Device for automatically measuring plate width of spiral welded pipe
By combining left and right rangefinders and a computer control module, high-precision automatic measurement of the width of spiral welded pipe sheet is achieved, solving the problems of inaccurate measurement and safety hazards in the existing technology, and improving measurement accuracy and forming accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2026-03-17
AI Technical Summary
Existing technologies for measuring the width of spiral welded pipes are inaccurate, pose safety hazards, involve high labor intensity, and are difficult to achieve with high-precision automatic measurement.
By employing left and right rangefinders and a calculation and control module, the left and right edge positions of the strip are measured using laser or ultrasonic sensors. Combined with tilt angle calculation, high-precision automatic measurement of the strip width is achieved, reducing labor intensity and eliminating safety hazards.
It improves the accuracy of plate width measurement, ensuring the error is within ±0.1mm, enhances the accuracy of spiral welded pipe forming, reduces the labor intensity of operators, and eliminates safety hazards.
Smart Images
Figure CN224004402U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of spiral welded pipe manufacturing technology, specifically to an automatic measurement device for the width of spiral welded pipe plates. Background Technology
[0002] In the production process of spiral welded pipes, after the steel coil is uncoiled and leveled, the steel strip is milled to form a welding bevel and determine the strip width. It is then conveyed by a delivery machine to a forming machine to complete the spiral coiling into a steel pipe and welding it internally and externally. The strip width must be controlled within a certain range to ensure the formation of spiral welded pipes with a fixed diameter. Currently, steel tape measures are commonly used to measure the strip width. This type of measurement is time-consuming, inaccurate, and only measures a sample of the produced strips; it also poses safety hazards.
[0003] A known drawback of image scanning inspection devices is that inaccuracies arising when the plate is transported toward the measuring device, such as plate vibration and torsion, can cause inspection distortion.
[0004] To improve the accuracy and precision of spiral welded pipe plate width measurement, reduce the labor intensity of personnel, and eliminate safety hazards in the measurement process, it is necessary to design an automatic plate width measurement device to ensure that the plate width error is kept within ±0.1mm. Utility Model Content
[0005] In view of the defects existing in the prior art, the purpose of this utility model is to provide an automatic spiral welded pipe plate width measuring device that can accurately measure the width of spiral welded pipe plates regardless of the plate conveying conditions, ensure that the plate width error is kept within ±0.1mm, reduce the labor intensity of the personnel on site, and eliminate the technical problems of safety hazards in the measurement process.
[0006] The purpose of this utility model is achieved as follows: an automatic measuring device for the width of spiral welded pipe sheet, comprising...
[0007] The left rangefinder includes a left guide roller and a left upper shooting pen. The left guide roller is used to measure the position of the left edge of the strip W. The left upper shooting pen is fixed perpendicular to the horizontal plane with the left upper ray direction and is used to emit a detection signal toward the steel plate surface and return a signal to measure the left top distance H1.
[0008] The right rangefinder includes a right abutment roller, a right upper-shooting pen, and a right data unit. The right abutment roller rests against the right edge of the steel plate W with a vertical axis of rotation. The right upper-shooting pen is fixed perpendicular to the horizontal plane with the right upper-ray direction and is used to emit a detection signal toward the steel plate surface and return a signal to measure the right top distance H2.
[0009] The calculation and control module includes a receiver, a tilt angle calculation module, a plate width calculation module, and a control module. The receiver receives data from the left and right data transmitters. The tilt angle calculation module calculates the tilt angle of the steel plate W. The width calculation module calculates the plate width based on the tilt angle.
[0010] Furthermore, the left roller rests against the left edge of the steel plate W with a vertical axis of rotation, and the right roller rests against the right edge of the steel plate W with a vertical axis of rotation; the left edge position is the left distance L1 from the left roller to the left side of the left code generator, and the right edge position is the right distance L2 from the right roller to the right side of the right code generator.
[0011] Furthermore, the tilt angle is calculated based on the left top distance H1, the right top distance H2, and the ray span Lc:
[0012]
[0013] Furthermore, the width calculation module calculates the board width W based on the tilt angle α and Lg. b :
[0014] Where L1 is the left side distance measurement, L2 is the right side distance measurement, L0 is the bus span, and r is the radius of the left and right side rollers.
[0015] Furthermore, the bottom of the left support roller is connected to the left slider, which is connected to the left code generator. A left spring is installed between the left slider and the left code generator. The right support roller is connected to the right code generator through the right slider. A right spring is installed between the right slider and the right code generator.
[0016] Furthermore, the calculation and control module includes a receiver, a tilt angle calculation module, a plate width calculation module, and a control module. The receiver receives data from the left and right data transmitters, the tilt angle calculation module calculates the tilt angle of the steel plate W, and the width calculation module calculates the plate width based on the tilt angle.
