Automatic alignment welding device for fire protection pipes

Abstract

The present invention belongs to the field of pipeline welding, and in particular, relates to an automatic alignment welding device for fire protection pipelines, including a conveying frame, on which two conveying mechanisms that are symmetrical in front and back are arranged, and a mounting frame is arranged in the middle of the conveying frame, and a first electric push rod is arranged at the lower part of the mounting frame, and a first sliding mechanism is arranged on the mounting frame, and the mounting frame is also provided with three locking mechanisms that are evenly distributed from front to back, and the first sliding mechanism is connected to the locking mechanism at the rear end of the mounting frame. The three groups of locking mechanisms arranged in the present invention can cooperate with the conveying mechanism, and one group of the locking mechanisms can adjust the distance according to the welding requirements, so as to facilitate the fixed alignment operation of the two-section and three-section fire protection pipelines, and the alignment operation is simple and fast, thereby improving the efficiency of the alignment welding of the fire protection pipelines.

Description

Technical Field

[0001] The invention belongs to the field of pipeline welding, and in particular relates to an automatic alignment welding device for fire protection pipelines. Background Art

[0002] Firefighting pipes are an important part of the firefighting system. They are mainly used to transport firefighting water or other firefighting media to ensure that the building can quickly and effectively extinguish the fire when it occurs. Firefighting pipes are usually made of galvanized steel pipes, seamless steel pipes, stainless steel pipes and other materials with relatively high corrosion resistance and strength.

[0003] At present, when welding fire protection pipes, workers usually need to clean the end faces of the pipes to be welded first, and then align the two pipes with tools. After alignment, the pipes are fixed with clamping tools before welding.

[0004] However, the welding process of the fire-fighting pipes mentioned above still has the following defects: 1. When welding fire-fighting pipes, it is necessary to manually align the two fire-fighting pipes through a pipe centering device or other measuring tools. The entire alignment operation is relatively cumbersome, and the alignment welding operation of the three sections of pipes will become more complicated, so the overall efficiency of the welding operation needs to be improved. 2. After the fire-fighting pipes are fixed by the pipe centering device, the two fire-fighting pipes need to be controlled by a moving mechanism to align with each other. The alignment accuracy depends on the operating accuracy of the pipe centering device and the moving mechanism. The pipe centering device and the moving mechanism need to be regularly maintained and repaired to ensure the alignment quality, and the cost of use is relatively high. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: an automatic alignment welding device for fire protection pipes, comprising a conveying frame, on which two conveying mechanisms that are symmetrical in front and back are arranged, and a mounting frame is arranged in the middle of the conveying frame, a first electric push rod is arranged at the lower part of the mounting frame, a first sliding mechanism is arranged on the mounting frame, and three locking mechanisms evenly distributed from front to back are also arranged on the mounting frame, and the first sliding mechanism is connected to the locking mechanism at the rear end of the mounting frame.

[0006] The locking mechanism includes a first outer ring, on the outer wall of the first outer ring are fixedly provided four fixed seats evenly distributed in the circumferential direction, on the fixed seat is rotatably provided a first screw, on the first screw is threadedly connected a slide seat, the slide seat is slidably provided between the fixed seat and the first outer ring, the ends of the four slide seats close to each other are fixedly connected to a swaying roller, the end of the first screw away from the slide seat is fixedly connected to a first gear, and the rear end of the first outer ring is rotatably provided with a second gear that meshes with the adjacent four first gears at the same time. Connecting columns are fixedly provided on the left and right fixed seats on the first outer ring, and the upper ends of all connecting columns except the two connecting columns on the rearmost side are fixedly connected to the mounting frame, and the two connecting columns on the rearmost side are connected to the corresponding first sliding mechanism, and the rear end of the connecting column on the right side is rotatably provided with a third gear, and the third gear meshes with the adjacent second gear.

[0007] According to a favorable embodiment, a first motor is fixedly provided on a connecting column located on the right front side, and a connecting shaft that drives three third gears on the same side to rotate simultaneously is fixedly connected to the output shaft of the first motor; the connecting shaft is slidingly connected to the connecting column corresponding to the rearmost side and rotationally connected to other corresponding connecting columns, the connecting shaft is fixedly connected to two third gears except the third gear on the rearmost side, and the connecting shaft and the third gear on the rearmost side are slidingly connected by spline fitting.

[0008] According to a favorable embodiment, the conveying mechanism includes a plurality of conveying rollers rotatably arranged on a conveying frame, the left ends of two adjacent conveying rollers are connected by a pulley group, and the left end of any one of the conveying rollers is fixedly connected to a second motor, which is fixedly arranged on the left side of the conveying frame.

[0009] According to a favorable embodiment, the first sliding mechanism includes two second screw rods which are symmetrical and rotatably arranged on the upper part of the mounting frame, the two second screw rods are threadedly connected with a first slider, the first slider is slidably connected to the upper part of the mounting frame, the first slider is fixedly connected to the connecting column corresponding to the rearmost side, the rear ends of the two second screw rods are connected together through a sprocket set, and a third motor is fixedly arranged on the front side wall of the mounting frame, and the output shaft of the third motor is fixedly connected to the front end of one of the second screw rods.

