KR200255240Y1 - Apparatus for reforming a pipe - Google Patents

Abstract

The present invention relates to a pipe straightener which is connected to a pipe or installed alone to correct the roundness and straightness of the pipe, the hollow rotating body 23 rotatably installed tubular shaft portion 23 'in the strut 22 of the frame. (C) a calibration means comprising a plurality of pairs of calibration rollers having a long surface inside, and having adjustment means for adjusting a gap between opposed calibration rollers and adjusting a stagger angle with respect to each other. The means consists of first and second pairs of straightening rollers 26, 27 and 28 and 29, and friction heat is generated when the first pair of straightening rollers 26 and 27 are rotated in contact with the outer peripheral surface of the pipe. At least one straightening roller 27 has a cylindrical shape with a constant diameter so as to press-contact the outer circumferential surface of the pipe to be drawn in, while the opposite straightening roller 27 has a structure in which the surface has a curved shape in the shape of a long sphere. As a result, the roundness of the pipe is more precisely corrected and thermal stress is removed by the frictional heat generated at that time, and the surface heat treatment effect of the pipe is obtained. There is an advantage that the number of calibration roller pairs can be reduced without the need for use, thereby reducing the equipment manufacturing cost.

Description

Pipe Straighteners {APPARATUS FOR REFORMING A PIPE}

The present invention relates to a pipe straightener, in particular, is adopted in the rear of the pipe manifold for forming a stainless steel pipe to correct the straightness of the pipe to be deformed when forming a long pipe or used in building construction site scaffolding pipe or vinyl house It relates to a pipe straightener for calibrating so that the reuse pipes and the like can be reused.

An example of such a pipe straightener is disclosed in Korean Patent Application No. 1995-10502 (1995.04.29), and the pipe straightener of the above application is employed in the tube 1 as shown in FIG. The tuber 1 is a hot coil, for example, stainless steel plate (2) is rounded in the form of a pipe, then welded with a welder (6) to form a pipe, remove the weld bead, and then cut to a constant length in the cutter (3) Finally, the pipe surface is smoothly processed in the grinder 4 to form a pipe. During the pipe straightener 5, the pipe is locally deformed and bent as it is heated while being subjected to the pipe joint and welding process. It is provided between the cutter 3 and the polishing machine 4.

The pipe straightener 5 for the pipe manifold has three pairs of rollers in which the same rollers 7 and 7 'having a concave curved surface in the middle are arranged alternately as shown in FIG. 2. Vertical pillars 10 are spaced apart from each other and disposed inside the hollow rotating frame 8, and protruding at both ends of the rotating frame 8 and communicating with the interior of the rotating frame 9. It is rotatably supported by a pulley 11 is provided on one side of the shaft portion 9 is configured to rotate the rotating frame by a drive means not shown in the figure.

Correction of pipe bending and crushing in such a straightener (5) is such that the curved surfaces of the three pairs of rollers in which the pipe to be corrected through the shaft (9) are staggered in two mutually arranged rotations of the rotating frame This is done by wrapping and rotating the outer circumferential surface of the pipe disposed between the surfaces.

However, the straightener 5 as described above has a high accuracy rate as the rollers of the curved surface are rotated while rubbing the pipe outer circumferential surface without being in close contact with the pipe outer circumferential surface, so that the accuracy of the straight and the roundness of the pipe being corrected is low. In the case of a pipe made of a soft material such as a pipe, there is a problem of roughening the pipe surface.

In addition, the guide rollers are arranged at the front and rear sides of the calibrator, but when the long and curved pipe is rotated by the rollers rotating together with the calibrator, the far end of the pipe is rotated to a larger radius of rotation so that the pipe is damaged or surrounded. There was a problem that jeopardized the safety of workers.

In order to improve the straightness of the pipe in the pipe straightness straightener of the prior art, in Korea Utility Model Registration No. 0187051, as shown in FIG. 12) has been proposed to install additionally.

