Efficient positioning device special for accurate positioning of flange

Abstract

The invention relates to the technical field of positioning devices, in particular to an efficient positioning device special for accurate positioning of a flange, which comprises a positioning frame and further comprises a pipe clamping mechanism used for being connected with a to-be-welded pipeline and monitoring the connection tightness with the to-be-welded pipeline in real time, a swing frame rotatably mounted on the positioning frame, a movable fastening frame mounted on the swing frame, and a clamping mechanism mounted on the swing frame and used for clamping the to-be-welded pipeline. A rotatable rotating frame is installed on the fastening frame, an expanding and supporting mechanism is installed on the rotating frame, and two position-adjustable clamps and two position-adjustable transmission clamps are connected to the expanding and supporting mechanism. Multiple clamping modes are adopted for cooperative work, the problem that an existing clamping mode is single and unreliable is solved, the inner supporting block, the pressing block and the inner clamping face on the clamp can select to conduct clamping from the inner wall or the outer wall according to the flange type, the clamp is suitable for multiple flange types such as flat welding, butt welding, socket and sleeve loosening, and clamping equipment does not need to be frequently replaced.

Description

Technical Field

[0001] The present invention relates to the technical field of positioning devices, and particularly to an efficient positioning device dedicated to the precise positioning of flanges. Background Technique

[0002] In pipeline engineering, flanges are mainly used for pipeline connection. When welding flanges, positioning auxiliary devices are required. In the prior art, a patent document with the publication number CN114714039B discloses an auxiliary positioning device for flange welding. The above device can make the device adapt to various specifications of steel pipes for connection, increasing the adaptability range of the device. However, the above device has the following technical problems when in use: 1. Single and unreliable clamping method: The clamping method of the existing clamping device for flanges is relatively single, usually relying only on simple mechanical clamping, and cannot be flexibly adjusted according to the characteristics of the flange material, shape, etc. During the positioning welding process of the flange, due to the vibration and thermal stress generated by welding, the flange is prone to small displacements, resulting in a decrease in welding quality. Moreover, the traditional clamping method is difficult to adapt to various types of flanges, such as butt-welding flanges, socket-welding flanges, lap-joint flanges, loose flanges, etc. When facing different types of flanges, different clamping devices need to be replaced, increasing costs and operational complexity; 2. Problems with bolt fixing and tightening: When connecting the flange to the pipeline, there are no effective measures for bolt fixing. The vibration and external forces during the welding process often cause the bolts to shift or loosen, affecting the connection accuracy and stability. At the same time, the prior art cannot achieve the automatic tightening of nuts during flange connection. Manual tightening one by one is required, with low efficiency and it is difficult to ensure that the tightening degree of each nut is the same, affecting the overall connection strength. In addition, during the process of tightening the nuts, it is easy to scratch the surface of the bolts due to improper operation, reducing the service life and connection reliability of the bolts; Based on this, the present invention provides an efficient positioning device dedicated to the precise positioning of flanges to solve the problems raised in the above background technique. Summary of the Invention

[0003] In view of the technical problems existing in the prior art, the present invention provides an efficient positioning device dedicated to the precise positioning of flanges to solve the problems of the existing positioning device with a single and unreliable clamping method, inconvenient bolt fixing, and inconvenient automatic tightening.

[0004] The technical solution of the present invention to solve the above technical problems is as follows: An efficient positioning device dedicated to the precise positioning of flanges, including a positioning frame, further including: A pipe clamping mechanism for connecting with the pipeline to be welded and real-time monitoring of the connection tightness with the pipeline to be welded; A swing frame is rotatably installed on a positioning frame. A movable fastening frame is installed on the swing frame. A rotatable rotating frame is installed on the fastening frame. An expansion mechanism is installed on the rotating frame. Two position-adjustable clamps and two position-adjustable driving clamps are respectively connected to the expansion mechanism. Inner support blocks and pressing blocks are respectively installed on the outer wall surfaces of the clamps. An inner clamping surface is provided on the inner wall of the clamp. A driving bladder is installed on the driving clamp. An elastic clamp is connected to the surface of the driving clamp through an elastic pressing member. A set of universal clamping beads is embedded in the elastic clamp. A gas pumping mechanism is used to control the air pressure of the driving bladder. A flange body is fixed by the clamp. A set of bolts is used for connecting the pipeline to be welded and the flange body. A nut is provided on each bolt. A positioning and braking mechanism for positioning and braking the set of bolts is provided on the positioning frame.

[0005] Based on the above technical solutions, the present invention can be further improved as follows.

[0006] Further, the pipe clamping mechanism includes a spacing adjustment component. Two symmetrically arranged and spacing-adjustable force application seats are drivingly connected to the spacing adjustment component. An inner clamping frame is provided inside the force application seat. Both the force application seat and the inner clamping frame are slidably connected to the positioning frame. A set of pressure sensors is installed between the force application seat and the inner clamping frame. A set of rubber clamping balls is installed on the inner wall of the inner clamping frame. An outer clamping frame is provided outside the inner clamping frame. A set of T-shaped guide rods is installed on the inner clamping frame. Each T-shaped guide rod is slidably connected to the outer clamping frame. A clamping spring connected to the outer clamping frame is sleeved on the T-shaped guide rod. Two outer clamping columns are installed on the outer clamping frame. A single-chip microcomputer is installed on the fastening frame. The data end of the pressure sensor is data-connected to the single-chip microcomputer.

