A stainless steel pipeline straightening device

Abstract

The present invention discloses a straightening device for a stainless steel pipeline, comprising a base, on which at least two outer straightening mechanisms are arranged along the axial direction of the stainless steel pipe; each outer straightening mechanism comprises a plurality of outer pressure rollers arranged around an axis, and the base is also connected with at least two inner straightening mechanisms via a connecting shaft; the arrangement direction of each inner straightening mechanism is the same as that of the outer straightening mechanism, the inner straightening mechanism corresponds to the outer straightening mechanism one by one, and the inner straightening mechanism is located inside the outer straightening mechanism. The straightening device for a stainless steel pipeline provided by the present invention can act on the inner and outer sides of the stainless steel pipe at the same time, and the straightness and roundness of the stainless steel pipe after straightening are both high, thereby improving product quality.

Description

Technical Field

[0001] The invention relates to the field of stainless steel pipe production, and in particular to a stainless steel pipeline straightening device. Background Art

[0002] Stainless steel pipes need to be straightened after being bent, welded, and polished. In current stainless steel pipe straightening equipment, the roller assemblies are all located on the outside of the stainless steel pipe. The straightness of the stainless steel pipe can be improved by using multiple sets of external rollers. However, since the external rollers themselves have a small diameter in the middle and a large diameter at both ends, and there is a gap between adjacent external rollers in a set of external roller assemblies, when the stainless steel pipe passes between the external roller assemblies, the stainless steel pipe only contacts the two ends of the external roller surface but not the middle of the external roller surface. The roundness of this part of the stainless steel pipe is poor, and the improvement of the overall straightness of the stainless steel pipe is also greatly limited. Summary of the invention

[0003] The purpose of the present invention is to provide a stainless steel pipeline straightening device, which can act on the inner and outer sides of the stainless steel pipe at the same time. The straightening of the stainless steel pipe has high straightness and circularity, thereby improving product quality.

[0004] To achieve the above-mentioned purpose, the present invention provides a straightening device for a stainless steel pipeline, comprising a base, on which are provided at least two external straightening mechanisms arranged along the axial direction of the stainless steel pipe; each external straightening mechanism comprises a plurality of external pressure rollers arranged around an axis, and the base is also connected to at least two internal straightening mechanisms via a connecting shaft; the arrangement direction of each internal straightening mechanism is the same as that of the external straightening mechanism, the internal straightening mechanism corresponds to the external straightening mechanism one by one, and the internal straightening mechanism is located on the inner side of the external straightening mechanism.

[0005] As a further improvement of the present invention, the internal straightening mechanism includes a first base connected to the connecting shaft in the middle, and a plurality of first sliding seats are slidably connected to the first base around its axis, and the sliding direction of the first sliding seat is the radial direction of the first sliding seat; an internal pressure roller is rotatably connected to each first sliding seat; and a driving structure of the first sliding seat is provided on the first base.

[0006] As a further improvement of the present invention, the driving structure of the first sliding seat includes a pneumatic cylinder, which is arranged in the first base, and one end of the first sliding seat extends into the pneumatic cylinder; the pneumatic cylinder is connected to an air supply device.

[0007] As a further improvement of the present invention, the air supply device includes an air pump and an air supply pipe connected to each other, and the air supply pipe is connected to the pneumatic cylinder on the first base.

[0008] As a further improvement of the present invention, the inner pressure rollers on the inner straightening mechanisms adjacent to each other are arranged staggered with each other.

[0009] As a further improvement of the present invention, a coupling is connected between adjacent inner straightening mechanisms on the connecting shaft.

[0010] As a further improvement of the present invention, the external straightening mechanism includes a second base connected to the base, and a plurality of external pressure rollers are connected to the second base for rotation around its axial direction, and the external pressure rollers correspond to the internal pressure rollers one by one.

[0011] As a further improvement of the present invention, the external straightening mechanism also includes a third base, a vertical sliding base and a transverse sliding base connected in sequence; a vertical adjustment mechanism is connected between the third base and the vertical sliding base; a transverse adjustment mechanism is connected between the vertical sliding base and the transverse sliding base; and the second base is connected to the transverse sliding base.

[0012] As a further improvement of the present invention, the second base is rotatably connected to the transverse sliding base, and an angle adjustment mechanism of the second base is connected therebetween.

[0013] Beneficial Effects

[0014] Compared with the prior art, the advantages of the stainless steel pipeline straightening device of the present invention are:

[0015] 1. The inner straightening mechanism corresponds to the outer straightening mechanism. When the straightening device straightens the stainless steel pipe, the stainless steel pipe is clamped between the inner straightening mechanism and the outer straightening mechanism. Through the joint action of the inner and outer sides, it is ensured that the pipe wall of the stainless steel pipe is in full contact with the roller surface of the outer pressure roller. The straightness and roundness of the stainless steel pipe after straightening are both high, which improves the product quality.

