Ring welding device for steel pipe

Abstract

The utility model relates to the technical field of steel pipe machining devices, and discloses a ring welding device for steel pipes, which comprises two supports, placing frames are fixedly mounted at the left ends of the two supports, and transverse frames are fixedly mounted on the right sides of the top ends of the two supports; the welding mechanism is arranged at the front end of the bracket; and the driving mechanism is arranged outside the bracket. By arranging the rectangular block, the welder, the spring, the turntable and the connecting rod, after the driving motor is started, the driving shaft drives the turntable and one end of the connecting rod to rotate, so that the other end of the connecting rod generates a pulling force on the fixed rod, and the fixed rod is pulled to drive the rectangular block and the welder to move; and due to the existence of the spring, the contact state of the welding device and the steel pipe can be kept, and therefore automatic ring welding operation can be conducted on the steel pipe along with rotation of the steel pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe processing devices, and more specifically, the utility model relates to a circumferential welding device for steel pipes. Background Art

[0002] Steel pipes refer to steel materials with hollow cross-sections, and their lengths are much greater than their diameters or circumferences. They are divided into circular, square, rectangular, and special-shaped steel pipes according to the cross-sectional shape; carbon structural steel pipes, low-alloy structural steel pipes, alloy steel pipes, and composite steel pipes according to the material; steel pipes for conveying pipelines, engineering structures, and mechanical manufacturing according to the use; seamless steel pipes and welded steel pipes according to the production process. Steel pipes are not only used for conveying fluids and powdered solids and exchanging heat energy, but also an economical steel material.

[0003] During the process of processing steel pipes, sometimes it is necessary to weld a short steel pipe with a bayonet at one end of a long steel pipe. In the traditional circumferential welding method, most often the steel pipe is rotated at a constant speed through a device, and then the operator holds the welding head by hand to circumferentially weld the short steel pipe and the long steel pipe that have been pre-positioned and spot-welded. However, this method has high technical requirements for the operator, and the way of holding the welding head by hand also requires the operator to do a good job in protection during welding. It has high limitations and is cumbersome to operate. Therefore, it needs to be improved. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a circumferential welding device for steel pipes, which has the advantage of automatically performing circumferential welding.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: A circumferential welding device for steel pipes, comprising:

[0006] Supports, the number of the supports is two, and placing frames are fixedly installed at the left ends of the two supports, and cross frames are fixedly installed at the right sides of the tops of the two supports;

[0007] Welding mechanism, the welding mechanism is arranged at the front end of the support;

[0008] Driving mechanism, the driving mechanism is arranged outside the support;

[0009] Among them, the welding mechanism includes a fixing frame, the fixing frame is fixedly installed on the right side of the front end of the bracket, a rectangular block is movably sleeved on the right side of the top of the fixing frame, limiting grooves are respectively opened on the right sides of the upper and lower inner walls of the rectangular block, a limiting block is movably sleeved at the left end inside the limiting groove, the number of the limiting blocks is two, a welding device is fixedly installed between the two limiting blocks, the outer surface of the welding device is movably sleeved with the inner surface of the rectangular block, a spring is fixedly installed at the right end of the welding device, the other end of the spring is fixedly installed at the right end inside the rectangular block, and the rectangular block will drive the welding device to move.

[0010] As a preferred technical solution of the present invention, the driving mechanism includes:

[0011] A driving motor, the driving motor is fixedly installed in the middle of the inner top of the fixing frame, the other end of the output shaft of the driving motor is fixedly sleeved with a driving shaft, and a turntable is fixedly sleeved on the outer surface of the driving shaft;

[0012] A connecting rod, the connecting rod is hinged to the right side of the bottom end of the turntable, the other end of the connecting rod is hinged to a fixing rod, and the other end of the fixing rod is fixedly connected to the middle of the right end of the rectangular block.

[0013] As a preferred technical solution of the present invention, first fixing blocks are respectively fixedly installed at the tops of the front ends of the two brackets, a first round rod is movably sleeved inside the first fixing block, a first roller is fixedly sleeved on the outer surface of the first round rod, and the outer surface of the first roller is movably connected to the outer surface of the first fixing block.

