Device and method for measuring internal welding eccentricity of spiral submerged arc welding pipe

Abstract

The invention provides a spiral submerged arc welding pipe inner welding eccentricity measuring device and method.The eccentricity measuring device comprises an adjusting support, a horizontal ruler, a laser ground wire positioner and a graduated scale, the horizontal ruler is arranged on the adjusting support, a horizontal adjusting and positioning device is arranged on the adjusting support, the laser ground wire positioner is in sliding connection with the adjusting support, and the graduated scale is arranged on the laser ground wire positioner. The graduated scale is arranged on the adjusting support and located on the projection side of the laser ground wire positioner, and ball bearings are arranged at the four corners of the adjusting support. The laser ground wire positioner is installed on the first adjusting support connecting rod, the transverse movement adjusting function is achieved, and measurement is convenient; a laser ground wire positioner is adopted, so that the measurement process is convenient and fast; a ball bearing is arranged at the end part of the adjusting bracket, so that the measuring device can flexibly slide along the inner wall of the steel pipe to automatically find the level when being in the steel pipe; after the level is found, the level ruler is located at the horizontal position through the level adjusting and positioning device, and the leveled position is fixed.

Description

Technical Field

[0001] The invention belongs to the technical field of spiral submerged arc welded pipe production, and in particular relates to a device and method for measuring the internal welding eccentricity of a spiral submerged arc welded pipe. Background Art

[0002] During the production of spiral submerged arc welded pipes, the distance that the weld point deviates from the vertical center line of the steel pipe is the eccentricity. The eccentricity has a great influence on the internal and external quality of the weld and is an important measurement data in the production of spiral submerged arc welded pipes.

[0003] For the measurement of internal welding eccentricity, the commonly used method is that the measurement personnel drill into the spiral submerged arc welded pipe before production, use a level ruler to mark the intersection of two vertical center lines and the inner surface of the steel pipe, draw the projection of the vertical center line of the spiral submerged arc welded pipe on the inner surface of the steel pipe with a line between the two points, and then use a ruler to measure the distance between the internal welding wire and the projection of the vertical center line, which is the internal welding eccentricity. This measurement method is difficult to read data, has low measurement accuracy, is time-consuming, and has high labor intensity.

[0004] The patent number is 201821751916.0, and the patent name is "Spiral Submerged Arc Welding Pipe External Welding Machine Head Measuring Gauge". The patent discloses a measuring gauge including two positioning base scales, two connecting rods, an arc base scale and a level gauge. The two positioning base scales are positioned at an angle against the outer circle of the spiral submerged arc welded pipe. Each positioning base scale is provided with a distance scale. The arc base scale is connected to the positioning base scale through a connecting rod. The arc base scale is provided with an arc scale for measuring the inclination of the welding wire. The eccentricity of the weld point, the positive inclination angle of the front wire / rear wire, and the side inclination angle of the front wire / rear wire can be obtained in real time, and the adjustment does not rely on the operating experience of the operator, which ensures the accuracy of the above process parameters, improves the standardization of the external welding of spiral submerged arc welded pipes, and greatly improves the weld quality and work efficiency. However, this measuring tool can only measure the eccentricity of the external welding spot (convex surface), but cannot measure the eccentricity of the internal welding spot (concave surface). In addition, it cannot automatically find the level during measurement. The manual measurement error is large, the measurement is inconvenient, and the measurement efficiency is low. Summary of the invention

[0005] The purpose of the present invention is to provide a device for measuring the internal welding eccentricity of a spiral submerged arc welded pipe, so as to overcome the above-mentioned technical problems in the prior art.

[0006] Another object of the present invention is to provide a method for measuring the eccentricity of the internal weld of a spiral submerged arc welded pipe, which effectively improves the measurement accuracy and improves the production quality.

