Pipe welding positioning tool
By designing a pipe welding positioning fixture, components such as pipe clamps, connectors, and positioning rods are used to achieve rapid pipe centering and positioning, solving the problem that the centering accuracy of high-altitude suspended pipe welding depends on manual experience, improving welding quality and efficiency, and reducing the risks of high-altitude operations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NORTHWEST ENGINEERING CORPORATION LIMITED
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-21
AI Technical Summary
The alignment accuracy of welding suspended pipelines at high altitudes depends on human experience and is easily affected by human factors, resulting in high welding difficulty and low efficiency, especially in high-altitude operations and suspended pipeline scenarios where the alignment effect is poor.
Design a pipe welding positioning fixture, including a fixed structure and multiple positioning structures. Utilize components such as pipe clamps, connectors, positioning rods, fixing rings, and moving rods to achieve rapid pipe centering and positioning, and achieve precise positioning through threaded connections and pressure sensors.
It improves the alignment accuracy and efficiency of pipeline welding, reduces the risk of high-altitude operations, enhances welding quality and work efficiency, and controls the error within ≤0.05mm.
Smart Images
Figure CN224526392U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline welding technology, and specifically to a pipeline welding positioning fixture. Background Technology
[0002] In pipeline welding, the axial alignment accuracy directly affects the weld quality. High-altitude suspended pipelines are mainly used to transport high-temperature and high-pressure steam, fuel and hot water, etc. Welding of high-altitude operations, airspace, and suspended pipelines is highly dangerous and difficult.
[0003] Currently, welding of suspended pipelines at height is typically achieved through either hoisting or lap welding. The hoisting method works by fixing one end of the pipeline to be installed, while the other end is pulled using a hand-operated or electric hoist, causing the pipeline to move and align with existing pipelines. By adjusting the hoist's pulling force and position, the pipeline's coaxiality and height are gradually adjusted. Lap welding works by welding temporary plates (temporary plates) to both ends of the pipeline. Adjusting the position of these plates achieves initial alignment before fixing and final welding. Lap welding plates are usually made of materials such as angle steel or steel plates and are fixed to the pipeline by welding. However, both of the above methods have some problems. The alignment of pipes relies heavily on human experience and is easily affected by human factors. In particular, for the connection of suspended pipes and the continuation of existing suspended pipes, if the operator is inexperienced or has difficulty controlling the force or makes improper operation, the pipes will move unevenly, affecting the alignment accuracy. These problems will be amplified, especially in high-altitude operations, open areas, or welding scenarios of suspended pipes, ultimately affecting the alignment effect and accuracy. In addition, it is time-consuming, labor-intensive, and inefficient.
[0004] In summary, a positioning tool that facilitates pipe welding alignment is needed. Utility Model Content
[0005] To solve the above-mentioned technical problems, this utility model provides a pipe welding positioning fixture, which facilitates pipe welding centering and positioning, and improves centering accuracy and work efficiency.
[0006] The technical solution of this utility model is: A pipe welding positioning fixture, comprising: The fixed structure includes two pipe clamps and two connectors. The pipe clamps are semi-circular, and the two pipe clamps form a circle when they are joined together. The two pipe clamps are used to fit onto the side wall of an existing pipe. The two connectors are respectively located at both ends of the two pipe clamps and are used to connect the two pipe clamps. Multiple positioning structures are evenly arranged on the side walls of the two pipe clamps. Each positioning structure includes a positioning rod, a fixing ring, and a moving rod. The positioning rod is L-shaped, with one end fixed to the side wall of the pipe clamp. The fixing ring is located at the other end of the positioning rod, and the moving rod is horizontally inserted into the fixing ring. One end of the moving rod is used to perpendicularly abut against the side wall of the pipe to be installed.
[0007] Preferably, the inner ring sidewall of the fixed ring is provided with internal threads, and the moving rod is a first bolt, which is threadedly connected to the fixed ring.
