阅读说明：本技术 一种圆钢手动接触法超声检测稳定扫查装置及使用方法 (Round steel manual contact ultrasonic detection stable scanning device and using method thereof ) 是由 胡柏上 汪建军 周文军 张�浩 潘泽林 王峰 姜正锋 于 2021-08-26 设计创作，主要内容包括：本发明涉及一种圆钢手动接触法超声检测稳定扫查装置及使用方法,包括马鞍座、圆筒、空心螺栓、弹性盒和弹性体。圆筒下口与马鞍座顶固定连接,圆筒上底中心有螺孔和空心螺栓活动连接,马鞍座中心有通孔与圆筒连通,通孔内有凸圈,圆筒内弹性盒和弹性体叠放压缩于空心螺栓和凸圈之间。弹性盒包括上套筒、下套筒和第一弹簧,上套筒中心有第一通孔与螺栓通孔连通,下套筒有第二通孔用于嵌入探头线接口。弹性体包括探头箍圈、垫圈和第二弹簧,弹性体环绕探头,探头箍圈箍紧探头,垫圈抵住凸圈。本发明实现探头弹性位置和压力可调,且在扫查过程中探头对圆钢压力稳定,避免了手持探头摇摆和压力波动对扫查信号的影响,提升了检测准确性和作业效率。(The invention relates to a round steel manual contact ultrasonic detection stable scanning device and a using method thereof. The lower opening of the cylinder is fixedly connected with the top of the saddle seat, the center of the upper bottom of the cylinder is provided with a screw hole and a hollow bolt which are movably connected, the center of the saddle seat is provided with a through hole which is communicated with the cylinder, a convex ring is arranged in the through hole, and an elastic box and an elastic body in the cylinder are stacked and compressed between the hollow bolt and the convex ring. The elastic box comprises an upper sleeve, a lower sleeve and a first spring, wherein a first through hole is formed in the center of the upper sleeve and communicated with a bolt through hole, and a second through hole is formed in the lower sleeve and used for being embedded into a probe line interface. The elastic body comprises a probe hoop, a gasket and a second spring, the elastic body surrounds the probe, the probe hoop tightly hoops the probe, and the gasket abuts against the convex ring. The invention realizes the adjustable elastic position and pressure of the probe, and the probe has stable pressure on the round steel in the scanning process, thereby avoiding the influence of the swinging and pressure fluctuation of the handheld probe on scanning signals and improving the detection accuracy and the operation efficiency.)

1. The ultrasonic detection stable scanning device adopting the round steel manual contact method is characterized by comprising a saddle seat (1), a hollow bolt (3), a cylinder (2), an elastic box (4) and an elastic body (5), wherein the elastic box and the elastic body are arranged in the cylinder (2), the saddle seat (1) is provided with a probe through hole penetrating through the saddle seat (1), the probe through hole is communicated with the inside of the cylinder (2), the lower opening of the cylinder (2) is fixedly connected with the top end of the saddle seat (1), the upper bottom of the cylinder (2) is provided with a central screw hole, and the bottom end of the hollow bolt (3) is screwed into the inside of the cylinder (2) through the central screw hole;

the elastic box (4) comprises an upper sleeve (41), a first spring (43) and a lower sleeve (42), the lower sleeve (42) is embedded into the upper sleeve (41) and is in clearance fit with the upper sleeve (41), the first spring (43) is arranged between the upper sleeve (41) and the lower sleeve (42) and is in a compression state, a first through hole is formed in the top end of the upper sleeve (41), a second through hole is formed in the bottom end of the lower sleeve (42), the ultrasonic probe (6) is located below the lower sleeve (42), a probe line interface (61) in the top end of the ultrasonic probe (6) is embedded into the second through hole, and the probe line (62) sequentially penetrates through the hollow bolt (3) and the upper sleeve (41) to be connected with the probe line interface (61) in the elastic box (4);

elastomer (5) include probe band (51), second spring (52) and packing ring (53), the cylinder and ultrasonic probe (6) fixed connection at ultrasonic probe (6) are established to probe band (51) cover, second spring (52) encircle outside ultrasonic probe (6), packing ring (53) external diameter and the clearance fit of probe through-hole internal diameter, second spring (52) set up in probe band (51) and packing ring (53) between and are in compression state.

