A clamping device for thin-walled steel pipes
By combining internal support and external clamping mechanisms, the deformation problem of thin-walled steel pipes during clamping is solved, achieving stable clamping and adapting to the needs of steel pipes of different specifications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BAOFENG STEEL GRP
- Filing Date
- 2025-06-04
- Publication Date
- 2026-05-26
AI Technical Summary
In existing technologies, thin-walled steel pipes are prone to deformation during clamping, which affects fluid transport or structural stability. The traditional three-jaw chuck single-sided clamping solution is not suitable for thin-walled steel pipes.
Design a clamping device that includes an inner support and an outer clamping mechanism. The steel pipe is clamped simultaneously by the inner support plate and the outer clamping plate. Both the inner support plate and the outer clamping plate are adjustable to accommodate steel pipes of different specifications. Stable clamping is achieved by using components such as cylinders and magnets.
It effectively avoids deformation of steel pipes during clamping, improves clamping tightness and adaptability, and is suitable for thin-walled steel pipes of different specifications.
Smart Images
Figure CN224274769U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of thin-walled steel pipe technology, and in particular to a clamping device for thin-walled steel pipe. Background Technology
[0002] Thin-walled steel pipes are steel pipes with relatively thin walls, and they are commonly used in fields such as construction, machinery manufacturing, and vehicle manufacturing.
[0003] Because thin-walled steel pipes have thin walls, they naturally tend to deform during clamping. Currently, the common clamping method for steel pipes is to use a three-jaw chuck for external single-sided clamping. This single-sided clamping method is prone to causing local collapse of the steel pipe, affecting fluid transport or the structural stability of the steel pipe itself. Therefore, it is necessary to design a clamp that is suitable for clamping thin-walled steel pipes, to avoid deformation during clamping, and to improve the yield rate. Utility Model Content
[0004] In view of the shortcomings of the prior art, the present invention provides a clamping device for thin-walled steel pipes to solve the problems mentioned in the background art.
[0005] This utility model provides the following technical solution: a clamping device for thin-walled steel pipes, including a base plate, wherein the base plate is provided with an inner support mechanism and an outer clamping mechanism;
[0006] The external clamping mechanism includes a mounting plate fixed to the base plate, and the mounting plate has a mounting hole that extends from left to right to accommodate a steel pipe. Multiple first-order sliding grooves are provided at equal angles in the curved surface of the mounting hole, and an external clamping plate is slidably connected in the first-order sliding groove in the direction of the axis of the mounting hole. It also includes an external clamping control component for controlling the inner and outer positions of the external clamping plate.
[0007] The internal support mechanism includes an upright plate disposed on the base plate, an inner column fixedly disposed on the side of the upright plate and inserted into the mounting hole, and a second slide groove corresponding to the position of the first slide groove and having the same number as the first slide groove is disposed at equal angles on the curved surface of the inner column. An internal support plate is slidably connected in the second slide groove, and the mechanism also includes an internal support control component for controlling the inner and outer positions of the internal support plate.
[0008] Preferably, the external clamp control assembly includes a first cylinder fixed inside the mounting plate, and a push ring is connected to the end of the first piston rod inside the first cylinder;
[0009] The left side of the first slide groove is provided with an outwardly penetrating connecting groove, and a push plate is installed in the connecting groove. The side of the push plate near the axis of the mounting hole and its right side are chamfered to form a first inclined surface. The outer side of the outer clamping plate and its left side are chamfered to form a second inclined surface that is attached to the first inclined surface. Each of the push plates extends out of the connecting groove and is connected to the push ring. The outer clamping plate is also connected to the bottom surface of the first slide groove by a first spring.
[0010] Preferably, there are two cylinders arranged vertically.
[0011] Preferably, the internal support control assembly includes an inner hole disposed within the inner column and communicating with each of the second slide grooves. The inner support plate extends into the inner hole, and its inner side surface is chamfered with its left side surface to form a third inclined surface. A push rod is slidably connected to the inner hole, and the right end surface of the push rod is chamfered with its curved surface, so that the push rod can push the inner support plate outward through the third inclined surface. A second cylinder is fixed on the left side of the upright plate, and the second piston rod in the second cylinder is connected to the push rod.
