CN106546666B

CN106546666B - K-shaped scanning device suitable for steel rail flaw detection

Info

Publication number: CN106546666B
Application number: CN201710024347.3A
Authority: CN
Inventors: 郑伟和; 王善辉; 郑树君; 林斌伟; 周少武; 陈美君; 王丽萍; 张纯青
Original assignee: Guangdong Goworld Co ltd
Current assignee: Guangdong Goworld Co ltd
Priority date: 2017-01-13
Filing date: 2017-01-13
Publication date: 2023-03-14
Anticipated expiration: 2037-01-13
Also published as: CN106546666A

Abstract

The embodiment of the invention discloses a K-shaped scanner suitable for steel rail flaw detection, which comprises a driving device, a lockable bending joint and a probe clamping coupling device, wherein the driving device comprises a pair of bases, a pair of slide rails, a main synchronous pulley, a secondary synchronous pulley, a synchronous belt and a pair of sliding tables; the lockable bending joint comprises a joint base, a limiting block and a limiting groove; the probe clamping and coupling device is fixedly arranged below the lockable bending joint. By adopting the invention, the head and the rail bottom of the steel rail can be scanned for weld defects, the probe can be ensured to be in sliding guide adaptation with the steel rail in the scanning process, the coupling consistency of the probe and the steel rail is ensured, the position of the defect is directly read through the scale, and meanwhile, the instrument can also show the position of the defect through the position feedback device, thereby ensuring the measurement simplicity and accuracy.

Description

K-shaped scanning device suitable for steel rail flaw detection

Technical Field

The invention relates to the field of ultrasonic flaw detection, in particular to an ultrasonic flaw detection scanning device which is used for finding weld defects of rail heads and rail bottoms of steel rails. And searching and positioning weld damage.

Background

The ultrasonic detection of the steel rail welding seam is based on the ultrasonic end angle reflection principle and adopts an ultrasonic reflection flaw detection method. When K-type scanning is carried out, one transmitting probe and one receiving probe are required to be ensured to move relatively strictly at a constant speed, so that the sound beam can be reflected to an accurate position to be received by the receiving probe when encountering defects so as to avoid leakage and damage. In the prior art, the defects that the motion track cannot be ensured to be accurate and the probe coupling consistency cannot be ensured when the K-type scanning of the rail head and the rail bottom weld is manually carried out are overcome.

Disclosure of Invention

The technical problem to be solved by the embodiment of the invention is to provide a K-shaped scanner suitable for rail flaw detection. The stable running track and the coupling consistency of the probe can be ensured.

In order to solve the technical problem, the embodiment of the invention provides a K-shaped scanner suitable for rail flaw detection, which comprises a driving device, a lockable bending joint and a probe clamping coupling device, wherein the driving device is connected with the lockable bending joint;

the driving device comprises a pair of bases, a pair of sliding rails arranged between the pair of bases in parallel, a master synchronous belt wheel and a slave synchronous belt wheel which are respectively arranged on the pair of bases, a synchronous belt linked with the master synchronous belt wheel and the slave synchronous belt wheel, and a pair of sliding tables which are respectively fixedly arranged on two sides of the synchronous belt and are respectively arranged on the pair of sliding rails in a sliding manner;

the lockable bending joint comprises a joint base fixedly arranged on the sliding table and a limiting block rotatably arranged in the joint base, wherein a limiting groove is formed in the limiting block, a sliding groove is formed in the inner end of the joint base, a limiting push rod slides in the sliding groove, a compression spring is arranged between the limiting push rod and the joint base, and the limiting push rod is provided with a convex block clamped with the limiting groove;

the probe clamping and coupling device is fixedly arranged below the lockable bending joint.

Further, a magnet is arranged below the base.

Furthermore, a scanning starting point and scales for indicating the position of the injury are arranged on the pair of slide rails.

Furthermore, probe centre gripping coupling device including rotate set up in can lock the bending joint below the probe guide holder, set up in the spring of probe guide holder bottom, set up in the centre gripping nail of probe guide holder oral area, the centre gripping nail with the spring cooperation is fixed and is blocked the probe.

Furthermore, the probe guide seat is arranged below the lockable bending joint through a clamping seat.

