Butt joint device for hot expanding of steel pipe

Abstract

The utility model particularly relates to the technical field of steel pipe machining, and discloses a butt joint device for steel pipe hot expanding, which comprises a workbench and a mounting seat movably connected to the surface of the workbench, a supporting rod is fixedly arranged on the side wall of the mounting seat, a plurality of arc-shaped supporting plates are movably connected to the outer surface of the supporting rod, and the arc-shaped supporting plates are fixedly connected to the side wall of the mounting seat. And two second air cylinders are symmetrically and fixedly arranged on the side wall, away from the supporting rod, of the mounting base, the output ends of the two second air cylinders penetrate through the mounting base and are fixedly provided with annular connecting rods, and limiting plates are fixedly arranged at the ends, close to the annular connecting rods, of the arc-shaped supporting plates. By arranging the mounting base, the second air cylinder, the supporting rod, the arc-shaped supporting plate, the annular connecting rod, the second connecting rod, the limiting plate and the third connecting rod, the second air cylinder can be started to push the annular connecting rod to horizontally move, so that the third connecting rod and the second connecting rod are matched, the distance between the arc-shaped supporting plate and the supporting rod is adjusted, and the steel pipe hot expanding range is enlarged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to steel pipe processing technical field especially relates to a butt joint device for steel pipe hot expanding. BACKGROUND

[0002] Steel pipe hot expanding is a kind of metal processing technology, and steel pipe hot expanding is mainly used to increase the diameter of steel pipe and improve its mechanical properties.Steel pipe hot expanding process usually adopts heating coil to heat steel pipe to reduce the strength of material and improve its plasticity, so that steel pipe is more easily expanded.The butt joint device is needed to expand the heated steel pipe during steel pipe hot expanding process.

[0003] Prior art scheme such as announcement number: CN210498016U the utility model discloses a steel pipe hot expanding core rod, including core rod body, core rod body includes import section, deformation section, sizing section, flat section and straightening section, the outer diameter of deformation section is sequentially increased along the hot expanding direction, and the core rod body is hollow structure to form internal space, and the internal space is installed with reinforcing assembly, and the reinforcing assembly includes first reinforcing ring, reinforcing rib plate, second reinforcing ring, the first reinforcing ring is fixedly connected with import section, the reinforcing rib plate is in interference fit with the inner wall of deformation section, one end of reinforcing rib plate is fixedly connected with the first reinforcing ring, and the other end of reinforcing rib plate is fixedly connected with the first end of second reinforcing ring, and the second end of second reinforcing ring is arranged with multiple mutually parallel reinforcing rods, and the reinforcing rod is fixedly connected with straightening section at the end in radial direction.The utility model adopts hollow structure design, and sets up reinforcing assembly in its internal space, and then effectively reduces the weight of core rod under the premise of guaranteeing that the core rod has enough rigidity and strength.

[0004] The above technical scheme has the following technical problems: the butt joint device for steel pipe hot expanding is usually of fixed size, thereby affecting the applicable range of steel pipe hot expanding processing. UTILITY MODEL CONTENTS

[0005] The utility model provides a butt joint device for steel pipe hot expanding, aims at solving the problem that the butt joint device for steel pipe hot expanding is usually of fixed size, thereby affecting the applicable range of steel pipe hot expanding processing.

[0006] The utility model discloses a butt joint device for steel pipe hot expanding, which comprises a workbench and a mounting seat movably connected to the surface of the workbench, a support rod fixed to the side wall of the mounting seat, a plurality of arc-shaped supporting plates movably connected to the outer surface of the support rod, two air cylinders II symmetrically fixed to the side wall of the mounting seat away from the support rod, an annular connecting rod fixed to the output end of each air cylinder II, a limiting plate fixed to the end of each arc-shaped supporting plate close to the annular connecting rod, a plurality of connecting rods III rotatably connected to the side wall of the annular connecting rod, and a plurality of connecting rods IV rotatably connected to the side wall of the limiting plate in sequence.

[0007] Preferably, a heat insulation furnace is fixed to the middle of the top end of the workbench, a heating coil is fixed to the middle of the heat insulation furnace, and the heating coil is helical and located in the same horizontal direction as the support rod, thereby improving the convenience of steel pipe installation and positioning.

[0008] Preferably, an air cylinder I is fixed to the end of the workbench, a sliding seat is fixed to the bottom end of the mounting seat to form an integral structure, and the output end of the air cylinder I is fixed to the side wall of the sliding seat, thereby improving the convenience of horizontal movement of the mounting seat.

[0009] Preferably, a slot I is formed in the surface of the workbench for the sliding movement of the sliding seat, and the external dimension of the sliding seat is matched with the internal dimension of the slot I, thereby improving the stability of the movement of the mounting seat.

[0010] Preferably, the plurality of arc-shaped supporting plates are symmetrically distributed on the outer surface of the support rod, a plurality of slots II are symmetrically formed in the side wall of the support rod, the other end of each connecting rod III is rotatably connected to the inside of each slot II in sequence, and the internal dimension of each slot II is matched with the external dimension of each connecting rod III in sequence, thereby improving the stability of the synchronous rotation of the connecting rods III.

