Wide-area fillet weld measurer

Abstract

The invention belongs to the technical field of measuring devices, and particularly discloses a wide-area fillet weld measuring device which comprises a main ruler, two auxiliary rulers, two weld leg measuring rulers and a weld throat measuring ruler, the two auxiliary rulers are located on the two sides of the main ruler respectively, and the two auxiliary rulers are matched with the main ruler in a sliding and telescopic mode along the concentric circle track of the main ruler; the two welding leg measuring rulers are respectively in radial sliding fit with the two auxiliary rulers, and the welding throat measuring ruler is in radial sliding fit with the main ruler; a locking mechanism is arranged between the auxiliary ruler and the main ruler, and the locking mechanism is used for fixing the relative position of the main ruler and the auxiliary ruler after the auxiliary ruler is adjusted in place. According to the invention, the problem of fillet weld measurement of non-90-degree vertical angle joints can be solved.

Description

Technical Field

[0001] This invention relates to the field of measuring instrument technology, and more specifically to a wide-area fillet weld measuring instrument. Background Technology

[0002] In steel structure construction, a large amount of welding work is required. Weld quality control mainly relies on non-destructive testing (NDT) technology, with visual inspection (VT) being the most widely used method. However, in the visual inspection of fillet welds, the weld leg and throat dimensions are typically measured. But the HJC series weld gauges, currently widely used in the industry for measuring welds, have significant limitations when measuring fillet welds. Figure 14 As shown, the weld size measurement can only be performed on fillet welds of standard 90° vertical corner joints. When the welded joint is not a 90° vertical corner joint, the weld gauge loses one side of the measurement reference plane, making accurate measurement impossible. Currently, there is no measuring instrument or method in the industry that can quickly and effectively measure fillet welds of acute or obtuse angle corner joints. Summary of the Invention

[0003] This invention provides a wide-area fillet weld measuring instrument, which aims to solve the problem of measuring fillet welds in non-90° vertical corner joints.

[0004] This invention is achieved through the following technical solution: a wide-area fillet weld measuring instrument, comprising a main scale, two auxiliary scales, two weld foot measuring scales, and a weld throat measuring scale. The two auxiliary scales are respectively located on both sides of the main scale, and the two auxiliary scales slide and extend with the main scale along a concentric circular trajectory. The two weld foot measuring scales slide radially with the two auxiliary scales, and the weld throat measuring scale slides radially with the main scale. A locking mechanism is provided between the auxiliary scales and the main scale, which is used to fix the relative position of the main scale and the auxiliary scales after adjustment.

[0005] Compared with existing technologies, this solution has the following advantages and beneficial effects:

[0006] In this design, the two auxiliary scales slide and extend along the concentric circular trajectory of the main scale, forming a certain measurement angle range. This allows for the measurement of acute angles, obtuse angles, and 90° vertical corner welds commonly found in steel structure construction. It overcomes the limitation of the traditional HJC series weld gauges, which can only measure 90° vertical corner welds, and fills the industry gap in the measurement of non-standard corner welds.

[0007] The auxiliary ruler slides and extends with the main ruler. After being adjusted to fit the angle of the base material, its relative position can be quickly fixed by the locking mechanism, eliminating the need for additional auxiliary tools and significantly improving on-site inspection efficiency. After measurement, the auxiliary ruler can be retracted to the main ruler, reducing the overall size and making it portable and easy to carry and store on the construction site.

[0008] In this solution, the weld leg measuring ruler and the auxiliary ruler slide radially together, and the weld throat measuring ruler and the main ruler slide radially together, enabling independent measurement of the weld leg and weld throat dimensions, with direct and accurate readings. The measurement process requires no multiple disassembly or adjustment of the instruments, allowing for the acquisition of two key dimensional data points for the same fillet weld in a single measurement, meeting the routine measurement needs of steel structure welding construction.

[0009] Furthermore, both the main scale and the auxiliary scale are fan-shaped structures, and the main scale has two concentrically arranged slide rail grooves, which are arc-shaped grooves. Each of the two auxiliary scales is connected to a slide rail on one side, and the two slide rails respectively slide in an arc-shaped sliding fit with the two slide rail grooves.

