A welding device for butt-jointing metal pipe ends

Abstract

The invention discloses a welding device for butting the ends of metal pipes. The invention relates to the technical field of metal pipe welding, comprising an arc file, which is used for grinding and smoothing the butting portion of the end face of the metal pipe. A rectangular rotating plate is arranged on one side of the arc file; a curved connecting plate, a reset spring is arranged on the inner side of the curved connecting plate, one side of the arc file is fixedly connected to one side of the rectangular rotating plate, and one side of the rectangular rotating plate is rotatably connected to the inner side of the curved connecting plate through a rotating bolt. The welding device for butting the ends of metal pipes uses the arc file to grind and smooth the end face of the metal pipe when the metal pipe rotates, so as to prevent the uneven and smooth end face of the metal pipe from having many impurities and causing defects such as pores and slag inclusions during welding. When the metal pipe rotates, the arc steel brush rubs and cleans the end face of the metal pipe, so as to prevent a large amount of ground iron filings from remaining at the butt joint of the end face of the metal pipe and still adhering to it, affecting the welding quality.

Description

Technical Field

[0001] The invention relates to the technical field of metal pipe welding, and in particular to a welding device for butting metal pipe ends. Background Art

[0002] Metal pipe is a tubular object made of metal material, with good strength and rigidity, excellent thermal and electrical conductivity and good corrosion resistance. Common metal pipe materials are: steel pipe, including seamless steel pipe and welded steel pipe, widely used in construction, machinery manufacturing, petrochemical and other fields; copper pipe, with good thermal conductivity and corrosion resistance; aluminum pipe, light weight and high strength; plays an important role in modern industry and life, and its performance and application depend on the material, manufacturing process and specific use environment. Metal pipe butt welding is a method of connecting the ends of two sections of metal pipes together through welding process. Common welding methods include manual arc welding, argon arc welding and gas shielded welding. The quality of metal pipe butt welding is directly related to the safety and reliability of the pipeline system.

[0003] When butt welding the ends of metal pipes, it is particularly important to ensure the smoothness of the end faces of the metal pipes to ensure the quality of the butt welding. When there are many impurities on the end faces of the metal pipes, defects such as pores and slag inclusions will occur during the welding process. Therefore, we propose a welding device for butt welding of metal pipe ends. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a welding device for butting ends of metal pipes, comprising:

[0005] An annular plate 1, wherein a welder is disposed on the inner side of the annular plate 1;

[0006] An electric slide rail, which is used to adjust the distance between the metal pipe and the welder, and a concave connecting plate is provided on the top of the electric slide rail;

[0007] An electric motor, wherein an annular sleeve plate 1 is arranged on the outer side of the electric motor;

[0008] A three-rod side frame, wherein an annular sleeve plate 2 is arranged on the outer side of the three-rod side frame;

[0009] A grinding device is used to flatten, grind and clean the end surface of the metal pipe to prevent the uneven and smooth end surface of the metal pipe from containing a lot of impurities, which may cause defects such as pores and slag inclusions during welding;

[0010] An inner clamping device, which is used to clamp and fix metal pipes of different sizes in an inner push manner, so as to prevent the equipment from having difficulty in adapting and welding metal pipes of different sizes;

[0011] A cleaning device is used to clean and discharge the debris on the inner wall of the metal pipe to prevent the presence of impurities such as oil stains near the butt joint of the inner walls of the two metal pipes from affecting the welding quality during processing;

[0012] The inner side of the annular plate one is fixedly connected to one end of the welding device, the top of the electric slide rail is slidably connected to the bottom of the concave connecting plate, the top of the concave connecting plate is fixedly connected to the outer side of the annular sleeve plate one, a set of the annular sleeve plate is arranged on the outer side of the motor and is fixedly connected to the motor, an end of the concave connecting plate away from the annular sleeve plate one is fixedly connected to the outer side of the annular sleeve plate two, the annular sleeve plate two is sleeved on the outer side of the three-rod side frame and is rotatably connected to the three-rod side frame, one side of the three-rod side frame is fixedly connected to the driving shaft of the motor, the side of the three-rod side frame away from the motor is fixedly connected to one side of the grinding device, the inner side of the three-rod side frame is fixedly connected to one side of the cleaning device, and the side of the annular plate one close to the inner clamping device is fixedly connected to one side of the grinding device;

[0013] Wherein, the grinding device comprises:

[0014] An arc file is used to grind and smooth the end surface of the metal pipe. When the metal pipe rotates, the arc file grinds and smoothes the end surface of the metal pipe to prevent the uneven and smooth end surface of the metal pipe from having many impurities, which may cause defects such as pores and slag inclusions during welding. A rectangular rotating plate is provided on one side of the arc file.

