Pipeline scribing ring tool
By designing a scribe tool for pipes, the problem of low straightness of the inclined surface of the pipe is solved, and more efficient and accurate inclined port production and welding quality are achieved.
Patent Information
- Application Number
- CN202420286026.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-06
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-02-06
AI Technical Summary
In the prior art, the inclined surface of the pipe is not straightened after the pipe is cut, resulting in the pipe opening not being in the same plane, affecting the welding quality.
A pipe scribe tool is designed, including a cylindrical structure scribe body and a removable fastener. It is sleeved outside the pipe and fixed in a four-equivalent line position, and the scribe body is compared with the scribe body by using a steel knife. The coil is drawn out of the outer edge of the surface to ensure high straightness of the inclined surface.
The speed and accuracy of inclined port production are improved, the grinding time is reduced, and the uniformity of welding gap and welding quality are ensured.
Smart Images
Figure CN222450282U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipeline marking devices, in particular to a pipeline marking coil tool. Background Art
[0002] In the routine maintenance of pipelines and emergency repairs of pipeline trunk lines, whether it is replacing straight pipe sections or adding welding valves, elbows, tee fittings, etc., the pipeline will be released from stress after being disconnected due to multiple factors such as terrain pressure, environmental changes, and the pipeline's own stress, resulting in problems such as the pipeline's axis being misaligned up, down, left, or right. In order to ensure that the pipelines are installed in pairs under a stress-free state, the ends of the pipelines need to be set to a bevel at a certain angle for pair connection, thereby solving the problem of pipeline axis misalignment. The quality of the bevel production must strictly comply with the requirements of the welding process regulations, including the groove angle, pair gap, misalignment (misalignment between the axis lines of the paired pipes), etc., so the straightness of the bevel production is particularly important.
[0003] The existing technology is to use a steel or copper thin plate ring belt (narrow ring belt) to tighten around the outer wall of the pipe to draw the bevel line. The narrow ring belt is a stainless steel metal sheet with a width of 30-50mm and a thickness of 0.5mm. The stability of the narrow ring belt is not high. The bevel line drawn by the narrow band ring may appear wavy, so that after cutting along the marked coil, the pipe mouth is not in the same plane, and the straightness of the pipe mouth is poor. Then, the pipe mouth needs to be polished into a plane, which will result in a large amount of polishing work. At the same time, the quality of the bevel marking will directly affect the uniformity of the gap between the welds after the pipe assembly, and in severe cases, it will also affect the welding quality. Therefore, the quality of the bevel marking is a working condition problem that has not been properly solved for a long time. Summary of the invention
[0004] The utility model aims to overcome the problem in the prior art that the straightness of the bevel surface of the pipe after circle cutting is not high, and provides a pipe circle cutting tool. The pipe circle cutting tool has a simple structure, is easy to operate, can accurately cut the pipe bevel, and has a high straightness of the bevel surface after cutting along the marking line, thereby improving the speed and accuracy of bevel production.
[0005] In order to achieve the above-mentioned purpose, the utility model provides a pipe marking coil tool, which is used for pipe marking, including a marking coil body with a cylindrical structure, and a fastener detachably connected to the marking coil body, the marking coil body is sleeved on the outside of the pipe, the fastener abuts against the pipe, the inner diameter of the marking coil body is 10 to 30 mm larger than the outer diameter of the pipe, and the thickness of the marking coil body is 20 to 60 mm.
[0006] In pipeline maintenance operations, it is usually necessary to cut off the problematic pipe section on the in-service pipeline and replace it with a new short section of prefabricated pipeline. During the process of cutting the in-service pipeline, due to the influence of the pipeline's own stress, the end face of the in-service pipeline after cutting will be formed into a non-straight cut state, but an oblique cut state. In order to better connect with the in-service pipeline with an oblique cut, the short section of the prefabricated pipeline needs to be cut into an oblique cut end face (matching the end face of the in-service pipeline after cutting). The wire marking tool of the present application is to cut the short section of the prefabricated pipeline with a straight cut into oblique cut end faces whose two end faces can accurately match the in-service pipeline, so as to better realize the assembly and welding of the short section of the prefabricated pipeline and the in-service pipeline, and complete the repair of the in-service pipeline.
