A welding apparatus for seamless steel pipes

Abstract

The present application relates to the field of seamless steel pipe welding, disclose a kind of welding equipment for seamless steel pipe, including fixed frame, both sides of the fixed frame are provided with support structure, the middle of the upper surface of the fixed frame is provided with shielding welding structure, the middle below of the fixed frame is provided with shielding polishing structure, two groups of support structures can be automatically driven to rotate and fold by first transmission structure, and each group of support structure can also be folded during folding, which greatly reduces the occupied space of the welding equipment, saves working floor area, and when the support structure is turned out for seamless steel pipe welding, each group of support structure can also be automatically pushed away to stabilize the support of steel pipe, and the operation is more labor-saving and convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of seamless steel pipe welding, in particular to a welding equipment for seamless steel pipe. BACKGROUND

[0002] The seamless steel pipe is a steel pipe without weld on the surface, which is called seamless steel pipe. According to the production method, the seamless steel pipe can be divided into hot-rolled seamless steel pipe, cold-rolled seamless steel pipe, cold-drawn seamless steel pipe, extruded seamless steel pipe, top pipe and the like. When connecting the seamless steel pipes, welding equipment needs to be used to weld the steel pipes.

[0003] The welding equipment in the prior art places two steel pipes on two support seats on the base when welding the end portions of the two steel pipes, and the end portions of the two steel pipes are abutted on the two support seats, and then welding work is performed.

[0004] However, when welding a seamless steel pipe with large size and long length, in order to ensure the stability of the support of the steel pipe, the size of the support seat on the welding equipment needs to be increased accordingly, which leads to the welding equipment being too large in size, and thus a large working space needs to be occupied when storing the welding equipment. Therefore, there is room for improvement. SUMMARY

[0005] In order to solve the problems in the background art, the present application provides a welding equipment for seamless steel pipe.

[0006] The welding equipment for seamless steel pipe provided by the present application adopts the following technical scheme:

[0007] The welding equipment for seamless steel pipe comprises a fixing frame, support structures are arranged on the left and right sides of the fixing frame, a shielding welding structure is arranged on the middle of the upper surface of the fixing frame, and a shielding polishing structure is arranged below the middle of the fixing frame.

[0008] The support structure comprises two first moving frames arranged on the left and right sides of the fixing frame, the first moving frames are arranged on the fixing frame through rotating folding structures, guide rods are connected to the two corners below the side away from each other of the two first moving frames, guide pipes are movably sleeved on the guide rods, one end of the guide pipe is connected to a second moving frame, universal wheels are installed at the two ends below the first moving frame and the second moving frame, support plates are installed at the top ends of the inner walls of the first moving frame and the second moving frame, the steel pipes are placed on the support plates, a tensioning structure is arranged at the top end of the second moving frame, and an abutting structure is arranged above the fixing frame.

[0009] The rotating folding structure comprises a groove formed on the front surface of the fixing frame, rotating columns are arranged at the left and right ends of the front surface of the fixing frame, rotating discs are fixedly installed on the upper and lower ends of the rotating columns, the rotating discs are rotatably arranged on the fixing frame, connecting plates are fixedly sleeved on the upper and lower ends of the rotating columns, one end of the connecting plate is connected to the first moving frame, and a first transmission structure is arranged on the fixing frame.

[0010] Preferably, the first transmission structure comprises a groove formed on the front surface of the fixing frame, a first cylinder is installed on the middle of the groove wall, the output shaft bottom end of the first cylinder is connected to a first lifting plate, second through grooves are formed on the left and right side walls of the groove for the first lifting plate to move through, lifting sleeves are fixedly installed on both ends of the first lifting plate, the lifting sleeves are movably sleeved on the rotating columns, first vertical grooves are formed on the upper and lower sections of the rotating columns, a first driving groove is formed on the top end of the rotating column and communicates with the top end of the first vertical groove, a first insertion rod is fixedly inserted into the top end of the rotating column, one end of the first insertion rod is slidably arranged in the first vertical groove, a rotating sleeve is rotatably sleeved on the lifting sleeve, a push-pull plate is rotatably connected to the rotating sleeve, a first through groove is formed on the first moving frame for the push-pull plate to pass through, and one end of the push-pull plate is rotatably connected to the guide pipe.