[0012] The inner support plate is also equipped with magnets that can attract each other.
[0013] Preferably, it also includes an arc panel that can be fixed to the sides of the outer clamping plate and the inner support plate that are close to each other by a locking assembly.
[0014] Preferably, the outer clamping plate and the inner support plate are respectively provided with slots on their left and right sides, and the locking assembly includes hook plates fixed on the arc panel and capable of being inserted into the slots from the left and right.
[0015] Preferably, the outer clamping plate and the inner support plate extend in the front-rear direction on one side of the mounting hole to fit against the arc panel.
[0016] Preferably, the upright plate is fixed to the base plate by bolts.
[0017] This utility model provides a clamping device for thin-walled steel pipes, which has the following advantages:
[0018] This utility model can clamp steel pipes simultaneously through both internal support and external clamping, avoiding possible deformation of the steel pipes when clamped, and the simultaneous internal and external clamping method further improves the clamping tightness.
[0019] Both the outer clamping plate and the inner support plate of this utility model are fixed with arc panels. Workers can change the arc panels with different curvatures and thicknesses according to the specifications of the steel pipe to be clamped, so that this utility model can be adapted to steel pipes of different specifications. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the appearance of this utility model;
[0021] Figure 2 This is a schematic diagram of the structure within this utility model;
[0022] Figure 3 yes Figure 1 Enlarged view of point A in the middle;
[0023] Figure 4 This is a schematic diagram of the appearance of this utility model from another perspective.
[0024] In the picture:
[0025] 11. Base plate; 21. Mounting plate; 22. Mounting hole; 23. Outer clamping plate; 31. Vertical plate; 32. Inner column; 33. Inner support plate; 34. Cylinder No. 1; 35. Push ring; 36. Push plate; 41. Inner hole; 42. Top rod; 43. Cylinder No. 2; 44. Magnet; 51. Arc panel; 52. Hook plate. Detailed Implementation
[0026] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.
[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0030] Reference Figures 1-4 According to an embodiment of the clamping device for thin-walled steel pipes of the present invention, a base plate 11 is provided, and an inner support mechanism and an outer clamping mechanism are provided on the base plate 11.
[0031] The external clamping mechanism includes a mounting plate 21 fixed to the base plate 11. The mounting plate 21 has mounting holes 22 that extend from left to right to accommodate steel pipes. Multiple first-order sliding grooves are provided at equal angles within the curved surface of the mounting holes 22. Figure 1 There are three of them), and an outer clamping plate 23 is slidably connected in the first groove toward the axis of the mounting hole 22. It also includes an outer clamping control component for controlling the inner and outer positions of the outer clamping plate 23. In this embodiment, the outer clamping control component includes a first cylinder 34 fixed in the mounting plate 21, and a push ring 35 is connected to the end of the first piston rod in the first cylinder 34.
[0032] The left side of the first slide groove is provided with an outwardly penetrating connecting groove, and a push plate 36 is installed in the connecting groove. The side of the push plate 36 near the axis of the mounting hole 22 and its right side are chamfered to form a first inclined surface. The outer side of the outer clamping plate 23 and its left side are chamfered to form a second inclined surface that is attached to the first inclined surface. Each push plate 36 extends out of the connecting groove and is connected to the push ring 35. The outer clamping plate 23 is also connected to the bottom surface of the first slide groove by a spring.
[0033] When the first cylinder 34 drives the push ring 35 to move to the right, it will cause the push plate 36 to move to the right, and then push the outer clamping plate 23 inward through the first inclined surface and the second inclined surface, so that the steel pipe located in the mounting hole 22 can be clamped by the outer clamping plate 23.
[0034] When the push plate 36 moves to the left, the outer clamping plate 23 will retract under the action of the spring to release the external clamping of the steel pipe.
