A prefabricated welding device for pressure pipeline of water conservancy and hydropower engineering

Abstract

The application discloses a prefabricated welding device for pressure pipelines of water conservancy and hydropower projects, and relates to the technical field of pipeline welding, which comprises a positioning table and a welding gun component, a first mounting ring and a second mounting ring are respectively arranged in first and second moving frames, the welding gun component is arranged at one end of a welding support arm, a plurality of first friction wheels are arranged on the inner sides of the first and second mounting rings, rotating mechanisms are arranged in the first and second mounting rings, a limiting mechanism is arranged on the inner side of the second mounting ring, and a rotating mechanism is arranged on one side of the first moving frame. The first and second limiting wheels are arranged to facilitate the limiting of the two sides of the flange body, the flange body can be completely limited and fixed under the action of the first friction wheels, the flange body can be quickly installed, the construction risk is reduced, and the two-section pressure pipeline body can be welded by the cooperation of the first and second mounting rings.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline welding, in particular to a prefabricated welding device for pressure pipelines in water conservancy and hydropower engineering. Background Art

[0002] A welding device refers to a process equipment that connects two metal parts into a whole through high-temperature melting or pressure, and is widely used in the field of industrial manufacturing. In water conservancy and hydropower projects, pressure pipes are the core components for conveying water flow, and their connection reliability directly affects the safety of the project and its service life. At present, the connection between pressure pipes mainly adopts flange connection. The key to welding quality lies in ensuring the strict coaxiality of the pipe and the flange sleeve to avoid problems such as sealing failure or stress concentration due to axis deviation during subsequent installation. In the existing technology, the conventional process relies on manual operation: workers need to hold the flange and the pipe for preliminary alignment, and then maintain the position through a temporary fixing device, and then perform circumferential welding. Due to the limited matching accuracy of the flange and the pipe size, especially in mass production, the small tolerance between the inner diameter of the flange and the outer diameter of the pipe can easily lead to alignment deviation, and repeated adjustments are required to meet the coaxial requirements.

[0003] Authorization publication number CN116618908B discloses an automatic pipeline welding device that automatically aligns the steel pipe and flange using a centering mechanism and employs a rotary drive unit to continuously weld the circumferential seam, significantly improving welding uniformity and efficiency. This device secures the flange using a clamp, which, in conjunction with a rotating platform, drives the workpiece in synchronous motion, eliminating deviations caused by manual intervention. However, in practice, this technology presents a cumbersome flange securing process, requiring the operator to manually support the flange or rely on external auxiliary clamps for pre-positioning. The clamp can only be fully tightened before removing the force. This process not only increases operational complexity but also poses safety risks. For example, if the flange slips before clamping is complete, it could damage equipment or personnel. Furthermore, the clamp design lacks dimensional adaptability, limiting its clamping range to a specific flange thickness and making it incompatible with workpieces of varying thicknesses. Adjusting clamping parameters often requires replacing clamp components or recalibrating the equipment, reducing production flexibility and making it difficult to meet the diverse flange specifications required in water conservancy projects.

[0004] Based on this, a prefabricated welding device for pressure pipes in water conservancy and hydropower projects is now provided, which can eliminate the disadvantages of existing devices. Summary of the Invention

[0005] The object of the present invention is to provide a prefabricated welding device for pressure pipes in water conservancy and hydropower projects, so as to solve the problem in the background art that it is inconvenient to quickly position the flange.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The utility model provides a kind of water conservancy and hydropower engineering pressure pipeline prefabricated welding device, including positioning table and welding torch component, the positioning table both sides are equipped with the first moving frame, the first moving frame is equipped with the second moving frame away from the positioning table side, the first moving frame and the second moving frame inside are equipped with the first mounting ring and the second mounting ring respectively, the first mounting ring and the second mounting ring are respectively equipped with the second connecting frame and fixed shaft symmetrically, the fixed shaft is rotatably equipped with the first connecting frame, the first connecting frame is hingedly equipped with welding support arm on one, the welding torch component is installed in welding support arm one end, the first mounting ring and the second mounting ring inside are equipped with the first friction wheel in circle array, the first friction wheel is rotatably equipped with the first rotating arm, the first mounting ring and the second mounting ring inside are equipped with the rotating mechanism for driving the first friction wheel simultaneously rotating, the second mounting ring inside is equipped with the limiting mechanism for limiting the installation position of flange body, the first moving frame side is equipped with the rotating mechanism for driving pressure pipeline body rotation.

[0008] Based on the above technical solutions, the present application also provides the following optional technical solutions:

[0009] In an alternative, a fifth gear is fixedly arranged on one of the fixed shafts, a sixth gear is meshingly arranged on the fifth gear, the sixth gear is fixedly arranged on the output end of a second motor, the second motor is fixedly arranged on the upper end of one of the first connecting arms, walking wheels are symmetrically arranged on the bottom ends of the first moving frame and the second moving frame, the walking wheels are rollingly arranged on the upper ends of the guide passages in the inside of the walking chassis, two walking chassis are respectively arranged on the two sides of the positioning table, the second motor is electrically connected with the control box, and the control box is fixedly arranged on one side of the positioning table.

