A device for on-line measurement of the inner diameter of a steel pipe

Abstract

The utility model discloses a kind of steel pipe inner diameter on-line measuring device, including base, mobile body, height adjuster, extension bar and measuring head, the beneficial effect of the utility model is in at:Steel pipe inner diameter on-line measuring device only needs to be in-depth steel pipe can automatically calculate steel pipe inner diameter, improve the efficiency of measurement;Without manual operation, through laser range finder to 15 as a unit rotation one week measured 24 points distance, manual measurement cannot appear the misoperation of bringing, and measuring head can be frequently disassembled without affecting measurement accuracy.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe inner diameter measurement technology, specifically an online steel pipe inner diameter measurement device. Background Technology

[0002] In modern industrial systems, steel pipes are core basic components in fields such as fluid transportation, structural support, and machinery manufacturing. The precise control of their inner diameter directly affects the system's operating efficiency, safety performance, and service life, making steel pipe inner diameter measurement technology a key link in the industrial quality control system.

[0003] From an application perspective, the precision requirements for the inner diameter of steel pipes vary significantly across different fields: In oil and gas pipelines, the uniformity of the inner diameter directly affects the medium flow rate and pressure loss; millimeter-level deviations can lead to a surge in energy consumption or pipe wear caused by localized turbulence. In high-pressure environments such as nuclear power and chemical plants, out-of-tolerance inner diameter dimensions can cause sealing failures, leading to leaks and other safety accidents. In precision machinery manufacturing (such as hydraulic cylinder barrels and bearing rings), the inner diameter tolerance needs to be controlled at the micrometer level to ensure fitting accuracy and motion stability. Furthermore, during the rolling and heat treatment processes, steel pipes are prone to shape deviations such as ellipticity and taper due to factors such as material plastic deformation and temperature stress, further increasing the complexity of inner diameter measurement.

[0004] Traditional measurement methods (such as calipers and plug gauges), while simple to operate, have limitations such as low efficiency, reliance on human experience, and difficulty in capturing the entire length of the inner diameter distribution. This is especially true for the inspection of large-diameter steel pipes (over 1 meter in diameter) or extra-long steel pipes (over 10 meters in length), where not only is the labor intensity high, but the completeness and consistency of the measurement data are also difficult to guarantee. Measuring tools need to be handled and replaced manually, and prolonged use can affect their accuracy; manual measurement requires waiting for the temperature to completely cool down, impacting measurement efficiency; and manual measurement of steel pipes with different inner diameters severely tests the measurer's skill level, resulting in poor accuracy.

[0005] With the advancement of industrial automation and intelligent manufacturing, production lines are increasingly demanding "online detection, real-time feedback, and data traceability." This requires measurement technology to break through the limitations of traditional contact measurement and upgrade towards non-contact, high-speed, and intelligent methods. At the same time, the application of new materials (such as high-strength alloy steel pipes) has improved the hardness and surface finish of steel pipes, placing higher demands on the wear resistance and anti-interference capabilities of measuring tools. Utility Model Content

[0006] The purpose of this invention is to solve the existing problems by providing an online measuring device for the inner diameter of steel pipes.

[0007] The technical solution of this utility model is as follows:

[0008] An online measuring device for the inner diameter of a steel pipe includes a base, a movable body, a height adjuster, an extension rod, and a measuring head. The movable body is slidably mounted on the base, the height adjuster is rotatably mounted on the movable body, and the extension rod is fixed to the end of the height adjuster. The measuring head consists of a motor bracket, an outer protective sleeve, an inner protective sleeve, a servo motor, a motor mounting plate, a connecting flange, a rotating frame, a rangefinder mounting plate, and a laser rangefinder. The motor bracket is a pipe body, one end of which has an external thread and a shoulder, and the other end is screwed to the motor mounting plate. The external thread end is screwed to the end face of the extension rod. The servo motor is fixed inside the motor mounting plate. The inner protective sleeve is inserted into the outer wall of the pipe body, and the outer protective sleeve is inserted into the outer wall of the shoulder. The shaft of the servo motor is fixed to the connecting flange, the rotating frame is fixed to the outer wall of the connecting flange, and the laser rangefinder is fixed to the top and bottom surfaces of the rangefinder mounting plate.

