CN115096917A - Fixed X-ray machine accurate probing arm adjusting device and method thereof - Google Patents

Abstract

The invention provides a fixed X-ray machine accurate probe arm adjusting device and a method thereof, wherein the fixed X-ray machine accurate probe arm adjusting device comprises a base, a sliding probe arm is arranged on the base, the probe arm extends into a steel pipe, the steel pipe is abutted against a rotating tire, one side of the base is provided with a measuring device, the measuring device comprises a height measuring device and a distance measuring device, the height measuring device is provided with a first laser emitter which vertically slides, the distance measuring device is provided with a sliding sleeve which transversely slides, and the sliding sleeve is provided with a second laser emitter which can rotate; the steel pipe has two contact points with the child that changes, and height measuring device is used for measuring steel pipe and changes child contact point apart from ground height, and range unit is used for measuring the distance between two contact points of steel pipe and the child that changes. The height measuring device and the distance measuring device are used, theoretical calculation and precision measurement are adopted, the horizontal height to which the feeler arm should be adjusted can be accurately calculated, and the phenomenon that the focal length is too large or too small is avoided. Meanwhile, the phenomenon of missing detection of linear defects caused by image distortion is avoided.

Description

A fixed X-ray machine precise adjustment probe arm device and method thereof

technical field

The invention relates to the field of ray nondestructive testing, in particular to a fixed X-ray machine precise adjustment and detection arm device and a method thereof.

Background technique

With the development of non-destructive testing technology and the continuous improvement of quality control requirements, at present, the steel pipe manufacturing industry basically adopts X-ray industrial TV inspection equipment to conduct 100% X-ray inspection of all welds of steel pipes. In the non-destructive testing of submerged arc welded spiral steel pipes, some steel pipe manufacturers use DR or CR ray detection technology, but the working principle basically adopts the image receiving equipment and the ray source to keep the vertical state arrangement, so that the steel pipe welding seam is controlled and synchronized by the pipe transport trolley Rotate through the X-ray source window for 100% inspection of the full weld. The mechanical control part is generally arranged in the fixed inspection gallery, the X-ray generator is suspended by the probe arm, and the steel pipe is placed on the pipe transport trolley. Realize the dynamic or static inspection of steel pipe welds through the current operation. The specifications of the steel pipes produced are different, and each steel pipe has subtle differences. When the next steel pipe is replaced after the steel pipe inspection is completed, the focal length between the ray generator and the workpiece to be inspected will be different, which requires lifting the X-ray generator. The probe arm can be adjusted to different heights according to its requirements, so as to obtain the required ray transillumination focal length.

The probe arm adjustment in the prior art determines the focal length by visual inspection of the human eye, and cannot accurately adjust the probe arm to the center of the steel pipe, and the observation angle is also limited by the site environment. The probe arm lift button is nearly 15 meters away from the ray tube. As a result, the results of the inspector's adjustment of the lifting and lowering of the probe arm are subject to subjective influence, which is easy to cause the situation that the ray tube is not in the center of the steel pipe, thus forming the eccentric method of transillumination inside the source, resulting in the reduction of the effective length of the weld image and the reduction of the detection sensitivity. The K value is changed from 1 to 1. When it increases to about 1.1, it is easy to cause missed detection of transverse cracks. For this reason, we propose a fixed X-ray machine precise adjustment detection arm device and its method to solve the above problems.

Chinese patent document CN101975787B describes a probe arm device of a spiral welded pipe X-ray detector, a probe arm lifting device installed above the probe arm translation device and a probe arm body installed on the probe arm lift device. The invention has two adjustable and optional functions for the X-ray detection of the internal quality of the welding seam of the large-scale spiral welded steel pipe and the straight welded steel pipe, and solves the problem of the existing spiral welded pipe X-ray detection machine detection. The arm device can only adapt to the technical problems of single up-illumination or side-illumination of the welding seam, and poor practicability, thereby improving the performance of X-ray in the field of large-scale steel pipe weld inspection, improving the inspection speed and reducing the inspection cost. However, this device cannot accurately adjust the probe arm to the center of the steel pipe, and the result of the inspector's adjustment of the probe arm lift is subject to subjective influence, which is likely to cause the ray tube not to be in the center of the steel pipe, resulting in the reduction of the effective length of the weld image and the decrease in detection sensitivity. From 1 to about 1.1, there is a situation that leads to missed detection of transverse cracks, and there are defects in use, which need to be improved.

