Steel pipe rotating speed measuring device of automatic ultrasonic flaw detector

Abstract

The utility model discloses a steel pipe rotating speed measuring device of an automatic ultrasonic flaw detector. The steel pipe rotating speed measuring device is characterized by comprising a rotating plug, a top plate, a photoelectric sensor, a rotating speed display and a linear guide rail, the rotary plug is arranged at the head of the steel pipe and rotates forwards along with the steel pipe; the rotary plug abuts against the top plate, and a light reflecting element is axially arranged on the outer surface of the rotary plug. The photoelectric sensor is arranged on the top plate and is matched with the reflective element; the rotating speed display displays the rotating speed of the steel pipe according to a detection signal of the photoelectric sensor; the top plate is arranged on the linear guide rail and moves along the linear guide rail. According to the utility model, the reflective element arranged on the rotary plug is matched with the photoelectric sensor on the top plate which moves forwards synchronously along with the steel pipe, so that the real-time monitoring of the rotating speed of the steel pipe of the automatic ultrasonic flaw detector for the steel pipe is realized. Meanwhile, the situation that the end of the small-caliber steel pipe swings during flaw detection can be relieved. The device is simple in structure and stable in work.

Description

TECHNICAL FIELD

[0001] The utility model belongs to steel pipe ultrasonic inspection technical field, in particular, relate to a sink formula steel pipe automatic ultrasonic flaw detector steel pipe rotation speed automatic measuring device. BACKGROUND

[0002] As Figure 1 , 2 As shown in the current domestic use sink formula steel pipe automatic ultrasonic flaw detector adopts detection probe fixed, steel pipe spiral advance mode, ultrasonic detection probe forms spiral scanning track on the surface of steel pipe, to realize the flaw detection of probe to steel pipe. This type ultrasonic flaw detection equipment is in contact with the upper and lower rollers and the outer surface of steel pipe, utilizes the friction force generated when the rotating roller and steel pipe contact to make steel pipe rotate, and deflects the rotating roller to make steel pipe produce rotating power. Because the roller will be worn or loose after long time use, and the roughness of steel pipe surface influences, the friction force generated by the roller to steel pipe is unstable, and further makes the rotation speed of steel pipe unstable.

[0003] When automatic ultrasonic flaw detection, probe needs to cover the surface of steel pipe to realize the correctness of flaw detection result, that is, the scanning pitch formed by probe relative to pipe material must be less than the axial size of probe wafer to satisfy the axial full coverage when steel pipe advances, the transverse size of probe and the repetition frequency of probe ultrasonic excitation must reach a certain value to satisfy the circumferential full coverage when steel pipe rotates, so whether the steel pipe rotates stably during ultrasonic flaw detection is particularly important. SUMMARY

[0004] The utility model discloses to the need of sink formula steel pipe automatic ultrasonic flaw detector steel pipe rotation speed monitoring, provide a kind of rotation speed of steel pipe real-time measurement, the stability of observation inspection system, ensure the correctness of ultrasonic flaw detection result automatic ultrasonic flaw detector steel pipe rotation speed measuring device.

[0005] The utility model discloses to the need of sink formula steel pipe automatic ultrasonic flaw detector steel pipe rotation speed monitoring, provide a kind of rotation speed of steel pipe real-time measurement, the stability of observation inspection system, ensure the correctness of ultrasonic flaw detection result automatic ultrasonic flaw detector steel pipe rotation speed measuring device.

[0006] The application discloses a kind of automatic ultrasonic flaw detector steel pipe rotating speed measuring device, it is characterized by: including rotating plug, top plate, photoelectric sensor, rotating speed display, linear guide rail;The rotating plug is set in steel pipe head and rotates forward with steel pipe;The rotating plug is pressed on the top plate, and the outer surface is provided with reflective element in axial direction;The photoelectric sensor is arranged on the top plate and matched with the reflective element;The rotating speed display shows the rotating speed of steel pipe according to the detection signal of the photoelectric sensor;The top plate is arranged on the linear guide rail and moves along the linear guide rail.The rotating plug rotates with steel pipe, and the reflective element intermittently passes through the photoelectric sensor, and the photoelectric sensor shows the intermittent signal detected in real time through the rotating speed display, to realize the measurement of the rotating speed of steel pipe.The rotating plug is pressed on the top plate, so that the relative position of the photoelectric sensor and the reflective element can be kept stable, and the accuracy of detection data can be kept.Meanwhile, the end swinging condition when small-diameter steel pipe is detected can also be slowed down.

[0007] Further characterized in that: the head of the rotating plug is conical, and the top plate has a circular blind hole, and the conical head of the rotating plug is embedded in the circular blind hole.The conical head and the blind hole cooperate to ensure the stability of the rotation of the end of the steel pipe.

[0008] Preferably: the rotating plug adopts a combined structure, the main body is made of nylon material, the tail portion has a thread, the conical head is made of high-hardness wear-resistant material and is inserted into the main body, and the top plate is made of rigid wear-resistant material.The conical head and the main body are combined together by using different materials, so that the conical head can be replaced conveniently after being worn out.The thread structure of the tail portion of the main body ensures that the rotating plug is tightly and firmly connected with the inner wall of the steel pipe and rotates at the same speed with the steel pipe.