[0007] How to use the circle drawing tool:
[0008] First, use a level ruler and a ruler to perform manual measurement, and draw clear four-equal (horizontal and vertical) marking lines at the upstream and downstream pipeline ports of the in-service pipeline and the port positions of the short-section prefabricated pipeline. At the same time, use a straight-mouthed ring tape to circle a circle of straight-mouthed lines at the appropriate position upstream (or downstream) of the in-service pipeline, and mark the intersection with the four-equal-section lines;
[0009] Second, measure the deviation angle and tip length of the in-service pipeline bevel cut. Use existing tools to measure the distance from the intersection to the horizontal extension point at the end of the pipeline. The difference between the upper and lower dimension values is the length that needs to be cut off, which is the tip length; the difference between the left and right dimension values is the deviation value. At the same time, the measured data can be used to calculate whether the pipeline bevel meets the standard requirements (if it does not meet the standard requirements, the end face needs to be polished again). According to the upper and lower, left and right values, the precise positions of the corresponding four cutting positioning points can be determined on the short section prefabricated pipeline;
[0010] Third, mark the cutting positioning points and lines, take the straight line of the end face of the short section prefabricated pipe as the basic center of the marking, and mark half of the upper and lower and left and right deviation size values according to the aforementioned tip length and the weld gap length required by the weld standard, and mark the points at half forward of one end and half backward of one end. In this way, four cutting line positioning points are marked on the four-equal-section line, and then the wire marking tool of the present application is put on the outside of the pipe, around the pipe at the four-equal-section line position and matching the four cutting line positioning points, and then use fasteners to fix the wire marking tool on the outside of the pipe, and then use a steel knife to mark the complete cutting line in accordance with the wire marking tool, that is, the first bevel marking is completed;
[0011] Fourth, mark the cutting line of the second bevel. According to the length of the prefabricated short section pipe (according to the welding conditions, the groove angle length and the size of the weld gap need to be calculated), start from the first bevel cutting positioning point, measure the position of the second cutting opening in the direction of the other end of the pipe, and mark the cutting positioning point. Then use the marking circle tool to mark the second bevel.
[0012] Fifth, for bevel cutting, use a flame cutting machine to manually adjust the cutting nozzle position, cut along the marked cutting line, and complete the bevel cutting of the pipe.
[0013] The pipe coiling tool is a cylindrical structure, which is convenient for being put on the outside of the pipe. At the same time, the end face of the cylinder is in a plane. The coil drawn after using the coiling tool of the present application is a coil in a plane. The fastener fixes the coiling body to the outside of the pipe by abutting against the pipe and connecting with the coiling body. When the coiling body is adjusted to the required position, it is fixed with the fastener, or the fixing and adjustment can be carried out in coordination. After the coiling body is fixed in the required position, a steel knife is used to draw a coil on the outer wall of the pipe in accordance with the outer edge of the coiling body. After the coil is drawn, the coiling tool can be disassembled and taken out.
[0014] The inner diameter of the coil body is 10 to 30 mm larger than the outer diameter of the pipe. The coil body can be easily put on the outside of the pipe. The tilt angle of the coil body can meet the working conditions. At the same time, it is also beneficial for the steel knife to draw circles smoothly along the edge of the coil body. The thickness of the coil body is set to 20 to 60 mm, which makes the coil body more stable and will not deform itself during the marking process. It is also beneficial for the steel knife to draw the coil more quickly along the coil body, so that the coil finally drawn by the coil marking tool can meet the working conditions.
[0015] Preferably, the width of the coil body is 20 to 60 mm.