[0011] Preferably, the tensioning structure comprises horizontal grooves formed at the top ends of the front and rear side surfaces of the second moving frame, a moving block is slidably arranged in the horizontal groove, first electric telescopic rods are installed on the two corners of the side surface of the second moving frame close to the fixing frame, one end of the output shaft of the first electric telescopic rod is connected to the moving block, a first rotating shaft is rotatably connected to the moving block, a rotating bar is fixedly sleeved on one end of the first rotating shaft, one end of the rotating bar is fixedly connected to an end plate, and the two end plates are provided with a tensioning plate through an adjusting structure, the tensioning plate is tensioned on the end of the steel pipe, and a turnover structure is arranged between the moving block and the second moving frame.

[0012] Preferably, the adjusting structure is a second insertion rod arranged at both ends of the tensioning plate, the second insertion rod is movably inserted into the end plate, one of the second insertion rods is provided with a thread, a threaded groove is formed on the corresponding end plate, and the end of the second insertion rod rotatably penetrating out of the tensioning plate is fixedly sleeved with a rotating block.

[0013] Preferably, the turnover structure comprises a first gear fixedly sleeved on the middle of the first rotating shaft, a driving frame movably penetrates through the moving block, the driving frame is provided with teeth meshingly connected with the first gear, a third insertion rod penetrates through the bottom end of the driving frame, second driving grooves are formed on the upper parts of the front and rear side surfaces of the second moving frame, and one end of the third insertion rod movably penetrates into the second driving groove.

[0014] Preferably, the abutting structure comprises two groups of fixed seats mounted on the left and right sides of the inner wall of the fixed frame, a first arc-shaped slot is formed on each fixed seat, a rotating ring is movably arranged in the first arc-shaped slot of each group of two fixed seats, a plurality of second electric telescopic rods are circumferentially and equiangularly arranged on the inner wall of the rotating ring, an abutting plate is mounted on the output shaft of the second electric telescopic rod, and a driving structure is arranged between the rotating ring and the fixed frame.

[0015] Preferably, the driving structure comprises a first motor mounted on the rear side of the upper surface of the fixed frame, a third gear is fixedly arranged on the output shaft of the first motor, two first fixed blocks are arranged on the upper surface of the rear side of the inner wall of the fixed frame and close to the position of the first motor, a cross bar is movably arranged on the two first fixed blocks, a second gear is fixedly arranged on the two ends of the cross bar close to the two rotating rings, a gear ring is fixedly arranged on the middle of the outer side of the rotating ring, a second arc-shaped slot is formed on the fixed seat for the gear ring to movably pass through, the second gear is in meshing connection with the teeth of the gear ring, a fifth gear is fixedly arranged on the middle of the cross bar, and the fifth gear is in meshing connection with the third gear.

[0016] Preferably, the shielding and welding structure comprises a U-shaped frame fastened on the middle of the upper surface of the fixed frame by bolts, a second air cylinder is mounted on the middle of the upper surface of the U-shaped frame, an upper shielding cover is mounted on the output shaft of the second air cylinder and protrudes from the bottom end of the U-shaped frame, and a welding machine is mounted on the middle of the inner wall of the upper shielding cover.

[0017] Preferably, the shielding and polishing structure comprises a lower shielding cover arranged below the middle of the fixed frame, a second motor is mounted on one side of the lower shielding cover, a polishing wheel is fixedly arranged on the output shaft of the second motor and protrudes into the inner part of the lower shielding cover, and a second transmission structure is arranged between the lower shielding cover and the upper shielding cover.

[0018] Preferably, the second transmission structure comprises second lifting plates connected below the front and rear sides of the lower shielding cover, the second lifting plates are inserted into second vertical grooves formed below the inner walls of the front and rear sides of the fixed frame, vertical rods are connected between the groove walls at the upper and lower ends of the second vertical grooves, the second lifting plates are movably arranged on the vertical rods, the second lifting plate on the rear side protrudes from one end of the fixed frame and is connected with a first transmission plate, two second fixed blocks are arranged on the rear side of the fixed frame and close to the middle, a second rotating shaft is movably arranged on the two second fixed blocks, a fourth gear is fixedly arranged on the middle of the second rotating shaft, a second transmission plate is arranged on the rear side of the fixed frame and close to the fourth gear, the first transmission plate and the second transmission plate are arranged on the left and right sides of the fourth gear, the first transmission plate and the second transmission plate are provided with teeth in meshing connection with the fourth gear, the second transmission plate is in the shape of "L", one end of the second transmission plate is connected with the upper shielding cover, and the second transmission plate passes through a third vertical groove formed in the U-shaped frame.

[0019] In summary, the present application comprises the following beneficial technical effects:

[0020] The present application is provided with a support structure, a rotating folding structure and a first transmission structure. The first transmission structure can automatically drive two groups of support structures to rotate and fold. During the folding process, each group of support structures can be folded. This greatly reduces the occupied space of the welding equipment, saves the working area, and automatically pushes away each group of support structures when the support structures are rotated to weld the seamless steel pipe. The steel pipe is stably supported, which is more labor-saving and convenient to operate.