[0035] To ensure stable movement of the push ring 35 when pulled by the first piston rod, two first cylinders 34 are provided and distributed vertically. Specifically, the first cylinder 34 located on the upper side is fixed to the upper end of the mounting plate 21, and the first cylinder 34 located on the lower side is fixed in the mounting groove inside the mounting plate 21. The two first cylinders 34 are equidistant from the axis of the mounting hole 22.
[0036] The internal support mechanism includes a vertical plate 31 mounted on the base plate 11. An inner column 32, inserted into the mounting hole 22, is fixedly mounted on the side of the vertical plate 31. A second slide groove, corresponding to the position of the first slide groove and having the same number as the first slide groove, is provided at equal angles within the curved surface of the inner column 32. An inner support plate 33 is slidably connected within the second slide groove. The mechanism also includes an internal support control component for controlling the inner and outer positions of the inner support plate 33. The internal support control component includes components disposed within the inner column 32 and connected to each of the mounting holes 22. The inner hole 41 of the second slide is provided with an inner support plate 33 extending into the inner side of the inner hole 41 and its left side, which are chamfered to form a third inclined surface (arc-shaped). A push rod 42 is slidably connected to the inner hole 41, and the right end face of the push rod 42 is chamfered to its curved surface, so that the push rod 42 can push the inner support plate 33 outward through the third inclined surface. A second cylinder 43 is fixed on the left side of the vertical plate 31, and the second piston rod in the second cylinder 43 is connected to the push rod 42.
[0037] The inner support plate 33 is also provided with magnets 44 that can attract each other, or a magnetic rod can be installed at the right end axis of the inner hole 41 to attract the magnets 44.
[0038] When the second cylinder 43 drives the push rod 42 to move to the right, the inner support plate 33 will be squeezed outward, thereby supporting the steel pipe in the mounting hole 22.
[0039] When the top rod 42 moves to the left, and the magnets 44 attract each other or are attracted by the magnetic rod, each of the inner support plates 33 will retract inward to release the inner support and fixing function of the steel pipe.
[0040] In a second embodiment of the clamping device for thin-walled steel pipes, in order to improve the service life and clamping friction of the clamping device for thin-walled steel pipes and to further adapt to steel pipes of different specifications, an arc panel 51 is also included. The arc panel 51 can be fixed to the side of the outer clamping plate 23 and the inner support plate 33 that are close to each other by a locking assembly.
[0041] Specifically, the outer clamping plate 23 and the inner support plate 33 are respectively provided with slots on their left and right sides, and the locking assembly includes a hook plate 52 fixed on the arc panel 51 and capable of being inserted into the slots on the left and right.
[0042] The hook plate 52 can be first hung in the slot and then fixed to the arc panel 51 by bolts or other fasteners, thereby realizing the locking installation of the arc panel 51 with the outer clamping plate 23 or the inner support plate 33.
[0043] Workers can replace the arc panel 51 with different curvatures and thicknesses according to the required steel pipe specifications, so that the clamping device for thin-walled steel pipes can be adapted to steel pipes of different specifications.
[0044] like Figure 3 As shown, the outer clamping plate 23 and the inner support plate 33 extend in the front-back direction on one side of the mounting hole 22 to have a larger contact area with the arc panel 51.
[0045] The end face of the arc panel 51 is also provided with a hook ring to facilitate placement and transportation, and the hook ring will not extend to the arc surface of the arc panel 51 to avoid possible interference with the steel pipe.
[0046] In a third embodiment of the clamping device for thin-walled steel pipes, when the vertical plate 31 is removed, the clamping device can still clamp the steel pipe using only the outer clamping plate 23. When the vertical plate 31 is removed, the clamping device can clamp steel pipes with smaller diameters. The vertical plate 31 is fixed to the base plate 11 with bolts for easy removal.
[0047] Specific workflow:
[0048] First, the workers install the arc panel 51 onto each of the outer clamping plates 23 and the inner support plate 33. Then, the workers put the steel pipe around the inner column 32 and insert it into the mounting hole 22. The steel pipe can also abut against the wall of the upright plate 31 for further limiting. Then, the workers control the first cylinder 34 to drive the push plate 36 to move to the right, and at the same time control the second cylinder 43 to make the top rod 42 move to the right. At this time, the outer clamping plate 23 moves inward and clamps the steel pipe, while the second cylinder 43 moves outward and supports the inner wall of the steel pipe to complete the clamping work of the steel pipe.
