High-strength three-way welding connection structure for hydrogen conveying pipeline

Abstract

The high-strength three-way welding connection structure for the hydrogen conveying pipeline belongs to the field of three-way welding and comprises a base, two sliding grooves are formed in the upper surface of the base, first motors are fixed to the left side and the right side of the base correspondingly, and output shafts of the first motors penetrate into the sliding grooves and are fixedly connected with first screw rods; vertical frames are in threaded connection with the outer surfaces of the first screws, second motors are fixed to the opposite sides of the two vertical frames, and the opposite ends of output shafts of the two second motors penetrate to the opposite sides of the two vertical frames correspondingly. Supporting is provided from the inner wall of the three-way pipe through the supporting rollers, the transverse pipe positioning mechanism applies clamping force from the outer wall through the clamping blocks, a double-positioning structure of inner supporting and outer clamping is formed, it is ensured that three ports of the three-way pipe are strictly coaxial, and welding deflection is avoided; the clamping force can be automatically adjusted according to the small difference of the pipe diameters of the three-way pipes, the three-way pipes of different specifications can be rapidly matched through linear driving of the sliding frame and the air cylinder, and the universality is remarkably improved.

Description

A high-strength tee welded connection structure for hydrogen transportation pipelines Technical Field

[0001] This invention relates to the field of tee welding technology, and in particular to a high-strength tee welding connection structure for hydrogen transportation pipelines. Background Technology

[0002] In hydrogen pipeline engineering, the tee pipe is a key connecting component, and its welding quality directly affects the safety and stability of the pipeline system. Traditional tee welding connection structures generally have the following problems: Insufficient positioning accuracy: Relying on a single mechanical clamp or manual calibration, it is difficult to achieve precise coaxial alignment of the multiple ports of the tee pipe, resulting in uneven weld joints and easy formation of stress concentration points.

[0003] Poor clamping stability: For thick-walled tees commonly used in high-pressure hydrogen pipelines, the clamping force distribution of traditional structures is uneven, and small displacements are prone to occur during welding, affecting the weld strength.

[0004] Insufficient versatility: It is difficult to adapt to tees of different specifications (pipe diameter, wall thickness), requiring frequent changes of tooling and resulting in low construction efficiency.

[0005] Low level of automation: It relies heavily on manual operation to adjust the welding angle, making it difficult to meet the needs of all-position welding under complex working conditions.

[0006] Therefore, there is an urgent need for a high-precision, highly adaptable high-strength tee welding connection structure for hydrogen transportation pipelines. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a high-strength tee welding connection structure for hydrogen transportation pipelines, solving the problems mentioned in the background section.

[0008] Technical Solution: To solve the above-mentioned technical problems, according to one aspect of the present invention, more specifically, a high-strength tee welding connection structure for hydrogen transportation pipelines, comprising a base, two sliding grooves formed on the upper surface of the base, a motor 1 fixed on each of the left and right sides of the base, the output shaft of the motor 1 passing through the interior of the sliding groove and fixedly connected to a screw 1, a vertical bracket threaded to the outer surface of the screw 1, a motor 2 fixed on each of the two vertical brackets on opposite sides, the opposite ends of the output shafts of the two motor 2 passing through the opposite sides of the two vertical brackets and jointly fixed to a connecting mechanism, a tee pipe clamped and fixed inside the connecting mechanism; the connecting mechanism includes two horizontal pipe positioning mechanisms, two cylinders, two slides, and a front pipe positioning mechanism; the front pipe positioning mechanism includes a front plate, side plates symmetrically fixed on the outer surface of the front plate, the two side plates being slidably connected to the interior of the two slides respectively. The side plate and the carriage are both fixed with a spring. A column is integrally formed at the center of the rear surface of the front plate. A pressure ring is slidably connected to the outer surface of the column. Four connecting plates are fixed to the front surface of the pressure ring. The front end of the connecting plate extends into the interior of the front plate and is rotatably connected to a rotating plate. A transition piece is rotatably connected to the section of the rotating plate away from the connecting plate. A connecting plate is rotatably connected to the inner side of the transition piece. A turntable is rotatably connected inside the front plate. A lead screw is fixed in the middle of the turntable. The end of the connecting plate away from the transition piece is rotatably connected to the surface of the turntable. Two screw discs are threaded to the outer surface of the lead screw. Four connecting rods are rotatably connected to the outer surfaces of the two screw discs. The front and rear connecting rods form a group. Each group of two connecting rods is rotatably connected to a support frame. The support frame extends to the outside of the column. A support roller is rotatably connected to the inner side of the support frame.