[0010] In an alternative, chain belts are symmetrically arranged on the inside of the first moving frame and the second moving frame, mounting boxes are arranged in the inside of the chain belts, driving rollers and transmission rollers are respectively arranged at the two ends of the mounting boxes, rotating shafts at the two ends of the driving rollers and the transmission rollers are rotatably arranged in rotating holes in the inside of the mounting boxes, the first connecting arms and the second connecting arms are respectively slidably arranged in the inside of the second moving frame and the first moving frame, clamping grooves are arranged at positions corresponding to the chain belts of the first connecting arms and the second connecting arms, connecting blocks are fixedly arranged on one side of the clamping grooves, the connecting blocks are fixedly connected with the chain belts, first worms are fixedly arranged on the rotating shafts at the one ends of the driving rollers, first worms are meshingly arranged on the first worms, first rotating plates are rotatably arranged at the two ends of the first worms, the first rotating plates are fixedly arranged on the upper ends of the first moving frame and the second moving frame, transmission shafts are fixedly arranged between the coaxial first worms, one end of one of the first worms is fixedly connected with the output end of a first motor, the first motor is fixedly arranged on the upper ends of the first moving frame and the second moving frame, and the first motor is electrically connected with the control box.

[0011] In an optional solution: the rotating mechanism includes a first gear ring, a first gear ring is fixedly provided at one end of the first rotating arm, a receiving groove is provided on the inner side of the first mounting ring and the second mounting ring at a position corresponding to the position of the first rotating arm, and one end of the first rotating arm is hingedly provided in the receiving groove, a first gear is meshed on the first gear ring, the first gear is rotatably provided inside the first mounting ring and the second mounting ring, a first gear ring segment is meshed on the first gear, and several first gear ring segments are fixed on the inner side of the mounting ring, the mounting ring is rotatably provided in the rotating groove inside the first mounting ring and the second mounting ring, a second gear ring segment is fixed on the outer side of the mounting ring, and a second gear ring segment is meshed on the second gear ring segment, a second rotating plate is rotatably provided on the rotating shaft at both ends of the second gear, a second worm gear is fixed on the rotating shaft at one end of the second gear, a second worm is meshed on the second worm gear, a third rotating plate is rotatably provided on the rotating shaft at both ends of the second worm, the second rotating plate and the third rotating plate are both fixed on the first mounting ring and the second mounting ring, a rotating shaft at one end of the second worm is fixedly connected to the output end of the third motor, and the third motor is fixed on the first mounting ring and the second mounting ring.

[0012] The cam is secured to the first and second ends of the second rotating frame, and the cam is secured to the second end of the second rotating frame with respect to the first and second ends of the second rotating frame. There is a connecting plate, a guide slide groove is provided inside the second mounting ring corresponding to the position of the rack, and a guide slide rod is slidably provided on the connecting plate, and the guide slide rod is fixed in the guide slide groove, and a first return spring is provided between one side of the connecting plate and one end of the guide slide groove, the connecting plate on the same side of the first limiting wheel is fixedly connected to the first linkage ring, and the connecting plate on the same side of the second limiting wheel is fixedly connected to the second adjusting ring, the second adjusting ring is fixedly connected to the output ends of the two electric cylinders respectively, and the electric cylinders are fixedly provided on the second mounting ring, and a fixing component for fixing the working position of the first linkage ring is provided on one side of the second mounting ring, and an adjusting component for adjusting the distance between the first limiting wheel and the second limiting wheel is provided inside the adjusting tube.

[0013] In an optional solution: the fixing assembly includes a limit frame, and the two limit frames are symmetrically arranged on one side of the first linkage ring. A limit hole is provided on one side of the limit frame, and a stop rod is slidably provided in the limit hole. The stop rod is slidably provided inside the fixed tube, and the fixed tube is fixed on one side of the second mounting ring. A second return spring is provided between one end of the stop rod and one end inside the fixed tube, and a shift plate is fixedly provided at one end of the stop rod.

[0014] In an optional solution: the adjustment assembly includes an adjustment screw, an adjustment screw is rotatably provided inside the adjustment tube, the sliding plate is threadedly connected to the adjustment screw through a threaded hole, a friction block is fixedly provided at one end of the adjustment screw, a stop block is tightly attached to the friction block, the stop block is rotatably provided at one end of the screw, the screw is set in a threaded hole at one end of the connecting tube, the connecting tube is fixed on one side of the adjustment tube, and the stop block is slidably provided in the connecting tube.

[0015] In an optional scheme: the rotating mechanism includes a bearing, a first fixing ring is fixedly provided on the inner ring of the bearing, the first fixing ring is fixedly provided on one side of the first mounting ring, a second fixing ring is fixedly provided on the outer ring of the bearing, a plurality of extension plates are fixedly provided on one side of the second fixing ring, threaded holes are provided on the extension plates, threaded rods are fitted in the threaded holes, a close-fitting plate is rotatably provided at one end of the threaded rods, a third gear ring is fixedly provided on the second fixing ring, a seventh gear is meshed on the third gear ring, the seventh gear is fixed at the output end of the fifth motor, and the fifth motor is fixed on the first mounting ring.