[0014] As a preferred technical solution of the present invention, second fixing blocks are respectively fixedly installed at the bottoms of the front ends of the two brackets, a second round rod is movably sleeved inside the second fixing block, a second roller is fixedly sleeved on the right side of the outer surface of the second round rod, and a driven wheel is fixedly sleeved on the left side of the outer surface of the second round rod.

[0015] As a preferred technical solution of the present invention, first motors are respectively fixedly installed at the bottoms of the rear ends inside the two brackets, the other end of the output shaft of the first motor is fixedly sleeved with a rotating shaft, a driving wheel is fixedly sleeved on the outer surface of the rotating shaft, and the driving wheel is in transmission connection with the driven wheel through a transmission chain.

[0016] As a preferred technical solution of the present invention, a baffle is fixedly installed on the outer surface of the fixing frame in front of the bracket, sliders are respectively movably sleeved at the adjacent ends inside the upper and lower ends of the baffle, the number of the sliders is two, positioning rings are respectively fixedly installed on the right sides of the opposite surfaces of the two sliders, the number of the positioning rings is two, the shapes and sizes of the two positioning rings are the same, and the opposite surfaces of the two positioning rings are movably connected.

[0017] As a preferred technical solution of the present utility model, a second motor is fixedly installed at the top of the rear end of the baffle. The other end of the output shaft of the second motor is fixedly sleeved with a threaded rod. The rear side of the outer surface of the threaded rod is threadedly sleeved with a movable block. The right end of the movable block is movably connected to the left end of the baffle. The upper and lower ends of the movable block are respectively hinged with connecting rods. The number of the connecting rods is two. The other ends of the two connecting rods are respectively hinged to the left sides of the opposite surfaces of the two sliders. The movable block will cause the sliders to move.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] 1. By setting a rectangular block, a welding device, a spring, a turntable and a connecting rod in the present utility model, when the driving motor is started, the driving shaft will drive the turntable and one end of the connecting rod to rotate, so that the other end of the connecting rod generates a pulling force on the fixed rod, pulling the fixed rod to drive the rectangular block and the welding device to move, so that the welding device is tightly attached to the steel pipe. The existence of the spring can maintain the contact state between the welding device and the steel pipe, and thus the automatic circumferential welding operation can be carried out on the steel pipe as it rotates.

[0020] 2. By setting sliders, positioning rings, a second motor, a movable block and connecting rods in the present utility model, when the second motor is started, the threaded rod will rotate. Since the inner surface of the movable block is threadedly sleeved with the outer surface of the threaded rod, as the threaded rod rotates, the movable block will drive one end of the connecting rod to move, so that the other end of the connecting rod generates a pushing force on the slider, pushing the slider to drive the positioning ring to move. When the two positioning rings are mutually attached, the positioning of the steel pipe can be realized. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of the present utility model;

[0022] Figure 2 is a schematic structural diagram of the side of the present utility model;

[0023] Figure 3 is a schematic cross-sectional structural diagram of the top of the present utility model;

[0024] Figure 4 is a schematic cross-sectional structural diagram of the fixing frame of the present utility model;

[0025] Figure 5 is a schematic cross-sectional structural diagram of the baffle of the present utility model;

[0026] Figure 6 is Figure 4 a partial enlarged structural diagram of the A position in

[0027] In the figure: 1, support; 2, placement rack; 3, horizontal rack; 4, welding mechanism; 401, fixing rack; 402, rectangular block; 403, limiting groove; 404, limiting block; 405, welder; 406, spring; 5, driving mechanism; 501, driving motor; 502, driving shaft; 503, turntable; 504, connecting rod; 505, fixing rod; 6, first fixing block; 7, first round rod; 8, first roller; 9, second fixing block; 10, second round rod; 11, second roller; 12, driven wheel; 13, first motor; 14, rotating shaft; 15, driving wheel; 16, transmission chain; 17, baffle; 18, slider; 19, positioning ring; 20, second motor; 21, threaded rod; 22, movable block; 23, connecting rod. Specific implementation manner

[0028] 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.

