Automatic measuring instrument for steel strip width on spiral pipe production line
By designing an automatic steel strip width measuring instrument on the spiral welded pipe production line, and using linear sensors and PLC control units to achieve high-precision measurement, the problems of insufficient steel strip measurement accuracy and heavy workload of workers in the existing technology are solved. It can adapt to the detection of steel strips of different specifications, and improves the accuracy of measurement and the service life of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TAIYUAN JINTONG HEAVY IND MECHANICAL & ELECTRICAL EQUIPMENT CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-06-09
AI Technical Summary
Existing steel strip width measuring instruments have problems such as high workload for workers and insufficient width measurement accuracy in spiral welded pipe production. Furthermore, traditional measurement methods are not accurate enough in high-temperature environments or are affected by physical interference.
An automatic steel strip width measuring instrument was designed, comprising a frame, a guide unit, a drive unit, a measuring unit, and a PLC control unit. It utilizes a linear sensor and a PLC control unit to achieve accurate measurement, and combines a protective cover and a guide unit to prevent environmental interference, adapting to the detection of steel strips of different specifications.
It achieves micron-level and even nanometer-level precision measurement, reduces labor costs, ensures data stability and accuracy, has wide applicability, extends device lifespan, and improves safety and convenience.
Smart Images
Figure CN224340920U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of measurement technology, specifically relating to an automatic measuring instrument for the width of steel strip on a spiral welded pipe production line. Background Technology
[0002] Spiral welded pipe machines are used to manufacture spiral welded pipes. They can produce steel pipes of different diameters from steel strips of the same width or steel pipes of the same diameter from steel strips of different widths. Spiral welded pipes can be produced to their maximum diameter and can be manufactured continuously with a large production capacity. They are widely used in large-scale national engineering projects or water conservancy projects.
[0003] The impact of steel strip width on spiral welded pipe machines is mainly reflected in the production of pipes. Errors in the pipe blank width affect the welding quality and diameter control of the spiral welded pipe. The width and thickness accuracy of the steel strip are crucial for the production of large-diameter, thick-walled spiral steel pipes. Excessive width error will affect the pitch accuracy of the spiral steel pipe, thus impacting the overall quality of the pipe.
[0004] Currently, steel strip width measuring instruments on the market are divided into devices that measure the width of objects using high-precision linear array cameras and devices that measure the width of steel strips using lasers. Devices that measure the width of objects using high-precision linear array cameras are mainly used for online dimensional measurement of products and finished product inspection. However, due to the low temperature of steel plates, traditional infrared measurement methods can no longer meet the requirements, while using background light sources for measurement greatly increases the workload of workers. Devices that measure the width of steel strips using lasers are used in metrology rooms or workshop inspection stations on the production site. However, errors and physical interference still exist, causing the accuracy of steel strip width measurement to fall short of requirements. Utility Model Content
[0005] In order to overcome the shortcomings of existing technologies and solve the technical problems of high workload for workers and insufficient width measurement accuracy of existing steel strip width measuring instruments, this utility model provides an automatic steel strip width measuring instrument for spiral welded pipe production lines.
[0006] This utility model is achieved through the following technical solution.
[0007] This utility model provides an automatic strip width measuring instrument for spiral welded pipe production lines, including:
[0008] A frame, which is used for support and fixation;
[0009] The guide unit includes a left guide unit and a right guide unit that are symmetrically arranged on the top of the frame with the same structure. The left guide unit and the right guide unit are used to limit and guide the steel strip.
[0010] The drive unit includes a left drive unit and a right drive unit that are symmetrically arranged on the side of the frame with the same structure. The left drive unit drives the left guide unit to approach the steel strip side, and the right drive unit drives the right guide unit to approach the steel strip side.
[0011] The measuring unit includes a left measuring unit and a right measuring unit that are structurally identical and symmetrically arranged on the top of the guide unit. The left measuring unit and the right measuring unit are used to measure the width of the steel strip.
[0012] The PLC control unit is electrically connected to the drive unit and the measurement unit.
[0013] Furthermore, the frame includes two vertically arranged columns, with placement slots at the top of the two columns and shock-absorbing mats at the bottom of the columns.