[0016] In an optional solution: a second friction wheel is provided on the inner side of the second mounting ring, and the array angle between the second friction wheel and two adjacent first friction wheels is equal to the array angle between the remaining first friction wheels; a second rotating arm is rotatably provided on the outer side of the second friction wheel, and the second rotating arm is hinged in the receiving groove; a first gear ring is fixed at one end of the second rotating arm, and a first gear is meshed on the first gear ring; the first gear is rotatably arranged inside the second mounting ring, and a first gear ring segment is meshed on the first gear; the first gear ring segment is fixed on the inner side of the mounting ring, and five first gear ring segments are arranged in a circumferential array; an annular groove is provided on the second friction wheel, and an eighth gear is fixed inside the annular groove; a third gear is rotatably provided on the rotating shaft at one end of the second rotating arm; the third gear and the eighth gear are connected by a synchronous toothed belt; a fourth gear is meshed on the third gear; the fourth gear is rotatably provided in the mounting groove inside the second mounting ring; the rotating shaft at one end of the fourth gear extends to the outside of the second mounting ring; the rotating shaft at one end of the fourth gear is fixedly connected to the output end of the fourth motor; and the fourth motor is fixed on one side of the second mounting ring.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention provides a plurality of first friction wheels on the inner sides of the first mounting ring and the second mounting ring, so as to facilitate clamping and fixing the pressure pipe body and the flange body, and provides a plurality of first limiting wheels and second limiting wheels on the inner side of the second mounting ring, so as to facilitate limiting the two sides of the flange body. Under the action of the first limiting wheel, the second limiting wheel and the first friction wheel, the flange body can be completely limited and fixed to prevent the flange body from being offset, and the second mounting ring can be rotated 90 degrees when the flange body is installed, so that the axis of the flange body is perpendicular to the ground during installation, thereby facilitating rapid installation of the flange body and reducing construction risks.

[0019] 2. According to the present invention, the first limiting wheel and the second limiting wheel can both rotate 90 degrees, so that the second mounting ring can fix the flange body, and can also cooperate with the first mounting ring to weld the two sections of the pressure pipe body. When the welding gun component is in use, the inner and outer sides of the welding point of the flange body and the pressure pipe body can be welded. By providing a rotating mechanism and a second friction wheel, the pressure pipe body and the flange body can be driven to rotate respectively, making it convenient to rotate during welding, thereby increasing the practicality of the pressure pipe prefabricated welding device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 This is a schematic diagram of the welding state of the flange body and the pressure pipe body of the present invention.

[0022] Figure 3 This is a schematic structural diagram of the first mobile rack and the second mobile rack of the present invention.

[0023] Figure 4 This is a schematic diagram of the installation of the fourth motor of the present invention.

[0024] Figure 5 This is a schematic diagram of the rotation state of the second mounting ring of the present invention.

[0025] Figure 6 This is a schematic diagram of the installation of the first rotating arm of the present invention.

[0026] Figure 7 This is a schematic diagram of the installation of the first gear ring segment and the second gear ring segment of the present invention.

[0027] Figure 8 This is a schematic diagram of the installation of the synchronous toothed belt of the present invention.

[0028] Figure 9 This is a schematic diagram of the installation of the first limiting wheel and the second limiting wheel of the present invention.

[0029] Figure 10 This is a schematic diagram of the internal structure of the regulating tube of the present invention.

[0030] Figure 11 This is a schematic diagram of the structure of the stop rod and the limit frame of the present invention.

[0031] Figure 12 This is a schematic diagram of the cling plate structure of the present invention.

[0032] Figure 13 This is a schematic diagram of the installation of the second gear and the second worm gear of the present invention.

[0033] Figure 14 This is a schematic diagram of the installation of the first worm wheel and the first worm of the present invention.

[0034] Figure numerals: 11 positioning platform, 12 first moving frame, 13 first mounting ring, 14 second moving frame, 15 second mounting ring, 16 walking frame, 17 first connecting frame, 18 chain belt, 19 mounting box, 20 first worm gear, 21 first worm, 22 first motor, 23 second motor, 24 first friction wheel, 25 first rotating arm, 26 second friction wheel, 27 second rotating arm, 28 first gear ring, 29 first gear, 30 first gear ring segment, 31 second gear ring segment, 32 mounting ring, 33 second gear, 34 second worm gear, 35 second worm, 36 first gear Three electric motors, 37 synchronous toothed belt, 38 third gear, 39 fourth gear, 40 fourth motor, 41 first limiting wheel, 42 third rotating arm, 43 rack, 44 first return spring, 45 first linkage ring, 46 stop rod, 47 limiting frame, 48 second limiting wheel, 49 adjusting screw, 50 stop block, 51 screw, 52 adjusting tube, 53 second adjusting ring, 54 electric cylinder, 55 close plate, 56 threaded rod, 57 bearing, 58 third gear ring, 59 fifth motor, 60 welding gun components, 61 control box, 62 flange body, 63 pressure pipe body. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. Example 1

[0036] In one embodiment, Figures 1-14As shown, a prefabricated welding device for pressure pipes of water conservancy and hydropower projects includes a positioning platform 11 and a welding gun component 60, wherein the first movable frame 12 is provided on both sides of the positioning platform 11, and the first movable frame 12 is provided on the side away from the positioning platform 11. The first movable frame 12 is provided with a second movable frame 14, and the first movable frame 12 and the second movable frame 14 are respectively provided with a first mounting ring 13 and a second mounting ring 15 inside. The first mounting ring 13 and the second mounting ring 15 are respectively symmetrically provided with a second connecting frame and a fixed shaft, and the fixed shaft is rotatably provided with a first connecting frame 17, and a welding support arm is hingedly provided on one of the first connecting frames 17, and the welding gun component 60 is installed at one end of the welding support arm, and the inner sides of the first mounting ring 13 and the second mounting ring 15 are provided with a plurality of first friction wheels 24 in a circumferential array, and the first friction wheels 24 are rotatably provided with a plurality of first friction wheels 24. There is a first rotating arm 25, and the first mounting ring 13 and the second mounting ring 15 are both provided with a rotating mechanism that drives several first friction wheels 24 to rotate simultaneously. The inner side of the second mounting ring 15 is provided with a limiting mechanism for limiting the installation position of the flange body 62. One side of the first movable frame 12 is provided with a rotating mechanism that drives the pressure pipe body 63 to rotate. The rotating mechanism facilitates driving the several first rotating arms 25 to rotate a fixed angle, so that the several first friction wheels 24 clamp and fix the flange body 62 and the pressure pipe body 63. The limiting mechanism facilitates limiting the two sides of the flange body 62, thereby limiting the flange body 62 for rapid installation and positioning. The rotating mechanism facilitates driving the pressure pipe body 63 to rotate, so that the welding gun component 60 can perform circumferential welding on the connection between the flange body 62 and the pressure pipe body 63;