[0029] As Figures 1 to 6 shown, the present invention provides a ring welding device for steel pipes, including:

[0030] The supports 1, the number of the supports 1 is two, the left ends of the two supports 1 are fixedly installed with the placement racks 2, and the right sides of the tops of the two supports 1 are fixedly installed with the horizontal racks 3;

[0031] The welding mechanism 4 is arranged at the front end of the support 1;

[0032] The driving mechanism 5 is arranged outside the support 1;

[0033] Among them, the welding mechanism 4 includes a fixing rack 401, the fixing rack 401 is fixedly installed on the right side of the front end of the support 1, the right side of the top of the fixing rack 401 is movably sleeved with a rectangular block 402, the right sides of the upper and lower inner walls of the rectangular block 402 are respectively provided with limiting grooves 403, the left ends of the limiting grooves 403 are movably sleeved with limiting blocks 404, the number of the limiting blocks 404 is two, a welder 405 is fixedly installed between the two limiting blocks 404, the outer surface of the welder 405 is movably sleeved with the inner surface of the rectangular block 402, a spring 406 is fixedly installed at the right end of the welder 405, and the other end of the spring 406 is fixedly installed at the right end inside the rectangular block 402, and the rectangular block 402 will drive the welder 405 to move.

[0034] When the rectangular block 402 is pushed, it will drive the welder 405 to move leftward along the top of the fixing frame 401 until the welder 405 is in close contact with the steel pipe. At this time, the spring 406 will be compressed and contracted. When the welder 405 contacts the spot welding position on the steel pipe, the welder 405 will move rightward to further compress the spring 406. Under the restoring action of the spring 406, the welder 405 will return to its original position after passing through the spot welding position, so as to ensure that the welder 405 and the steel pipe always remain in contact. As the steel pipe rotates, the automatic circumferential welding operation of the steel pipe can be realized.

[0035] Among them, the driving mechanism 5 includes:

[0036] A driving motor 501, which is fixedly installed in the middle of the inner top of the fixing frame 401. The other end of the output shaft of the driving motor 501 is fixedly sleeved with a driving shaft 502, and the outer surface of the driving shaft 502 is fixedly sleeved with a turntable 503;

[0037] A connecting rod 504, which is hinged to the right side of the bottom end of the turntable 503. The other end of the connecting rod 504 is hinged with a fixing rod 505, and the other end of the fixing rod 505 is fixedly connected to the middle of the right end of the rectangular block 402.

[0038] When the driving motor 501 is started, it will cause the driving shaft 502 to drive the turntable 503 to rotate, so that one end of the connecting rod 504 rotates together, and then the other end of the connecting rod 504 generates a pulling force on the fixing rod 505, pulling the fixing rod 505 to drive the rectangular block 402 to move.

[0039] Among them, first fixing blocks 6 are respectively fixedly installed at the top of the front ends of the two brackets 1. A first round rod 7 is movably sleeved inside the first fixing block 6. A first roller 8 is fixedly sleeved on the outer surface of the first round rod 7, and the outer surface of the first roller 8 is movably connected to the outer surface of the first fixing block 6.

[0040] The existence of the first fixing block 6, the first round rod 7 and the first roller 8 will play a role in supporting the steel pipe.

[0041] Among them, second fixing blocks 9 are respectively fixedly installed at the bottom of the front ends of the two brackets 1. A second round rod 10 is movably sleeved inside the second fixing block 9. A second roller 11 is fixedly sleeved on the right side of the outer surface of the second round rod 10, and a driven wheel 12 is fixedly sleeved on the left side of the outer surface of the second round rod 10.

[0042] When the driven wheel 12 rotates, it will drive the second roller 11 to rotate through the second round rod 10. The outer surface of the second roller 11 is rough, so as the second roller 11 rotates, the steel pipe will rotate.

[0043] Among them, first motors 13 are respectively and fixedly installed at the bottoms of the inner rear ends of the two brackets 1. The other ends of the output shafts of the first motors 13 are fixedly sleeved with rotating shafts 14. The outer surfaces of the rotating shafts 14 are fixedly sleeved with driving wheels 15. The driving wheels 15 are in transmission connection with driven wheels 12 through transmission chains 16.