However, the use of the secondary straightener 12 in order to compensate for the straightness of the pipe by the straightener 5 of the tuber as disclosed in Korean Patent Application No. 1995-10502 (1995.04.29), the overall tuber equipment becomes complicated and wide. There is a problem that the area is required and causes an increase in the cost of the tube.

Nevertheless, the conventional pipe straightener as described above is limited to being installed and used in a pipe manifold for forming a pipe. For example, there is a disadvantage in that a straight pipe can not be used to reuse a curved pipe used in a plastic house.

The object of the present invention is to heat the straightening rollers in close contact with the outer circumferential surface of the pipe to be corrected in order to solve the problems of the conventional pipe straighteners described above. It is to provide a pipe straightener with an improved structure to remove stress, to perform surface heat treatment of the pipe, and to correct the roundness and straightness of the pipe with high precision.

Another object of the present invention is not only to be used to correct the bending state of the pipe to be formed by installing the rear side of the welder in the tube, but also the roundness and straightness of the pipe to recycle the bent pipe used for scaffolding of the plastic house or construction site It is to provide a pipe straightener that may be used alone for the purpose of the calibration.

1 is a configuration diagram showing a schematic configuration of a conventional pipe manifold.

Figure 2 is a side view showing a schematic configuration of a conventional pipe straightener employed in FIG.

Figure 3 is a schematic view showing a schematic configuration of another conventional tube machine.

4 is a schematic side view of a pipe straightener according to the present invention;

Figure 5 is a schematic side cross-sectional view showing a bracket fixing structure for the straightening roller of the pipe straightener of Figure 4;

Explanation of symbols on the main parts of the drawings

20: straightener 23: rotating body

26,27,28,29: straightening roller 30: bracket

32: hollow member 33: shaft portion

34: handle 35: worm gear

36: worm 40: guide roller

41: guide part

In order to achieve the above object, the pipe straightener according to the present invention includes first and second pair of straightening rollers mounted opposite to the inside of the hollow rotating body rotatably installed in the frame, and on the pipe inlet side of the rotating body. A guide portion disposed adjacently and having a plurality of pairs of guide rollers to hold the pipe while the straightening rollers are in close contact with the outer circumference of the pipe, wherein the lower straightening roller in the at least first straightening roller pair of the straightening roller pairs The straightening roller on the upper side of the flat surface is of a long, curved structure, and is configured to be in close contact with the first straightening rollers to generate frictional heat on the outer circumferential surface of the pipe when the rotor is rotated. .

The pipe straightener according to the present invention includes an adjusting means for moving the respective straightening roller support brackets in the vertical direction to adjust the distance between the straightening rollers facing each other to straighten pipes of various diameters in the pair of straightening rollers. The worm gear is provided at the upper end of the bracket to rotate the bracket in the horizontal direction so that the upper and lower correction rollers adjust the mutually staggered angle, and the worm is provided in engagement with the worm gear to displace the horizontal angle of the correction roller by rotating the worm gear. And fix them at an adjusted horizontal angle position.

Hereinafter, with reference to the accompanying drawings to describe the present invention in more detail.

The pipe straightener 20 of the present invention, which is schematically shown in cross section in FIG. 3, has a hexahedron shape in which hollow shafts 23 ′ are rotatably mounted by bearings at both struts 22 fixed to the frame 21. First and second pairs of straightening rollers 26 and 27 mounted on the hollow rotating body 23 and the inner space of the rotating body opposite to each other on the upper surface 24 and the bottom surface 25 of the rotating body. (28,29).