[0007] To this end, the technical solution provided by the present invention is as follows: A device for measuring the internal welding eccentricity of a spiral submerged arc welded pipe comprises an adjusting bracket, a level ruler, a laser ground line locator and a scale ruler, wherein the level ruler is arranged on the adjusting bracket, a horizontal adjustment positioning device is arranged on the adjusting bracket, the laser ground line locator is slidably connected to the adjusting bracket, the scale ruler is arranged on the adjusting bracket and is located on the projection side of the laser ground line locator, and ball bearings are arranged at the four corners of the adjusting bracket.

[0008] The adjustment bracket includes a connecting rod 1, a connecting rod 2 and a cross plate, wherein the connecting rod 1 and the connecting rod 2 are arranged in parallel, the cross plate is arranged between the connecting rod 1 and the connecting rod 2, there are two cross plates and they form a rectangular structure with the connecting rod 1 and the connecting rod 2, and the ball bearings are respectively arranged at both ends of the connecting rod 1 and the connecting rod 2; A rib plate is provided between the two horizontal plates. The rib plate is parallel to the horizontal plate and there are two of them. The length of the rib plate is greater than the length of the horizontal plate. One end of the two rib plates is fixedly connected to the second connecting rod, and the other end is respectively fixedly connected to the two ends of the scale. The first connecting rod is fixedly connected to the rib plate.

[0009] The laser ground line locator is slidably connected to a connecting rod through a moving block and a pressure plate. The laser ground line locator is fixed to the moving block through a locking bolt. The pressure plate is arranged on a lower end surface of the connecting rod, and the moving block is arranged on an upper end surface of the connecting rod. The pressure plate and the moving block are connected by screws.

[0010] The horizontal adjustment positioning device comprises positioning bolts, which are symmetrically arranged on the two rib plates and are located between the level ruler and the second connecting rod.

[0011] The two ends of the level ruler are fixed on the horizontal plate, and a level bubble is arranged on the upper end surface of the level ruler.

[0012] The zero position of the scale coincides with the center line of the adjustment bracket.

[0013] A method for measuring the eccentricity of internal welding of a spiral submerged arc welded pipe, using a device for measuring the eccentricity of internal welding of a spiral submerged arc welded pipe, comprises the following steps: Step 1) Place the eccentricity measuring device in the steel pipe, and adjust the ball bearings at the four corners of the bracket to slide automatically against the inner wall of the steel pipe to find the horizontal position; Step 2) Using the horizontal adjustment positioning device, the level ruler provided on the adjustment bracket is placed in a horizontal position, and the adjustment bracket is positioned; Step 3) Turn on the laser ground line locator, slide the moving block to adjust the position of the laser ground line locator so that the ground line projected by the laser ground line locator coincides with the welding wire of the internal welding gun. At this time, the reading of the laser line projected on the scale is the internal welding eccentricity.

[0014] Before use, calibrate the eccentricity measuring device; During calibration, when the four ball bearings are located on the same horizontal plane, the level bubble is at the center of the spirit level, the zero position of the scale is located on the geometric center line in the length direction of the adjustment bracket, and the ground line projected by the laser ground line locator is parallel to the geometric center line.

[0015] The beneficial effects of the present invention are: The spiral submerged arc welded pipe internal weld eccentricity measuring device provided by the present invention has a lateral adjustment function by installing a laser ground line locator on a connecting rod of an adjustment bracket, thereby facilitating measurement; the use of a laser ground line locator ensures that the measurement process is convenient and quick; a ball bearing is arranged at the end of the adjustment bracket, so that the measuring device can automatically find the level by sliding flexibly along the inner wall of the steel pipe when it is in the steel pipe; after finding the level, the level ruler fixed on the adjustment bracket is placed in a horizontal position through a horizontal adjustment positioning device, and the leveled position is fixed.

[0016] The adjustment bracket of the present invention is composed of a connecting rod and a rib plate overlapped assembly, and each component is connected by double rivets, which reduces the material of the frame, ensures that the mechanism is light, easy to operate, and reduces the behavior error. A scale is set on one side of the adjustment bracket, and the zero position of the scale is overlapped with the center line of the adjustment bracket, so that it has a zero position marking function, which is convenient for measuring the eccentric distance of the internal welding point. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of an implementation method of the present invention; Figure 2 Schematic diagram of welding eccentricity measurement principle of the present invention; Figure 3 This is an implementation diagram of the eccentricity measurement of the present invention; Figure 4 It is a schematic diagram of the welding wire of the internal welding gun of the present invention; Figure 5 It is a schematic diagram of the measuring device of the present invention in a steel pipe.