[0017] Furthermore, when the tilt angle α satisfies |α-3|≥0, the control module controls the alarm device to issue an alarm.
[0018] An automatic measurement device for the width of spiral welded pipe strips is disclosed. It measures the horizontal distance by using a roller and the inclination angle of the steel strip by using vertical projection from both sides. The width of the steel strip is determined by measuring the horizontal distance and the inclination angle. The length measurement and angle measurement are coordinated, resulting in high accuracy of the obtained steel strip width. It overcomes the measurement defect that the roller cannot reflect the inclination of the steel strip, improves the measurement accuracy, and increases the accuracy of spiral welded pipe forming. It has great practical value. Attached Figure Description
[0019] Figure 1 This is a front sectional view of Embodiment 1 of the automatic measurement device for the width of spiral welded pipe sheet according to the present invention;
[0020] Figure 2 This is Embodiment 1 of an automatic measurement device for the width of spiral welded pipe sheet according to the present invention. Figure 1 A schematic diagram of the measured variables;
[0021] Figure 3 This is Embodiment 1 of an automatic measurement device for the width of spiral welded pipe sheet according to the present invention. Figure 1 A schematic diagram for calculating the inclination angle of the strip;
[0022] Figure 4 This is Embodiment 1 of an automatic measurement device for the width of spiral welded pipe sheet according to the present invention. Figure 1 A schematic diagram for calculating the plate width;
[0023] Figure 5 This is Embodiment 1 of an automatic measurement device for the width of spiral welded pipe sheet according to the present invention. Figure 1 A schematic diagram of the computing and control module.
[0024] The reference numerals in the above figure:
[0025] 10 Left rangefinder, 11 Left guide roller, 12 Left upper-shooting pen retractor, 13 Left data transmitter, 14 Left line code transmitter, 15 Left slider, 16 Left spring.
[0026] 20 Right rangefinder, 21 Right guide roller, 22 Right upper-shooting pen retractor, 23 Right data unit, 24 Right line code unit, 25 Right slider, 26 Right spring.
[0027] 30. Calculation and control module, 31. Receiver, 32. Calculation tilt angle, 33. Calculation board width, 34. Control module, 35. Board width display, 36. Alarm device. Detailed Implementation
[0028] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but are not intended to limit the scope of the present invention.
[0029] Example 1
[0030] like Figure 1 As shown, an automatic measuring device for the width of spiral welded pipe sheet includes...
[0031] The left rangefinder 10 includes a left support roller 11, a left upper shooting pen 12, and a left data unit 13. The left support roller 11 is abutted against the left edge of the strip W with a vertical rotation axis and is used to measure the distance L1 from the left edge of the strip W to the left side of the left code unit 14. The left upper shooting pen 12 is fixed perpendicular to the horizontal plane with the left upper ray direction 12a and is used to emit a detection signal toward the strip surface and return a signal to measure the left top distance H1.
[0032] The right rangefinder 20 includes a right abutment roller 21, a right upper-shooting pen 22, and a right data unit 23. The right abutment roller 21 rests against the right edge of the strip W with a vertical axis of rotation and is used to measure the distance L2 from the right edge of the strip W to the right side of the right line code unit 24. The right upper-shooting pen 22 is fixed perpendicular to the horizontal plane with a right upper-ray direction 22a and is used to emit a detection signal toward the strip surface and return a signal to measure the right top distance H2.
[0033] The calculation and control module 30 includes a receiver 31, a tilt angle calculation module 32, a board width calculation module 33, and a control module 34. The receiver 31 receives data from the left data unit 13 and the right data unit 23. The tilt angle calculation module 32 calculates the tilt angle α of the board strip W. The board width calculation module 33 calculates the board width W. b .
[0034] The transmitters for the upper left and upper right shooting points 12 and 22 are laser sensors and ultrasonic sensors, respectively.
[0035] The measuring device is installed on both edges of the continuous conveyor belt W.
[0036] like Figure 2 As shown, the tilt angle α is calculated based on the left top distance H1 (mm), right top distance H2 (mm), and ray span Lc (mm).
[0037]
[0038] like Figure 3 As shown, Lg is the horizontal distance measured by the rollers, i.e., Lg = L0 - L1 - L2 - 2r, where L1 is the distance measured on the left, L2 is the distance measured on the right, L0 is the bus span, and r is the radius of the left roller 11 and the right roller 21. The width calculation module 33 calculates the plate width W based on the tilt angle α and Lg. b :
[0039]
[0040] The bottom of the left guide roller 11 is connected to the left slider 15, which in turn connects to the left code encoder 14. A left spring 16 is installed between the left slider 15 and the left code encoder 14. The right guide roller 21 is connected to the right code encoder 24 via the right slider 25. A right spring 26 is installed between the right slider 25 and the right code encoder 24.
