A welding tool for a special-shaped pipe body of a direct-insert type ultrasonic flowmeter

Abstract

This utility model relates to the field of welding equipment technology, specifically disclosing a welding fixture for a straight-insertion ultrasonic flow meter with irregularly shaped tubes, including a base, a fixed positioning block one, a movable positioning block two, a guide rail slider assembly, and a pressure plate. Positioning block one is fixed to the left side of the base and has a main pipe guide groove one and a side pipe guide groove; positioning block two is slidably connected to the right side of the base via the guide rail slider assembly and has a main pipe guide groove two collinear with the main pipe guide groove one and an arc-shaped pipe guide groove matching the arc-shaped pipe section. The pressure plate achieves vertical clamping of the tube body through a locking screw one. The innovation lies in: a dynamic adaptation structure: the guide rail slider assembly allows for continuous adjustment of the horizontal position of positioning block two; a precise positioning system: each guide groove end has a positioning waist-shaped groove, which also serves as a clamping fine-tuning reference and a clamping and picking function; a three-dimensional constraint mechanism: the horizontal limit of the guide grooves cooperates with the vertical clamping of the pressure plate to control the amount of welding deformation; the welding preparation time is shortened, and the yield rate is improved, making it suitable for high-precision welding of irregularly shaped tubes.

Description

Technical Field

[0001] This utility model relates to the field of welding equipment technology, specifically to a welding fixture for a straight-insertion ultrasonic flow meter with irregularly shaped tubes. Background Technology

[0002] Direct-insertion ultrasonic flow meters are widely used in liquid flow monitoring due to their advantages of non-contact measurement and high accuracy. Their core sensing unit typically employs a bifurcated tube structure, with two symmetrical branches requiring precise installation of ultrasonic transducers.

[0003] However, the welding and assembly process of this bifurcated pipe body faces significant technical bottlenecks: Insufficient positioning accuracy: The spatial geometry of the welding points on the bifurcated pipe body is complex (e.g., angles, spacing, coaxiality). Manual positioning relies on operator experience and is easily affected by visual errors and manual adjustment deviations, resulting in poor consistency in welding positions. Low production efficiency: The relative positions of the branch pipes need to be repeatedly calibrated before welding, consuming a lot of time and making it difficult to achieve standardized operations for mass production. Product quality fluctuations: Positioning deviations directly cause the ultrasonic propagation path to shift, reducing the accuracy of flow velocity measurement; at the same time, uneven distribution of welding stress may cause pipe deformation, affecting product sealing and long-term stability. Existing technology lacks dedicated positioning tooling, which restricts the improvement of product yield and performance reliability.

[0004] Furthermore, to meet the needs of more customers, the same manufacturer produces multiple models of direct-insertion ultrasonic flowmeters (such as...). Figure 5 As shown in the figure, the main pipe of its bifurcated pipe body also has multiple dimensions, which puts forward higher requirements and welding difficulty for the workers who weld and assemble the bifurcated pipe body. Utility Model Content

[0005] The purpose of this invention is to provide a welding fixture for the irregularly shaped tube of a direct-insertion ultrasonic flow meter, which aims to overcome the defects of the existing technology and solve the problems of insufficient positioning accuracy, low production efficiency, and product quality fluctuations in the existing manual welding process.

[0006] To address this, the present invention proposes a welding fixture for a straight-insertion ultrasonic flow meter with an irregularly shaped tube, comprising: a base, a fixed positioning block, a movable positioning block, a guide rail slider assembly, and a pair of pressure plates; the fixed positioning block is fixed to the left side of the base, and has a main tube guide groove and a side tube guide groove on its upper part; the movable positioning block is slidably connected to the right side of the base through the guide rail slider assembly, and has a main tube guide groove and an arc-shaped tube guide groove on its upper part; the pressure plates are detachably connected to the fixed positioning block and the movable positioning block through a locking screw, and are used to press the irregularly shaped tube in the vertical direction.