[0010] According to a favorable embodiment, four sliding holes evenly distributed in the circumferential direction are opened on the outer wall of the first outer ring located in the middle, and the four sliding holes are staggered with four fixed seats. A first welding gun is arranged in the sliding hole, and a fourth gear is rotatably arranged at the front end of the first outer ring. The fourth gear is located on the front side of the adjacent second gear, and the fourth gear is fixedly connected to the four first welding guns. A fourth motor is also fixedly arranged on the first outer ring, and a fifth gear meshing with the fourth gear is connected to the output shaft of the fourth motor.

[0011] According to a favorable embodiment, two left-right symmetrical second sliding mechanisms are provided at the middle position of the upper end of the conveying frame, the second sliding mechanism includes a third screw rod rotatably arranged on one of the side walls in the front-rear direction of the conveying frame, the third screw rod is provided with two threaded sections with opposite thread directions and the two threaded sections are threadedly connected to the second sliding block, one end of the third screw rod is fixedly connected to the sixth motor, the sixth motor is fixedly arranged on the side wall of the conveying frame, a push plate is rotatably arranged on the upper part of the second sliding block, a telescopic rod is commonly connected between the two push plates, the telescopic rod is composed of two connecting rods of rectangular structure, the front and rear ends of the telescopic rod are respectively fixedly connected to the two push plates, the seventh motor is fixedly arranged on the second sliding block located on the front side, and the output shaft of the seventh motor is fixedly connected to the adjacent push plate.

[0012] According to a favorable embodiment, two front-to-back symmetrical grinding mechanisms are provided at the front end of the conveying frame, and the grinding mechanism includes a slide rail fixedly arranged at the front end of the conveying frame and located below the conveying roller, a fourth screw is rotatably arranged on the upper part of the slide rail, a third slider is threadedly connected to the fourth screw, a guide rod slidably connected to the third slider is fixedly arranged on the slide rail, an eighth motor is fixedly arranged on any side wall in the left and right directions of the slide rail, the output shaft of the eighth motor is fixedly connected to the fourth screw, a second electric push rod is arranged on the third slider, and a grinder is fixedly connected to the telescopic end of the second electric push rod.

[0013] According to a favorable embodiment, a clamping mechanism is provided at both the front and rear ends of the upper part of the conveying frame, and the clamping mechanism includes two connecting frames fixedly arranged on the upper part of the conveying frame and symmetrical on the left and right, and the connecting frames are arranged above the conveying rollers, and a third electric push rod is fixedly arranged on the connecting frames, and the telescopic end of the third electric push rod is fixedly connected to a splint.

[0014] According to a favorable embodiment, a limiting mechanism is also provided on the upper part of the conveying frame, and the limiting mechanism includes a limiting plate rotatably arranged on the upper part of the rear end of the conveying frame, and a ninth motor is fixedly arranged on the upper part of the rear end of the conveying frame, and the output shaft of the ninth motor is fixedly connected to the right end of the limiting plate, and a stopper is fixedly arranged on the upper part of the conveying frame corresponding to the left end of the limiting plate, and the stopper is movably abutted against the limiting plate.

[0015] According to a favorable embodiment, two second outer rings arranged front to back are fixedly provided at the rear end of the conveying frame, the limit plate is located behind the rearmost second outer ring, the clamping mechanism located at the rear side of the conveying frame is arranged between the two second outer rings, and the rear sides of the two second outer rings are rotatably provided with a sixth gear and a seventh gear that mesh with each other, the sixth gear is concentric with the corresponding second outer ring and the inner ring of the sixth gear is fixedly connected to the second welding gun, and the front side of the second outer ring is fixedly provided with a fifth motor, and the output shaft of the fifth motor is fixedly connected to the seventh gear.

[0016] Compared with the prior art, the automatic alignment welding device for fire protection pipes provided by the present invention has the following beneficial effects: 1. The three groups of locking mechanisms provided in the present invention can cooperate with the conveying mechanism, and one group of the locking mechanisms can adjust the distance according to the welding requirements, so as to facilitate the fixed alignment operation of two-section and three-section fire protection pipes, and the alignment operation is simple and quick, thereby improving the efficiency of the alignment welding of fire protection pipes.

[0017] 2. The present invention uses four straightening rollers on the locking mechanism to abut against the connection between the two fire-fighting pipes from different directions to avoid axial misalignment of the two fire-fighting pipes. Compared with the method of using a high-precision mobile device to control the alignment of the fire-fighting pipes, this method reduces the cost of equipment use while ensuring the alignment accuracy, and is more convenient for later maintenance.

[0018] 3. The two push plates connected to the second sliding mechanism of the present invention can cooperate with the telescopic rod. When the locking mechanism locks and aligns the fire-fighting pipes, the front and rear ends of the two fire-fighting pipes are simultaneously pressed together to assist in the alignment of the two fire-fighting pipes, thereby further improving the stability and quality of the alignment of the fire-fighting pipes.