SUMMARY OF THE INVENTION

The invention provides a fixed X-ray machine precise adjustment probe arm device and a method thereof, which solves the problem that the focal length cannot be accurately positioned when the steel pipe is adjusted, and the inspector can only estimate the approximate position of the probe arm by visual inspection of the human eye, and the focal length cannot be accurately determined. Because the ray tube is not in the center of the steel pipe, the effective length of the weld image is reduced, the detection sensitivity is reduced, and the K value is increased from 1 to about 1.1, which leads to the problem of missed detection of linear defects such as cracks at the heel of the weld.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a fixed X-ray machine precise adjustment probe arm device and method thereof, comprising a machine base, a sliding probe arm is arranged on the machine base, and the probe arm extends into a steel pipe Inside, the steel pipe abuts on the rotating tire, and a measuring device is installed on one side of the machine base. The measuring device includes an altimetry device and a distance measuring device. The height measuring device is provided with a vertically sliding first laser There is a sliding sleeve that slides horizontally, and a second laser transmitter that can be rotated is arranged on the sliding sleeve;

There are two contact points between the steel pipe and the tire, the height measuring device is used to measure the height of the contact point between the steel pipe and the tire and the ground, and the distance measuring device is used to measure the distance between the two contact points of the steel pipe and the tire.

In a preferred solution, the machine base is provided with a slide rail, the probe arm is mounted on the lifting slide block, the lift slide block is provided with a plurality of pulleys, and the pulleys abut on the pulleys.

In a preferred solution, a servo motor is installed on the top of the machine base, and one end of the servo motor is provided with a main lead screw, which is threadedly connected to the lead screw seat on the lifting slider.

In a preferred solution, a trolley is installed at the bottom of the steel pipe, a plurality of tumbling tires are arranged on the trolley, two tumbling tires are arranged on the tumbling tire, and the steel pipe abuts on the two tumbling tires.

In a preferred solution, one end of the probe arm is provided with an X-ray generator, one side of the probe arm is provided with a fixing frame, a fixing bracket is arranged on the top of the fixing frame, and a DR receiver is arranged on the fixing bracket, and the DR receiver is located in the front of the X-ray generator. above.

In a preferred solution, the height-measuring device is vertically installed on the ground, and the height-measuring device includes a base, on which is provided a guide post and a first lead screw, the first lead screw is provided with a sliding seat, and the sliding seat is provided with a first lead screw A laser transmitter, the slide seat is provided with a threaded hole, the threaded hole is threadedly connected with the first lead screw, the guide post is abutted on the slide hole of the slide base, the guide post is provided with a vertical scale, and the base is provided with first motor.

In a preferred solution, the distance measuring device is arranged horizontally on the ground, the distance measuring device includes two fixing blocks, a guide post and a second screw rod are arranged between the fixing blocks, and the second screw rod is threaded with the threaded through hole on the sliding sleeve. One of the fixed blocks is provided with a second motor, the output end of the second motor is connected with the second screw rod, and the guide post is provided with a transverse scale.

In a preferred solution, the sliding sleeve is provided with an annular chute, the sliding sleeve is provided with a rotating sleeve, one end of the rotating sleeve abuts on the annular sliding groove, the other end of the rotating sleeve is provided with an inner gear ring, and one end of the sliding sleeve is provided with an inner gear ring. The drive motor is provided with a gear on the output shaft of the drive motor, the gear meshes with the inner gear ring, and the rotating sleeve is provided with a second laser transmitter.

In a preferred solution, the height-measuring device generates transverse laser lines, and the distance-measuring device generates longitudinal laser lines.

A method for quickly aligning a probe arm of a fixed X-ray machine, the method is as follows: S1. Preparation before measurement: determine the specification of the steel pipe, measure the height of the probe arm from the ground, the radius R of the steel tube, and return the sliding seat on the altimetry device to zero , the sliding sleeve of the distance measuring device is reset to zero, and the trolley is driven so that the probe arm extends into the inside of the steel pipe, the raceway of the trolley is opened, and the steel pipe is dropped onto the swivel tire. There are two contact points A and B between the steel pipe and the swivel tire;

S2. Measure the height of the contact point between the tire wheel and the steel pipe, drive the first motor, so that the horizontal laser line emitted from the first laser transmitter covers point A or B, and read the value on the vertical scale as H _{for the tire height} ;

