A pipe welding run-out size measuring device

Abstract

The present application belongs to the technical field of welded pipe run-out size measurement, in particular to a welded pipe run-out size measurement device, which comprises a base, two groups of support frames are symmetrically installed on the base, two groups of transmission rollers are rotatably installed between the two groups of support frames, a plurality of groups of support wheels for supporting the welded pipe are installed on the transmission rollers, the base is further provided with a mounting frame, three groups of lasers are equidistantly installed on the mounting frame, and the lasers are located directly above the two groups of transmission rollers. The cylindrical welded pipe is supported by the multiple groups of arranged support wheels, which avoids the cylindrical welded pipe from being suspended in a large area, enables the cylindrical welded pipe to stably rotate, and improves the accuracy of the cylindrical welded pipe run-out size measurement. Furthermore, the three groups of lasers simultaneously measure the middle part and both ends of the cylindrical welded pipe, obtain three groups of data, compare the data, can obtain more accurate measurement data, and further improve the accuracy of the size measurement.

Description

Technical Field

[0001] This invention belongs to the field of welded pipe runout measurement technology, specifically a welded pipe runout measurement device. Background Technology

[0002] Runout testing of cylindrical welded pipes is a critical process for ensuring pipe quality. Excessive runout can lead to vibration and noise in the pipeline system, seal failure, abnormal bearing wear, and even safety accidents in high-pressure fluid transportation. Through laser non-contact measurement, runout data in the entire circumference can be quickly obtained, enabling precise separation of roundness error and eccentricity error. This provides a quantitative basis for process optimization and ensures that products meet the stringent standards of precision machinery, automobile manufacturing, and oil and gas transportation.

[0003] Patent CN217210734U discloses a cylindrical welded pipe runout measurement device, including a base, a first cylindrical welded pipe support, a second cylindrical welded pipe support, and a laser. This solution drives the cylindrical welded pipe to be measured to rotate via a drive motor, and emits a laser signal through the laser and receives the reflected signal, thereby achieving the purpose of detecting the cylindrical welded pipe to be measured. Compared with the disadvantages of traditional manual inspection relying on dial indicators for point-by-point measurement, which is inefficient and easily affected by human factors, this device can achieve full-circumference automatic scanning measurement, with high data acquisition density, good repeatability, and detection efficiency increased by tens of times. The measurement accuracy can reach the micron level, effectively eliminating defective products and significantly improving the automation level and quality control capabilities of welded pipe production.

[0004] In the above-mentioned scheme, when inspecting the cylindrical welded pipe, both ends of the cylindrical welded pipe need to be placed on the first cylindrical welded pipe support and the second cylindrical welded pipe support respectively, with the middle of the cylindrical welded pipe suspended in the air. Since the length of the cylindrical welded pipe is generally 6 meters, the suspended area of ​​the cylindrical welded pipe is relatively large. Under its own gravity, the cylindrical welded pipe will bend, and the pipe runout detected by the laser will be a false "full runout", thus affecting the accuracy of the welded pipe inspection. To this end, the present invention provides a welded pipe runout measurement device. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The welded pipe runout measurement device of the present invention includes a base, two sets of support frames are symmetrically installed on the base, two sets of transmission rollers are rotatably installed between the two sets of support frames, several sets of support wheels for supporting the welded pipe are installed on the transmission rollers, and the base is also equipped with a mounting frame, on which three sets of lasers are installed at equal distances, and the lasers are located directly above the two sets of transmission rollers. The cylindrical welded pipe is supported by multiple sets of support wheels to prevent large areas of the pipe from being suspended in the air, thus enabling the pipe to rotate stably and improving the accuracy of measuring its runout. Secondly, three sets of lasers are used to simultaneously measure the middle and both ends of the cylindrical welded pipe, obtaining three sets of data. By comparing these data, more accurate measurement data can be obtained, further improving the accuracy of dimensional measurement.