[0016] In order to further improve the stability of the coil marking tool, the width of the coil marking body is set to 20-60 mm.
[0017] It should be noted that when the wire marking tool is used to mark the bevel of the pipeline, the inclination angle θ between the wire marking tool body and the pipeline is θ≤4°. In order to comply with the operation standard, the inclination angle between the wire marking tool and the pipeline needs to be set to 4° or less.
[0018] Preferably, fastening grooves are provided on the scribing coil body, and a plurality of fastening grooves are provided, and the fastening grooves are cooperatively connected with the fasteners.
[0019] A fastening groove is provided on the coil body, and a fastener is connected to the coil body through the fastening groove, which is an embodiment of connecting the coil body and the fastener. In order to stably connect the coil body to the pipeline, multiple groups of fastening grooves are provided, and multiple groups of fasteners that cooperate with the fastening grooves are matched, so that the coil body can be fixed at multiple points.
[0020] Preferably, there are four fastening grooves, which are concentrically arranged and evenly distributed.
[0021] The four fastening grooves are arranged as a preferred embodiment of the fastening groove arrangement, the four fastening grooves match four groups of fasteners, the four groups of fastening grooves are concentrically arranged and evenly distributed, so that the distribution positions of the four fastening grooves on the coil body are directly above, directly below, directly left and directly right.
[0022] Preferably, the fastener is configured as a glass ball screw, and the fastening groove is configured as a threaded hole that cooperates with the glass ball screw.
[0023] In order to simplify the fastener structure and improve the stability of the connection between the coil body and the pipe, the fastener can be set as a glass bead screw, and the fastening groove can be set as an internal threaded hole that matches the glass bead screw structure. This makes the installation and removal of the coil tool easy and fast. At the same time, the part of the glass bead screw that abuts against the pipe is bead-shaped, so that the connection between a single glass bead screw and the outer wall of the pipe is a point connection, and the connection between multiple groups of glass bead screws and the outer wall of the pipe is an arc line connection, thereby improving the stability of the connection between the coil body and the outside of the pipe.
[0024] Preferably, the wire drawing coil body comprises a fixed ring and an auxiliary ring integrally provided with the fixed ring, the fixed ring and the auxiliary ring have the same inner diameter, and the outer diameter of the auxiliary ring is greater than the outer diameter of the fixed ring.
[0025] The coil body is provided as a fixed ring and the auxiliary ring is provided as an embodiment of the coil body, the fixed ring and the auxiliary ring are provided as a whole, wherein the fixed ring and the auxiliary ring have the same inner diameter and different outer diameters, and the outer diameter of the auxiliary ring is larger than the outer diameter of the fixed ring. The provision of the auxiliary ring allows the hand to better hold the coil body when the coil tool is manually installed, facilitating the adjustment of the position of the coil body, thereby speeding up the adjustment of the position of the coil body.
[0026] Preferably, a fastening groove is provided on the fixing ring.
[0027] In order to better fix the coil body configured as a fixed ring and an auxiliary ring on the outside of the pipe, a fastening groove can be opened on the fixed ring so that the fastening groove is grooved in a thinner position area, which can reduce production costs.
[0028] Through the above technical solution, the wire drawing tool of the present application has the following beneficial effects:
[0029] First, the structure is simple, the installation and disassembly is quick, and the practicability is strong;
[0030] Second, the positioning point of the coil drawing tool can be quickly located, which improves the fixing efficiency of the position of the coil drawing tool;
[0031] Third, the coils are in one plane, which can reduce the grinding time of the bevel cut, thereby improving the efficiency of making the bevel cut;
[0032] Fourth, the accuracy of bevel cut marking is improved, and the accuracy and compliance of bevel cuts are improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0033] Figure 1 It is a schematic diagram of the structure in which the marking coil is sleeved on the prefabricated pipe;
[0034] Figure 2 It is a side view schematic diagram of the structure in which the line coil is sleeved on the prefabricated pipe;
[0035] Figure 3 is a side view of the first embodiment of the drawing coil;
[0036] Figure 4 is a side view of the structure of the second embodiment of the drawn coil;
[0037] Figure 5 is a schematic diagram of the cross-sectional structure of the second embodiment of the drawn coil;
[0038] Figure 6 It is a structural diagram of the prefabricated pipeline and the in-service pipeline.
