A device for detecting the straightness of a seamless steel pipe

Abstract

The utility model relates to the field of seamless steel pipe detection technique, the utility model provides a kind of straightness detection device of seamless steel pipe, including base, the top of base is fixedly connected with measuring table, the surface of measuring table is fixedly connected with servo motor by bolt, the output of servo motor is fixedly connected with screw rod, the surface of screw rod is threadedly connected with moving platform, the bottom of moving platform is fixedly installed with hydraulic rod one, the output of hydraulic rod one is fixedly connected with detection table, the inner wall of detection table is fixedly installed with laser ranging sensor.The utility model is provided with two laser ranging sensors with detection table front center symmetry distribution, is driven screw rod rotation by servo motor to drive moving platform and the detection table of its bottom left and right movement, make two laser ranging sensors to steel pipe left and right end multiple point position synchronous distance measurement, according to the difference between the measurement of two laser ranging sensors to the straightness of steel pipe is detected.

Description

Technical Field

[0001] This utility model relates to the field of seamless steel pipe testing technology, specifically to a device for testing the straightness of seamless steel pipes. Background Technology

[0002] Seamless steel pipes, as a key industrial material, are widely used in high-end fields such as oil drilling and extraction, chemical equipment, boiler manufacturing, machining, and building structures. Their quality directly affects the safe operation of equipment and the stability of engineering structures. Straightness is an important indicator for measuring the geometric accuracy of seamless steel pipes. If bending deformation exists, it will lead to problems such as assembly difficulties, stress concentration, and sealing failure. Especially under high pressure, high temperature, or precision fitting conditions, it may cause serious safety accidents. Traditional inspection methods rely on manual comparison using calipers, rulers, or platforms, which is not only time-consuming and labor-intensive but also easily affected by human factors, making it difficult to meet the requirements of modern industrial large-scale production and high-precision quality control.

[0003] Existing straightness testing devices generally suffer from insufficient automation and adaptability. On the one hand, single-point or manual moving measurement methods are inefficient and cannot achieve continuous multi-point synchronous testing along the pipe axis, resulting in limited testing accuracy and easy omission of local deformations. On the other hand, steel pipe fixing mechanisms mostly use rigid clamps or V-blocks, which are difficult to automatically adapt to different pipe diameters and are cumbersome to center, often affecting measurement accuracy due to clamping deviation or unstable positioning. Utility Model Content

[0004] To overcome the above-mentioned defects, the embodiments of this utility model provide a seamless steel pipe straightness detection device, which solves the technical problems of low efficiency of single-point or manual moving measurement methods in related technologies / existing technologies, inability to achieve continuous multi-point synchronous detection along the pipe axis, and the fact that steel pipe fixing mechanisms mostly use rigid clamps or V-blocks, which are difficult to automatically adapt to different pipe diameter specifications and have cumbersome centering adjustments.

[0005] This utility model is achieved using the following technical solution: a seamless steel pipe straightness detection device, comprising a base, a measuring platform fixedly connected to the top of the base, a servo motor fixedly connected to the surface of the measuring platform by bolts, a lead screw fixedly connected to the output end of the servo motor, a moving platform threadedly connected to the surface of the lead screw, a hydraulic rod fixedly installed at the bottom of the moving platform, a detection platform fixedly connected to the output end of the hydraulic rod, a laser rangefinder sensor fixedly installed on the inner wall of the detection platform, a conveyor platform fixedly connected to the top of the base, a fixed column fixedly connected to the inner wall of the conveyor platform, rollers rotatably connected to the surface of the fixed column, and two symmetrically distributed fixing components fixedly installed inside the measuring platform.