[0009] Preferably, the base is provided with a guide rail, and the moving body is provided with a slider, and the moving body moves linearly along the guide rail.

[0010] Preferably, the movable body is provided with a bearing seat, and the height adjuster is rotatably connected to the bearing seat via a rotating shaft, which is driven by a motor mounted on the movable body.

[0011] Preferably, the extension rod is a hollow tube with an internal thread at its end for connection with the measuring head.

[0012] Preferably, the height adjuster and the extension rod are fixedly connected by a pipe clamp.

[0013] Preferably, the left side of the outer protective sleeve is flush with the shoulder of the shaft, and the right side is 1mm away from the rotating frame.

[0014] Preferably, the rangefinder mounting plate and rotating frame are provided with grooves for fixing the data cable.

[0015] Preferably, the data cable is connected to an external display via a motor bracket and an extension rod.

[0016] Preferably, the tube body is provided with heat dissipation grooves, and both the outer protective sleeve and the inner protective sleeve are provided with a number of heat dissipation holes.

[0017] The beneficial effects of this utility model are as follows:

[0018] The online steel pipe inner diameter measuring device can automatically calculate the inner diameter of the steel pipe simply by inserting it into the pipe, which improves the measurement efficiency. No manual operation is required. The distance of 24 points is measured by rotating the laser rangefinder in 15° units, which eliminates the errors caused by manual measurement. Moreover, the measuring head can be frequently disassembled and assembled without affecting the measurement accuracy. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0020] Figure 2 This is a three-dimensional schematic diagram of the present invention;

[0021] Figure 3 This is an exploded view of the present invention;

[0022] Figure 4 This is a three-dimensional schematic diagram of the measuring head of this utility model;

[0023] Figure 5 This is an exploded view of the measuring head of this utility model;

[0024] In the attached diagram: 1. Base; 2. Moving body; 3. Height adjuster; 4. Extension rod; 5. Measuring head; 6. Motor bracket; 7. Outer protective sleeve; 8. Inner protective sleeve; 9. Servo motor; 10. Motor mounting plate; 11. Connecting flange; 12. Rotating frame; 13. Rangefinder mounting plate; 14. Laser rangefinder; 15. External thread; 16. Shoulder; 17. Guide rail; 18. Bearing housing; 19. Motor; 20. Pipe clamp. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not 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.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] 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.

[0030] like Figure 1-5 As shown, an online steel pipe inner diameter measuring device includes a base 1, a movable body 2, a height adjuster 3, an extension rod 4, and a measuring head 5. The movable body 2 is slidably disposed on the base 1, the height adjuster 3 is rotatably mounted on the movable body 2, and the extension rod 4 is fixed to the end of the height adjuster 3. The measuring head 5 is composed of a motor bracket 6, an outer protective sleeve 7, an inner protective sleeve 8, a servo motor 9, a motor mounting plate 10, a connecting flange 11, a rotating frame 12, a rangefinder mounting plate 13, and a laser rangefinder 14. 6 is a tube body, one end of which is provided with an external thread 15 and a shoulder 16, and the other end is screwed to a motor mounting plate 10. The end of the external thread 15 is screwed to the end face of the extension rod 4. The servo motor 9 is fixed inside the motor mounting plate 10. The inner protective sleeve 8 is inserted into the outer wall of the tube body, and the outer protective sleeve 7 is inserted into the outer wall of the shoulder 16. The rotating shaft of the servo motor 9 is fixed to the connecting flange 11. The rotating frame 12 is fixed to the outer wall of the connecting flange 11. The laser rangefinder 14 is fixed to the top and bottom surfaces of the rangefinder mounting plate 13.

[0031] Specifically, the base 1 is provided with a guide rail 17, and the movable body 2 is provided with a slider, and the movable body 2 moves linearly along the guide rail 17.

