat (14), a rotating rod (16) is connected to the inside of the second mounting notch (15) in a transversely rotatable manner, two rotating blocks (18) are symmetrically fixedly sleeved on the outer wall of the rotating rod (16), and the tops of the two rotating blocks (18) are flush with the top of the support seat (14), and a driving member for driving the two rotating blocks (18) to rotate simultaneously is provided inside the support seat (14).

3. A device for welding longitudinal seams of steel pipes as claimed in claim 2, characterized in that: The driving member comprises a mounting cavity (19) opened inside the support seat (14), two second guide rods (25) are symmetrically fixedly connected inside the mounting cavity (19), the outer walls of the two second guide rods (25) are slidably sleeved with the same vertical plate (22), the outer walls of the two second guide rods (25) are symmetrically sleeved with two second springs (26), and the two ends of the second springs (26) are respectively fixedly connected to one side of the vertical plate (22) and the inner wall of the mounting cavity (19); The bottom wall of the second mounting notch (15) is provided with a third sliding hole (24) which is in communication with the mounting cavity (19); the top end of the vertical plate (22) passes through the third sliding hole (24) and is fixedly connected to a rack (23); the outer wall of the rotating rod (16) is fixedly sleeved with a gear (17) located between the two rotating blocks (18), and the gear (17) is meshed with the rack (23).

4. A device for welding longitudinal seams of steel pipes as claimed in claim 3, characterized in that: The bottom wall of the installation cavity (19) is slidably connected to a first slider (20), and the bottom end of the vertical plate (22) is fixedly connected to the top of the first slider (20). The first slider (20) is fixedly connected to a stopper (21) on one side away from the other. The two stoppers (21) extend to the outside of the support seat (14) and intermittently contact and cooperate with the inner walls of both sides of the second slide hole (13).

5. A device for welding longitudinal seams of steel pipes as claimed in claim 4, characterized in that: The bottom of the first sliding block (20) is provided with three sliding grooves (27) arranged side by side and equidistantly, the interiors of the three sliding grooves (27) are all slidably connected with a clamping rod (28), the top ends of the three clamping rods (28) are all fixedly connected with the top walls of the corresponding sliding grooves (27) by a same compression spring (29), the bottom wall of the installation cavity (19) is symmetrically provided with two clamping holes (30) for use with the clamping rods (28), and the bottom wall of the first installation slot (10) is symmetrically fixedly connected with two top rods (31) for use with the clamping holes (30) corresponding to the clamping holes (30).

6. A device for welding longitudinal seams of steel pipes as claimed in claim 1, characterized in that: The positioning mechanism comprises a sliding plate (34) slidably connected to one side of the top of the operating table (1); a lead screw motor (35) is fixedly connected to one side of the top of the operating table (1); a lead screw (36) is fixedly connected to the output shaft of the lead screw motor (35); the lead screw (36) is threadedly passed through one side of the sliding plate (34); a fixed block (41) is fixedly connected to the top of the operating table (1); and one end of the lead screw (36) away from the lead screw motor (35) is rotatably connected to one side of the fixed block (41).

7. A device for welding longitudinal seams of steel pipes as claimed in claim 6, characterized in that: A fourth sliding hole (39) is provided on one side of the sliding plate (34), and a second sliding block (40) is slidably penetrated in the fourth sliding hole (39); an electric push rod (38) is fixedly connected to a side of the sliding plate (34) away from the gantry (4); an output end of the electric push rod (38) is fixedly connected to a top side of the second sliding block (40); a side of the second sliding block (40) close to the gantry (4) is rotatably connected to a rotating shaft (43); the other end of the rotating shaft (43) is fixedly connected to a connecting block (44); an adjusting screw (45) is threadedly penetrated through the top of the connecting block (44); and a curved pressing block (46) is rotatably connected to the bottom end of the adjusting screw (45).

8. A device for welding longitudinal seams of steel pipes as claimed in claim 7, characterized in that: An infrared transmitter (37) is fixedly connected to the top of a side of the sliding plate (34) away from the electric push rod (38); an infrared receiver (42) located directly below the infrared transmitter (37) is fixedly connected to one side of the sliding plate (34), and the infrared receiver (42) is used in conjunction with the infrared transmitter (37); a support block (47) is fixedly connected to one side of the arc-shaped pressing block (46); and a support rod (48) intermittently used in conjunction with the infrared receiver (42) is fixedly connected to the side of the support block (47) away from the arc-shaped pressing block (46).

Images