The calibration rollers 26, 27, 28 and 29 are rotatably mounted to the shaft 31 in the bracket 30 of the '??' shape, respectively, as shown in more detail in FIG. A hollow member 32 having a screw formed on the inner surface of the bracket 30 may be formed, and may be adjusted by a handle 34 having a shaft portion 33 screwed with the screw portion of the inner surface thereof. As a result, when the handle is rotated in the direction of screwing, the bracket moves closer to the inside of the rotating body, and thus the opposite calibration rollers are spaced apart from each other. When the handle is rotated in the direction of loosening the screw, the hollow member is released from the shaft. The opposing calibration rollers are adjusted closer.

In addition, the shaft portion 33 adjacent to the handle is formed with an annular groove on the outer circumferential surface, and the upper portion of the tubular member 43 fixed to the rotating body is coupled to the groove to support the shaft portion 33 and the handle 34.

In addition, a worm gear 35 is coupled to the outer circumferential surface of the hollow member 32 provided on the upper bracket of each of the straightening rollers, and the worm gear meshes with the worm 36 to rotate the worm as shown in cross section in the drawing. As a result, the bracket is rotated together with the tubular member, and thus the mutually opposite angles of the opposite calibration rollers can be changed. In this way, after adjusting the angle of the calibration roller, it is fastened to the groove 38 formed in the worm gear by the bolt 37 to fix the position. .

It is also possible to optionally adjust the spacing between the first and second pair of opposed calibration rollers so that the roundness and straightness can be precisely adjusted according to the diameter of the pipe to be corrected.

Particularly, according to the present invention, the upper calibration roller 26 of at least the first pair of calibration rollers 26 and 27 has an outer circumferential surface curved concave in an oblong shape, as shown in the drawing, while the lower calibration roller 27 ) Is a cylindrical shape and the outer circumferential surface is uniformly formed so that the straightening rollers 26 and 27 apply pressure to the outer circumferential surface of the pipe to be drawn therein. On the other hand, the second pair of straightening rollers 28, 29 are both formed in the outer circumferentially concave shape.

As the rotating roller rotates, the surfaces of the first pair of straightening rollers 26 and 27 are pressed against the outer circumferential surface of the pipe into which the straightening rollers rotate so that the straightening rollers rotate the outer circumferential surface of the pipe. In particular, the roundness is more accurately corrected and is pushed to the second pair of calibration rollers 28 and 29, and the second pair of the calibration rollers 28 and 29 are used as the first pair of calibration rollers 26 and 27. Together with them, the straightness of the pipe is calibrated to be transported out.

In the calibrator of the present invention, it is preferable to install the guide part 41 made up of three pairs of guide rollers 40 (although only two pairs are shown in the drawing), which is formed in a tube tube, welded to a predetermined length, and the like. Not only are the pipes straightened by preliminary correction of severe bending, but also the straightening rollers 26, 27, 28, 29 are in close contact with the outer circumferential surface of the pipe so that the pipe to be calibrated is rotated outside the calibrator inlet side. Rotation of the pipe parts serves to prevent injuries to surrounding workers or damage to other devices.

The process of performing the roundness and straightness correction of the pipe by the calibrator of the present invention and its operation will be described.

In the calibrator, the handle 34 is rotated by turning the handle 34 according to the material and diameter of the pipe drawn into the rotor 23 through the tubular shaft 23 'of the guide 41 and the rotor 23. In addition, the bolt 37 is removed from the groove 38 of the worm gear and the worm 36 is rotated to adjust the offset angle of the straightening roller, and then the bolt 37 is inserted into the groove 38 to be fixed. Fixed position of the rollers, so that vibration and positional movement of the calibration rollers do not occur at all when driving the rotating body and moving the pipe, so that the conventional pipe roundness and straightness correction is poor due to the change of the distance and angle between the opposite calibration rollers according to the use of the pipe straightener. Occurrence is prevented.

At this time, the first pair of straightening rollers 26 and 27 are brought into close contact with the outer circumferential surface of the pipe, and the frictional heat is rotated as the surface of the straightening rollers 26 and 27 is in close contact with the outer circumferential surface of the pipe by rotation of the rotating body. Is generated so that the thermal stress caused by welding during pipe forming is removed, and the effect of heat-treating the pipe surface is obtained.