[0019] 4. The two sets of grinding mechanisms provided in the present invention can cooperate with the clamping mechanism to trim the end faces of the welding ends of the fire-fighting pipes when processing the second / third sections of the pipes, which is beneficial to improving the welding quality of the fire-fighting pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the overall three-dimensional structure diagram of the present invention.

[0021] Figure 2 It is a top plan structural diagram of the present invention.

[0022] Figure 3 It is the main view plan structure diagram of the present invention.

[0023] Figure 4 It is a first partial three-dimensional structural diagram of the conveying rack in the present invention.

[0024] Figure 5 It is a second partial three-dimensional structural diagram of the conveying rack in the present invention.

[0025] Figure 6 It is a partial cross-sectional view of the mounting frame in the present invention.

[0026] Figure 7 It is a three-dimensional structural diagram of the locking mechanism in the present invention.

[0027] Figure 8 It is a three-dimensional structural diagram of the second sliding mechanism in the present invention.

[0028] Fig. 9 It is a third partial three-dimensional structural diagram of the conveying rack in the present invention.

[0029] Fig.10 It is a three-dimensional structural diagram of the second outer ring in the present invention.

[0030] Fig.11 This is a schematic diagram of the fire protection pipe welding process.

[0031] Reference numerals in the figure: 1, conveying frame; 2, conveying mechanism; 201, conveying roller; 202, pulley group; 3, mounting frame; 4, first electric push rod; 5, first sliding mechanism; 501, second screw rod; 502, first slider; 503, sprocket group; 6, locking mechanism; 601, first outer ring; 602, fixed seat; 603, first screw rod; 604, slide seat; 605, straightening roller; 606, first gear; 607, second gear; 608, connecting column; 609, third gear; 6010, connecting shaft; 7, first welding gun; 8, fourth gear; 9, fifth gear; 10 , second sliding mechanism; 1001, third screw rod; 1002, second slider; 11, push plate; 12, telescopic rod; 13, grinding mechanism; 1301, slide rail; 1302, fourth screw rod; 1303, third slider; 1304, guide rod; 1305, second electric push rod; 1306, grinder; 14, clamping mechanism; 1401, connecting frame; 1402, third electric push rod; 1403, clamping plate; 15, limiting mechanism; 1501, limiting plate; 1502, block; 16, second outer ring; 17, sixth gear; 18, seventh gear; 19, second welding gun. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-11 The present invention is described in further detail.

[0033] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5, a fire pipe automatic alignment welding device, comprising a conveyor frame 1, two conveying mechanisms 2 symmetrically arranged in front and back are arranged on the conveyor frame 1, and a mounting frame 3 is arranged in the middle position of the conveyor frame 1, a first electric push rod 4 is arranged at the lower part of the mounting frame 3, a first sliding mechanism 5 is arranged on the mounting frame 3, and three locking mechanisms 6 evenly distributed from front to back are also arranged on the mounting frame 3, and the first sliding mechanism 5 is connected to the locking mechanism 6 at the rear end of the mounting frame 3. Two left-right symmetrical second sliding mechanisms 10 are arranged in the middle position of the upper end of the conveyor frame 1, two front-to-back symmetrical grinding mechanisms 13 are arranged at the front end of the conveyor frame 1, and clamping mechanisms 14 are arranged at both the front and rear ends of the upper part of the conveyor frame 1. A limiting mechanism 15 is also arranged at the upper part of the conveyor frame 1. The fire pipe is transported to the front end of the conveyor frame 1 by external hoisting equipment, and is transported by the two conveying mechanisms 2 on the conveyor frame 1, and the front and rear end faces of the fire pipe are polished in cooperation with the grinding mechanism 13, and two or more fire pipes are moved to the specified position, and locked and aligned by the locking mechanism 6.

[0034] See also Figure 1 and Figure 4 The conveying mechanism 2 includes a plurality of conveying rollers 201 rotatably arranged on the conveying frame 1. The left ends of two adjacent conveying rollers 201 are connected by a belt pulley set 202. The left end of any conveying roller 201 is fixedly connected with a second motor, which is fixedly arranged on the left side of the conveying frame 1. The conveying roller 201 is driven to rotate by the second motor, and the belt pulley set 202 is used for transmission, so that all conveying rollers 201 on the same conveying mechanism 2 can rotate synchronously. The conveying mechanism 2 is installed at both the front and rear ends of the conveying frame 1. Two fire-fighting pipes can be placed on the front and rear conveying mechanisms 2 for transportation, which is convenient for alignment.

