Large diameter steel pipe mouth laser equalization instrument and equalization method

Abstract

The present invention relates to the field of pipeline construction technology, and in particular to a large-diameter steel pipe orifice laser divider and a dividing method. The large-diameter steel pipe orifice laser divider comprises a laser lamp, an angle fixing disk, and an angle rotating disk. The angle fixing disk is coaxially arranged with the steel pipe and provided with angle scale lines; the angle rotating disk is rotatably connected to the angle fixing disk and arranged coaxially with the angle fixing disk and provided with angle scale lines; the laser lamp is disposed on the angle rotating disk, and the laser lamp's light beam is within a plane perpendicular to the angle rotating disk and passing through the center of the angle rotating disk. This solves the technical problem of large errors in existing dividing methods.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline construction, in particular to a large-diameter steel pipe orifice laser dividing instrument and a dividing method. Background Art

[0002] In existing technology, when connecting large-diameter steel pipes in long-distance oil and gas pipelines, especially during hot work connections during pipeline maintenance and repairs, or when connecting pipes in special locations, the opposing ends of the two pipe sections may be misaligned. This requires dividing the pipe ends into equal sections, measuring the bevel deviation of each section, and then cutting the connecting pipe stubs based on the bevel deviation. Dividing the pipe ends requires at least two people to use a steel tape measure to circle the outer diameter of the pipe end, measure the outer circumference, divide the pipe ends into equal sections based on the circumference, and then extend the dividing points to the blunt edge of the inner end of the pipe end. This division method introduces significant errors due to the measurement and marking methods, which in turn affects the accuracy of the calculated dimensions of the connecting pipe stubs. Summary of the Invention

[0003] The purpose of the present invention is to provide a large-diameter steel pipe mouth laser dividing instrument and dividing method, so as to solve the technical problem of large pipe mouth dividing errors caused by measurement and marking in the prior art.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is:

[0005] A large-diameter steel pipe mouth laser divider includes a laser lamp, an angle fixing disk and an angle rotating disk;

[0006] The angle fixing plate is coaxially arranged with the steel pipe, and angle scale lines are provided on the angle fixing plate;

[0007] The angle rotating disk is rotatably connected to the angle fixed disk and is coaxially arranged with the angle fixed disk. The angle rotating disk is provided with angle scale lines.

[0008] The laser light is arranged on the angle rotating disk, and the light beam of the laser light is in a plane which is perpendicular to the angle rotating disk and passes through the center of the circle of the angle rotating disk.

[0009] Furthermore, the large-diameter steel pipe mouth laser divider also includes a supporting mechanism, which includes a slider and a ruler. The slider is slidably connected to the ruler, and the slider is connected to the angle fixing plate. The ruler is vertically arranged and contacts the bottom of the inner wall of the steel pipe when in use.

[0010] Furthermore, the axis of the angle fixing plate is within the upper end plane of the slider and is flush with the upper end of the slider.

[0011] Furthermore, the support mechanism further includes a base; the ruler vertically passes through the base and is slidably connected to the base in the vertical direction, and in the use state, the bottom end of the ruler contacts the inner wall of the steel pipe;

[0012] The axis of the angle fixing plate is within a perpendicular bisector plane of the base that is parallel to the axis of the steel pipe.

[0013] Furthermore, the supporting mechanism also includes a guide sleeve, which is vertically arranged on the base. The guide sleeve is provided with an inner hole, and the scale is slidably inserted into the inner hole.

[0014] Furthermore, the supporting mechanism also includes a horizontal level and a vertical level, which are arranged on the upper surface of the base and are perpendicular to each other.

[0015] Furthermore, the large-diameter steel pipe mouth laser divider also includes a vertical laser ruler, which contacts the bottom of the inner wall of the steel pipe, and the light beam of the vertical laser ruler is vertically irradiated to the top of the inner wall of the steel pipe.

[0016] Furthermore, a notch is provided on the base, the notch being symmetrical with respect to a perpendicular bisector of the base parallel to the axis of the steel pipe, and the vertical laser ruler is inserted into the notch and is slidably connected to the base.

[0017] Furthermore, the diameter of the angle rotating disk is smaller than the diameter of the angle fixing disk, and a pointer is provided on the outer circle of the angle rotating disk, and the pointer points to the scale line on the angle fixing disk.