[0015] The curved connecting plate is provided with a return spring on the inner side of the curved connecting plate. The return spring is provided to drive the rectangular rotating plate to rotate to a vertical state and give a certain pulling force to the rectangular rotating plate, so as to prevent the rectangular rotating plate from being difficult to be in a vertical state and lacking pulling force, resulting in poor grinding effect of the arc file on the end face of the metal pipe;

[0016] One side of the arc file is fixedly connected to one side of the rectangular rotating plate, one side of the rectangular rotating plate is rotatably connected to the inner side of the curved connecting plate through a rotating bolt, the inner side of the curved connecting plate is fixedly connected to one end of a return spring, and one end of the return spring away from the curved connecting plate is fixedly connected to one side of the rectangular rotating plate close to the arc file;

[0017] One side of the curved connecting plate is fixedly connected to one side of the annular plate;

[0018] The outer side of the annular plate 1 is fixedly connected with a bottom connecting plate, and the bottom of the bottom connecting plate is fixedly connected with the top of the electric slide rail;

[0019] Both sides of the arc file are fixedly connected with arc steel brushes. When the metal pipe rotates, the arc steel brushes rub and clean the end face of the metal pipe to prevent a large amount of iron filings from remaining at the joint of the end face of the metal pipe and still adhering to affect the welding quality. The outer side of the arc file is fixedly connected with an arc baffle. The arc baffles arranged at the top and bottom of the arc file surround and cover the area around the arc file to prevent the iron filings from being splashed around when the metal pipe is rotated at a high speed and is difficult to handle, affecting the welding effect.

[0020] There are multiple arc-shaped steel brushes, and the multiple arc-shaped steel brushes are evenly distributed on both sides of the arc-shaped file. There are multiple arc-shaped baffles, and the multiple arc-shaped baffles are distributed on the outside of the arc-shaped file.

[0021] Furthermore, the inner clamping device includes an annular plate 2, the outer side of which is fixedly connected with a hydraulic push rod, the driving shaft of the hydraulic push rod is fixedly connected with an arc-shaped push plate, and the arc-shaped push plate is fixedly connected with a hollow air cushion on a side away from the hydraulic push rod. When the hollow air cushion is squeezed by the arc-shaped push plate, the side close to the grinding block pushes the metal pipe in a completely fitting manner to prevent the radius of the arc-shaped push plate from not matching when clamping and fixing metal pipes of different sizes, resulting in a small contact area and easy slipping. The hollow air cushion is fixedly connected with a grinding block on a side away from the arc-shaped push plate, and the friction force is increased by arranging a plurality of grinding blocks on one side of the hollow air cushion to directly contact the metal pipe, so as to prevent the small friction force when the metal pipe is clamped and fixed, which may cause easy slipping in subsequent operations. Exhaust circular holes are provided on both sides of the hollow air cushion, and the hollow air cushion is During squeezing, the internal gas is quickly discharged to the outside through the exhaust holes on both sides, preventing the hollow air cushion from being damaged by explosion due to excessive squeezing pressure on the internal gas when the hollow air cushion is completely attached to the metal tube. A semi-conical piece is fixedly connected to one side of the hollow air cushion close to the exhaust hole, and semi-conical pieces are arranged on both sides of the hollow air cushion close to the exhaust holes to surround and cover them, preventing the hollow air cushion from being connected to the outside when not squeezed, causing dust and other particulate impurities to continue to enter the interior and affect use. One side of the annular plate 2 is fixedly connected to one side of the three-rod side frame, a plurality of frosting blocks are provided, and the plurality of frosting blocks are evenly distributed on one side of the hollow air cushion, a plurality of exhaust holes are provided, and the plurality of exhaust holes are evenly distributed on both sides of the hollow air cushion, and a plurality of semi-conical pieces are provided, and the plurality of semi-conical pieces are evenly distributed on both sides of the hollow air cushion.

[0022] Furthermore, the cleaning device includes an electric push rod, a driving shaft of the electric push rod is fixedly connected to a small circular plate, the outer side of the small circular plate is sleeved and fixedly connected to an annular arc piece, the outer side of the annular arc piece is provided with an arc-shaped through hole, and a plurality of arc-shaped through holes are provided to facilitate the passage of oil and other debris, thereby preventing a large amount of cleaned oil and other debris from accumulating between the two arc-shaped scrapers and being difficult to be discharged in time and overflowing to the surrounding area, the outer side of the annular arc piece is fixedly connected to an arc-shaped scraper, and the arc-shaped scraper slides and scrapes the inner wall of the metal pipe when it moves, thereby preventing the presence of oil and other impurities on the inner wall of the metal pipe near the docking position, which affects the welding quality during processing, and the inner side of the annular arc piece is fixedly connected to a corrugated ring piece, and a corrugated ring piece is arranged on the inner side of the annular arc piece to contact the inner side of the annular arc piece The area is fully surrounded and covered to prevent a part of the oil and other debris overflowing from the arc-shaped through hole from being difficult to be taken out of the metal pipe and scattered everywhere. The drive shaft connection of the electric push rod is separated from the area where oil and other debris accumulate on the inner side of the annular arc piece by the corrugated ring piece to prevent the oil and other debris cleaned by the arc scraper from falling on the drive shaft connection of the electric push rod and accumulating and affecting its use. The end of the electric push rod away from the small circular plate is fixedly connected to the inner side of the three-rod side frame, the corrugated ring piece is sleeved on the drive shaft of the electric push rod and is slidably connected to the drive shaft of the electric push rod, a plurality of arc-shaped through holes are provided, and the plurality of arc-shaped through holes are evenly distributed on the outside of the annular arc piece, a plurality of arc-shaped scrapers are provided, and the plurality of arc-shaped scrapers are evenly distributed on the outside of the annular arc piece.

