Method for improving positioning and scribing precision and speed of pipe saddle opening

Abstract

The invention provides a method for improving the positioning and scribing precision and speed of a pipe saddle opening in the field of pipelines. Comprising the following steps: step 1, selecting an adaptive porous saddle ring according to the sizes of a pipe and a saddle opening, and manufacturing corresponding laser, a center hole positioning block and a center hole positioning ring according to the porous saddle ring; 2, a porous saddle ring is located at a pipe saddle opening, a center hole positioning ring is assembled to a laser and center hole positioning block, the laser and center hole positioning block is contained in the porous saddle ring, a laser emitter is assembled in the middle of the laser and center hole positioning block, and a corresponding number of pressing type punchers / pens are selected; thirdly, the laser and center hole positioning block is fixed to the pipe to be machined; and 4, point position marking is conducted by means of laser and the center hole positioning block in combination with a laser emitter, a pressing type puncher / pen and a center hole positioning ring, a line is formed after marking, the saddle opening is positioned, and the line marking process is finished. And the positioning and scribing precision and speed of the saddle opening are improved.

Description

Technical Field

[0001] The invention relates to a saddle mouth in the field of pipelines, and in particular to a method for improving the positioning, marking accuracy and speed of the saddle mouth of a pipe. Background Art

[0002] The shipbuilding industry is complex and the piping systems are diverse. During construction, pipes of various calibers and materials need to be cut and welded. Before cutting the saddles, positioning and marking are required to ensure the accuracy of subsequent cutting.

[0003] However, the inventors of this application found that the above technology has at least the following technical problems in the process of implementing the technical solution of the invention in the embodiment of this application: At present, pipe saddles are generally made using paper templates or by positioning and marking through calculations. The efficiency and accuracy of individual construction are not high, and the existing construction methods are not suitable for batch operations. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present application provides a method for improving the positioning and marking accuracy and speed of the pipe saddle mouth in view of the problems of pipe saddle mouth positioning and marking. The method uses a laser and a center hole positioning block and a laser transmitter to perform high-precision positioning and marking of the pipe saddle mouth, and can also meet the needs of batch production. Although the first piece operation time of the pipe saddle mouth of the same specification is increased, the batch operation improves the overall construction efficiency and quality, and solves the technical problems of pipe saddle mouth positioning and marking.

[0005] The solution adopted by the embodiment of the present application to solve the technical problem is: A method for improving the positioning, marking accuracy and speed of a pipe saddle mouth comprises the following steps: Step 1: Select a suitable porous saddle ring according to the size of the pipe and the saddle mouth, and then make corresponding laser and center hole positioning blocks and center hole positioning rings according to the porous saddle ring; Step 2: Place the porous saddle ring at the saddle mouth of the pipe, assemble the center hole positioning ring on the laser and center hole positioning block, store the laser and center hole positioning block in the porous saddle ring, assemble the laser transmitter in the middle of the laser and center hole positioning block, and select the corresponding number of push-type punchers / pens; Step 3, fix the laser and center hole positioning block on the pipe to be processed; Step 4: Use laser and center hole positioning block in combination with laser transmitter, push-type puncher / pen, and center hole positioning ring to mark points. After marking, connect them into lines, and the saddle mouth positioning and marking process is completed.

[0006] Furthermore, in the step 1, one end of the porous saddle ring is a plane and the other end is a curved surface; an annular hole is arrayed on the wall of the porous saddle ring for drawing the dotted line of the edge line of the saddle mouth when the curved surface fits the tube; four slits are provided on the curved surface side of the porous saddle ring, and the slit width is 2-4 mm for viewing the projection of the laser ray; Specifically, a vernier caliper is used to measure the outer diameter of the pipe end face, and the diameter, height, and number of openings on the saddle ring plane of the porous saddle ring are calculated; Among them, the diameter D of the porous saddle ring: according to the requirements of the construction drawing or on-site measurement, the inner diameter of the porous saddle ring is consistent with the inner diameter of the pipe and the saddle mouth; Height calculation method for porous saddle ring: recommended value 0.75D≤height≤2D, or after confirming the pipe diameter and saddle mouth diameter, ensure that the distance between the lowest point w of the saddle-shaped surface and the saddle ring plane is greater than 10mm; Method for calculating the number of holes on a multi-hole saddle ring plane: the spacing between two holes is less than the inner diameter of the hole. Perform mathematical calculations based on the size of the holes and the circumference of the saddle ring, or use CAD to draw a circle for observation and confirmation to ensure the spacing.