[0006] Through the above technical solution, the base provides overall support stability, the measuring table and the conveying table construct the detection space, the servo motor and the lead screw drive the moving table to achieve horizontal displacement, the hydraulic rod adjusts the height of the detection table to adapt to different pipe diameters, the dual laser rangefinders detect straightness through the differential measurement principle, the rollers facilitate the positioning of the steel pipe, the dual fixing parts realize the centering and fixing of the steel pipe, and the various components work together to form an automated detection system, which significantly improves detection efficiency and accuracy. The servo motor and the hydraulic rod are electrically connected to an external power source.

[0007] As a further improvement to the above solution, the lead screw is located inside the measuring platform, and two laser rangefinders are provided, which are symmetrically distributed around the center of the front of the measuring platform.

[0008] Through the above technical solution, the dual laser ranging sensors are centrally symmetrically distributed to achieve synchronous measurement on both sides of the steel pipe, directly obtain the difference data to determine the straightness, improve the measurement accuracy, and the two laser ranging sensors are electrically connected to the same controller.

[0009] As a further improvement to the above solution, the conveyor is located at the center of the bottom of the testing platform, and the number of fixed columns is set to several, which are symmetrically distributed around the center of the top of the conveyor.

[0010] Through the above technical solution, the conveyor is located at the center of the bottom of the testing platform to ensure accurate measurement, and multiple fixed columns and rollers are symmetrically distributed to provide stable multi-point support for the steel pipe, ensuring smooth conveying and stable measurement position.

[0011] As a further improvement to the above solution, a slider is fixedly connected to the top of the mobile platform, and a slide rail is slidably connected to the surface of the slider.

[0012] The above technical solution involves setting a slider on the top of the moving stage and sliding it to the slide rail, which restricts the moving stage to only horizontal linear motion, prevents deflection when driven by the lead screw, and ensures that the moving stage moves smoothly and accurately.

[0013] As a further improvement to the above solution, the fixing component includes a mounting plate, a hydraulic rod II is fixedly mounted on the bottom of the mounting plate, a mounting platform is fixedly connected to the output end of the hydraulic rod II, sliding sleeves are fixedly connected to both ends of the mounting platform, a sliding rod is slidably connected inside the sliding sleeve, a trapezoidal platform is fixedly connected to the end of the sliding rod away from the inner wall of the mounting platform, and a spring is sleeved on the surface of the sliding rod.

[0014] Through the above technical solution, the fastener adopts a structural design of mounting plate support, hydraulic rod dual drive, mounting platform bearing, sliding sleeve and sliding rod guidance, trapezoidal platform contact clamping, and spring adaptive buffer, forming a complete adaptive clamping mechanism that can automatically center and fix steel pipes of different diameters.

[0015] As a further improvement to the above solution, the number of sliding sleeves is set to four, and the four sliding sleeves are distributed symmetrically at the left and right ends of the top of the mounting platform in pairs.

[0016] With the above technical solution, the four sliding sleeves are symmetrically distributed in pairs at the left and right ends of the mounting platform, providing four stable guides for the trapezoidal platform, ensuring a balanced distribution of clamping force, and preventing clamping deviation or jamming.

[0017] As a further improvement to the above solution, the sliding rod passes through the inner wall of the mounting platform, and the left and right ends of the spring are respectively fixedly connected to the trapezoidal platform and the inner wall of the mounting platform that are close to each other.

[0018] Through the above technical solution, the sliding rod passes through the inner wall of the mounting platform to achieve telescopic sliding. The two ends of the spring are connected to the trapezoidal platform and the inner wall of the mounting platform respectively, providing elastic buffer and restoring force when in contact with the steel pipe, protecting the surface of the steel pipe and achieving centering and fixing.

[0019] As a further improvement to the above solution, a limiting sleeve is fixedly connected to the bottom of the mounting plate, and a limiting rod is slidably connected inside the limiting sleeve.

[0020] Through the above technical solution, a limit sleeve is set at the bottom of the mounting plate and slides to connect with the limit rod, which restricts the rotational freedom of the mounting platform when it is raised and lowered, and ensures that the mounting platform only moves vertically when the hydraulic rod is driven by two forces.

