Clamping device for special-shaped pipe

Abstract

The utility model provides a clamping device for a special-shaped pipe, and belongs to the technical field of special-shaped pipe machining. The technical problems that in the prior art, clamping of special-shaped pipes is unstable, and welding adjustment is inconvenient are solved. According to the technical scheme, the device comprises a base, vertical plates are arranged on the two sides of the upper surface of the base respectively, rotating shafts are rotationally arranged on the sides, close to each other, of the two vertical plates respectively, rotating wheels fixedly sleeve the rotating shafts, annular steel plates are connected to the sides, close to each other, of the two rotating wheels through connecting rods respectively, and a plurality of telescopic mechanisms are evenly arranged on the outer side walls of the annular steel plates; the multiple telescopic mechanisms can stretch into the annular steel plate to clamp the special-shaped pipes. The special-shaped pipe welding fixture has the advantages that the special-shaped pipe with the irregular outer surface can be effectively clamped, stability and reliability are achieved, adjustment is convenient, and welding operation on the pipe is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of special-shaped pipe processing, in particular to a clamping device for special-shaped pipes. Background Art

[0002] In the mechanical processing industry, there are some special workpieces, which are non-standard special-shaped workpieces, and mechanical equipment usually has special use requirements for such workpieces, such as special-shaped pipes, pipes with non-circular cross-sections, or pipes with non-smooth cylindrical surfaces on the inner and outer surfaces. However, in the welding process of existing special-shaped pipes, due to the instability of the surface of the special-shaped pipes, the fixation is inconvenient and unstable, which is not convenient for workers to weld, and it is not easy to adjust during welding. Therefore, a clamping device for special-shaped pipes is urgently needed to solve the above technical problems. Utility Model Content

[0003] The utility model aims to overcome the problems in the background technology and provide a clamping device for special-shaped pipes, which can effectively clamp special-shaped pipes with irregular outer surfaces, is stable and reliable, and is easy to adjust, so as to facilitate welding operations on the pipes.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts a technical solution specifically as follows: a clamping device for special-shaped pipes, comprising a base, vertical plates are respectively arranged on both sides of the upper surface of the base, two vertical plates are respectively arranged on the sides close to each other with rotating shafts, a rotating wheel is fixedly sleeved on the rotating shaft, and an annular steel plate is respectively connected to the sides close to each other by a connecting rod, and multiple telescopic mechanisms are evenly arranged on the outer side wall of the annular steel plate, and the multiple telescopic mechanisms can respectively extend into the inside of the annular steel plate to clamp the special-shaped pipe;

[0005] A driving rod is also rotatably arranged between the two vertical plates, one end of the driving rod rotates through the corresponding vertical plate and is connected to a rocker arm, driving pulleys are respectively sleeved on both sides of the driving rod, and driven pulleys are respectively sleeved on the outer surfaces of the two rotating shafts, and transmission belts are respectively connected to the two driving pulleys and the corresponding driven pulleys, and a circular gear is also sleeved on the outer wall of the driving rod, and a locking mechanism that meshes with the circular gear is arranged on the vertical plate on the same side of the circular gear, and the locking mechanism can lock the circular gear to prevent the circular gear from rotating.

[0006] Furthermore, the telescopic mechanism includes a fixed shell connected to the outer side wall of the annular steel plate, a cavity is provided inside the fixed shell, an adjusting rod is rotatably inserted on the side of the fixed shell away from the annular steel plate, a clamping cylinder is threadedly connected to the outer surface of the adjusting rod located in the cavity, and the clamping cylinder slides through the outer side wall of the annular steel plate at one end away from the adjusting rod. By rotating the adjusting rod, the clamping cylinder can be driven to perform telescopic movement. Therefore, the telescopic distance of the clamping cylinder can be adjusted according to the specific shape of the outer surface of the special-shaped pipe, thereby achieving clamping of the outer surfaces of different special-shaped pipes.