S3. Roughly adjust the orientation of the second laser transmitter: drive the second motor so that the second laser transmitter is roughly located at the lower side of point A, turn on the drive motor, so that the longitudinal laser line and the transverse laser line emitted by the second laser transmitter intersect;

S4. Measure the distance between the two contact points A and B of the steel pipe and the turning tire: drive the second motor so that the longitudinal laser line covers point A, record the value L1 on the horizontal scale, and drive the second motor again to make The longitudinal laser line covers point B, record the value L2 on the transverse scale, and the distance between the tire contact points A and B is L=L1-L2;

S5. Calculate the d _{depression depth} of the steel pipe: use the Pythagorean theorem to calculate h,

d _{recess depth} =Rh;

h is the height from the contact point A to the axis of the steel pipe, d is the height from the contact point A to the lowest point of the steel pipe,

S6. Calculate the height S between the axis line of the steel pipe and the ground, S=H _{turning tire height} + Rd _{depression depth} ;

S7. Input the height S into the computer, and drive the servo motor to make the servo motor rotate, so that the probe arm is lifted to the position at the ground height S, and the probe arm shape adjustment is completed.

The beneficial effects of the invention are as follows: the invention adopts theoretical calculation and precision measurement, and the height measuring device and the distance measuring device are used in combination, so that the horizontal height of the axis line of the steel pipe can be accurately measured, and the detection arm should be adjusted to accurately calculate. The level height is not limited to the difference between the size of the steel pipe and the wall thickness of the individual steel pipe. At the same time, it avoids the phenomenon of image distortion and missed detection of line defects due to the limitations of the process. The traditional adjustment method adopts the visual inspection method to adjust the probe arm, and only a range value is written for the focal length in the process. There is no reference object during the adjustment process. The adjustment state of the probe arm is subject to personal subjective influence, and there is only one person in the position. After completing the adjustment and lane change work, the entire X-ray trolley has many cables, and the ray tube is 15 meters away from the button of the probe arm system. , The new method improves the adjustment of the probe arm from the two aspects of work efficiency and process quality improvement, and is suitable for popularization and use.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments;

Fig. 1 is the front view of the overall structure of the present invention;

Fig. 2 is the right side view of the overall structure of the present invention;

Fig. 3 is the right side view of the partial structure of the present invention;

Fig. 4 is the front view of the partial structure of the present invention;

Fig. 5 is the front view of the height measuring device of the present invention;

Fig. 6 is the sectional view of the distance measuring device of the present invention;

Fig. 7 is the schematic diagram when the steel pipe of the present invention is measured;

In the figure: machine base 1; slide rail 101; lifting slider 2; pulley 201; probe arm 3; measuring device 4; height measuring device 5; base 501; guide post 502; Threaded hole 505; first laser transmitter 506; vertical scale 507; first motor 508; distance measuring device 6; fixed block 601; guide post 602; second screw 603; sliding sleeve 604; rotating sleeve 605; Gear ring 606; drive motor 607; gear 608; lateral scale 609; second motor 610; second laser transmitter 611; tire 7; tire wheel 701; steel pipe 8; trolley 9; bracket 10; fixed bracket 11; DR receiver 12; X-ray generator 13; ground 14; main screw 15; drive motor 16; transverse laser line 17; longitudinal laser line 18;

Detailed ways

Example 1:

As shown in Figures 1-7, a fixed X-ray machine precise adjustment probe arm device and method, including a machine base 1, the machine base 1 is provided with a sliding probe arm 3, the probe arm 3 extends into the interior of the steel pipe 8, and the steel pipe 8 abuts on the rotating tire 7, one side of the machine base 1 is provided with a measuring device 4, the measuring device 4 includes an altimetry device 5 and a distance measuring device 6, and the altimeter device 5 is provided with a vertically sliding first laser transmitter 506, the distance measuring device 6 is provided with a laterally sliding sliding sleeve 604, and the sliding sleeve 604 is provided with a second laser transmitter 611 that can be rotated;

There are two contact points between the steel pipe 8 and the tire 7, the height measuring device 5 is used to measure the height of the contact point between the steel pipe 8 and the tire 7 from the ground 14, and the distance measuring device 6 is used to measure the difference between the two contact points of the steel pipe 8 and the tire 7. distance between. With this structure, the drive motor 16 is turned on to rotate the main screw 15 to make the lift slider 2 slide on the machine base 1 to lift the probe arm 3 relative to the ground 14 to achieve the lift function of the probe arm 3 .