[0008] Preferably, a groove is formed on the side wall of the movable rod, the groove being formed along the axial direction of the movable rod, a slider is provided on the inner wall of the fixing ring, the slider is fitted into the groove, and the slider is slidably connected to the groove, the groove having a T-shaped cross-section, and further comprising: The third bolt passes through the side wall of the fixed ring, is threaded to the fixed ring, and its end is used to abut against the side wall of the moving rod.
[0009] Preferably, the connecting member is a second bolt, and both ends of the two pipe clamps are provided with threaded holes, and the second bolt is sequentially threaded into the two threaded holes.
[0010] Preferably, the positioning rod includes a first rod and a second rod. The first rod is horizontally disposed on the side wall of the pipe clamp. One end of the second rod is fixed to the end of the first rod away from the pipe clamp. The fixing ring is disposed at the other end of the second rod. The length direction of the second rod is consistent with the axial direction of the existing pipe. A spirit level is provided on the second rod for assisting in centering.
[0011] Preferably, a pressure sensor is provided at the end of the moving rod that abuts against the side wall of the pipe to be installed, and the pressure sensor is used to detect whether the moving rod abuts against the side wall of the pipe to be installed.
[0012] Preferably, the positioning structure is provided in four sets, and the four sets of positioning structures are symmetrically arranged in pairs on the side walls of the two pipe clamps.
[0013] Preferably, the length of the positioning rod is 8cm to 15cm.
[0014] Preferably, the inner walls of the two clamps are provided with rubber linings.
[0015] Compared with the prior art, the pipe welding positioning fixture provided by this utility model has the following advantages: In use, this device employs two connectors to attach two pipe clamps to one end of the existing pipe, the end that will connect to the pipe to be installed. This allows the moving rod to move relative to the fixed ring until one end of the moving rod perpendicularly abuts against the side wall of the pipe to be installed. This aligns the end of the pipe to be installed with the end of the existing pipe, allowing for positioning. The ends of the pipe to be installed and the existing pipe are then welded together. This fixture is used for the rapid assembly of suspended straight pipe sections of equal diameter, and for the docking, leveling, and centering of hot water and steam pipes. It reduces the risks of working at heights while improving centering accuracy, manual welding efficiency, and welding quality. Attached Figure Description
[0016] Figure 1 This is a top view of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a side view of the present invention; Figure 4 This is a schematic diagram of the positioning structure of this utility model. Detailed Implementation
[0017] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.
[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this utility model 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. Therefore, they should not be construed as limitations on this utility model.
[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0020] Furthermore, in the description of this utility model, "a plurality of" refers to two or more. The terms "first" and "second" are used for descriptive purposes only and should not be construed as implying or suggesting relative importance or implicitly indicating 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.
[0021] Example 1 like Figure 1 , Figure 3 As shown, this utility model provides a pipe welding positioning fixture, comprising: a fixing structure and a positioning structure. The fixing structure includes two pipe clamps 1 and two connectors. The pipe clamps 1 are semi-circular and have lugs. When the two pipe clamps 1 are closed, they form a circle, which can match the circumferential shape of the pipe. The two pipe clamps 1 are used to fit onto the side wall of the existing pipe 7 and are located at the end of the existing pipe 7 that is to be connected to the pipe 8 to be installed. The two connectors are respectively set at both ends of the two pipe clamps 1, that is, set on the lugs at both ends of the two pipe clamps 1. The two connectors are used to connect the two pipe clamps 1. By setting the two connectors, a detachable connection between the two pipe clamps 1 and the existing pipe 7 can be achieved, which facilitates the alignment and connection of the existing pipe 7 and the pipe 8 to be installed. Multiple sets of positioning structures are evenly arranged on the two pipe clamps 1. On the