[0007] Furthermore, the outer side wall of the clamping cylinder is connected to a limiting slide rod, and the side wall of the cavity is provided with a limiting slide groove which cooperates with the end of the limiting slide rod. During the telescopic movement of the clamping cylinder, the limiting slide rod will be driven to slide in the limiting slide groove, and the limiting slide groove plays a role of limiting and guiding the limiting slide rod. The setting of the limiting slide rod and the limiting slide groove can, on the one hand, enable the clamping cylinder to stably perform telescopic movement, thereby avoiding the clamping cylinder rotating with the adjusting rod during the rotation of the adjusting rod, and on the other hand, can keep the clamping force of the clamping cylinder unchanged, and will not cause the clamping cylinder to withdraw the wire due to vibration, thereby causing the clamping force to loosen.

[0008] Furthermore, a pressure block made of rubber material is arranged at one end of the clamping cylinder away from the adjusting rod. The setting of the pressure block can, on the one hand, prevent the damage to the special-shaped pipe caused by excessive pressure of the clamping cylinder, and on the other hand, increase the friction between the clamping cylinder and the special-shaped pipe to avoid slipping during the clamping process.

[0009] Furthermore, a round knob is provided at the end of the adjusting rod located outside the fixed shell. The provision of the round knob facilitates the user to drive the adjusting rod to rotate through the round knob.

[0010] Furthermore, the locking mechanism includes a fixed plate arranged on the side wall of the vertical plate, a pull rod is slidably inserted on the fixed plate, one end of the pull rod is provided with a tooth plate meshing with the circular gear, and the other end is connected to a pull head, a spring is connected between the tooth plate and the fixed plate, when the welding of one side of the special-shaped pipe is completed and it needs to be adjusted to the other side, the pull head is pulled upward, the pull head drives the pull rod and the tooth plate to move in a direction away from the circular gear, the tooth plate is separated from the circular gear, and the spring is in a compressed state at this time, when the state of the pipe is adjusted, the pull head is released, at this time due to the reset force of the spring, the tooth plate will re-engage with the circular gear, so that the circular gear cannot rotate, so the special-shaped pipe cannot rotate after the state adjustment is completed, thereby completing the locking of the special-shaped pipe.

[0011] Furthermore, the outer surface of the rocker and the round knob is wrapped with a layer of soft material, and the soft material can be wrapped with a rubber pad. During frequent use by the user, the rubber pad can protect the user's hands.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The clamping device is provided with an annular steel plate and a plurality of telescopic mechanisms are evenly arranged on the annular steel plate. The special-shaped pipe is placed inside the annular steel plate. The corresponding telescopic mechanism is selected and used according to the specific external shape of the special-shaped pipe. The corresponding clamping tube clamps the outer surface of the special-shaped pipe after the clamping tube is extended. It has strong adaptability and can adapt to special-shaped pipes of various shapes. By setting a limiting slide rod and a limiting slide groove, the expansion and contraction and clamping of the clamping tube are very stable. Therefore, there will be no phenomenon of loose clamping due to wire withdrawal during the clamping process.

[0014] 2. The clamping device is also very convenient for adjusting the welding surface of special-shaped pipes. By turning the rocker, through the cooperation of the driving rod, the active pulley, the driven pulley, the transmission belt shaft, the rotating wheel and the annular steel plate, the special-shaped pipe can be adjusted to any side for welding, which is more convenient to use; at the same time, through the setting of the locking mechanism, the special-shaped pipe is fixed more firmly after adjustment, and the special-shaped pipe will not rotate during the welding process, thereby ensuring the stability of the welding.

[0015] 3. The clamping device has a simple structure, ingenious design, low manufacturing cost, and purely mechanical design, which is strong and durable. Since it has no electric drive, it has a low failure rate and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model.

[0018] Figure 2 This is a schematic diagram of the side structure of the annular steel plate in Example 1 of the utility model.

