A reducer for profiled pipes

Abstract

The application discloses a reducing device for special-shaped pipes, which comprises a special-shaped pipe, a receiving groove, a pusher, and a roller. The roller comprises a first sliding block, a second sliding block, a first rocker, a second rocker, and a plurality of aperture petals arranged at the axial position. The first sliding block and the second sliding block are slidably arranged at the midpoint position of any side of the regular hexagon and move in a fan shape along the midpoint and the endpoint of the side. One end of the first rocker is fixedly connected with the first sliding block, and the other end of the first rocker is connected with a driving motor. Under the action of the driving motor, the first rocker is driven to move in a fan shape along the midpoint and the endpoint of the side. The first rocker is driven to rotate at an angle in the range of 0-30°. According to the requirements of the inner diameter size of the rolled special-shaped pipe, the inner diameter of the rolling opening is changed, so that the inner diameter of the rolling opening can be uniformly expanded or reduced on line, the labor input is reduced, and the work efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of special-shaped pipe rolling technology, and specifically relates to a diameter changing device for special-shaped pipes. Background Technology

[0002] With the deepening development of society, nuclear energy, as a clean energy source, will play an increasingly important role in future social development. China actively participates in the ITER project, an international large-scale scientific project aimed at solving humanity's future energy needs. The armor portion used for the PF conductor is a shaped tube with an inner square and an outer circle. In the field of marine engineering, shaped tubes are widely used in various structural components, tools, and mechanical parts. Compared to round tubes, stainless steel shaped tubes generally have a larger moment of inertia and section modulus, resulting in greater bending and torsional resistance, which can significantly reduce structural weight and save steel. Shaped tubes have many advantages, but their manufacturing is challenging. Mold design is a key difficulty in the manufacturing process, requiring consideration of the influence of the tube's dimensions, as well as the material's strength and related physical properties.

[0003] With the deepening development of nuclear energy, special-shaped pipes (square and round pipes, hexagonal pipes, octagonal pipes, etc.) are being used more and more widely in energy, marine engineering and other fields. The advantages of special-shaped pipes are being brought into full play, the environment in which they are used is becoming more and more demanding, and the requirements for dimensional accuracy (especially straightness (local straightness, overall straightness) and torsion) are becoming higher and higher, which puts forward higher requirements and greater challenges to the production of special-shaped pipes.

[0004] However, in the process of implementing the inventive technical solution in the embodiments of this application, the inventors of this application discovered that the above-mentioned technology has at least the following technical problems:

[0005] A single rolling line can only produce special-shaped pipes of a single specification. Rolling special-shaped pipes of different specifications or sizes requires stopping work and changing to rolls of different specifications on the line, which increases manual labor and reduces work efficiency. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this application provides a diameter-changing device for shaped pipes, which solves the technical problem of needing to stop work and replace rollers of different specifications offline when rolling shaped pipes of different specifications or sizes. Under the action of the drive motor, the drive rocker arm drives the slider to make a fan-shaped motion, so that the inner diameter of the rolling end can be uniformly expanded or reduced online, rolling shaped pipes of different specifications or sizes, reducing the input of manpower and improving work efficiency.

[0007] This application provides a diameter-changing device for shaped pipes, including: shaped pipes, a receiving trough for heating and softening the shaped pipes, a pusher, and rolling mills. The pusher is located on one side of the receiving trough, and its pushing inlet faces the rolling inlet of the rolling mills. The rolling mills include a cylindrical outer layer and a regular hexagonal inner layer. The inner layer includes: a first slider, a second slider, a first rocker arm, a second rocker arm, and aperture lobes arranged in an array at the axial center. The first slider and the second slider are slidably disposed within the regular hexagonal... At the midpoint of any side, the angle between the first slider and the second slider is 120°, and they move in a fan shape along the midpoint and endpoint of their respective sides. The first slider and the second slider move in opposite directions. One end of the first rocker is fixedly connected to the first slider, and the other end of the first rocker is connected to the drive motor. The rotation angle of the first rocker is 0-30°. One end of the second rocker is fixedly connected to the second slider, and the other end of the second rocker is movably connected to the first rocker. The aperture petal is detachably connected to the inner layer of the roller.

[0008] Preferably, this application embodiment also discloses a first slide rail disposed on any side of a regular hexagon and sliding in conjunction with the first slider, and a second slide rail sliding in conjunction with the second slider.

[0009] Preferably, the embodiments of this application also disclose that the number of aperture lobes is 6, and the included angle between any two aperture lobes is 60°.

[0010] Preferably, embodiments of this application also disclose that a high-temperature resistant layer is formed on the surface of the aperture lobe.

[0011] The technical solutions provided in this application have at least the following significant technical effects or advantages:

[0012] (1) Under the action of the drive motor, the rocker arm is driven to make a fan-shaped motion along the midpoint and end point of the side. When the rotation angle of the first rocker arm is 0°, the rolling end is closed and no rolling is performed with a diameter of 0. When the rotation angle of the first rocker arm is 30°, the rolling end is open and the diameter is at its maximum value. Drive the first rocker arm to rotate its rotation angle within the range of 0-30°. According to the requirements of the inner diameter of the rolled special-shaped pipe, change the inner diameter of the rolling end so that the inner diameter of the rolling end can be uniformly expanded or reduced online, reducing manpower input and improving work efficiency.

[0013] (2) The aperture petals are detachably connected to the inner layer of the roll. The shape of other special-shaped tubes can be rolled by changing the number and shape of the aperture petals. The more aperture petals there are, the more accurate the rolling will be. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the structure of the inner layer of the roll in the embodiment of this application.