[0007] Furthermore, in the step 1, the laser and center hole positioning block is a cross-shaped structure, and four gaps are arranged adjacent to the cross-shaped portions of the laser and center hole positioning block, and the gap width is 2-4 mm to ensure that the laser beam can pass through, and is used for drawing points and lines of laser projection; an axial hole is arranged at the center of the laser and center hole positioning block, and is used to assemble a laser transmitter, and the cross-shaped laser will pass through the four gaps of the laser and center hole positioning block and be projected onto the pipe; at the same time, the axial hole at the center of the laser and center hole positioning block can also be equipped with a center hole positioning ring, and a press-type puncher / pen passes through the center hole positioning ring to mark the center point; The cross-shaped outer contour of the laser and center hole positioning block is an arc shape, and the outer diameter of the laser and center hole positioning block corresponds to the inner diameter of the porous saddle ring, so that the laser and center hole positioning block is inserted into the porous saddle ring, and the height of the laser and center hole positioning block is greater than the height of the porous saddle ring; A step is arranged at the end of the laser and center hole positioning block, which is used for axially limiting the laser and center hole positioning block in the porous saddle ring.

[0008] Specifically, the outer diameter of the laser and center hole positioning block 1 is clearance-matched with the inner diameter of the porous saddle ring, and an error of 0.2-0.4 mm is reserved. The laser and center hole positioning block is inserted into the porous saddle ring.

[0009] Furthermore, the center hole positioning ring is a sleeve structure, which is embedded in the center of the laser and the center hole positioning block, and the push-type puncher / pen passes through the center hole positioning ring to locate the center point.

[0010] Furthermore, in the step 2, the laser emitter has various forms, and can be cylindrical in shape and emit a straight or cross-shaped laser.

[0011] Furthermore, in the step 2, the number of push-type punches / pens is greater than 1, and the specific number is not limited. Push-type punches / pens can also be installed in advance in all the annular holes of the porous saddle rings.

[0012] Furthermore, in step three, the pipe needs to be marked with reference lines in advance according to construction requirements, the edge point of the saddle mouth at the highest point of the pipe needs to be clearly identified, and the porous saddle ring is attached to the pipe according to the reference line.

[0013] Specifically, when positioning the porous saddle ring, you can use tape to stick it directly. If it is carbon steel, you can use a magnetic rod to insert it into the annular hole for positioning, which is convenient and quick to remove.

[0014] Furthermore, in the step 4, first, the laser and the center hole positioning block are inserted into the porous saddle ring, and the laser and the center hole positioning block are rotated so that the opening position of the outer edge of the gap is opposite to the saddle mouth reference line; Secondly, insert the laser transmitter into the center of the laser and the center hole positioning block, light up the laser transmitter, and the cross-shaped laser will pass through the four gaps of the laser and the center hole positioning block. At the same time, the cross-shaped laser is projected on the surface of the pipe. At this time, use a press-type puncher / pen to mark the points on the cross laser projection path and the inner hole of the porous saddle ring; Next, after the points are marked, remove the push-type punch / pen, replace the center hole positioning ring, and then use the push-type punch / pen to mark the center point; Finally, after marking all the points, use a push-type puncher / pen to connect the marked points on the surface of the tube into lines in sequence, and then perform the saddle mouth cutting work according to the lines.

[0015] Positive effects: The technical solution provided in the embodiments of the present application has at least the following technical effects or advantages: 1. Since the embodiment of the present application adopts a technical means of setting four gaps at the cross-shaped adjacent parts of the laser and the center hole positioning block, and setting an axial hole assembly laser emitter in the center of the laser and the center hole positioning block, the cross-shaped laser emitted by the laser emitter can pass through the four gaps of the laser and the center hole positioning block and be projected onto the pipe to draw points and lines, which effectively solves the technical problems of positioning and marking the saddle mouth of the pipe in the prior art, thereby achieving the technical effect of positioning and marking the saddle mouth of the pipe.

[0016] 2. Since the embodiment of the present application adopts the technical means of installing a push-type puncher / pen in the annular hole of the porous saddle ring, when a laser emitter is used to perform dotting and marking on the laser and center hole positioning block, multi-point dotting can be used at the same time, which effectively solves the technical problems of positioning and marking the saddle mouth of the pipe in the prior art, thereby achieving the technical effect of improving the dotting efficiency.