[0010] The main ruler is provided with a weld throat groove along its radial direction, and the weld throat groove is located on the line of symmetry of the main ruler. The weld throat measuring ruler slides in conjunction with the weld throat groove. The two auxiliary rulers are provided with weld foot grooves along their radial direction, and the two weld foot measuring rulers slide in conjunction with the two weld foot grooves respectively.

[0011] In this design, the main scale and auxiliary scale adopt a fan-shaped structure, paired with concentrically set arc-shaped slide rail grooves that slide in conjunction with the slide rails, strictly limiting the movement of the auxiliary scale along a concentric circular trajectory. This design ensures the adjustment accuracy of the auxiliary scale's unfolding angle, guarantees a tight fit between the auxiliary scale and the surface of the corner joint base material, effectively avoids measurement reference deviation, and improves the accuracy of measurement data for non-90° corner joint welds.

[0012] The weld throat measuring scale is symmetrically positioned along the radial direction of the main scale, while the weld foot measuring scale is radially positioned along the auxiliary scale, allowing both the weld throat and weld foot measuring scales to slide radially. This design ensures that the sliding direction of the measuring scale aligns with the weld size measurement direction, preventing jamming or misalignment during measurement and guaranteeing stable and reliable readings. Simultaneously, the radial groove layout can withstand the contact pressure during measurement, extending the lifespan of the measuring instrument. The combination of the fan-shaped structure, arc-shaped slide rail, and radial groove fully utilizes the space of the main and auxiliary scales, ensuring a compact overall structure. After measurement, the auxiliary scale can retract along the arc-shaped slide rail to both sides of the main scale, and the measuring scale can be stored within its corresponding groove, significantly reducing storage volume and improving portability.

[0013] Furthermore, scale lines are provided on one side of the weld throat groove and one side of the weld foot groove, and measurement reference lines are provided on both the weld throat measuring ruler and the weld foot measuring ruler to read the corresponding scale lines.

[0014] In this solution, the scale lines on one side of the weld throat and weld foot chute work in conjunction with the measurement baselines on the weld throat and weld foot measuring rulers. Measurement data can be directly read by observing their relative positions. The interaction between the measurement baselines and the scale lines on the chute is intuitive and easy to understand, eliminating the need for additional calculations or auxiliary tools for inspectors. After fixing the angle of the measuring ruler, simply sliding the ruler to align the baseline with the corresponding scale allows for rapid reading, significantly reducing the measurement time for a single weld and improving on-site inspection efficiency.

[0015] Furthermore, the weld throat groove is located on the upper layer of the slide rail groove.

[0016] In this design, the weld throat groove is located on the upper layer of the slide rail groove, enabling layered utilization of the main scale space. This design ensures that the arc-shaped sliding trajectory of the auxiliary scale and the radial sliding trajectory of the weld throat measuring scale do not interfere with each other. Without increasing the overall volume of the main scale, it integrates the two core functions of angle adjustment and weld throat measurement, ensuring that the measuring device has a compact and small structure.

[0017] The layered layout ensures that the auxiliary ruler will not interfere with the upper weld throat measuring ruler when adjusting its angle along the lower slide rail. Operators can independently fix the auxiliary ruler to the base material angle first, and then independently slide the weld throat measuring ruler to take a reading, avoiding interference between the two operations and improving the smoothness of the measurement process. After measurement, the auxiliary ruler can retract along the lower slide rail to both sides of the main ruler, and the weld throat measuring ruler can be stored in the upper weld throat slide rail. This layered storage method allows each component to fit tightly against the main ruler, further reducing the overall storage volume, while preventing wear caused by mutual compression between components. Furthermore, the weld throat slide rail is located on the upper layer of the slide rail, making it convenient to visually read the weld throat measurement data during measurement.

[0018] Furthermore, the locking mechanism is a knob, which is located at the end of the slide rail. Tightening the knob secures the auxiliary scale to the main scale.