[0007] The beneficial effect of adopting the above further solution is that before use, the spacing between the two force application seats can be adjusted through the spacing adjustment component to adapt to pipelines to be welded with different pipe diameters. After the pipe clamping mechanism is sleeved on the pipeline to be welded, the rubber clamping balls on the inner clamping frame contact the inner wall of the pipeline, and the outer clamping columns on the outer clamping frame contact the outer wall surface of the flange on the pipeline to be welded. The pressure sensor monitors the pressure received by the inner clamping frame in real time and transmits the data to the single-chip microcomputer. By observing the pressure data, the connection tightness between the pipe clamping mechanism and the pipeline to be welded can be understood. At the same time, the clamping spring provides a certain elastic clamping force to ensure the stable connection between the pipe clamping mechanism and the pipeline, providing a reliable basis for subsequent flange positioning and welding.

[0008] Further, the spacing adjustment component includes a first motor installed on the side of the positioning frame and an adjusting screw rod rotatably connected to the positioning frame. The output shaft end of the first motor is fixedly connected to the adjusting screw rod. The adjusting screw rod is respectively provided with a first right-handed thread section and a first left-handed thread section, and the first right-handed thread section and the first left-handed thread section are respectively in transmission connection with two force-applying seats.

[0009] The beneficial effect of adopting the above further solution is that during use, the first motor is started, and the first motor drives the adjusting screw rod to rotate. Since the adjusting screw rod is provided with a first right-handed thread section and a first left-handed thread section, which are respectively in transmission connection with two force-applying seats, when the adjusting screw rod rotates, the two force-applying seats will move relatively or away from each other on the adjusting screw rod, so as to realize the quick clamping and loosening of the pipes to be welded with different pipe diameters. The operation is simple and convenient, improving the work efficiency, and the driving of the first motor makes the clamping force stable and adjustable.

[0010] Further, the swinging frame is hinged to the positioning frame, a swing arm push rod is hinged between the positioning frame and the swinging frame, a linear transmission module is installed in the swinging frame, the linear transmission module is in transmission connection with the fastening frame, and a worm gear motor is installed on the fastening frame. The worm gear motor is in transmission connection with the rotating frame through a chain.

[0011] The beneficial effect of adopting the above further solution is that the swing arm push rod can adjust the angle of the swinging frame relative to the positioning frame, which is convenient for adjusting the position of the swinging frame according to the actual welding requirements to achieve the best flange positioning and welding angle. The linear transmission module can drive the fastening frame to move in the swinging frame to realize the position adjustment of the flange body in the horizontal direction. The worm gear motor is in transmission connection with the rotating frame through a chain, which can accurately control the rotation angle of the rotating frame, and then adjust the directions of the expansion mechanism, the clamp and the transmission clamp, so that the whole positioning device can adapt to different welding working conditions, improving the flexibility and applicability of the positioning device; When it is necessary to realize the connection between the flange body and the pipe to be welded, through the angle-adjustable setting of the rotating frame, the flange holes on the pipe to be welded can be aligned with the flange holes on the flange body one by one, and then the precise positioning of the flange body and the pipe to be welded can be realized; During the alignment of the flange holes, through the settings of the inner support block, the pressing block and the inner clamping surface, the clamping of the flange body is realized; In the actual positioning process of the flange, there are various types of flanges, such as flat welding flanges, butt welding flanges, socket welding flanges, loose flange; When it is necessary to clamp the flange body from the outer wall surface of the flange body, the inner clamping surface clamps the flange body from the outside of the flange body; When it is necessary to clamp the inner wall surface of a specified type of flange body, the inner support block clamps the flange body from the inside of the flange body; In this way, it can meet the positioning and clamping requirements of different types of flange bodies.

[0012] Furthermore, the expansion mechanism includes a bidirectional screw rod rotatably connected to the rotating frame and a second motor fixed to the tail of the rotating frame, the output shaft end of the second motor is fixedly connected to the bidirectional screw rod through a coupling, the bidirectional screw rod is respectively provided with a second positive thread segment and a second negative thread segment, the second positive thread segment and the second negative thread segment are both transmission-connected with an expansion block, two guide rods are installed on the rotating frame, the two guide rods are both slidably connected to the expansion block, and a connecting rod is hinged between the two expansion blocks and the clamps and between the two expansion blocks and the transmission pliers.

[0013] The beneficial effect of adopting the above-mentioned further scheme is that when in use, the second motor is started, and the second motor drives the bidirectional screw to rotate. Since the bidirectional screw is provided with a second positive thread segment and a second negative thread segment, which are respectively connected to the two expansion blocks in transmission, when the bidirectional screw rotates, the two expansion blocks will make relative or opposite movements on the bidirectional screw. At the same time, the expansion block can only slide along the direction of the guide rod under the restriction of the guide rod, thereby ensuring the stability of the movement of the expansion block. The expansion block pushes the clamp and the transmission clamp to move through the connecting rod to achieve clamping and loosening of the flange body, and the position of the clamp and the transmission clamp can be adjusted according to the size of the flange body to adapt to flanges of different sizes, thereby improving the versatility of the device.

