Intersecting line lofting and drawing tool and lofting method when two circular pipes are connected in acute-angle intersecting mode

Abstract

The invention discloses an intersecting line lofting and drawing tool and lofting method when two circular pipes are connected in an acute-angle intersecting mode. The intersecting line lofting and drawing tool and lofting method solve the problem of how to draw the intersecting line of the two circular pipes forming the acute angle. Magnetic attraction blocks (2) are arranged on the lower bottom faces, on the two sides of a C opening, of the C-shaped block base (1), shaft sleeve supporting bases (17) are arranged on the top end faces, on the two sides of the C opening, of the C-shaped block base (1), a bearing (4) is horizontally arranged between the two shaft sleeve supporting bases (17), and the outer side end of a first pin shaft (18) is movably connected into a shaft sleeve on the shaft sleeve base (17) on the front side in a penetrating mode. The outer side end of a second pin shaft (19) is movably connected into a shaft sleeve on a shaft sleeve seat on the rear side in a penetrating mode, a center rotating shaft (3) is fixedly connected to a bearing inner ring of a bearing (4), a horizontal cantilever rod (8) is connected to the center rotating shaft (3), and a marking pen (12) is arranged on the horizontal cantilever rod (8); the purpose of drawing the intersecting line on the steel pipe is achieved.

Description

Technical Field

[0001] The invention relates to an intersecting steel pipe, in particular to a tool for drawing and laying out the intersecting line when two round pipes form an acute angle. Background Art

[0002] The steam or water transmission main pipeline of a power plant is often connected with branch pipelines. During the installation of these pipelines, it is necessary to process saddle-shaped connecting ports of the branch pipelines on the main pipelines, and the branch pipelines are butt-welded to the processed connecting ports to form a pipe network system. At present, in the mechanical processing industry, the saddle mouth processing of round pipes mostly adopts software design to form a layout model. After manual layout according to the model, a hole is opened on the wall of the round pipe. In this process, the saddle mouth needs to be marked and laid out on site. This work has high technical requirements for on-site operators, and the work efficiency of on-site workers is limited. In order to improve the drawing and laying out efficiency of on-site operators, technical personnel in this field have developed many layout and marking tools. Patent document No. CN215701644U discloses "a round pipe marking tool, comprising: a center rod; a positioning member, arranged at the center One end of the rod is suitable for fixing the center rod on the wall of the circular tube; the cantilever rod, one end of which is connected to the center rod, and the cantilever rod and the center rod are arranged perpendicularly; the drawing rod, the connecting part of the drawing rod is connected to the cantilever rod, the drawing rod can slide along the extension direction of the cantilever rod, the drawing rod and the center rod are arranged parallel to each other, and the action part of the drawing rod is suitable for drawing lines on the wall of the circular tube. When drawing lines, the circular tube drawing tool, after determining the position of the center line of the opening on the circular tube, fixes the center rod on the circular tube through the positioning piece, so that the distance between the center rod and the drawing rod is consistent with the radius of the connecting pipe, and then rotates the drawing rod around the center rod to draw the "saddle mouth intersection line"; the tool can realize the layout and marking work when the branch pipe and the main pipe are 90 degrees. Since the cantilever rod is difficult to rotate in the Y-axis, when the branch pipe and the main pipe form an acute angle, the tool cannot realize the work of drawing the intersection line of two circular tubes at an acute angle. Summary of the invention

[0003] The invention provides a tool and method for drawing the intersection line when two circular tubes are connected at an acute angle, solving the technical problem of how to draw the intersection line of two circular tubes at an acute angle.