[0007] As a preferred technical solution of this application, the ends of the side tube guide groove, the main tube guide groove, and the arc-shaped tube guide groove are all provided with positioning waist-shaped grooves to assist in clamping and removing the workpiece.

[0008] As a preferred technical solution of this application, the second main guide groove is collinear with the first main guide groove and has the same size.

[0009] As a preferred technical solution of this application, a scale is provided on the upper end of the base, which is arranged parallel to the long side of the movable positioning block.

[0010] As a preferred technical solution of this application, the guide rail slider assembly includes a guide rail, a slider and two locking screws, the slider is used to fix the movable positioning block, and the two locking screws are used to fix the position of the slider.

[0011] As a preferred technical solution of this application, the horizontal position of the movable positioning block is adjustable, and it can be adapted to irregularly shaped tubes of different lengths by sliding the slider.

[0012] As a preferred technical solution of this application, the fixed positioning block and the movable positioning block are respectively provided with a pair of threaded holes at their upper ends, and the size of the threaded holes matches the size of the locking screw.

[0013] As a preferred technical solution of this application, the locking screw is an internal hexagon screw, and the circumferential surface of its top column has knurling.

[0014] The welding fixture for the irregular tube body of the direct-insertion ultrasonic flow meter provided by this utility model has the following features: 1) Dynamic adaptation structure: The horizontal sliding of the movable positioning block is realized through the guide rail slider assembly, breaking through the limitations of fixed fixtures; 2) Fine adjustment-quick access integration: The waist-shaped groove simultaneously serves as the positioning reference and clamp operation hole, reducing auxiliary processes; 3) Composite constraint mechanism: The pressure plate (vertical) + guide groove (horizontal) + waist-shaped groove (angle fine adjustment) constitute a three-dimensional positioning system; 4) Ergonomic optimization: All operating surfaces are open to avoid welding interference and improve operational safety.

[0015] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 This is an exploded top view of the welding fixture for the irregularly shaped tube of the direct-insertion ultrasonic flow meter of this utility model.

[0018] Figure 2 This is an exploded view of the welding fixture for the irregularly shaped tube of the direct-insertion ultrasonic flow meter of this utility model.

[0019] Figure 3 This is a top view of the welding fixture for the irregularly shaped tube of the direct-insertion ultrasonic flow meter of this utility model.

[0020] Figure 4 This is a front view of the welding fixture for the irregularly shaped tube of the direct-insertion ultrasonic flow meter of this utility model.

[0021] Figure 5 This is a schematic diagram of the irregularly shaped tube of the direct-insertion ultrasonic flow meter of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1. Base; 2. Fixed positioning block; 3. Movable positioning block; 4. Guide rail slider assembly; 5. Pressure plate; 8. Irregularly shaped tube body; 11. Scale; 21. Main pipe guide groove one; 22. Side pipe guide groove; 23. Positioning waist-shaped groove; 24. Threaded hole; 31. Main pipe guide groove two; 32. Arc-shaped pipe guide groove; 41. Guide rail; 42. Slider; 43. Locking screw two; 51. Locking screw one; 52. Through hole; 81. Main pipe body; 82. Side pipe body. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] like Figures 1-5 As shown, the welding fixture for the irregularly shaped tube of the direct-insertion ultrasonic flow meter of this utility model includes: a base 1, a fixed positioning block 2, a movable positioning block 3, a guide rail slider assembly 4, and a pair of pressure plates 5; the fixed positioning block 2 and the movable positioning block 3 are respectively installed on the upper end of the base 1, and the movable positioning block 3 and the guide rail slider assembly 4 are respectively provided with guide grooves for placing the irregularly shaped tube 8. The pair of pressure plates 5 are detachably fixed to the movable positioning block 3 and the guide rail slider assembly 4 by locking screws 51, and are used to position the irregularly shaped tube 8 in the vertical direction.