[0035] See also Figure 1 , Figure 2 , Figure 3 and Figure 4The grinding mechanism 13 includes a slide rail 1301 fixedly arranged at the front end of the conveying frame 1 and located below the conveying roller 201, a fourth screw 1302 is rotatably arranged on the upper part of the slide rail 1301, a third slider 1303 is threadedly connected to the fourth screw 1302, a guide rod 1304 slidably connected to the third slider 1303 is fixedly arranged on the slide rail 1301, an eighth motor is fixedly arranged on any side wall in the left and right directions of the slide rail 1301, the output shaft of the eighth motor is fixedly connected to the fourth screw 1302, a second electric push rod 1305 is arranged on the third slider 1303, and a grinder 1306 is fixedly connected to the telescopic end of the second electric push rod 1305. The clamping mechanism 14 includes two connecting frames 1401 fixedly arranged on the upper part of the conveying frame 1 and symmetrically arranged on the left and right. The connecting frames 1401 are arranged above the conveying roller 201. A third electric push rod 1402 is fixedly arranged on the connecting frames 1401. The telescopic end of the third electric push rod 1402 is fixedly connected to a clamping plate 1403.

[0036] In order to automatically grind and trim the two end faces of the fire pipe, the second electric push rod 1305 is extended to lift the grinding disc on the grinder 1306 originally under the conveying roller 201 to a certain height, and then the conveying mechanism 2 can move the end face of the fire pipe toward the grinding disc position of the grinder 1306 until the two are in contact with each other, and then the third electric push rod 1402 in the clamping mechanism 14 is extended to make the two clamps 1403 abut against the outer wall of the fire pipe, and then the fire pipe is grinded by the grinder 1306, and at the same time, the eighth motor drives the fourth screw 1302 to rotate to make the third slider 1303 move left and right, and cooperate with the extension of the second electric push rod 1305 to adjust the position of the grinding disc on the grinder 1306, so as to fully grind the end face of the fire pipe. The same method as above can be used to grind both the front and rear end faces of the fire pipe.

[0037] See also Figure 1 , Figure 2 , Figure 5 , Figure 6 and Figure 7The locking mechanism 6 includes a first outer ring 601, on the outer wall of which four fixed seats 602 evenly distributed in the circumferential direction are fixedly arranged, on which a first screw 603 is rotatably arranged, on which a slide 604 is threadedly connected, and the slide 604 is slidably arranged between the fixed seat 602 and the first outer ring 601, and the ends of the four slides 604 close to each other are fixedly connected with a squaring roller 605, and the end of the first screw 603 away from the slide 604 is fixedly connected with a first gear 606, and the rear end of the first outer ring 601 is rotatably arranged with a second gear 607 that simultaneously meshes with the four adjacent first gears 606. Connecting columns 608 are fixedly provided on the left and right fixed seats 602 on the first outer ring 601. The upper ends of all connecting columns 608 except the two connecting columns 608 on the rearmost side are fixedly connected to the mounting frame 3. The two connecting columns 608 on the rearmost side are connected to the corresponding first sliding mechanism 5. A third gear 609 is rotatably provided at the rear end of the right connecting column 608. The third gear 609 is meshed with the adjacent second gear 607. A first motor is fixedly provided on the connecting column 608 on the right front side. A connecting shaft 6010 that drives the three third gears 609 on the same side to rotate simultaneously is fixedly connected to the output shaft of the first motor. The connecting shaft 6010 is driven to rotate by the first motor, and the connecting shaft 6010 simultaneously drives the three third gears 609 to rotate, so that the third gear 609 can drive the corresponding second gear 607 to rotate, so that the second gear 607 can drive the four first gears 606 of the outer ring of the first outer ring 601 to rotate synchronously, and the first gear 606 rotates to drive the first screw 603 to rotate, thereby driving the slide 604 originally contracted in the fixed seat 602 to move, so that the squaring roller 605 on the slide 604 can move toward the center of the first outer ring 601 and abut against the outer wall of the fire protection pipe in the first outer ring 601.

[0038] See also Figure 1 , Figure 5 , Figure 6 and Figure 7 The connecting shaft 6010 is slidably connected to the connecting column 608 corresponding to the rear side and is rotationally connected to other corresponding connecting columns 608. The connecting shaft 6010 is fixedly connected to two third gears 609 except the third gear 609 at the rear side. The connecting shaft 6010 is slidably connected to the third gear 609 at the rear side by spline matching. The third gear 609 at the rear side can slide axially relative to the connecting shaft 6010 and can also rotate synchronously with the connecting shaft 6010, so that the connecting shaft 6010 can simultaneously drive the three third gears 609 to rotate, so that the locking mechanism 6 at the rear side can be adjusted according to the length of the fire protection pipe when the pipe is lifted.

[0039] See also Figure 1 , Figure 2 , Figure 5 and Figure 6 The first sliding mechanism 5 includes two second screw rods 501 that are symmetrical and rotatably arranged on the upper part of the mounting frame 3. The two second screw rods 501 are both threadedly connected with the first slider 502. The first slider 502 is slidably connected to the upper part of the mounting frame 3. The first slider 502 is fixedly connected to the upper end of the connecting column 608 corresponding to the rearmost side. The rear ends of the two second screw rods 501 are jointly connected through a sprocket set 503. A third motor is fixedly arranged on the front side wall of the mounting frame 3. The output shaft of the third motor is fixedly connected to the front end of one of the second screw rods 501. The third motor drives the second screw rod 501 to rotate and drive the first slider 502 to move. The movement of the two first sliders 502 can drive the locking mechanism 6 on the rearmost side to move and adjust the spacing with the locking mechanism 6 at the center.