[0004] The present invention solves the above technical problems through the following technical solutions: A tool for drawing and laying out intersection lines when two circular tubes intersect and connect at an acute angle, comprising a C-shaped block base and a main pipeline, wherein magnetic blocks are arranged on the lower bottom surfaces of the C-shaped block bases on both sides of the C-mouth, and shaft sleeve support seats are arranged on the top surfaces of the C-shaped block bases on both sides of the C-mouth, and a bearing is arranged horizontally between the two shaft sleeve support seats, a first pin is fixedly connected to the front side vertical surface of the bearing outer ring of the bearing, a second pin is fixedly connected to the rear side vertical surface of the bearing outer ring of the bearing, and the outer end of the first pin is movable It is movably connected to the sleeve on the front sleeve seat, and the outer end of the second pin shaft is movably connected to the sleeve on the rear sleeve seat. A central rotating shaft is fixedly connected to the inner ring of the bearing, and a horizontal cantilever rod is connected to the central rotating shaft. A slider is movably connected to the horizontal cantilever rod, and a vertical through hole for a marking pen to be connected is provided on the slider, and a marking pen is movably connected in the vertical through hole for the marking pen to be connected; the C-shaped block base is adsorbed on the outer wall of the main pipeline at the intersection with the branch pipeline through a magnetic seat.

[0005] A pointer is connected to the end of the first pin shaft outside the sleeve on the sleeve seat, and an angle dial is arranged on the front side elevation of the C-shaped block base; a length scale is arranged on the horizontal cantilever rod; an axis infrared transmitter for axis indication is arranged at the center of the lower bottom surface of the central rotating shaft; an external thread is arranged at the end of the first pin shaft, and a pin shaft positioning locking nut is screwed on the external thread arranged at the end of the first pin shaft.

[0006] A spring embedding hole is arranged on the lower bottom surface of the C-shaped block base, a limit spring is arranged in the spring embedding hole, a magnet block is connected to the lower end of the limit spring, and a support plate is arranged on the lower bottom surface of the C-shaped block base inside the magnet block.

[0007] A slider positioning and locking top screw is arranged between the horizontal cantilever rod and the slider; a pen holder is movably connected in the vertical through hole for the marking pen to pass through, a marking pen telescopic spring is arranged in the pen holder, a marking pen is inserted in the pen holder below the telescopic spring, and a positioning and fastening top screw of the marking pen holder is arranged between the pen holder and the slider.

[0008] A lofting method using a lofting drawing tool for the intersection line when two circular tubes intersect at an acute angle, characterized by the following steps: The first step is to determine the intersection position of the branch pipeline that intersects with the main pipeline at an acute angle on the outer wall of the main pipeline, and mark the intersection point of the central axis of the branch pipeline and the outer wall of the main pipeline at this position; Step 2: Attach the C-shaped block base to the intersecting position on the main pipeline determined in the first step; Step 3: Rotate the horizontally arranged bearing to make the infrared rays emitted by the axis infrared emitter coincide with the intersection of the central axis of the branch pipe and the outer wall of the main pipe marked in the first step, and lock the up and down swing angle of the bearing by the pin positioning locking nut; Step 4: Move the slider so that the distance between the drawing pen and the infrared ray emitted by the axis infrared emitter is equal to the radius of the intersecting surface when the main pipeline and the branch pipeline are intersecting and connected, and position and lock the movable slider by positioning and locking the top screw of the slider; Step 5. Rotate the horizontal cantilever rod to use the drawing pen to draw the layout line where the branch pipe intersects with the main pipe on the outer wall of the main pipe.

[0009] When performing the fifth step, the positioning and fastening screw of the marker pen holder can be loosened to adjust the telescopic position of the marker pen.