[0021] The present application is provided with a tensioning structure, an adjusting structure and a turnover structure. The tensioning structure and the turnover structure can drive the tensioning plate to rotate and abut against the end of the steel pipe. The ends of the two steel pipes to be welded can be abutted together to improve the welding quality. When the tensioning plate moves in the opposite direction, it can automatically turn to a vertical downward rotation to avoid interfering with the feeding and discharging work of the steel pipe.

[0022] The present application is provided with an abutting structure and a driving structure. The abutting structure abuts and limits the steel pipe near the welding end to avoid position deviation during the welding process, thereby improving the welding quality. In cooperation with the driving structure, the steel pipe can be automatically rotated during the welding process to weld the end of the steel pipe at each position, thereby improving the work efficiency.

[0023] The present application is provided with a shielding welding structure, a shielding grinding structure and a second transmission structure. The shielding welding structure and the shielding grinding structure can shield the debris generated during the welding process, and can also automatically grind the welded steel pipe to improve the work quality. Through the second transmission structure, the shielding welding structure and the shielding grinding structure can be automatically moved in opposite directions synchronously to perform shielding, welding and grinding work. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structure schematic view of a seamless steel pipe welding equipment in an embodiment of the present application;

[0025] Figure 2 is a structure schematic view of a fixed frame in an embodiment of the present application;

[0026] Figure 3 is an enlarged view of structure A of Figure 2 in an embodiment of the present application;

[0027] Figure 4 is an enlarged view of structure B of Figure 2 in an embodiment of the present application;

[0028] Figure 5 is a structure schematic view ofFigure 2 is an enlarged view of the structure at C of

[0029] Figure 6 is a structural schematic view of the support structure in the embodiment of the application;

[0030] Figure 7 is an enlarged view of the structure at D of Figure 6

[0031] Figure 8 is a structural schematic view of the rear side of the fixing frame in the embodiment of the application;

[0032] Figure 9 is an enlarged view of the structure at E of Figure 8

[0033] BRIEF DESCRIPTION OF THE DRAWINGS: 1, fixing frame; 2, first moving frame; 3, support plate; 4, second moving frame; 5, guide rod; 6, guide pipe; 7, first through slot; 8, push-pull plate; 9, first air cylinder; 10, first lifting plate; 11, second through slot; 12, groove; 13, universal wheel; 14, lifting sleeve; 15, rotating sleeve; 16, rotating column; 17, first inserting rod; 18, first vertical slot; 19, first driving slot; 20, connecting plate; 21, rotating disc; 22, horizontal slot; 23, moving block; 24, first electric telescopic rod; 25, first rotating shaft; 26, rotating strip; 27, end plate; 28, tensioning plate; 29, second inserting rod; 30, rotating block; 31, first gear; 32, driving frame; 33, second driving slot; 34, fixing seat; 35, rotating ring; 36, second electric telescopic rod; 37, abutting plate; 38, first arc-shaped slot; 39, gear ring; 40, second arc-shaped slot; 41, first fixing block; 42, horizontal rod; 43, second gear; 44, first motor; 45, third gear; 46, U-shaped frame; 47, second air cylinder; 48, upper shielding cover; 49, lower shielding cover; 50, second motor; 51, polishing wheel; 52, second vertical slot; 53, second lifting plate; 54, vertical rod; 55, first transmission plate; 56, second fixing block; 57, second rotating shaft; 58, fourth gear; 59, second transmission plate; 60, third vertical slot; 61, fifth gear; 62, third inserting rod. DETAILED DESCRIPTION

[0034] The application will be further described below in conjunction with the accompanying drawings. Figures 1-9 The application will be further described below in conjunction with the accompanying drawings.