[0040] See also Figure 1 , Figure 2 , Figure 5 , Figure 6 , Figure 7 and Fig.11 The outer wall of the first outer ring 601 located in the middle is provided with four sliding holes evenly distributed in the circumferential direction, the four sliding holes are staggered with the four fixing seats 602, the first welding gun 7 is arranged in the sliding hole, the front end of the first outer ring 601 is rotatably provided with a fourth gear 8, the fourth gear 8 is located in front of the adjacent second gear 607, the fourth gear 8 is fixedly connected with the four first welding guns 7, the first outer ring 601 is also fixedly provided with a fourth motor, the output shaft of the fourth motor is connected with a fifth gear 9 meshing with the fourth gear 8. The fourth motor drives the fifth gear 9 to rotate, so that the four first welding guns 7 can perform local spot welding on the interface positions of the two fire-fighting pipes.

[0041] The upper end surface of the conveying roller 201 is initially higher than the lower end surface of the first outer ring 601 by a certain height, so that the lower end of the first outer ring 601 will not interfere with the transportation of the fire-fighting pipe. The first fire-fighting pipe is first polished from the front end of the conveying frame 1, passes through the three first outer rings 601 in sequence, and then moves to the rear end of the conveying frame 1. Then the second fire-fighting pipe is placed on the conveying mechanism 2 at the front end of the conveying frame 1 and polished and trimmed again. The front and rear ends of the second fire-fighting pipe seal are polished, and then the second fire-fighting pipe is driven to move toward the center of the conveying frame 1 by the conveying mechanism 2 at the front end of the conveying frame 1. At the same time, the first fire-fighting pipe is driven to move toward the center of the conveying frame 1 by the conveying mechanism 2 at the rear end of the conveying frame 1 until the end faces of the two fire-fighting pipes that are close to each other abut (see Fig.11Then, the slides 604 on the four first outer rings 601 move toward the outer wall of the fire pipe under the rotation drive of the first screw 603 until the four straightening rollers 605 on the same first outer ring 601 abut against the outer wall of the fire pipe at the same time. At this time, the lower end face of the fire pipe is separated from the conveying roller 201 and is in a suspended state. Any straightening roller 605 in the intermediate locking mechanism 6 can abut against the welding position of the two fire pipes at the same time to ensure that the two fire pipes will not be offset. At the same time, the straightening rollers 605 on the front and rear first outer rings 601 can synchronously abut against the ends of the corresponding fire pipes to assist in the stable lifting of the fire pipes. After the two fire pipes are aligned, the interfaces of the two fire pipes are welded by the first welding gun 7. After the welding is completed, the fire pipe returns to the conveying mechanism 2, and the two sections of the welded pipes are synchronously conveyed to the rear end of the conveying frame 1 by the front and rear conveying mechanisms 2 for a certain distance (see Fig.11 ). Then, the entire mounting frame 3 is lifted by the first electric push rod 4, so that the first outer ring 601 gradually rises until its lower end is higher than a certain height of the conveying roller 201, and then the locking mechanism 6 on the rear side is moved toward the rear end of the conveying frame 1 by the first sliding mechanism 5 for a certain distance, and then the two sections of welded pipes are moved forward by the conveying mechanism 2 at the rear end, so that the front ports of the two sections of welded fire pipes are again at the center position of the conveying frame 1, and at the same time, the next fire pipe to be welded is moved to the designated position after grinding and abutted with the second section of welded pipe, and then the above operations are referred to for alignment and welding, and the alignment and welding of the three sections of fire pipes can be completed.

[0042] See also Figure 1 , Figure 2 , Figure 5 and Figure 8 The second sliding mechanism 10 includes a third screw 1001 rotatably arranged on one of the side walls of the conveying frame 1 in the front-rear direction, the third screw 1001 is provided with two threaded segments with opposite thread directions and the two threaded segments are threadedly connected to the second slider 1002, one end of the third screw 1001 is fixedly connected to the sixth motor, the sixth motor is fixedly arranged on the side wall of the conveying frame 1, the upper part of the second slider 1002 is rotatably provided with a push plate 11, the two push plates 11 are commonly connected with a telescopic rod 12, the telescopic rod 12 is composed of two connecting rods of rectangular structure, so that the two connecting rods can slide relative to each other while cannot rotate relative to each other, the second slider 1002 located on the front side is fixedly provided with a seventh motor, and the output shaft of the seventh motor is fixedly connected to the adjacent push plate 11.