Furthermore, the clamping seat is provided with a limiting nail above the probe guide seat.

Furthermore, a suspension arm is connected between the clamping seat and the lockable bending joint.

Still further, still include position feedback device, it includes the fixed encoder base that sets up on the base of main or follow synchronous pulley one side, rotate set up in encoder mounting panel on the encoder base, fixed set up in the encoder on the encoder mounting panel, the measuring wheel of encoder with main or follow synchronous pulley cooperation.

Furthermore, the encoder mounting plate is mounted on the encoder base through a rotating shaft and a torsion spring.

The embodiment of the invention has the following beneficial effects: the invention can scan the weld defects of the head and the rail bottom of the steel rail, ensures that the probe is in sliding guide adaptation with the steel rail in the scanning process, ensures the coupling consistency of the probe and the steel rail, directly reads the position of the defect through the scale, and simultaneously can show the position of the defect through the position feedback device, thereby ensuring the measurement simplicity and accuracy.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic top view of a pair of slide rails;

FIG. 3 is a schematic cross-sectional view of a lockable flexion joint;

FIG. 4 is a schematic structural view of a probe gripping coupling device;

FIG. 5 isbase:Sub>A schematic cross-sectional view of A-A in FIG. 4;

FIG. 6 is a schematic view of the structure of the position feedback device;

FIG. 7 is a schematic cross-sectional view of B-B of FIG. 6;

fig. 8 is a schematic structural view of the scanning on the steel rail of the invention.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

The K-shaped scanner suitable for steel rail flaw detection comprises a driving device 1, a lockable bending joint 2, a probe clamping coupling device 3 and a position feedback device 4.

As shown in the schematic structure of fig. 1.

The driving device 1 includes a pair of

bases

11a, 11b, a pair of

slide rails

12 a, 12b disposed in parallel between the

bases

11a, 11b, a primary synchronous pulley 13a disposed on the base 11a, a secondary synchronous pulley 13b disposed on the base 11b, a synchronous belt 14 linked to the primary synchronous pulley 13a and the synchronous pulley 13b, and a pair of slide tables 15a, 15b fixedly disposed on both sides of the synchronous belt 14 and slidably disposed on the

slide rails

12 a, 12b, respectively.

The slide tables 15a and 15b are fixedly provided on the timing belt 14 by

clamp blocks

16a and 16b, respectively.

Magnets 17 are provided below the

bases

11a, 11b to allow the drive unit 1 to attract the object rails. When in work, the device provides adsorption force for the whole device to ensure that the device is stably fixed on the steel rail, and the magnet mounting surface of the base is processed into different inclined surfaces according to different specifications of the steel rail to adapt to different steel rails

A scanning starting point is arranged on the sliding rail 12 a, and a scale for indicating the position of the injury is arranged on the sliding rail 12b, as shown in fig. 2.

In the present embodiment, the primary timing pulley 13 is matched with a hand wheel, however, the present invention may also select a motor to drive the primary timing pulley 13, and the present embodiment is not limited herein.

When the main synchronous belt wheel 13 rotates, the synchronous belt 14 drives the sliding tables 15a and 15b to synchronously and parallelly move relatively, and the sliding rails play a guiding role to ensure that the sliding tables move parallelly.

As shown in fig. 1 and fig. 3, the lockable bending joint 2 includes a joint base 21 fixedly arranged on the sliding table, a limiting block 22 rotatably arranged in the joint base 21, a limiting groove 23 formed on the limiting block 22, a sliding groove 24 arranged at the inner end of the joint base 21, a limiting push rod 25 sliding in the sliding groove 24, a compression spring 26 arranged between the limiting push rod 25 and the joint base 21, and a projection 27 engaged with the limiting groove 23 and arranged on the limiting push rod 25.

When the limiting block 22 rotates to a proper position during operation, the bump 27 extends into the limiting groove 23 and is clamped under the action of the compression spring 26 of the limiting push rod 25, and a constant working position can be provided for the probe at this time. When the probe is loosened, the limiting push rod is pushed by hand to release the limiting block, so that the probe is rotated to the original position.