[0007] Preferably, an arrangement mechanism is provided below the two sets of transmission rollers. The arrangement mechanism includes two sets of slide rods symmetrically mounted on the base, a fixed seat, and two sets of support wheels symmetrically rotatably mounted on the fixed seat. Multiple sets of movable seats are evenly distributed on both sides of the fixed seat, with two sets of slide rods slidably connected to both ends of the movable seats. Two sets of support wheels are symmetrically rotatably mounted on the movable seats. A pin is fixedly mounted at the bottom of the fixed seat. One end of each of the two sets of scissor-type telescopic frames is hinged to the pin. Multiple nodes on the scissor-type telescopic frames are respectively connected to the bottom of the multiple sets of movable seats. Two sets of support seats are fixedly mounted at both ends of the bottom of the fixed seat, and the two sets of support seats support the fixed seat. Three sets of guide bars are set at equal angles on the transmission rollers. Three sets of guide grooves are opened on the inner ring of the support wheels, and the three sets of guide grooves are slidably connected to the three sets of guide bars. The device is equipped with a drive mechanism, which includes a screw rod rotatably mounted in the base, a first bevel gear fixedly connected to one end of the screw rod, two sets of second bevel gears meshing with the first bevel gear, a first lead screw fixedly connected to the second bevel gear, a slider screwed to the first lead screw, a receiving rod rotatably mounted on the slider, and a set of nodes fixedly connected to the upper end of the receiving rod on the cross-type telescopic frame. Two sets of mounting slots are symmetrically opened on the base, and the two sets of first lead screws are rotatably mounted in the two sets of mounting slots respectively. The mounting frame includes a slide rail fixedly mounted on the base, two sets of movable frames symmetrically slidably mounted on the slide rail, two sets of lasers respectively mounted on the two sets of movable frames, and a fixed frame set between the two sets of movable frames. The fixed frame is fixedly mounted in the middle of the slide rail, and one set of lasers is mounted on the fixed frame. Each movable frame is equipped with a connecting rod, and the two sets of connecting rods connect the two sets of movable seats. Because the distribution distance of multiple sets of support wheels can be adjusted by rotating the lever, multiple sets of support wheels can support and measure cylindrical welded pipes of different lengths, thus improving the practicality of the device.

[0008] Preferably, the fixed seat includes a horizontal plate, with two sets of sliding rods fixedly connected to both ends of the horizontal plate, a double-threaded screw rotatably mounted on the horizontal plate, two sets of active supports screwed onto the double-threaded screw, each active support rotatably mounted with a support wheel, a rectangular groove opened on the horizontal plate, a guide rod installed in the rectangular groove, and the active support slidably connected to the active support. The movable seat includes a driven plate, with two sets of sliding rods slidably connected to both ends of the driven plate, a guide rail fixedly mounted on the driven plate, two sets of driven supports symmetrically slidably mounted on the guide rail, each driven support rotatably mounted with a support wheel, and a support frame including two sets of support seats, both ends of the two sets of transmission rollers rotatably connected to the support seats, through holes opened on the support seats, and guide posts slidably connected to the through holes, with the guide posts fixedly mounted on the base. The distance between the two sets of support wheels can be adjusted by rotating the double-threaded screw, enabling the device to measure cylindrical welded pipes of different outer diameters, thus further improving the device's practicality.

[0009] The beneficial effects of this invention are as follows: 1. The cylindrical welded pipe is supported by multiple sets of support wheels to prevent large areas of the cylindrical welded pipe from being suspended in the air, so that the cylindrical welded pipe can rotate stably and improve the accuracy of measuring the runout dimension of the cylindrical welded pipe. Secondly, three sets of lasers are used to measure the middle and both ends of the cylindrical welded pipe at the same time, and three sets of data are obtained. By comparing the data, more accurate measurement data can be obtained, which further improves the accuracy of dimensional measurement.