[0021] As a further improvement to the above solution, the number of the limiting sleeves is set to two, and the two limiting sleeves are symmetrically distributed around the top center of the base. The top of the limiting rod passes through the mounting plate, and the bottom of the limiting rod is fixedly connected to the top of the mounting platform.

[0022] Through the above technical solution, the two limiting sleeves are symmetrically distributed in the center, the top of the limiting rod penetrates through the mounting plate and the bottom is fixedly connected to the top of the mounting platform, forming a double-point guide anti-rotation structure, which improves the stability of the lifting movement of the mounting platform.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention uses two laser rangefinders symmetrically distributed around the center of the front of the testing platform. A servo motor drives a lead screw to rotate, causing the moving platform and the testing platform at its bottom to move left and right. This allows the two laser rangefinders to simultaneously measure the distance between multiple points on both sides of the steel pipe. The straightness of the steel pipe is then detected based on the difference between the measurements taken by the two laser rangefinders.

[0024] This utility model uses two symmetrically distributed fixing components installed inside the measuring platform. Each fixing component consists of a mounting plate, a second hydraulic rod, a mounting platform, a sliding sleeve, a sliding rod, a trapezoidal platform, and a spring. When the second hydraulic rod moves the mounting platform downward, the surface of the trapezoidal platform contacts the surface of the steel pipe. The sliding rod slides on the inner wall of the mounting platform, compressing the spring. Through the two sets of fixing components, the steel pipe is automatically centered and fixed at the top center of the conveying platform, achieving the effects of adapting to steel pipes of different diameters, automatic centering and fixing, and ensuring measurement stability. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of a device according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the overall internal structure of the device in the embodiment; Figure 3 This is a schematic diagram of the overall connection structure of the lead screw of this utility model; Figure 4 for Figure 3 A schematic diagram of the overall structure of the fastener in an embodiment; In the diagram: 1. Base; 2. Measuring platform; 3. Servo motor; 4. Lead screw; 5. Moving platform; 6. Hydraulic rod one; 7. Detection platform; 8. Laser rangefinder sensor; 9. Conveyor platform; 10. Fixed column; 11. Roller; 12. Slider; 13. Slide rail; 14. Mounting plate; 15. Hydraulic rod two; 16. Mounting platform; 17. Sliding sleeve; 18. Sliding rod; 19. Trapezoidal platform; 20. Spring; 21. Limiting sleeve; 22. Limiting rod. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0028] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0029] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0032] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] like Figures 1-3As shown, this invention illustrates a seamless steel pipe straightness testing device according to one embodiment of the present invention. The device includes a base 1, a measuring platform 2 fixedly connected to the top of the base 1, a servo motor 3 fixedly connected to the surface of the measuring platform 2 by bolts, a lead screw 4 fixedly connected to the output end of the servo motor 3, a moving platform 5 threadedly connected to the surface of the lead screw 4, a hydraulic rod 6 fixedly installed at the bottom of the moving platform 5, a testing platform 7 fixedly connected to the output end of the hydraulic rod 6, a laser rangefinder sensor 8 fixedly installed on the inner wall of the testing platform 7, a conveyor platform 9 fixedly connected to the top of the base 1, a fixed column 10 fixedly connected to the inner wall of the conveyor platform 9, rollers 11 rotatably connected to the surface of the fixed column 10, and two symmetrically distributed fixing components fixedly installed inside the measuring platform 2.