[0014] Furthermore, both the left and right guide units include a U-shaped groove, a guide shaft, a steel strip guide roller, a sliding seat, and a sliding guide rod. The opening of the U-shaped groove faces the steel strip side. The guide shaft and the steel strip guide roller sleeved on the outside of the guide shaft are located inside the U-shaped groove. The U-shaped groove is movably connected to the top of the placement groove. The side wall of the steel strip guide roller has a recess that matches the edge of the steel strip. The sliding seat and the sliding guide rod are located inside the placement groove. The sliding seat is located on the sliding guide rod and moves back and forth along the sliding guide rod. The top of the sliding seat is fixedly connected to the U-shaped groove.
[0015] Furthermore, the left and right guide units are provided with protective covers on their tops.
[0016] Furthermore, both the left drive unit and the right drive unit include a cylinder seat and a cylinder. The cylinder seat is located on the side wall of the column. The cylinder barrel is connected to the cylinder seat through a trunnion support. The extended end of the cylinder is connected to a U-shaped groove. The cylinder is electrically connected to the PLC control unit. When the extended end of the cylinder extends, it drives the steel strip guide roller in the U-shaped groove to move towards the middle of the frame. When the extended end of the cylinder retracts, it drives the steel strip guide roller in the U-shaped groove to move towards the end of the frame.
[0017] Furthermore, both the left and right measuring units include linear sensors. The linear sensors are located at the end of the protective cover and include a sensing part that is slidably connected inside the linear sensor. The sensing part is fixedly connected to the extended end of the cylinder, and the linear sensor is electrically connected to the PLC control unit.
[0018] The beneficial effects achieved by this utility model are as follows: This utility model selects a measuring unit and a PLC control unit. The linear sensor in the measuring unit converts linear mechanical displacement into an electrical signal. The PLC control unit calculates the displacement to obtain the width of the steel strip, which can be displayed on the screen. The precise measurement of the linear sensor can reach the micron or even nanometer level. The dynamic feedback and real-time monitoring of the linear sensor ensure the stability and accuracy of the data, enabling real-time measurement of steel strips of different specifications and reducing labor costs. The use of a protective cover and a sealed structure prevents iron filings or rust from entering the guide unit and affecting the detection, reducing malfunctions, extending the service life of the device, and ensuring stable operation of the device in harsh environments. The selection of a guide unit, in which the sliding seat and sliding guide rod provide sliding guidance for the steel strip guide roller, ensures displacement accuracy and is also applicable to the detection of steel strips of different widths. The selection of a PLC control unit also enables real-time data transmission and remote operation, improving safety and convenience.
[0019] Compared with the prior art, this utility model has the advantages of high precision, long service life, wide applicability and low cost. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model.
[0021] In the diagram: 1. Frame; 2. Steel strip; 3. Column; 4. Placement groove; 5. Shock-absorbing mat; 6. U-shaped groove; 7. Guide shaft; 8. Steel strip guide roller; 9. Sliding seat; 10. Sliding guide rod; 11. Recess; 12. Protective cover; 13. Cylinder seat; 14. Cylinder; 15. Trunnion support; 16. Linear sensor; 17. Sensing unit. Detailed Implementation
[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0023] like Figure 1 As shown, the automatic strip width measuring instrument on the spiral welded pipe production line includes:
[0024] Frame 1, which is used for support and fixation;
[0025] The guide unit includes a left guide unit and a right guide unit that are symmetrically arranged on the top of the frame 1 with the same structure. The left guide unit and the right guide unit are used to limit and guide the steel strip 2.
[0026] The drive unit includes a left drive unit and a right drive unit that are symmetrically arranged on the side of the frame 1 with the same structure. The left drive unit drives the left guide unit to approach the steel strip 2, and the right drive unit drives the right guide unit to approach the other side of the steel strip 2.
[0027] The measuring unit includes a left measuring unit and a right measuring unit that are symmetrically arranged on the top of the guide unit with the same structure. The left measuring unit and the right measuring unit are used to measure the width of the steel strip 2.
[0028] The PLC control unit is electrically connected to the drive unit and the measurement unit.
[0029] Specifically, the frame 1 provides space for device installation and connection. When the width of the steel strip 2 changes, the left drive unit drives the left guide unit closer to one side of the steel strip 2, and the right drive unit drives the right guide unit closer to the other side of the steel strip 2. This accommodates the detection of widths of steel strips 2 with different specifications. The PLC control unit calculates the displacement based on the data fed back by the measuring unit to obtain the width of the steel strip 2, which can be displayed on the display screen, reducing labor costs, enabling real-time data transmission and remote operation, and improving safety and convenience.