[0010] The beneficial effects of the present invention are as follows: (1) the bearing, the first pin shaft and the second pin shaft form a whole that can be rotated in the up-down direction by relying on the two shaft sleeve support seats, so that the whole marking mechanism can be adjusted according to the angle between the two intersecting circular pipe branches, and the infrared rays emitted by the axial infrared emitter are coincident with the central axis of the branch pipe of the corresponding pipe, so that the marking mechanism draws the intersection line of the two intersecting circular pipes around the central axis of the branch pipe intersecting the main pipe as the central axis of the circle. In this process, the degree of the pointer on the angle dial can accurately indicate whether the angle of the whole rotating in the up-down direction is consistent with the two intersecting angles; (2) through the circumference composed of the horizontal cantilever rod and the scale thereon, the movable slider and the drawing pen The invention relates to a rotating mechanism to adjust and position the radius of the relevant line; (3) the marking pen is connected to the vertical through hole, the pen holder, the marking pen, the marking pen telescopic spring and the positioning and fastening top screw of the marking pen holder to realize the contactable marking of the marking pen on the arc surface of the outer wall of the main pipeline; (4) the limit spring arranged in the spring embedding hole allows the magnet block to be installed in the hole opened in the base, so that when the base is placed on the arc surface of the steel pipe, after the base is supported by the support block, the magnet block is attached to the arc surface of the steel pipe under the action of magnetic force, thereby improving the stability of the magnetic seat installed on the steel pipe surface, and at the same time, it is convenient for the magnetic seat to adapt to steel pipes with different outer diameters, solving the problem of online contact between steel pipes with different outer diameters and the magnetic seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional structural schematic diagram of the present invention; Figure 2 It is a three-dimensional structural schematic diagram of the scribing mechanism of the present invention; Figure 3 It is a schematic structural diagram of a partial half-section view of the scribing mechanism of the present invention in the right viewing direction; Figure 4 yes Figure 3 A schematic diagram of the enlarged structure at A in the middle; Figure 5 yes Figure 3 A schematic diagram of the enlarged structure at B in the middle; Figure 6 It is a working state diagram when the present invention is arranged on the main pipeline 16. DETAILED DESCRIPTION

[0012] The present invention is described in detail below in conjunction with the accompanying drawings: A tool for drawing and laying out intersection lines when two circular tubes intersect and connect at an acute angle, comprising a C-shaped block base 1 and a main pipeline 16, wherein the C-shaped block base 1 is placed horizontally, and magnetic blocks 2 are arranged on the lower bottom surfaces of the C-shaped block base 1 on both sides of the C-mouth, and shaft sleeve support seats 17 are arranged on the top surfaces of the C-shaped block base 1 on both sides of the C-mouth, and a bearing 4 is arranged horizontally between the two shaft sleeve support seats 17, and the bearing 4 is arranged just above the C-mouth of the C-shaped block base 1, and a first pin shaft 18 is fixedly connected to the front side vertical surface of the bearing outer ring of the bearing 4, and a second pin shaft 19 is fixedly connected to the rear side vertical surface of the bearing outer ring of the bearing 4, and the first pin shaft 18 and the second pin shaft 19 are spaced 180 degrees apart, and the outer end of the first pin shaft 18 is movably connected to the shaft sleeve seat on the front side. In the shaft sleeve on 17, the outer end of the second pin shaft 19 is movably connected to the shaft sleeve on the rear shaft sleeve seat, so that the bearing 4 can rotate in the up and down direction under the support of the two shaft sleeve seats 17, so as to facilitate the adjustment of the intersection angle between the two intersecting circular tubes. A central shaft 3 is fixedly connected to the inner ring of the bearing 4, and a horizontal cantilever rod 8 is connected to the central shaft 3. A slider 9 is movably connected to the horizontal cantilever rod 8. A vertical through hole 20 for a marking pen to pass through is provided on the slider 9. A marking pen 12 is movably connected in the vertical through hole 20 for the marking pen to pass through. The horizontal cantilever rod 8 and the marking pen 12 can be rotated and marked with the central shaft 3 as the center of the circle; the C-shaped block base 1 is adsorbed on the outer wall of the main pipeline 16 at the intersection with the branch pipeline through the magnetic seat 2.