[0037] A fifth gear is fixed on one of the fixed shafts, and a sixth gear is meshed on the fifth gear. The sixth gear is fixed on the output end of the second motor 23. The second motor 23 is fixed on the upper end of a first connecting frame 17. The bottom ends of the first mobile frame 12 and the second mobile frame 14 are symmetrically provided with walking wheels, and the walking wheels are rolled on the upper end of the guide aisle inside the walking frame 16. The two walking frames 16 are respectively provided on both sides of the positioning platform 11. The second motor 23 is electrically connected to the control box 61, and the control box 61 is fixed on one side of the positioning platform 11. When in use, when the pressure pipe needs to be adjusted When the flange body 62 is welded at both ends of the pressure pipe body 63, the pressure pipe body 63 is placed in the upper limit groove of the positioning platform 11 through the external lifting components, and then the two first mobile frames 12 are moved so that the end of the pressure pipe body 63 passes through the middle of the first mounting ring 13, and the second motor 23 drives the second mounting ring 15 to rotate 90 degrees, so that the staff can place the flange body 62 in the middle of the second mounting ring 15 for fixing, and then the second mounting ring 15 is rotated to be coaxial with the first mounting ring 13, and the second mobile frame 14 drives the flange body 62 to move, so that the flange body 62 is in close contact with the end of the pressure pipe body 63.

[0038] The first and second connecting frames are slidably mounted on the second moving frame 14 and the first moving frame 12, and the first connecting frame 17 and the second connecting frame are respectively provided with a clamping groove at the position corresponding to the position of the second moving frame 14 and the first moving frame 12, and the first connecting frame 17 and the second connecting frame are respectively provided with a connecting block at one side of the clamping groove, and the connecting block is fixedly connected to the chain belt 18. A first worm gear 20 is fixed on the rotating shaft at one end of the driving roller, and a first worm 21 is meshed on the first worm gear 20. A first rotating plate is rotatably mounted on both ends of the first worm gear 21, and the first rotating plate is fixed on the upper ends of the first moving frame 12 and the second moving frame 14. A transmission shaft is fixed between the coaxial first worm gears 21, and one end of the first worm gear 21 is fixedly connected to the output end of the first motor 22. The first motor 22 is fixedly arranged on the upper ends of the first movable frame 12 and the second movable frame 14. The first motor 22 is electrically connected to the control box 61. During use, when it is necessary to make the first mounting ring 13 and the second mounting ring 15 coaxial with the pressure pipe body 63, the first motor 22 on the upper ends of the first movable frame 12 and the second movable frame 14 is started, and the two first motors 22 respectively drive the two first worm gears 21 to rotate, and the first worm gear 21 engages with the first worm gear 20 to drive the driving roller to rotate, and the driving roller cooperates with the transmission roller to drive the chain belt 18 to rotate, and the chain belt 18 drives the first mounting ring 13 and the second mounting ring 15 to move through the first connecting frame 17 and the second connecting frame, so that the first mounting ring 13 and the second mounting ring 15 are concentrically arranged with the pressure pipe body 63.

[0039] The rotating mechanism includes a first gear ring 28, one end of the first rotating arm 25 is fixed with a first gear ring 28, the first mounting ring 13 and the second mounting ring 15 are provided with a receiving groove at the inner side corresponding to the position of the first rotating arm 25, one end of the first rotating arm 25 is hingedly set in the receiving groove, the first gear ring 28 is meshed with a first gear 29, the first gear 29 is rotatably set inside the first mounting ring 13 and the second mounting ring 15, the first gear 29 is meshed with a first gear ring segment 30, and a plurality of the first gear ring segments 30 are fixed. The mounting ring 32 is fixed on the inner side of the mounting ring 32, and the mounting ring 32 is rotatably arranged in the internal rotating groove of the first mounting ring 13 and the second mounting ring 15. A second gear ring segment 31 is fixed on the outer side of the mounting ring 32, and a second gear 33 is meshed on the second gear ring segment 31. A second rotating plate is rotatably provided on the rotating shaft at both ends of the second gear 33. A second worm gear 34 is fixed on the rotating shaft at one end of the second gear 33, and a second worm 35 is meshed on the second worm gear 34. A third rotating plate is rotatably provided on the rotating shaft at both ends of the second worm 35. The second rotating plate and the third rotating plate are both fixedly mounted on the first mounting ring 13 and the second mounting ring 15. The rotating shaft at one end of the second worm 35 is fixedly connected to the output end of the third motor 36. The third motor 36 is fixedly mounted on the first mounting ring 13 and the second mounting ring 15. When in use, when it is necessary to clamp the flange body 62 and the pressure pipe body 63, the output end of the third motor 36 drives the second worm 35 to rotate, and the second worm 35 engages with the second worm wheel 34 to drive the second gear 33 to rotate, and the second gear 33 engages with the second gear ring segment 31 to drive The mounting ring 32 rotates, and the mounting ring 32 drives the plurality of first gear ring segments 30 to rotate. The first gear ring segments 30 engage with the first gear ring 28 through the first gear 29, driving the plurality of first rotating arms 25 to deflect a fixed angle at the same time, so that the plurality of first friction wheels 24 are in close contact with the outer sides of the flange body 62 and the pressure pipe body 63, thereby clamping and fixing the flange body 62 and the pressure pipe body 63. An anti-slip layer is provided on the outer sides of the first friction wheels 24, so that when the flange body 62 and the pressure pipe body 63 rotate, the first friction wheels 24 rotate synchronously.