The altimetry device 5 is vertically fixed on the ground 14. When the altimeter device 5 is installed, it presents a certain inclination angle, so that the first laser transmitter 506 emits a transverse laser line 17 that is roughly irradiated between the tire wheel 701 and the steel pipe 8. Near the contact point, the horizontal direction of the laser line 17 is horizontal, and the first motor 508 is driven to make the sliding seat 504 slide vertically, so that the first laser transmitter 506 on the sliding seat 504 can accurately measure the vertical position of the contact points A and B. Straight height H _{turning tire height} .

The distance measuring device 6 is installed horizontally on the ground 14, the direction of the second screw 603 in the distance measuring device 6 is perpendicular to the direction of the central axis of the steel pipe 8, and the driving motor 607 is turned on to make the rotating sleeve 605 rotate on the sliding sleeve 604, so that the The second laser emitter 611 on the rotating sleeve 605 rotates. The second laser transmitter 611 emits the longitudinal laser line 18, and the longitudinal laser line 18 is a vertical line. Since the measuring device 4 is located at the bottom of the steel pipe 8 and is at a certain distance from the horizontal plane of the steel pipe 8, when the size of the steel pipe 8 is changed, the position of the longitudinal laser line 18 in the circumferential direction of the laser line changes greatly. Only when the driving motor 607 is turned on for adjustment can the The longitudinal laser line 18 is preliminarily adjusted to the steel pipe 8 or the tire wheel 701 . The second motor 610 is activated again, so that the sliding sleeve 604 slides on the second screw 603, so that the longitudinal laser line 18 covers the contact point A or the contact point B, so as to accurately measure the distance L between A and B.

再通过h和钢管8半径R，求得d_{凹陷深度，}最后计算钢管8轴心线距地面14高度S，S＝H_转胎高度+R-d_凹陷深度。通过测高装置5和测距装置6，能够精确测量钢管8的高度数值，从而达到准确快速确定焦距，调整好探臂的目的。Through the distance L between the radii R, A and B of the steel pipe 8, it can be obtained by the Pythagorean theorem

Then through h and the radius R of the steel pipe 8, the _{dent depth of d is obtained, and} finally the height S of the axis line of the steel pipe 8 from the ground 14 is calculated, S=H _{turning tire height} + Rd _{dent depth} . Through the height measuring device 5 and the distance measuring device 6, the height value of the steel pipe 8 can be accurately measured, so as to achieve the purpose of accurately and quickly determining the focal length and adjusting the probe arm.

The invention adopts theoretical calculation and precision measurement, and can accurately calculate the height of the probe arm 3 to the level, not limited to the difference between the size of the steel tube 8 and the wall thickness of the individual steel tube 8, which is relatively simple and convenient, and avoids the adjustment of the probe arm 3 by the traditional technology. Causes the focal length to be too large or too small. At the same time, it avoids the phenomenon of image distortion and missed detection of line defects due to the limitations of the process. The traditional adjustment method adopts the visual inspection method to adjust the probe arm 3, and only a range value is written for the focal length length in the process. There is no reference object during the adjustment process. The adjustment state of the probe arm 3 is subject to personal subjective influence. One person completes the job of changing the shape and changing the lane. The entire X-ray trolley has many cables, and the ray tube is 15 meters away from the button of the probe arm 3 system. It is not convenient to observe the state of the probe arm 3 near the steel pipe. The method of 3 has hidden dangers. The new method improves the adjustment of the probe arm from two aspects of work efficiency and process quality improvement, and is suitable for popularization and use.

In a preferred solution, the machine base 1 is provided with a slide rail 101 , the probe arm 3 is mounted on the lifting slider 2 , and the lifting slider 2 is provided with a plurality of pulleys 201 , and the pulleys 201 abut on the pulleys 201 . With this structure,

In a preferred solution, a servo motor 16 is installed on the top of the machine base 1 , and one end of the servo motor 16 is provided with a main screw 15 , which is threadedly connected to the screw seat on the lifting slider 2 . With this structure, the drive motor 16 is turned on to rotate the main screw 15 to make the lift slider 2 slide on the machine base 1 to lift the probe arm 3 relative to the ground 14 to achieve the lift function of the probe arm 3 . At the same time, the servo motor 16 drives the main screw 15, and cooperates with the computer, the servo motor 16 rotates a certain number of turns, and the main screw 15 rises and falls a certain distance, which can accurately adjust the height of the probe arm 3 and achieve the function of precise adjustment.