[0025] Among them, the fixed positioning block 2 is a fixed part, and the movable positioning block 3 is a movable part. The fixed positioning block 2 is fixedly installed on the upper left side of the base 1, and the movable positioning block 3 is slidably connected to the upper right side of the base through the guide rail slider assembly 4. The position of the movable positioning block 3 can be adjusted to adapt to the welding of different length irregular tubes 8.

[0026] Specifically, the upper end of the fixed positioning block 2 is provided with a main pipe guide groove 21 and a side pipe guide groove 22, which are respectively matched with the shapes of the main pipe body 81 and the side pipe body 82 in the shaped pipe body 8; at the same time, the end of the side pipe guide groove 22 is provided with a positioning waist-shaped groove 23. The setting of the positioning waist-shaped groove 23 is conducive to the staff clamping the side pipe body 82 and further accurately adjusting its position, so that the dimensional accuracy of the welded shaped pipe body 8 is higher. Similarly, the middle part of the main pipe guide groove 21 is also provided with at least one positioning waist-shaped groove 23, which makes it convenient for the staff to quickly remove the welded shaped pipe body 8 from the guide groove with clamps.

[0027] The upper end of the movable positioning block 3 is provided with a main guide groove 2 31 and an arc-shaped guide groove 32. The main guide groove 2 31 is collinear with the main guide groove 1 21 and both have the same depth and width. The arc-shaped guide groove 32 matches the arc-shaped structure at the front end of the main body 81. In addition, the end of the arc-shaped guide groove 32 is also provided with a positioning waist-shaped groove 23, which is also convenient for workers to quickly remove the welded irregular tube body 8 from the guide groove using clamps.

[0028] like Figure 2 As shown, the guide rail slider assembly 4 includes a guide rail 41 and a slider 42. The guide rail 41 is fixedly connected to the base 1 by bolts, and the slider 42 is fixedly connected to the upper movable positioning block 3. At the same time, a locking screw 43 is installed on the side wall of the slider 42. By rotating the locking screw 43, the slider 42 is positioned at the designated position of the guide rail 41, and the horizontal position of the movable positioning block 3 is further adjusted, so that the positioning mechanism composed of the fixed positioning block 2 and the movable positioning block 3 can adapt to the welding of irregular tubes of different lengths.

[0029] like Figure 1 As shown, a pair of threaded holes 24 are respectively provided on the upper end of the fixed positioning block 2 and the movable positioning block 3. The size of the threaded holes matches the size of the locking screw 51. At the same time, the pressure plate 5 is provided with a through hole 52. The locking screw 51 passes through the through hole 52 and is threadedly connected to the threaded hole 24. Thus, the pressure plate 5 is used to vertically position the irregular tube 8 placed in the guide groove, ensuring the accuracy of the relative position between the tubes.

[0030] Among them, the locking screw 51 is an internal hexagon screw, and its top column has knurling on its circumferential surface, which makes it convenient for workers to quickly tighten and can also be tightened with an internal hexagon wrench to ensure that the pressure plate 5 is installed in place and further ensures the precise positioning of the irregular tube 8.

[0031] In one embodiment, a scale 11 is provided on the upper end of the base 1, which is parallel to the long side of the movable positioning block 3. During the adjustment of the movable positioning block 3, by observing the numbers corresponding to the end face of the movable positioning block 3 and the scale 11, it can be quickly adjusted to the specified position, thereby improving work efficiency and product accuracy.

[0032] The following is a brief description of the working process of the welding fixture for the irregularly shaped tube of the direct-insertion ultrasonic flow meter of this utility model.

