Inner clamping type steel pipe welding clamp

Abstract

The invention discloses an inner clamping type steel pipe welding clamp, and belongs to the technical field of steel pipe welding. Comprising a bottom plate, clamping wheels and other components, the rotating directions of threads at the two ends of a double-end threaded rod are opposite, the double-end threaded rod and a polished rod are installed on the bottom plate side by side, an output shaft of a first motor is connected with a first bevel gear, a second bevel gear matched with the first bevel gear is fixedly installed in the middle of the double-end threaded rod, and two clamping mechanisms are oppositely installed on a threaded sleeve. The two movable plates are symmetrically and slidably installed in the sliding grooves in the two ends of the bottom plate, and a containing table is fixed to the upper ends of the movable plates. According to the clamping mechanism, the multiple contact parts are used for conducting multi-point positioning on the interiors of the steel pipes at the same time, meanwhile, the height of the clamping mechanism can be adjusted, the steel pipes are directly stabilized in the air through the clamping mechanism, the two steel pipes needing to be welded can be adjusted to be concentric and free of deviation, and the steel pipes cannot be shielded; and welding, grinding, polishing and other work are facilitated, and the precision of butt joint and post-treatment is improved.

Description

Technical Field

[0001] The invention relates to an inner clamp type steel pipe welding fixture, belonging to the technical field of steel pipe welding. Background Art

[0002] Steel pipes often appear in industrial production, construction and other fields. Usually, two steel pipes need to be placed horizontally and aligned, and two clamping mechanisms are used to clamp the two steel pipes respectively, and then the two steel pipes are welded. The internal clamp steel pipe welding fixture supports from the inside of the pipe, which not only does not damage the surface of the steel pipe, but also does not block part of the steel pipe area, and can perform post-processing such as grinding and polishing on the steel pipe. In the current existing technology, the clamping device clamps the outer wall of the steel pipe from the outside to the inside, and the pipe is generally flipped during the welding process, but it is difficult to ensure that the rotation speed of the two steel pipes is consistent and the pipes are concentric, which reduces the effectiveness of steel pipe welding and the quality of the weld.

[0003] Based on this, it is necessary to propose an inner clamp type steel pipe welding fixture. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides an inner clamp type steel pipe welding fixture, which is used to clamp the steel pipe from the inside to the outside and can make two steel pipes rotate synchronously.

[0005] The technical solution of the present invention is: an internal clamp type steel pipe welding fixture, comprising a base plate 1, a cassette wheel 4, a double-headed threaded rod 9, a polished rod 8, a first motor 12, a movable plate 2, a clamping mechanism 6 and a threaded sleeve 14 installed on the double-headed threaded rod 9 and the polished rod 8 at the same time, the threaded sleeve 14 includes two symmetrical ones, the cassette wheel 4 is fixedly installed at the bottom of the base plate 1, the threads at both ends of the double-headed threaded rod 9 have opposite rotation directions, the double-headed threaded rod 9 and the polished rod 8 are installed side by side on the base plate 1, the output shaft of the first motor 12 is connected with a first bevel gear 11, and the second bevel gear 10 matched with the first bevel gear 11 is fixedly installed in the middle of the double-headed threaded rod 9, the two clamping mechanisms 6 are relatively installed on the threaded sleeve 14, the two movable plates 2 are symmetrically and slidably installed in the slide grooves 7 at both ends of the base plate 1, and the upper end of the movable plate 2 is fixed with a placing table 3.

[0006] Specifically, two ends of the double-headed threaded rod 9 are rotatably connected to two sides of the bottom plate 1 , and two ends of the smooth rod 8 are fixedly connected to two sides of the bottom plate 1 .

[0007] Specifically, the cassette wheel 4 includes: a wheel sleeve 44, a bearing 45, a clamping plate 46 and a bottom wheel 47. The clamping plate 46 is movably mounted on the wheel sleeve 44, and the bearing 45 and the bottom wheel 47 are fixedly mounted on the wheel sleeve 44. The wheel sleeve 44 is fixedly connected to the shaft at the bottom of the base plate 1 through the bearing 45.