In a preferred solution, a trolley 9 is installed at the bottom of the steel pipe 8 , a plurality of turrets 7 are arranged on the trolley 9 , and two tumbling wheels 701 are arranged on the tumbling tire 7 , and the steel pipe 8 abuts on the two tumbling wheels 701 . With this structure, the plurality of turrets 7 play a supporting role for the trolley 9, and each turret wheel 701 on the turret 7 plays the role of supporting the steel pipe 8, and the steel pipe 8 and the two turret wheels 701 have contact points A, Contact point B.

In a preferred solution, one end of the probe arm 3 is provided with an X-ray generator 13, one side of the probe arm 3 is provided with a fixed frame 19, the top of the fixed frame 19 is provided with a fixed bracket 11, and the fixed bracket 11 is provided with a DR receiver 12, DR The receiver 12 is located directly above the X-ray generator 13 . With this structure, real-time ray imaging is an inspection method that can observe the generated image while the ray is transilluminated. The most important process of this method is to use the fluorescent screen to convert the ray and light. After the ray source passes through the steel pipe 8, it is imaged on the fluorescent screen detector. After being photographed by a TV camera, the image is displayed either directly or processed by a computer and displayed on the TV monitor screen to evaluate the internal quality of the workpiece. Due to the different exposure fields of steel pipes of different specifications, the DR receiver 12 must correct and repair the dead pixels and the background. If the focal length of the DR receiver 12 changes too much, the DR receiver 12 cannot accurately reflect the slight difference in the focal length. The change results in the difference of the image, which is easy to cause the missed detection of linear defects such as cracks in the heel of the weld. By precisely adjusting the height of the probe arm 3, the present invention avoids the phenomenon of missed detection of linear defects such as cracks in the heel of the welding seam.

In a preferred solution, the height-measuring device 5 is vertically installed on the ground 14 , and the height-measuring device 5 includes a base 501 . The seat 504 is provided with a first laser transmitter 506 on the sliding seat 504, and a threaded hole 505 is provided on the sliding seat 504. The threaded hole 505 is threadedly connected with the first screw rod 503, and the guide post 502 abuts against the sliding hole of the sliding seat 504. A vertical scale 507 is arranged on the guide post 502 , and a first motor 508 is arranged on the base 501 . With this structure, the height-measuring device 5 is vertically fixed on the ground 14, and when the height-measuring device 5 is installed, it presents a certain inclination angle, so that the transverse laser line 17 emitted by the first laser transmitter 506 is approximately irradiated on the tire wheel 701 Near the contact point with the steel pipe 8, the horizontal direction of the horizontal laser line 17 is horizontal, and the first motor 508 is driven to make the sliding seat 504 slide vertically, so that the first laser transmitter 506 on the sliding seat 504 can accurately measure the contact point A And the vertical height of B and the _tire height.

In a preferred solution, the distance measuring device 6 is arranged horizontally on the ground 14 , and the distance measuring device 6 includes two fixing blocks 601 , and a guide post 602 and a second screw rod 603 are arranged between the fixing blocks 601 , and the second screw rod 603 is connected to The threaded through holes on the sliding sleeve 604 are threadedly connected, one of the fixing blocks 601 is provided with a second motor 610, the output end of the second motor 610 is connected with the second screw 603, and the guide post 602 is provided with a horizontal scale 609 . With this structure, the distance measuring device 6 is installed horizontally on the ground 14 , the direction of the second screw 603 in the distance measuring device 6 is perpendicular to the direction of the central axis of the steel pipe 8 , and the driving motor 607 is turned on, so that the rotating sleeve 605 is in the sliding sleeve 604 Rotate to rotate the second laser emitter 611 on the rotating sleeve 605 . The second laser transmitter 611 emits the longitudinal laser line 18, and the longitudinal laser line 18 is a vertical line. Since the measuring device 4 is located at the bottom of the steel pipe 8 and is at a certain distance from the horizontal plane of the steel pipe 8, when the size of the steel pipe 8 is changed, the position of the longitudinal laser line 18 in the circumferential direction of the laser line changes greatly. Only when the driving motor 607 is turned on for adjustment can the The longitudinal laser line 18 is preliminarily adjusted to the steel pipe 8 or the tire wheel 701 .