[0015] Figure 2 This is a partial enlarged view of the first slider in an embodiment of this application.

[0016] The attached figures are labeled as follows: 1. Outer layer of the roll, 2. Inner layer of the roll, 21. First slider, 22. Second slider, 23. First rocker arm, 24. Second rocker arm, 25. Aperture lobes, 26. Rolling edge. Detailed Implementation

[0017] This application provides a diameter changing device for irregularly shaped pipes, which solves the technical problem that requires stopping the operation and replacing the rollers of different specifications offline when rolling irregularly shaped pipes of different specifications or sizes.

[0018] The technical solution in this application aims to solve the above problems in the following general way:

[0019] like Figures 1-2 As shown, the heated and softened shaped tube blank is pushed into the rolls by the pusher. Under the action of the drive motor, the rocker arm is driven, which drives the slider to make a fan-shaped movement along the midpoint and end point of the edge. When the rotation angle of the first rocker arm 23 is 0°, the rolling slit 26 is closed and no rolling is performed, and the diameter is zero. When the rotation angle of the first rocker arm 23 is 30°, the rolling slit 26 is opened and the diameter is at its maximum value. The first rocker arm 23 is driven to rotate within the range of 0-30°. According to the requirements of the inner diameter of the rolled shaped tube, the inner diameter of the rolling slit 26 is changed so that the inner diameter of the rolling slit 26 can be uniformly expanded or reduced online, thus completing the rolling process.

[0020] This application provides a diameter-changing device for a shaped pipe, including a shaped pipe, a receiving trough for heating and softening the shaped pipe, a pusher, and a rolling mill. The pusher is located on one side of the receiving trough, and the pusher's push port is directly opposite the rolling opening 26 of the rolling mill. The rolling mill includes a cylindrical outer layer 1 and a regular hexagonal inner layer 2. The inner layer 2 includes a first slider 21, a second slider 22, a first rocker arm 23, a second rocker arm 24, and aperture lobes 25 arranged in an array at the axial center. The first slider 21 and the second slider 22 are slidably disposed at the midpoint of any side of the regular hexagon. The included angle between the first slider 21 and the second slider 22 is 120°, and they move in a fan shape along the midpoint and endpoint directions of their respective sides. The first slider 21 and the second slider 22 move in opposite directions. The device also includes a first slide rail disposed on any side of the regular hexagon and sliding in conjunction with the first slider 21, and a second slide rail sliding in conjunction with the second slider 22.

[0021] One end of the first rocker arm 23 is fixedly connected to the first slider 21, and the other end of the first rocker arm 23 is connected to the drive motor. The rotation angle of the first rocker arm 23 is 0-30°. One end of the second rocker arm 24 is fixedly connected to the second slider 22, and the other end of the second rocker arm 24 is movably connected to the first rocker arm 23. There are 6 aperture lobes 25, and the included angle between any two aperture lobes 25 is 60°. A high-temperature resistant layer is formed on the surface of the aperture lobes 25. The aperture lobes 25 are detachably connected to the inner layer 2 of the roll.

[0022] Work process:

[0023] The shaped tube is placed in the receiving trough and heated to soften. The softened shaped tube is pushed into the rolling slit 26 of the rolling mill by the pusher. Under the action of the drive motor, the rocker arm is driven, which drives the slider to make a fan-shaped movement along the midpoint and end point of the edge. When the rotation angle of the first rocker arm 23 is 0°, the rolling slit 26 is closed and no rolling is performed, and the diameter is zero. When the rotation angle of the first rocker arm 23 is 30°, the rolling slit 26 is opened and the diameter is at its maximum value. The first rocker arm 23 is driven to rotate within the range of 0-30°. According to the requirements of the inner diameter of the rolled shaped tube, the inner diameter of the rolling slit 26 is changed so that the inner diameter of the rolling slit 26 can be uniformly expanded or reduced online, thus completing the variable diameter rolling of the shaped tube.

[0024] Although preferred embodiments of the invention have been described, those skilled in the art, once they learn the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0025] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from the spirit and scope of this invention. Therefore, if these modifications and variations of this invention fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A reducing device for irregularly shaped pipes, wherein, include: Special-shaped pipes; A receiving trough used for heating and softening irregularly shaped pipes; A steel pusher, located on one side of the receiving trough; The roll has its pusher opening facing the roll opening (26). The roll includes a cylindrical outer roll layer (1) and a regular hexagonal inner roll layer (2). The inner roll layer (2) includes: First slider (21); The second slider (22) is slidably disposed at the midpoint of any side of a regular hexagon. The angle between the first slider (21) and the second slider (22) is 120°, and they move in a fan shape along the midpoint and endpoint of the side. The first slider (21) and the second slider (22) move in opposite directions. The first rocker arm (23) has one end fixedly connected to the first slider (21), and the other end connected to the drive motor. The rotation angle of the first rocker arm (23) is 0-30°. A second rocker arm (24), one end of which is fixedly connected to the second slider (22), and the other end of which is movably connected to the first rocker arm (23); and Aperture lobes (25) are arranged in an array at the axial position. The aperture lobes (25) are detachably connected to the inner layer (2) of the roll. Adjacent aperture lobes (25) slide in contact with each other. It also includes a first slide rail set on any side of a regular hexagon and sliding in conjunction with the first slider (21), and a second slide rail sliding in conjunction with the second slider (22); The aperture lobes (25) are 6 in number, and the angle between any two aperture lobes (25) is 60°.

2. The diameter reducing device for irregularly shaped pipes according to claim 1, wherein, A high-temperature resistant layer is formed on the surface of the aperture lobe (25).

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