[0008] Specifically, the clamping mechanism 6 includes a hydraulic cylinder 15, a support frame 17, a second motor 21, a rotating shaft 23, a rotating disk 22, a cylinder 35, and an internal support mechanism 5. One end of the hydraulic cylinder 15 is fixedly installed above the threaded sleeve 14, and the other end is connected to a hydraulic rod 16. The upper end of the hydraulic rod 16 is fixedly connected to the support frame 17. The top of the support frame 17 is provided with an axial hole 18 for the rotating shaft 23 to pass through. A rotating shaft 19 is fixedly installed at one end of the rotating shaft 23. A third bevel gear 20 that meshes with each other is fixedly installed at one end of the rotating shaft 19. The third bevel gear 20 is connected to the output shaft of the second motor 21. The second motor 21 is fixedly installed on the support frame 17. One end of the rotating shaft 23 is fixedly connected to one side of the rotating disk 22. A third motor 24 is fixedly installed inside the rotating shaft 23. A fourth bevel gear 25 is connected to the output shaft of the third motor 24. A plurality of fifth bevel gears 26 are annularly meshed on the wheel 25, and a plurality of threaded rods 27 are connected to the ends of the plurality of fifth bevel gears 26. The plurality of threaded rods 27 pass through the circular holes 29 on the surface of the rotating shaft 23 and are fixedly installed on the rotating disk 22. The rotating disk 22 is provided with a plurality of grooves 34. A telescopic plate 28 is movably installed on the plurality of threaded rods 27 fixedly connected to the rotating disk 22. The end of the telescopic plate 28 passes through the through hole on the rotating disk 22, and a pressure sensor 33 is installed at the end of the telescopic plate 28. A lifting rod 31 is fixedly connected above the pressure sensor 33, and an arc-shaped support plate 30 is fixedly connected above the lifting rod 31. A first spring 32 is connected between the pressure sensor 33 and the arc-shaped support plate 30. A cylinder 35 is fixedly installed at the center of the other side of the rotating disk 22, and a telescopic rod 36 is connected to the front end of the cylinder 35. An internal support mechanism 5 is installed at the top of the telescopic rod 36.

[0009] More specifically, the internal support mechanism 5 includes a supporting thick rod, a supporting thin rod, a rotating block 37, a telescopic block 38, and a contact sensor 40. One end of the supporting thick rod is fixedly connected to the telescopic rod 36, and the other end is fixedly connected to the center of one side of the rotating block 37. The rotating block 37 is annularly provided with a plurality of telescopic grooves 39, and a telescopic block 38 that can be telescoped outward is installed inside the telescopic grooves 39. One end of the supporting thin rod is fixedly connected to the center of the other side of the rotating block 37, and the other end is fixedly connected to the contact sensor 40.

[0010] Specifically, the movable plate 2 is movably mounted on the slide rod 13 in the slide groove 7 on the bottom plate 1 , a cylindrical groove 43 is opened at one end of the movable plate 2 , a handle 42 is fixedly mounted in the cylindrical groove 43 , and the handle 42 is connected to the bottom of the cylindrical groove 43 through a second spring 41 .

[0011] The beneficial effects of the present invention are as follows: the present invention adjusts the placement table on the movable plate to a suitable position by adjusting the handle on one side of the movable plate on the bottom plate, so that the two steel pipes can be placed stably on the placement table; further, the first motor drives the clamping mechanism to approach or move away from each other with the threaded sleeve, and when the two clamping mechanisms approach each other, the two steel pipes can be approached to each other until their two ends are against each other to achieve stable clamping; further, the cylinder makes the contact sensor at the front end of the internal support mechanism contact, and the second motor drives the gear mechanism to move the telescopic plate upward, driving the arc-shaped support plate to move upward, and at the same time the telescopic block also moves upward to support the steel pipe from the inside, thereby increasing its clamping stability; further, the hydraulic cylinder drives the support frame to move upward, so that the steel pipe is separated from the placement table, and the third motor drives the rotating disk to rotate synchronously with the rotating shaft, so that the two steel pipes can maintain the same rotation speed, thereby preventing the weld from being misaligned, further improving the welding effect, and facilitating subsequent post-processing work such as grinding and polishing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the connection between the first motor, the double-threaded rod and the polished rod of the present invention; Figure 3 is a schematic diagram of the clamping mechanism of the present invention; Figure 4 It is an enlarged schematic diagram of the rotating shaft portion of the present invention; Figure 5 It is an enlarged schematic diagram of the rotating disk part of the present invention; Figure 6 is a cross-sectional view of the movable plate portion of the present invention; Figure 7 It is an enlarged schematic diagram of the cassette wheel part of the present invention.