[0011] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0012] Firstly, the mounting seat, the air cylinder II, the support rod, the arc-shaped supporting plate, the annular connecting rod, the connecting rod II, the limiting plate and the connecting rod III are arranged, the annular connecting rod can be horizontally moved by starting the air cylinder II, the connecting rod III and the connecting rod II are cooperated to adjust the distance between the arc-shaped supporting plate and the support rod, thereby expanding the range of steel pipe hot expanding; and secondly, the slot II is arranged, the internal dimension of the slot II is matched with the external dimension of the connecting rod III in sequence, thereby improving the stability of the synchronous rotation of the connecting rod III. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a side view of the installation structure of the utility model.

[0014] Figure 2The utility model discloses a front view three-dimensional structure schematic diagram.

[0015] Figure 3 The utility model discloses a top view section installation structure schematic diagram.

[0016] Figure 4 The utility model discloses a side view plane structure schematic diagram.

[0017] The drawing sign is: 1, workstation, 2, mounting seat, 3, sliding seat, 4, cylinder one, 5, cylinder two, 6, support rod, 7, arc supporting plate, 8, heat insulation stove, 9, heating coil, 10, notched one, 11, annular connecting rod, 12, connecting rod two, 13, limit plate, 14, connecting rod three, 15, notched two. DETAILED DESCRIPTION

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting upon the application; the description and the drawings are to be regarded as illustrative in nature and definitions in the specification and the appended claims are to be interpreted consistently with this spirit and scope of the application; the terms "comprising," "having," "including," and "containing" are to be construed as open-ended terms (i.e., meaning "including, but not limited to,") unless otherwise noted; the terms "first," "second," and the like, as used herein do not have any specific meaning unless otherwise noted.

[0019] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily referring to the same embodiment nor are separate or alternative embodiments mutually exclusive of other embodiments. It is expressly understood that the embodiments described herein are merely examples from a multitude of embodiments that are in substantial compliance with the principles of the application. It is further expressly understood that the embodiments described herein are in substantial compliance with the principles of the application.

[0020] Please refer to Figures 1-4The utility model provides an embodiment: a butt joint device for steel pipe hot expansion, including work table 1 and movable connection in the surface mounting seat 2 of work table 1, the side wall of mounting seat 2 is fixed with support rod 6 through bolt, the outer surface movable connection of support rod 6 has a plurality of arc shaped supporting plate 7, a plurality of arc shaped supporting plate 7 all symmetrically distribute in the outer surface of support rod 6, and the end of support rod 6 is tapered to facilitate support rod 6 to be inserted in the middle of heating steel pipe, and the middle of work table 1 top is fixed with heat -proof furnace 8, and heat -proof furnace 8's middle is fixed with heating coil 9, and heating coil 9 is spiral and is located in the same horizontal direction with support rod 6, and heating coil 9 is copper material and can evenly heat steel pipe after power on, and steel pipe is clamped by propelling device to carry out linear motion, and propelling device is prior art, and here will not be repeated, can improve the convenience of steel pipe reaming installation positioning, and the side wall of mounting seat 2 away from support rod 6 is fixed with two air cylinders two 5 symmetrically, and the output of two air cylinders two 5 all is fixed with annular connecting rod 11 and penetrates mounting seat 2, and the end of arc shaped supporting plate 7 near annular connecting rod 11 all is fixed with limit plate 13, and the side wall of annular connecting rod 11 is rotatably connected with a plurality of connecting rod two 12, and the other end of connecting rod two 12 is sequentially rotatably connected on the side wall of limit plate 13, and the side wall of arc shaped supporting plate 7 near support rod 6 all are rotatably connected with a plurality of connecting rod three 14, and the side wall of support rod 6 is symmetrically provided with a plurality of slot two 15, and the other end of connecting rod three 14 is sequentially rotatably connected in the inside of slot two 15, and starting two air cylinders two 5 can drive annular connecting rod 11 horizontal movement, and annular connecting rod 11 drives connecting rod two 12 to drive arc shaped supporting plate 7 to rotate around connecting rod three 14 sequentially, to change the distance of arc shaped supporting plate 7 and support rod 6, to realize pipe hot expansion, and operating personnel control the distance of annular connecting rod 11 horizontal movement accurately, to control the angle of rotation of connecting rod three 14, to control the distance of arc shaped supporting plate 7 displacement accurately, to improve the range of steel pipe hot expansion adaptation.

[0021] The end of work table 1 is fixed with cylinder one 4, and the bottom end of mounting seat 2 is fixed with sliding seat 3 to constitute an integral structure, and the output end of cylinder one 4 is fixed on the side wall of sliding seat 3, to improve the convenience of mounting seat 2 horizontal movement, and the surface of work table 1 is provided with slot one 10 for sliding seat 3 to slide, and the outside dimension of sliding seat 3 is adapted to the inside dimension of slot one 10, to improve the stability of mounting seat 2 movement, and starting cylinder one 4 can drive sliding seat 3 to slide in the inside of slot one 10, to facilitate adjusting the distance of support rod 6 and heat -proof furnace 8.