[0009] Furthermore, the horizontal tube positioning mechanism includes a side plate, and a second tube column is integrally formed at the center of the side plate near the center of the three-way tube. The second tube column and the side plate are slidably connected to a toothed rod. The outer surface of the second tube column has four rotating grooves, and a rotating frame is rotatably connected inside the rotating grooves. A gear is fixed at one end of the rotating frame inside the rotating groove, and the gear meshes with the toothed rod. The outer surface of the side plate has four inner grooves, and the inner sidewalls of the inner grooves have symmetrical arc tracks. A slider is slidably connected inside two of the arc tracks. The outer surface of the slider is fixedly connected to the end of the rotating frame away from the gear. A toothed cylinder is rotatably connected inside the inner grooves. A straight toothed plate and an arc toothed plate are meshed on the outer surface of the toothed cylinder. The arc toothed plate is fixedly connected to the rotating frame. The end of the straight toothed plate away from the toothed cylinder extends to the outside of the side plate and is fixedly attached to an outer frame. The outer frame is located outside the three-way tube and is fixedly attached to a clamping block. A torsion spring is provided inside the toothed cylinder, and a second spring is fixedly attached to the toothed rod and the side plate.

[0010] Furthermore, the first tube column and the two second tube columns are all located inside the three-way pipe; the outer surfaces of the four support rollers are all in contact with the inner wall of the three-way pipe; the outer surfaces of the eight rotating frames are respectively in contact with the inner walls of the left and right ports of the three-way pipe; the output shaft of the second motor is fixedly connected to the side plate; and the opposite ends of the two gear racks are in contact.

[0011] Furthermore, the rear surface of the pressure ring is in contact with the front end of the tee tube.

[0012] Furthermore, the clamping block is in contact with the outer surface of the tee pipe.

[0013] Furthermore, a support is fixed to the upper surface of the base, and the lower surface of the outer surface of the three-way pipe is in contact with the upper surface of the support.

[0014] Furthermore, the two cylinders are respectively fixed through the opposite ends of the two side plates, and the front end of the cylinder is fixedly connected to the slide.

[0015] Furthermore, both the support roller and the clamping block are made of rubber.

[0016] The beneficial effects of the high-strength tee welding connection structure for hydrogen pipeline of the present invention are as follows: (1) Multi-dimensional precise positioning to ensure welding accuracy and internal and external coordinating clamping: The front pipe positioning mechanism provides support from the inner wall of the tee pipe through the support roller, and the horizontal pipe positioning mechanism applies clamping force from the outer wall through the clamping block to form a double positioning structure of "internal support and external clamping" to ensure that the three ends of the tee pipe are strictly coaxial and avoid welding deviation.

[0017] Elastic adaptive adjustment: Under the action of spring one and spring two, torsion spring, pressure plate, rotating frame, toothed rod and other structures, the present invention can automatically adjust the clamping force according to the slight difference in the diameter of the tee pipe. With the linear drive of the slide and cylinder, it can quickly adapt to tee pipes of different specifications, and the versatility is significantly improved.

[0018] (2) Uniform force distribution: The screw-coil-connecting rod transmission mechanism enables the support to expand evenly. The rotating frame-arc tooth plate-tooth cylinder-straight tooth plate linkage structure ensures that the outer support of the rotating frame and the clamping block are synchronized, realizing the circumferential uniform distribution of clamping force and improving welding stability.

[0019] (3) Automated drive to improve construction efficiency and adapt to complex working conditions: Motor 1 and screw 1 realize the lateral movement of the horizontal pipe positioning mechanism. Motor 2 drives the connecting mechanism to rotate and drive the three-way pipe to rotate 180° to realize all-position welding support. With the longitudinal advancement of the cylinder, the positioning and multi-angle welding of the three-way pipe can be completed quickly, reducing manual intervention and adapting to the needs of automated welding.