[0013] The reference numerals in the figure are: 1, bottom plate; 2, moving plate; 3, placing table; 4, cassette wheel; 5, internal support mechanism; 6, clamping mechanism; 7, slide groove; 8, bare rod; 9, double-headed threaded rod; 10, second bevel gear; 11, first bevel gear; 12, first motor; 13, slide rod; 14, threaded sleeve; 15, hydraulic cylinder; 16, hydraulic rod; 17, support frame; 18, shaft hole; 19, rotating shaft; 20, third bevel gear; 21, second motor; 22, rotating disk; 23, rotating shaft; 24 , the third motor; 25, the fourth bevel gear; 26, the fifth bevel gear; 27, the threaded rod; 28, the telescopic plate; 29, the round hole; 30, the arc-shaped support plate; 31, the lifting rod; 32, the first spring; 33, the pressure sensor; 34, the groove; 35, the cylinder; 36, the telescopic rod; 37, the rotating block; 38, the telescopic block; 39, the telescopic groove; 40, the contact sensor; 41, the second spring; 42, the handle; 43, the cylindrical groove; 44, the wheel sleeve; 45, the bearing; 46, the clamping plate; 47, the bottom wheel. DETAILED DESCRIPTION

[0014] The invention is further described below in conjunction with the accompanying drawings and embodiments, but the content of the invention is not limited to the scope of the embodiments.

[0015] Example 1: Figure 1-7 As shown, an internal clamp type steel pipe welding fixture includes a base plate 1, a cassette wheel 4, a double-headed threaded rod 9, a smooth rod 8, a first motor 12, a movable plate 2, a clamping mechanism 6 and a threaded sleeve 14 installed on the double-headed threaded rod 9 and the smooth rod 8 at the same time, the threaded sleeve 14 includes two symmetrical ones, the cassette wheel 4 is fixedly installed at the bottom of the base plate 1, the threads at both ends of the double-headed threaded rod 9 have opposite rotation directions, the double-headed threaded rod 9 and the smooth rod 8 are installed side by side on the base plate 1, the output shaft of the first motor 12 is connected with a first bevel gear 11, and the second bevel gear 10 matched with the first bevel gear 11 is fixedly installed in the middle of the double-headed threaded rod 9, the two clamping mechanisms 6 are relatively installed on the threaded sleeve 14, the two movable plates 2 are symmetrically and slidably installed in the slide grooves 7 at both ends of the base plate 1, and the upper end of the movable plate 2 is fixed with a placing table 3.

[0016] Furthermore, two ends of the double-headed threaded rod 9 are rotatably connected to two sides of the base plate 1 , and two ends of the smooth rod 8 are fixedly connected to two sides of the base plate 1 .

[0017] Furthermore, if Figure 7 As shown, the cassette wheel 4 includes: a wheel sleeve 44, a bearing 45, a clamping plate 46 and a bottom wheel 47. The clamping plate 46 is movably mounted on the wheel sleeve 44, and the bearing 45 and the bottom wheel 47 are fixedly mounted on the wheel sleeve 44. The wheel sleeve 44 is fixedly connected to the shaft at the bottom of the bottom plate 1 through the bearing 45. Lowering the clamping plate 46 can fix the wheel to prevent it from rolling.