[0022] The inside dimension of slot two 15 is sequentially adapted to the outside dimension of connecting rod three 14, and slot two 15 can limit the lateral displacement of connecting rod three 14, to improve the stability of connecting rod three 14 synchronous rotation.

[0023] Working principle: the butt joint device for steel pipe hot expansion in use, the operator first connects the power supply, the steel pipe is moved to the middle of the heating coil 9 through the propulsion device, so that the steel pipe is uniformly heated, the heated steel pipe is sequentially sleeved on the end of the supporting rod 6 and the outer surface of the arc-shaped supporting plate 7, when the arc-shaped supporting plate 7 is completely inserted into the inside of the steel pipe, the operator starts the cylinder two 5, which can drive the annular connecting rod 11 to move horizontally, thereby driving the connecting rod two 12 to drive the arc-shaped supporting plate 7 to rotate around the connecting rod three 14 in turn, so as to change the distance between the arc-shaped supporting plate 7 and the supporting rod 6, so as to realize the hot expansion of the pipeline, the operator controls the displacement distance of the arc-shaped supporting plate 7 by accurately controlling the horizontal movement distance of the annular connecting rod 11, so as to control the rotating angle of the connecting rod three 14, thereby accurately controlling the displacement distance of the arc-shaped supporting plate 7, so as to improve the range of steel pipe hot expansion adaptation.

[0024] Secondly, the outer dimension of the connecting rod three 14 is matched with the inner dimension of the slot two 15 in turn, so as to improve the stability of the rotating support of the connecting rod three 14.

[0025] It should be noted that, for the foregoing embodiments, in order to simply describe, they are all expressed as a series of action combinations, but those skilled in the art should know that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other order or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily necessary for the present application.

[0026] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented by other ways. For example, the device embodiments described above are only illustrative, for example, the division of the above units, actual implementation can have another division way, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point, the coupling or communication connection between the displayed or discussed each other can be through some interface, indirect coupling or communication connection between devices or units, which can be electrical or other forms.

[0027] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. According to actual needs, part or all of the units can be selected to realize the purpose of the embodiment scheme.

[0028] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the protection scope of the present application. Obviously, the described examples are only some of the embodiments of the present application, not all the embodiments. Based on these examples, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application. Although the present application has been described in detail with reference to the above examples, those of ordinary skill in the art can still combine, add or delete the features in the embodiments of the present application according to the circumstances without creative labor, so as to obtain different other technical solutions which do not deviate from the concept of the present application in essence, and these technical solutions also fall within the scope of the present application.

Claims

1. A butt joint device for hot expansion of steel pipes, characterized in that, The utility model provides a kind of workbench, including workbench (1) and movablely connected mounting seat (2) on the surface of workbench (1):Supporting rod (6) is fixed on the side wall of mounting seat (2), the outer surface of supporting rod (6) is movably connected with several arc-shaped supporting plates (7), two air cylinders two (5) are symmetrically fixed on the side wall of mounting seat (2) away from supporting rod (6), the output end of two air cylinders two (5) is fixed with annular connecting rod (11) penetrating mounting seat (2), the end of arc-shaped supporting plate (7) close to annular connecting rod (11) is fixed with limiting plate (13), several connecting rods two (12) are rotatably connected on the side wall of annular connecting rod (11), the other end of connecting rod two (12) is rotatably connected on the side wall of limiting plate (13) in sequence, several connecting rods three (14) are rotatably connected on the side wall of arc-shaped supporting plate (7) close to supporting rod (6).

2. The butt joint device for hot expansion of steel pipes according to claim 1, characterized in that: The middle of the top of workbench (1) is fixed with heat-insulating furnace (8), the middle of heat-insulating furnace (8) is fixed with heating coil (9), and heating coil (9) is spiral and in the same horizontal direction with supporting rod (6).

3. The butt joint device for hot expansion of steel pipes according to claim 1, characterized in that: The end of workbench (1) is fixed with air cylinder one (4), the bottom of mounting seat (2) is fixed with sliding seat (3) to form an integrated structure, and the output end of air cylinder one (4) is fixed on the side wall of sliding seat (3).

4. The butt joint device for hot expansion of steel pipes according to claim 1, characterized in that: The surface of workbench (1) is provided with slot one (10) for sliding seat (3) to slide, and the outer dimension of sliding seat (3) is matched with the inner dimension of slot one (10).

5. The butt joint device for hot expansion of steel pipes according to claim 1, characterized in that: Several arc-shaped supporting plates (7) are symmetrically distributed on the outer surface of supporting rod (6), several slot two (15) are symmetrically provided on the side wall of supporting rod (6), the other end of connecting rod three (14) is rotatably connected in sequence in the inside of slot two (15), and the inner dimension of slot two (15) is matched with the outer dimension of connecting rod three (14) in sequence.

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