[0014] Furthermore, the elastic pressure member includes a T-shaped guide column installed on the bottom surface of the elastic clamp, the T-shaped guide column is slidably connected to the transmission clamp, and a plurality of clamping springs are installed between the elastic clamp and the transmission clamp.

[0015] The beneficial effect of adopting the above further scheme is that when in use, after the transmission pliers apply a certain clamping force to the flange body, the elastic pliers move toward the flange body under the action of the clamping spring, and the universal clamping bead on the elastic pliers contacts the surface of the flange body, providing additional clamping force and friction force to prevent the flange body from moving during the welding process. At the same time, the universal clamping bead can adapt to flange surfaces of different shapes to ensure the stability of clamping, and the sliding connection between the T-shaped guide column and the transmission pliers enables the elastic pliers to move flexibly and better fit the flange body. Furthermore, the air pump mechanism includes an air pump installed on a fastening frame and a pressure-controlled channel opened on a bidirectional screw, the pressure-controlled channel is rotatably connected to a front air ring and an exhaust ring, the air outlet port of the air pump is connected to the inner cavity of the exhaust ring through an air pipe, an air pressure probe is installed on the air pipe, the data end of the air pressure probe is connected to the data of the single-chip computer, the exhaust ring is connected to two soft conduits, and the other ends of the two soft conduits are respectively connected to the inner cavities of two transmission bags.

[0016] The beneficial effect of adopting the above-mentioned further scheme is that the air pump inflates the exhaust ring through the air pipe, and the gas enters the transmission bag through the pressure control flow channel and the soft tube, causing the transmission bag to expand and generate pressure, thereby applying a clamping force to the flange body. The air pressure probe monitors the air pressure in the air pipe in real time and transmits the data to the single-chip microcomputer. The single-chip microcomputer can control the working state of the air pump according to the set air pressure value, thereby achieving precise control of the transmission bag air pressure, and then precisely controlling the size of the clamping force. This precise air pressure control can ensure that the flange body is in a stable position during the welding process, improve the welding quality, and also facilitate the adjustment of the clamping force according to different welding requirements.

[0017] Furthermore, the transmission bag is made of hydrogenated nitrile rubber, the surface of the transmission bag is fixedly provided with friction lines, and the wall thickness of the transmission bag is 3mm-7mm.

[0018] The beneficial effect of adopting the above-mentioned further scheme is that the transmission bag made of hydrogenated nitrile rubber has good oil resistance, wear resistance and high temperature resistance, and can work stably for a long time in a welding environment. The friction texture on the surface increases the friction between the transmission bag and the flange body, preventing sliding during the clamping process and improving the clamping reliability. The wall thickness of 3mm-7mm makes the transmission bag have sufficient strength while ensuring a certain elasticity, and can withstand greater pressure to ensure the stable output of the clamping force, and the appropriate wall thickness can be selected according to actual use requirements.

[0019] Furthermore, four guide grooves are provided on the rotating frame, and the two clamps and the two transmission clamps are slidably connected to a guide groove at a corresponding position.

[0020] The beneficial effect of adopting the above-mentioned further scheme is that the guide groove provides a precise sliding track for the clamp and the transmission pliers, ensuring the stability and accuracy of the clamp and the transmission pliers during the movement, so that the clamp and the transmission pliers can accurately reach the predetermined position to clamp and operate the flange body, avoiding deviation or shaking during the movement, and improving the accuracy and reliability of the positioning device.

[0021] Furthermore, the positioning brake mechanism comprises a brake ring, a group of brake push rods are installed between the brake ring and the positioning frame, and the surface of the brake ring is fixedly provided with brake patterns for braking the bolts.

[0022] The beneficial effects of adopting the above further solution are as follows. After the flange and the pipeline to be welded are aligned, bolts are arranged in the flange holes. After the bolts are arranged, the brake push rod is activated to push the brake ring towards the flange, so that the brake lines on the surface of the brake ring are in close contact with the surface of the bolts. Axial locking of the bolts is achieved through frictional force and mechanical pressure, preventing the bolts from shifting or loosening due to vibration or external force during the welding process. This structure solves the problems of deviation and inclination of bolts caused by the lack of effective fixation during traditional flange welding, ensuring synchronous and precise positioning of multiple bolts. After the bolts are arranged, nuts are initially installed on each bolt. After the nuts are installed, by rotating the bidirectional lead screw, the inner support block or clamp is moved away from the nut by a set degree and finally does not affect the rotation or tightening of the nut. However, under the action of the elastic pressing member, the universal clamping beads hold the flange body. After the universal clamping beads maintain the positioning and clamping of the flange body, the transmission bladder is fully pressed, and the transmission bladder can be in close contact with the nut. Subsequently, the turntable rotates in a circular motion at a set speed. Under the driving action of the transmission bladder, multiple nuts are gradually tightened. When the nuts are tightened to a set degree, the gas inside the transmission bladder is emptied, and the external operator further tightens the nuts to precisely improve the tightening degree of the nuts and the tight connection between the pipeline to be welded and the flange body. The annular integrated design of the brake ring can simultaneously apply uniform braking force to multiple bolts distributed in a circumferential manner, avoiding the risk of deformation caused by local stress concentration, and greatly improving the coaxiality and parallelism accuracy between the flange and the pipeline. In addition, the adjustable stroke of the brake push rod can adapt to the clamping requirements of bolts of different specifications. Combined with the anti-slip design of the brake lines, it not only ensures the clamping stability but also avoids scratching the surface of the bolts, providing a reliable positioning reference for the subsequent welding process and significantly improving the assembly efficiency and welding quality.