[0030] The frame 1 includes two vertically arranged columns 3, with a placement groove 4 at the top of the two columns 3 and a shock-absorbing mat 5 at the bottom of the columns 3.
[0031] Specifically, the shock-absorbing mat 5 can eliminate interference from external vibrations and improve detection accuracy.
[0032] Both the left and right guide units include a U-shaped groove 6, a guide shaft 7, a steel strip guide roller 8, a sliding seat 9, and a sliding guide rod 10. The opening of the U-shaped groove 6 faces the steel strip 2. The guide shaft 7 and the steel strip guide roller 8, which is sleeved on the outside of the guide shaft 7, are located inside the U-shaped groove 6. The U-shaped groove 6 is movably connected to the top of the placement groove 4. The side wall of the steel strip guide roller 8 is provided with a recess 11, which matches the edge of the steel strip 2. The sliding seat 9 and the sliding guide rod 10 are located inside the placement groove 4. The sliding seat 9 is located on the sliding guide rod 10 and moves back and forth along the sliding guide rod 10. The top of the sliding seat 9 is fixedly connected to the U-shaped groove 6.
[0033] Specifically, the U-shaped groove 6 provides protection for the steel strip guide roller 8 and guide shaft 7. The recess 11 allows for better matching between the steel strip guide roller 8 and the steel strip 2, improving detection accuracy. The steel strip guide roller 8 can reciprocate along the sliding guide rod 10 to accommodate the detection of different width dimensions of the steel strip 2. Simultaneously, the sliding guide rod 10 also limits the movement of the steel strip guide roller 8, ensuring displacement accuracy. The sliding seat 9 ensures the stability of the sliding guide rod 10, preventing displacement deviation due to wobbling of the sliding guide rod 10 during the movement of the steel strip guide roller 8, thus improving the accuracy of steel strip 2 width detection.
[0034] The left and right guide units are provided with protective covers 12 on their tops.
[0035] Specifically, the protective cover 12, with its sealed structure, prevents iron filings or rust from entering the guide unit and affecting the measurement unit's detection, reducing malfunctions, extending the device's service life, and ensuring stable operation of the device in harsh environments such as high temperature and dust.
[0036] Both the left and right drive units include a cylinder seat 13 and a cylinder 14. The cylinder seat 13 is located on the side wall of the column 3. The cylinder barrel of the cylinder 14 is connected to the cylinder seat 13 through a trunnion support 15. The extended end of the cylinder 14 is connected to a U-shaped groove 6. The cylinder 14 is electrically connected to the PLC control unit. When the extended end of the cylinder 14 extends, it drives the steel strip guide roller 8 in the U-shaped groove 6 to move towards the middle of the frame 1. When the extended end of the cylinder 14 retracts, it drives the steel strip guide roller 8 in the U-shaped groove 6 to move towards the end of the frame 1.
[0037] Specifically, before measurement, the measuring unit needs to be returned to the origin, that is, the cylinder 14 is electrically connected to the PLC control unit, and the extended end of the cylinder 14 extends to drive the steel belt guide roller 8 to be close to each other at the origin. When measurement begins, the steel belt 2 passes through the device, and the extended end of the cylinder 14 retracts to drive the steel belt guide roller 8 to approach the edge of the steel belt 2.
[0038] Both the left and right measuring units include a linear sensor 16, which is located at the end of the protective cover 12. The linear sensor 16 includes a sensing part 17, which is slidably connected inside the linear sensor 16. The sensing part 17 is fixedly connected to the extended end of the cylinder 14. The linear sensor 16 is electrically connected to the PLC control unit.
[0039] Specifically, the linear sensor 16 converts linear mechanical displacement into an electrical signal. The linear sensor 16 can selectively output various signals, such as analog output, digital output, and absolute value output. The PLC control unit calculates the displacement to obtain the width dimension of the steel strip 2, which can be displayed on the screen. The linear sensor 16 achieves precise measurements at the micrometer or even nanometer level. Its dynamic feedback and real-time monitoring ensure data stability and accuracy, enabling real-time measurement of steel strips 2 of different specifications and reducing labor costs. When the cylinder 14 extends, the cylinder 14 drives the sensing unit 17 to slide inside the linear sensor 16 to detect the displacement.