[0034] This embodiment provides a testing platform 7. A hydraulic rod 6 is activated, causing the testing platform 7 to move downwards, simultaneously moving the conveyor platform 9 downwards until the laser rangefinder 8 is positioned at the center of the steel surface. Then, a servo motor 3 is activated, and its output drives a lead screw 4 to rotate. This rotation of the lead screw 4 causes the moving platform 5 to move left and right on its surface, simultaneously causing the laser rangefinder 8 to detect multiple points on both ends of the steel pipe. The laser rangefinder 8 also measures the distance between itself and both ends of the steel pipe. The straightness of the steel pipe is then determined based on the difference between the measurements taken by the two laser rangefinders 8. Furthermore, the lead screw 4 is located inside the measuring platform 2, and there are two laser rangefinders 8. The two laser rangefinders 8 are symmetrically distributed around the front center of the measuring platform 7. The lead screw 4 is built into the measuring platform 2 to save space and protect the transmission components. The symmetrical distribution of the two laser rangefinders 8 enables synchronous measurement on both sides of the steel pipe, directly obtains the difference data to determine the straightness, and improves the measurement accuracy.

[0035] Furthermore, the conveyor 9 is located at the bottom center of the testing platform 7, and a number of fixed columns 10 are provided. The fixed columns 10 are symmetrically distributed around the top center of the conveyor 9. The conveyor 9 is located at the bottom center of the testing platform 7 to ensure measurement alignment. The multiple fixed columns 10 and rollers 11 are symmetrically distributed to provide stable multi-point support for the steel pipe, ensuring smooth conveying and stable measurement position.

[0036] refer to Figure 3 In some embodiments, a slider 12 is fixedly connected to the top of the moving stage 5, and a slide rail 13 is slidably connected to the surface of the slider 12. The slider 12 and the slide rail 13 are slidably connected at the top of the moving stage 5, which restricts the moving stage 5 to only make horizontal linear movements, prevents deflection when driven by the lead screw 4, and ensures that the detection stage 7 moves smoothly and accurately.

[0037] refer to Figure 4In some embodiments, the fixing member includes a mounting plate 14, a hydraulic rod 15 is fixedly mounted on the bottom of the mounting plate 14, a mounting platform 16 is fixedly connected to the output end of the hydraulic rod 15, a sliding sleeve 17 is fixedly connected to both the left and right ends of the mounting platform 16, a sliding rod 18 is slidably connected inside the sliding sleeve 17, a trapezoidal platform 19 is fixedly connected to the end of the sliding rod 18 away from the inner wall of the mounting platform 16, and a spring 20 is sleeved on the surface of the sliding rod 18.

[0038] In this embodiment, when inspecting seamless steel pipes, the steel pipe is first placed on top of roller 11 and transported to the inside of measuring platform 2 by roller 11. Hydraulic rod 15 is activated, and the output end of hydraulic rod 15 drives mounting platform 16 to move downward until the surface of trapezoidal platform 19 contacts the surface of steel pipe. During the pressing process of trapezoidal platform 19 on steel pipe, slide rod 18 slides inside trapezoidal platform 19, and spring 20 is compressed. Through the two sets of fixing members, the steel pipe is fixed at the top center position of conveying platform 9.

[0039] Furthermore, the number of sliding sleeves 17 is set to four. The four sliding sleeves 17 are symmetrically distributed at the left and right ends of the top center of the mounting platform 16 in pairs. The four sliding sleeves 17 are symmetrically distributed at the left and right ends of the mounting platform 16 in pairs, providing four-point stable guidance for the trapezoidal platform 19, ensuring a balanced distribution of clamping force, and preventing clamping deviation or jamming.

[0040] Furthermore, the slide rod 18 penetrates the inner wall of the mounting platform 16, and the left and right ends of the spring 20 are respectively fixedly connected to the ends of the trapezoidal platform 19 and the inner wall of the mounting platform 16 that are close to each other. The slide rod 18 penetrates the inner wall of the mounting platform 16 to achieve telescopic sliding, and the two ends of the spring 20 are respectively connected to the trapezoidal platform 19 and the inner wall of the mounting platform 16, providing elastic buffer and restoring force when in contact with the steel pipe, protecting the surface of the steel pipe and achieving centering and fixing.