[0023] The beneficial effects of the present invention are as follows: 1. The present invention adopts multiple clamping methods to work together, solving the problems of single and unreliable existing clamping methods. The inner support block, pressing block, and inner clamping surface on the clamp can be selected to clamp from the inner wall or outer wall according to the flange type, adapting to various flange types such as butt welding, fillet welding, socket welding, and loose sleeve, without the need to frequently replace the clamping equipment. The transmission bladder on the transmission clamp cooperates with the elastic clamp and universal clamping beads to provide a stable clamping force under the precise control of the air pump mechanism.

[0024] 2. Aiming at the problems of bolt fixation and tightening in the prior art, the positioning and braking mechanism of the present invention plays a key role. The brake ring is pushed by the brake push rod to axially lock the bolts by using the brake lines on the surface, preventing the bolts from shifting or loosening during welding and ensuring synchronous and precise positioning of multiple bolts. At the same time, through the cooperation of the bidirectional lead screw, transmission bladder, and turntable, the nuts are automatically tightened, avoiding the problems of low efficiency, inconsistent tightening degree, and scratching of bolts during manual tightening, improving the assembly efficiency and connection strength, which are innovative functions not possessed by the prior art.

[0025] 3. In the present invention, the spacing adjustment component of the pipe clamp mechanism can adjust the spacing of the force application seats to adapt to pipes with different diameters. The pressure sensor monitors the connection tightness in real time to ensure stable connection. The swing frame adjusts the angle through the adjustment arm push rod. The linear drive module and the worm motor respectively achieve precise control of the horizontal movement of the fastening frame and the rotation angle of the rotating frame. The expansion support mechanism can adjust the positions of the clamp and the transmission clamp according to the size of the flange. These designs enable the device to adapt to various welding working conditions, and there is a significant improvement in the applicable range and operation convenience compared with the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of an efficient positioning device dedicated to the precise positioning of flanges according to the present invention; Figure 2 According to the present invention Figure 1 A schematic diagram of the structure from another perspective; Figure 3 It is a schematic diagram of the positioning frame and the rubber clamping ball according to the present invention; Figure 4 According to the present invention Figure 3 A schematic diagram of the structure from another perspective; Figure 5 According to the present invention Figure 4 A partial enlarged schematic diagram of part A in the present invention; Figure 6 It is a schematic diagram of the fastening frame and the rotating frame according to the present invention; Figure 7 It is a schematic diagram of the transmission capsule and the universal clamping beads according to the present invention; Figure 8 It is a schematic diagram of the transmission capsule and the connecting rod according to the present invention; Figure 9 According to the present invention Figure 8 A partial enlarged schematic diagram of part B in the present invention; Figure 10 It is a schematic diagram of the pipe to be welded according to the present invention; Figure 11 It is a schematic diagram of the air pipe and the air pressure probe according to the present invention.

[0027] In the drawings, the list of components represented by each reference numeral is as follows: 1. Positioning frame; 2. Pipeline to be welded; 3. Swing frame; 4. Fastening frame; 5. Rotary frame; 6. Clamp; 7. Driving clamp; 8. Inner support block; 9. Pressing block; 10. Inner clamping surface; 11. Driving bladder; 12. T-shaped guide post; 13. Elastic clamp; 14. Universal clamping bead; 15. Bolt; 16. Flange body; 17. Spacing adjustment component; 18. Force application seat; 19. Inner clamping frame; 20. Pressure sensor; 21. Rubber clamping ball; 22. Outer clamping frame; 23. T-shaped guide rod; 24. Clamping spring; 25. Outer clamping post; 26. Single-chip microcomputer; 27. Adjusting arm push rod; 28. Linear drive module; 29. Worm motor; 30. Expanding support block; 31. Guide rod; 32. Connecting rod; 33. Air pump; 34. Air pipe; 35. Air pressure probe; 36. Front air ring; 37. Exhaust gas ring; 38. Brake ring; 39. Brake push rod; 40. Bi-directional lead screw; 41. Tightening spring. Specific implementation mode