[0040] The limiting mechanism includes a first limiting wheel 41 and a second limiting wheel 48, and a plurality of first limiting wheels 41 and a second limiting wheel 48 are arranged in an array at both ends of the inner side of the second mounting ring 15. The second limiting wheel 48 is arranged at one end close to the first movable frame 12, and a first rotating frame and a second rotating frame are respectively rotatably provided on the outer sides of the first limiting wheel 41 and the second limiting wheel 48. A sliding plate is provided at the end of the second rotating frame, and the sliding plate is slidably arranged inside the adjusting tube 52. A third rotating arm 42 is fixedly provided at one end of the adjusting tube 52 and one end of the first rotating frame. Positioning grooves are provided at both ends of the second mounting ring 15 corresponding to the positions of the third rotating arm 42, and a fourth gear ring is fixed at one end of the third rotating arm 42. A rack 43 is meshed on the fourth gear ring, and a connecting plate is fixed on one side of the rack 43. A guide groove is provided inside the second mounting ring 15 at a position corresponding to the position of the rack 43, and a guide slide rod is slidably provided on the connecting plate, and the guide slide rod is fixed in the guide groove. A first return spring 44 is provided between one side of the connecting plate and one end of the guide groove, and the connecting plates on the same side of the first limiting wheel 41 are fixedly connected to the first linkage ring 45, and the connecting plates on the same side of the second limiting wheel 48 are fixedly connected to the second adjusting ring 53, and the second adjusting ring 53 is fixedly connected to the output ends of the two electric cylinders 54 respectively, and the electric cylinders 54 are fixedly provided on the second mounting ring 15, and a fixing component for fixing the working position of the first linkage ring 45 is provided on one side of the second mounting ring 15, and an adjusting component for adjusting the distance between the first limiting wheel 41 and the second limiting wheel 48 is provided inside the adjusting tube 52.

[0041] When the second mounting ring 15 is fixed before the flange body 62 is welded, the first linkage ring 45 is pulled to slide by the two limiting frames 47, and the first linkage ring 45 simultaneously drives several racks 43 to slide, and the rack 43 engages with the fourth gear ring to drive the third rotating arm 42 to rotate, and the rack 43 drives the first limiting wheel 41 to rotate. When the stop rod 46 is inserted into the limiting hole, the first limiting wheel 41 rotates 90 degrees, thereby fixing the first limiting wheel 41, and then the second motor 23 drives the second mounting ring 1 The flange body 62 is then placed on the plurality of first limiting wheels 41 and the third motor 36 is started to rotate the plurality of first rotating arms 25 inside the second mounting ring 15. The first rotating arms 25 drive the first friction wheel 24 to rotate and clamp the flange body 62. The electric cylinder 54 is then started. The output end of the electric cylinder 54 drives the second adjusting ring 53 to slide, causing the second limiting wheel 48 to rotate 90 degrees. The plurality of second limiting wheels 48 are in close contact with the other side of the flange body 62, thereby fixing the flange body 62. After the fixing is completed, the second mounting ring 15 is rotated to the initial position. The second moving frame 14 then drives the flange body 62 to move so that the flange body 62 is in close contact with one end of the pressure pipe body 63. The welding is then performed using the welding gun assembly 60. It is worth noting that the welding gun assembly 60 and the welding support arm are both existing components, so that the welding gun assembly 60 can weld both the outside and the inside of the pressure pipe body 63.

[0042] The adjusting assembly includes an adjusting screw 49, and the adjusting tube 52 is internally provided with an adjusting screw 49, and the sliding plate is threadedly connected to the adjusting screw 49 through a threaded hole. A friction block is fixed at one end of the adjusting screw 49, and a stop block 50 is tightly attached to the friction block. The stop block 50 is rotatably arranged at one end of a screw 51, and the screw 51 is arranged in a threaded hole at one end of the connecting tube. The connecting tube is fixed on one side of the adjusting tube 52, and the stop block 50 is slidably arranged in the connecting tube. When in use, when it is necessary to clamp and fix the flange bodies 62 of different thicknesses, Use a tool to turn the screw 51 so that the screw 51 drives the stop block 50 to move, and the stop block 50 disengages from the friction block. Then use a tool to turn the adjusting screw 49. Under the action of the thread, the sliding plate drives the second limiting wheel 48 to move, thereby adjusting the distance between the first limiting wheel 41 and the second limiting wheel 48. At the same time, if it is necessary to weld the two pressure pipe bodies 63, the first limiting wheel 41 and the second limiting wheel 48 are rotated to the initial position, so that the second mounting ring 15 has the same function as the first mounting ring 13, and respectively clamps the two sections of the pressure pipe body 63.