[0019] The knob-type locking mechanism is located at the end of the slide rail. Tightening it directly applies pressure to fix the relative position of the auxiliary scale and the main scale. This design effectively prevents displacement of the auxiliary scale due to vibration or contact during measurement, ensuring a stable and tight fit between the auxiliary scale and the base material of the corner joint, and guaranteeing the accuracy of weld throat and weld leg dimension measurements. Furthermore, the knob operation is simple and direct, requiring no additional tools. Operators can complete the adjustment and locking of the auxiliary scale angle with one hand, significantly reducing the preparation time for measuring a single weld and improving the inspection efficiency at steel structure construction sites.

[0020] Furthermore, a guide groove is provided at the bottom of the slide rail groove, which is concentric with the slide rail groove, and the knob slides in cooperation with the guide groove.

[0021] In this design, the guide groove provides dedicated movement space for the knob, preventing it from getting stuck or jammed when the scale slides along a concentric circle. This design ensures smooth and unobstructed adjustment of the scale angle, allowing for quick and precise fitting of the base material surface at different angles of the corner joint. The dedicated movement space of the guide groove also prevents interference between the knob and other components of the main scale and scale. This design eliminates the need for additional space to accommodate the knob, further optimizing the internal structural layout of the main scale and ensuring the normal functioning of all components without increasing the overall size.

[0022] Furthermore, at least one side of the weld foot measuring ruler is inclined, and the shape of the weld foot groove matches the shape of the weld foot measuring ruler; at least one side of the weld throat measuring ruler is inclined, and the shape of the weld throat groove matches the shape of the weld throat measuring ruler.

[0023] In this design, the inclined structure of the weld leg measuring ruler and the weld throat measuring ruler, matched with the corresponding sliding groove, creates a mechanical limiting effect. This design effectively prevents the measuring ruler from accidentally sliding out of the groove during sliding or measurement, ensuring structural stability during frequent operations on the construction site.

[0024] Furthermore, a positioning protrusion is provided on one side of the ends of the two welding foot measuring rulers, and the positioning protrusion is triangular in shape.

[0025] The triangular positioning protrusion at the end of the weld toe measuring ruler can accurately engage with the weld toe position of the fillet weld. This design allows for quick and accurate location of the measurement reference point, preventing the measuring ruler from sliding or shifting on the weld surface. It ensures accurate contact angle and position between the measuring ruler and the weld, providing a reliable positioning basis for weld toe size measurement.

[0026] The pointed tip of the triangular positioning protrusion can be precisely aligned with the weld toe line of the weld, eliminating gap errors when the end of the measuring ruler contacts the weld. Operators can use the protruding tip as a reference to accurately read the scale data, effectively improving the accuracy of weld leg size measurement and avoiding reading errors caused by contact position deviations.

[0027] Furthermore, the end of the weld throat measuring ruler is tapered.

[0028] The tapered design at the end of the weld throat measuring ruler allows for precise alignment with the center position of the weld throat in fillet welds. This design quickly establishes a reference point for weld throat dimension measurement, preventing positional shifts when the measuring ruler end contacts the weld, thus providing a reliable basis for accurate weld throat dimension measurement.

[0029] Furthermore, the measurement angle formed by the extension and retraction of the two auxiliary scales along the concentric circular trajectory of the main scale is between 45° and 125°.

[0030] The measurement angle range of 45° to 125° in this solution can fully cover the common included angle range of 60° to 120° for corner joints in steel structure construction. This design can not only measure traditional 90° vertical corner joints, but also accurately adapt to the fillet welds of acute and obtuse angle corner joints, solving the limitation of the HJC series weld gauge that can only measure 90° corner joints.