[0010] 2. Rotating the screw rod drives the first bevel gear to rotate, which in turn drives two sets of second bevel gears to rotate. The second bevel gears then drive the first lead screw to rotate, causing the slider to extend the scissor-type telescopic frame via the receiving rod. The extended scissor-type telescopic frame simultaneously moves multiple sets of movable seats through multiple nodes. The movable seats slide along the slide rod, and the support wheels move with the movable seats, widening the spacing and distribution distance of the multiple sets of support wheels until this distribution distance matches the length of the cylindrical welded pipe. During the movement of the multiple sets of movable seats, two sets of movable seats drive two sets of connecting rods to move. The connecting rods drive the movable frame to slide along the slide rail, and the movable frame simultaneously drives the corresponding laser to move. This causes the laser to move as the distribution distance of the multiple sets of support wheels increases, thus enabling the measurement of excessively long cylindrical welded pipes. Because the distribution distance of the multiple sets of support wheels can be adjusted by rotating the screw rod, the multiple sets of support wheels can support and measure cylindrical welded pipes of different lengths, improving the practicality of the device.

[0011] 3. Rotating the double-threaded screw causes the two sets of active supports to move in opposite directions along the guide rod. Simultaneously, the distance between the two sets of support wheels increases as the two sets of active supports move. These support wheels then drive the two sets of transmission rollers to move in opposite directions, which in turn drive the other two sets of support wheels to move in opposite directions. Multiple sets of support wheels drive the corresponding driven supports to slide along the guide rail. Simultaneously, the transmission rollers drive the support seats at both ends to slide along the guide post, allowing the distance between the two sets of support wheels to be stably increased. This increased distance enables the two sets of support wheels to support cylindrical welded pipes with larger outer diameters, ensuring stable rotation of the pipes. Therefore, by rotating the double-threaded screw, the distance between the two sets of support wheels can be adjusted, allowing the device to measure cylindrical welded pipes of different outer diameters, further improving the device's practicality. Attached Figure Description

[0012] The invention will now be further described with reference to the accompanying drawings.

[0013] Figure 1 This is a partial schematic diagram of the structure of the present invention.

[0014] Figure 2 This is a schematic diagram of the combination of the transmission roller, support wheel, and arrangement mechanism of the present invention.

[0015] Figure 3 This is a schematic diagram from another perspective of the combination of the transmission roller, support wheel, and arrangement mechanism of the present invention.

[0016] Figure 4 This is a schematic diagram of the combination of the transmission roller and the support wheel of the present invention.

[0017] Figure 5 This is a schematic diagram of the combination of the base, the cross-shaped telescopic frame, and the drive mechanism of the present invention.

[0018] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0019] Figure 7 This is a schematic diagram of the overall structure of the present invention.

[0020] Figure 8 This is a schematic diagram of the combination of the transmission roller, support wheel, slide bar, fixed seat, and movable seat of the present invention.

[0021] Figure 9 This is a schematic diagram of the combination of the support frame and the transmission roller of the present invention.

[0022] In the diagram: 1. Base; 101. Mounting slot; 2. Support frame; 201. Support base; 202. Through hole; 203. Guide post; 3. Transmission roller; 301. Guide strip; 4. Support wheel; 401. Guide groove; 5. Mounting frame; 501. Slide rail; 502. Movable frame; 503. Fixed frame; 504. Connecting rod; 6. Laser; 7. Arrangement mechanism; 701. Slide rod; 702. Fixed base; 7021. Horizontal plate; 7022. Double... 7023, Lead screw; 7024, Active support; 7025, Rectangular groove; 7026, Guide rod; 7077, Moving seat; 708, Driven plate; 709, Guide rail; 7000, Driven support; 7001, Pin; 702, Cross-type telescopic frame; 703, Support seat; 804, Drive mechanism; 805, First bevel gear; 806, Second bevel gear; 807, First lead screw; 808, Slider; 809, Receiving rod; 8000, Tightening rod. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] Example 1: As Figure 1 As shown in the embodiment of the present invention, a welded pipe runout measurement device includes a base 1, two sets of support frames 2 are symmetrically installed on the base 1, two sets of transmission rollers 3 are rotatably installed between the two sets of support frames 2, several sets of support wheels 4 for supporting the welded pipe are installed on the transmission rollers 3, the base 1 is also equipped with a mounting frame 5, and three sets of lasers 6 are installed at equal intervals on the mounting frame 5, the lasers 6 being located directly above the two sets of transmission rollers 3.