[0039] Description of Reference Numerals
[0040] 1. Wire drawing tool; 11. Wire drawing body; 111. Fixing ring; 112. Auxiliary ring; 12. Fastener; 121. Upper thread opening; 122. Lower thread opening; 123. Right thread opening; 124. Left thread opening; 2. Pipeline; 21. Sharp tip; 22. Bevel opening; 23. Slope opening; 3. In-service pipeline; DETAILED DESCRIPTION
[0041] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.
[0042] In the present utility model, unless otherwise specified, directional words such as "up, down, left, right, inside, outside, far, near, front" generally refer to the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and therefore cannot be understood as limitations on the present utility model.
[0043] like Figure 1 , Figure 2 , Figure 3 A pipe coiling tool is shown, which is used for coiling a pipe 2, including a coiling body 11 of a cylindrical structure, and a fastener 12 detachably connected to the coiling body 11. The coiling body 11 is sleeved on the outside of the pipe 2, and the fastener 12 abuts against the pipe 2. The inner diameter of the coiling body 11 is 10 to 30 mm larger than the outer diameter of the pipe 2, and the thickness of the coiling body 11 is 20 to 60 mm.
[0044] In the pipeline maintenance work, it is usually necessary to cut off the problematic pipeline section on the in-service pipeline 3 and replace it with a new short section prefabricated pipeline 2. During the cutting process of the in-service pipeline 3, due to the influence of the pipeline's own stress, the end face of the in-service pipeline 3 after cutting will form a non-rectangular cut state, but an oblique cut state, such as Figure 6 In order to better connect with the in-service pipeline 3 with an oblique cut, the short section prefabricated pipeline 2 also needs to be cut into an oblique cut end face to match the cut end face of the in-service pipeline 3, as shown in FIG. Figure 6 The wire marking tool 1 of the present application is used to cut the short section prefabricated pipe 2 with a straight cut into oblique cut end faces whose two end faces can accurately match the in-service pipe 3, so as to better realize the assembly welding of the short section prefabricated pipe 2 and the in-service pipe 3 and complete the repair of the in-service pipe.
[0045] The method for determining the position and using the circle drawing tool 1 is as follows:
[0046] First, draw four equal parts marking lines; use a level ruler and a ruler to perform manual measurement, and draw clear four equal parts (horizontal and vertical) marking lines at the upstream and downstream pipeline ports of the in-service pipeline 3 and the port position of the short-section prefabricated pipeline 2, respectively. At the same time, use a straight-mouthed ring tape to circle a circle of straight-mouthed lines at the appropriate position upstream (or downstream) of the in-service pipeline 3, and mark the intersection with the four equal parts lines;
[0047] Second, measure the deviation angle and tip length of the bevel cut of the in-service pipeline 3; use existing tools to measure the distance from the intersection to the horizontal extension point of the pipeline end, the difference between the upper and lower dimension values is the length that needs to be cut and removed, that is, the tip length 21, and the length of the tip length 21 is L; the difference between the left and right dimension values is the deviation value, and at the same time, it can be calculated based on the measured data whether the pipeline bevel meets the standard requirements (if it does not meet the standard requirements, the end face needs to be polished again), and according to the upper and lower, left and right value differences, the precise positions of the corresponding four cutting positioning points can be determined on the short section prefabricated pipeline 2;