[0017] 3. Since the embodiment of the present application adopts the technical means of selecting a cross-shaped laser emitter, the cross-shaped laser of the laser emitter can pass through the four gaps of the laser and the center hole positioning block, and then the cross-shaped laser is projected onto the surface of the pipe, so that a push-type puncher / pen is used to mark points on the cross laser projection path and the inner hole of the porous saddle ring, effectively solving the technical problems of positioning and marking the saddle mouth of the pipe in the prior art, and thus achieving the technical effect of improving the positioning and marking efficiency of the saddle mouth.

[0018] 4. Since the embodiment of the present application adopts the technical means of directly sticking the porous saddle ring with tape when positioning, and inserting a magnetic rod into the annular hole for positioning if it is carbon steel, the porous saddle ring and the pipe can be fitted tightly and can be removed quickly and conveniently, effectively solving the technical problems of positioning and marking the saddle mouth of the pipe in the prior art, thereby achieving the technical effect of improving the positioning and marking accuracy and speed of the saddle mouth of the pipe.

[0019] The invention is suitable for use as a method for improving the positioning, marking accuracy and speed of the saddle mouth of a pipe. 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 labor.

[0021] Figure 1 This is a schematic diagram of the structure of this embodiment; Figure 2 It is a schematic diagram of a porous saddle ring; Figure 3 This is the front view of the porous saddle ring; Figure 4 It is a side view of a multi-hole saddle ring; Figure 5 It is a top view of the porous saddle ring; Figure 6 This is a schematic diagram of the laser and center hole positioning block; Figure 7 This is the front view of the laser and center hole positioning block; Figure 8 This is a side view of the laser and center hole positioning block; Fig. 9 This is a top view of the laser and center hole positioning block; Fig.10 This is a schematic diagram of the center hole positioning ring; Fig.11 Schematic diagram of a push-type hole punch / pen.

[0022] In the figure, 1. Laser and center hole positioning block; 2. Multi-hole saddle ring; 3. Tube; 4. Laser transmitter; 5. Push-type puncher / pen; 6. Center hole positioning ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Although the embodiments of the present invention have been shown and described, it can be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of the present invention.

[0024] As shown in the figure, a method for improving the positioning, marking accuracy and speed of the saddle mouth of a pipe includes the following steps: Step 1: Use a vernier caliper to measure the outer diameter of the end face of the pipe 3, and calculate the diameter, height, and number of holes on the plane of the porous saddle ring 2. The diameter D of the saddle ring is measured according to the construction drawing requirements or on-site on-demand measurement; the number of holes is calculated as follows: the spacing between the two holes is less than the inner diameter of the hole. According to the size of the hole and the circumference of the saddle ring, mathematical calculations are performed or the circumference of the CAD drawing is used for observation and confirmation to ensure the spacing; the height of the saddle ring is calculated as follows: the recommended value is 0.75D≤height≤2D, or after confirming the pipe diameter and the saddle mouth diameter, ensure that the distance between the lowest point w of the saddle-shaped surface and the plane of the saddle ring is greater than 10mm. If this distance is too short, the strength of the punch cannot be guaranteed. At the same time, the deeper the hole, the less likely it is to be off-center; after confirming each size, use CNC machining or 3D printing technology to make the porous saddle ring 2; Step 2: According to the inner diameter and height of the porous saddle ring 2, the laser and center hole positioning block 1 is adapted. The width of the four gaps inside the laser and center hole positioning block 1 is 2-4mm to ensure that the laser beam passes through. The height of the laser and center hole positioning block 1 is greater than the height of the porous saddle ring 2. The outer diameter of the laser and center hole positioning block 1 is clearance-matched with the inner diameter of the porous saddle ring 2, and a 0.2-0.4mm error is reserved. The error can be appropriately adjusted according to the processing accuracy requirements to ensure flexible assembly and plugging. After the size is confirmed, the laser and center hole positioning block 1 is manufactured using CNC processing or 3D printing technology; Step 3, making a center hole positioning ring according to the laser and the center hole diameter of the center hole positioning block 1; Step four, assemble the laser and center hole positioning block 1, porous saddle ring 2, tube 3, laser emitter 4, push-type puncher / pen 5, and center hole positioning ring 6. The porous saddle ring 2 is located on the tube 3, the center hole positioning ring 6 is assembled on the laser and center hole positioning block 1, the laser and center hole positioning block 1 is housed in the porous saddle ring 2, and the laser emitter 4 is assembled in the middle of the laser and center hole positioning block 1. During assembly, an appropriate number of push-type punchers / pens 5 should be selected to improve work efficiency.