[0032] Specifically, the movable body 2 is provided with a bearing seat 18, and the height adjuster 3 is rotatably connected to the bearing seat 18 via a rotating shaft, which is driven by a motor 19 mounted on the movable body 2.

[0033] Specifically, the extension rod 4 is a hollow tube with an internal thread at its end for connection with the measuring head 5.

[0034] Specifically, the height adjuster 3 and the extension rod 4 are fixedly connected by a pipe clamp 20.

[0035] Specifically, the outer protective sleeve 7 is flush with the shoulder 16 on the left side and 1mm away from the rotating frame 12 on the right side.

[0036] Specifically, the rangefinder mounting plate 13 and the rotating frame 12 are provided with grooves for fixing the data cable.

[0037] Specifically, the data cable is connected to an external display via the motor bracket 6 and the extension rod 4.

[0038] Specifically, the tube body is provided with heat dissipation grooves, and both the outer protective sleeve and the inner protective sleeve are provided with a number of heat dissipation holes.

[0039] During operation, the moving body 2 moves via the guide rail 17. The measuring head 5 only needs to be inserted into the steel pipe without needing to be precisely aligned with its center. Furthermore, the height adjuster 3 can be rotated via the motor 19 to adjust the height of the measuring head 5, allowing for adaptive adjustment of the measuring diameter to accommodate steel pipes of different diameters. The servo motor 9, through electronic control, rotates 15° increments to measure the distance at 24 points. The laser rangefinder 14 transmits the measured distance data to the control system, which then processes it according to a preset algorithm.

[0040] ; The inner diameter of the steel pipe is calculated, and the measurement results are displayed in real time on a screen to ensure measurement accuracy and efficiency.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 online measuring device for the inner diameter of steel pipes, characterized in that: The device includes a base, a movable body, a height adjuster, an extension rod, and a measuring head. The movable body is slidably mounted on the base, the height adjuster is rotatably mounted on the movable body, and the extension rod is fixed to the end of the height adjuster. The measuring head consists of a motor bracket, an outer protective sleeve, an inner protective sleeve, a servo motor, a motor mounting plate, a connecting flange, a rotating frame, a rangefinder mounting plate, and a laser rangefinder. The motor bracket is a tube with an external thread and a shoulder at one end and a motor mounting plate screwed to the other end. The external thread end is screwed to the end face of the extension rod. The servo motor is fixed inside the motor mounting plate. The inner protective sleeve is inserted into the outer wall of the tube, and the outer protective sleeve is inserted into the outer wall of the shoulder. The shaft of the servo motor is fixed to the connecting flange, the rotating frame is fixed to the outer wall of the connecting flange, and the laser rangefinder is fixed to the top and bottom surfaces of the rangefinder mounting plate.

2. The online steel pipe inner diameter measuring device according to claim 1, characterized in that: The base is provided with a guide rail, and the moving body is provided with a slider, and the moving body moves linearly along the guide rail.

3. The online steel pipe inner diameter measuring device according to claim 1, characterized in that: The moving body is provided with a bearing seat, and the height adjuster is rotatably connected to the bearing seat via a rotating shaft, which is driven by a motor mounted on the moving body.

4. The online steel pipe inner diameter measuring device according to claim 1, characterized in that: The extension rod is a hollow tube with an internal thread at its end for connection with the measuring head.

5. The online steel pipe inner diameter measuring device according to claim 1, characterized in that: The height adjuster and the extension rod are fixedly connected by a pipe clamp.

6. The online steel pipe inner diameter measuring device according to claim 1, characterized in that: The outer protective sleeve is flush with the shoulder on the left and 1mm away from the rotating frame on the right.

7. The online steel pipe inner diameter measuring device according to claim 1, characterized in that: The rangefinder mounting plate and rotating frame have grooves for fixing the data cable.

8. The online steel pipe inner diameter measuring device according to claim 7, characterized in that: The data cable is connected to an external display via a motor bracket and an extension rod.

9. The online steel pipe inner diameter measuring device according to claim 1, characterized in that: The tube body is provided with heat dissipation grooves, and both the outer protective sleeve and the inner protective sleeve are provided with a number of heat dissipation holes.

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