[0048] Third, mark the cutting positioning points and lines; take the straight line of the end face of the short section prefabricated pipe 2 as the basic center of the marking, mark half of the upper and lower and left and right deviation size values according to the aforementioned tip length 21 and the weld gap length required by the weld standard, mark a mark point at one half of the front of one end, and mark a mark point at one half of the back of one end, so that four cutting line positioning points are marked on the four-equal-section line, and then the coil marking tool 1 of the present application is put on the outside of the pipe 2, around the pipe 2 at the four-equal-section line position and match the four cutting line positioning points, and then use the fastener 12 to fix the coil marking tool 1 on the outside of the pipe, and then use a steel knife to mark a complete cutting line in accordance with the coil marking tool 1, that is, the first oblique marking is completed;
[0049] Fourth, draw the cutting line of the second bevel; according to the length of the prefabricated short section pipe 2 (according to the welding working conditions, it is necessary to calculate the angle length of the upper bevel 23 and the size of the weld gap. The angle between the bevel 23 and the bevel 23 is 60°, and the weld gap is required to be 3-4mm. Figure 6 As shown, starting from the first bevel cutting positioning point, measure the position of the second cutting opening in the direction of the other end of the pipe opening, mark the cutting positioning point, and then use the circle marking tool 1 to mark the second bevel marking;
[0050] Fifth, bevel cutting: Use a flame cutting machine to manually adjust the cutting nozzle position, cut along the marked cutting line, and complete the bevel cutting of the pipe.
[0051] A pipe coiling tool is used for coiling a pipe 2, comprising a coiling body 11 of a cylindrical structure and a fastener 12 detachably connected to the coiling body 11. The coiling body 11 is sleeved on the outside of the pipe 2, and the fastener 12 abuts against the pipe 2. The inner diameter of the coiling body 11 is 10 to 30 mm larger than the outer diameter of the pipe 2, and the thickness of the coiling body 11 is 20 to 60 mm.
[0052] like Figure 1 , 2 As shown, the pipe coiling tool 1 is sleeved on the outside of the pipe 2. In order to cut the end of the pipe 2 into an inclined cut in a plane, a coil is drawn on the outer wall of the pipe 2 in advance, and then the cutting device is used to cut according to the drawn coil. The coiling tool 1 is composed of a cylindrical coiling body 11 and a fastener 12 that is detachably connected to the coiling body 11. The fastener 12 is fixed to the outside of the pipe by abutting against the outer wall of the pipe 2 and connecting with the coiling body 11, and is convenient to disassemble after use.
[0053] After the coil body 11 is adjusted to the desired position, it is fixed with the fastener 12, or the fixing and adjusting positions can be performed together. After the coil body 11 is fixed at the desired position, a steel knife is used to draw a coil on the outer wall of the pipe 2 in accordance with the outer edge of the coil body 11. After the coil is drawn, the coil tool 1 can be disassembled and taken out.
[0054] The inner diameter of the coil body 11 is 10 to 30 mm larger than the outer diameter of the pipe 2. This setting allows the coil body 11 to be easily put on the outside of the pipe 2. The tilt angle of the coil body 11 can meet the working conditions. At the same time, it is also beneficial for the steel knife to draw the coil smoothly along the edge of the coil body 11; the thickness of the coil body 11 is set to 20 to 60 mm, so that the stability of the coil body 11 is better, and it will not deform itself during the marking process. It is also beneficial for the steel knife to draw the coil more quickly than the coil body 11, so that the coil finally drawn by the coil drawing tool 1 can meet the working conditions.
[0055] It should be noted that the material of the coil body 11 can be carbon steel, stainless steel, aluminum-titanium alloy and the like. The alloy material can be lighter and more convenient during movement.
[0056] Furthermore, the width of the coil body 11 is 20 to 60 mm.
[0057] In order to further improve the stability of the coil marking tool 1 during marking, the width of the coil marking body 11 is set to 20-60 mm.