side wall, the positioning structure is used to assist in centering. In this embodiment, the positioning structure includes a positioning rod 3, a fixing ring 5, and a moving rod 4. The positioning rod 3 is L-shaped, that is, it is formed by connecting a horizontal rod and a vertical rod. One end of the positioning rod 3 is fixed to the side wall of the pipe clamp 1. The fixing ring 5 is set at the other end of the positioning rod 3. The horizontal rod is shorter and the vertical rod is longer. The horizontal rod is horizontally connected to the side wall of the pipe clamp 1. The axial direction of the vertical rod is consistent with the axial direction of the existing pipe 7 and the pipe 8 to be installed. The fixing ring 5 is set at the end of the vertical rod away from the horizontal rod. The moving rod 4 is horizontally inserted into the fixing ring 5 and can move relative to the fixing ring 5. One end of the moving rod 4 is used to abut against the side wall of the pipe 8 to be installed. In use, this device employs two connectors to install two pipe clamps 1 at one end of the existing pipe 7, which is the end connected to the pipe 8 to be installed. This allows the moving rod 4 to move relative to the fixed ring 5 until one end of the moving rod 4 perpendicularly abuts against the side wall of the pipe 8 to be installed, aligning the end of the pipe 8 to be installed with the end of the existing pipe 7 for positioning. Then, the ends of the pipe 8 to be installed and the existing pipe 7 are welded together. This fixture is used for the rapid assembly of suspended straight pipe sections of equal diameter, and for the docking, leveling, and centering of hot water and steam pipes. It reduces the risks of working at heights while improving centering accuracy, manual welding efficiency, and welding quality. Compared to traditional welding methods, the centering time is reduced to 1 / 3, and it supports simultaneous operation at two workstations.
[0022] This embodiment provides a connection method in which the fixed ring 5 and the movable rod 4 can move relative to each other, such as... Figure 2As shown, the inner sidewall of the fixing ring 5 is further provided with internal threads. The moving rod 4 is the first bolt, which is threadedly connected to the fixing ring 5, i.e., the fixing ring 5 is a nut. The nut is matched with the first bolt. By rotating the first bolt, the positional relationship between the tooling and the pipe 8 to be installed can be adjusted to achieve the purpose of positioning and fixing. In this embodiment, not only can the moving rod 4 move relative to the fixing ring 5, but the position of the first bolt is also fixed after rotation and movement, that is, the position of the moving rod 4 is fixed, which makes it easier to accurately position.
[0023] Furthermore, the inner walls of the two pipe clamps 1 are provided with rubber liners 9 to increase friction and facilitate a stable connection between the pipe clamps 1 and the existing pipe 7. The rubber liners 9 can be made of styrene-butadiene rubber, nitrile rubber, or other materials with a relatively high coefficient of friction, which increases frictional force.
[0024] Furthermore, the connecting component is the second bolt 2. Both ends of the two pipe clamps 1 have threaded holes, and the second bolt 2 is threaded into both holes sequentially. This connection using the second bolt 2 allows for the installation of pipes of different diameters. The pipe clamps 1 are secured to the longitudinal position of the pipe 8 to be installed by friction and the second bolt 2. Additionally, for a more secure connection, after the second bolt 2 is threaded into the two holes, a nut can be installed to fix the position of the second bolt 2. Figure 1 The nut is on the right side of the second bolt 2.
[0025] like Figure 1 As shown, further, the positioning structure is provided in four sets. The four sets of positioning structures are symmetrically arranged in pairs on the side walls of the two pipe clamps 1, and the four sets of positioning structures are respectively located at the four equal division points of the circle formed by the two pipe clamps 1. The four-point positioning principle is adopted to restrict the horizontal degree of freedom of the installed pipe, which can reduce the error to ≤0.05mm.
[0026] like Figure 3 As shown, the length of the positioning rod 3 is 8cm to 15cm, that is, the length of the vertical rod is 8cm to 15cm. The positioning rod 3 needs to position the pipe 8 to be installed so that the end of the pipe 8 to be installed is aligned with the end of the existing pipe 7. If the length of the positioning rod 3 is less than 8cm or greater than 15cm, it will be not conducive to the alignment of the pipe 8 to be installed.