As shown in fig. 4 and 5, the probe clamping and coupling device 3 includes a clamping seat 31 rotatably disposed below the lockable bending joint 2, a probe guide seat 32, two springs 33 disposed at the bottom of the probe guide seat 32, and the springs 33 mounted on spring guide posts 34 at the bottom of the probe guide seat 32.

The probe guide seat 32 is rotatably arranged on the clamping seat 31, the clamping nail 35 is arranged at the mouth of the probe guide seat 32, the two springs 33 are matched with the clamping nail 35, so that the probe 5 is arranged in the probe guide seat 32, stable coupling force is provided for the probe 5, and different coupling forces can be provided by adjusting the spring guide columns according to different occasions in actual work. The gripping pins 35 prevent the probe from being lost due to forces as it leaves the workpiece.

In order to allow the probe guide shoe 32 to rotate within a certain range to conform to the rail's circular arc surface,

the clamping seat 31 is provided with a limit pin 36 above the probe guide seat 32.

In this embodiment, the sliding tables 15a and 15b are respectively provided with two lockable bending joints 2, and the two lockable bending joints 2 are both provided with probe clamping coupling devices 3, wherein one probe clamping coupling device 3 is connected with the lockable bending joint 2 through a suspension arm 37, so that the lockable bending joint 2 can scan the rail head and the rail bottom of the rail.

As shown in fig. 6 and 7, the position feedback device 4 includes an encoder base 41 fixedly provided on the base 11b, an encoder mounting plate 42 rotatably provided on the encoder base 41, and an encoder 43 fixedly provided on the encoder mounting plate 42, and a measuring wheel 44 of the encoder 43 is engaged with the secondary timing pulley 13 b.

The encoder mounting plate 42 is mounted on the encoder base 41 via a rotating shaft 45 and cooperating with a torsion spring 46 so that the measuring wheel 44 can be resiliently abutted against the secondary timing pulley 13 b. The torsion spring 46 provides a coupling force to keep the two from slipping, improving the accuracy of the measurement.

Refer to the schematic structure shown in fig. 8.

The whole machine of the invention has the following working process: and (3) placing the machine at a starting point, and respectively locking the rail head and the rail bottom bending joint to ensure that the probe clamping and coupling device is firmly attached to the surface of the steel rail. And the main synchronous belt wheel is rotated leftwards and rightwards, so that the sliding table is moved to cover the scales on the sliding rail, and when a defective reflected wave is displayed on an instrument, the position of the defect can be directly read through the scales on the other sliding rail. Meanwhile, the instrument displays the defect position on the schematic diagram through the position information of the position feedback device.

While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A K-shaped scanner suitable for steel rail flaw detection is characterized by comprising a driving device, a lockable bending joint, a probe clamping coupling device and a position feedback device;

the probe clamping and coupling device is fixedly arranged below the lockable bending joint;

the pair of slide rails are provided with a scanning starting point and scales for indicating the position of the injury; the probe clamping and coupling device comprises a probe guide seat, a spring and a clamping nail, wherein the probe guide seat is rotatably arranged below the lockable bending joint, the spring is arranged at the bottom of the probe guide seat, the clamping nail is arranged at the opening part of the probe guide seat, and the clamping nail is matched with the spring to fixedly clamp the probe; the probe guide seat is arranged below the lockable bending joint through a clamping seat; a limiting nail is arranged above the probe guide seat on the clamping seat; a suspension arm is connected between the clamping seat and the lockable bending joint; the spring is arranged on a spring guide post at the bottom of the probe guide seat;

the position feedback device comprises an encoder base fixedly arranged on the base on one side of the main synchronous pulley or the auxiliary synchronous pulley, an encoder mounting plate rotatably arranged on the encoder base, and an encoder fixedly arranged on the encoder mounting plate, wherein a measuring wheel of the encoder is matched with the main synchronous pulley or the auxiliary synchronous pulley.

2. The K-type scanner suitable for steel rail flaw detection according to claim 1, wherein a magnet is arranged below the base.

3. The K-type scanner suitable for steel rail flaw detection according to claim 2, wherein the encoder mounting plate is mounted on the encoder base through a rotating shaft and matched with a torsion spring.