[0018] In the figure: 1. Adjustment bracket; 1-1. Ball bearing; 1-2. Positioning bolt; 1-3. Moving block; 1-4. Pressure plate; 1-5. Locking bolt; 1-6. Double rivet; 1-7. Connecting rod one; 1-8. Rib plate; 1-9. Connecting rod two; 1-10. Cross plate; 2. Level ruler; 2-1. Level bubble; 2-2. Screw; 3. Laser ground line locator; 3-1. Switch; 3-2. Lens; 3-3. Laser line; 3-4. Ground line; 4. Scale; 4-1. Zero position; 5. Internal welding gun; 5-1. Welding wire; 6. Steel pipe. Implementation

[0019] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0020] The exemplary embodiments of the present invention are now described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0021] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings. Example

[0022] The present invention provides a device for measuring the internal welding eccentricity of a spiral submerged arc welded pipe. Figure 1 , Figure 3 As shown, it includes an adjusting bracket 1, a level 2, a laser ground line locator 3 and a scale 4, the level 2 is arranged on the adjusting bracket 1, the adjusting bracket 1 is provided with a horizontal adjustment positioning device, the laser ground line locator 3 is slidably connected to the adjusting bracket 1, the scale 4 is arranged on the adjusting bracket 1 and is located on the projection side of the laser ground line locator 3, and the four corners of the adjusting bracket 1 are provided with ball bearings 1-1.

[0023] Working principle: like Figure 4 , Figure 5 As shown, the eccentricity measuring device is placed inside the steel pipe 6, and the four bearings at the end of the bracket are adjusted to be close to the inner wall of the steel pipe 6 to automatically slide to find the horizontal position. The horizontal adjustment positioning device makes the level ruler 2 set on the adjustment bracket in a horizontal position and positions the adjustment bracket. Press the switch 3-1 of the laser ground line locator 3 to project the laser line 3-3, and slide the moving block 1-3 to adjust the position of the laser ground line locator 3. When the ground line 3-4 projected by the laser ground line locator 3 coincides with the welding wire 5-1 of the internal welding gun 5, the reading of the laser line 3-3 projected on the scale 4 is the internal welding eccentricity. Figure 2 shown.

[0024] The spiral submerged arc welded pipe internal weld eccentricity measuring device provided by the present invention has a lateral adjustment function by installing a laser ground line locator 3 on the adjusting bracket connecting rod, which is convenient for measurement; the laser ground line locator 3 is adopted to ensure that the measuring process is convenient and quick; a ball bearing 1-1 is arranged at the end of the adjusting bracket, so that the measuring device can automatically find the level by sliding flexibly along the inner wall of the steel pipe 6 when it is in the steel pipe 6; after finding the level, the level ruler 2 fixedly arranged on the adjusting bracket is placed in a horizontal position through the horizontal adjustment positioning device, and the leveled position is fixed. Example

[0025] Based on Example 1, this embodiment provides a device for measuring the eccentricity of the internal weld of a spiral submerged arc welded pipe. Figure 1 As shown, the adjustment bracket 1 includes a connecting rod 1-7, a connecting rod 2-1-9 and a transverse plate 1-10, the connecting rod 1-7 and the connecting rod 2-1-9 are arranged in parallel, the transverse plate 1-10 is arranged between the connecting rod 1-7 and the connecting rod 2-1-9, the transverse plates 1-10 are two and form a rectangular structure with the connecting rod 1-7 and the connecting rod 2-1-9, and the ball bearings 1-1 are respectively arranged at both ends of the connecting rod 1-7 and the connecting rod 2-1-9; A rib plate 1-8 is provided between the two transverse plates 1-10. The rib plate 1-8 is parallel to the transverse plate 1-10 and there are two of them. The length of the rib plate 1-8 is greater than that of the transverse plate 1-10. One end of the two rib plates 1-8 is fixedly connected to the connecting rod 2 1-9, and the other end is respectively fixedly connected to the two ends of the scale 4. The connecting rod 1 1-7 is fixedly connected to the rib plate 1-8.