[0018] Furthermore, if Figure 1, 3 As shown in , 4, and 5, the clamping mechanism 6 includes a hydraulic cylinder 15, a support frame 17, a second motor 21, a rotating shaft 23, a rotating disk 22, a cylinder 35, and an internal support mechanism 5. One end of the hydraulic cylinder 15 is fixedly installed above the threaded sleeve 14, and the other end is connected to a hydraulic rod 16. The upper end of the hydraulic rod 16 is fixedly connected to the support frame 17. The top of the support frame 17 is provided with an axial hole 18 for the rotating shaft 23 to pass through. One end of the rotating shaft 23 is fixedly installed with a rotating shaft 19, and one end of the rotating shaft 19 is fixedly installed with a third bevel gear 20 that meshes with each other. The third bevel gear 20 is connected to the output shaft of the second motor 21, and the second motor 21 is fixedly installed on the support frame 17. The hydraulic cylinder 15 moves the clamping mechanism 6 above the hydraulic rod 16 up and down, which is convenient for clamping and welding of the steel pipe before and after welding.

[0019] One end of the rotating shaft 23 is fixedly connected to one side of the rotating disk 22, and a third motor 24 is fixedly installed inside the rotating shaft 23. A fourth bevel gear 25 is connected to the output shaft of the third motor 24, and a plurality of fifth bevel gears 26 are annularly meshed on the fourth bevel gear 25. A plurality of threaded rods 27 are connected to the ends of the plurality of fifth bevel gears 26. The plurality of threaded rods 27 pass through circular holes 29 on the surface of the rotating shaft 23 and are fixedly installed on the rotating disk 22. A plurality of grooves 34 are provided on the rotating disk 22. A telescopic plate 28 is movably installed on the plurality of threaded rods 27 fixedly connected to the rotating disk 22. The end of the telescopic plate 28 passes through a through hole on the rotating disk 22, and a pressure sensor 33 is installed at the end of the telescopic plate 28. A lifting rod 31 is fixedly connected above the pressure sensor 33, and an arc support plate 30 is fixedly connected above the lifting rod 31. A first spring 32 is connected between the pressure sensor 33 and the arc support plate 30. When the arc-shaped support plate 30 contacts the inner wall of the pipe, the first spring 32 is squeezed by compressing the lifting rod 31. The first spring 32 transmits the pressure to the pressure sensor 33. The pressure sensor 33 stops the third motor 24 after detecting the appropriate pressure.

[0020] A cylinder 35 is fixedly installed at the center of the other side of the rotating disk 22 , a telescopic rod 36 is connected to the front end of the cylinder 35 , and an internal supporting mechanism 5 is installed at the top end of the telescopic rod 36 .

[0021] Furthermore, the internal support mechanism 5 includes a thick support rod, a thin support rod, a rotating block 37, a telescopic block 38, and a contact sensor 40. One end of the thick support rod is fixedly connected to the telescopic rod 36, and the other end is fixedly connected to the center of one side of the rotating block 37. The rotating block 37 is provided with a plurality of telescopic slots 39 in an annular shape, and a telescopic block 38 that can be telescoped outward is installed inside the telescopic slot 39. One end of the thin support rod is fixedly connected to the center of the other side of the rotating block 37, and the other end is fixedly connected to the contact sensor 40. After the contact sensors 40 at the front end of the internal support mechanism 5 contact each other, the cylinder 35 stops the telescopic rod 36 from continuing to telescope, and drives the third motor 24 and the telescopic block 38 on the rotating block 37 at the same time.

[0022] Furthermore, if Figure 1 , 2 As shown in , 6, the movable plate 2 is movably mounted on the slide bar 13 in the slide groove 7 on the bottom plate 1, and a cylindrical groove 43 is opened at one end of the movable plate 2, and a handle 42 is fixedly mounted in the cylindrical groove 43, and the handle 42 is connected to the bottom of the cylindrical groove 43 through a second spring 41. After the handle 42 is pulled out, it can rotate and contact the bottom plate 1, and the elastic force of the second spring 41 makes the movable plate 2 stable.