[0018] A method for dividing a large-diameter steel pipe by using the above-mentioned laser dividing instrument for dividing the pipe opening is characterized by comprising the following steps:

[0019] Leveling the base: Adjust the horizontal and vertical levels so that the bubbles on each level are located in the middle of the scale lines;

[0020] Measure the diameter of the inner wall of the steel pipe: Turn on the vertical laser ruler and measure the diameter d and radius r of the inner wall of the steel pipe, where d = 2r;

[0021] Adjust the height of the angle fixing plate: adjust the position of the slider so that the scale size of the ruler aligned with the upper end plane of the slider is consistent with the radius r. At this time, the axis of the angle fixing plate coincides with the axis of the steel pipe.

[0022] Calibrate the initial point: turn on the laser light, adjust the scale on the angle rotating disk, align the 360° scale line on the angle rotating disk with the 360° scale line on the angle fixed disk, and the position where the laser light beam hits the inner wall of the steel pipe mouth is the initial point;

[0023] Mark the equal division points: Calculate the rotation angle of the angle rotating disk 360° / n each time according to the number n to be divided equally, and rotate the angle rotating disk according to the calculated angle 360° / n. After each rotation, the laser light beam is irradiated to the inner wall of the steel pipe mouth as the equal division line.

[0024] Based on the above technical solutions, the technical effects achieved by the present invention are:

[0025] The present invention provides a large-diameter steel pipe orifice laser divider, comprising: an angle fixing disk, an angle rotating disk and a laser lamp; the angle fixing disk is coaxially arranged with the steel pipe, and the angle fixing disk is provided with an angle scale; the angle rotating disk is rotatably connected to the angle fixing disk and coaxially arranged with the angle fixing disk, and the angle rotating disk is provided with angle scale lines; the laser lamp is arranged on the angle rotating disk, and the light beam of the laser lamp is in a plane perpendicular to the angle rotating disk and passing through the center of the angle rotating disk.

[0026] The rotating angle rotating disk drives the laser light to rotate, so that the position of the laser light beam irradiated on the inner wall of the steel pipe changes. The rotation angle of the laser light is calculated according to the number of equal parts that the pipe mouth needs to be divided into. The angle rotating disk is rotated according to the calculated angle and the rotation is confirmed to be in place by the scale on the angle fixing disk. The light beam of the laser light irradiated on the inner wall of the steel pipe is the equal division line. Use a marker to directly mark the equal division line on the inner wall of the steel pipe to complete the equal division, avoiding the errors caused by measuring with a tape measure and extending the drawing line, and improving the accuracy of the equal division. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A front view of the large-diameter steel pipe orifice laser divider provided by the present invention;

[0029] Figure 2 A top view of the large-diameter steel pipe orifice laser divider provided by the present invention;

[0030] Figure 3 An enlarged view of the angle fixed disk 200 and the angle rotating disk 300 of the large-diameter steel pipe orifice laser bisecting instrument provided by the present invention;

[0031] Figure 4 A schematic diagram of the quartering lines of the large-diameter steel pipe orifice laser bisecting instrument provided by the present invention;

[0032] Figure 5 A schematic diagram of the octaves of the large-diameter steel pipe orifice laser bisection instrument provided by the present invention;

[0033] Figure 6 This is a schematic diagram of the first step of the sixteen-equal-line method of the laser bisecting instrument for the mouth of a large-diameter steel pipe provided by the present invention;

[0034] Figure 7This is a schematic diagram of the second step of the sixteen-equal-line method of the large-diameter steel pipe mouth laser bisection instrument provided by the present invention;

[0035] Figure 8 The following are the detailed steps for the equal division method using the above-mentioned large-diameter steel pipe mouth laser equalizer.