[0041] Furthermore, a limiting sleeve 21 is fixedly connected to the bottom of the mounting plate 14, and a limiting rod 22 is slidably connected inside the limiting sleeve 21. The limiting sleeve 21 and the limiting rod 22 are slidably connected at the bottom of the mounting plate 14 to limit the rotational freedom of the mounting platform 16 when it is raised and lowered, so as to ensure that the mounting platform 16 only moves vertically when the hydraulic rod 2 15 is driven.

[0042] Furthermore, there are two limiting sleeves 21, which are symmetrically distributed around the top center of the base 1. The top of the limiting rod 22 passes through the mounting plate 14, and the bottom of the limiting rod 22 is fixedly connected to the top of the mounting platform 16.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for detecting the straightness of seamless steel pipes, characterized in that, The device includes a base (1), a measuring platform (2) fixedly connected to the top of the base (1), a servo motor (3) fixedly connected to the surface of the measuring platform (2) by bolts, a lead screw (4) fixedly connected to the output end of the servo motor (3), a moving platform (5) threadedly connected to the surface of the lead screw (4), a hydraulic rod (6) fixedly installed at the bottom of the moving platform (5), a detection platform (7) fixedly connected to the output end of the hydraulic rod (6), a laser range sensor (8) fixedly installed on the inner wall of the detection platform (7), a conveyor platform (9) fixedly connected to the top of the base (1), a fixed column (10) fixedly connected to the inner wall of the conveyor platform (9), a roller (11) rotatably connected to the surface of the fixed column (10), and two symmetrically distributed fixing parts fixedly installed inside the measuring platform (2).

2. The seamless steel pipe straightness testing device as described in claim 1, characterized in that: The lead screw (4) is located inside the measuring platform (2), and there are two laser rangefinders (8), which are symmetrically distributed around the front center of the measuring platform (7).

3. The seamless steel pipe straightness testing device as described in claim 1, characterized in that: The conveyor platform (9) is located at the bottom center of the detection platform (7), and the number of fixed columns (10) is set to a certain number, which are symmetrically distributed around the top center of the conveyor platform (9).

4. The seamless steel pipe straightness testing device as described in claim 1, characterized in that: The top of the mobile platform (5) is fixedly connected to a slider (12), and the surface of the slider (12) is slidably connected to a slide rail (13).

5. The seamless steel pipe straightness testing device as described in claim 1, characterized in that: The fastener includes a mounting plate (14), a hydraulic rod (15) is fixedly mounted on the bottom of the mounting plate (14), a mounting platform (16) is fixedly connected to the output end of the hydraulic rod (15), a sliding sleeve (17) is fixedly connected to both the left and right ends of the mounting platform (16), a sliding rod (18) is slidably connected inside the sliding sleeve (17), a trapezoidal platform (19) is fixedly connected to the end of the sliding rod (18) away from the inner wall of the mounting platform (16), and a spring (20) is sleeved on the surface of the sliding rod (18).

6. The seamless steel pipe straightness testing device as described in claim 5, characterized in that: The number of the sliding sleeves (17) is set to four, and the four sliding sleeves (17) are arranged in pairs and symmetrically distributed at the left and right ends of the top center of the mounting platform (16).

7. The seamless steel pipe straightness testing device as described in claim 5, characterized in that: The slide bar (18) passes through the inner wall of the mounting platform (16), and the left and right ends of the spring (20) are respectively fixedly connected to the trapezoidal platform (19) and the inner wall of the mounting platform (16) at the ends that are close to each other.

8. The seamless steel pipe straightness testing device as described in claim 5, characterized in that: The bottom of the mounting plate (14) is fixedly connected to a limiting sleeve (21), and the inside of the limiting sleeve (21) is slidably connected to a limiting rod (22).

9. The seamless steel pipe straightness testing device as described in claim 8, characterized in that: The number of the limiting sleeves (21) is set to two, and the two limiting sleeves (21) are symmetrically distributed around the top center of the base (1). The top of the limiting rod (22) passes through the mounting plate (14), and the bottom of the limiting rod (22) is fixedly connected to the top of the mounting platform (16).

Images