[0026] The adjustment bracket is composed of a cross plate 1-10, connecting rods (including connecting rod one 1-7 and connecting rod two 1-9), and a rib plate 1-8. The cross plate 1-10 and connecting rod 1-7, the cross plate 1-10 and connecting rod 1-9, the rib plate 1-8 and the scale 4, the rib plate 1-8 and connecting rod two 1-9, and the rib plate 1-8 and connecting rod one 1-7 are all connected by double rivets 1-6, which reduces the material used for the frame, ensures that the mechanism is light, easy to operate, and reduces behavioral errors. Example

[0027] On the basis of Example 2, this embodiment provides a device for measuring the eccentricity of the internal weld of a spiral submerged arc welded pipe, wherein the laser ground line locator 3 is slidably connected to the connecting rod 1-7 through a moving block 1-3 and a pressure plate 1-4, and the laser ground line locator 3 is fixed to the moving block 1-3 through a locking bolt 1-5, and the pressure plate 1-4 is arranged on the lower end surface of the connecting rod 1-7, and the moving block 1-3 is arranged on the upper end surface of the connecting rod 1-7, and the pressure plate 1-4 and the moving block 1-3 are connected by screws.

[0028] like Figure 3As shown, the laser ground line locator 3 is fixed on the moving block 1-3 of the adjustment bracket by the locking bolt 1-5 on the moving block 1-3, a thread hole is provided on the moving block 1-3, a through hole is provided on the pressure plate 1-4, the screw passes through the through hole on the pressure plate 1-4 and is connected with the thread hole on the moving block 1-3, and the moving block 1-3 is set on the connecting rod 1-7 so that the moving block 1-3 can be flexibly moved left and right along the connecting rod 1-7. Example

[0029] Based on Example 2, this example provides a device for measuring the eccentricity of the internal weld of a spiral submerged arc welded pipe, wherein the horizontal adjustment positioning device includes a positioning bolt 1-2, wherein the positioning bolt 1-2 is symmetrically arranged on the two ribs 1-8, and the positioning bolt 1-2 is located between the level ruler 2 and the connecting rod 1-9.

[0030] like Figure 1 As shown, two positioning bolts 1-2 are symmetrically arranged on both sides of the adjustment bracket. When the four bearings at the end of the adjustment bracket automatically slide against the inner wall of the steel pipe 6 to find the level, the positioning bolts 1-2 are fine-tuned to make the level ruler 2 fixed on the adjustment bracket in a horizontal position and fix the leveled position. Example

[0031] On the basis of Example 2, this embodiment provides a device for measuring the eccentricity of the internal weld of a spiral submerged arc welded pipe. The two ends of the level ruler 2 are fixed to the horizontal plate 1-10 by screws 2-2, and a level bubble 2-1 is provided on the upper end surface of the level ruler 2.

[0032] During calibration, when the four ball bearings 1 - 1 are located at the same horizontal plane, the level bubble 2 - 1 is located at the center of the level ruler 2 . Example

[0033] On the basis of Example 1, this embodiment provides a device for measuring the internal weld eccentricity of a spiral submerged arc welded pipe, wherein the zero position 4 - 1 of the scale 4 coincides with the center line of the adjustment bracket.

[0034] like Figure 3 As shown, a scale 4 is provided on one side of the adjustment bracket, and the zero position 4-1 of the scale 4 is coincident with the center line of the adjustment bracket, thereby having a zero position marking function, facilitating the measurement of the eccentric distance of the internal welding spot.