[0035] With reference to the drawings, Figures 1-9 the embodiment of the application discloses a welding device for seamless steel pipes, which comprises a fixing frame 1, support structures are arranged on the left and right sides of the fixing frame 1, shielding welding structures are arranged on the upper middle part of the fixing frame 1, and shielding polishing structures are arranged below the middle part of the fixing frame 1; ​​

[0036] The support structure comprises two first moving frames 2 arranged at the left and right sides of the fixed frame 1, the first moving frame 2 is arranged on the fixed frame 1 through a rotary folding structure, the two first moving frames 2 are connected with guide rods 5 at two corners below a side away from each other, the guide rod 5 is movably sleeved with a guide pipe 6, one end of the guide pipe 6 is connected with a second moving frame 4, universal wheels 13 are installed at the lower ends of the first moving frame 2 and the second moving frame 4, support plates 3 are installed at the top ends of the inner walls of the first moving frame 2 and the second moving frame 4, a steel pipe is placed on the support plate 3, a tensioning structure is arranged at the top end of the second moving frame 4, and a pressing structure is arranged at the upper part in the fixed frame 1;

[0037] The rotary folding structure comprises a groove 12 arranged on the front surface of the fixed frame 1, rotary columns 16 are arranged at the left and right ends of the front surface of the fixed frame 1, rotary discs 21 are fixedly installed on the upper and lower ends of the rotary column 16, the rotary disc 21 is rotatably arranged on the fixed frame 1, a connecting plate 20 is fixedly sleeved on the upper and lower ends of the rotary column 16, one end of the connecting plate 20 is connected with the first moving frame 2, and the fixed frame 1 is provided with a first transmission structure;

[0038] The first transmission structure comprises the groove 12 arranged on the front surface of the fixed frame 1, a first cylinder 9 is installed in the middle of the groove wall of the groove 12, a first lifting plate 10 is connected with the output shaft of the first cylinder 9 at the bottom end, second through grooves 11 are arranged on the groove walls on the left and right sides of the groove 12 and used for allowing the first lifting plate 10 to movably pass through, lifting sleeves 14 are fixedly installed at the two ends of the first lifting plate 10, the lifting sleeve 14 is movably sleeved on the rotary column 16, a first vertical groove 18 is arranged on the upper and lower sections of the rotary column 16, a first driving groove 19 is arranged on the rotary column 16 and communicated with the top end of the first vertical groove 18, a first inserting rod 17 is fixedly inserted into the top end of the rotary column 16, one end of the first inserting rod 17 is slidably arranged in the first vertical groove 18, a rotating sleeve 15 is rotatably sleeved on the lifting sleeve 14, a push-pull plate 8 is rotatably connected with the rotating sleeve 15, a first through groove 7 is arranged on the first moving frame 2 and used for allowing the push-pull plate 8 to pass through, and one end of the push-pull plate 8 is rotatably connected with the guide pipe 6. When the device is stored, the first cylinder 9 can be started to drive the first lifting plate 10 to move upwards in the groove 12, the first lifting plate 10 drives the lifting sleeve 14 and the first end of the first inserting rod 17 in the first vertical groove 18 on the rotary column 16 to slide, when the first end of the first inserting rod 17 slides into the first driving groove 19, the first end of the first inserting rod 17 extrudes the groove wall of the first driving groove 19, the rotary column 16 is pushed to rotate, the two groups of first moving frames 2 and second moving frames 4 can be rotatably folded to the front side of the fixed frame 1 by the rolling of the universal wheels 13, the occupied space of the device is reduced, when the rotary column 16 rotates, the first end of the push-pull plate 8 is driven by the rotating sleeve 15 to move upwards, the second moving frame 4 is pulled to move at the first moving frame 2, the first moving frame 2 and the second moving frame 4 are folded, the occupied space of the device is further reduced, the device is convenient to store, and the occupation of the working space is reduced.

[0039] Referring to Figure 1 , Figure 6 and Figure 7 , the tensioning structure comprises a horizontal groove 22 opened at the top end of the front and rear sides of the second moving frame 4, a moving block 23 slidingly arranged in the horizontal groove 22, a first electric telescopic rod 24 mounted above the two corners of the side of the second moving frame 4 close to the fixed frame 1, the output shaft of the first electric telescopic rod 24 connected to the moving block 23 at one end, a first rotating shaft 25 rotatably connected to the moving block 23, a rotating bar 26 fixedly sleeved on the first rotating shaft 25 at one end, an end plate 27 fixedly connected to one end of the rotating bar 26, and a tensioning plate 28 arranged on the two end plates 27 through an adjusting structure, the tensioning plate 28 tensioned at the end of the steel pipe, and a turnover structure arranged between the moving block 23 and the second moving frame 4;

[0040] The adjusting structure is a second insertion rod 29 arranged at the two ends of the tensioning plate 28, the second insertion rod 29 movably inserted into the end plate 27, one of the second insertion rods 29 provided with a thread, a threaded groove opened in the corresponding end plate 27, and a rotating block 30 fixedly sleeved on the end of the second insertion rod 29 rotating out of the tensioning plate 28, the second insertion rod 29 provided with the thread rotatably arranged by the rotating block 30, the position of the tensioning plate 28 on the end plate 27 adjusted according to the actual length of the steel pipe;