[0025] Specifically, when it is necessary to measure the runout dimension of a cylindrical welded pipe, the cylindrical welded pipe is placed on multiple sets of support wheels 4, and then three sets of lasers 6 are activated. Simultaneously, a set of transmission rollers 3 is driven by a motor to rotate. This set of transmission rollers 3 drives multiple sets of support wheels 4 to rotate, and the rotating support wheels 4 drive the cylindrical welded pipe to rotate. The cylindrical welded pipe drives the other multiple sets of support wheels 4, enabling the cylindrical welded pipe to rotate smoothly 360 degrees. During the rotation of the cylindrical welded pipe, the lasers 6 emit laser signals to the cylindrical welded pipe and receive the reflected signals to realize the runout dimension measurement of the cylindrical welded pipe. Compared with the existing technology, the support of the cylindrical welded pipe by multiple sets of arranged support wheels 4 avoids large areas of the cylindrical welded pipe being suspended, enabling the cylindrical welded pipe to rotate stably and improving the accuracy of the runout dimension measurement. Secondly, by using three sets of lasers 6 to simultaneously measure the middle and both ends of the cylindrical welded pipe, three sets of data are obtained. By comparing the data, more accurate measurement data can be obtained, further improving the accuracy of the dimension measurement.

[0026] like Figures 2 to 7As shown, an arrangement mechanism 7 is provided below the two sets of transmission rollers 3. The arrangement mechanism 7 includes two sets of slide rods 701, which are symmetrically mounted on the base 1. A fixed seat 702 is provided, with the middle parts of the two sets of slide rods 701 fixedly connected to both ends of the fixed seat 702. Two sets of support wheels 4 are symmetrically rotatably mounted on the fixed seat 702. Multiple sets of movable seats 703 are evenly distributed on both sides of the fixed seat 702. The two sets of slide rods 701 are slidably connected to both ends of the movable seats 703. Two sets of support wheels 4 are symmetrically rotatably mounted on the movable seats 703 and fixedly mounted on the bottom of the fixed seat 702. The pin 704 at the part is hinged to one end of each of the two sets of cross-type telescopic frames 705. Multiple sets of nodes on the cross-type telescopic frames 705 are connected to the bottom of multiple sets of movable seats 703. Two sets of support seats 706 are fixedly installed at both ends of the bottom of the fixed seat 702. The two sets of support seats 706 support the fixed seat 702. Three sets of guide bars 301 are set at equal angles on the transmission roller 3. Three sets of guide grooves 401 are opened on the inner ring of the support wheel 4. The three sets of guide grooves 401 are slidably connected to the three sets of guide bars 301 respectively. A drive mechanism 8 is set below the arrangement mechanism 7. The drive mechanism 8 includes a screw rod 806, which is rotatably mounted inside the base 1. A first bevel gear 801 is fixedly connected to one end of the screw rod 806. Two sets of second bevel gears 802 mesh with the first bevel gear 801. A first lead screw 803 is fixedly connected to the second bevel gears 802. A slider 804 is screwed to the first lead screw 803. A receiving rod 805 is rotatably mounted on the slider 804. A set of nodes on the cross-type telescopic frame 705 is fixedly connected to the upper end of the receiving rod 805. Two sets of mounting slots 101 are symmetrically opened on the base 1. The two sets of first lead screws 803... The mounting bracket 5 is rotatably installed in two sets of mounting slots 101. The mounting bracket 5 includes a slide rail 501, which is fixedly installed on the base 1. Two sets of movable brackets 502 are symmetrically slidably installed on the slide rail 501. Two sets of lasers 6 are respectively installed on the two sets of movable brackets 502. A fixed bracket 503 is set between the two sets of movable brackets 502. The fixed bracket 503 is fixedly installed in the middle of the slide rail 501. One set of lasers 6 is installed on the fixed bracket 503. Each movable bracket 502 is equipped with a connecting rod 504. The two sets of connecting rods 504 connect the two sets of movable seats 703.