In addition, it is easy to damage the pipe surface as the surfaces of the straightening rollers are in close contact with the outer circumferential surface of the pipes. In particular, it is preferable to manufacture the straightening rollers with SKD 11 to prevent damage to the surface of the pipes made of soft material such as copper. Do.

The calibrator of the present invention can not only be used in the rear side of the cutter for straightness and roundness correction of the pipe formed in the pipe tube of FIG. 1, but also recycles the bent pipe used in the plastic house or the scaffolding pipe used in the construction site. It may be used alone to correct roundness and straightness.

According to the present invention, the first pair of straightening rollers 26 and 27 and the upper and lower sides of the lower straightening roller 27 having a uniform cylindrical shape and the upper side straightening rollers 26 having a concave outer circumferential surface are formed in a concave shape. Including the long-term correction rollers (28,29), and the configuration that can precisely adjust the gap and the stagger angle of the opposing calibration rollers, it is possible to precisely correct the roundness and straightness of the pipe, As the surfaces of a pair of straightening rollers press and rotate the outer circumferential surface of the pipe, the roundness of the pipe is more precisely corrected and thermal stress is removed by the frictional heat generated, and the surface heat treatment effect of the pipe is obtained. In the conventional straightener, the problem that the welded portion of the pipe is broken during roundness and straightness correction is eliminated, so that the defective rate is greatly reduced.

In addition, the calibrator of the present invention does not require the use of a secondary calibrator to compensate for the straightness correction as in the conventional calibrator has the advantage that the number of pairs of calibration rollers can be reduced to reduce the equipment manufacturing cost.

In addition, the calibrator of the present invention can be installed and used in the pipe scavenger, and can be used to recycle the curved pipe for the plastic house or the scaffolding pipe used in the construction site by itself, thereby preventing the recycling of waste materials and environmental pollution. There is also an advantage that can contribute.

Claims (3)

In the support pillar 22 of the frame, inside the hollow rotor 23 in which the tubular shaft portion 23 'is rotatably installed, a calibration means comprising a plurality of pairs of calibration rollers having an elongated surface is provided. A pipe straightener for adjusting straightness and roundness as a pipe passes between straightening rollers by adjusting means for adjusting the spacing of straightening rollers and staggering angles with respect to each other. The outer circumferential surface of the pipe, which is composed of two pairs of straightening rollers 26, 27, 28, 29, and in which friction heat is generated when the first pair of straightening rollers 26, 27 are rotated in contact with the pipe outer circumferential surface. At least one straightening roller (27) is a cylindrical shape of constant diameter so as to press tightly, the opposite straightening roller (27) is a pipe straightener, characterized in that the surface has a curved structure in the shape of an oblong. 3. The pair of guide rollers (40) according to claim 1, wherein the pipe to be calibrated in the straightener is held in front of the rotating body (23) so as to hold the pipe when it is inserted into the rotating body (23) and engaged by the straightening rollers. Pipe straightener, characterized in that provided with a guide portion 41 including. 3. The straightening roller support bracket (30) according to claim 1 or 2, wherein the straightener is adapted to adjust the distance between the opposite straightening rollers (26, 27) (28, 29) in response to a change in pipe diameter. ) Up and down adjustment means consisting of a handle 34 screwed to the hollow member 32 on the upper side of the bracket to move the up and down directions, and up and down calibration rollers 26, 27 (28, 29). To fix the worm gear 35 to rotate the bracket 30 in the horizontal direction to adjust the stagger angle with respect to each other and the worm 36 and the worm gear which are provided outside the shaft portion of the bracket to drive the worm gear in the adjusted positions. And a horizontal angle adjusting means consisting of a bolt (37) fastened to the tubular member (43) provided on the rotating body through the groove (38) formed in the worm gear.