In a preferred solution, the sliding sleeve 604 is provided with an annular chute, the sliding sleeve 604 is provided with a rotating sleeve 605, one end of the rotating sleeve 605 abuts on the annular chute, and the other end of the rotating sleeve 605 is provided with an inner gear ring 606 One end of the sliding sleeve 604 is provided with a driving motor 607, the output shaft of the driving motor 607 is provided with a gear 608, the gear 608 is meshed with the inner gear ring 606, and the rotating sleeve 605 is provided with a second laser transmitter 611. With this structure, the second motor 610 is restarted to make the sliding sleeve 604 slide on the second screw rod 603, so that the longitudinal laser line 18 covers the contact point A or the contact point B, so as to accurately measure the distance between A and B L.

In a preferred solution, the height-measuring device 5 generates transverse laser lines 17 , and the distance-measuring device 6 generates longitudinal laser lines 18 . With this structure, the direction of the transverse laser lines 17 is the horizontal direction, and the direction of the longitudinal laser lines 18 is the vertical direction. The horizontal laser line 17 and the vertical laser line 18 are used in combination to accurately confirm the position of the contact point A and the contact point B, so that by reading the vertical scale 507 and the horizontal scale 609, through theoretical calculation, calculate the steel pipe 8 The height S of the axis line from the ground 14, S=H _{turning tire height} +Rd _{dent depth} . Through the height measuring device 5 and the distance measuring device 6, the height value of the steel pipe 8 can be accurately measured, so as to achieve the purpose of accurately and quickly determining the focal length and adjusting the probe arm.

Example 2:

With reference to Embodiment 1, it is further described, as shown in Figures 1 to 7, a method for quickly aligning the probe arm of a fixed X-ray machine. The height, the radius R of the steel pipe 8, the sliding seat 504 on the height measuring device 5 is reset to zero, the sliding sleeve 604 of the distance measuring device 6 is reset to zero, and the trolley 9 is driven, so that the probe arm 3 extends into the steel pipe 8, and the rolling of the trolley 9 is turned on. Road, drop the steel pipe 8 on the tire 7, there are two contact points A and B between the steel pipe 8 and the tire 7; measure the height of the contact point between the tire wheel 701 and the steel pipe 8, and drive the first motor 508 to make the first The horizontal laser line 17 emitted from the laser transmitter 506 covers point A or B, and the value on the vertical scale 507 is read as the _{height of the H turning tire} ;

Roughly adjust the orientation of the second laser transmitter 611 : drive the second motor 610 so that the second laser transmitter 611 is roughly located at the lower side of point A, and turn on the drive motor 607 to make the longitudinal laser line 18 emitted by the second laser transmitter 611 Intersect with the transverse laser line 17; S4, measure the distance between the two contact points A, B of the steel pipe 8 and the turning tire 7: drive the second motor 610, so that the longitudinal laser line 18 covers point A, and record on the transverse scale 609 The numerical value L1, drive the second motor 610 again, so that the longitudinal laser line 18 covers point B, record the numerical value L2 on the lateral scale 609, and the distance L=L1-L2 between the contact points A and B of the turning tire 7;

S5. Calculate the d _{depression depth} of the steel pipe 8: use the Pythagorean theorem to calculate h,

d _{recess depth} =Rh;

h is the height from the contact point A to the axis of the steel pipe 8, and d is the height from the contact point A to the lowest point of the steel pipe 8.

Calculate the height S of the axis line of the steel pipe 8 from the ground 14, S=H _{turning tire height} +Rd _{sag depth} ; input the height S into the computer, drive the servo motor 16, so that the servo motor 16 rotates, so that the probe arm 3 is lifted to the At the position of height S at 14 on the ground, the adjustment of the probe arm is completed.

Example 3

Further description in conjunction with Embodiments 1 to 2, as shown in Figures 1 to 7, take a Φ820x10 steel pipe as an example, R is 410 mm, drive the trolley 9, so that the probe arm 3 extends into the steel pipe 8, open the raceway of the trolley 9, and put the steel pipe 8 falls on the tire 7, there are two contact points A and B between the steel pipe 8 and the tire 7; measure the height of the contact point between the tire wheel 701 and the steel pipe 8, and drive the first motor 508 to make the first laser transmitter 506 The horizontal laser line 17 emitted above covers point A or B, and the value on the vertical scale 507 is read as the _height of the H-turning tire, and the H _{-turning tire height} is 500 mm.