[0027] Specifically, when the length of the cylindrical welded pipe exceeds 6 meters, a large area will be suspended at both ends of the cylindrical welded pipe, and a false "full jump" phenomenon will reappear when measuring the cylindrical welded pipe. Therefore, when the length of the cylindrical welded pipe is too long, rotating the screw rod 806 causes the first bevel gear 801 to rotate, which in turn drives two sets of second bevel gears 802 to rotate. The second bevel gears 802 then drive the first lead screw 803 to rotate, causing the slider 804 to extend the cross-shaped telescopic frame 705 via the receiving rod 805. The extended cross-shaped telescopic frame 705 simultaneously drives multiple sets of movable seats 703 to move through multiple sets of nodes. The movable seats 703 slide along the sliding rod 701, and at the same time, the support wheels 4 move with the movable seats 703, thus widening the spacing and increasing the distribution distance of the multiple sets of support wheels 4 until the desired distribution distance is reached. To match the length of the cylindrical welded pipe, during the movement of multiple sets of movable seats 703, two sets of movable seats 703 drive two sets of connecting rods 504 to move. The connecting rods 504 drive the movable frame 502 to slide along the slide rail 501. At the same time, the movable frame 502 drives the corresponding laser 6 to move, so that the laser 6 moves as the distribution distance of the multiple sets of support wheels 4 increases. This allows for the matching and measurement of cylindrical welded pipes that are too long. Since the distribution distance of the multiple sets of support wheels 4 can be adjusted by rotating the screw rod 806, the multiple sets of support wheels 4 can support and measure cylindrical welded pipes of different lengths, thus improving the practicality of the device.

[0028] Example 2: Figure 8 and Figure 9 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: the fixed base 702 includes a horizontal plate 7021, two sets of sliding rods 701 are fixedly connected to both ends of the horizontal plate 7021, a double-threaded screw 7022 is rotatably mounted on the horizontal plate 7021, two sets of active brackets 7023 are screwed onto the double-threaded screw 7022, support wheels 4 are rotatably mounted on the active brackets 7023, a rectangular groove 7024 is opened on the horizontal plate 7021, a guide rod 7025 is installed in the rectangular groove 7024, and the active brackets 7023 are slidably connected to the active brackets 7023. The moving base 703 includes a driven plate 7031, two sets of slide rods 701 slidably connected to both ends of the driven plate 7031, a guide rail 7032 fixedly installed on the driven plate 7031, two sets of driven brackets 7033 symmetrically slidably installed on the guide rail 7032, and a support wheel 4 rotatably installed on the driven bracket 7033. The support frame 2 includes two sets of support seats 201, both ends of the two sets of transmission rollers 3 are rotatably connected to the support seats 201, a through hole 202 is opened on the support seat 201, and a guide post 203 slidably connected to the through hole 202 is fixedly installed on the base 1.

[0029] Specifically, when the outer diameter of the cylindrical welded pipe increases, rotating the double-threaded screw 7022 causes the two sets of active supports 7023 to move in opposite directions along the guide rod 7025. Simultaneously, the distance between the two sets of support wheels 4 increases as the two sets of active supports 7023 move. Furthermore, the two sets of support wheels 4 drive the two sets of transmission rollers 3 to move in opposite directions, and the two sets of transmission rollers 3 drive the other two sets of support wheels 4 to move in opposite directions. Multiple sets of support wheels 4 drive the corresponding driven supports 7033 to slide along the guide rail 7032. At the same time, the transmission rollers 3 drive the support seats 201 at both ends to slide along the guide post 203, allowing the distance between the two sets of support wheels 4 to be stably increased. This increased distance enables the two sets of support wheels 4 to support the cylindrical welded pipe with a larger outer diameter, ensuring stable rotation of the pipe. Therefore, by rotating the double-threaded screw 7022, the distance between the two sets of support wheels 4 can be adjusted, allowing the device to measure cylindrical welded pipes with different outer diameters, further improving the device's practicality.

