Pipeline cutting line drawing tool
By designing a pipe-cutting and marking tool, and utilizing rolling bearings and a multi-stage adjustment structure, the problem of inaccurate marking on cardboard was solved, achieving precision and stability in pipe cutting, and improving assembly efficiency and quality.
Patent Information
- Application Number
- CN202520327440.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-27
AI Technical Summary
In the existing technology, the method of marking lines around the pipe with cardboard leads to inaccurate pipe cutting, resulting in uneven joints and large gaps during assembly, which affects the quality and stability of the pipe system.
A pipe-cutting marking tool was designed, comprising a base plate, support rod, sliding assembly, fixing assembly, and clamp. It utilizes rolling bearings and a multi-stage adjustment structure to ensure the accuracy and stability of the marking.
It improves the accuracy of line drawing, reduces gaps during assembly, and increases work efficiency and the overall quality of the piping system.
Smart Images

Figure CN223820533U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of pipeline marking, more particularly to a cutting pipeline marking tool. BACKGROUND
[0002] In construction sites, pipelines are widely used, covering various materials and specifications. These pipelines often need to be cut in a ring shape to meet specific installation or connection requirements. In order to ensure that the cut pipeline is smooth and the butt joint quality is good during subsequent assembly, accurate marking on the pipeline surface is usually required.
[0003] There are various circular pipe marking tools on the market, but most of them use the method of wrapping paper around the pipeline to mark the line. Although this method is simple to operate, it has obvious defects. Because the paperboard is soft, it is easy to deform during marking, resulting in inaccurate lines. In addition, the friction between the paperboard and the pipeline also affects the accuracy of the marking, which may cause uneven butt joint and large gap during the assembly of the cut pipeline, thereby affecting the overall quality and stability of the pipeline system.
[0004] In order to solve the above problems, the industry has been exploring more accurate and efficient circular pipe marking tools. The present technology is born in this background, aiming to provide a circular pipe surface marking tool with simple structure, convenient operation and high marking accuracy. Through the implementation of the present technology, the accuracy of marking can be significantly improved, the gap of butt joint during assembly can be reduced, thereby reducing the workload and improving the work efficiency. CONTENT OF THE INVENTION
[0005] Based on the above problems, the present application provides a cutting pipeline marking tool to solve the technical problem that most paperboard is used to wrap the pipeline to mark the line, which may cause uneven butt joint and large gap during the assembly of the circular pipe, resulting in poor butt joint quality of the circular pipe.
[0006] To solve the above technical problems, the technical solution adopted by the present application is:
[0007] A cutting pipeline marking tool, comprising a base plate, a support rod mounted on the base plate, a sliding assembly for realizing the up-down displacement of a marking pen mounted on the support rod, a sliding rod connected with the sliding assembly, a fixing assembly mounted on the sliding rod, and a clamp mounted on the fixing assembly.
[0008] A placing table for placing the pipeline is mounted on the base plate, the placing table comprises a first screw rod fixedly connected with the base plate, a rolling bearing is arranged on the first screw rod, and a nut for fixing the rolling bearing is arranged on the first screw rod.
[0009] In one specific implementation, the base plate and the support rod are connected by angle iron.
[0010] In one specific implementation, the width of the end of the base plate closest to the support rod is smaller than the width of the side furthest from the support rod.
[0011] In one specific implementation, the sliding assembly includes a sliding sleeve slidably connected to the support rod, the sliding sleeve being provided with a fixing screw for fixing the sliding sleeve to the support rod, the fixing screw being threadedly connected to the sliding sleeve.
[0012] In one specific implementation, the fixing component includes a sleeve slidably connected to the slide bar, the sleeve being provided with a second screw for fixing the sleeve to the slide bar.
[0013] In one specific implementation, the clamp includes a pen holder for mounting a paintbrush, the pen holder being fixedly connected to the sleeve, and the pen holder being provided with a third screw for fixing the paintbrush.
[0014] In one specific implementation, the first screw is provided at each of the four corners of the base plate, and each screw is provided with two nuts, with the rolling bearing located between the two nuts.
[0015] The positive effects of this utility model are:
[0016] The base plate and support structure provide a stable foundation, while the support rods are securely connected to the base plate via angle iron and other structures, ensuring the stability of the entire drawing tool.
[0017] Sliding and fixed components: the sliding component (such as a sliding sleeve) allows for flexible height adjustment on the support rod and locks the position by a fixing screw; the fixed component (such as a sleeve) allows sliding on the sliding rod and locks the position by a second screw, thereby achieving adaptability to pipes of different diameters.
[0018] The fixture design includes a pen holder and a third screw to fix the pen, ensuring the stability and accuracy of the pen during the drawing process.
[0019] The placement platform is designed to be mounted on the base plate via a first screw and rolling bearings. The rolling bearings reduce friction between the pipe and the base plate, allowing the pipe to rotate easily and facilitating line drawing operations.
[0020] Nuts are used to secure rolling bearings, preventing them from moving during the drawing process and ensuring the accuracy of the lines. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0022] Fig. 1 This is a schematic diagram of the structure of this utility model;
[0023] Fig. 2 This is a schematic diagram of the structure of the fixing component and the clamp of this utility model.
[0024] Fig. 3 This is a schematic diagram of the structure of the first screw and the rolling bearing of this utility model.
