A portable elbow welding angle measuring device

Abstract

The utility model discloses a portable elbow welding angle measuring device, including measuring scale, be provided with scale on the measuring scale, the lower extreme pivoted joint of measuring scale has connecting rod, one end of connecting rod is provided with fixed part, and the other end of connecting rod is provided with handle, the fixed part is used for with elbow pipe contact fixed, one side of measuring scale is provided with positioning part, and the adjusting rod is provided between measuring scale and positioning part, and the swing pin is rotatively connected on measuring scale, and the swing pin is used for determining angle. The utility model discloses through setting up splay shape fixed part and other structures, first, the physical adhesion structure of stable and firm eliminates the measurement sliding, provides the benchmark for measurement, and the fixed mode of having the magnetic force and the friction force then makes it not to be restricted by pipe material, is applicable to all metal elbow pipes, improves the versatility and reliability of the tool.

Description

Technical Field

[0001] This utility model relates to the field of pipe bending welding technology, and more specifically, to a portable elbow welding angle measuring device. Background Technology

[0002] The purpose of pipe bend welding is to construct and repair path bends in pipeline systems, thereby ensuring that the medium can be transported along a predetermined and precise route. These pipelines are rarely straight; they often need to cross obstacles, bypass existing facilities, or achieve specific process layouts, which necessitates the use of bends to change direction. Therefore, the ultimate goal of pipe bend welding is to combine individual pipe fittings into a complete, sealed, robust, and accurately oriented pipeline network. Whether transporting water, steam, oil, gas, or various chemical raw materials, these high-quality welds are essential to ensuring the long-term stability and safe operation of the system.

[0003] In pipe bending welding, the bend angle directly affects the functionality, structural strength, and overall safety of the pipeline system. Precise angle ensures the final pipeline route matches the design, preventing positional deviations after long-distance laying that could lead to connection failures or functional malfunctions. Secondly, angle deviations create stress concentration points at the weld, making the pipeline highly susceptible to fatigue fracture under pressure, temperature changes, or vibration, potentially leading to leaks or explosions and other serious safety accidents.

[0004] However, in the existing technology, conventional general-purpose rulers need to be in contact with a flat and regular plane to take a reading. The welding surface of a bend is a complex curved surface, which cannot provide a stable and reliable support point for the measuring tool, making it difficult to guarantee the measurement accuracy. Therefore, we propose a portable bend welding angle measuring device. Utility Model Content

[0005] One objective of this invention is to provide a new technical solution for a portable elbow welding angle measuring device.

[0006] According to a first aspect of this utility model, a portable elbow welding angle measuring device is provided, including a measuring ruler with graduations, a connecting rod rotatably connected to the lower end of the measuring ruler, a fixing member at one end of the connecting rod, a handle at the other end of the connecting rod, the fixing member for contacting and fixing with the elbow, a positioning member on one side of the measuring ruler, an adjusting rod between the measuring ruler and the positioning member, and a pendulum needle rotatably connected to the measuring ruler for determining the angle.

[0007] Optionally, the fastener is arranged in a figure-eight shape, the included angle of the fastener is rounded, and the fastener is magnetically connected to the bend.

[0008] Optionally, the measuring ruler is fixedly connected to the adjusting rod, and the adjusting rod is rotatably connected to the positioning component.

[0009] Optionally, the adjusting assembly includes a sleeve and a screw. The sleeve is rotatably connected to the measuring scale, and the sleeve is parallel to the tangent direction of the measuring scale. The sleeve is threadedly connected to the screw, and the screw is rotatably connected to the positioning element.

[0010] Optionally, a gripper is rotatably connected to the positioning member, and a spring is provided between the positioning member and the gripper, the spring being used to reset the gripper.

[0011] Optionally, the gripper is provided with a through groove, which is corresponding to the measuring side and is used for marking and guiding.

[0012] According to one embodiment of this disclosure, the portable elbow welding angle measuring device, by setting up a figure-eight shaped fixing component and other structures, firstly, the stable physical fit structure prevents measurement slippage and provides a reference for measurement; and the fixing mode that combines magnetic force and friction makes it not limited by the pipe material and applicable to all metal bends, improving the versatility and reliability of the tool. At the same time, the structure of this embodiment is simple, easy to carry, and convenient to operate.