[0019] Figure 3 for Figure 1 Enlarged structural diagram at A in the middle.

[0020] Figure 4 for Figure 2 Enlarged structural diagram at B in the middle.

[0021] Figure 5 It is a schematic diagram of the side view structure of the annular steel plate in the second embodiment of the utility model.

[0022] Among them, the accompanying drawings are marked as follows: 1. base; 2. vertical plate; 3. rotating shaft; 4. rotating wheel; 5. annular steel plate; 6. telescopic mechanism; 7. driving rod; 8. rocker; 9. active pulley; 10. driven pulley; 11. transmission belt; 12. circular gear; 13. fixed shell; 14. cavity; 15. adjusting rod; 16. clamping cylinder; 17. limiting slide rod; 18. limiting slide groove; 19. pressure block; 20. round pancake knob; 21. fixed plate; 22. pull rod; 23. tooth plate; 24. pull head; 25. spring. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Of course, the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] Embodiment 1: Figure 1-4 As shown, this embodiment provides a clamping device for special-shaped pipes, including a base 1, vertical plates 2 are respectively arranged on both sides of the upper surface of the base 1, and a rotating shaft 3 is respectively rotatably arranged on the side where the two vertical plates 2 are close to each other, and a rotating wheel 4 is fixedly sleeved on the rotating shaft 3, and an annular steel plate 5 is respectively connected to the side where the two rotating wheels 4 are close to each other through a connecting rod, and four telescopic mechanisms 6 are evenly arranged on the outer wall of the annular steel plate 5, and the four telescopic mechanisms 6 can respectively extend into the inside of the annular steel plate 5 to clamp the special-shaped pipe; a driving rod 7 is also rotatably arranged between the two vertical plates 2. One end of the driving rod 7 rotates and passes through the corresponding vertical plate 2, and is connected with a rocker 8. Active pulleys 9 are respectively sleeved on both sides of the driving rod 7. Driven pulleys 10 are respectively sleeved on the outer surfaces of the two rotating shafts 3. A transmission belt 11 is connected between the two active pulleys 9 and the corresponding driven pulleys 10. A circular gear 12 is also sleeved on the outer wall of the driving rod 7. A locking mechanism that meshes with the circular gear 12 is provided on the vertical plate 2 on the same side as the circular gear 12. The locking mechanism can lock the circular gear 12 to prevent the circular gear 12 from rotating.

[0025] The telescopic mechanism 6 includes a fixed shell 13 connected to the outer wall of the annular steel plate 5, a cavity 14 is provided inside the fixed shell 13, an adjusting rod 15 is rotatably inserted on the side of the fixed shell 13 away from the annular steel plate 5, and a clamping cylinder 16 is threadedly connected to the outer surface of the adjusting rod 15 located in the cavity 14. The clamping cylinder 16 slides through the outer wall of the annular steel plate 5 away from the end of the adjusting rod 15. By rotating the adjusting rod 15, the clamping cylinder 16 can be driven to perform telescopic movement. Therefore, the telescopic distance of the clamping cylinder 16 can be adjusted according to the specific shape of the outer surface of the special-shaped pipe, so that the outer surfaces of different special-shaped pipes can be clamped; the outer wall of the clamping cylinder 16 is connected to a limiting slide bar 17, and the side wall of the cavity 14 is provided with a limiting slide groove 18 that cooperates with the end of the limiting slide bar 17. During the telescopic movement of the clamping cylinder 16, the limiting slide bar 17 will be driven to slide in the limiting slide groove 18, and the limiting slide groove 18 acts on the limiting slide bar 17 The limiting slide bar 17 and the limiting slide groove 18 can, on the one hand, enable the clamping tube 16 to perform telescopic movement stably, thereby preventing the clamping tube 16 from rotating with the adjusting rod 15 during the rotation of the adjusting rod 15; on the other hand, the clamping force of the clamping tube 16 can be kept unchanged, and the clamping tube 16 will not be de-threaded due to vibration, thereby causing the clamping force to loosen; a pressure block 19 made of rubber material is provided at one end of the clamping tube 16 away from the adjusting rod 15. The pressure block 19 can, on the one hand, prevent the excessive pressure of the clamping tube 16 from damaging the special-shaped pipe, and on the other hand, increase the friction between the clamping tube 16 and the special-shaped pipe to avoid slipping during the clamping process; a round knob 20 is provided at the end of the adjusting rod 15 located outside the fixed shell 13. The setting of the round knob 20 makes it convenient for the user to drive the adjusting rod 15 to rotate through the round knob 20.