[0035] When the bracket is adjusted to a horizontal position, the switch 3-1 of the laser ground line locator 3 is pressed, and a long straight laser line 3-3 is projected from the lens 3-2 at a wide angle, and is projected onto the inner wall of the steel pipe 6 to form a ground line 3-4. When the laser line 3-3 is projected onto the zero position 4-1 of the scale 4, the ground line 3-4 coincides with the axial center line of the horizontal plane of the steel pipe 6. At this time, the ground line 3-4 is also on the vertical center line 0 of the steel pipe 6, and the reading of the measuring device is zero. Figure 5 shown. Example

[0036] This embodiment provides a device for measuring the eccentricity of the internal weld of a spiral submerged arc welded pipe. Figure 1 As shown, it includes an adjustment bracket, a level 2, a laser ground line locator 3, and a scale 4. The laser ground line locator 3 is slidably connected to the adjustment bracket through a moving block 1-3, the level 2 is fixed to the adjustment bracket through a screw 2-2, and a scale 4 is connected to one side of the adjustment bracket by a rivet, and the scale 4 is arranged on the laser projection side of the laser ground line locator 3. The zero position 4-1 of the scale 4 coincides with the center line of the adjustment bracket, and has the function of marking the zero position 4-1.

[0037] The adjustment bracket includes a connecting rod 1-7, a connecting rod 2-1-9 and a horizontal plate 1-10, the connecting rod 1-7 and the connecting rod 2-1-9 are arranged in parallel, the horizontal plate 1-10 is arranged between the connecting rod 1-7 and the connecting rod 2-1-9, there are two horizontal plates 1-10 and they form a rectangular structure with the connecting rod 1-7 and the connecting rod 2-1-9. Four ball bearings 1-1 and two positioning bolts 1-2 are arranged on the adjustment bracket. A thread hole is provided on the moving block 1-3, and a through hole is provided on the pressure plate 1-4. The screw passes through the through hole on the pressure plate 1-4 and is connected with the thread hole on the moving block 1-3. The moving block 1-3 is set on the connecting rod 1-7. The moving block 1-3 can slide flexibly on the connecting rod 1-7. A locking bolt 1-5 is provided on the moving block 1-3. The locking bolt 1-5 fixes the laser ground locator 3 on the moving block 1-3. The connecting rod 1-7, the rib plate 1-8 and the scale 4 are overlapped and combined and fixed by double rivets 1-6.

[0038] The adjustment bracket of the present invention adopts a steel structure overlap combination, and each structural member is connected by double rivets 1-6, which reduces the material used for the frame, ensures that the mechanism is light, easy to operate, and reduces the behavior error. The measuring device efficiently utilizes the conventional and effective level ruler 2 and the laser ground line locator 3, making the measurement work and reading simple and easy to understand, and further improving the work efficiency. It fills the gap of the spiral submerged arc welded pipe internal welding eccentricity measurement tool, can realize the production of standard measuring instruments, and has high promotion value. Example

[0039] This embodiment provides a method for measuring the eccentricity of the internal weld of a spiral submerged arc welded pipe, using a device for measuring the eccentricity of the internal weld of a spiral submerged arc welded pipe, comprising the following steps: Step 1) Place the eccentricity measuring device in the steel pipe 6, and adjust the ball bearings 1-1 at the four corners of the bracket to slide against the inner wall of the steel pipe 6 to find the horizontal position; Step 2) Using the horizontal adjustment positioning device, the level ruler 2 provided on the adjustment bracket is placed in a horizontal position, and the adjustment bracket is positioned; Step 3) Turn on the laser ground line locator 3, slide the moving block 1-3 to adjust the position of the laser ground line locator 3, so that the ground line 3-4 projected by the laser ground line locator 3 coincides with the welding wire 5-1 of the inner welding gun 5. At this time, the reading of the laser line 3-3 projected on the scale 4 is the inner welding eccentricity. Figure 4 , Figure 5 shown.

[0040] Before use, calibrate the eccentricity measuring device; During calibration, when the four ball bearings 1-1 are located on the same horizontal plane, the level bubble 2-1 is at the center of the level ruler 2, the zero position 4-1 of the scale 4 is located on the geometric center line in the length direction of the adjustment bracket, and the ground line 3-4 projected by the laser ground line locator 3 is parallel to the geometric center line.