[0016] 2. The inner pressure roller on the inner straightening mechanism can move along the radial direction of the first base with the first sliding seat, and its movement is controlled by the driving structure of the first sliding seat. When the stainless steel pipe passes through the outer pressure rollers of each outer straightening mechanism, the inner pressure roller does not apply pressure to the inner side of the stainless steel pipe first, which can facilitate the movement of the stainless steel pipe. When the stainless steel pipe is moved into place, the driving structure of the first sliding seat makes each inner pressure roller apply pressure to the inner wall of the stainless steel pipe to ensure that the wall of the stainless steel pipe is in full contact with the roller surface of the outer pressure roller. At this time, the stainless steel pipe can be axially moved to straighten its various parts, and the roundness is good.

[0017] 3. The first sliding seat is driven by air pressure, which not only has high pressure, but also reduces the use of electrical components, making production safer.

[0018] 4. The coupling on the connecting shaft makes the inner straightening mechanism flexible in the axial direction. When it is not needed to work, the inner pressure roller of the inner straightening mechanism can be placed on the outer pressure roller of the outer straightening mechanism to form a support, so as to avoid the connecting shaft from being subjected to too much gravity, resulting in stress concentration and a short service life.

[0019] The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are used to illustrate embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is the front view of the straightening device on the stainless steel pipeline;

[0022] Figure 2 This is an enlarged view of the main view of the internal straightening mechanism;

[0023] Figure 3 It is a side view of the straightening device in use on the stainless steel pipeline;

[0024] Figure 4 It is a side view of the inner straightening mechanism. DETAILED DESCRIPTION

[0025] Embodiments of the present invention will now be described with reference to the accompanying drawings.

[0026] Example

[0027] The specific embodiments of the present invention are as follows Figures 1 to 4 As shown, a straightening device for a stainless steel pipeline includes a base 1, on which are provided at least two external straightening mechanisms 2 arranged axially along the stainless steel pipe 7; each external straightening mechanism 2 includes a plurality of external pressure rollers 22 arranged around an axis, and the base 1 is also connected to at least two internal straightening mechanisms 3 via a connecting shaft 4. The arrangement direction of each internal straightening mechanism 3 is the same as that of the external straightening mechanism 2, and the internal straightening mechanism 3 corresponds to the external straightening mechanism 2 one by one, and the internal straightening mechanism 3 is located on the inner side of the external straightening mechanism 2. The roller surface of the external pressure roller 22 is in the shape of an inwardly concave arc along its axial section. In this embodiment, each external straightening mechanism 2 is provided with four evenly distributed external pressure rollers 22, such as Figure 1 shown.

[0028] The inner straightening mechanism 3 includes a first base 31 connected to the connecting shaft 4 in the middle, and a plurality of first sliding seats 33 are slidably connected to the first base 31 around its axis, and the sliding direction of the first sliding seat 33 is the radial direction of the first sliding seat 33. An inner pressure roller 34 is rotatably connected to each first sliding seat 33. A driving structure of the first sliding seat 33 is provided on the first base 31. The roller surface of the inner pressure roller 34 is in an outwardly convex arc shape along its axial section. In this embodiment, four evenly distributed inner pressure rollers 34 are also provided on each inner straightening mechanism 3.

[0029] The driving structure of the first sliding seat 33 includes a pneumatic cylinder 32, which is disposed in the first base 31, and one end of the first sliding seat 33 extends into the pneumatic cylinder 32. The pneumatic cylinder 32 is connected to an air supply device 6.

[0030] The air supply device 6 includes an air pump 61 and an air supply pipe 62 connected to each other, and the air supply pipe 62 is connected to the air cylinder 32 on the first base 31. The air pump 61 is installed on the base 1, and the air supply pipe 62 can extend to the corresponding air cylinder 32 along the inside or outside of the connecting shaft 4.

[0031] The inner pressure rollers 34 on the front and rear adjacent inner straightening mechanisms 3 are staggered, and the outer pressure rollers 22 on the front and rear adjacent outer straightening mechanisms 2 are staggered. When the stainless steel pipe 7 moves between the outer straightening mechanism 2 and the inner straightening mechanism 3, it can be ensured that all parts of the stainless steel pipe 7 are affected by the outer pressure rollers 22 and the inner pressure rollers 34.

[0032] A coupling 5 is connected between adjacent inner straightening mechanisms 3 on the connecting shaft 4. In this embodiment, a plurality of inner straightening mechanisms 3 are connected in series through the connecting shaft 4 and the coupling 5, one end of which is connected to the base 1 through the connecting shaft 4 and the coupling 5, and the other end is a free end, which is convenient for extending into the stainless steel pipe 7.

[0033] The outer straightening mechanism 2 includes a second base 21 connected to the base 1 , an outer pressing roller 22 is rotatably connected to the second base 21 , and the outer pressing roller 22 corresponds to the inner pressing roller 34 one by one.

[0034] The external straightening mechanism 2 further includes a third base 25, a vertical sliding base 24 and a horizontal sliding base 23 which are connected in sequence. The third base 25 is arranged on the base 1, and a vertical adjustment mechanism 27 is connected between the third base 25 and the vertical sliding base 24. A horizontal adjustment mechanism 26 is connected between the vertical sliding base 24 and the horizontal sliding base 23. The second base 21 is connected to the horizontal sliding base 23.