[0013] A pointer 6 is connected to the end of the first pin shaft 18 that passes through the sleeve on the sleeve seat 17. The pointer 6 is fixedly connected to the first pin shaft 18 and is used to indicate the angle of the bearing 4 rotated upward, that is, the angle between the two intersecting circular tubes. An angle dial 7 is provided on the front side elevation of the C-shaped block base 1; a length scale is provided on the horizontal cantilever rod 8, and the position of the slider 9 is controlled by the length scale to locate the radius of the intersecting circle; an axis infrared transmitter 15 for axis indication is provided at the center of the lower bottom surface of the central rotating shaft 3, and the infrared rays emitted by the axis infrared transmitter 15 are the extension lines of the central axis of the central rotating shaft 3; an external thread is provided at the end of the first pin shaft, and the pin shaft positioning locking nut 5 is screwed on the external thread provided at the end of the first pin shaft. When the bearing 4 is adjusted in place in the up and down directions, the first pin shaft 18 is tightened in the sleeve on the sleeve seat 17 by rotating the pin shaft positioning locking nut 5, so that the first pin shaft 18 can no longer rotate in the sleeve, thereby realizing the positioning and locking of the rotation angle.

[0014] A spring embedding hole 21 is provided on the lower bottom surface of the C-shaped block base 1, a limit spring 22 is provided in the spring embedding hole 21, a magnet block 23 is connected to the lower end of the limit spring 22, and a support plate 24 is provided on the lower bottom surface of the C-shaped block base 1 inside the magnet block 23; the two support plates 24 are supported on the outer side wall of the main pipeline 16, the limit spring 22 and the magnet block 23 are elastically adsorbed on the outer side wall of the main pipeline 16, so that the C-shaped block base 1 is accurately and stably positioned on the arc-shaped outer side wall of the main pipeline 16.

[0015] A slider positioning and locking top screw 10 is arranged between the horizontal cantilever rod 8 and the slider 9; a pen holder 11 is movably connected in the vertical through hole 20 for the marking pen to pass through, a marking pen telescopic spring 13 is arranged in the pen holder 11, a marking pen 12 is inserted in the pen holder 11 below the telescopic spring 13, and a positioning and fastening top screw 14 of the marking pen holder is arranged between the pen holder 11 and the slider 9; the locking of the movable parts is achieved by the top screws.

[0016] A lofting method using a lofting drawing tool for the intersection line when two circular tubes intersect at an acute angle, characterized by the following steps: The first step is to determine the intersection position of the branch pipes that intersect the main pipe 16 at an acute angle on the outer wall of the main pipe 16, and mark the intersection point of the central axis of the branch pipe and the outer wall of the main pipe 16 at this position; Step 2: Adsorb the C-shaped block base 1 onto the intersecting position on the main pipeline 16 determined in the first step; Step 3: By rotating the horizontally arranged bearing 4, the infrared rays emitted by the axis infrared emitter 15 are made to coincide with the intersection of the central axis of the branch pipe and the outer wall of the main pipe 16 marked in the first step, and the up and down swing angles of the bearing 4 are positioned and locked by the pin-positioning locking nut 5; Step 4: Move the slider 9 so that the distance between the marker pen 12 and the infrared ray emitted by the axis infrared emitter 15 is equal to the radius of the intersecting surface when the main pipeline 16 and the branch pipeline are intersected and connected, and position and lock the movable slider 9 by positioning and locking the top screw 10; Step 5: Rotate the horizontal cantilever rod 8 to make the marker pen 12 draw a layout line 25 on the outer wall of the main pipeline 16 where the branch pipeline intersects with the main pipeline 16 .

[0017] When performing the fifth step, the positioning and fastening screw 14 of the marker pen holder can be loosened to adjust the telescopic position of the marker pen 12.