[0030] Working principle: The cylindrical welded pipe is placed on multiple sets of support wheels 4, and then three sets of lasers 6 are activated. At the same time, a set of transmission rollers 3 is driven by a motor to rotate. The transmission rollers 3 drive multiple sets of support wheels 4 to rotate. The rotating support wheels 4 drive the cylindrical welded pipe to rotate. The cylindrical welded pipe drives the other multiple sets of support wheels 4, so that the cylindrical welded pipe can rotate smoothly 360 degrees. During the rotation of the cylindrical welded pipe, the laser 6 emits laser signals to the cylindrical welded pipe and receives its reflected signals to realize the measurement of the runout dimension of the cylindrical welded pipe. When the cylindrical welded pipe is too long, the screw rod 806 is rotated, which drives the first bevel gear 801 to rotate. The first bevel gear 801 drives two sets of second bevel gears 802 to rotate, and the second bevel gears 802 drive the first lead screw 803 to rotate. This causes the slider 804 to extend the cross-shaped telescopic frame 705 through the receiving rod 805. The extended cross-shaped telescopic frame 705 simultaneously drives multiple sets of movable seats 703 to move through multiple sets of nodes. The movable seats 703 slide along the slide rod 701, and the support wheel 4 moves along with the movable seats 703. 03. The multiple sets of support wheels 4 are moved to increase the spacing and distribution distance until the distribution distance matches the length of the cylindrical welded pipe. During the movement of the multiple sets of moving seats 703, two sets of moving seats 703 drive two sets of connecting rods 504 to move. The connecting rods 504 drive the movable frame 502 to slide along the slide rail 501. At the same time, the movable frame 502 drives the corresponding laser 6 to move, so that the laser 6 moves as the distribution distance of the multiple sets of support wheels 4 increases, thereby enabling the measurement of excessively long cylindrical welded pipes. When the outer diameter of the cylindrical welded pipe increases, the double threaded screw 7022 is rotated, causing the two sets of active supports 7023 to move in opposite directions along the guide rod 7025. At the same time, the distance between the two sets of support wheels 4 increases as the two sets of active supports 7023 move. The two sets of support wheels 4 drive the two sets of transmission rollers 3 to move in opposite directions, and the two sets of transmission rollers 3 drive the other two sets of support wheels 4 to move in opposite directions. The multiple sets of support wheels 4 drive the corresponding driven supports 7033 to slide along the guide rail 7032. At the same time, the transmission rollers 3 drive the support seats 201 at both ends to slide along the guide post 203, so that the distance between the two sets of support wheels 4 can be stably increased. After the distance is increased, the two sets of support wheels 4 can support the cylindrical welded pipe with a larger outer diameter, ensuring that the cylindrical welded pipe with a larger outer diameter can rotate stably.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the runout dimension of welded pipes, comprising a base (1), characterized in that: Two sets of support frames (2) are symmetrically installed on the base (1). Two sets of transmission rollers (3) are rotatably installed between the two sets of support frames (2). Several sets of support wheels (4) for supporting the welded pipe are installed on the transmission rollers (3). The base (1) is also equipped with a mounting frame (5). Three sets of lasers (6) are installed at equal intervals on the mounting frame (5). The laser (6) is located directly above the two sets of transmission rollers (3).