[0041] The turnover structure comprises a first gear 31 fixedly sleeved on the middle of the first rotating shaft 25, a driving frame 32 movably penetrating through the moving block 23, the driving frame 32 provided with gear teeth meshingly connected to the first gear 31, the third insertion rod 62 fixedly penetrating through the bottom end of the driving frame 32, a second driving groove 33 opened above the front and rear sides of the second moving frame 4, and the end of the third insertion rod 62 movably inserted into the second driving groove 33, before welding, the first electric telescopic rod 24 actuated to drive the moving block 23 to move in the horizontal groove 22 towards the side close to the fixed frame 1, the bottom end of the third insertion rod 62 at the bottom end of the driving frame 32 sliding in the second driving groove 33, the upward movement of the driving frame 32 corresponding to the second driving groove 33, the first rotating shaft 25 and the rotating bar 26 rotated to a horizontal state by the first gear 31, and the tensioning plate 28 turned on, so that the tensioning plate 28 is moved to the end of the steel pipe away from the welding by the continuous movement of the moving block 23, the two steel pipes pushed to be close to each other, the position deviation of the steel pipes in the horizontal direction avoided, and the welding quality ensured, after welding, the first electric telescopic rod 24 actuated to drive the moving block 23 to move reversely to reset, the rotating bar 26 turned over to a vertical downward state, and the tensioning plate 28 turned off to avoid the tensioning plate 28 from interfering with the feeding and discharging work of the steel pipes.

[0042] Referring to Figures 1-3The abutting structure comprises two groups of fixed seats 34 installed on the left and right upper sides of the inner wall of the fixed frame 1, a first arc-shaped groove 38 is formed on each fixed seat 34, and a rotating ring 35 is movably arranged in the first arc-shaped groove 38 of each group of two fixed seats 34; a plurality of second electric telescopic rods 36 are circumferentially and equiangularly arranged on the inner wall of the rotating ring 35, an abutting plate 37 is installed on the output shaft of the second electric telescopic rod 36, and a driving structure is arranged between the rotating ring 35 and the fixed frame 1.

[0043] The driving structure comprises a first motor 44 installed on the upper rear side of the fixed frame 1, a third gear 45 is fixedly sleeved on the output shaft of the first motor 44, two first fixed blocks 41 are arranged on the upper rear side of the inner wall of the fixed frame 1 and close to the first motor 44, a cross rod 42 is rotatably arranged on the two first fixed blocks 41, a second gear 43 is fixedly sleeved on the two ends of the cross rod 42 close to the two rotating rings 35, a gear ring 39 is fixedly sleeved on the middle of the outer side of the rotating ring 35, a second arc-shaped groove 40 is formed on the fixed seat 34 and used for movably arranging the gear ring 39, the second gear 43 is in meshing connection with the teeth of the gear ring 39, a fifth gear 61 is fixedly sleeved on the middle of the cross rod 42, the fifth gear 61 is in meshing connection with the third gear 45, when the two ends of the steel pipe are abutted together, the second electric telescopic rod 36 on the rotating ring 35 is started to drive the abutting plate 37 to move and abut against the steel pipe, the steel pipe is fixedly abutted, and the rolling of the steel pipe in the front-rear direction of the fixed frame 1 is avoided, so that the welding quality is reduced; when welding, the first motor 44 is started to drive the cross rod 42 to rotate through the third gear 45 and the fifth gear 61, and the rotating ring 35 and the clamped steel pipe are driven to rotate through the second gear 43 and the gear ring 39, so that the welding work can be performed on each position of the end of the steel pipe.

[0044] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 8 and Figure 9 , the shielding welding structure comprises a U-shaped frame 46 which is fastened on the middle of the upper surface of the fixed frame 1, a second air cylinder 47 is installed on the middle of the upper surface of the U-shaped frame 46, the output shaft of the second air cylinder 47 penetrates the bottom end of the U-shaped frame 46 and is installed on the upper shielding cover 48, and a welding machine is installed on the middle of the inner wall of the upper shielding cover 48.

[0045] The shielding grinding structure comprises a lower shielding cover 49 arranged below the middle of the fixed frame 1, a second motor 50 is installed on one side of the lower shielding cover 49, a grinding wheel 51 is fixedly sleeved on the output shaft of the second motor 50 which is rotatably inserted into the inner part of the lower shielding cover 49, and a second transmission structure is arranged between the lower shielding cover 49 and the upper shielding cover 48.

