Welding scribing device for pipes with different diameters
The welding scribing device, which combines a sheath and a positioning magnetic rod, solves the problems of low welding efficiency and unstable joint quality for pipes of unequal diameters, achieving efficient and accurate welding joint fabrication and reducing labor costs.
Patent Information
- Application Number
- CN202422784872.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-14
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-11-14
AI Technical Summary
In existing technologies, welding pipes of unequal diameters is inefficient, results in unstable joint quality, and incurs high labor costs. The lack of specialized tools also leads to significant errors in manual operation.
A welding marking device including a sheath and multiple positioning magnetic rods was designed. The sheath tightly covers the outer surface of the branch pipe, and the positioning magnetic rods are magnetically attracted to the pipe and move along the axial direction to draw the outline of the welding interface with the marking pen.
It improves the accuracy and efficiency of welding pipes of unequal diameters, reduces errors and costs associated with manual operation, and is suitable for non-batch, scattered, or small-volume pipe joint fabrication, ensuring precise alignment and secure connection of welded joints.
Smart Images
Figure CN223507172U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining technology, specifically, to a welding scribing device for pipes of unequal diameters. Background Technology
[0002] To meet the welding process requirements between pipes of different specifications, corresponding welding joints need to be made on the two pipes. In actual welding operations, according to the connection relationship between the pipes, an intersection line needs to be drawn at the connection point of the pipes, and the excess material enclosed by the intersection line needs to be removed. Then, the pipes to be connected are moved to the opening of the intersection line, and the two pipes of different specifications are welded firmly along the intersection line.
[0003] Currently, for the fabrication of welded joints between pipes of different specifications, if it is for mass production, it is usually done by purchasing professional equipment. However, for daily sporadic or small-scale joint fabrication, there are no special tools for drawing the intersection lines between pipes. Generally, it is necessary for welders to manually cut the joints based on their experience. Since the surface of the pipe is curved, it is difficult to control manually, resulting in large errors in the fabricated joints. Sometimes, it is even necessary to cut repeatedly to complete the joints. This not only results in low welding efficiency and poor welded joint quality but also increases labor costs.
[0004] Therefore, there is an urgent need to develop an accurate and easy-to-operate marking device for welding pipes of unequal diameters. Utility Model Content
[0005] This invention provides a welding marking device for pipes of unequal diameters, which at least solves the problems of low efficiency, unstable joint quality and high labor costs in the existing welding of pipes of unequal diameters.
[0006] To achieve the above objectives, this utility model provides a welding marking device for pipes of unequal diameters, wherein the pipes of unequal diameters include a main pipe and branch pipes, the axis of the main pipe and the axis of the branch pipe forming an angle, characterized in that the welding marking device includes:
[0007] A sleeve having several through holes spaced at equal intervals is used to tightly cover the outer surface of the branch pipe.
[0008] Multiple positioning magnetic rods are movably inserted into the through holes of the sleeve along the axial direction of the branch pipe and are tightly fitted to the outer surface of the branch pipe; each positioning magnetic rod has a positioning end, which is used to abut against the outer surface of the mother pipe and form a contact point, and each contact point is a pre-welding point.
[0009] A marking pen is used to connect multiple pre-welded points to form the outline of the welding interface.
[0010] Furthermore, each of the positioning magnetic rods can move axially within its corresponding through hole.
[0011] Furthermore, the positioning end of the positioning magnetic rod is tapered.
[0012] Furthermore, the end face of the tail end of the positioning magnetic rod is a circular plane.
[0013] Furthermore, all of the plurality of positioning magnetic rods are of equal length.
[0014] Furthermore, the length of the sleeve and the corresponding number of the positioning magnetic rods can be adjusted.
[0015] Furthermore, the sheath is made of a non-magnetic flexible material.
[0016] Furthermore, the non-magnetic flexible material is a plastic with a thickness of 0.2 mm.
[0017] Compared with the prior art, the advantages and positive effects of this utility model are as follows:
[0018] This invention provides a simple, easy-to-operate welding marking device for pipes of unequal diameters, designed to improve welding accuracy. It aims to enhance the efficiency and quality of welding operations on pipes of unequal diameters, while reducing reliance on highly skilled workers and minimizing errors and costs associated with manual operation. This device is particularly suitable for non-batch, daily, or small-volume pipe joint fabrication, providing welders with a quick and accurate method for marking intersection lines, thereby optimizing pre-welding preparation and ensuring precise and secure connection of the weld joints.