[0028] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0029] The present invention provides the following preferred embodiments As Figure 1-11 shown, a high-efficiency positioning device dedicated to the precise positioning of flanges includes a positioning frame 1 and further includes: A pipe clamping mechanism for connecting with the pipeline 2 to be welded and real-time monitoring the connection tightness with the pipeline 2 to be welded; The pipe clamping mechanism includes a spacing adjustment component 17. Two symmetrically arranged and spacing-adjustable force application seats 18 are drivingly connected to the spacing adjustment component 17. An inner clamping frame 19 is arranged inside the force application seat 18. Both the force application seat 18 and the inner clamping frame 19 are slidably connected to the positioning frame 1. A group of pressure sensors 20 are installed between the force application seat 18 and the inner clamping frame 19. A group of rubber clamping balls 21 are installed on the inner wall of the inner clamping frame 19. An outer clamping frame 22 is arranged outside the inner clamping frame 19. A group of T-shaped guide rods 23 are installed on the inner clamping frame 19. Each T-shaped guide rod 23 is slidably connected to the outer clamping frame 22. A clamping spring 24 connected to the outer clamping frame 22 is sleeved on the T-shaped guide rod 23. Two outer clamping posts 25 are installed on the outer clamping frame 22. A single-chip microcomputer 26 is installed on the fastening frame 4. The data end of the pressure sensor 20 is data-connected to the single-chip microcomputer 26.

[0030] Before use, the distance between the two force - applying seats 18 can be adjusted through the distance - adjusting component 17 to adapt to the pipes 2 to be welded with different pipe diameters. After the pipe - clamping mechanism is sleeved on the pipe 2 to be welded, the rubber clamping balls 21 on the inner clamping frame 19 are in contact with the inner wall of the pipe, and the outer clamping columns 25 on the outer clamping frame 22 are in contact with the outer wall surface of the flange on the pipe 2 to be welded. The pressure sensor 20 monitors the pressure received by the inner clamping frame 19 in real - time and transmits the data to the single - chip microcomputer 26. By observing the pressure data, the connection tightness between the pipe - clamping mechanism and the pipe 2 to be welded can be understood. At the same time, the clamping spring 24 provides a certain elastic clamping force to ensure the stable connection between the pipe - clamping mechanism and the pipe, providing a reliable basis for subsequent flange positioning and welding.

[0031] The distance - adjusting component 17 includes a first motor installed on the side of the positioning frame 1 and an adjusting screw rod rotatably connected to the positioning frame 1. The output shaft end of the first motor is fixedly connected to the adjusting screw rod. The adjusting screw rod is respectively provided with a first right - hand thread section and a first left - hand thread section, and the first right - hand thread section and the first left - hand thread section are respectively in transmission connection with the two force - applying seats 18.

[0032] During use, start the first motor. The first motor drives the adjusting screw rod to rotate. Since the adjusting screw rod is provided with a first right - hand thread section and a first left - hand thread section, which are respectively in transmission connection with the two force - applying seats 18, when the adjusting screw rod rotates, the two force - applying seats 18 will move relatively or away from each other on the adjusting screw rod, thus realizing the quick clamping and loosening of the pipes 2 to be welded with different pipe diameters. The operation is simple and convenient, improving the work efficiency. And the driving of the first motor makes the clamping force stable and adjustable; The swing frame 3 is rotatably installed on the positioning frame 1. A movable fastening frame 4 is installed on the swing frame 3, and a rotatable rotating frame 5 is installed on the fastening frame 4; The swing frame 3 is hinged to the positioning frame 1. An adjusting arm push rod 27 is hinged between the positioning frame 1 and the swing frame 3. A linear transmission module 28 is installed in the swing frame 3. The linear transmission module 28 is in transmission connection with the fastening frame 4. A worm - gear motor 29 is installed on the fastening frame 4, and the worm - gear motor 29 is in transmission connection with the rotating frame 5 through a chain; The adjusting arm push rod 27 can adjust the angle of the swing frame 3 relative to the positioning frame 1, facilitating the adjustment of the position of the swing frame 3 according to the actual welding requirements to achieve the best flange positioning and welding angle. The linear transmission module 28 can drive the fastening frame 4 to move in the swing frame 3, realizing the position adjustment of the flange body 16 in the horizontal direction. The worm - gear motor 29 is in transmission connection with the rotating frame 5 through a chain, capable of precisely controlling the rotation angle of the rotating frame 5, and then adjusting the directions of the expanding mechanism, the clamping pliers 6, and the driving pliers 7, enabling the entire positioning device to adapt to different welding working conditions and improving the flexibility and applicability of the positioning device; An expanding mechanism is installed on the rotating frame 5, and two position - adjustable clamping pliers 6 and two position - adjustable driving pliers 7 are respectively connected to the expanding mechanism; Four guide grooves are provided on the turntable 5, and two clamping pliers 6 and two driving pliers 7 are slidably connected to a guide groove at the corresponding position.