[0049] It should be noted that there are two clamping devices for thin-walled steel pipes that can be arranged facing each other to clamp a steel pipe.
[0050] It should be noted that a spring connected to the inner column 32 can be installed on the arc panel 51 of the inner support plate 33 to replace the function of the magnet 44 and the magnetic rod.
[0051] The above description is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.
Claims
1. A clamping device for thin-walled steel pipes, comprising a base plate (11), characterized in that: The base plate (11) is provided with an inner support mechanism and an outer clamping mechanism; The external clamping mechanism includes a mounting plate (21) fixed on the base plate (11), the mounting plate (21) has a mounting hole (22) that runs through the left and right to accommodate the steel pipe, the mounting hole (22) has a plurality of first-order sliding grooves at equal angles in the curved surface, and an external clamping plate (23) is slidably connected in the first-order sliding groove in the direction toward the axis of the mounting hole (22), and also includes an external clamping control component for controlling the inner and outer positions of the external clamping plate (23); The internal support mechanism includes a vertical plate (31) disposed on the base plate (11), an inner column (32) fixedly disposed on the side of the vertical plate (31) and inserted into the mounting hole (22), a second slide groove corresponding to the position of the first slide groove and the same number as the first slide groove is provided at equal angles in the curved surface of the inner column (32), an inner support plate (33) is slidably connected in the second slide groove, and an internal support control component for controlling the inner and outer positions of the inner support plate (33).
2. The clamping device for a thin-walled steel pipe according to claim 1, characterized in that: The external clamp control assembly includes a first cylinder (34) fixed inside the mounting plate (21), and a push ring (35) is connected to the end of the first piston rod inside the first cylinder (34). The left side of the first slide groove is provided with an outward through groove, and a push plate (36) is installed in the through groove. The side of the push plate (36) near the axis of the mounting hole (22) and its right side are chamfered to form a first inclined surface. The outer side of the outer clamping plate (23) and its left side are chamfered to form a second inclined surface that is attached to the first inclined surface. Each push plate (36) extends to the outside of the through groove and is connected to the push ring (35). The outer clamping plate (23) is also connected to the bottom surface of the first slide groove by a first spring.
3. The clamping device for a thin-walled steel pipe according to claim 2, characterized in that: There are two cylinders (34) arranged vertically.
4. The clamping device for a thin-walled steel pipe according to claim 1, characterized in that: The inner support control assembly includes an inner hole (41) disposed in the inner column (32) and connected to each of the second slide grooves. The inner support plate (33) extends to the inner side of the inner hole (41) and chamfers with its left side to form a third inclined surface. A push rod (42) is slidably connected to the inner hole (41) to the left and right. The right end face of the push rod (42) is chamfered with its curved surface so that the push rod (42) can push the inner support plate (33) outward through the third inclined surface. A second cylinder (43) is fixed on the left side of the upright plate (31). The second piston rod in the second cylinder (43) is connected to the push rod (42). The inner support plate (33) is also provided with magnets (44) that can attract each other.
5. The clamping device for a thin-walled steel pipe according to claim 1, characterized in that: It also includes an arc panel (51) that can be secured to the side of the outer clamping plate (23) and the inner support plate (33) that are close to each other by means of a locking assembly.
6. The clamping device for a thin-walled steel pipe according to claim 5, characterized in that: The outer clamping plate (23) and the inner support plate (33) are respectively provided with slots on their left and right sides. The locking assembly includes a hook plate (52) fixed on the arc panel (51) and capable of being inserted into the slots on the left and right.
7. The clamping device for a thin-walled steel pipe according to claim 5, characterized in that: The outer clamping plate (23) and the inner support plate (33) extend in the front-back direction on one side of the mounting hole (22) to fit between the arc panel (51).
8. The clamping device for a thin-walled steel pipe according to claim 1, characterized in that: The upright plate (31) is fixed to the base plate (11) by bolts.