[0027] Example 2 As a further alternative to Embodiment 1, this embodiment provides another connection method in which the moving rod 4 and the fixed ring 5 move relative to each other, such as... Figure 4As shown, further, a sliding groove is provided on the side wall of the moving rod 4, the sliding groove is opened along the axial direction of the moving rod 4, and a slider is provided on the inner wall of the fixing ring 5. The slider is locked in the sliding groove, and the slider is slidably connected to the sliding groove. That is, the sliding connection between the slider and the sliding groove can guide the movement direction of the moving rod 4. The cross-section of the sliding groove is T-shaped. The T-shaped sliding groove can prevent the slider from falling off the sliding groove and can limit the slider to avoid the moving rod 4 from slipping off the fixing ring 5. It also includes: a third bolt 10 passing through the side wall of the fixing ring 5, the third bolt 10 being threadedly connected to the fixing ring 5, and the end of the third bolt 10 being used to abut against the side wall of the moving rod 4. In this embodiment, the slider slides within the groove by sliding the moving rod 4 until one end of the moving rod 4 abuts against the side wall of the pipe 8 to be installed. Then, by rotating the third bolt 10, the end of the third bolt 10 extends into the fixing ring 5 and abuts against the side wall of the moving rod 4. The position of the moving rod 4 is fixed by the third bolt 10. This not only allows the moving rod 4 to move relative to the fixing ring 5, but also fixes the position of the moving rod 4, making it easier to position accurately.
[0028] In this embodiment, only the connection method between the moving rod 4 and the fixed ring 5 in embodiment 1 has been replaced, while the other structures remain unchanged.
[0029] Example 3 As a further improvement on Embodiment 1, the positioning rod 3 further includes a first rod and a second rod. The first rod is horizontally set on the side wall of the pipe clamp 1. One end of the second rod is fixed to the end of the first rod away from the pipe clamp 1, and the fixing ring 5 is set on the other end of the second rod. The length direction of the second rod is consistent with the axial direction of the existing pipe 7. That is, the first rod is the horizontal rod in Embodiment 1, and the second rod is the vertical rod in Embodiment 1. A level bubble 6 is provided on the second rod, that is, the level bubble 6 is set on the vertical rod. The level bubble 6 is used to assist in centering. The level bubble 6 serves as an auxiliary tool in the centering process. Based on the observation of the bubble displacement in the level bubble 6, the first bolt is adjusted to rotate for centering. After final centering, the level bubble 6 also serves as a verification basis for the completion of centering.
[0030] Furthermore, a pressure sensor is provided at the end of the moving rod 4 that abuts against the side wall of the pipe 8 to be installed. The pressure sensor is used to detect whether the moving rod 4 abuts against the side wall of the pipe 8 to be installed. After the moving rod 4 abuts against the pipe 8 to be installed, the pressure sensor is subjected to pressure, which can determine whether the moving rod 4 abuts against the side wall of the pipe 8 to be installed. At the same time, the pressure sensor can monitor the pressure value in real time, that is, the clamping force between the moving rod 4 and the side wall of the pipe 8 to be installed. By adjusting the values detected by the pressure sensors in multiple positioning structures to be consistent, the positioning accuracy can be further guaranteed.
[0031] In this embodiment, the other structures are the same as in embodiment 1, except that optimizations have been made to embodiment 1.
[0032] The following steps are included when using this tooling: First step of pre-positioning: When connecting pipes, first fix the two pipe clamps 1 to the end of the existing pipe 7 (tighten the second bolt 2 on the clamp lug of the pipe clamp 1).
[0033] The second step is centering and adjustment: Connect the pipe opening of the pipe to be installed 8 with the pipe opening of the existing pipe 7, and use the first bolt at the end of the positioning rod 3 of the multi-set positioning structure to quickly adjust and center the pipe to ensure coaxiality.
[0034] The third step is clamping and fixing: the first bolt at the end of the positioning rod 3 is screwed onto the outer wall of the pipe 8 to be installed, and the bubble level 6 is used to assist in centering to ensure that the tooling is in a horizontal position, thus completing the welding preparation.