[0046] The second transmission structure comprises a second lifting plate 53 connected below the front and rear sides of the lower shielding cover 49, the second lifting plate 53 is inserted into a second vertical slot 52 arranged below the inner wall of the front and rear sides of the fixed frame 1, a vertical rod 54 is connected between the upper and lower ends of the slot wall of the second vertical slot 52, the second lifting plate 53 is movably sleeved on the vertical rod 54, the rear second lifting plate 53 penetrates out of one end of the fixed frame 1 and is connected with a first transmission plate 55, two second fixed blocks 56 are arranged near the middle of the rear side of the fixed frame 1, the two second fixed blocks 56 are rotatably penetrated by a second rotating shaft 57, the second rotating shaft 57 is movably sleeved with a fourth gear 58 arranged at the middle of the second rotating shaft 57, a second transmission plate 59 is arranged near the fourth gear 58 on the rear side of the fixed frame 1, the first transmission plate 55 and the second transmission plate 59 are arranged on the front and rear sides of the fourth gear 58, the first transmission plate 55 and the second transmission plate 59 are provided with gear teeth engaged with the fourth gear 58, the second transmission plate 59 is in the shape of "L", one end of the second transmission plate 59 is connected with the upper shielding cover 48, the second transmission plate 59 penetrates through a third vertical slot 60 arranged on the U-shaped frame 46, when welding, the second cylinder 47 on the U-shaped frame 46 drives the upper shielding cover 48 to move downward, at the same time, the second transmission plate 59 is driven to move, the fourth gear 58 and the second rotating shaft 57 drive the first transmission plate 55 to move upward, and the lower shielding cover 49 is pulled to move upward, when the upper shielding cover 48 and the lower shielding cover 49 are moved to close to the steel pipe, the welding machine can be started to weld the steel pipe, and in the process of rotating welding, the second motor 50 can be started to drive the polishing wheel 51 to rotate, the rotating polishing wheel 51 is used to automatically polish the welded part of the steel pipe, the appearance of the welded steel pipe is beautiful, and the closed upper shielding cover 48 and lower shielding cover 49 can also shield and collect the debris generated in the welding and polishing process, improve the quality of the working environment, and facilitate centralized processing.

[0047] The implementation principle of the welding equipment for seamless steel pipes is as follows: first, two steel pipes to be welded are placed on the support plates in the two groups of first moving frames 2 and second moving frames 4 respectively, then the first electric telescopic rod 24 is started to drive the moving block 23 to move in the transverse groove 22 towards the side close to the fixed frame 1, the third plug rod 62 at the bottom of the driving frame 32 is driven to slide in the second driving groove 33, the upward movement of the driving frame 32 is driven by the groove wall of the second driving groove 33, the first rotating shaft 25 and the rotating bar 26 are rotated to the horizontal state by the first gear 31, and the tension plate 28 is turned on, so that the tension plate 28 is driven to move to the end of the steel pipe away from the welding, so as to push the two steel pipes to be close to each other, so as to avoid the position deviation of the steel pipe in the horizontal direction, then the second electric telescopic rod 36 on the rotating ring 35 is started to drive the abutting plate 37 to move and abut to the steel pipe, so as to abut and fix the steel pipe to avoid the rolling of the steel pipe along the width direction of the fixed frame 1, then the second cylinder 47 on the U-shaped frame 46 is started to drive the upper shielding cover 48 to move downwards, at the same time, the second transmission plate 59 is driven to move, the first transmission plate 55 is driven to move upwards by the fourth gear 58 and the second rotating shaft 57, and the lower shielding cover 49 is pulled upwards, when the upper shielding cover 48 and the lower shielding cover 49 are moved and folded on the steel pipe, the welding machine can be started to weld the steel pipe, the first motor 44 is started, the cross rod 42 is rotated by the third gear 45 and the fifth gear 61, the rotating ring 35 and the clamped steel pipe are rotated by the second gear 43 and the gear ring 39, so as to weld each position of the steel pipe, in the welding process, the second motor 50 can be started to drive the grinding wheel 51 to rotate, the steel pipe welding position is automatically polished by the rotating grinding wheel 51, the appearance of the steel pipe after welding is improved, the upper shielding cover 48 and the lower shielding cover 49 are also used to shield and collect the debris generated in the welding and polishing process, the working environment quality is improved, the concentrated treatment is facilitated, after welding, the first electric telescopic rod 24 is started to drive the moving block 23 to move reversely and reset, the rotating bar 26 is turned to the vertical downward state, so as to turn down the tension plate 28, finally the welded steel pipe is taken out, when the device is stored, the first cylinder 9 can be started to drive the first lifting plate 10 to move upwards in the recess 12, the first lifting plate 10 drives the lifting sleeve 14 to slide in the first plug rod 17 on the first vertical groove 18 of the rotating column 16, when the first plug rod 17 slides to the first driving groove 19, the rotating column 16 is rotated by the extrusion of the first plug rod 17 to the groove wall of the first driving groove 19, and the two groups of first moving frames 2 and second moving frames 4 are rotated and folded to the front side of the fixed frame 1 by the rolling of the universal wheel 13, so as to reduce the occupied space of the device, when the rotating column 16 rotates, the push-pull plate 8 is driven to move upwards by the rotating sleeve 15, so as to drive the second moving frame 4 to move at the first moving frame 2, and the first moving frame 2 and the second moving frame 4 are folded,Thus, the device occupies less space, is convenient to store, reduces the occupation of the working space, has simple structure and practical function.