[0009] Preferably: the reflective element is installed on the rotating plug through a bayonet, so that the reflective element can be disassembled and installed conveniently.

[0010] Preferably: the top plate is arranged on the linear guide rail through a linear bearing, and when the steel pipe rotates forward, the top plate and the linear bearing move forward along the linear guide rail at the same speed, so that the photoelectric sensor keeps a stable distance from the rotating plug.

[0011] The utility model discloses a reflective element on the rotating plug cooperates with the photoelectric sensor on the top plate that rotates forward with the steel pipe synchronously, realizes the real-time monitoring of the rotating speed of the steel pipe of automatic ultrasonic flaw detector for steel pipe.Meanwhile, the end swinging condition when small-diameter steel pipe is detected can also be slowed down.The utility model discloses simple structure, and stable work. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structure schematic diagram of sink type steel pipe automatic ultrasonic flaw detector.

[0013] Figure 2 It is the top view of the utility model.

[0014] Figure 3 This is a side view of the present invention.

[0015] Figure 4 This is a partial enlarged view of the present invention.

[0016] Figure 5 This is a schematic diagram of the rotating plug structure. Detailed Implementation

[0017] like Figures 2-4 As shown, an automatic ultrasonic flaw detector for measuring the rotational speed of a steel pipe includes a rotating plug 1, a top plate 8, a photoelectric sensor 9, a speed display 11, and a linear guide rail 6. The rotating plug 1 is positioned at the head of the steel pipe 5 and rotates forward with it. The top plate 8 is mounted on the linear guide rail 6 via a linear bearing 7 and moves along the linear guide rail 6. The rotating plug 1 presses against the top plate 8, and its outer surface has an axially provided bayonet for mounting a dedicated reflective element 10. The photoelectric sensor 9 is mounted on the top plate 8 and is matched with the reflective element 10. The speed display 11 is mounted near the linear guide rail 6 and is connected to the photoelectric sensor 9 via a cable to display real-time automatic rotational speed measurement data of the steel pipe 5.

[0018] like Figure 4 , 5 As shown, the rotating plug 1 adopts a combined structure. The main body is made of nylon, and the tail has threads. The head of the rotating plug 1 is conical and made of hard alloy material, which is highly hard and wear-resistant. It is inserted into the main body. The top plate 8 is machined from mold steel and precision ground after surface quenching. The top plate 8 has a circular blind hole, into which the conical head 2 of the rotating plug 1 is inserted. The conical head 2 and the blind hole cooperate to ensure the stability of the rotation of the end of the steel pipe 5. The conical head 2 and the main body are combined with different materials to facilitate the replacement of the conical head 2 after wear. The threaded structure at the tail of the main body ensures that the rotating plug 1 is tightly and firmly connected to the inner wall of the steel pipe 5 and rotates at the same speed as the steel pipe 5.

[0019] In operation, the rotating plug 1 rotates with the steel pipe 5, and the reflective element 10 intermittently passes through the photoelectric sensor 9. The photoelectric sensor 9 displays the detected intermittent signals in real time through the speed display 11, thus measuring the rotational speed of the steel pipe. The rotating plug 1 presses against the top plate 8, ensuring the relative position of the photoelectric sensor 9 and the reflective element 10 remains stable, maintaining the accuracy of the detection data. Simultaneously, it also reduces the end-end swinging during flaw detection of small-diameter steel pipes.

Claims

1. An apparatus for measuring the rotational speed of a steel pipe in an automatic ultrasonic inspection machine, characterized by: It includes rotating plug, top plate, photoelectric sensor, rotating speed display and linear guide; the rotating plug is arranged on the head of steel pipe and rotates with the steel pipe; the rotating plug is pressed on the top plate and the outer surface is provided with reflecting element in axial direction; the photoelectric sensor is arranged on the top plate and matches with the reflecting element; the rotating speed display displays the rotating speed of steel pipe according to the detection signal of photoelectric sensor; the top plate is arranged on the linear guide and moves along the linear guide.

2. The apparatus for measuring the rotating speed of a steel pipe of an automatic ultrasonic inspection machine according to claim 1, wherein: The head of rotating plug is conical, the top plate is provided with circular blind hole, and the conical head of rotating plug is inserted into the circular blind hole.

3. The apparatus for measuring the rotating speed of a steel pipe of an automatic ultrasonic inspection machine according to claim 2, wherein: The rotating plug adopts combined structure, the main body is made of nylon material, the tail is provided with thread, the conical head is made of high-hardness wear-resistant material and is inserted into the main body; the top plate is made of rigid wear-resistant material.

4. The apparatus for measuring the rotating speed of a steel pipe of an automatic ultrasonic inspection machine according to any one of claims 1 to 3, wherein: The reflecting element is installed on the rotating plug through bayonet.

5. The apparatus for measuring the rotating speed of a steel pipe of an automatic ultrasonic inspection machine according to claim 4, wherein: The top plate is arranged on the linear guide through linear bearing.

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