[0043] The rotating mechanism includes a bearing 57, the inner ring of the bearing 57 is fixed with a first fixing ring, the first fixing ring is fixed on one side of the first mounting ring 13, the outer ring of the bearing 57 is fixed with a second fixing ring, and one side of the second fixing ring is fixed with several extension plates, each of the extension plates is provided with a threaded hole, each of the threaded holes is matched with a threaded rod 56, one end of the threaded rod 56 is rotatably provided with a close-fitting plate 55, the second fixing ring is fixed with a third gear ring 58, the third gear ring 58 is meshed with a seventh gear, the seventh gear is fixed at the output end of the fifth motor 59, the fifth motor The machine 59 is fixed on the first mounting ring 13. During use, when the pressure pipe body 63 needs to be welded in a full circle, the threaded rod 56 is rotated so that the threaded rod 56 drives the close-fitting plate 55 to move, and the close-fitting plate 55 is close to the pressure pipe body 63, thereby increasing the contact area between the close-fitting plate 55 and the pressure pipe body 63. Then the fifth motor 59 drives the seventh gear to rotate, and the seventh gear engages with the third gear ring 58 to drive several close-fitting plates 55 to rotate. The close-fitting plates 55 drive the pressure pipe body 63 to rotate. At the same time, the axis of the first friction wheel 24 is parallel to the axis of the pressure pipe body 63, so that the pressure pipe body 63 can be easily rotated. Example 2

[0044] The difference from Example 1 is that a second friction wheel 26 is provided on the inner side of the second mounting ring 15, and the array angle between the second friction wheel 26 and the two adjacent first friction wheels 24 is equal to the array angle between the remaining first friction wheels 24. A second rotating arm 27 is rotatably provided on the outer side of the second friction wheel 26, and the second rotating arm 27 is hinged in the storage groove. A first gear ring 28 is fixed at one end of the second rotating arm 27, and a first gear 29 is meshed on the first gear ring 28. The first gear 29 is rotatably arranged inside the second mounting ring 15, and a first gear ring segment 30 is meshed on the first gear 29. The first gear ring segment 30 is fixed on the inner side of the mounting ring 32, and the five first gear ring segments 30 are arranged in a circumferential array. An annular groove is provided on the second friction wheel 26, and an eighth gear is fixed on the inner side of the annular groove. A third gear 38 is rotatably provided on the rotating shaft at one end of the second rotating arm 27, and the third gear 38 is connected to the eighth gear through a synchronous toothed belt 37. The third gear 38 is meshed with a fourth gear The fourth gear 39 is rotatably mounted in the mounting groove inside the second mounting ring 15. One end of the rotating shaft of the fourth gear 39 extends to the outside of the second mounting ring 15. One end of the rotating shaft of the fourth gear 39 is fixedly connected to the output end of the fourth motor 40. The fourth motor 40 is fixedly mounted on one side of the second mounting ring 15. During use, when the mounting ring 32 drives the first gear ring segment 30 to rotate, the second rotating arm 27 and the first rotating arm 25 rotate synchronously by a fixed angle, so that the first friction wheel 24 and the second friction wheel 26 are both in close contact with the outer side of the flange body 62. When it is necessary to make the flange body 62 and the pressure pipe body 63 rotate synchronously, the fourth motor 40 is started, and the output end of the fourth motor 40 drives the fourth gear 39 to rotate. The fourth gear 39 meshes with the third gear 38. The third gear 38 drives the second friction wheel 26 to rotate through the synchronous toothed belt 37. The second friction wheel 26 drives the flange body 62 and the pressure pipe body 63 to rotate synchronously, thereby facilitating the welding gun component 60 to perform circumferential welding on the welding point of the flange body 62 and the pressure pipe body 63.

[0045] The above embodiment discloses a prefabricated welding device for a pressure pipe of a water conservancy and hydropower project, wherein when it is necessary to weld the flange bodies 62 at both ends of the pressure pipe body 63, the pressure pipe body 63 is placed in the limiting groove at the upper end of the positioning platform 11 by an external lifting component, and then the second motor 23 drives the second mounting ring 15 to rotate 90 degrees, so that the end where the second limiting wheel 48 is located faces upward, and then the flange body 62 is placed on a plurality of first limiting wheels 41, and the third motor 36 is started to rotate a plurality of first rotating arms 25 and a second rotating arm 27 inside the second mounting ring 15, the first rotating arm 25 drives the first friction wheel 24 to rotate, and the second rotating arm 27 drives the second friction wheel 26 to rotate, thereby clamping and fixing the flange body 62, and then the electric cylinder 54 is started, and the output end of the electric cylinder 54 drives the second adjusting ring 53 to slide, so that the second limiting wheel 48 rotates 90 degrees, and the plurality of second limiting wheels 48 are in close contact with the other side of the flange body 62, thereby fixing the flange body 62, and after the fixing is completed, the second mounting ring 15 is rotated to the initial position;

[0046] Start the first motor 22 at the upper end of the first movable frame 12 and the second movable frame 14, and the two first motors 22 respectively drive the two first worms 21 to rotate, and the first worm 21 engages with the first worm gear 20 to drive the driving roller to rotate, and the driving roller cooperates with the transmission roller to drive the chain belt 18 to rotate, and the chain belt 18 drives the first mounting ring 13 and the second mounting ring 15 to move through the first connecting frame 17 and the second connecting frame, so that the first mounting ring 13 and the second mounting ring 15 are arranged concentrically with the pressure pipe body 63, and then the two first movable frames 12 move so that the end of the pressure pipe body 63 passes through the middle of the first mounting ring 13, and the second movable frame 14 drives the flange body 62 to move so that the flange body 62 is tightly attached to one end of the pressure pipe body 63. When the pressure pipe body 63 needs to be welded in a full circle, the threaded rod 56 is rotated so that the threaded rod 56 drives the tight-fitting plate 55 moves, the close plate 55 is in close contact with the pressure pipe body 63, increasing the contact area between the close plate 55 and the pressure pipe body 63, and then the fifth motor 59 drives the seventh gear to rotate, and the seventh gear is engaged with the third gear ring 58 to drive several close plates 55 to rotate, and the close plates 55 drive the pressure pipe body 63 to rotate. At the same time, the fourth motor 40 is started, and the output end of the fourth motor 40 drives the fourth gear 39 to rotate, and the fourth gear 39 is engaged with the third gear 38. The third gear 38 drives the second friction wheel 26 to rotate through the synchronous toothed belt 37, and the second friction wheel 26 drives the flange body 62 and the pressure pipe body 63 to rotate synchronously, thereby facilitating the welding gun component 60 to perform circumferential welding on the welding point of the flange body 62 and the pressure pipe body 63, and the welding gun component 60 can weld the inside and outside of the flange body 62 under the action of the welding support arm.