[0023] The present invention has the beneficial effects:

[0024] 1. The present invention uses an arc-shaped steel brush to rub and clean the end face of the metal pipe when the metal pipe rotates, so as to prevent a large amount of iron filings that have been ground off from remaining at the joint of the end face of the metal pipe and still attaching to affect the welding quality. A plurality of grinding blocks are arranged on one side of the hollow air cushion to directly contact the metal pipe to increase the friction force, so as to prevent the metal pipe from slipping in subsequent operations due to the small friction force when it is clamped and fixed. When the arc-shaped scraper moves, it slides and scrapes the inner wall of the metal pipe, so as to prevent the presence of impurities such as oil stains on the inner wall of the metal pipe near the joint position and affecting the welding quality during processing.

[0025] 2. The present invention provides a grinding device. When the metal tube rotates, the arc file grinds and smoothes the end face of the metal tube to prevent the uneven and smooth end face of the metal tube from containing many impurities, which may lead to defects such as pores and slag inclusions during welding. When the metal tube rotates, the arc steel brush rubs and cleans the end face of the metal tube to prevent a large amount of iron filings that have been ground off from remaining at the joint of the end face of the metal tube and still attaching to it, which may affect the welding quality. The arc baffles provided at the top and bottom of the arc file surround and cover the area around the arc file to prevent the iron filings that have been ground off from splashing around and being difficult to handle, which may affect the welding effect, and a reset spring is provided to drive the rectangular rotating plate to rotate to a vertical state and give the rectangular rotating plate a certain pulling force, so as to prevent the rectangular rotating plate from being difficult to be in a vertical state and lacking pulling force, which may lead to poor grinding effect of the arc file on the end face of the metal tube.

[0026] 3. The present invention increases the friction force by arranging an inner clamping device and arranging a plurality of frosting blocks on one side of the hollow air cushion to directly contact the metal tube, so as to prevent the metal tube from slipping easily in subsequent operations due to the small friction force when being clamped and fixed; when the hollow air cushion is squeezed by the arc-shaped push plate, the side close to the frosting block pushes the metal tube in a completely fitting manner, so as to prevent the small contact area and easy slipping when metal tubes of different sizes are clamped and fixed due to the mismatch of the radius of the arc-shaped push plate; when the hollow air cushion is squeezed, the gas inside is quickly discharged to the outside through the exhaust circular holes on both sides, so as to prevent the hollow air cushion from exploding and being damaged due to excessive extrusion pressure when the hollow air cushion is completely fitted with the metal tube; semi-conical sheets are arranged on both sides of the hollow air cushion near the exhaust circular holes to surround and cover the hollow air cushion, so as to prevent the hollow air cushion from being connected to the outside when not squeezed, so as to prevent dust and other particulate impurities from continuously entering the interior and affecting the use.

[0027] 4. The present invention provides a cleaning device, and the arc-shaped scraper blade slides and scrapes the inner wall of the metal pipe when it moves, so as to prevent the presence of impurities such as oil on the inner wall of the metal pipe near the docking position, which may affect the welding quality during processing; a plurality of arc-shaped through holes are provided to facilitate the passage of oil and other debris, so as to prevent a large amount of cleaned oil and other debris from accumulating between the two arc-shaped scrapers and being difficult to be discharged in time and overflowing to the surrounding areas; a corrugated ring sheet is provided on the inner side of the annular arc sheet to fully surround and cover the inner area of ​​the annular arc sheet, so as to prevent a part of the oil and other debris overflowing from the arc-shaped through hole from being difficult to be taken out of the metal pipe and scattered everywhere; the drive shaft connection of the electric push rod is separated from the area where oil and other debris accumulate on the inner side of the annular arc sheet by the corrugated ring sheet, so as to prevent the oil and other debris cleaned by the arc-shaped scraper from falling on the drive shaft connection of the electric push rod and accumulating and affecting its use. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the welding equipment of the present invention;

[0029] Figure 2This is a schematic diagram of the bottom structure of the welding equipment of the present invention;

[0030] Figure 3 It is a schematic diagram of the structure of the grinding device of the present invention;

[0031] Figure 4 This is an enlarged structural schematic diagram of the grinding device A of the present invention;

[0032] Figure 5 It is a schematic diagram of the side section structure of the inner clamping device of the present invention;

[0033] Figure 6 This is an enlarged structural diagram of the inner clamping device B of the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the cleaning device of the present invention;

[0035] Figure 8 It is a schematic diagram of the side section structure of the cleaning device of the present invention;