Roughly adjust the orientation of the second laser transmitter 611 : drive the second motor 610 so that the second laser transmitter 611 is roughly located at the lower side of point A, and turn on the drive motor 607 to make the longitudinal laser line 18 emitted by the second laser transmitter 611 Intersect with the transverse laser line 17; measure the distance between the two contact points A, B of the steel pipe 8 and the tire 7: drive the second motor 610 so that the longitudinal laser line 18 covers point A, and record the value on the transverse scale 609 L1, drive the second motor 610 again, so that the longitudinal laser line 18 covers point B, record the value L2 on the lateral scale 609, the distance between the contact points A and B of the tire 7 is L=L1-L2, and calculate L is 400mm.

求得h为358mmCalculate the d _{depression depth} of the steel pipe 8: use the Pythagorean theorem to calculate h,

Find h to be 358mm

d _{recessed depth} =Rh, the obtained d _{recessed depth} is 52 mm.

h is the height from the contact point A to the axis of the steel pipe 8, and d is the height from the contact point A to the lowest point of the steel pipe 8.

Calculate the height S between the axis line of the steel pipe 8 and the ground 14, S=H _{turning tire height} + Rd _{sag depth} , S is 838mm, input the height 838mm into the computer, drive the servo motor 16, so that the servo motor 16 rotates to make The probe arm 3 is lifted to a position at the height S of the ground 14, and the probe arm shape adjustment is completed.

k≦1.06(B级)A1: Calculate A1 Circumferential Welded Joints

k≦1.06 (Class B)

In the central transillumination method, K=1 transverse crack detection angle θ≈0°

A2: When the adjustable probe arm is not in the center

Θ is the maximum distortion angle.

That is, the position where the probe arm is 838mm from the horizontal height is the height of the probe arm where the 820 gauge steel pipe reaches the focal length of the central transillumination method. At this time, k=1. In the past, it was only enough for the A-level k value to reach 1.1 in the process. Now the k value has increased 10/100, which improves the detection sensitivity, calculates the S value of steel pipes of different specifications at one time, makes a mark, and then adjusts the probe arm of any size, just press the probe arm lift power supply to align with the mark.

The above-mentioned embodiments are only the preferred technical solutions of the present invention, and should not be regarded as limitations of the present invention. The protection scope of the present invention should be based on the technical solutions recorded in the claims, including the equivalents of the technical features in the technical solutions recorded in the claims. The alternative is protection scope. That is, equivalent replacements and improvements within this scope are also within the protection scope of the present invention.

Claims (10)

1. The utility model provides a fixed accurate probe arm device of transferring of X-ray machine, characterized by: the device comprises a machine base (1), wherein a sliding probe arm (3) is arranged on the machine base (1), the probe arm (3) extends into a steel pipe (8), the steel pipe (8) is abutted against a rotating tire (7), a measuring device (4) is arranged on one side of the machine base (1), the measuring device (4) comprises a height measuring device (5) and a distance measuring device (6), a first laser transmitter (506) which vertically slides is arranged on the height measuring device (5), a sliding sleeve (604) which transversely slides is arranged on the distance measuring device (6), and a second laser transmitter (611) which can rotate is arranged on the sliding sleeve (604);

the steel pipe (8) and the rotating tire (7) are provided with two contact points, the height measuring device (5) is used for measuring the height between the contact point of the steel pipe (8) and the rotating tire (7) and the ground (14), and the distance measuring device (6) is used for measuring the distance between the two contact points of the steel pipe (8) and the rotating tire (7).

2. The fixed precise X-ray machine probing arm device of claim 1, wherein: the machine base (1) is provided with a sliding rail (101), the probe arm (3) is installed on the lifting slide block (2), the lifting slide block (2) is provided with a plurality of pulleys (201), and the pulleys (201) abut against the pulleys (201).

3. The fixed precise X-ray machine probing arm device of claim 1, wherein: a servo motor (16) is installed at the top of the machine base (1), a main screw rod (15) is arranged at one end of the servo motor (16), and the main screw rod (15) is in threaded connection with a screw rod seat on the lifting sliding block (2).

4. The fixed precise X-ray machine probing arm device as claimed in claim 1, wherein: the trolley (9) is installed at the bottom of the steel pipe (8), the plurality of rotary tires (7) are arranged on the trolley (9), two rotary tire wheels (701) are arranged on the rotary tires (7), and the steel pipe (8) abuts against the two rotary tire wheels (701).

5. The fixed precise X-ray machine probing arm device of claim 1, wherein: an X-ray generator (13) is arranged at one end of the probe arm (3), a fixing frame (19) is arranged on one side of the probe arm (3), a fixing support (11) is arranged at the top of the fixing frame (19), a DR receiver (12) is arranged on the fixing support (11), and the DR receiver (12) is located right above the X-ray generator (13).