[0033] The guide grooves provide accurate sliding tracks for the clamping pliers 6 and the driving pliers 7, ensuring the stability and accuracy of the clamping pliers 6 and the driving pliers 7 during movement, enabling the clamping pliers 6 and the driving pliers 7 to accurately reach the predetermined positions to clamp and operate on the flange body 16, avoiding deviation or shaking during movement, and improving the accuracy and reliability of the positioning device; Inner support blocks 8 and pressing blocks 9 are respectively installed on the outer wall surface of the clamping pliers 6. An inner clamping surface 10 is provided on the inner wall of the clamping pliers 6. A transmission bladder 11 is installed on the driving pliers 7. An elastic clamping plier 13 is connected to the surface of the driving pliers 7 through an elastic pressing member. A group of universal clamping beads 14 are embedded in the elastic clamping plier 13; A pneumatic pumping mechanism for controlling the air pressure of the transmission bladder 11; A flange body 16 fixed by the clamping pliers 6; A group of bolts 15 for connecting the pipeline 2 to be welded with the flange body 16. Nuts are provided on each bolt 15. A positioning and braking mechanism for positioning and braking the group of bolts 15 is provided on the positioning frame 1.

[0034] During butt welding, through the angle-adjustable setting of the turntable 5, the flange holes on the pipeline 2 to be welded can be aligned one by one with the flange holes on the flange body 16, and then the precise positioning of the flange body 16 and the pipeline 2 to be welded can be achieved; During the alignment of the flange holes, through the settings of the inner support blocks 8, the pressing blocks 9 and the inner clamping surface 10, the clamping of the flange body 16 is then achieved; During the actual positioning process of the flange, there are various types of flanges, such as slip-on flanges, butt-welding flanges, socket-welding flanges, loose flanges; When it is necessary to clamp the flange body 16 from the outer wall surface of the flange body 16, the inner clamping surface 10 clamps the flange body 16 from the outside of the flange body 16; When it is necessary to clamp the inner wall surface of a specified type of flange body 16, the inner support block 8 clamps the flange body 16 from the inside of the flange body 16; In this way, to meet the positioning and clamping requirements of different types of flange bodies 16.

[0035] The expanding mechanism includes a bidirectional lead screw 40 rotatably connected to the rotating frame 5 and a second motor fixed to the tail of the rotating frame 5. The output shaft end of the second motor is fixedly connected to the bidirectional lead screw 40 through a coupling. A second right-handed thread section and a second left-handed thread section are respectively arranged on the bidirectional lead screw 40. An expanding block 30 is drivingly connected to both the second right-handed thread section and the second left-handed thread section. Two guide rods 31 are installed on the rotating frame 5. Both of the two guide rods 31 are slidably connected to the expanding block 30. A connecting rod 32 is hinged between the two expanding blocks 30 and the clamp 6 and between the two expanding blocks 30 and the driving clamp 7 respectively.

[0036] During use, start the second motor. The second motor drives the bidirectional lead screw 40 to rotate. Since the second right-handed thread section and the second left-handed thread section are arranged on the bidirectional lead screw 40 and are respectively drivingly connected to the two expanding blocks 30, when the bidirectional lead screw 40 rotates, the two expanding blocks 30 will move relatively or away from each other on the bidirectional lead screw 40. At the same time, the expanding block 30 can only slide along the direction of the guide rod 31 under the restriction of the guide rod 31, ensuring the stability of the movement of the expanding block 30. The expanding block 30 pushes the clamp 6 and the driving clamp 7 to move through the connecting rod 32, realizing the clamping and loosening of the flange body 16, and the positions of the clamp 6 and the driving clamp 7 can be adjusted according to the size of the flange body 16 to adapt to flanges of different sizes, improving the versatility of the device.

[0037] The elastic pressing member includes a T-shaped guide post 12 installed on the bottom surface of the elastic clamp 13. The T-shaped guide post 12 is slidably connected to the driving clamp 7. A plurality of abutting springs 41 are installed between the elastic clamp 13 and the driving clamp 7.

[0038] During use, when the driving clamp 7 applies a certain clamping force to the flange body 16, the elastic clamp 13 moves towards the flange body 16 under the action of the abutting spring 41. The universal clamping beads 14 on the elastic clamp 13 come into contact with the surface of the flange body 16, providing additional clamping force and friction force to prevent the flange body 16 from moving during the welding process. At the same time, the universal clamping beads 14 can adapt to the surfaces of flanges of different shapes, ensuring the stability of clamping, and the sliding connection between the T-shaped guide post 12 and the driving clamp 7 enables the elastic clamp 13 to move flexibly and better fit the flange body 16; The air pumping mechanism includes an air pump 33 installed on the fastening frame 4 and a pressure control flow channel opened on the bidirectional lead screw 40. A front air ring 36 and a tail air ring 37 are respectively rotatably communicated with the pressure control flow channel. The air outlet port of the air pump 33 is communicated with the inner cavity of the tail air ring 37 through an air pipe 34. An air pressure probe 35 is installed on the air pipe 34. The data end of the air pressure probe 35 is data-connected to the single-chip microcomputer 26. Two soft conduits are communicated with the tail air ring 37. The other ends of the two soft conduits are respectively communicated with the inner cavities of the two driving bladders 11.