[0025] Step five, fix the pipe 3 that needs to have a saddle mouth on the platform, adjust the angle according to other process requirements of the pipe 3, and fix and tighten it. It should be noted here that the reference line of the pipe must be marked in advance according to the construction requirements, and the edge point of the saddle mouth at the highest point of the pipe must be clearly identified. Fit the porous saddle ring 2 on the pipe 3 according to the reference line. Since the curved surface of the porous saddle ring 2 is consistent with the outer diameter R of the pipe 3, it can be fit tightly. After fitting, use tin foil tape, paper tape or other tape to position and fix the porous saddle ring 2. If it is a carbon steel pipe, 3 / 4 / 6 / 8 or other magnetic bars can be inserted into the hole of the porous saddle ring 2 for positioning and fixing.

[0026] Step six, insert the laser and center hole positioning block 1 into the porous saddle ring 2. It should be noted that the laser and center hole positioning block 1 can rotate inside the porous saddle ring 2. Rotate the laser and center hole positioning block 1 to ensure that the opening position of the outer edge is facing the saddle mouth reference line.

[0027] Step seven, insert the laser emitter 4 into the center position of the laser and the center hole positioning block 1. Note that the laser emitter 4 can be selected from conventional flat or cross models. Generally, the cross model is selected. Light up the laser emitter 4, and the cross laser will pass through the four gaps of the laser and the center hole positioning block 1. At the same time, the cross laser will be projected onto the surface of the tube 3. At this time, use a push-type puncher / pen 5 to mark the points on the cross laser projection path and the inner hole of the porous saddle ring 2. After the points are marked, remove the push-type puncher / pen 5, replace the center hole positioning ring 6, and then use the push-type puncher / pen 5 to mark the center point. After all the points are marked, remove all useless materials. At this time, use the push-type puncher / pen 5 to connect the marked points on the surface of the tube 3 in sequence into lines, and then perform saddle mouth cutting according to the lines.

[0028] Preferably, one end of the porous saddle ring 2 is a plane and the other end is a curved surface; an annular hole is arrayed on the wall of the porous saddle ring 2 for drawing the dotted line of the edge line of the saddle mouth when the curved surface fits the tube 3; four slits are provided on the curved side of the porous saddle ring 2 for viewing the laser beam; the inner diameter of the porous saddle ring 2 is consistent with the inner diameter of the tube 3 and the saddle mouth.

[0029] Preferably, the laser and center hole positioning block 1 is a cross-shaped structure, and four gaps are arranged adjacent to the cross of the laser and center hole positioning block 1, and the gap width is 2-4mm to ensure that the laser beam can pass through; an axial hole is arranged in the center of the laser and center hole positioning block 1 for assembling the laser transmitter 4, and the cross-shaped laser will pass through the four gaps of the laser and center hole positioning block 1 and be projected onto the tube 3; at the same time, the axial hole in the center of the laser and center hole positioning block 1 can also be equipped with a center hole positioning ring 6, and the push-type puncher / pen 5 passes through the center hole positioning ring 6 to mark the center point; the cross-shaped outer contour of the laser and center hole positioning block 1 is an arc shape, and the outer diameter of the laser and center hole positioning block 1 corresponds to the inner diameter of the porous saddle ring 2, so that the laser and center hole positioning block 1 is inserted into the porous saddle ring 2, and the height of the laser and center hole positioning block 1 is greater than the height of the porous saddle ring 2; a step is arranged at the end of the laser and center hole positioning block 1 for axially limiting the laser and center hole positioning block 1 in the porous saddle ring 2.

[0030] Preferably, the center hole positioning ring 6 is a sleeve structure, which is embedded in the center of the laser and center hole positioning block 1, and the push-type puncher / pen 5 passes through the center hole positioning ring 6 to locate the center point.

[0031] Preferably, the laser emitter 4 has various forms, and may be cylindrical in shape and emit a straight or cross-shaped laser.