[0031] This solution utilizes a single measuring instrument to meet the measurement needs of most corner joints, eliminating the need for multiple measuring tools for welds at different angles. Operators no longer need to frequently change instruments, significantly reducing measurement preparation time and improving the inspection efficiency at steel structure welding construction sites. Previously, the industry lacked efficient instruments for measuring non-90° corner joint welds; this measurement angle range design fills this gap. The extended and retracting scale along a concentric circular trajectory ensures a close fit with the base material, providing a reliable benchmark for measuring weld throat and weld leg dimensions, thus improving the accuracy and rigor of non-destructive testing data. Attached Figure Description

[0032] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0033] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a wide-area fillet weld measuring device according to the present invention;

[0034] Figure 2 This is an exploded structural diagram of an embodiment of a wide-area fillet weld measuring device according to the present invention;

[0035] Figure 3 This is a schematic diagram of the main scale in an embodiment of a wide-area fillet weld measuring device of the present invention;

[0036] Figure 4 This is a side view of the main scale in an embodiment of a wide-area fillet weld measuring instrument of the present invention;

[0037] Figure 5 This is a schematic diagram of the attached ruler and slide rail of an embodiment of a wide-area fillet weld measuring device of the present invention;

[0038] Figure 6 This is a side view of the scale, slide rail, and knob of an embodiment of a wide-area fillet weld measuring instrument according to the present invention;

[0039] Figure 7 This is a schematic diagram of the weld foot measuring ruler according to an embodiment of the wide-area fillet weld measuring device of the present invention;

[0040] Figure 8 This is a schematic diagram of the weld throat measuring ruler according to an embodiment of the wide-area fillet weld measuring device of the present invention;

[0041] Figure 9 This is a top view of a weld leg measuring ruler according to an embodiment of a wide-area fillet weld measuring device of the present invention;

[0042] Figure 10 This is a top view of the weld throat measuring ruler of an embodiment of a wide-area fillet weld measuring device according to the present invention;

[0043] Figure 11 This is a schematic diagram showing the alignment of the measurement reference line on the weld leg measuring ruler with the scale line on the attached ruler in an embodiment of the wide-area fillet weld measuring instrument of the present invention.

[0044] Figure 12 This is a schematic diagram illustrating the measurement status of an obtuse angle fillet weld in an embodiment of a wide-area fillet weld measuring device of the present invention;

[0045] Figure 13 This is a schematic diagram illustrating the state of measuring an acute angle fillet weld in an embodiment of a wide-area fillet weld measuring device of the present invention;

[0046] Figure 14 This is a schematic diagram of the fillet weld measurement structure for 90° vertical corner joints and obtuse corner joints of HJC weld gauges in the prior art.

[0047] The attached diagram shows the markings and corresponding component names:

[0048] Main scale 1, slide rail groove 101, weld throat slide rail 102, guide groove 103;

[0049] Attached ruler 2, slide rail 201, knob 202, welded foot slide groove 203;

[0050] 3. Weld throat measuring ruler; 4. Weld foot measuring ruler; 5. Positioning protrusion; 6. Measuring baseline. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of the present invention are only used to explain the present invention and are not intended to limit the present invention.

[0052] like Figures 1-2 As shown, this embodiment provides a wide-area fillet weld measuring instrument, including a main scale 1, two auxiliary scales 2, two weld leg measuring scales 4, and a weld throat measuring scale 3. The two auxiliary scales 2 are located on both sides of the main scale 1, and the two auxiliary scales 2 slide and extend in cooperation with the main scale 1 along the concentric circular trajectory of the main scale 1, as shown. Figure 1 The centers of the two attached rulers coincide with those of the main ruler.

[0053] The two weld foot measuring rulers 4 are radially slidingly engaged with the two auxiliary rulers 2 respectively, and the weld throat measuring ruler 3 is radially slidingly engaged with the main ruler 1; a locking mechanism is provided between the auxiliary ruler 2 and the main ruler 1, which is used to fix the relative position of the main ruler 1 and the auxiliary ruler 2 after adjustment.

[0054] In this embodiment, both the main ruler 1 and the auxiliary ruler 2 are fan-shaped structures, with their centers coinciding. The main ruler 1 has two concentrically arranged slide rail grooves 101 with different radii, allowing the sliding trajectories of the two auxiliary rulers 2 to intersect and avoid interference. In this embodiment, the slide rail grooves 101 are arc-shaped, and each of the two auxiliary rulers 2 has a slide rail 201 connected to one side. The shape of the slide rail 201 matches the shape of the slide rail groove 101, and the two slide rails 201 slide in an arc shape with the two slide rail grooves 101 respectively.