[0035] In this embodiment, the vertical adjustment mechanism 27 includes a vertically arranged first screw rod, the middle part of the first screw rod is rotationally connected to the third base 25, the lower end of the first screw rod is threadedly connected to the vertical sliding base 24, and the vertical sliding base 24 is slidingly connected to the third base 25 through a vertical guide rail.

[0036] The transverse adjustment mechanism 26 includes a second screw rod arranged horizontally, the middle part of the second screw rod is rotatably connected to the vertical sliding base 24, one end of the second screw rod is threadedly connected to the transverse sliding base 23, and the transverse sliding base 23 is slidably connected to the vertical sliding base 24 through a transverse guide rail. The upper end of the first screw rod and the other end of the second screw rod are both polygonal cylinders, which can be turned by a wrench, and can also be connected to a hand wheel.

[0037] The second base 21 is rotatably connected to the transverse sliding base 23, and an angle adjustment mechanism of the second base 21 is connected therebetween. In this embodiment, the angle adjustment mechanism includes a meshing worm wheel 28 and a worm 29. The worm wheel 28 is fixedly connected to the second base 21 and arranged coaxially, and the worm 29 is rotatably connected to the transverse sliding base 23. One end of the worm 29 is a polygonal cylinder, and a hand wheel can also be connected thereto.

[0038] When the stainless steel tube 7 needs to be straightened, the stainless steel tube 7 is first passed between the outer pressure rollers 22 of each outer straightening mechanism 2. At this time, the inner pressure rollers 34 do not apply pressure to the inner side of the stainless steel tube 7, which can facilitate the movement of the stainless steel tube 7. After the stainless steel tube 7 is moved into place, the inner pressure rollers 34 are pressed against the inner wall of the stainless steel tube 7 through the driving structure of the first sliding seat 33 to ensure that the tube wall of the stainless steel tube 7 is in full contact with the roller surface of the outer pressure roller 22. At this time, the stainless steel tube 7 is moved axially, and its various parts can be straightened, and the roundness is good.

[0039] The present invention is described above in conjunction with the best embodiment, but the present invention is not limited to the above disclosed embodiment, but should cover various modifications and equivalent combinations based on the essence of the present invention.

Claims

1. A straightening device for a stainless steel pipeline, comprising a base (1), wherein the base (1) is provided with at least two external straightening mechanisms (2) arranged along the axial direction of the stainless steel pipe; each external straightening mechanism (2) comprises a plurality of external pressure rollers (22) arranged around an axis, characterized in that: The base (1) is also connected to at least two inner straightening mechanisms (3) via a connecting shaft (4); the arrangement direction of each inner straightening mechanism (3) is the same as the arrangement direction of the outer straightening mechanism (2); the inner straightening mechanism (3) corresponds to the outer straightening mechanism (2) one by one, and the inner straightening mechanism (3) is located inside the outer straightening mechanism (2); the inner straightening mechanism (3) comprises a first base (31) connected to the connecting shaft (4) in the middle, a plurality of first sliding seats (33) are slidably connected to the first base (31) around its axis, and the sliding direction of the first sliding seats (33) is The first sliding seat (33) is radially connected to each other; each first sliding seat (33) is rotatably connected to an inner pressure roller (34); a driving structure of the first sliding seat (33) is provided on the first base (31); the driving structure of the first sliding seat (33) comprises a pneumatic cylinder (32), the pneumatic cylinder (32) is arranged in the first base (31), and one end of the first sliding seat (33) extends into the pneumatic cylinder (32); the pneumatic cylinder (32) is connected to an air supply device (6); and a coupling (5) is connected between adjacent inner straightening mechanisms (3) on the connecting shaft (4).

2. A stainless steel pipeline straightening device according to claim 1, characterized in that: The air supply device (6) comprises an air pump (61) and an air supply pipe (62) which are connected to each other, and the air supply pipe (62) is in communication with the pneumatic cylinder (32) on the first base (31).

3. A stainless steel pipeline straightening device according to claim 1, characterized in that: The inner pressure rollers (34) on the inner straightening mechanisms (3) adjacent to each other are arranged staggered with respect to each other.

4. A stainless steel pipeline straightening device according to claim 1, characterized in that: The external straightening mechanism (2) comprises a second base (21) connected to the base (1), the external pressure roller (22) being rotatably connected to the second base (21), and the external pressure roller (22) corresponding to the internal pressure roller (34) in a one-to-one manner.

5. A stainless steel pipeline straightening device according to claim 4, characterized in that: The external straightening mechanism (2) further comprises a third base (25), a vertical sliding base (24) and a transverse sliding base (23) which are connected in sequence; a vertical adjustment mechanism (27) is connected between the third base (25) and the vertical sliding base (24); a transverse adjustment mechanism (26) is connected between the vertical sliding base (24) and the transverse sliding base (23); and the second base (21) is connected to the transverse sliding base (23).

6. A stainless steel pipeline straightening device according to claim 5, characterized in that: The second base (21) is rotatably connected to the transverse sliding base (23), and an angle adjustment mechanism of the second base (21) is connected between the two.

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