[0032] Preferably, the number of the push-type punches / pens 5 is greater than 1, and the specific number is not limited. The push-type punches / pens 5 can also be installed in advance in the annular holes of all the porous saddle rings 2.

[0033] Laser and center hole positioning block 1.; porous saddle ring 2.; tube 3.; laser transmitter 4.; push-type puncher / pen 5.; center hole positioning ring 6.

[0034] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages: Since four gaps are arranged at the cross-shaped adjacent parts of the laser and the center hole positioning block 1, and an axial hole assembly laser emitter 4 is arranged in the center of the laser and the center hole positioning block 1, the cross-shaped laser emitted by the laser emitter 4 can pass through the four gaps of the laser and the center hole positioning block 1, and be projected onto the tube 3 to draw points and lines, thereby realizing the positioning and marking of the saddle mouth of the tube.

[0035] Since the push-type puncher / pen 5 can be installed in the annular hole of the porous saddle ring 2, when the laser transmitter 4 is used to perform dotting and marking on the laser and center hole positioning block 1, multiple dotting can be performed at the same time, thereby improving the efficiency of dotting.

[0036] Since the laser emitter 4 is a cross model, the cross-shaped laser of the laser emitter 4 can pass through the four gaps of the laser and the center hole positioning block 1, and then the cross-shaped laser is projected on the surface of the tube 3, so that the push-type puncher / pen 5 can be used to mark the points on the cross laser projection path and the inner hole of the porous saddle ring 2 to improve work efficiency.

[0037] Since the porous saddle ring 2 can be directly pasted with tape when positioning, and if it is carbon steel, a magnetic rod can be inserted into the annular hole for positioning, the porous saddle ring 2 and the pipe 3 can be fitted tightly and can be removed quickly and easily, thereby improving the positioning and marking accuracy and speed of the pipe saddle mouth.

[0038] It is worth noting that the contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of the laser emitter 4 and the push-type puncher / pen 5 are not specifically limited and can be determined using conventional equipment. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for improving the positioning, marking accuracy and speed of a pipe saddle mouth, characterized by: The following steps are involved: Step 1: Select a suitable porous saddle ring (2) according to the size of the tube (3) and the saddle mouth, and then make a corresponding laser and center hole positioning block (1) and a center hole positioning ring (6) according to the porous saddle ring (2); Step 2: Place the porous saddle ring (2) at the saddle mouth of the tube (3), assemble the center hole positioning ring (6) on the laser and center hole positioning block (1), store the laser and center hole positioning block (1) in the porous saddle ring (2), assemble the laser transmitter (4) in the middle of the laser and center hole positioning block (1), and select a corresponding number of push-type punchers / pens (5); Step 3, fix the laser and center hole positioning block (1) on the tube to be processed (3); Step 4: Use laser and center hole positioning block (1) in combination with laser transmitter (4), push-type puncher / pen (5), and center hole positioning ring (6) to mark points, connect them into lines after marking, and the saddle mouth positioning and marking process is completed.

2. A method for improving the positioning, marking accuracy and speed of a pipe saddle mouth according to claim 1, characterized in that: In the step 1, one end of the porous saddle ring (2) is a flat surface, and the other end is a curved surface; an annular hole array is arranged on the wall of the porous saddle ring (2), which is used for drawing the dotted line of the edge line of the saddle mouth when the curved surface is fitted with the tube (3); four slits are arranged on the curved surface side of the porous saddle ring (2), and the slit width is 2-4 mm, which are used to check the projection of the laser beam.

3. A method for improving the positioning, marking accuracy and speed of a pipe saddle mouth according to claim 2, characterized in that: Use a vernier caliper to measure the outer diameter of the end face of the tube (3), and calculate the diameter, height, and number of holes on the plane of the porous saddle ring (2); Wherein, the diameter D of the porous saddle ring (2) is: according to the requirements of the construction drawing or on-site measurement as needed, the inner diameter of the porous saddle ring (2) is consistent with the inner diameter of the pipe (3) and the saddle mouth; The height calculation method of the porous saddle ring (2): the recommended value is 0.75D≤height≤2D, or after confirming the pipe diameter and the saddle mouth diameter, ensure that the distance between the lowest point w of the saddle-shaped surface and the saddle ring plane is greater than 10mm; Multi-hole saddle ring (2) Calculation method for the number of planar openings: The spacing between two holes is less than the inner diameter of the opening. Perform mathematical calculations based on the size of the openings and the circumference of the saddle ring or use CAD to draw a circle for observation and confirmation to ensure the spacing.