[0036] In the figure: 1, annular plate 1; 2, welding device; 3, electric slide rail; 4, concave connecting plate; 5, motor; 6, annular sleeve plate 1; 7, three-rod side frame; 8, annular sleeve plate 2; 9, grinding device; 10, inner clamping device; 11, cleaning device; 12, bottom connecting plate; 901, arc file; 902, rectangular rotating plate; 903, curved connecting plate; 904, reset spring; 905, arc steel brush; 906, arc file; 907, arc file; 908, arc file; 909, arc file; 910, arc file; 911, arc file; 912, arc file; 913, arc file; 914, arc file; 915, arc file; 916, arc file; 917, arc file; 918, arc file; 919, arc file; 920, arc file; 921, arc file; 922, arc file; 923, arc file; 924, arc file; 925, arc file; 926, arc file; 927, arc file; 928, arc file; 929, arc file; 930, arc file; 931, arc file; 932, arc file; 933, arc file; 934, arc file; 935, arc file; 936, arc file; 937, arc file; 938, arc file; 939, arc file; 940, arc file; 941, arc file; 942, arc file; 943, arc file; 944, arc file; 945, arc file; 946, arc file; 947, arc file; 948, arc file; 949, arc file; 950, arc file; 951, 06, arc-shaped baffle; 1001, annular plate 2; 1002, hydraulic push rod; 1003, arc-shaped push plate; 1004, hollow air cushion; 1005, frosting block; 1006, exhaust hole; 1007, semi-conical piece; 1101, electric push rod; 1102, small circular plate; 1103, annular arc piece; 1104, arc-shaped through hole; 1105, arc-shaped scraper; 1106, corrugated ring piece. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0038] For the first embodiment, please refer to Figure 1-Figure 4 The present invention is a welding device for butting ends of metal pipes, comprising:

[0039] An annular plate 1, a welder 2 is arranged on the inner side of the annular plate 1;

[0040] An electric slide rail 3, which is used to adjust the distance between the metal pipe and the welder 2, and a concave connecting plate 4 is provided on the top of the electric slide rail 3;

[0041] The motor 5, the outer side of the motor 5 is provided with an annular sleeve plate 6;

[0042] A three-rod side frame 7, an annular sleeve plate 2 8 is arranged on the outer side of the three-rod side frame 7;

[0043] A grinding device 9, which is used to flatten, grind and clean the end surface of the metal pipe;

[0044] An inner clamping device 10, which is used to perform inner push-type clamping and fixing of metal pipes of different sizes;

[0045] A cleaning device 11, which is used to clean and discharge debris on the inner wall of the metal pipe;

[0046] The inner side of the annular plate 1 is fixedly connected to one end of the welder 2, the top of the electric slide rail 3 is slidably connected to the bottom of the concave connecting plate 4, the top of the concave connecting plate 4 is fixedly connected to the outer side of the annular sleeve plate 6, the annular sleeve plate 6 is sleeved on the outer side of the motor 5 and fixedly connected to the motor 5, the end of the concave connecting plate 4 away from the annular sleeve plate 6 is fixedly connected to the outer side of the annular sleeve plate 28, the annular sleeve plate 28 is sleeved on the outer side of the three-rod side frame 7 and rotatably connected to the three-rod side frame 7, one side of the three-rod side frame 7 is fixedly connected to the driving shaft of the motor 5, the side of the three-rod side frame 7 away from the motor 5 is fixedly connected to one side of the grinding device 9, the inner side of the three-rod side frame 7 is fixedly connected to one side of the cleaning device 11, and the side of the annular plate 1 close to the inner clamping device 10 is fixedly connected to one side of the grinding device 9;

[0047] Wherein, the grinding device 9 comprises:

[0048] An arc file 901, which is used to grind and smooth the end surface of the metal pipe. A rectangular rotating plate 902 is provided on one side of the arc file 901;

[0049] A curved connecting plate 903, a return spring 904 is disposed on the inner side of the curved connecting plate 903;

[0050] One side of the arc file 901 is fixedly connected to one side of the rectangular rotating plate 902, one side of the rectangular rotating plate 902 is rotatably connected to the inner side of the curved connecting plate 903 through a rotating bolt, the inner side of the curved connecting plate 903 is fixedly connected to one end of a return spring 904, and one end of the return spring 904 away from the curved connecting plate 903 is fixedly connected to one side of the rectangular rotating plate 902 close to the arc file 901;

[0051] One side of the curved connecting plate 903 is fixedly connected to one side of the annular plate 1;

[0052] The outer side of the annular plate 1 is fixedly connected with a bottom connecting plate 12, and the bottom of the bottom connecting plate 12 is fixedly connected with the top of the electric slide rail 3;

[0053] Both sides of the arc file 901 are fixedly connected with arc steel brushes 905, and the outer side of the arc file 901 is fixedly connected with an arc blocking piece 906;