[0020] Quick clamping and disassembly: The bracket provides basic support, and the positioning mechanism achieves quick clamping through elastic linkage and gear and rack transmission, which shortens the clamping time and improves construction efficiency. Attached Figure Description

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific implementation methods.

[0022] Figure 1 is a structural schematic diagram of the present invention; Figure 2 is a cross-sectional structural schematic diagram of the present invention; Figure 3 is a top cross-sectional structural schematic diagram of the present invention; Figure 4 is a structural schematic diagram of the connecting mechanism in the present invention; Figure 5 is a structural schematic diagram of the front tube positioning mechanism in the present invention; Figure 6 is a schematic diagram of the internal structure of the front tube positioning mechanism in the present invention; Figure 7 is a rear view structural schematic diagram of Figure 6 of the present invention; Figure 8 is a structural schematic diagram of the horizontal tube positioning mechanism in the present invention; Figure 9 is a cross-sectional structural schematic diagram of the horizontal tube positioning mechanism in the present invention.

[0023] In the diagram: 1. Base; 2. Slide rail; 3. Motor 1; 4. Screw 1; 5. Vertical frame; 6. Motor 2; 7. Connecting mechanism; 8. Horizontal tube positioning mechanism; 9. Cylinder; 10. Slide carriage; 11. Front tube positioning mechanism; 12. T-joint; 13. Front plate; 14. Side plate; 15. Support; 16. Spring 1; 17. Tube column 1; 18. Pressure ring; 19. Turntable; 20. Connecting plate 1; 21. Turning plate; 22. 23. Adapter; 24. Connecting plate II; 25. Lead screw; 26. Screw; 27. Connecting rod; 28. Support frame; 29. ​​Support roller; 30. Side plate; 31. Pipe column II; 32. Gear rack; 33. Rotary groove; 34. Rotating frame; 35. Gear; 36. Inner groove; 37. Arc track; 38. Slider; 39. Gear cylinder; 40. Straight gear plate; 41. Outer frame; 42. Clamping block; 43. Arc gear plate; 44. Torsion spring; 45. Spring II. Detailed Implementation

[0024] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in the present application can be combined with each other.

[0025] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Referring to Figures 1-9, a high-strength tee welding connection structure for hydrogen transportation pipelines includes a base 1. Two grooves 2 are formed on the upper surface of the base 1. Motor 3 is fixed to both the left and right sides of the base 1. The output shaft of motor 3 passes through the groove 2 and is fixedly connected to a screw 4. A vertical bracket 5 is threaded onto the outer surface of the screw 4. Motor 6 is fixed to the opposite sides of the two vertical brackets 5. The opposite ends of the output shafts of the two motors 6 pass through the opposite sides of the two vertical brackets 5 and are jointly fixed to a connecting mechanism 7. A tee pipe 12 is clamped and fixed inside the connecting mechanism 7. The connecting mechanism 7 includes two horizontal pipe positioning mechanisms 8, two cylinders 9, two slides 10, and a front pipe positioning mechanism 11. The tee pipe 12 consists of a rear horizontal pipe and a front pipe. The two horizontal pipe positioning mechanisms 8 are used to position and clamp the horizontal pipe, and the front pipe positioning mechanism 11 is used to position the front pipe. The cylinders 9 are used to control the front pipe positioning mechanism 11 and the contact positioning of the front pipe section with the horizontal pipe.