[0026] The locking mechanism includes a fixed plate 21 arranged on the side wall of the vertical plate 2, a pull rod 22 is slidably inserted on the fixed plate 21, a tooth plate 23 meshing with the circular gear 12 is arranged at one end of the pull rod 22, and a pull head 24 is connected to the other end, and a spring 25 is connected between the tooth plate 23 and the fixed plate 21. When the welding of one side of the special-shaped pipe is completed and it needs to be adjusted to the other side, the pull head 24 is pulled upward, and the pull head 24 drives the pull rod 22 and the tooth plate 23 to move in a direction away from the circular gear 12, and the tooth plate 23 is separated from the circular gear 12. The spring 25 is in a compressed state. When the state of the pipe is adjusted, the pull head 24 is released. At this time, due to the restoring force of the spring 25, the tooth plate 23 will re-engage with the circular gear 12, making the circular gear 12 unable to rotate. Therefore, the special-shaped pipe cannot rotate after the state is adjusted, thereby completing the locking of the special-shaped pipe. The outer surface of the rocker 8 and the round pancake knob 20 is wrapped with a layer of soft material. The soft material can be wrapped with a rubber pad. During frequent use by the user, the rubber pad can protect the user's hands.

[0027] When in use, put the two ends of the special-shaped pipe into the annular steel plate 5, and according to the specific shape of the special-shaped pipe, rotate the round knobs 20 in the four telescopic mechanisms 6 in the positive direction respectively, and the round knobs 20 drive the adjusting rod 15 to rotate, and the clamping cylinder 16 threadedly matched with the adjusting rod 15 will move toward the direction of the special-shaped pipe. During this process, the limiting slide bar 17 will slide in the limiting slide groove 18 to limit and guide the clamping cylinder 16. After the four pressing blocks 19 are in contact with the special-shaped pipe, they are pressed tightly to complete the clamping of one end of the special-shaped pipe, and the other end is clamped in the same way. Since each telescopic mechanism 6 can make the clamping cylinder 16 extend to different distances, the clamping mechanism can adapt to special-shaped pipes of different shapes. After the two ends of the pipe are fully clamped, the special-shaped pipe can be welded;

[0028] When it is necessary to perform welding operation on the other side of the pipe, pull the pull head 24, the pull head 24 drives the pull rod 22 and the tooth plate 23 away from the circular gear 12, and the circular gear 12 is separated from the tooth plate 23. At this time, the spring 25 is in a compressed state, and then the rocker 8 is turned, and the rocker 8 drives the driving rod 7 to rotate. The driving rod 7 makes the two rotating shafts 3 rotate synchronously through the cooperation of the active pulleys 9, the driven pulleys 10 and the transmission belt 11 on both sides. The rotating shaft 3 can rotate the special-shaped pipe through the cooperation of the rotating wheel 4 and the annular steel plate 5. When the special-shaped pipe is adjusted to the welding working surface, release the pull head 24. Due to the reset effect of the spring 25, the tooth plate 23 can be re-engaged with the circular gear 12, and then the adjusted state of the special-shaped pipe can be locked so that it will not rotate again. At this time, the special-shaped pipe can be welded, which is flexible and convenient, and can be operated and processed on any surface of the pipe, which is easy to use.