[0023] The working principle and use process of the present invention are as follows: By lowering the card plate 46 on the card wheel 4, the wheel can be fixed to prevent it from rolling.

[0024] Adjust the movable plate 2 in the bottom plate 1 so that the steel pipe is stably placed on the placement table 3, start the first motor 12 to drive the double-headed threaded rod 9 to rotate, and the double-headed threaded rod 9 drives the threaded sleeve 14 to move in opposite directions through the threads rotating in opposite directions, so as to move closer to or away from each other. When the two threaded sleeves 14 are close to each other, the two ends of the two steel pipes can be abutted against each other through the clamping mechanism 6, so as to ensure that the two steel pipes are tightly attached to each other; The cylinder 35 extends the telescopic rod 36 to make contact with the contact sensor 40 at the front end of the internal support mechanism 5. After contact, the cylinder 35 stops driving, and the rotating block 37 extends the telescopic block 38, and starts the third motor 24 to drive the fourth bevel gear 25 and the fifth bevel gear 26 to rotate, so that the telescopic plate 28 on the rotating disk 22 moves upward, and the arc-shaped support plate 30 on the telescopic plate 28 contacts the inner wall of the pipeline. After the arc-shaped support plate 30 contacts the inner wall of the pipeline, it compresses the first spring 32 by compressing the lifting rod 31, and the first spring 32 transmits the pressure to the pressure sensor 33. After the pressure sensor 33 detects the appropriate pressure, the third motor 24 is stopped, so that the steel pipe is firmly clamped, and its surface is not blocked, which is convenient for post-processing such as grinding and polishing; The hydraulic cylinder 15 drives the support frame 17 on the hydraulic rod 16 to move upward, so that the clamped steel pipe is away from the placement table 3. By starting the second motor 21, the meshing third bevel gear 20 drives the rotating shaft 19 to rotate, and the rotating shaft 19 drives the rotating shaft 23 to rotate. The rotating disk 22 rotates through the rotating shaft 23 and then rotates. When the rotating disk 22 rotates, it can drive the arc support plate 30 and the telescopic block 38 to rotate synchronously, so that the two steel pipes can maintain the same rotation speed, prevent the weld from being misaligned, and further improve the welding quality.

[0025] The clamping mechanism in the present invention utilizes multiple contact parts to simultaneously perform multi-point positioning in the steel pipe, and can also adjust the height of the clamping mechanism. The steel pipe is directly stabilized in the air by the clamping mechanism, and the two steel pipes to be welded can be adjusted to a concentric and non-deviation state without blocking the steel pipe, thereby facilitating welding, grinding, polishing and the like, and improving the accuracy of docking and post-processing.

[0026] It should be noted that the terms "first", "second", etc. in the present invention are used to distinguish similar objects and cannot be understood as indicating or implying relative importance.

[0027] The specific implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above implementation modes, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. An inner clamp type steel pipe welding fixture, characterized in that: The invention comprises a base plate (1), a cassette wheel (4), a double-threaded rod (9), a smooth rod (8), a first motor (12), a movable plate (2), a clamping mechanism (6), and a threaded sleeve (14) simultaneously mounted on the double-threaded rod (9) and the smooth rod (8), wherein the threaded sleeve (14) comprises two symmetrical sleeves, the cassette wheel (4) is fixedly mounted on the bottom of the base plate (1), the threads at two ends of the double-threaded rod (9) are rotated in opposite directions, the double-threaded rod (9) and the smooth rod (8) are mounted side by side on the base plate (1), the output shaft of the first motor (12) is connected to a first bevel gear (11), a second bevel gear (10) matched with the first bevel gear (11) is fixedly mounted on the middle part of the double-threaded rod (9), the two clamping mechanisms (6) are relatively mounted on the threaded sleeve (14), the two movable plates (2) are symmetrically and slidably mounted in the slide grooves (7) at two ends of the base plate (1), and the upper end of the movable plate (2) is fixed with a placing table (3).