[0058] It should be noted that when the coil marking tool 1 is used to mark the bevel of the pipe 2, the angle of inclination between the coil marking body 11 and the pipe 2 is θ, θ≤4°. According to the relevant requirements of standards and specifications such as GB50369-2014 and SY / T7033-2016, the inclination angle of the connection of the new pipe section is required to be ≤3°. In order to meet the operating standards, the inclination angle between the coil marking tool 1 and the pipe needs to be set to θ≤4°, such as Figure 2 shown.
[0059] Furthermore, fastening grooves are provided on the coil body 11, and there are multiple groups of fastening grooves, which are matched and connected with fasteners.
[0060] A fastening groove is provided on the coil body 11, and the fastener 12 is connected to the coil body 11 through the fastening groove, which is an embodiment of connecting the coil body 11 and the fastener 12. In order to stably connect the coil body 11 to the pipe 2, multiple groups of fastening grooves can be provided, and multiple groups of fasteners 12 that are matched with the fastening grooves can be matched, so that the coil body 11 can be fixed at multiple points.
[0061] Furthermore, the number of fastening grooves is four, and the four fastening grooves are concentrically arranged and evenly distributed.
[0062] The fastening grooves are provided with four as a preferred embodiment of the fastening grooves, and the four fastening grooves match four sets of fasteners 12, such as Figure 1 As shown, the fastening grooves are respectively arranged as an upper thread opening 121, a lower thread opening 122, a right thread opening 123, and a left thread opening 124. The four groups of fastening grooves are concentrically arranged and evenly distributed, so that the four fastening grooves are distributed at the top, bottom, left, and right of the coil body 11.
[0063] Furthermore, the fastener 12 is configured as a glass ball screw, and the fastening groove is configured as a threaded hole that cooperates with the glass ball screw.
[0064] In order to simplify the structure of the fastener 12 and improve the stability of the connection between the coil body 11 and the pipe 2, the fastener 12 can be set as a glass bead screw, and the fastening groove can be set as an internal threaded hole that matches the glass bead screw structure. This makes the installation and removal of the coil tool 1 easy and fast. At the same time, the part where the glass bead screw abuts against the pipe 2 is bead-shaped, so that the connection between a single glass bead screw and the outer wall of the pipe 2 is a point connection, and the connection between multiple groups of glass bead screws and the outer wall of the pipe 2 is a circular arc connection, thereby improving the stability of the connection between the coil body 11 and the outside of the pipe 2.
[0065] Specifically, in actual working conditions, the positions of the left thread 124, the right thread 123 and their corresponding fasteners 12 are usually determined first, and then the positions of the upper thread 121, the lower thread 122 and their corresponding fasteners 12 are determined, and finally the coil body 11 is stably fixed on the outer wall of the pipe 2.
[0066] Furthermore, the coil body 11 includes a fixed ring 111 and an auxiliary ring 112 integrally provided with the fixed ring 111 . The inner diameters of the fixed ring 111 and the auxiliary ring 112 are the same, and the outer diameter of the auxiliary ring 112 is greater than the outer diameter of the fixed ring 111 .
[0067] The coil body 11 is provided with a fixed ring 111 and an auxiliary ring 112 as an embodiment of the coil body 11 structure. The fixed ring 111 and the auxiliary ring 112 are provided integrally, wherein the fixed ring 111 and the auxiliary ring 112 have the same inner diameter and different outer diameters, and the outer diameter of the auxiliary ring 112 is greater than the outer diameter of the fixed ring 111. Figure 4 , Figure 5 The auxiliary ring is provided so that when the coil marking tool 1 is manually installed, the hand can better hold the auxiliary ring 112 of the coil marking body 11, which facilitates the adjustment of the position of the coil marking body 11, thereby speeding up the adjustment of the position of the coil marking body 11.
[0068] Furthermore, a fastening groove is provided on the fixing ring 111 .