6. The fixed precise X-ray machine probing arm device of claim 1, wherein: height measuring device (5) are installed perpendicularly on ground (14), height measuring device (5) include base (501), be equipped with guide pillar (502) and first lead screw (503) on base (501), be equipped with slide (504) on first lead screw (503), be equipped with first laser emitter (506) on slide (504), be equipped with screw hole (505) on slide (504), screw hole (505) and first lead screw (503) threaded connection, guide pillar (502) support and lean on the slide opening of slide (504), be equipped with vertical scale (507) on guide pillar (502), be equipped with first motor (508) on base (501).

7. The fixed precise X-ray machine probing arm device of claim 1, wherein: the distance measuring device (6) is horizontally arranged on the ground (14), the distance measuring device (6) comprises two fixing blocks (601), a guide pillar (602) and a second screw rod (603) are arranged between the fixing blocks (601), the second screw rod (603) is in threaded connection with a threaded through hole in a sliding sleeve (604), a second motor (610) is arranged on one fixing block (601), the output end of the second motor (610) is connected with the second screw rod (603), and a transverse scale (609) is arranged on the guide pillar (602).

8. The fixed precise X-ray machine probing arm device of claim 1, wherein: the laser transmitter is characterized in that an annular sliding groove is formed in the sliding sleeve (604), a rotating sleeve (605) is arranged on the sliding sleeve (604), one end of the rotating sleeve (605) abuts against the annular sliding groove, an inner toothed ring (606) is arranged at the other end of the rotating sleeve (605), a driving motor (607) is arranged at one end of the sliding sleeve (604), a gear (608) is arranged on an output shaft of the driving motor (607), the gear (608) is meshed with the inner toothed ring (606), and a second laser transmitter (611) is arranged on the rotating sleeve (605).

9. The fixed precise X-ray machine probing arm device of claim 1, wherein: the height measuring device (5) generates a transverse laser line (17), and the distance measuring device (6) generates a longitudinal laser line (18).

10. The method for fast adjusting the probe arm of the fixed X-ray machine according to any one of claims 1 to 9, comprising: s1, preparation before measurement: determining the specification of a steel pipe (8), measuring the height of a probe arm (3) from the ground (14), the radius R of the steel pipe (8), zero resetting of a sliding seat (504) on a height measuring device (5), zero resetting of a sliding sleeve (604) of a distance measuring device (6), driving of a trolley (9) to enable the probe arm (3) to extend into the steel pipe (8), opening of a roller path of the trolley (9), dropping of the steel pipe (8) onto a rotating tire (7), and A, B contact points between the steel pipe (8) and the rotating tire (7);

s2, measuring the height of a contact point of the tyre rotating wheel (701) and the steel pipe (8), driving a first motor (508) to enable a transverse laser line (17) emitted from a first laser emitter (506) to cover a point A or a point B, and reading the numerical value on a vertical graduated scale (507) to be H _{Height of rotating tire} ；

S3, adjusting substantially the second laser emitter (611) orientation: driving the second motor (610) to position the second laser emitter (611) substantially below point a, and activating the drive motor (607) to cause the longitudinal laser line (18) emitted by the second laser emitter (611) to intersect the transverse laser line (17);

s4, measuring the distance between two contact points A, B of the steel pipe (8) and the rotating tire (7): driving a second motor (610) to enable the longitudinal laser line (18) to cover the point A, recording a value L1 on the transverse scale (609), driving the second motor (610) again to enable the longitudinal laser line (18) to cover the point B, recording a value L2 on the transverse scale (609), and recording a distance L between contact points A, B of the rotary tire (7) to be L1-L2;

s5, calculating d of the steel pipe (8) _{Depth of depression} : h is calculated by utilizing the pythagorean theorem,

d _{depth of depression} ＝R-h；

h is the height from the contact point A to the axis of the steel pipe (8), d is the height from the contact point A to the lowest point of the steel pipe (8),

s6, calculating the height S of the axis of the steel pipe (8) from the ground (14), wherein S is H _{Height of rotating tire} +R-d _{Depth of depression} ；

And S7, inputting the height S into the computer, driving the servo motor (16) to rotate the servo motor (16) so as to lift the probe arm (3) to the position at the height S of the ground (14), and completing the probe arm shape adjustment.

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