[0019] This invention utilizes a combination of a flexible sheath and multiple positioning magnetic rods to automatically adhere to the outer wall of a pipe, eliminating the need for additional fixing or clamping devices and providing a stable and secure fixation method. The operator can move the positioning magnetic rod axially along the through-hole within the sheath by pushing its tail end. This movement ensures that the positioning end of the magnetic rod accurately contacts the predetermined welding point on the pipe. When the positioning end of the magnetic rod contacts the pipe surface, lines can be scribed along these points, forming a continuous weld interface outline. These outlines provide precise guidance for subsequent welding work. The use of this device simplifies the scriber process, reduces preparation time, and improves overall work efficiency. Simultaneously, the improved scriber accuracy reduces errors and rework during the welding process. This welding scriber device can adapt to welding at different angles between main pipes and branch pipes, and is not limited to vertical welding; it is also suitable for welding tasks at oblique or complex angles.
[0020] In addition, the design of the sheath and positioning magnetic rod allows the device to adapt to pipes of different sizes and specifications, increasing the device's versatility and practicality. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of pipes with unequal diameters being joined together.
[0022] Figure 2 Example diagram for welding joints of pipes with unequal diameters;
[0023] Figure 3 This is a front view of the structure of the welding marking device for pipes of unequal diameters according to this utility model;
[0024] Figure 4 This is a top view of the structure of the welding marking device for pipes of unequal diameters according to this utility model;
[0025] Figure 5 This is a schematic diagram of the operation of the welding marking device for pipes of unequal diameters in Embodiment 1 of this utility model;
[0026] Figure 6 This is a schematic diagram of the welding interface in Embodiment 1 of this utility model;
[0027] Figure 7 This is a schematic diagram of the operation of the welding marking device for pipes of unequal diameters in Embodiment 2 of this utility model.
[0028] In the above image:
[0029] 1. Sheath; 11. Through hole; 2. Positioning magnetic rod; 21. Positioning end; 22. Tail end; 3. Main tube; 4. Branch tube; 5. Welding interface outline. Detailed Implementation
[0030] 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.
[0031] In the description of this application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "level," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0033] In daily welding work, to meet the process requirements of welding pipes of different specifications, it is necessary to create corresponding welding joints on the two pipes. Figures 1-2 For example, when welding a smaller diameter pipe as a branch pipe to a larger diameter pipe (the main pipe), corresponding joints need to be made on both pipes. Specifically, an intersection line needs to be drawn at the joint, and the excess material enclosed by the intersection line needs to be removed. Then, the pipes to be connected are moved to the opening of the intersection line, and the two pipes of different specifications are welded firmly along the intersection line. Furthermore, there are other welding marking requirements, such as welding a smaller diameter pipe as the main pipe and oblique welding. Therefore, there is an urgent need to provide an accurate and easy-to-operate welding marking device for pipes of unequal diameters.
[0034] This invention provides a welding marking device for pipes of unequal diameters, so as to achieve efficient and accurate welding marking between pipes of unequal diameters.
[0035] Example 1:
[0036] This utility model provides a welding marking device for pipes of unequal diameters, comprising: a sheath 1, multiple positioning magnetic rods 2, and a marking pen. The pipes of unequal diameters include pipes of different diameters as a main pipe 3 and branch pipes 4. The axis of the main pipe 3 and the axis of the branch pipe 4 form an angle, which can be adjusted according to welding requirements. The following describes the device in conjunction with... Figures 3-7 The welding marking device for pipes of unequal diameters and the structure of each component are described in detail.
[0037] Preferably, such as Figures 3-4 As shown, the welding marking device for pipes of unequal diameters includes:
[0038] The sleeve 1 has several through holes 11 at equal intervals on it. The sleeve 1 is used to tightly cover the outer surface of the branch pipe 4.