[0055] like Figure 2 As shown, a weld throat groove 102 is also provided on the main scale 1 along its radial direction, and the weld throat groove 102 is located on the line of symmetry of the main scale 1. The weld throat measuring scale 3 is in sliding fit with the weld throat groove 102. Two auxiliary scales 2 are provided with weld foot grooves 203 along their radial direction, and two weld foot measuring scales 4 are in sliding fit with the two weld foot grooves 203 respectively.

[0056] like Figure 1 As shown, in this embodiment, the measurement angle range formed by the extension and retraction of the two auxiliary rulers 2 along the concentric circular trajectory of the main ruler 1 is between 45° and 125°. In this embodiment, the main ruler 1 and auxiliary ruler 2 are designed and laid out in a concentric circle. The auxiliary ruler 2 extends to both sides to form the measurement range. In steel structure construction, the angle between the base materials on both sides of the corner joint is generally between 60° and 120°. The measuring ruler is designed for this range. The sliding rail 201 on the auxiliary ruler 2 extends and retracts along the sliding rail groove 101 inside the main ruler 1 along a concentric circular trajectory to form a measurement angle between 45° and 125°. The adjustability needs to meet the high adaptability of the wide-area angle and the large range coverage. It has the function of measuring the weld throat size and weld leg size of various angles within this range at one time.

[0057] In one embodiment, combined Figure 1 , Figure 2 As shown, in this embodiment, scale lines are provided on one side of the weld throat groove 102 and one side of the weld foot groove 203, in conjunction with... Figure 7 and Figure 8 As shown, both the weld throat measuring ruler 3 and the weld foot measuring ruler 4 are equipped with measuring reference lines 5 that correspond to the scale lines for reading.

[0058] like Figure 1 and Figure 2As shown, in this embodiment, the scale lines are set on the auxiliary ruler 2 and the main ruler 1, and are located on one side of the weld throat groove 102 and the weld foot groove 203. The auxiliary ruler 2 and the main ruler 1 are provided with a row of engraved scale lines for reading when measuring the dimensions of the weld throat and weld foot. The size data is obtained by comparing the scale lines with the measuring reference line 5 on the weld throat measuring ruler 3 and the weld foot measuring ruler 4. In this embodiment, the scale range of the scale lines is 0 to 20, and its range is 0 to 20 mm.

[0059] The measuring reference line 5 on the weld throat measuring ruler 3 and the weld foot measuring ruler 4 changes relative to the scale lines on the main ruler 1 and the auxiliary ruler 2, respectively, to complete the reading. Figure 1 As shown, when the first line of the measurement baseline is aligned, the reading is 0; each subsequent division represents an increase of 1mm. Figure 11 As shown, at this time, the measurement reference line 5 on the weld leg measuring ruler 4 is aligned with the third scale line on the attached ruler 2, and the weld leg measurement data at this time is 3mm.

[0060] In one embodiment, such as Figure 3 and Figure 4 As shown, in this embodiment, the weld throat groove 102 is located on the upper layer of the slide rail groove 101, thus dividing the main scale 1 into an upper and lower structure. The lower structure mainly provides the slide rail groove 101 space and fastening and locking base for the two auxiliary scales 2 on the left and right, while the upper structure mainly provides the weld throat measuring scale 3 required for weld throat measurement with the weld throat groove 102 and scale lines, so that the weld throat groove 102 and the slide rail groove 101 are staggered, avoiding interference between the sliding of the weld throat measuring scale 3 and the two auxiliary scales 2.

[0061] In one embodiment, combined Figure 1 and Figure 2 as well as Figure 5 and Figure 6 As shown, in this embodiment, the locking mechanism is a knob 202, which is located at the end of the slide rail 201. In this embodiment, the knob 202 is threadedly connected to the slide rail 201. By tightening the knob 202, the attached scale 2 is secured to the main scale 1. Thus, after adjusting the unfolding angle of the two attached scales 2, the position of the attached scales 2 is fixed by tightening the knob 202, which facilitates accurate measurement operations.