[0025] Explanation of reference numerals in the attached figures
[0026] 1. Base plate; 2. Support rod; 3. Sliding rod; 5. First screw; 6. Rolling bearing; 7. Nut; 8. Angle iron; 9. Sliding sleeve; 10. Fixing screw; 11. Sleeve; 12. Second screw; 13. Pen holder; 14. Third screw. Detailed Implementation
[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0028] Example
[0029] like Figs. 1-3 As shown, a base plate 1 is placed horizontally on a workbench. The base plate 1 is made of rectangular steel plate. A placement platform for placing pipes is installed on the base plate 1. The placement platform includes a first screw 5 fixedly connected to the base plate 1, with one first screw 5 welded to each of its four corners. Two nuts 7 are installed on each first screw 5, and a rolling bearing 6 is clamped between the two nuts 7. The position of the rolling bearing 6 is fixed by tightening the nuts 7. Fig. 3 ).
[0030] The support rod 2 is vertically welded to one side of the base plate 1 via angle iron 8. The side of the base plate 1 closest to the support rod 2 is designed to be narrower, while the side furthest from the support rod 2 is wider, to enhance stability. A sliding assembly for realizing the vertical movement of the brush is mounted on the support rod 2, the sliding assembly including a sliding sleeve 9 slidably mounted between the support rod 2 and the brush.
[0031] The sliding sleeve 9 is fitted onto the support rod 2. The height of the sliding sleeve 9 on the support rod 2 is adjusted by the fixing screw 10 passing through the sliding sleeve 9, and the fixing screw 10 is tightened to lock the position. The sliding rod 3 is welded to the sliding sleeve 9 to form a sliding assembly that can be vertically raised and lowered.
[0032] Sleeve 11 is fitted onto slide rod 3, and the horizontal position of sleeve 11 on slide rod 3 is adjusted by second screw 12. Fig. 2 After adjustment, tighten the second screw 12 to fix the sleeve 11. The fixture includes a pen holder (13) for mounting a pen. The pen holder 13 is welded to the end of the sleeve 11. A pen (such as a marker) is inserted into the pen holder 13 and the pen is fixed by tightening the third screw 14 to ensure stable contact between the pen tip and the pipe surface during the drawing process.
[0033] Pipe placement and marking operations
[0034] The pipe to be drawn is placed horizontally on the rolling bearing 6 of the base plate 1. The rolling bearing 6 can rotate freely, reducing the frictional resistance when the pipe moves.
[0035] Based on the pipe diameter, first adjust the height of the sliding sleeve 9 on the support rod 2 so that the pen tip is aligned with the center line of the pipe surface; then move the sleeve 11 horizontally so that the pen tip fits against the pipe surface.
[0036] Tighten the fixing screw 10 and the second screw 12 to ensure that the sliding component and the fixing component are in the same position. Manually rotate the pipe one revolution and use a pen to draw a precise circular cutting line on the pipe surface.
[0037] Working principle
[0038] Rolling bearing 6 and nut 7 are matched: the rolling bearing 6 is limited by the nuts 7 at both ends, which can rotate freely and avoid axial displacement, ensuring that the pipe rotates smoothly when drawing lines.
[0039] Multi-stage adjustment design: The vertical adjustment of support rod 2 is combined with the horizontal adjustment of slide rod 3, which can be adapted to pipes of different diameters.
[0040] Modular fixing: Each component is fixed by a screw, which facilitates disassembly and maintenance and increases the service life of the tool.
[0041] Technical effect verification
[0042] Actual testing has shown that this tool can quickly and efficiently draw circular lines on pipes with a drawing error less than the workpiece requirements. The design of the rolling bearing 6 significantly reduces the pipe rotation resistance 7, greatly improving operational efficiency; the rigid fixing structure of the clamp prevents pen jitter, ensuring continuous and uniform lines.
[0043] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A tool for marking lines on pipes, characterized in that, It includes a base plate (1), a support rod (2) mounted on the base plate (1), a sliding component mounted on the support rod (2) for realizing the vertical displacement of the pen, a slide rod (3) connected to the sliding component, a fixing component mounted on the slide rod (3), and a clamp mounted on the fixing component; The base plate (1) is equipped with a placement platform for placing pipes. The placement platform includes a first screw (5) fixedly connected to the base plate (1). A rolling bearing (6) is provided on the first screw (5). A nut (7) for fixing the rolling bearing (6) is provided on the first screw (5). The sliding assembly includes a sliding sleeve (9) that is slidably connected to the support rod (2). The sliding sleeve (9) is provided with a fixing screw (10) for fixing the sliding sleeve (9) to the support rod (2). The fixing screw (10) and the sliding sleeve (9) are connected by a through thread. The fixing component includes a sleeve (11) that is slidably connected to the slide rod (3), and the sleeve (11) is provided with a second screw (12) for fixing the sleeve (11) to the slide rod (3).
2. The pipe-cutting and marking tool according to claim 1, characterized in that, The base plate (1) and the support rod (2) are connected by angle iron (8).
3. The pipe-cutting and marking tool according to claim 1, characterized in that, The width of the bottom plate (1) at the end closest to the support rod (2) is smaller than that at the end furthest from the support rod (2).
4. A pipe-cutting and marking tool according to claim 1, characterized in that, The clamp includes a pen holder (13) for mounting a paintbrush, the pen holder (13) being fixedly connected to the sleeve (11), and a third screw (14) for fixing the paintbrush being provided on the pen holder (13).
5. A pipe-cutting and marking tool according to claim 1, characterized in that, The base plate (1) is provided with the first screw (5) at each of the four corners, and each screw is provided with two nuts (7). The rolling bearing (6) is located between the two nuts (7).