[0039] Multiple positioning magnetic rods 2 are movably inserted into the through holes 11 of the sleeve 1 along the axial direction of the branch pipe 4 and are tightly fitted to the outer surface of the branch pipe 4. Each positioning magnetic rod 2 has a positioning end 21, which is used to abut against the outer surface of the mother pipe 3 and form a contact point. Each contact point is a pre-welding point. Since the positioning magnetic rod 2 is magnetic, the welding marking device can be automatically adsorbed onto the outer wall of the branch pipe 4 by cooperating with the sleeve 1. No additional fixing or clamping device is required to ensure its stability and prevent it from falling off. The positioning magnetic rod 2 can also remain relatively stable when it moves axially in the through holes 11 of the sleeve 1.
[0040] A marking pen is used to connect multiple pre-welded points into a weld interface outline 5. In some embodiments, the marking pen may be a talcum powder pen.
[0041] Preferably, each positioning magnetic rod 2 can move axially within its corresponding through hole 11.
[0042] Preferably, the positioning end 21 of the positioning magnetic rod 2 is tapered. The tapered positioning end 21 can make point contact with the mother tube 3, effectively reducing the error during scribing and improving the accuracy of scribing.
[0043] Preferably, the end face of the tail end 22 of the positioning magnetic rod 2 is a circular plane. The circular plane end face makes it easier for the operator to push with their hand or a tool, making it easier and more accurate to move the positioning magnetic rod 2 on the pipe for marking.
[0044] Preferably, all positioning magnetic rods 2 are of equal length. The uniformity and coordination of the device are ensured by the consistent length of all positioning magnetic rods 2. Furthermore, the equal length facilitates standardized production, reduces the complexity of the manufacturing process, and also simplifies inventory management and maintenance / replacement. During marking operations, the equal length of the magnetic rods eliminates concerns for operators about positioning differences caused by variations in rod length, simplifying the operation process and helping to ensure consistency and accuracy during marking.
[0045] Preferably, the length of the sheath 1 and the number of corresponding positioning magnetic rods 2 are adjustable. By adjusting the length of the sheath 1 and the number of positioning magnetic rods 2, the device can adapt to pipes of different diameters and lengths, increasing its application range. The sheath 1 and magnetic rods can be flexibly adjusted according to specific welding requirements to adapt to different welding scenarios and pipe specifications.
[0046] Preferably, the sheath 1 is made of a non-magnetic, flexible material. The non-magnetic sheath 1 does not interfere with the magnetism of the positioning magnetic rod 2, ensuring that the magnetic rod can stably adhere to the pipe while allowing axial movement along the axis of the branch pipe 4 without affecting the marking accuracy. The flexible sheath 1 can be easily bent, unfolded, and shaped to adapt to pipes of different diameters and shapes, providing a wider range of applications.
[0047] Preferably, the non-magnetic flexible material is a plastic with a thickness of 0.2 mm.
[0048] Figure 5 A schematic diagram of the welding marking operation for larger diameter pipes as the mother pipe is shown below. Figure 5 Taking this example, the operation method of the welding marking device for pipes of unequal diameters according to this utility model in this embodiment will be described in detail.
[0049] like Figure 5 As shown, when the welding requirement is to weld a smaller diameter pipe (branch pipe 4) onto a larger diameter pipe (main pipe 3), firstly, adjust the length of the sleeve 1 to match the outer circumference of the branch pipe 4, and insert multiple positioning magnetic rods 2 into the through holes 11 of the sleeve 1 to complete the assembly of the welding marking device. The welding marking device is then placed around the branch pipe 4. Because the positioning magnetic rods 2 are entirely magnetic, the assembled welding marking device will automatically adhere to the outer wall of the branch pipe 4 without the need for additional fixing or clamping devices, ensuring its stability and preventing it from easily falling off. The axial angle and relative position between the branch pipe 4 and the main pipe 3 are then adjusted to... Figure 5 For example, ensure that the axis of branch pipe 4 is perpendicular to the axis of main pipe 3. Push the tail ends 22 of multiple positioning magnetic rods 2, and the multiple positioning magnetic rods 2 move axially along the axis of branch pipe 4 in their corresponding through holes 11 until the positioning end 21 of each positioning magnetic rod 2 touches the outer wall of main pipe 3. The point where the positioning end 21 touches the outer wall of main pipe 3 is the pre-welding point. Use a scribing pen such as a steatite pen to smoothly connect the multiple pre-welding points on the outer wall of main pipe 3 in sequence to complete the drawing of the welding interface outline 5.