[0044] After the first motors 13 are started, the rotating shafts 14 will drive the driving wheels 15 to rotate. Since the driving wheels 15 are in transmission connection with the driven wheels 12 through the transmission chains 16, the driven wheels 12 will rotate.

[0045] Among them, baffles 17 located in front of the brackets 1 are fixedly installed on the outer surfaces of the fixing frames 401. The similar ends inside the upper and lower ends of the baffles 17 are respectively movably sleeved with sliders 18. The number of the sliders 18 is two. The right sides of the opposite surfaces of the two sliders 18 are respectively fixedly installed with positioning rings 19. The number of the positioning rings 19 is two. The shapes and sizes of the two positioning rings 19 are the same. The opposite surfaces of the two positioning rings 19 are movably connected.

[0046] The inner surfaces of the two positioning rings 19 are smooth, so that while positioning the steel pipe, it will not prevent the rotation of the steel pipe.

[0047] Among them, a second motor 20 is fixedly installed at the top of the rear end of the baffle 17. The other end of the output shaft of the second motor 20 is fixedly sleeved with a threaded rod 21. The rear side of the outer surface of the threaded rod 21 is threadedly sleeved with a movable block 22. The right end of the movable block 22 is movably connected to the left end of the baffle 17. The upper and lower ends of the movable block 22 are respectively hinged with connecting rods 23. The number of the connecting rods 23 is two. The other ends of the two connecting rods 23 are respectively hinged to the left sides of the opposite surfaces of the two sliders 18. The movable block 22 will cause the sliders 18 to move.

[0048] After the second motor 20 is started, the threaded rod 21 will rotate, so that the movable block 22 will drive the connecting rods 23 to move under the action of the threaded rod 21, and then the other ends of the connecting rods 23 will generate a thrust on the sliders 18 to push the sliders 18 to move.

[0049] The working principle and usage process of the utility model:

[0050] First, the operator spot welds the short steel pipe and the long steel pipe with the bayonet into position, and the short steel pipe and the long steel pipe will be connected together. Then the operator places it between the first roller 8 and the second roller 11 and makes one end of the short steel pipe fit with the baffle 17. Then the operator starts the second motor 20 to rotate the threaded rod 21, so that the movable block 22 threadedly connected to the threaded rod 21 moves with one end of the connecting rod 23, and then the other end of the connecting rod 23 generates a pulling force on the slider 18, pulling the two sliders 18 to move with the two positioning rings 19 respectively until the two positioning rings 19 are in contact. Since the inner surfaces of the two positioning rings 19 are smooth and have the same size as the bayonet of the short steel pipe, the steel pipe can be positioned by moving the positioning ring 19 without hindering the rotation of the steel pipe.

[0051] Then the operator starts the first motor 13, so that the rotating shaft 14 drives the driving wheel 15 to rotate, and the driving wheel 15 is connected to the driven wheel 12 through the transmission chain 16, so the driven wheel 12 will drive the second round rod 10 and the second roller 11 to rotate along the inner surface of the second fixed block 9, so that the steel pipe in contact with the outer surface of the second roller 11 rotates, and then the operator starts the driving motor 501, so that the driving shaft 502 drives the turntable 503 to rotate, so that the connecting rod 504 hinged to the turntable 503 rotates together, and then the other end of the connecting rod 504 generates a pulling force on the fixing rod 505, pulling the fixing rod 505 to move with the rectangular block 402 and the welder 405 until the welding point of the short steel pipe and the long steel pipe of the welder 405 is tightly fitted, and the presence of the spring 406 can ensure that the welder 405 and the welding point are always in contact, and the automatic ring welding operation of the steel pipe can be completed as the steel pipe rotates.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ring welding device for a steel pipe, characterized in that: Included are: Brackets (1), the number of the brackets (1) being two, the left ends of the two brackets (1) being fixedly mounted with a placement rack (2), and the right sides of the top ends of the two brackets (1) being fixedly mounted with a cross rack (3); A welding mechanism (4), wherein the welding mechanism (4) is arranged at the front end of the bracket (1); A driving mechanism (5), wherein the driving mechanism (5) is arranged outside the bracket (1); The welding mechanism (4) comprises a fixing frame (401), wherein the fixing frame (401) is fixedly mounted on the right side of the front end of the bracket (1), and a rectangular block (402) is movably sleeved on the right side of the top end of the fixing frame (401), and limiting grooves (403) are respectively provided on the right sides of the upper and lower inner walls of the rectangular block (402), and a limiting block (404) is movably sleeved on the left end of the limiting groove (403), and the number of the limiting blocks (404) is two, and a welder (405) is fixedly mounted between the two limiting blocks (404), and the outer surface of the welder (405) is movably sleeved on the inner surface of the rectangular block (402), and a spring (406) is fixedly mounted on the right end of the welder (405), and the other end of the spring (406) is fixedly mounted on the right end of the rectangular block (402), and the rectangular block (402) drives the welder (405) to move.