[0054] There are multiple arc-shaped steel brushes 905, and the multiple arc-shaped steel brushes 905 are evenly distributed on both sides of the arc-shaped file 901. There are multiple arc-shaped baffles 906, and the multiple arc-shaped baffles 906 are distributed on the outside of the arc-shaped file 901. When in use, the electric slide rail 3 drives the concave connecting plate 4 to move in the direction away from the annular plate 1, and the movement of the concave connecting plate 4 drives the top annular sleeve plate 1 6 and the annular sleeve plate 2 8 to move together. When the annular sleeve plate 1 6 moves, it drives the motor 5 to move. When the motor 5 moves, it drives the three-rod side frame 7 at one end to move. The movement of the three-rod side frame 7 drives the inner clamping device 10 and the cleaning device 11 to move together. After the inner clamping device 10 moves to a certain distance from the annular plate 1, the metal pipe to be welded is inserted into the inner clamping device 10 and wrap the cleaning device 11 inside. At this time, the metal tube is clamped and fixed by the inner clamping device 10, and the impurities on the inner wall of the metal tube are cleaned and discharged by the cleaning device 11. Then, the fixed metal tube can be driven to move toward the annular plate 1 direction by the electric slide rail 3 again. When the metal tube moves, the end face gradually approaches the grinding device 9 and contacts the grinding device 9. At this time, the motor 5 is started to drive the three-rod side frame 7 to rotate. When the three-rod side frame 7 rotates, the metal tube is driven to rotate through the inner clamping device 10. At this time, the grinding device 9 grinds the end face of the rotating metal tube. After the end face of the metal tube is ground, the metal tube can continue to be driven by the electric slide rail 3 to move toward the annular plate 1 direction until the end faces of the two metal tubes are in contact and docked. At this time, the motor 5 is started again to drive the two metal tubes to rotate synchronously, and the end faces of the two metal tubes are welded by the welder 2. The metal tube moves toward the direction of the annular plate 1 until it contacts the arc file 901 and stops. At this time, the motor 5 is started to drive the metal tube to rotate through the inner clamping device 10. When the metal tube rotates, the arc file 901 grinds and smoothes the end face of the metal tube. At the same time, when the metal tube rotates, the arc steel brushes 905 on both sides of the arc file 901 also contact the end face of the metal tube. When the metal tube rotates, the arc steel brushes 905 rub and clean the end face of the metal tube. The arc blocking pieces 906 arranged at the top and bottom of the arc file 901 surround and cover the area around the arc file 901, and the end face of the metal tube is smooth. After the grinding is completed, the electric slide rail 3 can continue to drive the metal tube to move in the direction of the annular plate 1. When the metal tube moves, it pushes the arc file 901 to drive the rectangular rotating plate 902 to rotate obliquely in the direction of the annular plate 1. When the rectangular rotating plate 902 rotates, the reset spring 904 is stretched until the metal tube passes through the rectangular rotating plate 902. At this time, the rectangular rotating plate 902 rotates to contact the outer surface of the metal tube. When the metal tube is welded and taken out from the inner clamping device 10, the rectangular rotating plate 902 loses the thrust of the metal tube, and the reset spring 904 drives the rectangular rotating plate 902 to rotate in the direction of the inner clamping device 10 through the retraction force. By setting the reset spring 904, the rectangular rotating plate 902 is driven to rotate to a vertical state and a certain pulling force is given to the rectangular rotating plate 902.

[0055] For the second embodiment, please refer to Figure 1-Figure 8 The present invention provides a welding device for butting the ends of metal pipes: the inner clamping device 10 comprises an annular plate 1001, the outer side of the annular plate 1001 is fixedly connected with a hydraulic push rod 1002, the driving shaft of the hydraulic push rod 1002 is fixedly connected with an arc-shaped push plate 1003, the side of the arc-shaped push plate 1003 away from the hydraulic push rod 1002 is fixedly connected with a hollow air cushion 1004, the side of the hollow air cushion 1004 away from the arc-shaped push plate 1003 is fixedly connected with a grinding block 1005, and both sides of the hollow air cushion 1004 are provided with exhaust circular holes 1006 , a semi-conical piece 1007 is fixedly connected to one side of the hollow air cushion 1004 near the exhaust circular hole 1006, one side of the annular plate 1001 is fixedly connected to one side of the three-rod side frame 7, a plurality of frosting blocks 1005 are provided, and the plurality of frosting blocks 1005 are evenly distributed on one side of the hollow air cushion 1004, a plurality of exhaust circular holes 1006 are provided, and the plurality of exhaust circular holes 1006 are evenly distributed on both sides of the hollow air cushion 1004, a plurality of semi-conical pieces 1007 are provided, and the plurality of semi-conical pieces 1007 are evenly distributed on both sides of the hollow air cushion 1004;