[0033] First, adjust the tooling: slide the movable positioning block 3 to the target position and tighten the locking screw 43 to fix it; then place the pipe body: insert the main pipe body 81 of the irregular pipe body 8 into the main pipe guide groove 21 and the main pipe guide groove 31, put the side pipe body 82 into the side pipe guide groove 22, and insert the arc-shaped pipe section into the arc-shaped pipe guide groove 32; second, accurately position: finely adjust the position of the pipe body by positioning the waist-shaped groove 23 to ensure that the welding points are aligned; then, press and fix: cover the pipe body with the pressure plate 5 and screw in the locking screw 51 to press it; finally, weld and remove: after welding is completed, loosen the pressure plate 5 and use pliers to insert into the waist-shaped groove 23 to remove the workpiece.

[0034] The welding fixture for the irregularly shaped tube of the direct-insertion ultrasonic flow meter of this utility model also has the following features: 1) High-precision positioning: The template has a built-in positioning groove and pressure plate structure that is geometrically matched with the branched tube, which constrains the spatial freedom of each branch and ensures that the spatial coordinate error of the welding point is ≤0.1mm, fundamentally eliminating the uncertainty of manual operation; 2) Improved product performance consistency: It ensures precise alignment of the transducer mounting base, significantly improving the accuracy of flow rate measurement; 3) Increased efficiency and reduced costs: The operator only needs to place the tube into the template position for automatic alignment, which shortens the preparation time for welding a single piece by more than 70%; it reduces the dependence on highly skilled welders and reduces training costs by 50%; 4) Expanded process adaptability: The modular template design can be adapted to the welding of tubes of different lengths with the same diameter, supporting rapid switching of production for multiple models of products.

[0035] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A welding tool for a special-shaped pipe body of a direct-insertion ultrasonic flowmeter, characterized by comprising: include: Base (1), fixed positioning block (2), movable positioning block (3), guide rail slider assembly (4) and a pair of pressure plates (5); The fixed positioning block (2) is fixed to the left side of the base (1), and a main pipe guide groove (21) and a side pipe guide groove (22) are opened on its upper part. The movable positioning block (3) is slidably connected to the right side of the base (1) through the guide rail slider assembly (4), and a main guide groove (31) and an arc-shaped guide groove (32) are opened on its upper part. The pressure plate (5) is detachably connected to the fixed positioning block (2) and the movable positioning block (3) by a locking screw (51) and is used to press the irregular tube body (8) in the vertical direction.

2. The welding tooling for a straight-in ultrasonic flowmeter profiled tube body of claim 1, wherein, The ends of the side tube guide groove (22), the main tube guide groove (21), and the arc-shaped tube guide groove (32) are all provided with positioning waist-shaped grooves (23) to assist in clamping and removing the workpiece.

3. The welding fixture for the irregularly shaped tube of the direct-insertion ultrasonic velocimeter according to claim 1, characterized in that, The main guide channel 2 (31) is collinear with the main guide channel 1 (21) and has the same size.

4. The welding tooling for a straight-in ultrasonic flowmeter profiled tube body of claim 1, wherein, The base (1) is provided with a scale (11) at its upper end, which is parallel to the long side of the movable positioning block (3).

5. The welding tooling for a straight-in ultrasonic flowmeter profiled tube body of claim 1, wherein, The guide rail slider assembly (4) includes a guide rail (41), a slider (42) and a second locking screw (43). The slider (42) fixes the movable positioning block (3), and the second locking screw (43) is used to fix the position of the slider.

6. The welding tooling for a straight-in ultrasonic flowmeter profiled tube body of claim 5, wherein, The horizontal position of the movable positioning block (3) is adjustable, and it can be adapted to different lengths of irregular tubes (8) by sliding the slider (42).

7. The welding tooling for a straight-in ultrasonic flowmeter profiled tube body of claim 1, wherein, The fixed positioning block (2) and the movable positioning block (3) are respectively provided with a pair of threaded holes (24) at their upper ends. The size of the threaded holes (24) matches the size of the locking screw (51).

8. The welding tooling for a straight-in ultrasonic flowmeter profiled tube body of claim 1, wherein, The locking screw (51) is an internal hexagon screw, and its top column has knurling on its circumferential surface.

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