[0047] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A prefabricated welding device for a pressure pipe of a water conservancy and hydropower project, comprising a positioning platform (11) and a welding gun component (60), wherein both sides of the positioning platform (11) are equipped with a first movable frame (12), and the side of the first movable frame (12) away from the positioning platform (11) is equipped with a second movable frame (14), and the first movable frame (12) and the second movable frame (14) are respectively equipped with a first mounting ring (13) and a second mounting ring (15), and the first mounting ring (13) and the second mounting ring (15) are respectively symmetrically provided with a second connecting frame and a fixed shaft, and the fixed shaft is rotatably provided with a first connecting frame (17), characterized in that: A welding arm is hingedly provided on the first connecting frame (17), the welding gun component (60) is installed at one end of the welding arm, a plurality of first friction wheels (24) are provided in a circumferential array on the inner sides of the first mounting ring (13) and the second mounting ring (15), a first rotating arm (25) is rotatably provided on the first friction wheel (24), a rotating mechanism for driving the plurality of first friction wheels (24) to rotate simultaneously is provided inside the first mounting ring (13) and the second mounting ring (15), a limiting mechanism for limiting the installation position of the flange body (62) is provided on the inner side of the second mounting ring (15), and a rotating mechanism for driving the pressure pipe body (63) to rotate is provided on one side of the first movable frame (12); A fifth gear is fixed on one of the fixed shafts, a sixth gear is meshed with the fifth gear, and the sixth gear is fixed on the output end of the second motor (23). The second motor (23) is fixed on the upper end of a first connecting frame (17). The bottom ends of the first mobile frame (12) and the second mobile frame (14) are symmetrically provided with running wheels, and the running wheels are rollingly arranged on the upper end of the inner guide aisle of the walking frame (16). The two walking frames (16) are respectively arranged on both sides of the positioning platform (11). The second motor (23) is electrically connected to the control box (61), and the control box (61) is fixed on one side of the positioning platform (11); The first movable frame (12) and the second movable frame (14) are symmetrically provided with chain belts (18) on the inside, and the chain belts (18) are both provided with mounting boxes (19) on the outside. The two ends of the mounting box (19) are respectively provided with driving rollers and transmission rollers. The rotating shafts at both ends of the driving rollers and transmission rollers are both rotatably arranged in the rotating holes inside the mounting box (19). The first connecting frame (17) and the second connecting frame are respectively slidably arranged on the inside of the second movable frame (14) and the first movable frame (12). The first connecting frame (17) and the second connecting frame are both provided with clamping grooves at positions corresponding to the chain belts (18). A connecting block is fixed on one side of the clamping groove. The connecting block is fixed to the chain belts (18). The first worm gear (20) is fixedly provided on the rotating shaft at one end of the driving roller, the first worm gear (20) is meshed with a first worm (21), and first rotating plates are rotatably provided at both ends of the first worm (21), and the first rotating plates are fixedly provided on the upper ends of the first movable frame (12) and the second movable frame (14). A transmission shaft is fixedly provided between the two coaxial first worms (21), and one end of the first worm (21) is fixedly connected to the output end of the first motor (22), and the first motor (22) is fixedly provided on the upper ends of the first movable frame (12) and the second movable frame (14). The first motor (22) is electrically connected to the control box (61); The limiting mechanism includes a first limiting wheel (41) and a second limiting wheel (48), and a plurality of first limiting wheels (41) and second limiting wheels (48) are arranged in an array at both ends of the inner side of the second mounting ring (15). The second limiting wheel (48) is arranged at one end close to the first movable frame (12). The first rotating frame and the second rotating frame are rotatably arranged on the outer sides of the first limiting wheel (41) and the second limiting wheel (48). The end of the second rotating frame is provided with a sliding plate, and the sliding plate is slidably arranged inside the adjusting tube (52). A third rotating arm (42) is fixedly provided at one end of the adjusting tube (52) and one end of the first rotating frame. Positioning grooves are provided at both ends of the second mounting ring (15) at positions corresponding to the positions of the third rotating arm (42). A fourth gear ring is fixedly provided at one end of the third rotating arm (42), and a rack (43) is meshed on the fourth gear ring. A connecting rod (43) is fixedly provided on one side of the rack (43). The connecting plate (41) is provided with a guide slot at a position corresponding to the position of the rack (43) inside the second mounting ring (15), and a guide slide rod is slidably provided on the connecting plate, and the guide slide rod is fixed in the guide slot. A first return spring (44) is provided between one side of the connecting plate and one end of the guide slot. The connecting plates on the same side of the first limiting wheel (41) are fixedly connected to the first linkage ring (45), and the connecting plates on the same side of the second limiting wheel (48) are fixedly connected to the second adjustment ring (53). The second adjustment ring (53) is fixedly connected to the output ends of the two electric cylinders (54), respectively. The electric cylinders (54) are fixedly provided on the second mounting ring (15). A fixing component for fixing the working position of the first linkage ring (45) is provided on one side of the second mounting ring (15), and an adjustment component for adjusting the distance between the first limiting wheel (41) and the second limiting wheel (48) is provided inside the adjustment tube (52).