[0036] Icons: 100-Laser light; 200-Angle fixed disk; 300-Angle rotating disk; 400-Support mechanism; 500-Vertical laser ruler; 600-Laser light holder; 700-Angle rotation button; 800-Angle rotation nut; 900-Fixed shaft; 1000-Battery; 1100-Switch; 1200-Switch bracket; 1300-Steel pipe;

[0037] 410-slider; 420-ruler; 430-base; 440-guide sleeve; 450-horizontal level; 460-vertical level; 470-fastening knob; 480-fastening nut; DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0041] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like indicate positions or locations based on the positions shown in the accompanying drawings, or the positions or locations in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0043] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0044] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0045] Conventional technology for connecting large-diameter steel pipes for long-distance oil and gas pipelines requires dividing the pipe ends into equal sections, measuring the bevel deviation of each section, and then cutting the connecting pipe stubs based on the bevel deviation. This process requires at least two people to use a steel tape measure to circle the outer diameter of the pipe end, measure the circumference, divide the pipe into equal sections based on the circumference, and then extend the dividing points to the blunt edge of the inner end of the pipe end. This method of dividing the pipe ends into equal sections can introduce significant errors due to the measurement and marking methods, which in turn affects the accuracy of the calculated dimensions of the connecting pipe stubs.

[0046] In view of this, the present invention provides a large-diameter steel pipe mouth laser equalizer and equalization method, the large-diameter steel pipe mouth laser equalizer includes an angle fixing disk 200, an angle rotating disk 300 and a laser lamp 100; the angle fixing disk 200 is coaxially arranged with the steel pipe 1300, and the angle fixing disk 200 is provided with an angle scale; the angle rotating disk 300 is rotatably connected to the angle fixing disk 200 and is coaxially arranged with the angle fixing disk 200, and the angle rotating disk 300 is provided with an angle scale line; the laser lamp 100 is arranged on the angle rotating disk 300, and the light beam of the laser lamp 100 is in a plane perpendicular to the angle rotating disk 300 and passing through the center of the angle rotating disk 300.

[0047] The rotation angle rotating disk 300 then drives the laser lamp 100 to rotate, so that the position where the laser lamp 100 beam is irradiated on the inner wall of the steel pipe changes. The rotation angle of the laser lamp 100 is calculated according to the number of equal parts that the steel pipe mouth needs to be divided into. The angle rotating disk 300 is rotated according to the calculated angle and the rotation is confirmed to be in place through the scale on the angle fixing disk 200. The light beam of the laser lamp 100 irradiated on the inner wall of the steel pipe is the equal division line. Use a marker to directly mark the equal division line on the inner wall of the steel pipe to complete the equal division, avoiding the errors caused by tape measure measurement and extended line drawing, and improving the accuracy of equal division.

[0048] In this embodiment, Figure 1 、 2 As shown in Figures 3 and 3 , both the angle rotating disk 300 and the angle fixed disk 200 are provided with circular disks with 360° scales, and the diameter of the angle rotating disk 300 is smaller than that of the angle fixed disk 200 .

[0049] Optionally, only one scale line is provided on the angle rotating disk 300. Further, a pointer is provided on the outer circle of the angle rotating disk 300, and the pointer points to the scale on the angle fixed disk 200. Further, the pointer is provided at the 360° scale line of the angle rotating disk 300, and the 0° position coincides with the 360° position.

[0050] Optionally, only one scale line is provided on the angle fixing disk 200, and 360° scale lines are provided on the angle rotating disk 300. Further, a pointer is provided on the angle fixing disk 200, and the pointer points to the scale line on the angle rotating disk 300.

[0051] Optionally, the diameter of the angle rotating disk 300 is larger than the diameter of the angle fixing disk 200 , and a pointer is provided on the angle fixing disk 200 , and the pointer points to a scale line on the angle rotating disk 300 .

[0052] Optionally, the diameter of the angle rotating disk 300 is equal to the diameter of the angle fixing disk 200, and the scale lines on the angle rotating disk 300 are hollowed out. The rotation angle is determined by aligning the hollowed scale lines with the scale lines on the angle fixing disk 200.

[0053] In this embodiment, a laser lamp holder 600 is mounted on the angle rotating disk 300, and a laser lamp 100 is fixed to the laser lamp holder 600. Preferably, there are four laser lamps 100, enabling quick quartering, eighth division, or twelve-division. The four laser lamps 100 are evenly spaced on the angle rotating disk 300, spaced 90° apart. The beams of the laser lamps 100 are aligned with the 360°, 90°, 180°, and 270° scale lines, respectively. The beam color of the laser lamps 100 is preferably red, but other colors are also acceptable. The number of laser lamps 100 can be set to one or more as needed.

[0054] Furthermore, a battery 1000 is provided on the side of the angle fixing disk 200 that is away from the angle rotating disk 300 and has no scale. The battery 1000 provides power for the laser light 100 .