[0043] The distance between the two push plates 11 on the second sliding mechanism 10 on the left side of the conveying frame 1 is relatively short, and they are mainly used to apply port pressure to two sections of pipes during welding; the distance between the two push plates 11 on the second sliding mechanism 10 on the right side of the conveying frame 1 is relatively long, and they are mainly used to apply port pressure to three sections of pipes during welding. When the two fire-fighting pipes are driven by the corresponding conveying mechanism 2 to achieve port abutment, the two pushing plates 11 located on the left side of the conveying frame 1 rotate toward one side of the fire-fighting pipe with the cooperation of the seventh motor and the telescopic rod 12, and finally the two pushing plates 11 are respectively located on the side where the two fire-fighting pipes are away from each other, and then the second sliding blocks 1002 are driven by the sixth motor to approach each other at the same time, so that the two pushing plates 11 move toward the ports of the fire-fighting pipes, and finally the front and rear ends of the two fire-fighting pipes are limited after connection, so as to avoid the two fire-fighting pipes from being offset when aligned by the locking mechanism 6, so that the two fire-fighting pipes can be accurately aligned, and when the two sections of the pipe are subsequently welded into three sections, the two pushing plates 11 in the second sliding mechanism 10 on the right side are approached to each other to assist in limiting the three sections of the fire-fighting pipes when they are aligned, so as to meet the automatic welding alignment requirements of the three sections of the fire-fighting pipes.

[0044] See also Figure 1-Figure 11 A limiting mechanism 15 is also provided on the upper part of the conveying frame 1, and the limiting mechanism 15 includes a limiting plate 1501 rotatably provided on the upper part of the rear end of the conveying frame 1, and a ninth motor is fixedly provided on the upper part of the rear end of the conveying frame 1, and the output shaft of the ninth motor is fixedly connected to the right end of the limiting plate 1501, and a stopper 1502 is fixedly provided on the upper part of the conveying frame 1 corresponding to the left end of the limiting plate 1501, and the stopper 1502 is movably abutted against the limiting plate 1501. The rear end of the conveying frame 1 is fixedly provided with two second outer rings 16 arranged front to back, the limit plate 1501 is located behind the rearmost second outer ring 16, the clamping mechanism 14 located on the rear side of the conveying frame 1 is arranged between the two second outer rings 16, and the rear sides of the two second outer rings 16 are rotatably provided with a sixth gear 17 and a seventh gear 18 that mesh with each other, the sixth gear 17 is concentric with the corresponding second outer ring 16 and the inner ring of the sixth gear 17 is fixedly connected with a second welding gun 19, and the front side of the second outer ring 16 is fixedly provided with a fifth motor, and the output shaft of the fifth motor is fixedly connected to the seventh gear 18. After the three sections of fire-fighting pipe are spot-welded and fixed together, the three sections of fire-fighting pipe are continuously conveyed toward the rear end of the conveying frame 1 through the conveying mechanism 2. At this time, the limit plate 1501 rotates 180° under the drive of the fifth motor and then horizontally crosses the upper end of the conveying frame 1. The limit plate 1501 abuts against the stop block 1502, and the stop block 1502 supports the limit plate 1501 until the ports of the three sections of fire-fighting pipe abut against the limit plate 1501. Then, the three sections of fire-fighting pipe are fixed through the clamping mechanism 14 at the right end of the conveying frame 1, and then the seventh gear 18 is driven to rotate by the fifth motor, so that the sixth gear 17 drives the second welding gun 19 to weld again around the interface of the fire-fighting pipe to achieve complete welding.