[0013] Secondly, by setting up structures such as spring-reset grippers and through slots, the precise angle readings on the measuring ruler are directly and non-destructively converted into physical marking lines on site through a physical through slot aligned with the measurement reference. This not only simplifies the operation steps and combines the original cumbersome measurement and marking process into one, but also eliminates errors in the intermediate conversion process, ensuring accuracy from measurement to execution, thereby improving work efficiency and project quality.

[0014] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0016] Figure 1 A schematic diagram of the overall structure of a portable elbow welding angle measuring device provided by this utility model;

[0017] Figure 2 A cross-sectional schematic diagram of the adjusting rod structure of a portable elbow welding angle measuring device provided by this utility model;

[0018] Figure 3 A schematic diagram of the gripper structure of a portable elbow welding angle measuring device provided by this utility model.

[0019] The following are marked in the diagram: 1. Measuring ruler; 11. Connecting rod; 12. Fixing component; 13. Handle; 2. Positioning component; 21. Clamp; 22. Spring; 23. Through groove; 3. Adjusting rod; 31. Sleeve; 32. Screw; 4. Swing needle. Detailed Implementation

[0020] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0021] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0022] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0023] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0024] like Figure 1-3 As shown, a portable elbow welding angle measuring device includes a measuring ruler 1 with a scale. The lower end of the measuring ruler 1 is rotatably connected to a connecting rod 11. One end of the connecting rod 11 is provided with a fixing member 12, and the other end of the connecting rod 11 is provided with a handle 13. The fixing member 12 is used to contact and fix the elbow. A positioning member 2 is provided on one side of the measuring ruler 1. An adjusting rod 3 is provided between the measuring ruler 1 and the positioning member 2. A pendulum needle 4 is rotatably connected to the measuring ruler 1 and is used to determine the angle.

[0025] It should be noted that the rotating structure of the measuring ruler 1 and the connecting rod 11 adopts a damped rotating structure commonly found on the market, and the positioning part 2 and the adjusting rod 3, the pendulum 4 and the measuring ruler 1 all adopt similar structures. When placed for measurement, the rotating structure swings loosely, causing measurement errors.

[0026] Furthermore, this invention utilizes a rotatable connecting rod 11 to combine the measuring ruler 1 with a fixing member 12 that can adaptively conform to the outer arc surface of the bent pipe, thereby solving the problem of "no reference point" in traditional measuring tools. This allows the measuring ruler 1 to be stably suspended on the surface of the bent pipe, forming a reliable measuring reference. At the same time, the spatial posture of the measuring ruler 1 can be precisely locked by the cooperation of the adjusting rod 3 and the positioning member 2; and the intersection of the pendulum 4 with the scale of the measuring ruler 1 allows for a direct reading of the actual angle of the bent pipe.

[0027] Specifically, the fastener 12 is arranged in a figure-eight shape, the included corner of the fastener 12 is rounded, and the fastener 12 is magnetically connected to the bend.

[0028] Furthermore, firstly, the magnetic fastener 12, with its "figure-eight" structure combined with a chamfer, forms a highly efficient and stable fitting structure for the pipe. The "figure-eight" configuration can stably "hug" the outer arc surface of the bend through its two arms, forming a natural multi-point contact, providing a solid physical reference for subsequent angle measurements.

[0029] The rounded corners not only prevent scratching the pipes, but also ensure that the fastener 12 makes line contact with the surface of the bend rather than point contact when applied to some smaller diameter bends, increasing the contact area and friction, and making the magnetic attraction more secure and reliable.

[0030] Secondly, when faced with bends made of non-magnetic materials such as stainless steel and aluminum alloy, the operator can use the friction and pressure generated between the handle 13 and the bend surface to forcibly fix the device. The "dual-mode" fixing method—which relies on the convenience of magnetic force while retaining the controllability of human power—makes the device no longer limited by the magnetism of the material being tested, and can be used for bends made of almost all materials of metal.

[0031] Specifically, the measuring ruler 1 is fixedly connected to the adjusting rod 3, and the adjusting rod 3 is rotatably connected to the positioning component 2.

[0032] The adjustment assembly includes a sleeve 31 and a screw 32. The sleeve 31 is rotatably connected to the measuring ruler 1 and the tangent direction of the sleeve 31 is parallel to that of the measuring ruler 1. The sleeve 31 is threadedly connected to the screw 32 and the screw 32 is rotatably connected to the positioning member 2.