[0055] In order to realize the rotation and locking of the angle rotating disk, the large diameter steel pipe orifice laser divider provided in this embodiment further includes a fixed shaft 900, an angle rotating nut 800 and an angle rotating button 700, which are coaxially arranged. Figure 1 、 2 As shown, the fixed shaft 900 is a stepped shaft coaxially arranged with the angle fixing disk 200. The smaller end of the fixed shaft 900 is externally threaded. The unscaled side of the angle fixing disk 200, facing away from the angle rotating disk 300, is connected to the stepped surface of the fixed shaft 900. The other side is connected to the angle rotating nut 800. The internal threads of the angle rotating nut 800 mate with the external threads of the fixed shaft 900, securing the angle fixing disk 200 between the fixed shaft 900 and the angle rotating nut 800. The angle rotating button 700 is connected to the side of the angle rotating nut 800 facing away from the angle fixing disk 200. The angle rotating disk 300 is mounted on the angle rotating button 700 and is fixedly connected to the angle rotating button 700. Pressing the angle rotating button 700 locks it in place, fixing the position of the angle rotating disk 300. Pressing the angle rotating button 700 again causes it to pop up, allowing it to rotate, thereby rotating the angle rotating disk 300 and changing the position of the laser light 100's beam.

[0056] like Figure 1 、 2 As shown, the large-diameter steel pipe orifice laser divider in this embodiment further includes a supporting mechanism, which includes a slider 410 and a scale 420 .

[0057] The ruler 420 is vertically arranged, perpendicular to the axis of the steel pipe 1300, and the bottom end of the ruler 420 contacts the bottom of the inner wall of the steel pipe. The ruler 420 is engraved with scale lines to indicate the height dimension. The slider 410 is slidably connected to the ruler 420 and moves in the vertical direction along the ruler 420. The slider 410 is fixedly connected to the fixed shaft 900. Preferably, the axis of the fixed shaft 900 is within the upper end plane of the slider 410. At this time, the position where the upper end of the slider 410 is aligned with the scale lines of the ruler 420 is the height dimension of the axis of the angle rotating disk 300 and the angle fixed disk 200. Preferably, the ruler 420 is rectangular in shape, and the slider 410 has a rectangular inner hole with the same size as the ruler 420. The two rectangles cooperate so that the ruler 420 guides and limits the slider 410.

[0058] Optionally, the slider 410 may be provided with two circular holes, with the scale 420 serving as an axis with scale lines disposed thereon. A guide light axis is also provided, with the guide light axis and the scale 420 engaging with the circular holes in the slider 410, respectively. The guide light axis and the scale 420 are parallel and arranged vertically. The guide light axis and the scale 420 cooperate to guide and limit the position of the slider 410.

[0059] Furthermore, slider 410 is provided with a tightening knob 470 and a tightening nut 480. The tightening knob 470 and the tightening nut 480 are coaxially arranged, and the internal thread of the tightening nut 480 mates with the external thread of the tightening knob 470. A threaded hole is formed in slider 410 to mate with the external thread of the tightening knob 470, and the threaded end of the tightening knob 470 presses against the scale 420. This causes the side of the slider 410 with the threaded hole to separate from the scale 420, while the other side of the slider 410 tends to press against the scale 420. This increases the positive pressure between the slider 410 and the scale 420, thereby increasing the friction and fixing the relative position of the slider 410 and the scale 420. One side of the tightening nut 480 presses against the slider 410, providing a pre-tightening force to the threaded hole of the tightening knob 470 and the slider 410, preventing them from loosening due to factors such as vibration.

[0060] The support mechanism of the large-diameter steel pipe orifice laser divider provided in this embodiment also includes a base 430, on which a guide sleeve 440 is provided. The base 430 is set in a horizontal state, and the axis of the angle fixing disk 200 is within the vertical bisector plane of the base 430 that is parallel to the axis of the steel pipe, so as to ensure that the axis of the angle fixing disk 200 is within the vertical plane where the axis of the steel pipe 1300 is located. The guide sleeve 440 has an inner hole that is slidably connected to the ruler 420, and the ruler 420 passes through the guide sleeve 440 and contacts the bottom of the inner wall of the steel pipe. Furthermore, the guide sleeve 440 has a rectangular inner hole that is the same as the rectangular cross-section of the ruler 420. The two rectangles cooperate to guide and limit the ruler 420 to keep it vertical.