[0039] The air pump 33 inflates the tail gas ring 37 through the air pipe 34. The gas enters the transmission bladder 11 through the pressure control flow channel and the flexible conduit, causing the transmission bladder 11 to expand and generate pressure, thereby applying a clamping force to the flange body 16. The air pressure probe 35 monitors the air pressure in the air pipe 34 in real time and transmits the data to the single-chip microcomputer 26. The single-chip microcomputer 26 can control the working state of the air pump 33 according to the set air pressure value, realizing precise control of the air pressure in the transmission bladder 11, and then precisely controlling the magnitude of the clamping force. This precise air pressure control can ensure that the flange body 16 is in a stable position during the welding process, improving the welding quality. At the same time, it is also convenient to adjust the clamping force according to different welding requirements.

[0040] The transmission bladder 11 is made of hydrogenated nitrile rubber. The surface of the transmission bladder 11 is fixedly provided with friction lines, and the wall thickness of the transmission bladder 11 is 6 mm.

[0041] The transmission bladder 11 made of hydrogenated nitrile rubber has good oil resistance, wear resistance and high temperature resistance, and can work stably for a long time in the welding environment. The friction lines on the surface increase the friction force between the transmission bladder 11 and the flange body 16, preventing sliding during the clamping process and improving the reliability of clamping. The wall thickness of 3 mm - 7 mm enables the transmission bladder 11 to have sufficient strength while ensuring a certain elasticity, can withstand a large pressure, ensure the stable output of the clamping force, and the appropriate wall thickness can be selected according to the actual use requirements.

[0042] The positioning and braking mechanism includes a braking ring 38. A set of braking push rods 39 are installed between the braking ring 38 and the positioning frame 1. The surface of the braking ring 38 is fixedly provided with braking lines for braking the bolt 15.

[0043] After the flange and the pipeline 2 to be welded are aligned, bolts 15 are arranged in the flange holes. After the bolts 15 are arranged, the braking push rods 39 are started to push the braking ring 38 to move towards the flange direction, so that the braking lines on the surface of the braking ring 38 are in close contact with the surface of the bolt 15, realizing axial locking of the bolt 15 through friction force and mechanical pressure, preventing the bolt 15 from shifting or loosening due to vibration or external force during the welding process. This structure solves the problems of deviation and inclination of the bolt 15 caused by the lack of effective fixation during traditional flange welding, ensuring synchronous and precise positioning of multiple bolts 15; After the bolts 15 are arranged, nuts are preliminarily installed on each bolt 15. After the nuts are installed, by rotating the bidirectional lead screw 40, the inner support block 8 or the clamp 6 is moved away from the nut by a set degree and finally does not affect the rotation or tightening of the nut. However, under the action of the elastic pressing member, the universal clamping beads 14 hold the flange body 16. After the universal clamping beads 14 maintain the positioning and clamping of the flange body 16, the transmission bladder 11 is fully pressed, and the transmission bladder 11 can be in close contact with the nut. Subsequently, the turntable 5 makes a revolution rotation at a set speed. Under the driving action of the transmission bladder 11, multiple nuts are gradually tightened. When the nuts are tightened to a set degree, the gas inside the transmission bladder 11 is emptied, and the external operator further tightens the nuts to accurately improve the tightening degree of the nuts and the tight connection between the pipeline 2 to be welded and the flange body 16; The annular integrated design of the brake ring 38 can simultaneously apply uniform braking force to a plurality of bolts 15 distributed in a circumferential manner, avoiding the deformation risk caused by local stress concentration, and greatly improving the coaxiality and parallelism accuracy between the flange and the pipeline. In addition, the stroke adjustability of the brake push rod 39 can adapt to the clamping requirements of bolts 15 of different specifications. Combined with the anti-slip design of the brake lines, it not only ensures the clamping stability but also avoids scratching the surface of the bolts 15, providing a reliable positioning reference for the subsequent welding process and significantly improving the assembly efficiency and welding quality.

[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An efficient positioning device specifically for the precise positioning of flanges, comprising a positioning frame (1), characterized in that, It further includes: A pipe clamp mechanism for connecting with the pipe to be welded (2) and monitoring the connection tightness with the pipe to be welded (2) in real time; A swing frame (3) rotatably installed on the positioning frame (1). A movable fastening frame (4) is installed on the swing frame (3). A rotatable rotating frame (5) is installed on the fastening frame (4). An expansion mechanism is installed on the rotating frame (5); Two position-adjustable clamps (6) and two position-adjustable transmission clamps (7) are respectively connected to the expansion mechanism. Inner support blocks (8) and pressing blocks (9) are respectively installed on the outer wall surfaces of the clamps (6). An inner clamping surface (10) is provided on the inner wall of the clamps (6). A transmission bladder (11) is installed on the transmission clamps (7). An elastic clamp (13) is connected to the surface of the transmission clamps (7) through an elastic pressing member. A group of universal clamping beads (14) are embedded on the elastic clamp (13); A pump air mechanism for controlling the air pressure of the transmission bladder (11); A flange body (16) fixed by the clamps (6); A group of bolts (15) for connecting the pipe to be welded (2) and the flange body (16). Nuts are provided on each bolt (15). A positioning and braking mechanism for positioning and braking the group of bolts (15) is provided on the positioning frame (1).