[0029] Embodiment 2: Based on the embodiment 1, the driving rod 7 and the rotating shaft 3 may also be driven by gears, thereby replacing the driving pulley 9, the driven pulley 10 and the transmission belt 11;

[0030] like Figure 5 , six or more telescopic mechanisms 6 are arranged on the annular steel plate 5 to adapt to the special-shaped pipes with polygonal outer surfaces;

[0031] In order to ensure that the clamping force of the clamping cylinder 16 on the special-shaped pipe will not be weakened, a locking mechanism can also be provided in each telescopic mechanism 6, and the locking mechanism locks the adjustment rod 15 to ensure that the clamping force on the special-shaped pipe will not change.

[0032] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A clamping device for special-shaped pipes, comprising a base (1), characterized in that: Vertical plates (2) are respectively arranged on both sides of the upper surface of the base (1); a rotating shaft (3) is rotatably arranged on the adjacent sides of the two vertical plates (2); a rotating wheel (4) is fixedly sleeved on the rotating shaft (3); an annular steel plate (5) is respectively connected to the adjacent sides of the two rotating wheels (4) via a connecting rod; a plurality of telescopic mechanisms (6) are evenly arranged on the outer side wall of the annular steel plate (5); and the plurality of telescopic mechanisms (6) can respectively extend into the interior of the annular steel plate (5) to clamp the special-shaped pipe; A driving rod (7) is rotatably arranged between the two vertical plates (2), one end of which is rotatably passed through the corresponding vertical plate (2) and is connected to a rocker (8), driving pulleys (9) are respectively sleeved on both sides of the driving rod (7), driven pulleys (10) are respectively sleeved on the outer surfaces of the two rotating shafts (3), and a transmission belt (11) is respectively connected between the two driving pulleys (9) and the corresponding driven pulleys (10), and a circular gear (12) is also sleeved on the outer wall of the driving rod (7), and a locking mechanism meshing with the circular gear (12) is arranged on the vertical plate (2) on the same side as the circular gear (12), and the locking mechanism can lock the circular gear (12) to prevent the circular gear (12) from rotating.

2. A clamping device for special-shaped pipes according to claim 1, characterized in that: The telescopic mechanism (6) comprises a fixed shell (13) connected to the outer wall of the annular steel plate (5), a cavity (14) is provided inside the fixed shell (13), an adjusting rod (15) is rotatably inserted on the side of the fixed shell (13) away from the annular steel plate (5), a clamping tube (16) is threadedly connected to the outer surface of the adjusting rod (15) located in the cavity (14), and the clamping tube (16) slides through the outer wall of the annular steel plate (5) at one end away from the adjusting rod (15).

3. A clamping device for special-shaped pipes according to claim 2, characterized in that: The outer side wall of the clamping cylinder (16) is connected to a limiting sliding rod (17), and the side wall of the cavity (14) is provided with a limiting sliding groove (18) that cooperates with the end of the limiting sliding rod (17).

4. A clamping device for special-shaped pipes according to claim 3, characterized in that: A pressing block (19) made of rubber material is arranged at one end of the clamping tube (16) away from the adjusting rod (15).

5. The clamping device for special-shaped pipes according to claim 4, characterized in that: A round knob (20) is provided at the end of the adjusting rod (15) located outside the fixed shell (13).

6. The clamping device for special-shaped pipes according to claim 1, characterized in that: The locking mechanism comprises a fixed plate (21) arranged on the side wall of the vertical plate (2), a pull rod (22) is slidably inserted on the fixed plate (21), one end of the pull rod (22) is provided with a tooth plate (23) meshing with the circular gear (12), and the other end is connected to a pull head (24), and a spring (25) is connected between the tooth plate (23) and the fixed plate (21).

7. The clamping device for special-shaped pipes according to claim 5, characterized in that: The outer surfaces of the rocker (8) and the round knob (20) are wrapped with a layer of soft material.

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