[0040] The working process of this utility model is as follows:
[0041] Electrical connections between the PLC control unit and the drive unit and measurement unit;
[0042] Before the steel strip 2 passes through the device, the PLC control unit drives the cylinder 14. The extended end of the cylinder 14 extends and drives the steel strip guide rollers 8 to come into close contact with each other. At this time, the recorded data is 0mm.
[0043] When the steel strip 2 passes through the device, the extended end of the cylinder 14 retracts, driving the steel strip guide roller 8 to approach the edge of the steel strip 2. The linear sensor 16 detects the position of the steel strip guide roller 8 and outputs a signal. The PLC control unit calculates the displacement and obtains the width dimension of the steel strip 2, and then displays the detailed dimensions on the display screen.
[0044] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, modifications can still be made to the embodiments. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. An automatic strip width measuring instrument for spiral welded pipe production lines, characterized in that: include: A frame (1) is used for support and fixation; The guide unit includes a left guide unit and a right guide unit that are symmetrically arranged on the top of the frame (1) with the same structure. The left guide unit and the right guide unit are used to limit and guide the steel strip (2). The drive unit includes a left drive unit and a right drive unit that are symmetrically arranged on the side of the frame (1) with the same structure. The left drive unit drives the left guide unit to approach the steel strip (2) and the right drive unit drives the right guide unit to approach the other side of the steel strip (2). The measuring unit includes a left measuring unit and a right measuring unit that are symmetrically arranged on the top of the guide unit with the same structure. The left measuring unit and the right measuring unit are used to measure the width of the steel strip (2). The PLC control unit is electrically connected to the drive unit and the measurement unit.
2. The automatic strip width measuring instrument for spiral welded pipe production line according to claim 1, characterized in that: The frame (1) includes two vertically arranged columns (3), the top of the two columns (3) is provided with a placement groove (4), and the bottom of the columns (3) is provided with a shock-absorbing mat (5).
3. The automatic strip width measuring instrument for spiral welded pipe production line according to claim 2, characterized in that: The left and right guide units each include a U-shaped groove (6), a guide shaft (7), a steel strip guide roller (8), a sliding seat (9), and a sliding guide rod (10). The opening of the U-shaped groove (6) faces the steel strip (2). The guide shaft (7) and the steel strip guide roller (8) sleeved on the outside of the guide shaft (7) are located inside the U-shaped groove (6). The U-shaped groove (6) is movably connected to the top of the placement groove (4). The side wall of the steel strip guide roller (8) is provided with a recess (11), which matches the edge of the steel strip (2). The sliding seat (9) and the sliding guide rod (10) are located inside the placement groove (4). The sliding seat (9) is located on the sliding guide rod (10) and moves back and forth along the sliding guide rod (10). The top of the sliding seat (9) is fixedly connected to the U-shaped groove (6).
4. The automatic strip width measuring instrument for spiral welded pipe production line according to claim 3, characterized in that: The left and right guide units are provided with protective covers (12) on their tops.
5. The automatic strip width measuring instrument for spiral welded pipe production line according to claim 4, characterized in that: Both the left drive unit and the right drive unit include a cylinder seat (13) and a cylinder (14). The cylinder seat (13) is located on the side wall of the column (3). The cylinder barrel of the cylinder (14) is connected to the cylinder seat (13) through a trunnion support (15). The extended end of the cylinder (14) is connected to a U-shaped groove (6). The cylinder (14) is electrically connected to the PLC control unit. When the extended end of the cylinder (14) extends, it drives the steel strip guide roller (8) in the U-shaped groove (6) to move towards the middle of the frame (1). When the extended end of the cylinder (14) retracts, it drives the steel strip guide roller (8) in the U-shaped groove (6) to move towards the end of the frame (1).
6. The automatic strip width measuring instrument for spiral welded pipe production line according to claim 5, characterized in that: Both the left and right measuring units include a linear sensor (16). The linear sensor (16) is located at the end of the protective cover (12). The linear sensor (16) includes a sensing part (17). The sensing part (17) is slidably connected inside the linear sensor (16). The sensing part (17) is fixedly connected to the extended end of the cylinder (14). The linear sensor (16) is electrically connected to the PLC control unit.