[0061] Furthermore, base 430 is equipped with a horizontal level 450 and a vertical level 460. The horizontal level 450 is positioned at the center of the base plate, and the bubble in the level moves perpendicularly to the axis of the angle fixing plate 200. The vertical level 460 is positioned perpendicular to the horizontal level 450, and the bubble moves in the same direction as the axis of the angle fixing plate 200. The coordinated use of the horizontal level 450 and the vertical level 460 ensures that base 430 is horizontal when placed on the inner wall of the steel pipe, thereby ensuring that the scale 420 is vertical, thereby ensuring that the axis of the angle fixing plate 200 is within the vertical plane of and parallel to the axis of the steel pipe 1300.

[0062] The large diameter steel pipe mouth laser divider provided in this embodiment also includes a vertical laser ruler 500, such as Figure 1 、 2 As shown, base 430 has a notch symmetrically spaced about a plane perpendicular to the steel pipe's axis. The notch's width matches the width of the vertical laser encoder 500, which is inserted into the notch and slidably connected to base 430. The vertical laser encoder 500 is positioned vertically, with a circular bottom that contacts the bottom of the steel pipe's inner wall. The beam from the vertical laser encoder 500 shines vertically onto the top of the steel pipe's inner wall, measuring its diameter.

[0063] The large-diameter steel pipe mouth laser divider provided in this embodiment also includes a switch 1100 and a switch bracket 1200. The switch bracket 1200 is fixedly connected to the slider 410, and the switch 1100 is set on the switch bracket 1200. The switch 1100 is connected to the battery 1000 and the laser lamp 100 through a circuit to control the opening and closing of the laser lamp 100. The switch 1100 can be set to one, and all laser lamps 100 are controlled by one switch 1100; the switch 1100 can also be set to multiple, and one or more laser lamps 100 are controlled by one switch 1100 according to the number and arrangement of the laser lamps 100, and the required laser lamps 100 are turned on according to the number of equal divisions to prevent the beams of excess laser lamps 100 from affecting the drawing. For example, as shown in the attached Figure 3 As shown, four laser lamps 100 are installed on the angle rotating disk 300. When the pipe mouth needs to be divided into five equal parts, three of the laser lamps 100 can be turned off and only one laser lamp 100 can be turned on. In this case, four switches 1100 can be used to control each laser lamp 100 separately, or two switches 1100 can be used, with one switch controlling three laser lamps 100 and the other controlling one laser lamp 100.

[0064] The working process of the large-diameter steel pipe mouth laser equalizer provided in this embodiment is as follows:

[0065] Place the bisecting instrument on the inner wall of the steel pipe, allowing its weight to hold it in place. The vertical laser ruler 500, now in contact with the bottom of the steel pipe's inner wall due to gravity, is now adjusted horizontally so that the bubbles on both the horizontal and vertical levels 450 and 460 are centered between the scale lines. This ensures the bisecting instrument is level. The axis of the angle fixing plate 200 is now in the vertical plane of the axis of the steel pipe 1300. Open the vertical laser ruler 500 and place it in the notch of the base 430, so that the bottom of the vertical laser ruler 500 contacts the bottom of the steel pipe's inner wall. The beam shines onto the top of the steel pipe's inner wall, measuring the inner diameter of the steel pipe and calculating the radius, which is the height dimension of the axis of the angle fixing plate 200. Loosen the tightening knob 470 and adjust the position of the slider 410 so that the upper surface of the slider 410 aligns with the corresponding height dimension on the scale 420. The axis of the steel pipe 1300 is now in the upper surface of the slider 410. Then tighten the tightening knob 470 to fix the position of the slider 410. At this time, the axis of the angle fixing plate 200 coincides with the axis of the steel pipe 1300. Figure 3 As shown, align the 360° scale line on the angle rotating disk 300 with the 360° scale line on the angle fixed disk 200. According to the number of equal parts to be divided, determine the equal division angle, that is, the rotation angle of the angle rotating disk 300. The equal division method is as follows:

[0066] When dividing into four equal parts, Figure 3 、 4 As shown, four lasers are evenly spaced 90° apart on the angle rotating disk 300. Rotate the angle rotating disk 300 until the 360° scale lines on the angle fixing disk 200 and the angle rotating disk 300 are aligned. Press the angle rotation button 700 to lock the angle rotating disk 300, and turn on the switch 1100. The light beams emitted by the four laser lights 100 onto the inner wall of the steel pipe now represent the four equal lines of the pipe opening. Mark these four lines with a marker to obtain points 1, 2, 3, and 4. The angle rotating disk 300 can also be rotated to any position to create the four equal lines.