[0050] like Figure 6 As shown, after completing the drawing of the welding interface outline 5, the welding scribing device is removed, and the welding interface outline 5 drawn on the mother tube 3 is cut. The excess material enclosed by the welding interface outline 5 is removed, and the cut edges are deburred and polished, thereby completing the welding interface fabrication that meets the welding process requirements.
[0051] Example 2:
[0052] like Figure 7 As shown, when the welding requirement is to weld a larger diameter pipe (branch pipe 4) onto a smaller diameter pipe (main pipe 3), firstly, adjust the length of the sleeve 1 to match the outer circumference of the branch pipe 4. Alternatively, the length of the sleeve 1 can be adjusted to match the arc length of the outer wall of the area to be welded, depending on the welding requirements. Then, insert multiple positioning magnetic rods 2 into the through holes 11 of the sleeve 1 to complete the assembly of the welding marking device. The welding marking device is then placed around the branch pipe 4. Because the positioning magnetic rods 2 are entirely magnetic, the assembled welding marking device will automatically adhere to the outer wall of the branch pipe 4 without the need for additional fixing or clamping devices, ensuring its stability and preventing it from easily falling off. Adjust the axial angle and relative position between the branch pipe 4 and the main pipe 3 to... Figure 7 For example, according to the welding requirements, only a portion of the branch pipe 4 needs to be welded to the mother pipe 3. Simple markings are made to confirm the welding area to adjust the relative position of the branch pipe 4 and the mother pipe 3, ensuring that the axis of the branch pipe 4 remains perpendicular to the axis of the mother pipe 3. The tail ends 22 of multiple positioning magnetic rods 2 are pushed, and each positioning magnetic rod 2 moves axially along the axis of the branch pipe 4 within its corresponding through hole 11 until the positioning end 21 of each positioning magnetic rod 2 in the welding area, i.e., the overlapping part of the branch pipe 4 and the mother pipe 3, touches the outer wall of the mother pipe 3 and stops. The point where the positioning end 21 touches the outer wall of the mother pipe 3 is the pre-welding point. Using a scribing pen such as a steatite pen, the multiple pre-welding points on the outer wall of the mother pipe 3 are smoothly connected sequentially to complete the drawing of the welding interface outline 5.
[0053] After completing the drawing of the welding interface outline 5, the steps are the same as in Example 1. When performing other welding scenarios or welding requirements, the above method can be used to complete the drawing of the welding interface outline 5.
[0054] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.
Claims
1. A welding marking device for pipes of unequal diameters, the pipes comprising a main pipe and branch pipes, wherein the axis of the main pipe forms an angle with the axis of the branch pipe, characterized in that, The welding marking device includes: A sleeve having several through holes spaced at equal intervals is used to tightly cover the outer surface of the branch pipe. Multiple positioning magnetic rods are movably inserted into the through holes of the sleeve along the axial direction of the branch pipe and are tightly fitted to the outer surface of the branch pipe; each positioning magnetic rod has a positioning end, which is used to abut against the outer surface of the mother pipe and form a contact point, and each contact point is a pre-welding point. A marking pen is used to connect multiple pre-welded points to form the outline of the welding interface.
2. The welding marking device for pipes of unequal diameters according to claim 1, characterized in that, Each of the positioning magnetic rods can move axially within its corresponding through hole.
3. The welding marking device for pipes of unequal diameters according to claim 1, characterized in that, The positioning end of the positioning magnetic rod is tapered.
4. The welding marking device for pipes of unequal diameters according to claim 1, characterized in that, The end face of the positioning magnetic rod is a circular plane.
5. The welding marking device for pipes of unequal diameters according to claim 1, characterized in that, The multiple positioning magnetic rods are all of equal length.
6. The welding marking device for pipes of unequal diameters according to claim 1, characterized in that, The length of the sleeve and the corresponding number of positioning magnetic rods are adjustable.
7. The welding marking device for pipes of unequal diameters according to claim 1, characterized in that, The sheath is made of a non-magnetic, flexible material.
8. The welding marking device for pipes of unequal diameters according to claim 7, characterized in that, The non-magnetic flexible material is a plastic with a thickness of 0.2 mm.