4. A method for improving the positioning, marking accuracy and speed of a pipe saddle mouth according to claim 1, characterized in that: In the step 1, the laser and center hole positioning block (1) is a cross-shaped structure, and four gaps are arranged adjacent to the cross of the laser and center hole positioning block (1), and the gap width is 2-4 mm to ensure that the laser beam can pass through, which is used for drawing points and lines projected by the laser; an axial hole is arranged at the center of the laser and center hole positioning block (1) for assembling a laser transmitter (4), and the cross-shaped laser will pass through the four gaps of the laser and center hole positioning block (1) and be projected onto the tube (3); at the same time, the axial hole at the center of the laser and center hole positioning block (1) can also be equipped with a center hole positioning ring (6), and a press-type puncher / pen (5) passes through the center hole positioning ring (6) to mark the center point; The cross-shaped outer contour of the laser and center hole positioning block (1) is an arc shape, and the outer diameter of the laser and center hole positioning block (1) corresponds to the inner diameter of the porous saddle ring (2), so that the laser and center hole positioning block (1) is inserted into the porous saddle ring (2), and the height of the laser and center hole positioning block (1) is greater than the height of the porous saddle ring (2); A step is provided at the end of the laser and center hole positioning block (1) for axially limiting the laser and center hole positioning block (1) in the porous saddle ring (2).

5. A method for improving the positioning, marking accuracy and speed of a pipe saddle mouth according to claim 4, characterized in that: The outer diameter of the laser and center hole positioning block (1) is clearance-matched with the inner diameter of the porous saddle ring (2), with a reserved error of 0.2-0.4 mm. The laser and center hole positioning block (1) is inserted into the porous saddle ring (2).

6. A method for improving the positioning, marking accuracy and speed of a pipe saddle mouth according to claim 1, characterized in that: The center hole positioning ring (6) is a shaft sleeve structure, which is embedded in the center of the laser and center hole positioning block (1), and the press-type puncher / pen (5) passes through the center hole positioning ring (6) to locate the center point.

7. A method for improving the positioning, marking accuracy and speed of a pipe saddle mouth according to claim 1, characterized in that: In the step 2, the laser emitter (4) has various forms, and may be cylindrical in shape and emit a straight or cross-shaped laser.

8. A method for improving the positioning, marking accuracy and speed of a pipe saddle mouth according to claim 1, characterized in that: In the step 2, the number of the push-type punchers / pens (5) is greater than 1, and the specific number is not limited. The push-type punchers / pens (5) can also be installed in advance in the annular holes of all the porous saddle rings (2).

9. A method for improving the positioning, marking accuracy and speed of a pipe saddle mouth according to claim 1, characterized in that: In the step 3, the pipe (3) needs to be marked with reference lines in advance according to the construction requirements, and the edge point where the saddle mouth is located at the highest point of the pipe needs to be clearly identified, and the porous saddle ring (2) is attached to the pipe (3) according to the reference lines; When positioning the porous saddle ring (2), adhesive tape can be used to directly stick it. If it is made of carbon steel, a magnetic rod can be inserted into the annular hole for positioning.

10. A method for improving the positioning, marking accuracy and speed of a pipe saddle mouth according to claim 9, characterized in that: In the step 4: First, insert the laser and center hole positioning block (1) into the porous saddle ring (2), and rotate the laser and center hole positioning block (1) so that the opening position of the outer edge of the gap faces the saddle mouth reference line; Secondly, insert the laser transmitter (4) into the center of the laser and center hole positioning block (1), light up the laser transmitter (4), and a cross-shaped laser will pass through the four gaps of the laser and center hole positioning block (1). At the same time, the cross-shaped laser is projected on the surface of the tube (3). At this time, use a press-type puncher / pen (5) to mark the points on the projection path of the cross laser and the inner hole of the porous saddle ring (2); Next, after the point is marked, remove the push-type punch / pen (5), replace the center hole positioning ring (6), and then use the push-type punch / pen (5) to mark the center point; Finally, after marking all the points, the marked points on the surface of the tube (3) are sequentially connected into lines using a push-type puncher / pen (5), and the saddle mouth cutting work is subsequently performed according to the lines.

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