[0035] The advantages of this invention are that, during use, two connecting pieces are used to install two pipe clamps at one end of the existing pipe, i.e., the end that connects to the pipe to be installed. This allows the moving rod to move relative to the fixed ring until one end of the moving rod perpendicularly abuts against the side wall of the pipe to be installed, aligning and positioning the end of the pipe to be installed with the end of the existing pipe. Then, the ends of the pipe to be installed and the ends of the existing pipe can be welded together. This fixture is used for the rapid assembly of suspended straight pipe sections of equal diameter, and for the docking, leveling, and centering of hot water and steam pipes. It reduces the risks of working at heights while improving centering accuracy, manual welding efficiency, and welding quality.
[0036] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.
Claims
1. A pipe welding positioning fixture, characterized in that, include: The fixed structure includes two pipe clamps (1) and two connectors. The pipe clamps (1) are semi-circular. The two pipe clamps (1) are circular when they are joined together. The two pipe clamps (1) are used to fit on the side wall of the existing pipe (7). The two connectors are respectively set at both ends of the two pipe clamps (1) and are used to connect the two pipe clamps (1). Multiple positioning structures are evenly arranged on the side walls of the two pipe clamps (1). The positioning structure includes a positioning rod (3), a fixing ring (5), and a moving rod (4). The positioning rod (3) is L-shaped. One end of the positioning rod (3) is fixed on the side wall of the pipe clamp (1). The fixing ring (5) is arranged at the other end of the positioning rod (3). The moving rod (4) is horizontally inserted into the fixing ring (5). One end of the moving rod (4) is used to abut against the side wall of the pipe (8) to be installed.
2. The pipe welding positioning fixture according to claim 1, characterized in that, The inner ring sidewall of the fixed ring (5) is provided with internal threads, and the moving rod (4) is the first bolt, which is threadedly connected to the fixed ring (5).
3. The pipe welding positioning fixture according to claim 1, characterized in that, A groove is provided on the side wall of the movable rod (4), the groove being opened along the axial direction of the movable rod (4). A slider is provided on the inner wall of the fixing ring (5), the slider being fitted into the groove and slidably connected to the groove. The groove has a T-shaped cross-section and further includes: The third bolt (10) is inserted through the side wall of the fixed ring (5). The third bolt (10) is threaded to the fixed ring (5), and the end of the third bolt (10) is used to abut against the side wall of the moving rod (4).
4. The pipe welding positioning fixture according to claim 1, characterized in that, The connecting component is a second bolt (2), and the ends of the two pipe clamps (1) are provided with screw holes. The second bolt (2) is threadedly connected to the two screw holes in sequence.
5. A pipe welding positioning fixture according to claim 1, characterized in that, The positioning rod (3) includes a first rod and a second rod. The first rod is horizontally set on the side wall of the pipe clamp (1). One end of the second rod is fixed to the end of the first rod away from the pipe clamp (1). The fixing ring (5) is set at the other end of the second rod. The length direction of the second rod is consistent with the axial direction of the existing pipe (7). A spirit level (6) is provided on the second rod. The spirit level (6) is used to assist in centering.
6. The pipe welding positioning fixture according to claim 5, characterized in that, A pressure sensor is provided at one end of the moving rod (4) that abuts against the side wall of the pipe (8) to be installed. The pressure sensor is used to detect whether the moving rod (4) abuts against the side wall of the pipe (8) to be installed.
7. The pipe welding positioning fixture according to claim 1, characterized in that, The positioning structure is provided in four sets, and the four sets of positioning structures are symmetrically arranged in pairs on the side walls of the two pipe clamps (1).
8. A pipe welding positioning fixture according to claim 1, characterized in that, The length of the positioning rod (3) is 8cm to 15cm.
9. A pipe welding positioning fixture according to claim 1, characterized in that, The inner walls of the two clamps (1) are provided with rubber liners (9).