Claims

1. A tool for drawing and laying out the intersection line when two circular pipes intersect at an acute angle, comprising a C-shaped block base (1) and a main pipe (16), characterized in that: Magnetic blocks (2) are arranged on the lower bottom surfaces of the C-shaped block bases (1) on both sides of the C-mouth, and shaft sleeve support seats (17) are arranged on the top surfaces of the C-shaped block bases (1) on both sides of the C-mouth. A bearing (4) is arranged horizontally between the two shaft sleeve support seats (17). A first pin shaft (18) is fixedly connected to the front side vertical surface of the bearing outer ring of the bearing (4), and a second pin shaft (19) is fixedly connected to the rear side vertical surface of the bearing outer ring of the bearing (4). The outer side end of the first pin shaft (18) is movably connected to the shaft sleeve on the front side shaft sleeve seat (17), and the second pin shaft (19) is fixedly connected to the rear side vertical surface of the bearing outer ring of the bearing (4). The outer end of the (19) is movably connected to the sleeve on the sleeve seat at the rear side, the central shaft (3) is fixedly connected to the inner ring of the bearing (4), the horizontal cantilever rod (8) is connected to the central shaft (3), a slider (9) is movably connected to the horizontal cantilever rod (8), a marking pen connecting vertical through hole (20) is provided on the slider (9), and a marking pen (12) is movably connected to the marking pen connecting vertical through hole (20); the C-shaped block base (1) is adsorbed on the outer wall of the main pipeline (16) at the intersection with the branch pipeline through the magnetic seat (2).

2. The tool for drawing the intersection line when two circular tubes intersect at an acute angle according to claim 1, characterized in that: A pointer (6) is connected to the end of a first pin shaft (18) extending outside a sleeve on a sleeve seat (17); an angle dial (7) is provided on the front side elevation of the C-shaped block base (1); a length scale is provided on the horizontal cantilever rod (8); an axis infrared transmitter (15) for axis indication is provided at the center of the lower bottom surface of the central rotating shaft (3); an external thread is provided at the end of the first pin shaft, and a pin shaft positioning locking nut (5) is screwed onto the external thread provided at the end of the first pin shaft.

3. A tool for drawing intersection lines when two circular tubes intersect at an acute angle according to claim 1 or 2, characterized in that: A spring embedding hole (21) is provided on the lower bottom surface of the C-shaped block base (1), a limit spring (22) is provided in the spring embedding hole (21), a magnet block (23) is connected to the lower end of the limit spring (22), and a support plate (24) is provided on the lower bottom surface of the C-shaped block base (1) inside the magnet block (23).

4. A tool for drawing and laying out the intersection line when two circular tubes intersect at an acute angle according to claim 3, characterized in that: A slider positioning locking top screw (10) is provided between the horizontal cantilever rod (8) and the slider (9); a pen holder (11) is movably connected in the marking pen connecting vertical through hole (20); a marking pen telescopic spring (13) is provided in the pen holder (11); a marking pen (12) is inserted into the pen holder (11) below the telescopic spring (13); and a positioning fastening top screw (14) of the marking pen holder is provided between the pen holder (11) and the slider (9).

5. A method for drawing a lofting tool for drawing a line of intersection of two circular tubes intersecting at an acute angle as claimed in claim 4, characterized by the following steps: The first step is to determine the intersection position of the branch pipe that intersects with the main pipe (16) at an acute angle on the outer wall of the main pipe (16), and mark the intersection point of the central axis of the branch pipe and the outer wall of the main pipe (16) at the position; Step 2: Adsorb the C-shaped block base (1) onto the intersecting position on the main pipeline (16) determined in Step 1; Step 3: By rotating the horizontally arranged bearing (4), the infrared rays emitted by the axis infrared emitter (15) coincide with the intersection of the central axis of the branch pipe and the outer wall of the main pipe (16) marked in the first step, and the up and down swing angle of the bearing (4) is positioned and locked by the pin positioning locking nut (5); Step 4: Move the slider (9) so that the distance between the marker pen (12) and the infrared rays emitted by the axis infrared emitter (15) is equal to the radius of the intersecting surface when the main pipeline (16) and the branch pipeline are intersected and connected, and position and lock the movable slider (9) by positioning and locking the top screw (10) of the slider; The fifth step is to rotate the horizontal cantilever rod (8) so that the drawing pen (12) draws a layout line (25) on the outer side wall of the main pipeline (16) where the branch pipeline intersects and connects with the main pipeline (16).

6. A method for laying out a line when two circular tubes intersect at an acute angle using a drawing tool as claimed in claim 5, characterized in that: When performing the fifth step, the positioning and fastening top screw (14) of the marker pen holder can be loosened to adjust the telescopic position of the marker pen (12).

Images