2. A ring welding device for steel pipes according to claim 1, characterized in that: The driving mechanism (5) comprises: A driving motor (501), the driving motor (501) being fixedly mounted in the middle of the top end of the fixing frame (401), the other end of the output shaft of the driving motor (501) being fixedly sleeved with a driving shaft (502), and the outer surface of the driving shaft (502) being fixedly sleeved with a rotating disk (503); A connecting rod (504) is hinged on the right side of the bottom end of the rotating disk (503), and the other end of the connecting rod (504) is hinged with a fixing rod (505), and the other end of the fixing rod (505) is fixedly connected to the middle part of the right end of the rectangular block (402).

3. A ring welding device for steel pipe according to claim 1, characterized in that: A first fixing block (6) is fixedly mounted on the top of the front end of each of the two brackets (1), a first round rod (7) is movably sleeved inside the first fixing block (6), a first roller (8) is fixedly sleeved on the outer surface of the first round rod (7), and the outer surface of the first roller (8) is movably connected to the outer surface of the first fixing block (6).

4. A ring welding device for steel pipe according to claim 1, characterized in that: A second fixed block (9) is fixedly mounted at the bottom of the front end of each of the two brackets (1), a second round rod (10) is movably sleeved inside the second fixed block (9), a second roller (11) is fixedly sleeved on the right side of the outer surface of the second round rod (10), and a driven wheel (12) is fixedly sleeved on the left side of the outer surface of the second round rod (10).

5. A ring welding device for steel pipes according to claim 1, characterized in that: A first motor (13) is fixedly mounted at the bottom of the rear ends of the two brackets (1), a rotating shaft (14) is fixedly sleeved on the other end of the output shaft of the first motor (13), a driving wheel (15) is fixedly sleeved on the outer surface of the rotating shaft (14), and the driving wheel (15) is connected to the driven wheel (12) through a transmission chain (16).

6. A ring welding device for steel pipes according to claim 1, characterized in that: A baffle (17) located in front of the bracket (1) is fixedly mounted on the outer surface of the fixing frame (401), and sliders (18) are movably sleeved at the adjacent ends inside the upper and lower ends of the baffle (17), and there are two sliders (18). Positioning rings (19) are fixedly mounted on the right sides of the opposite surfaces of the two sliders (18), and there are two positioning rings (19). The two positioning rings (19) have the same shape and size, and the opposite surfaces of the two positioning rings (19) are movably connected.

7. A ring welding device for steel pipes according to claim 6, characterized in that: A second motor (20) is fixedly mounted on the top of the rear end of the baffle (17); a threaded rod (21) is fixedly sleeved on the other end of the output shaft of the second motor (20); a movable block (22) is threadedly sleeved on the rear side of the outer surface of the threaded rod (21); the right end of the movable block (22) is movably connected to the left end of the baffle (17); the upper and lower ends of the movable block (22) are respectively hinged with connecting rods (23); there are two connecting rods (23); the other ends of the two connecting rods (23) are respectively hinged to the left sides of the opposite surfaces of the two sliders (18); the movable block (22) causes the sliders (18) to move.

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