[0062] In one embodiment, such as Figure 3 and Figure 4 As shown, the bottom of the slide rail groove 101 is provided with a guide groove 103 concentrically arranged with the slide rail groove 101, and the knob 202 slides in cooperation with the guide groove 103. That is, the rod of the knob 202 can slide in an arc within the guide groove 103 as the slide rail 201 moves. After the angle position of the attached ruler 2 is adjusted, the attached ruler 2 can be fixed by tightening the knob 202. The guide groove 103 provides space for the movement of the knob 202 and has a guiding function.

[0063] In one embodiment, combined Figure 7 and Figure 9 As shown, at least one side of the weld leg measuring ruler 4 is inclined. In this embodiment, one side of the weld leg measuring ruler 4 is inclined, as shown... Figure 6 As shown, the shape of the welding foot groove 203 matches the shape of the welding foot measuring ruler 4. In this embodiment, one side of the groove of the welding foot groove 203 is inclined inward by 10°, and the inclination angle of the welding foot measuring ruler 4 is also 10°. After the welding foot measuring ruler 4 and the welding foot groove 203 are fitted together, the inclined side of the welding foot measuring ruler 4 matches the inclined surface of the welding foot groove 203, which can prevent the welding foot measuring ruler 4 from accidentally falling off.

[0064] Combination Figure 8 and Figure 10 As shown, at least one side of the welding throat measuring ruler 3 is inclined. In this embodiment, both sides of the welding throat measuring ruler are inclined to each other, and the inclination angle is 10°, forming a structure with a trapezoidal cross section. The shape of the welding throat groove 102 matches the shape of the welding throat measuring ruler 3, that is, the welding throat groove 102 is a trapezoidal groove structure. After the welding throat measuring ruler 3 and the welding throat groove 102 are fitted together, they are not easy to fall off.

[0065] In one embodiment, such as Figure 7 As shown, in this embodiment, a positioning protrusion 401 is provided on one side of the end of the two welding foot measuring rulers 4. The positioning protrusion 401 is triangular in shape, as shown in the figure. Figure 2 As shown, the positioning protrusions 401 on the two weld foot measuring rulers 4 are arranged opposite to each other, and the positioning protrusions 401 at the ends of the two weld foot measuring rulers 4 can play a positioning role during the measurement process.

[0066] In one embodiment, such as Figure 8 As shown, the end of the weld throat measuring ruler 3 is tapered, and in this embodiment, the side of the weld throat measuring ruler 3 that contacts the weld is a plane.

[0067] The specific implementation process is as follows:

[0068] The measuring device of this invention can complete circumferential motion with the center as the reference point to adapt to corner joints of various angles within the range of 45° to 125°, and can provide a basis for measuring weld throat and weld leg data, such as... Figure 12 As shown, a case study of obtuse angle fillet weld measurement, and as... Figure 13 The image shows a case study of measuring an acute-angle fillet weld.

[0069] In practical use, place the measuring instrument on the fillet weld to be inspected, and evenly open the auxiliary ruler 2 to both sides until it is parallel to the plates on both sides of the weld. Then, tighten the back knob 202 to fix the position of the auxiliary ruler 2. Extend the weld throat measuring ruler 3 and weld foot measuring ruler 4 respectively, and place the entire measuring instrument against the plates on both sides of the weld to make them in close contact. The weld throat measuring ruler 3 and weld foot measuring ruler 4 are pushed inward by the weld. At this time, read the position of the measuring reference line 5 on the weld throat measuring ruler 3 and weld foot measuring ruler 4 to obtain the weld throat and weld foot size data.

[0070] This invention:

[0071] 1) Place the wide-area fillet weld measuring instrument at the workpiece to be inspected, and quickly adjust the extension and retraction of the attached ruler 2 according to the corner joint angle of the fillet weld of the workpiece to make it fit against the surface of the base material of the joint to achieve the same current angle between the two.