[0041] Actual measurements verified that for board widths of 2000mm with tilt angles of 1°, 2°, 3°, 4°, and 5°, only the board width W measured by the roller was found to be the correct value. b As a comparative example, the plate width considered in the plate inclination measurement in this application is shown in the following table:
[0042] Comparative example: Formula for plate width measured only by the guide wheel: W b =L0-L1-L2-2r.
[0043] Theoretical board width Incline angle Comparative Example This application 2000mm 1° 1999.71 2000.01 2000mm 2° 1998.90 2000.12 2000mm 3° 1997.40 2000.14 2000mm 4° 1995.29 2000.16 2000mm 5° 1992.46 2000.07
[0044] The calculation and control module 30 also includes a board width display 35, which is used to display the tilt angle α and the width of the board strip W.
[0045] When the tilt angle α satisfies |α-3|≥0, the control module 34 controls the alarm device 36 to issue an alarm, prompting the operator to adjust the conveying status of the belt W.
[0046] An automatic measurement device for the width of spiral welded pipe strips is disclosed. It measures the horizontal distance by using a roller and the inclination angle of the steel strip by using vertical projection from both sides. The width of the steel strip is determined by measuring the horizontal distance and the inclination angle. The length measurement and angle measurement are coordinated, resulting in high accuracy of the obtained steel strip width. It overcomes the measurement defect that the roller cannot reflect the inclination of the steel strip, improves the measurement accuracy, and increases the accuracy of spiral welded pipe forming. It has great practical value.
Claims
1. A spiral welded pipe plate width automatic measuring device, characterized in that, Comprising A left distance sensor (10) comprising a left abutting roller (11) for measuring the left edge position of the plate strip W and a left upper emitting and receiving pen (12) fixed perpendicularly to the horizontal plane in a left upper ray direction (12a) for emitting a detection signal towards the plate surface of the steel plate and returning the signal to measure the left top distance H1; A right distance sensor (20) comprising a right abutting roller (21) abutting against the right edge position of the steel plate W with a vertical rotating axis, a right upper emitting and receiving pen (22) fixed perpendicularly to the horizontal plane in a right upper ray direction (22a) for emitting a detection signal towards the plate surface of the steel plate and returning the signal to measure the right top distance H2; and a right data sensor (23). A control module (30) for calculating the strip width W b .
2. The apparatus for automatic measurement of the width of the plate for helical pipe welding as claimed in claim 1, characterized in that The left abutting roller (11) abuts against the left edge of the steel plate W with a vertical rotating axis, and the right abutting roller (21) abuts against the right edge of the steel plate W with a vertical rotating axis; the left edge position is the left edge distance L1 from the left abutting roller (11) to the left line encoder (14), and the right edge position is the right edge distance L2 from the right abutting roller (21) to the right line encoder (24).
3. The apparatus for automatic measurement of the width of the plate for helical pipe welding as claimed in claim 1, wherein The control module (30) comprises a receiver (31), a tilt angle calculation module (32), a plate width calculation module (33) and a control module (34). The receiver (31) receives data from the left data generator (13) and the right data generator (23). The tilt angle calculation module (32) calculates the tilt angle a of the steel plate W. The plate width calculation module (33) calculates the plate width W according to the tilt angle a b .
4. The apparatus for automatic measurement of the width of the plate for helical pipe welding as claimed in claim 3, wherein The tilt angle (32) is calculated according to the left top distance H1, the right top distance H2 and the ray span Lc:
5. The apparatus for automatic measurement of the width of the plate for helical pipe welding as claimed in claim 3, wherein Board width (33) is calculated from the tilt angle a, Lg, and the board width W b : L1 is the left distance, L2 is the right distance, L0 is the total span of the line, and r is the radius of the left and right pinch rollers (11, 21).
6. A device for automatic measurement of the width of a spiral pipe sheet as claimed in claim 1, characterized in that The bottom of the left abutting roller (11) is connected to the left sliding block (15) which is connected to the left line encoder (14), and a left spring (16) is arranged between the left sliding block (15) and the left line encoder (14); the right abutting roller (21) is connected to the right line encoder (24) through the right sliding block (25), and a right spring (26) is arranged between the right sliding block (25) and the right line encoder (24).
7. The apparatus for automatic measurement of the width of the plate for helical pipe welding as claimed in claim 6, wherein When the tilt angle α satisfies |α-3|≥0, the control module (34) controls the alarm device (36) to alarm.