[0033] Furthermore, firstly, the threaded pair formed by the sleeve 31 and the screw 32 can control the extension length of the positioning element 2, ensuring that the pressure of the positioning element 2 is firmly pressed against the surface of the bend, forming a support point; secondly, it can prevent instability or angle deviation that may occur during the measurement process due to slight shaking of the pipe or human touch.

[0034] Specifically, a gripper 21 is rotatably connected to the positioning component 2, and a spring 22 is provided between the positioning component 2 and the gripper 21. The spring 22 is used to reset the gripper 21. A through groove 23 is provided on the gripper 21, and the through groove 23 is corresponding to the measuring side. The through groove 23 is used for marking and guiding.

[0035] Furthermore, firstly, the through slot 23 is used to provide precise marking guidance. Since the through slot 23 corresponds precisely to the measuring scale 1, serves as the starting point for marking on the measuring scale 1, and is located in the center of the gripper 21, it actually forms an "optical aiming line" that coincides with the measuring reference.

[0036] When in use, the operator only needs to put the pen tip or marking needle into the through groove 23 and mark along the trajectory of the through groove 23 to ensure that the drawn lines or marking points extend strictly along the predetermined angle. Its accuracy comes directly from the scale of the measuring ruler 1, thereby eliminating visual errors and operational jitter caused by human eye judgment and manual pen holding.

[0037] Working principle: When in use, first align the fixing part 12 with the middle position of the bend, then rotate the measuring ruler 1 to align the positioning part 2 on the adjusting rod 3 with the starting point of the bend, and then rotate the pendulum needle 4 to the end point of the bend. Through calculation, it can be found that the actual angle of the bend is 180° minus the measuring angle.

[0038] First, attach the fixing piece 12 to the middle of the arc top of the bend (the most stable reference surface), then rotate the measuring ruler 1 to precisely align the positioning piece 2 with the starting point, and finally rotate the pendulum 4 to align with the ending point. The "tool measurement angle" read is the angle between the tangents of the starting point and the ending point.

[0039] The actual angle of the bend is 180° minus the measured value. This simplifies the measurement of complex spatial angles into an intuitive "three-step alignment" operation, ensuring extremely high measurement accuracy and reliability. It eliminates the difficulty of directly measuring small angles and prevents error accumulation through fixed reference points, making the measurement process smooth and the results accurate.

[0040] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A portable elbow welding angle measuring device, comprising a measuring ruler (1), characterized in that: The measuring ruler (1) is provided with a scale. The lower end of the measuring ruler (1) is rotatably connected to a connecting rod (11). One end of the connecting rod (11) is provided with a fixing part (12). The other end of the connecting rod (11) is provided with a handle (13). The fixing part (12) is used to contact and fix with the bent pipe. One side of the measuring ruler (1) is provided with a positioning part (2). An adjusting rod (3) is provided between the measuring ruler (1) and the positioning part (2). A pendulum needle (4) is rotatably connected to the measuring ruler (1). The pendulum needle (4) is used to determine the angle.

2. The portable elbow welding angle measuring device according to claim 1, characterized in that: The fastener (12) is arranged in a figure-eight shape, and the included angle of the fastener (12) is rounded. The fastener (12) is magnetically connected to the bend.

3. The portable elbow welding angle measuring device according to claim 1, characterized in that: The measuring ruler (1) is fixedly connected to the adjusting rod (3), and the adjusting rod (3) is rotatably connected to the positioning component (2).

4. The portable elbow welding angle measuring device according to claim 3, characterized in that: It also includes an adjustment assembly, which includes a sleeve (31) and a screw (32). The sleeve (31) is rotatably connected to the measuring ruler (1). The sleeve (31) is parallel to the tangent direction of the measuring ruler (1). The sleeve (31) is threadedly connected to the screw (32). The screw (32) is rotatably connected to the positioning element (2).

5. The portable elbow welding angle measuring device according to claim 1, characterized in that: A gripper (21) is rotatably connected to the positioning member (2), and a spring (22) is provided between the positioning member (2) and the gripper (21). The spring (22) is used to reset the gripper (21).

6. The portable elbow welding angle measuring device according to claim 5, characterized in that: The gripper (21) has a through groove (23) which is provided corresponding to the measuring side. The through groove (23) is used for marking and guiding.

Images