[0027] The front tube positioning mechanism 11 includes a front plate 13. Side plates 14 are symmetrically fixed to the outer surface of the front plate 13. The two side plates 14 are slidably connected to the interiors of two carriages 10, respectively. A spring 16 is fixed to both the side plates 14 and the interiors of the carriages 10. A tube column 17 is integrally formed at the center of the rear surface of the front plate 13. A pressure ring 18 is slidably connected to the outer surface of the tube column 17. Four connecting plates 20 are fixed to the front surface of the pressure ring 18. The front ends of the connecting plates 20 extend into the interior of the front plate 13 and are rotatably connected to a rotating plate 21. A transition piece 22 is rotatably connected to the section of the rotating plate 21 away from the connecting plates 20. A second connecting plate 23 is rotatably connected to the inner side of the transition piece 22. The front plate 13 is internally connected to a turntable 19, and a lead screw 24 is fixed in the middle of the turntable 19. The end of the connecting plate 23 away from the adapter 22 is rotatably connected to the surface of the turntable 19. The outer surface of the lead screw 24 is threaded with two screw discs 25. The outer surfaces of the two screw discs 25 are rotatably connected with four connecting rods 26. The front and rear connecting rods 26 form a group. Each group of two connecting rods 26 is rotatably connected to a support frame 27. The support frame 27 extends to the outside of the first tube column 17. The inner side of the support frame 27 is rotatably connected to a support roller 28. The horizontal tube positioning mechanism 8 includes a side plate 29. The center of the side plate 29 near the tee tube 12 is integrally formed with a second tube column 30. The second column 30 and the side plate 29 are slidably connected by a rack 31. The outer surface of the second column 30 has four rotating grooves 32, and a rotating frame 33 is rotatably connected inside the rotating grooves 32. A gear 34 is fixed at one end of the rotating frame 33 inside the rotating groove 32, and the gear 34 meshes with the rack 31. The outer surface of the side plate 29 has four inner grooves 35, and the inner sidewalls of the inner grooves 35 have symmetrically formed arc tracks 36. Two arc tracks 36 are slidably connected to a slider 37. The outer surface of the slider 37 is fixedly connected to the end of the rotating frame 33 away from the gear 34. A gear cylinder 38 is rotatably connected inside the inner groove 35, and a straight toothed plate is meshed with the outer surface of the gear cylinder 38. 39. Arc tooth plate 42, which is fixedly connected to the rotating frame 33. The end of the straight tooth plate 39 away from the tooth cylinder 38 extends to the outside of the side plate 29 and is fixed with an outer frame 40. The outer frame 40 is located outside the three-way pipe 12 and is fixed with a clamping block 41. A torsion spring 43 is installed inside the tooth cylinder 38. A spring 44 is fixed together with the tooth bar 31 and the side plate 29. Two cylinders 9 are fixedly connected to the opposite ends of the two side plates 29 respectively. The front end of the cylinder 9 is fixedly connected to the slide 10. The support roller 28 and the clamping block 41 are both made of rubber. Rubber can avoid damage from rigid contact and also improve the fit stability of clamping and external support fixing and increase friction.

[0028] In use, the T-pipe 12 is placed on the support 15. The motor 3 starts and drives the screw 4 to rotate, causing the vertical frame 5 to move on the slide groove 2. This adjusts the lateral position of the two horizontal pipe positioning mechanisms 8 in the connecting mechanism 7, positioning the left and right openings of the horizontal pipe of the T-pipe 12 respectively. Under the action of the two springs 16, the front pipe positioning mechanism 11 is positioned in the middle. The operator places the front pipe of the T-pipe 12 at the opening of the horizontal pipe section and controls the cylinder 9 to retract, causing the front pipe positioning mechanism 11 to clamp and position the front pipe section of the T-pipe 12. The operator can then perform welding operations on the T-pipe 12. The motor 6 drives the connecting mechanism 7 to rotate, facilitating welding operations at different angles on the T-pipe 12.