[0067] When dividing into eight equal parts, Figure 3 、 4As shown in Figures 5 and 6, align the 360° scale line on the angle rotating disk 300 with the 360° scale line on the angle fixing disk 200 and first divide the lines into four equal parts using the quartering method, obtaining points 8, 2, 4, and 6. After marking with a marker, press the angle rotation button 700 again to make it pop up. Rotate the angle rotation button 700 to a rotation angle of 45°, driving the angle rotating disk 300 so that the 360° scale line on the angle rotating disk 300 aligns with the 45° scale line on the angle fixing disk 200. Press the angle rotation button 700 to fix the angle rotating disk 300. Mark the positions of the laser light 100 beam on the inner wall of the steel pipe with a marker to obtain points 1, 3, 5, and 7. These eight points complete the eighth division of the steel pipe mouth.

[0068] When dividing into twelve equal parts, Figure 3 、 6 As shown, align the 360° scale line on the angle rotating disk 300 with the 360° scale line on the angle fixed disk 200, and divide the area into four equal parts to obtain points 12, 3, 6, and 9. Press the angle rotation button 700 to pop up the button, and rotate the angle rotation button 700 to drive the angle rotating disk 300 to rotate 30°. Align the 360° scale line on the angle rotating disk 300 with the 30° scale line on the angle fixed disk 200. Press the angle rotation button 700 to fix the angle rotating disk 300. Mark the inner wall of the steel pipe with a marker according to the light emitted by the laser lamp 100 at this time, and obtain four equally divided points 1, 4, 7, and 10. Figure 7 As shown, repeat the above process, press the angle rotation button 700 to make the button pop up, rotate the angle rotation button 700 to drive the angle rotation disk 300 to rotate 30°, so that the 360° scale line on the angle rotation disk 300 is aligned with the 60° scale line on the angle fixing disk 200, press the angle rotation button 700 to fix the angle rotation disk 300, and mark the light irradiated by the laser lamp 100 on the inner wall of the steel pipe with a marker to obtain four equal points 2, 5, 8, and 11, that is, the twelve equal points of the steel pipe mouth are obtained.

[0069] Optionally, three laser lamps 100 are evenly arranged on the angle rotating disk 300 with an interval of 120°. According to the above method, the pipe mouth can be quickly divided into three equal parts, six equal parts, nine equal parts, or twelve equal parts.

[0070] Example 2

[0071] This embodiment provides a method for dividing a large-diameter steel pipe orifice into equal parts using the aforementioned laser dividing instrument. The method comprises the following steps:

[0072] S1. Leveling the base 430: Adjust the horizontal level 450 and the vertical level 460 so that the bubbles in each are located in the middle of the scale lines;

[0073] S2. Measure the diameter of the inner wall of the steel pipe: Turn on the vertical laser ruler 500 and measure the diameter d and radius r of the inner wall of the steel pipe, where d = 2r;

[0074] S3. Adjust the height of the angle fixing plate 200: Adjust the position of the slider 410 so that the scale size of the ruler 420 aligned with the upper surface of the slider 410 is consistent with the radius r. At this time, the axis of the angle fixing plate 200 coincides with the axis of the steel pipe.

[0075] S4. Calibrate the initial point: Turn on the laser light 100 and adjust the scale on the angle rotating disk 300 so that the 360° scale line on the angle rotating disk 300 is aligned with the 360° scale line on the angle fixing disk 200. At this time, the position where the beam of the laser light 100 hits the inner wall of the steel pipe is the initial point.