2. A prefabricated welding device for pressure pipes in water conservancy and hydropower projects according to claim 1, characterized in that: The rotating mechanism comprises a first gear ring (28), one end of each of the first rotating arms (25) is fixedly provided with a first gear ring (28), the inner sides of each of the first mounting ring (13) and the second mounting ring (15) are provided with a receiving groove at a position corresponding to the position of the first rotating arm (25), one end of the first rotating arm (25) is hingedly arranged in the receiving groove, the first gear ring (28) is meshed with a first gear (29), the first gear (29) is rotatably arranged inside the first mounting ring (13) and the second mounting ring (15), the first gear (29) is meshed with a first gear ring segment (30), a plurality of the first gear ring segments (30) are fixedly arranged inside the mounting ring (32), and the mounting ring (32) is rotatably arranged in the rotating groove inside the first mounting ring (13) and the second mounting ring (15). A second gear ring segment (31) is fixedly provided on the outer side of the mounting ring (32), a second gear (33) is meshed with the second gear ring segment (31), second rotating plates are rotatably provided on the rotating shafts at both ends of the second gear (33), a second worm gear (34) is fixedly provided on the rotating shaft at one end of the second gear (33), a second worm gear (35) is meshed with the second worm gear (34), and third rotating plates are rotatably provided on the rotating shafts at both ends of the second worm gear (35), the second rotating plate and the third rotating plate are both fixedly provided on the first mounting ring (13) and the second mounting ring (15), the rotating shaft at one end of the second worm gear (35) is fixedly connected to the output end of the third motor (36), and the third motor (36) is fixedly provided on the first mounting ring (13) and the second mounting ring (15).

3. The prefabricated welding device for pressure pipes in water conservancy and hydropower projects according to claim 1 is characterized in that: The fixing assembly includes a limiting frame (47), two limiting frames (47) are symmetrically arranged on one side of the first linkage ring (45), a limiting hole is provided on one side of the limiting frame (47), a stop rod (46) is slidably provided in the limiting hole, the stop rod (46) is slidably provided inside the fixing tube, the fixing tube is fixed on one side of the second mounting ring (15), a second return spring is provided between one end of the stop rod (46) and one end inside the fixing tube, and a shift plate is fixedly provided on one end of the stop rod (46).

4. A prefabricated welding device for pressure pipes in water conservancy and hydropower projects according to claim 3, characterized in that: The adjusting assembly includes an adjusting screw (49), an adjusting screw (49) is rotatably provided inside the adjusting tube (52), the sliding plate is threadedly connected to the adjusting screw (49) through a threaded hole, a friction block is fixedly provided at one end of the adjusting screw (49), a stop block (50) is tightly attached to the friction block, the stop block (50) is rotatably provided at one end of a screw (51), the screw (51) is provided in a threaded hole at one end of a connecting tube, the connecting tube is fixedly provided at one side of the adjusting tube (52), and the stop block (50) is slidably provided in the connecting tube.

5. The prefabricated welding device for pressure pipes in water conservancy and hydropower projects according to claim 1 is characterized in that: The rotating mechanism includes a bearing (57), an inner ring of the bearing (57) is fixed with a first fixing ring, the first fixing ring is fixed on one side of a first mounting ring (13), a second fixing ring is fixed on the outer ring of the bearing (57), a plurality of extension plates are fixed on one side of the second fixing ring, the extension plates are all provided with threaded holes, the threaded holes are all fitted with threaded rods (56), one end of the threaded rods (56) is rotatably provided with a close-fitting plate (55), a third gear ring (58) is fixed on the second fixing ring, a seventh gear is meshed with the third gear ring (58), the seventh gear is fixed on the output end of a fifth motor (59), and the fifth motor (59) is fixed on the first mounting ring (13).

6. The prefabricated welding device for pressure pipes in water conservancy and hydropower projects according to claim 2, characterized in that: A second friction wheel (26) is provided on the inner side of the second mounting ring (15), and the array angle between the second friction wheel (26) and two adjacent first friction wheels (24) is equal to the array angle between the remaining first friction wheels (24). A second rotating arm (27) is provided on the outer side of the second friction wheel (26) for rotation. The second rotating arm (27) is hinged in the receiving groove. A first gear ring (28) is fixed on one end of the second rotating arm (27). A first gear (29) is meshed on the first gear ring (28). The first gear (29) is rotatably provided inside the second mounting ring (15). A first gear ring segment (30) is meshed on the first gear (29). The first gear ring segment (30) is fixed on the inner side of the mounting ring (32). The five first gears (29) are provided on the inner side of the second mounting ring (15). The gear ring segments (30) are arranged in a circumferential array, an annular groove is provided on the second friction wheel (26), an eighth gear is fixedly provided inside the annular groove, a third gear (38) is rotatably provided on a rotating shaft at one end of the second rotating arm (27), the third gear (38) and the eighth gear are connected to each other through a synchronous toothed belt (37), a fourth gear (39) is meshed with the third gear (38), the fourth gear (39) is rotatably provided in a mounting groove inside the second mounting ring (15), a rotating shaft at one end of the fourth gear (39) extends to the outside of the second mounting ring (15), a rotating shaft at one end of the fourth gear (39) is fixedly connected to the output end of a fourth motor (40), and the fourth motor (40) is fixedly provided on one side of the second mounting ring (15).

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