2. The welded pipe runout measurement device according to claim 1, characterized in that: An arrangement mechanism (7) is provided below the two sets of transmission rollers (3). The arrangement mechanism (7) includes two sets of slide rods (701), which are symmetrically installed on the base (1). A fixed base (702) is fixedly connected to the middle parts of two sets of sliding rods (701) at both ends. Two sets of support wheels (4) are symmetrically rotatably mounted on the fixed base (702). Multiple sets of movable seats (703) are evenly distributed on both sides of the fixed seat (702). Two sets of sliding rods (701) are slidably connected at both ends of the movable seat (703). Two sets of support wheels (4) are symmetrically rotatably mounted on the movable seat (703). A pin (704) is fixedly installed at the bottom of the fixed base (702); Two sets of scissor-type telescopic frames (705), one end of each set of scissor-type telescopic frames (705) is hinged to the pin (704), and multiple sets of nodes on the scissor-type telescopic frames (705) are respectively connected to the bottom of multiple sets of movable seats (703); Two sets of support seats (706) are fixedly installed at both ends of the bottom of the fixed seat (702).

3. The welded pipe runout measurement device according to claim 2, characterized in that: The two sets of support seats (706) support the fixed seat (702). Three sets of guide strips (301) are set at equal angles on the transmission roller (3). Three sets of guide grooves (401) are opened on the inner ring of the support wheel (4). The three sets of guide grooves (401) are slidably connected to the three sets of guide strips (301).

4. The welded pipe runout measurement device according to claim 3, characterized in that: A driving mechanism (8) is provided below the arrangement mechanism (7). The driving mechanism (8) includes a screw rod (806), which is rotatably installed in the base (1). The first bevel gear (801) is fixedly connected to one end of the screw rod (806); Two sets of second bevel gears (802) mesh with the first bevel gear (801); The first lead screw (803) is fixedly connected to the second bevel gear (802); The slider (804) is screwed to the first lead screw (803); Rotate the support rod (805) mounted on the slider (804), the upper end of the support rod (805) is fixedly connected to a set of nodes on the cross-scissor telescopic frame (705).

5. The welded pipe runout measurement device according to claim 4, characterized in that: The base (1) is symmetrically provided with two sets of mounting slots (101), and the two sets of first lead screws (803) are respectively rotatably installed in the two sets of mounting slots (101).

6. The welded pipe runout measurement device according to claim 5, characterized in that: The mounting bracket (5) includes a slide rail (501), which is fixedly mounted on the base (1); Two sets of movable frames (502) are symmetrically slidably mounted on the slide rail (501), and the two sets of lasers (6) are respectively mounted on the two sets of movable frames (502); A fixed frame (503) is set between the two sets of movable frames (502), the fixed frame (503) is fixedly installed at the middle of the slide rail (501), and a set of lasers (6) is installed on the fixed frame (503).

7. The welded pipe runout measurement device according to claim 6, characterized in that: Each of the movable frames (502) is equipped with a connecting rod (504), and the two sets of connecting rods (504) connect the two sets of movable seats (703).

8. The welded pipe runout measurement device according to claim 7, characterized in that: The fixed base (702) includes a horizontal plate (7021), and two sets of sliding rods (701) are fixedly connected to both ends of the horizontal plate (7021); Rotate the double-threaded lead screw (7022) mounted on the cross plate (7021); Two sets of active brackets (7023) are screwed onto the double threaded screw (7022), and a support wheel (4) is rotatably mounted on the active bracket (7023); A rectangular groove (7024) is formed on the horizontal plate (7021), and a guide rod (7025) is installed in the rectangular groove (7024). The active bracket (7023) is slidably connected to the active bracket (7023).

9. A welded pipe runout measurement device according to claim 8, characterized in that: The movable seat (703) includes a driven plate (7031), and two sets of slide rods (701) are slidably connected at both ends of the driven plate (7031). A guide rail (7032) is fixedly installed on the driven plate (7031); Two sets of driven brackets (7033) are symmetrically slidably mounted on the guide rail (7032), and a support wheel (4) is rotatably mounted on the driven bracket (7033).

10. A welded pipe runout measurement device according to claim 9, characterized in that: The support frame (2) includes two sets of support seats (201), and both ends of the two sets of transmission rollers (3) are rotatably connected to the support seats (201). A through hole (202) is formed on the support (201); The guide post (203) is slidably connected to the through hole (202), and the guide post (203) is fixedly installed on the base (1).

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