[0076] S5. Mark the equal division points: Calculate the rotation angle of the angle rotating disk 300 each time 360° / n according to the number n of equal divisions to be made, and rotate the angle rotating disk 300 according to the calculated angle 360° / n. After each rotation, the light beam of the laser lamp 100 is irradiated onto the inner wall of the pipe mouth, and the light is used as the equal division line.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large diameter steel pipe mouth laser divider, characterized in that: It comprises a laser lamp (100), an angle fixing disk (200) and an angle rotating disk (300); The angle fixing disk (200) is coaxially arranged with the steel pipe, and angle scale lines are provided on the angle fixing disk (200); The angle rotating disk (300) is rotationally connected to the angle fixing disk (200) and is coaxially arranged with the angle fixing disk (200), and the angle rotating disk (300) is provided with angle scale lines; The laser lamp (100) is arranged on the angle rotating disk (300), and the light beam of the laser lamp (100) is in a plane perpendicular to the angle rotating disk (300) and passing through the center of the angle rotating disk (300); The device further comprises a support mechanism (400), wherein the support mechanism (400) comprises a slider (410) and a scale (420), wherein the slider (410) is slidably connected to the scale (420), the slider (410) is connected to the angle fixing plate (200), and the scale (420) is vertically arranged and contacts the bottom of the inner wall of the steel pipe in a state of use; The support mechanism (400) further includes a base (430); The scale (420) vertically passes through the base (430) and is slidably connected to the base (430) in the vertical direction. In a state of use, the bottom end of the scale (420) contacts the inner wall of the steel pipe; The axis of the angle fixing plate (200) is within a perpendicular bisector plane parallel to the axis of the base (430) and the steel pipe; The support mechanism (400) further includes a horizontal level (450) and a vertical level (460), wherein the horizontal level (450) and the vertical level (460) are arranged on the upper surface of the base (430) and are perpendicular to each other; The diameter of the angle rotating disk (300) is smaller than the diameter of the angle fixing disk (200), and a pointer is provided on the outer circle of the angle rotating disk (300), and the pointer points to a scale line on the angle fixing disk (200).

2. The large-diameter steel pipe mouth laser divider according to claim 1, characterized in that: The axis of the angle fixing disk (200) is within the upper end plane of the slider (410) and is flush with the upper end of the slider (410).

3. The large diameter steel pipe mouth laser divider according to claim 2, characterized in that: The support mechanism (400) further comprises a guide sleeve (440), wherein the guide sleeve (440) is vertically arranged on the base (430), and the guide sleeve (440) is provided with an inner hole, and the scale (420) is slidably inserted into the inner hole.

4. The large diameter steel pipe orifice laser divider according to claim 3, characterized in that: It also includes a vertical laser ruler (500), which contacts the bottom of the inner wall of the steel pipe, and the light beam of the vertical laser ruler (500) is vertically irradiated to the top of the inner wall of the steel pipe.

5. The large diameter steel pipe mouth laser divider according to claim 4, characterized in that: The base (430) is provided with a notch, the notch being symmetrical with respect to a vertical bisector of the base (430) parallel to the axis of the steel pipe. The vertical laser ruler (500) is inserted into the notch and is slidably connected to the base (430).

6. A method for dividing a large-diameter steel pipe by using a laser dividing instrument for dividing the pipe opening of the large-diameter steel pipe according to claim 5, characterized in that: The steps include: Leveling base (430): adjusting the horizontal level (450) and the vertical level (460) so that the bubbles of each are located in the middle of the scale line; Measuring the diameter of the inner wall of the steel pipe: turning on the vertical laser ruler (500) to measure the diameter d and radius r of the inner wall of the steel pipe, wherein d=2r; Adjusting the height of the angle fixing plate (200): adjusting the position of the slider (410) so that the scale size of the ruler (420) aligned with the upper end plane of the slider (410) is consistent with the radius r, and at this time, the axis of the angle fixing plate (200) coincides with the axis of the steel pipe; Calibrate the initial point: turn on the laser lamp (100), adjust the scale on the angle rotating disk (300), align the 360° scale line on the angle rotating disk (300) with the 360° scale line on the angle fixing disk (200), and the position where the light beam of the laser lamp (100) irradiates the inner wall of the steel pipe mouth is the initial point; Marking the equal division points: calculating the rotation angle 360° / n of the angle rotating disk (300) each time according to the number n of equal divisions to be made, rotating the angle rotating disk (300) according to the calculated angle 360° / n, and irradiating the inner wall of the pipe mouth with the light beam of the laser lamp (100) after each rotation as the equal division line.

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