[0048] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A welding device for seamless steel pipes, comprising a fixing frame (1), characterized in that: The fixing frame (1) is provided with support structures on both the left and right sides, and a shielding welding structure is provided at the middle of the top of the fixing frame (1), and a shielding grinding structure is provided at the lower middle of the inside of the fixing frame (1). The support structure includes two first movable frames (2) located on the left and right sides of the fixed frame (1). The first movable frames (2) are mounted on the fixed frame (1) by a rotating folding structure. The two first movable frames (2) are connected to guide rods (5) at the two corners below the side away from each other. Guide tubes (6) are movably sleeved on the guide rods (5). One end of the guide tubes (6) is connected to the second movable frame (4). Universal wheels (13) are installed at both ends of the first movable frame (2) and the second movable frame (4). Support plates (3) are installed at the top of the inner walls of the first movable frame (2) and the second movable frame (4). Steel pipes are placed on the support plates (3). A tensioning structure is set at the top of the second movable frame (4). A clamping structure is set at the upper part of the fixed frame (1). The rotating folding structure includes a groove (12) on the front of the fixed frame (1). Rotating columns (16) are provided at both the left and right ends of the front side of the fixed frame (1). Turntables (21) are fixedly installed on both the upper and lower ends of the rotating columns (16). The turntables (21) are rotatably mounted on the fixed frame (1). Connecting plates (20) are fixedly sleeved at both the upper and lower ends of the rotating columns (16). One end of the connecting plate (20) is connected to the first moving frame (2). A first transmission structure is provided on the fixed frame (1).

2. The welding equipment for seamless steel pipes according to claim 1, characterized in that: The first transmission structure includes a groove (12) on the front of the fixed frame (1). A first cylinder (9) is installed in the middle of the groove wall of the groove (12). The bottom end of the output shaft of the first cylinder (9) is connected to a first lifting plate (10). A second through groove (11) is provided on the left and right sides of the groove wall for the first lifting plate (10) to move through. Lifting sleeves (14) are fixedly installed at both ends of the first lifting plate (10). The lifting sleeves (14) are movably sleeved on the rotating column (16). A first vertical section is provided at the upper and lower sections of the rotating column (16). The first drive groove (19) is opened on the rotating column (16) to connect the top of the first vertical groove (18). The first insert rod (17) is fixedly inserted at the top of the rotating column (16). One end of the first insert rod (17) is slidably set in the first vertical groove (18). The lifting sleeve (14) is rotatably fitted with a rotating sleeve (15). The rotating sleeve (15) is rotatably connected to a push-pull plate (8). The first moving frame (2) is provided with a first through groove (7) for the push-pull plate (8) to pass through. One end of the push-pull plate (8) is rotatably connected to the guide tube (6).

3. The welding equipment for seamless steel pipes according to claim 1, characterized in that: The tensioning structure includes a transverse groove (22) opened at the top of the front and rear sides of the second movable frame (4). A movable block (23) is slidably arranged in the transverse groove (22). A first electric telescopic rod (24) is installed at the two upper corners of the side of the second movable frame (4) near the fixed frame (1). One end of the output shaft of the first electric telescopic rod (24) is connected to the movable block (23). A first rotating shaft (25) is rotatably connected to the movable block (23). A rotating strip (26) is fixedly sleeved on one end of the first rotating shaft (25). One end of the rotating strip (26) is fixedly connected to the end plate (27). Tensioning plates (28) are set on the two end plates (27) through an adjustment structure. The tensioning plates (28) are tensioned at the end of the steel pipe. A flipping structure is set between the movable block (23) and the second movable frame (4).