[0056] The cleaning device 11 includes an electric push rod 1101, a small circular plate 1102 is fixedly connected to the driving shaft of the electric push rod 1101, an annular arc piece 1103 is sleeved and fixedly connected to the outer side of the small circular plate 1102, an arc-shaped through hole 1104 is opened on the outer side of the annular arc piece 1103, an arc-shaped scraper 1105 is fixedly connected to the outer side of the annular arc piece 1103, a corrugated ring piece 1106 is fixedly connected to the inner side of the annular arc piece 1103, one end of the electric push rod 1101 away from the small circular plate 1102 is fixedly connected to the inner side of the three-rod side frame 7, the corrugated ring piece 1106 is sleeved on the driving shaft of the electric push rod 1101 and is slidably connected to the driving shaft of the electric push rod 1101, a plurality of arc-shaped through holes 1104 are provided, and the plurality of arc-shaped through holes 1104 are all Evenly distributed on the outside of the annular arc sheet 1103, there are multiple arc scrapers 1105, and multiple arc scrapers 1105 are evenly distributed on the outside of the annular arc sheet 1103. When in use, before performing the metal pipe welding operation, first insert the metal pipe between the three hollow air cushions 1004 in the annular plate 1001 and pass it through the cleaning device 11 to wrap it inside. At this time, the hydraulic push rod 1002 pushes the arc push plate 1003 to move inside the annular plate 1001. When the arc push plate 1003 moves, it drives the hollow air cushion 1004 on one side to move together. The hollow air cushion 1004 gradually moves to the inside of the annular plate 1001 until the frosting block 1005 on the surface contacts the surface of the metal pipe, and the arc push plate 1003 continues to push the hollow air cushion 1 004, the hollow air cushion 1004 is squeezed so that the frosting block 1005 can tightly fix the metal tube. By arranging multiple frosting blocks 1005 on one side of the hollow air cushion 1004 to directly contact the metal tube, the friction force is increased. When the hollow air cushion 1004 is squeezed by the arc-shaped push plate 1003, the side close to the frosting block 1005 pushes the metal tube in a completely fitting manner. When the hollow air cushion 1004 is squeezed, the gas inside is quickly discharged to the outside through the exhaust holes 1006 on both sides. Semi-conical sheets 1007 are arranged on both sides of the hollow air cushion 1004 near the exhaust holes 1006 to surround and cover them. After the metal tube is fixed by the inner clamp device 10, the electric push rod 1101 can push the small circular plate 1102 to the annular The plate moves in the direction of 1, and the small circular plate 1102 moves, and the outer annular arc piece 1103 is driven to move together with it. The radius of the annular arc piece 1103 is larger than the radius of the metal tube. When the annular arc piece 1103 is squeezed on the inner wall of the metal tube, it is concave, and the outer side surface close to the periphery is always in contact with the inner wall of the metal tube. At the same time, the arc scraper 1105 on the outer side of the annular arc piece 1103 is also in contact with the inner wall of the metal tube. When the annular arc piece 1103 moves, it drives the outer arc scraper 1105 to move together. When the arc scraper 1105 moves, it slides and scrapes the inner wall of the metal tube. The oil and other debris scraped off by the arc scraper 1105 will pass through the arc through hole 1104 and fall downward into the area between the inner side of the annular arc piece 1103 and the corrugated ring piece 1106.By opening a plurality of arc-shaped through holes 1104, it is convenient for oil and other debris to pass through. When the annular arc piece 1103 continues to move toward the end face of the metal tube and moves to the outside of the metal tube, the annular arc piece 1103 discharges the cleaned oil and other debris from the inner wall of the metal tube. A wave-shaped ring piece 1106 is arranged inside the annular arc piece 1103 to fully surround and cover the inner area of ​​the annular arc piece 1103. The wave-shaped ring piece 1106 is sleeved on the driving shaft of the electric push rod 1101 and is slidably connected to the driving shaft. The driving shaft connection of the electric push rod 1101 is separated from the area inside the annular arc piece 1103 where oil and other debris are accumulated.