2. The inner clamp type steel pipe welding fixture according to claim 1 is characterized in that: The two ends of the double-ended threaded rod (9) are rotatably connected to the two sides of the bottom plate (1), and the two ends of the smooth rod (8) are fixedly connected to the two sides of the bottom plate (1).

3. The inner clamp type steel pipe welding fixture according to claim 1, characterized in that: The card wheel (4) comprises: a wheel sleeve (44), a bearing (45), a card plate (46) and a bottom wheel (47); the card plate (46) is movably mounted on the wheel sleeve (44); the bearing (45) and the bottom wheel (47) are both fixedly mounted on the wheel sleeve (44); and the wheel sleeve (44) is fixedly connected to a shaft at the bottom of the bottom plate (1) via the bearing (45).

4. The inner clamp type steel pipe welding fixture according to claim 1, characterized in that: The clamping mechanism (6) comprises a hydraulic cylinder (15), a support frame (17), a second motor (21), a rotating shaft (23), a rotating disk (22), a cylinder (35), and an internal supporting mechanism (5); one end of the hydraulic cylinder (15) is fixedly mounted above the threaded sleeve (14); the other end is connected to a hydraulic rod (16); the upper end of the hydraulic rod (16) is fixedly connected to the support frame (17); the top end of the support frame (17) is provided with an axial hole (18) for the rotating shaft (23) to pass through; one end of the rotating shaft (23) is fixedly mounted on the threaded sleeve (14); A rotating shaft (19) is fixedly installed, and a third bevel gear (20) meshing with each other is fixedly installed on one end of the rotating shaft (19), and the third bevel gear (20) is connected to the output shaft of the second motor (21). The second motor (21) is fixedly installed on the support frame (17). One end of the rotating shaft (23) is fixedly connected to one side of the rotating disk (22). A third motor (24) is fixedly installed inside the rotating shaft (23). The output shaft of the third motor (24) is connected to a fourth bevel gear (25). The fourth bevel gear ( A plurality of fifth bevel gears (26) are meshed in an annular shape on the rotating disk (25), and a plurality of threaded rods (27) are connected to the ends of the plurality of fifth bevel gears (26). The plurality of threaded rods (27) pass through circular holes (29) on the surface of the rotating shaft (23) and are fixedly mounted on the rotating disk (22). The rotating disk (22) is provided with a plurality of grooves (34). A telescopic plate (28) is movably mounted on the plurality of threaded rods (27) fixedly connected to the rotating disk (22), and the ends of the telescopic plate (28) pass through the through holes on the rotating disk (22). A pressure sensor (33) is installed at the end of the telescopic plate (28), a lifting rod (31) is fixedly connected above the pressure sensor (33), an arc-shaped support plate (30) is fixedly connected above the lifting rod (31), a first spring (32) is connected between the pressure sensor (33) and the arc-shaped support plate (30), a cylinder (35) is fixedly installed at the center of the other side of the rotating disk (22), a telescopic rod (36) is connected to the front end of the cylinder (35), and an internal support mechanism (5) is installed at the top end of the telescopic rod (36).

5. The inner clamp type steel pipe welding fixture according to claim 4 is characterized in that: The internal support mechanism (5) comprises a thick supporting rod, a thin supporting rod, a rotating block (37), a telescopic block (38), and a contact sensor (40); one end of the thick supporting rod is fixedly connected to the telescopic rod (36), and the other end is fixedly connected to the center of one side of the rotating block (37); the rotating block (37) is provided with a plurality of telescopic grooves (39) in an annular shape, and a telescopic block (38) that can be telescoped outward is installed inside the telescopic groove (39); one end of the thin supporting rod is fixedly connected to the center of the other side of the rotating block (37), and the other end is fixedly connected to the contact sensor (40).

6. The inner clamp type steel pipe welding fixture according to claim 1, characterized in that: The movable plate (2) is movably mounted on a slide rod (13) in a slide groove (7) on the bottom plate (1). A cylindrical groove (43) is formed at one end of the movable plate (2). A handle (42) is fixedly mounted in the cylindrical groove (43). The handle (42) is connected to the bottom of the cylindrical groove (43) via a second spring (41).

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