[0045] See also Figure 1-Figure 11 During specific operation, the first fire-fighting pipe is placed on the conveying mechanism 2 at the front end of the conveying frame 1 through an external lifting device, and then the grinder 1306 at the front end is lifted under the drive of the corresponding second electric push rod 1305, and the front end of the first fire-fighting pipe is moved forward under the drive of the conveying mechanism 2 and finally abuts against the grinding disc on the grinder 1306, and the front end surface of the first fire-fighting pipe is polished and trimmed. After the trimming is completed, the fire-fighting pipe is driven by the front conveying mechanism 2 to move toward the rear end of the conveying frame 1, and finally the first fire-fighting pipe is transferred to the conveying mechanism 2 at the rear end of the conveying frame 1, and the first fire-fighting pipe remains stationary on the conveying mechanism 2 at the rear end of the conveying frame 1, and then the second fire-fighting pipe is placed on the conveying mechanism 2 at the front end of the conveying frame 1 in the same way, and the front and rear end surfaces of the second fire-fighting pipe are polished by the same polishing method, and then the polished second fire-fighting pipe is driven by the front conveying mechanism 2 to move toward the position of the first fire-fighting pipe, so that the first fire-fighting pipe and the second fire-fighting pipe abut against each other, as shown in FIG. Fig.11As shown, the three locking mechanisms 6 then work simultaneously, and the four straightening rollers 605 of the inner ring of the first outer ring 601 gradually shrink to abut and straighten the outer wall of the fire pipe. At the same time, when limiting the position of the two sections of the pipe, the two push plates 11 on the left side of the conveyor frame 1 rotate a certain angle to align the pipe port, and then the two push plates 11 gradually approach each other, and finally abut on the front and rear end surfaces of the two connected fire pipes to assist in alignment. Finally, the two fire pipes are fixed by the three locking mechanisms 6, and then the first welding gun 7 is installed on the first outer ring 601 in the middle, which can spot weld the contact position of the two fire pipes. After welding is completed, the fire-fighting pipe after the two sections of welding returns to the conveying mechanism 2 and moves toward the rear end of the conveying frame 1 to make way for a certain distance. Then, the mounting frame 3 moves upward under the drive of the first electric push rod 4, and drives the first outer ring 601 to move upward, so that the lower end of the first outer ring 601 is located above the conveying roller 201, and then the locking mechanism 6 on the rear side moves to the specified position under the drive of the first sliding mechanism 5, and then the first electric push rod 4 contracts, and the mounting frame 3 is reset, so that the first outer ring 601 on the locking mechanism 6 returns to its original height. Then the second section of fire-fighting pipe after welding is moved toward the center position of the conveying frame 1, and at the same time, the third fire-fighting pipe is transported again by external lifting equipment and moved to the front end conveying mechanism 2 of the conveying frame 1. After grinding and trimming, the third fire-fighting pipe is abutted against the end face of the second section of fire-fighting pipe after welding. Repeating the operation can realize the spot welding of the three sections of fire-fighting pipe. Then, the three sections of fire-fighting pipe after welding are placed on the conveying mechanism 2 again, and transported by the conveying mechanism 2 at the rear end of the conveying frame 1 to gradually approach the limit plate 1501 and finally abut against the limit plate 1501, so that the two welding positions of the three sections of fire-fighting pipe can just correspond to the second welding guns 19 on the two second outer rings 16. Then, the second welding gun 19 is used to fill and weld the two spot welding positions on the three sections of fire-fighting pipe. After welding, it is transported to the designated position through the conveying mechanism 2 at the rear end.

[0046] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fire protection pipe automatic alignment welding device, comprising a conveyor frame (1), characterized in that: The conveying frame (1) is provided with two conveying mechanisms (2) symmetrically arranged front and rear, and a mounting frame (3) is provided in the middle of the conveying frame (1), a first electric push rod (4) is provided at the lower part of the mounting frame (3), a first sliding mechanism (5) is provided on the mounting frame (3), and three locking mechanisms (6) evenly distributed from front to back are also provided on the mounting frame (3), and the first sliding mechanism (5) is connected to the locking mechanism (6) at the rear end of the mounting frame (3); The locking mechanism (6) comprises a first outer ring (601), on the outer wall of which four fixed seats (602) are fixedly arranged and evenly distributed in a circumferential direction, on which a first screw rod (603) is rotatably arranged, on which a slide seat (604) is threadedly connected, and which is slidably arranged between the fixed seat (602) and the first outer ring (601), and on which ends of the four slide seats (604) close to each other are fixedly connected a slanting roller (605), on which ends of the first screw rod (603) away from the slide seat (604) are fixedly connected a first gear (606), and at the rear end of the first outer ring (601) a second gear (607) which is rotatably arranged and which is simultaneously meshed with four adjacent first gears (606) is rotatably arranged; The left and right fixing seats (602) on the first outer ring (601) are both fixedly provided with connecting columns (608); the upper ends of all the connecting columns (608) except the two connecting columns (608) on the rearmost side are fixedly connected to the mounting frame (3); the two connecting columns (608) on the rearmost side are connected to the corresponding first sliding mechanism (5); a third gear (609) is rotatably provided on the rear side of the right connecting column (608); the third gear (609) is meshed with the adjacent second gear (607).

2. The automatic alignment welding device for fire protection pipes according to claim 1 is characterized in that: A first motor is fixedly arranged on the connecting column (608) located on the right front side, and a connecting shaft (6010) is fixedly connected to the output shaft of the first motor for driving three third gears (609) on the same side to rotate simultaneously; the connecting shaft (6010) is slidably connected to the rearmost connecting column (608) and is rotationally connected to other corresponding connecting columns (608); the connecting shaft (6010) is fixedly connected to two third gears (609) except the rearmost third gear (609); and the connecting shaft (6010) and the rearmost third gear (609) are slidably connected by means of spline matching.

3. The automatic alignment welding device for fire protection pipes according to claim 1, characterized in that: The conveying mechanism (2) comprises a plurality of conveying rollers (201) rotatably arranged on the conveying frame (1), the left ends of two adjacent conveying rollers (201) being connected in transmission via a pulley group (202), and the left end of any one of the conveying rollers (201) being fixedly connected to a second motor, the second motor being fixedly arranged on the left side of the conveying frame (1).

4. The automatic alignment welding device for fire protection pipes according to claim 1, characterized in that: The first sliding mechanism (5) comprises two second screw rods (501) which are symmetrical and rotatably arranged on the upper part of the mounting frame (3); the two second screw rods (501) are both threadedly connected with a first sliding block (502); the first sliding block (502) is slidably connected to the upper part of the mounting frame (3); the first sliding block (502) is fixedly connected to a connecting column (608) corresponding to the rearmost side; the rear ends of the two second screw rods (501) are jointly connected by transmission through a sprocket group (503); and a third motor is fixedly arranged on the front side wall of the mounting frame (3); the output shaft of the third motor is fixedly connected to the front end of one of the second screw rods (501).