4. The welding equipment for seamless steel pipes according to claim 3, characterized in that: The adjustment structure is provided with second inserts (29) at both ends of the tension plate (28). The second inserts (29) are movably inserted into the end plate (27). One of the second inserts (29) is provided with threads, and the corresponding end plate (27) is provided with threaded grooves. The threaded second inserts (29) are rotated and pass through the end of the tension plate (28) and a rotating block (30) is fixedly sleeved on it.

5. The welding equipment for seamless steel pipes according to claim 3, characterized in that: The flipping structure includes a first gear (31) fixedly sleeved on the middle of the first rotating shaft (25), a moving block (23) moving through a drive frame (32), a drive frame (32) having teeth that mesh with the first gear (31), a third insert rod (62) fixedly passing through the bottom of the drive frame (32), and a second drive groove (33) being provided on the upper sides of both the front and rear sides of the second moving frame (4), with one end of the third insert rod (62) being movably inserted into the second drive groove (33).

6. The welding equipment for seamless steel pipes according to claim 1, characterized in that: The clamping structure includes two sets of fixed seats (34) installed on the upper left and right sides of the inner wall of the fixed frame (1). Each fixed seat (34) has a first arc groove (38). A rotating ring (35) moves through the first arc groove (38) of each of the two fixed seats (34). Multiple second electric telescopic rods (36) are installed on the inner wall of the rotating ring (35) at equal angles around the circumference. A clamping plate (37) is installed at one end of the output shaft of the second electric telescopic rod (36). A driving structure is provided between the rotating ring (35) and the fixed frame (1).

7. The welding equipment for seamless steel pipes according to claim 6, characterized in that: The driving structure includes a first motor (44) installed on the rear side of the fixed frame (1). A third gear (45) is fixedly sleeved on the output shaft of the first motor (44). Two first fixed blocks (41) are set on the upper part of the inner wall of the rear side of the fixed frame (1) near the first motor (44). A crossbar (42) rotates through the two first fixed blocks (41). A second gear (43) is fixedly sleeved on both ends of the crossbar (42) near the two rotating rings (35). A toothed ring (39) is fixedly sleeved in the middle of the outer side of the rotating ring (35). A second arc-shaped groove (40) is opened on the fixed seat (34) for the toothed ring (39) to move through. The second gear (43) meshes with the teeth on the toothed ring (39). A fifth gear (61) is fixedly sleeved in the middle of the crossbar (42). The fifth gear (61) meshes with the third gear (45).

8. The welding equipment for seamless steel pipes according to claim 1, characterized in that: The shielding welding structure includes a U-shaped frame (46) fastened to the middle of the fixed frame (1) by bolts. A second cylinder (47) is installed at the middle of the upper part of the U-shaped frame (46). An upper shield (48) is installed at the bottom end of the output shaft of the second cylinder (47) through the U-shaped frame (46). A welding machine is installed at the middle of the inner wall of the upper shield (48).

9. The welding equipment for seamless steel pipes according to claim 1, characterized in that: The shielding and polishing structure includes a lower shield (49) located in the middle of the fixed frame (1). A second motor (50) is installed on one side of the lower shield (49). The output shaft of the second motor (50) is inserted into the lower shield (49) and a polishing wheel (51) is fixedly sleeved on it. A second transmission structure is provided between the lower shield (49) and the upper shield (48).

10. The welding equipment for seamless steel pipes according to claim 9, characterized in that: The second transmission structure includes a second lifting plate (53) connected to the lower sides of the front and rear sides of the lower shield (49). The second lifting plate (53) is inserted into a second vertical groove (52) opened on the lower sides of the inner walls of the front and rear sides of the fixed frame (1). A vertical rod (54) is connected between the upper and lower ends of the groove walls of the second vertical groove (52). The second lifting plate (53) is movably sleeved on the vertical rod (54). The second lifting plate (53) on the rear side protrudes from the fixed frame (1) and is connected to a first transmission plate (55). Two second fixing blocks (56) are set near the middle of the rear side of the fixed frame (1). The two second fixing blocks (56) rotate through a second rotating shaft. 57), a fourth gear (58) is fixedly sleeved at the middle of the second rotating shaft (57). A second transmission plate (59) is provided on the rear side of the fixed frame (1) near the fourth gear (58). The first transmission plate (55) and the second transmission plate (59) are distributed on the front and rear sides of the fourth gear (58). The first transmission plate (55) and the second transmission plate (59) are provided with teeth that mesh with the fourth gear (58). The second transmission plate (59) is "L" shaped. One end of the second transmission plate (59) is connected to the upper shield (48). The second transmission plate (59) passes through the third vertical groove (60) opened on the U-shaped frame (46).

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