[0069] In order to better fix the coil body 11 provided with the fixing ring 111 and the auxiliary ring 112 on the outside of the pipe 2, a fastening groove can be provided on the fixing ring 111 so that the fastening groove is provided in a thinner position area, which can reduce the production cost. Figure 5 shown.
[0070] In the process of hot-joining operation of Φ660 and Φ1016mm pipelines, the wire marking tool 1 of the present application has been put into practical application and verified many times, and the use effect is good, which significantly reduces the marking error, improves the marking accuracy, shortens the marking time of the pipe worker, and improves the work efficiency. In particular, the production quality of the bevel of the pipeline 2 has been greatly improved, which greatly reduces the labor intensity of grinding the groove 23, ensures the gap accuracy of the pipe mouth assembly, provides a strong guarantee for the welding quality, and effectively shortens the time of hot-joining operation. The wire marking tool 1 can also be used for pipelines 2 of different diameters to make wire marking tools 1 for various pipeline 2 specifications.
[0071] The use of the scribing coil tool 1 of the present application for scribing a large-diameter pipe 2 is highly practical, simple to install, easy to operate, and has low material processing price. It overcomes the technical problem that the prior art uses a narrow coil to scribing the outer wall of the pipe, and multiple points are not in the same plane, resulting in poor straightness of the cut pipe end face, which cannot meet the assembly requirements in the welding process specification.
[0072] The following table is a comparison table of various parameters required in the process of beveling two pipes 2 of Φ660 and Φ1016 mm, respectively using the wire marking tool 1 of the present application and the existing narrow wire band tool to mark and bevel two pipes 2 of two diameters, and completing the bevel production process:
[0073]
[0074] As can be seen from the above table, compared with the narrow loop tool of the prior art, the wire drawing tool 1 of the present application reduces the number of manpower required for the operation, and can be completed by a single worker. The time to complete the wire drawing is significantly shortened, which greatly improves the speed of wire drawing. At the same time, in the process of welding the bevels, in addition to considering the weld gap, there is no need to consider the amount of extra uneven gaps. The grinding time after the bevel is cut is also greatly shortened, which improves the overall production efficiency of the bevel. When marking with the wire drawing tool 1 of the present application, the errors in cutting positioning can be detected during the positioning and installation process of the wire drawing tool 1, so that the staff can make timely adjustments to the cutting positioning points, and the final completed bevel is relatively flat.
[0075] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.
[0076] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.
Claims
1. A pipe marking tool, used for marking a pipe (2), characterized in that: The invention comprises a coil body (11) of a cylindrical structure and a fastener (12) detachably connected to the coil body (11); the coil body (11) is sleeved on the outside of a pipe (2); the fastener (12) abuts against the pipe (2); the inner diameter of the coil body (11) is 10 to 30 mm larger than the outer diameter of the pipe (2); and the thickness of the coil body (11) is 20 to 60 mm.
2. The pipe marking tool according to claim 1, characterized in that: The width of the scribing coil body (11) is 20 to 60 mm.
3. The pipe marking tool according to claim 1, characterized in that: The scribing coil body (11) is provided with fastening grooves, and the fastening grooves are provided in multiple groups. The fastening grooves are matched and connected with the fasteners.
4. The pipe marking tool according to claim 3, characterized in that: The number of the fastening grooves is four, and the four fastening grooves are concentrically arranged and evenly distributed.
5. The pipe marking tool according to claim 4, characterized in that: The fastener (12) is configured as a glass ball screw, and the fastening groove is configured as a threaded hole that cooperates with the glass ball screw.
6. The pipe marking tool according to claim 5, characterized in that: The marking coil body (11) comprises a fixed ring (111) and an auxiliary ring (112) integrally arranged with the fixed ring (111); the fixed ring (111) and the auxiliary ring (112) have the same inner diameter, and the outer diameter of the auxiliary ring (112) is greater than the outer diameter of the fixed ring (111).
7. The pipe marking tool according to claim 6, characterized in that: The fixing ring (111) is provided with the fastening groove.