5. The automatic alignment welding device for fire protection pipes according to claim 1, characterized in that: The outer wall of the first outer ring (601) located in the middle is provided with four sliding holes evenly distributed in the circumferential direction, the four sliding holes are staggered with the four fixing seats (602), a first welding gun (7) is arranged in the sliding hole, a fourth gear (8) is rotatably arranged at the front end of the first outer ring (601), the fourth gear (8) is located at the front side of the adjacent second gear (607), the fourth gear (8) is fixedly connected to the four first welding guns (7), a fourth motor is also fixedly arranged on the first outer ring (601), and a fifth gear (9) meshing with the fourth gear (8) is connected to the output shaft of the fourth motor.

6. The automatic alignment welding device for fire protection pipes according to claim 1, characterized in that: Two left-right symmetrical second sliding mechanisms (10) are arranged at the middle of the upper end of the conveying frame (1), the second sliding mechanism (10) comprising a third screw rod (1001) rotatably arranged on one of the side walls of the conveying frame (1) in the front-rear direction, the third screw rod (1001) being provided with two threaded sections with opposite thread directions, and both threaded sections are threadedly connected to the second sliding block (1002), one end of the third screw rod (1001) being fixedly connected to a sixth motor, the sixth motor being fixedly arranged on the side wall of the conveying frame (1), a push plate (11) being rotatably arranged on the upper part of the second sliding block (1002), a telescopic rod (12) being commonly connected between the two push plates (11), the telescopic rod (12) being composed of two connecting rods both of which are rectangular structures, the front and rear ends of the telescopic rod (12) being fixedly connected to the two push plates (11), a seventh motor being fixedly arranged on the second sliding block (1002) located at the front side, the output shaft of the seventh motor being fixedly connected to the adjacent push plate (11).

7. The automatic alignment welding device for fire protection pipes according to claim 3 is characterized in that: The front end of the conveying frame (1) is provided with two front-to-back symmetrical grinding mechanisms (13), the grinding mechanism (13) comprising a slide rail (1301) fixedly arranged at the front end of the conveying frame (1) and located below the conveying roller (201), a fourth screw rod (1302) being rotatably arranged on the upper part of the slide rail (1301), a third slider (1303) being threadedly connected to the fourth screw rod (1302), a guide rod (1304) being slidably connected to the third slider (1303) being fixedly arranged on the slide rail (1301), an eighth motor being fixedly arranged on any side wall in the left and right directions of the slide rail (1301), an output shaft of the eighth motor being fixedly connected to the fourth screw rod (1302), a second electric push rod (1305) being arranged on the third slider (1303), a grinder (1306) being fixedly connected to the telescopic end of the second electric push rod (1305).

8. The automatic alignment welding device for fire protection pipes according to claim 3 is characterized in that: The front and rear ends of the upper part of the conveying frame (1) are both provided with a clamping mechanism (14), the clamping mechanism (14) comprising two connecting frames (1401) fixedly arranged on the upper part of the conveying frame (1) and symmetrically arranged on the left and right, the connecting frames (1401) being arranged above the conveying roller (201), the connecting frames (1401) being fixedly arranged with a third electric push rod (1402), the telescopic end of the third electric push rod (1402) being fixedly connected with a clamping plate (1403).

9. The automatic alignment welding device for fire protection pipes according to claim 8, characterized in that: A limiting mechanism (15) is also provided on the upper part of the conveying frame (1), and the limiting mechanism (15) comprises a limiting plate (1501) rotatably provided on the upper part of the rear end of the conveying frame (1); a ninth motor is fixedly provided on the upper part of the rear end of the conveying frame (1); the output shaft of the ninth motor is fixedly connected to the right end of the limiting plate (1501); a stopper (1502) is fixedly provided on the upper part of the conveying frame (1) at a position corresponding to the left end of the limiting plate (1501); and the stopper (1502) is movably abutted against the limiting plate (1501).

10. The automatic alignment welding device for fire protection pipes according to claim 9, characterized in that: The rear end of the conveying frame (1) is fixedly provided with two second outer rings (16) arranged in front and back, the limiting plate (1501) is located behind the rear second outer ring (16), the clamping mechanism (14) located at the rear side of the conveying frame (1) is arranged between the two second outer rings (16), the rear sides of the two second outer rings (16) are rotatably provided with a sixth gear (17) and a seventh gear (18) meshing with each other, the sixth gear (17) is concentric with the corresponding second outer ring (16), and the inner ring of the sixth gear (17) is fixedly connected to a second welding gun (19), and the front side of the second outer ring (16) is fixedly provided with a fifth motor, and the output shaft of the fifth motor is fixedly connected to the seventh gear (18).

Images