[0072] 2) After fixing the auxiliary ruler 2, slide the main ruler 1 and the weld throat measuring ruler 3 and weld foot measuring ruler 4 on the auxiliary ruler 2 to the relative position. This allows for quick reading of the weld throat and weld foot data of the fillet weld. The measurement range is 0 to 20 mm, with each division representing 1 mm.

[0073] 3) After the measurement is completed, the two attached rulers 2 can be folded up, which can greatly reduce the storage volume of the measuring device and achieve a compact and portable effect. During use, the attached ruler 2 can be extended, and the slide rail 201 of the attached ruler 2 can be extended or retracted as needed. After adjusting the measurement angle, the position of the slide rail 201 on the attached ruler 2 can be fixed by tightening the knob 202. The measuring ruler can then be used to complete the data measurement.

[0074] 4) The wide-area fillet weld measuring instrument is used for measuring weld data of fillet joints. The design range is from 45° to 125°, which can cover the measurement of weld throat and weld leg of most fillet joints in steel structure welding construction.

[0075] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement 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 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 wide-area fillet weld measuring instrument, characterized in that, It includes a main scale, two auxiliary scales, two weld foot measuring scales and one weld throat measuring scale. The two auxiliary scales are located on both sides of the main scale, and the two auxiliary scales slide and extend with the main scale along the concentric circular trajectory of the main scale. The two weld foot measuring rulers are respectively radially slidingly engaged with the two auxiliary rulers, and the weld throat measuring ruler is radially slidingly engaged with the main ruler; a locking mechanism is provided between the auxiliary ruler and the main ruler, and the locking mechanism is used to fix the relative position of the main ruler and the auxiliary ruler after adjustment.

2. The wide-area fillet weld measuring instrument according to claim 1, characterized in that, Both the main scale and the auxiliary scale are fan-shaped structures, and the main scale has two concentric slide rail grooves. The slide rail grooves are arc-shaped grooves. Each of the two auxiliary scales is connected to a slide rail on one side, and the two slide rails are respectively in arc-shaped sliding fit with the two slide rail grooves. The main ruler is provided with a weld throat groove along its radial direction, and the weld throat groove is located on the line of symmetry of the main ruler. The weld throat measuring ruler slides in conjunction with the weld throat groove. The two auxiliary rulers are provided with weld foot grooves along their radial direction, and the two weld foot measuring rulers slide in conjunction with the two weld foot grooves respectively.

3. A wide-area fillet weld measuring instrument according to claim 2, characterized in that, Both the weld throat groove and the weld foot groove are provided with scale lines on one side, and both the weld throat measuring ruler and the weld foot measuring ruler are provided with measuring reference lines that correspond to the scale lines for reading.

4. A wide-area fillet weld measuring instrument according to claim 3, characterized in that, The welding throat groove is located on the upper layer of the slide rail groove.

5. A wide-area fillet weld measuring instrument according to claim 4, characterized in that, The locking mechanism is a knob, which is located at the end of the slide rail. Tightening the knob secures the auxiliary scale to the main scale.

6. A wide-area fillet weld measuring instrument according to claim 5, characterized in that, The bottom of the slide rail groove is provided with a guide groove that is concentric with the slide rail groove, and the knob slides in conjunction with the guide groove.

7. A wide-area fillet weld measuring instrument according to claim 2, characterized in that, The weld foot measuring ruler is inclined on at least one side, and the shape of the weld foot groove matches the shape of the weld foot measuring ruler; the weld throat measuring ruler is inclined on at least one side, and the shape of the weld throat groove matches the shape of the weld throat measuring ruler.

8. A wide-area fillet weld measuring instrument according to claim 1, characterized in that, The two welding foot measuring rulers have a positioning protrusion on one side of their ends, and the positioning protrusion is triangular in shape.

9. A wide-area fillet weld measuring instrument according to claim 1, characterized in that, The end of the welding throat measuring ruler is tapered.

10. A wide-area fillet weld measuring instrument according to any one of claims 1-9, characterized in that, The measuring angle formed by the extension and retraction of the two auxiliary scales along the concentric circular trajectory of the main scale is between 45° and 125°.

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