[0029] The front tube positioning mechanism 11 clamps and positions the front section of the tee pipe 12 in the following steps: After the pressure ring 18 contacts and squeezes the front end of the front section of the tee pipe 12, it drives the four connecting plates 20 to slide. Under the pushing drive of the rotating plate 21, the adapter 22, and the connecting plate 23, the turntable 19 and the lead screw 24 rotate, and the two screw discs 25 move relative to each other. Under the push of the front and rear connecting rods 26, the support frame 27 and the support roller 28 move outward and contact the inner wall of the front section of the tee pipe 12 for support and positioning. The horizontal tube positioning mechanism 8 clamps and positions the horizontal section of the tee pipe 12. Positioning steps for the left and right pipe openings: Pipe column 2 30 moves into the left and right openings of the tee pipe 12. The rotating frame 33 rotates and contracts under the pressure of the inner wall of the tee pipe 12 (at this time, the gear cylinder 38 rotates under the transmission of the arc-tooth plate 42, compressing the internal torsion spring 43). When the two gear rods 31 contact and push against each other, the moving gear rods 31 cause the gear 34 to drive the rotating frame 33 to rotate. The rotation of the four rotating frames 33 on the outer support makes the horizontal pipe section of the tee pipe 12 coaxially positioned with pipe column 2 30, thus positioning the front pipe. Mechanism 11 and the center of the tee pipe 12 are at the same horizontal height. Simultaneously, the rotating frame 33 drives the arc-tooth plate 42 to rotate, and under the transmission of the toothed cylinder 38, the straight toothed plate 39 slides inward. This allows the outer frame 40 and clamping block 41 to clamp and fix the outer wall of the horizontal section of the tee pipe 12, ensuring that the tee pipe 12 can be rotated under the drive of motor 6, facilitating welding of different angles, surfaces, and seams of the tee pipe 12. Preferably, pipe column 17 and the two pipe columns 30 are located on the tee pipe. Inside the 12; the outer surfaces of the four support rollers 28 are all in contact with the inner wall of the three-way pipe 12; the outer surfaces of the eight rotating frames 33 are respectively in contact with the inner walls of the left and right ports of the three-way pipe 12; the output shaft of the second motor 6 is fixedly connected to the side plate 29, and the second motor 6 is used to drive the three-way pipe 12 to rotate axially with the horizontal pipe section and the horizontal pipe positioning mechanism 8 after the connecting mechanism 7 clamps it; the two toothed rods 31 are in contact with each other at their opposite ends, and the toothed rods 31 that are in contact with each other cause the corresponding gear 34 to move relative to each other, thereby realizing meshing transmission.

[0030] Preferably, the rear surface of the pressure ring 18 is in contact with the front end of the tee pipe 12; the clamping block 41 is in contact with the outer surface of the tee pipe 12, the pressure ring 18 is limited by the tee pipe 12 and forms a relative movement tendency with the front plate 13, and the clamping block 41 is used to externally clamp the horizontal section of the tee pipe 12.

[0031] Preferably, a support 15 is fixed on the upper surface of the base 1, and the lower part of the outer surface of the three-way pipe 12 is in contact with the upper surface of the support 15.

[0032] This design achieves precise positioning and stable clamping of the tee pipe 12, improving welding stability and convenience for multi-angle welding, and ensuring welding quality. Compared to traditional connection methods, the structure can adapt to different specifications of the tee pipe 12, offering greater versatility.

[0033] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A high-strength tee welded connection structure for hydrogen transportation pipelines, comprising a base (1), characterized in that: The upper surface of the base (1) has two sliding grooves (2). The left and right sides of the base (1) are fixed with motor 1 (3). The output shaft of motor 1 (3) passes through the inside of the sliding groove (2) and is fixedly connected with screw 1 (4). The outer surface of screw 1 (4) is threaded with vertical frame (5). The opposite sides of the two vertical frames (5) are fixed with motor 2 (6). The opposite ends of the output shafts of the two motor 2 (6) pass through the opposite sides of the two vertical frames (5) and are jointly fixed with connecting mechanism (7). The connecting mechanism (7) clamps and fixes a three-way pipe (12) inside. The connecting mechanism (7) includes two horizontal pipe positioning mechanisms (8), two cylinders (9), two slides (10), and a front pipe positioning mechanism (11).