[0041] The above examples are merely illustrative of the present invention and do not constitute a limitation on the protection scope of the present invention. All designs that are the same or similar to the present invention fall within the protection scope of the present invention.

Claims

1. A device for measuring the eccentricity of internal welding of spiral submerged arc welded pipes. Features: It includes an adjustment bracket, a level, a laser ground line locator and a scale. The level is arranged on the adjustment bracket. The adjustment bracket is provided with a horizontal adjustment positioning device. The laser ground line locator is slidably connected to the adjustment bracket. The scale is arranged on the adjustment bracket and is located on the projection side of the laser ground line locator. Ball bearings are provided at the four corners of the adjustment bracket.

2. A spiral submerged arc welded pipe internal welding eccentricity measuring device according to claim 1, Features: The adjustment bracket includes a connecting rod 1, a connecting rod 2 and a cross plate, wherein the connecting rod 1 and the connecting rod 2 are arranged in parallel, the cross plate is arranged between the connecting rod 1 and the connecting rod 2, there are two cross plates and they form a rectangular structure with the connecting rod 1 and the connecting rod 2, and the ball bearings are respectively arranged at both ends of the connecting rod 1 and the connecting rod 2; A rib plate is provided between the two horizontal plates. The rib plate is parallel to the horizontal plate and there are two of them. The length of the rib plate is greater than the length of the horizontal plate. One end of the two rib plates is fixedly connected to the second connecting rod, and the other end is respectively fixedly connected to the two ends of the scale. The first connecting rod is fixedly connected to the rib plate.

3. A spiral submerged arc welded pipe internal welding eccentricity measuring device according to claim 2, Features: The laser ground line locator is slidably connected to a connecting rod through a moving block and a pressure plate. The laser ground line locator is fixed to the moving block through a locking bolt. The pressure plate is arranged on a lower end surface of the connecting rod, and the moving block is arranged on an upper end surface of the connecting rod. The pressure plate and the moving block are connected by screws.

4. A spiral submerged arc welded pipe internal welding eccentricity measuring device according to claim 2, Features: The horizontal adjustment positioning device comprises positioning bolts, which are symmetrically arranged on the two rib plates and are located between the level ruler and the second connecting rod.

5. The device for measuring the internal welding eccentricity of a spiral submerged arc welded pipe according to claim 2, Features: The two ends of the level ruler are fixed on the horizontal plate, and a level bubble is arranged on the upper end surface of the level ruler.

6. A device for measuring the internal welding eccentricity of a spiral submerged arc welded pipe according to any one of claims 1 to 5, Features: The zero position of the scale coincides with the center line of the adjustment bracket.

7. A method for measuring the eccentricity of internal welds in a spiral submerged arc welded pipe, using the device for measuring the eccentricity of internal welds in a spiral submerged arc welded pipe as claimed in claim 2. Features: The following steps are involved: Step 1) Place the eccentricity measuring device in the steel pipe, and adjust the ball bearings at the four corners of the bracket to slide automatically against the inner wall of the steel pipe to find the horizontal position; Step 2) Using the horizontal adjustment positioning device, the level ruler provided on the adjustment bracket is placed in a horizontal position, and the adjustment bracket is positioned; Step 3) Turn on the laser ground line locator, slide the moving block to adjust the position of the laser ground line locator so that the ground line projected by the laser ground line locator coincides with the welding wire of the internal welding gun. At this time, the reading of the laser line projected on the scale is the internal welding eccentricity.

8. A method for measuring the internal welding eccentricity of a spiral submerged arc welded pipe according to claim 7, Features: Before use, calibrate the eccentricity measuring device; During calibration, when the four ball bearings are located on the same horizontal plane, the level bubble is at the center of the spirit level, the zero position of the scale is located on the geometric center line in the length direction of the adjustment bracket, and the ground line projected by the laser ground line locator is parallel to the geometric center line.

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