[0057] When the present invention is operated, the electric slide rail 3 drives the concave connecting plate 4 to move in a direction away from the annular plate 1, and the movement of the concave connecting plate 4 drives the annular sleeve plate 1 6 and the annular sleeve plate 2 8 on the top to move together. When the annular sleeve plate 1 6 moves, the motor 5 moves. When the motor 5 moves, the three-rod side frame 7 at one end moves. The movement of the three-rod side frame 7 drives the inner clamping device 10 and the cleaning device 11 to move together. After the inner clamping device 10 moves to a certain distance from the annular plate 1, the metal pipe to be welded is inserted into the inner clamping device 10 and the cleaning device 11 is wrapped therein. At this time, the metal pipe is clamped and fixed by the inner clamping device 10, and then the impurities on the inner wall of the metal pipe are cleaned and discharged by the cleaning device 11, and then the electric slide rail 3 can be used again. The fixed metal tube is driven to move toward the annular plate 1. When the metal tube moves, the end face gradually approaches the grinding device 9 and contacts the grinding device 9. At this time, the motor 5 is started to drive the three-rod side frame 7 to rotate. When the three-rod side frame 7 rotates, the metal tube is driven to rotate through the inner clamping device 10. At this time, the grinding device 9 grinds the end face of the rotating metal tube. After the end face grinding of the metal tube is completed, the metal tube can continue to be driven to move toward the annular plate 1 through the electric slide rail 3 until the end faces of the two metal tubes are in contact and docked. At this time, the motor 5 is started again to drive the two metal tubes to rotate synchronously, and the end faces of the two metal tubes are welded by the welder 2. The metal tube moves toward the annular plate 1 until it contacts the arc file 901 and stops. At this time, the motor 5 is started again to drive the two metal tubes to rotate synchronously, and the welder 2 is used to weld the joints of the end faces of the two metal tubes. The metal tube stops moving toward the annular plate 1 and contacts the arc file 901. The electric motor 5 drives the metal tube to rotate through the inner clamping device 10. When the metal tube rotates, the arc file 901 grinds and smoothes the end surface of the metal tube. At the same time, when the metal tube rotates, the arc steel brushes 905 on both sides of the arc file 901 also contact the end surface of the metal tube. When the metal tube rotates, the arc steel brushes 905 rub and clean the end surface of the metal tube. The arc blocking pieces 906 arranged at the top and bottom of the arc file 901 surround and cover the area around the arc file 901. After the end surface of the metal tube is ground, the electric slide rail 3 can continue to drive the metal tube to move in the direction of the annular plate 1. When the metal tube moves, the arc file 901 is pushed to drive the rectangular rotating plate 902 to rotate in an inclined direction toward the annular plate 1. When the rectangular rotating plate 902 rotates, the reset spring 904 is pressed. The metal tube is stretched until it passes through the rectangular rotating plate 902. At this time, the rectangular rotating plate 902 rotates to contact the outer surface of the metal tube. When the metal tube is welded and taken out from the inner clamping device 10, the rectangular rotating plate 902 loses the thrust of the metal tube. The return spring 904 drives the rectangular rotating plate 902 to rotate toward the inner clamping device 10 through the retraction force. The return spring 904 is set to drive the rectangular rotating plate 902 to rotate to a vertical state and give the rectangular rotating plate 902 a certain pulling force. Before the metal tube welding operation is performed, the metal tube is first inserted between the three hollow air cushions 1004 in the annular plate 1001 and passed through the cleaning device 11 to wrap it inside. At this time, the arc-shaped push plate 1003 is pushed to the inner side of the annular plate 1001 by the hydraulic push rod 1002 to move.When the arc push plate 1003 moves, the hollow air cushion 1004 on one side is driven to move together. The hollow air cushion 1004 gradually moves to the inner side of the annular plate 1001 until the frosting block 1005 on the surface contacts the surface of the metal tube. When the arc push plate 1003 continues to push the hollow air cushion 1004, it squeezes the hollow air cushion 1004 so that the frosting block 1005 tightly fixes the metal tube. By arranging multiple frosting blocks 1005 on one side of the hollow air cushion 1004 to directly contact the metal tube, the friction force is increased. When the hollow air cushion 1004 is squeezed by the arc push plate 1003, it is close to the frosting block 1005. 05 is pushed against the metal tube in a completely fitting manner on one side. When the hollow air cushion 1004 is squeezed, the gas inside is quickly discharged to the outside through the exhaust holes 1006 on both sides. Semi-conical sheets 1007 are arranged on both sides of the hollow air cushion 1004 near the exhaust holes 1006 to surround and cover it. After the metal tube is fixed by the inner clamp device 10, the electric push rod 1101 can push the small circular plate 1102 to move in the direction of the annular plate 1. When the small circular plate 1102 moves, it drives the outer annular arc sheet 1103 to move together. The radius of the annular arc sheet 1103 is larger than the radius of the metal tube. When the annular arc piece 1103 is squeezed on the inner wall of the metal tube, it is concave, and the outer side surface close to the periphery is in contact with the inner wall of the metal tube at all times. At the same time, the arc scraper 1105 on the outer side of the annular arc piece 1103 is also in contact with the inner wall of the metal tube. When the annular arc piece 1103 moves, it drives the outer arc scraper 1105 to move together. When the arc scraper 1105 moves, it slides and scrapes the inner wall of the metal tube. The oil and other debris scraped off by the arc scraper 1105 will pass through the arc through hole 1104 and fall downward into the area between the inner side of the annular arc piece 1103 and the corrugated ring piece 1106. By opening a plurality of arc through holes 1104, The hole 1104 is convenient for oil and other debris to pass through. When the annular arc piece 1103 continues to move toward the end face of the metal tube and moves to the outside of the metal tube, the annular arc piece 1103 discharges the cleaned oil and other debris from the inner wall of the metal tube. A wave-shaped ring piece 1106 is arranged inside the annular arc piece 1103 to fully surround and cover the inner area of ​​the annular arc piece 1103. The wave-shaped ring piece 1106 is sleeved on the driving shaft of the electric push rod 1101 and is slidably connected to the driving shaft. The driving shaft connection of the electric push rod 1101 is separated from the area inside the annular arc piece 1103 where oil and other debris are accumulated by the wave-shaped ring piece 1106.

[0058] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A welding device for butting metal pipe ends, characterized in that: include: An annular plate (1), wherein a welder (2) is provided on the inner side of the annular plate (1); An electric slide rail (3), the electric slide rail (3) being used to adjust the distance between the metal pipe and the welder (2), and a concave connecting plate (4) being provided on the top of the electric slide rail (3); An electric motor (5), wherein an annular sleeve plate (6) is disposed on the outer side of the electric motor (5); A three-rod side frame (7), wherein an annular sleeve plate 2 (8) is arranged on the outer side of the three-rod side frame (7); A grinding device (9), the grinding device (9) is used to flatten, grind and clean the end surface butt joint of the metal pipe; An inner clamping device (10), the inner clamping device (10) is used to perform inner push-type clamping and fixing of metal pipes of different sizes; A cleaning device (11), the cleaning device (11) is used to clean and discharge debris on the inner wall of the metal pipe; The inner side of the annular plate (1) is fixedly connected to one end of the welder (2); the top of the electric slide rail (3) is slidably connected to the bottom of the concave connecting plate (4); the top of the concave connecting plate (4) is fixedly connected to the outer side of the annular sleeve plate (6); the annular sleeve plate (6) is sleeved on the outer side of the motor (5) and fixedly connected to the motor (5); the end of the concave connecting plate (4) away from the annular sleeve plate (6) is fixedly connected to the outer side of the annular sleeve plate (8); the annular sleeve plate (6) is sleeved on the outer side of the motor (5) and fixedly connected to the motor (5); the end of the concave connecting plate (4) away from the annular sleeve plate (6) is fixedly connected to the outer side of the annular sleeve plate (8); Plate 2 (8) is sleeved on the outside of the three-rod side frame (7) and is rotatably connected to the three-rod side frame (7); one side of the three-rod side frame (7) is fixedly connected to the drive shaft of the motor (5); the side of the three-rod side frame (7) away from the motor (5) is fixedly connected to the side of the grinding device (9); the inner side of the three-rod side frame (7) is fixedly connected to the side of the cleaning device (11); and the side of the annular plate 1 (1) close to the inner clamping device (10) is fixedly connected to the side of the grinding device (9); Wherein, the grinding device (9) comprises: An arc-shaped file (901), which is used to grind and smooth the end surface of the metal pipe, and a rectangular rotating plate (902) is provided on one side of the arc-shaped file (901); A curved connecting plate (903), wherein a return spring (904) is arranged on the inner side of the curved connecting plate (903); One side of the arc-shaped file (901) is fixedly connected to one side of the rectangular rotating plate (902), one side of the rectangular rotating plate (902) is rotatably connected to the inner side of the curved connecting plate (903) via a rotating bolt, the inner side of the curved connecting plate (903) is fixedly connected to one end of a return spring (904), and one end of the return spring (904) away from the curved connecting plate (903) is fixedly connected to one side of the rectangular rotating plate (902) close to the arc-shaped file (901); One side of the curved connecting plate (903) is fixedly connected to one side of the annular plate (1).