2. The high-strength tee welded connection structure for hydrogen transportation pipelines according to claim 1, characterized in that: The front tube positioning mechanism (11) includes a front plate (13), with side plates (14) symmetrically fixed on the outer surface of the front plate (13). The two side plates (14) are slidably connected to the interior of the two slides (10). A spring (16) is fixed together inside the side plates (14) and the slides (10). A tube column (17) is integrally formed at the center of the rear surface of the front plate (13). A pressure ring (18) is slidably connected to the outer surface of the tube column (17). Four connecting plates (20) are fixed to the front surface of the pressure ring (18). The front end of the connecting plate (20) extends into the interior of the front plate (13) and is rotatably connected to a rotating plate (21). A transition piece is rotatably connected to a section of the rotating plate (21) away from the connecting plate (20). 22), the inner side of the adapter (22) is rotatably connected to the connecting plate two (23), the inner side of the front plate (13) is rotatably connected to the turntable (19), the middle of the turntable (19) is fixed with a screw rod (24), the end of the connecting plate two (23) away from the adapter (22) is rotatably connected to the surface of the turntable (19), the outer surface of the screw rod (24) is threaded with two screw discs (25), the outer surfaces of the two screw discs (25) are rotatably connected with four connecting rods (26), the front and rear two connecting rods (26) form a group, each group of two connecting rods (26) is rotatably connected to a support frame (27), the support frame (27) extends through to the outside of the first tube column (17), the inner side of the support frame (27) is rotatably connected to a support roller (28).

3. The high-strength tee welded connection structure for hydrogen transportation pipelines according to claim 2, characterized in that: The horizontal tube positioning mechanism (8) includes a side plate (29). A tube column (30) is integrally formed at the center of the side plate (29) near the center of the three-way tube (12). The tube column (30) and the side plate (29) are slidably connected together by a rack (31). Four rotating grooves (32) are opened on the outer surface of the tube column (30). A rotating frame (33) is rotatably connected inside the rotating grooves (32). A gear (34) is fixed at one end of the rotating frame (33) inside the rotating grooves (32). The gear (34) meshes with the rack (31). Four inner grooves (35) are opened on the outer surface of the side plate (29). Arc tracks (36) are symmetrically opened on the inner sidewalls of the inner grooves (35). Two of the arc tracks (36) slide together inside the inner sidewalls. A slider (37) is connected, and the outer surface of the slider (37) is fixedly connected to the end of the rotating frame (33) away from the gear (34). A gear cylinder (38) is rotatably connected inside the inner groove (35). A straight tooth plate (39) and an arc tooth plate (42) are meshed on the outer surface of the gear cylinder (38). The arc tooth plate (42) is fixedly connected to the rotating frame (33). The end of the straight tooth plate (39) away from the gear cylinder (38) extends to the outside of the side plate (29) and is fixed with an outer frame (40). The outer frame (40) is located outside the three-way pipe (12) and is fixed with a clamping block (41). A torsion spring (43) is provided inside the gear cylinder (38). A spring two (44) is fixed together inside the gear rod (31) and the side plate (29).

4. The high-strength tee welded connection structure for hydrogen transportation pipelines according to claim 3, characterized in that: The first tube column (17) and the two second tube columns (30) are located inside the three-way tube (12); the outer surfaces of the four support rollers (28) are in contact with the inner wall of the three-way tube (12); the outer surfaces of the eight rotating frames (33) are respectively in contact with the inner walls of the left and right ports of the three-way tube (12); the output shaft of the second motor (6) is fixedly connected to the side plate (29); the two toothed rods (31) are in contact with each other at opposite ends.

5. The high-strength tee welded connection structure for hydrogen transportation pipelines according to claim 1, characterized in that: The rear surface of the pressure ring (18) is in contact with the front end of the tee tube (12).

6. The high-strength tee welded connection structure for hydrogen transportation pipelines according to claim 3, characterized in that: The clamp (41) is in contact with the outer surface of the three-way pipe (12).

7. The high-strength tee welded connection structure for hydrogen transportation pipelines according to claim 1, characterized in that: The base (1) has a support (15) fixed on its upper surface, and the lower part of the outer surface of the three-way pipe (12) is in contact with the upper surface of the support (15).

8. The high-strength tee welded connection structure for hydrogen transportation pipelines according to claim 3, characterized in that: The two cylinders (9) are fixed through the opposite ends of the two side plates (29), and the front end of the cylinder (9) is fixedly connected to the slide (10).

9. A high-strength tee welded connection structure for hydrogen transportation pipelines according to claim 3, characterized in that: Both the support roller (28) and the clamping block (41) are made of rubber.

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