2. The high-efficiency positioning device specifically for the precise positioning of a flange according to claim 1, characterized in that, The pipe clamp mechanism includes a spacing adjustment component (17). Two symmetrically arranged and spacing-adjustable force application seats (18) are drivingly connected to the spacing adjustment component (17). An inner clamping frame (19) is provided inside the force application seats (18). The force application seats (18) and the inner clamping frame (19) are both slidably connected to the positioning frame (1). A group of pressure sensors (20) are installed between the force application seats (18) and the inner clamping frame (19). A group of rubber clamping balls (21) are installed on the inner wall of the inner clamping frame (19). An outer clamping frame (22) is provided outside the inner clamping frame (19). A group of T-shaped guide rods (23) are installed on the inner clamping frame (19). Each T-shaped guide rod (23) is slidably connected to the outer clamping frame (22). A clamping spring (24) connected to the outer clamping frame (22) is sleeved on the T-shaped guide rod (23). Two outer clamping columns (25) are installed on the outer clamping frame (22). A single-chip microcomputer (26) is installed on the fastening frame (4). The data end of the pressure sensor (20) is data-connected to the single-chip microcomputer (26).

3. The high-efficiency positioning device specifically for the precise positioning of a flange according to claim 2, wherein, The spacing adjustment component (17) includes a first motor installed on the side of the positioning frame (1) and an adjustable-distance screw rod rotatably connected to the positioning frame (1). The output shaft end of the first motor is fixedly connected to the adjustable-distance screw rod; A first positive thread section and a first reverse thread section are respectively arranged on the adjustable-distance screw rod. The first positive thread section and the first reverse thread section are respectively drivingly connected to the two force application seats (18).

4. An efficient positioning device specifically for the precise positioning of flanges according to claim 1, characterized in that, The swing frame (3) is hinged on the positioning frame (1); an arm adjustment push rod (27) is hinged between the positioning frame (1) and the swing frame (3); a linear transmission module (28) is installed in the swing frame (3); the linear transmission module (28) is in driving connection with the fastening frame (4); a worm motor (29) is installed on the fastening frame (4); and the worm motor (29) is in driving connection with the rotating frame (5) via a chain.

5. An efficient positioning device dedicated to the precise positioning of flanges according to claim 1, characterized in that, The expansion mechanism comprises a bidirectional screw (40) rotatably connected to the rotating frame (5) and a second motor fixed to the rear end of the rotating frame (5); the output shaft end of the second motor is fixedly connected to the bidirectional screw (40) via a coupling; the bidirectional screw (40) is respectively provided with a second positive thread segment and a second negative thread segment; the second positive thread segment and the second negative thread segment are both transmission-connected to an expansion block (30); two guide rods (31) are installed on the rotating frame (5); the two guide rods (31) are both slidably connected to the expansion block (30); a connecting rod (32) is hingedly connected between the two expansion blocks (30) and the clamp (6) and between the two expansion blocks (30) and the transmission clamp (7).

6. The high-efficiency positioning device specifically for the precise positioning of a flange according to claim 1, characterized in that, The elastic pressure member comprises a T-shaped guide column (12) mounted on the bottom surface of the elastic clamp (13), the T-shaped guide column (12) is slidably connected to the transmission clamp (7), and a plurality of clamping springs (41) are mounted between the elastic clamp (13) and the transmission clamp (7).

7. An efficient positioning device dedicated to the precise positioning of flanges according to claim 1, characterized in that, The air pump mechanism comprises an air pump (33) mounted on a fastening frame (4) and a pressure control channel provided on a bidirectional screw rod (40); the pressure control channel is rotatably connected to a front air ring (36) and an exhaust air ring (37); an air outlet port of the air pump (33) is connected to an inner cavity of the exhaust air ring (37) via an air pipe (34); an air pressure probe (35) is mounted on the air pipe (34); a data end of the air pressure probe (35) is connected to data of a single chip microcomputer (26); two soft conduits are connected to the exhaust air ring (37); the other ends of the two soft conduits are connected to the inner cavities of two transmission bags (11) respectively.

8. An efficient positioning device dedicated to the precise positioning of a flange, characterized in that, The transmission bag (11) is made of hydrogenated nitrile rubber, a friction pattern is fixedly arranged on the surface of the transmission bag (11), and the wall thickness of the transmission bag (11) is 3 mm to 7 mm.

9. The high-efficiency positioning device specifically for the precise positioning of flanges according to claim 1, wherein, Four guide grooves are provided on the rotating frame (5), and the two clamps (6) and the two transmission clamps (7) are slidably connected to a guide groove at a corresponding position.

10. The high-efficiency positioning device dedicated to the precise positioning of a flange according to claim 1, characterized in that, The positioning brake mechanism comprises a brake ring (38), a group of brake push rods (39) are installed between the brake ring (38) and the positioning frame (1), and a brake pattern for braking the bolt (15) is fixedly provided on the surface of the brake ring (38).

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