2. A metal pipe end butt welding device according to claim 1, characterized in that: The outer side of the annular plate 1 (1) is fixedly connected with a bottom connecting plate (12), and the bottom of the bottom connecting plate (12) is fixedly connected with the top of the electric slide rail (3).

3. The metal pipe end butt welding device according to claim 1, characterized in that: Both sides of the arc-shaped file (901) are fixedly connected with arc-shaped steel brushes (905), and the outer side of the arc-shaped file (901) is fixedly connected with an arc-shaped blocking piece (906).

4. A metal pipe end butt welding device according to claim 3, characterized in that: A plurality of arc-shaped steel brushes (905) are provided, and the plurality of arc-shaped steel brushes (905) are evenly distributed on both sides of the arc-shaped file (901); a plurality of arc-shaped baffles (906) are provided, and the plurality of arc-shaped baffles (906) are distributed on the outside of the arc-shaped file (901).

5. The metal pipe end butt welding device according to claim 1, characterized in that: The inner clamping device (10) comprises an annular plate 2 (1001), the outer side of the annular plate 2 (1001) is fixedly connected with a hydraulic push rod (1002), the driving shaft of the hydraulic push rod (1002) is fixedly connected with an arc-shaped push plate (1003), the side of the arc-shaped push plate (1003) away from the hydraulic push rod (1002) is fixedly connected with a hollow air cushion (1004), the side of the hollow air cushion (1004) away from the arc-shaped push plate (1003) is fixedly connected with a grinding block (1005), both sides of the hollow air cushion (1004) are provided with exhaust holes (1006), and the side of the hollow air cushion (1004) close to the exhaust hole (1006) is fixedly connected with a semi-conical sheet (1007).

6. The metal pipe end butt welding device according to claim 5, characterized in that: One side of the annular plate 2 (1001) is fixedly connected to one side of the three-rod side frame (7), and a plurality of the sanding blocks (1005) are provided, and the plurality of the sanding blocks (1005) are evenly distributed on one side of the hollow air cushion (1004).

7. The metal pipe end butt welding device according to claim 5, characterized in that: There are multiple exhaust circular holes (1006), and the multiple exhaust circular holes (1006) are evenly distributed on both sides of the hollow air cushion (1004); there are multiple semi-conical sheets (1007), and the multiple semi-conical sheets (1007) are evenly distributed on both sides of the hollow air cushion (1004).

8. The metal pipe end butt welding device according to claim 1, characterized in that: The cleaning device (11) comprises an electric push rod (1101), the driving shaft of the electric push rod (1101) is fixedly connected to a small circular plate (1102), an annular arc sheet (1103) is sleeved and fixedly connected to the outer side of the small circular plate (1102), an arc-shaped through hole (1104) is opened on the outer side of the annular arc sheet (1103), an arc-shaped scraper (1105) is fixedly connected to the outer side of the annular arc sheet (1103), and a corrugated ring sheet (1106) is fixedly connected to the inner side of the annular arc sheet (1103).

9. The metal pipe end butt welding device according to claim 8, characterized in that: One end of the electric push rod (1101) away from the small circular plate (1102) is fixedly connected to the inner side of the three-rod side frame (7), and the corrugated ring piece (1106) is sleeved on the driving shaft of the electric push rod (1101) and is slidably connected to the driving shaft of the electric push rod (1101).

10. The metal pipe end butt welding device according to claim 8, characterized in that: A plurality of arc-shaped through holes (1104) are provided, and the plurality of arc-shaped through holes (1104) are evenly distributed on the outside of the annular arc sheet (1103); a plurality of arc-shaped scraping blades (1105) are provided, and the plurality of arc-shaped scraping blades (1105) are evenly distributed on the outside of the annular arc sheet (1103).

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