2. The round steel manual contact ultrasonic detection stable scanning device is characterized in that the gasket (53) is provided with a gasket flange (54), and the inner diameter of the gasket flange (54) is in clearance fit with the diameter of the ultrasonic probe (6).

3. The round steel manual contact ultrasonic detection stable scanning device according to claim 2, wherein the saddle seat (1) comprises a barrel butt joint part (11) connected with the cylinder (2) and a round steel contact part (12) contacted with the round steel (7), a third through hole is formed in the center of the barrel butt joint part (11), a fourth through hole is formed in the center of the round steel contact part (12), the third through hole and the fourth through hole form a probe through hole for the ultrasonic probe (6) to pass through, and the gasket (53) is arranged at the fourth through hole.

4. The round steel manual contact ultrasonic detection stable scanning device according to claim 3, wherein an inner thread is arranged on the inner wall of the lower opening of the cylinder (2), an outer thread is arranged on the outer wall of the butt joint part (11) of the cylinder, and the cylinder (2) is in threaded connection with the butt joint part (11) of the cylinder, so that the cylinder (2) is fixedly connected with the saddle seat (1).

5. The round steel manual contact ultrasonic detection stable scanning device is characterized in that the inner diameters of the third through hole and the fourth through hole are the same and larger than the outer diameter of the ultrasonic probe (6), a convex ring (14) is arranged on the inner wall of the fourth through hole, the inner diameter of the convex ring (14) is larger than the outer diameter of the ultrasonic probe (6), and the gasket (53) abuts against the upper end of the convex ring (14).

6. The round steel manual contact ultrasonic detection stable scanning device according to claim 5, wherein the cross section of the bottom surface of the round steel contact part (12) is in an inverted V shape, both sides of the bottom surface of the inverted V shape are provided with wear-resistant layers (13), and the vertex angle of the inverted V shape is fillet transition.

7. A using method of a round steel manual contact ultrasonic detection stable scanning device is suitable for the round steel manual contact ultrasonic detection stable scanning device of claim 6,

rotating the position of the hollow bolt (3) to enable the bottom surface of the ultrasonic probe (6) to be flush with the inverted V-shaped top surface of the saddle seat (1), then placing the saddle seat (1) on the round steel (7) to enable two sides of the inverted V-shaped bottom surface to be in contact with the round steel (7);

the hollow bolt (3) is adjusted to be pushed into the cylinder (2), the first spring (43) and the second spring (52) are compressed, and the elastic balance position of the ultrasonic probe (6) moves downwards until the ultrasonic probe (6) contacts the round steel (7);

continuously adjusting the hollow bolt (3) to push into the cylinder (2), keeping the telescopic length of the second spring (52) unchanged, continuously compressing the first spring (43), and generating pressure to the round steel (7) by the ultrasonic probe (6) in the compression process of the first spring (43) and gradually increasing the pressure;

the pushing position of the hollow bolt (3) is adjusted to enable the ultrasonic probe (6) to have proper pressure on the round steel (7), and then the ultrasonic detection instrument is checked and the round steel (7) is detected and scanned.

8. The use method of the saddle (1) is characterized in that when the specification of the round steel (7) is smaller, the distance between the cylindrical surface of the round steel (7) and the highest point of the round steel contact part (12) of the saddle seat (1) is smaller, and the protruding length of the ultrasonic probe (6) relative to the highest point of the round steel contact part (12) is smaller when the ultrasonic probe contacts the round steel (7);

when the specification of the round steel (7) is large, the distance between the cylinder surface of the round steel (7) and the highest point of the round steel contact part (12) of the saddle seat (1) is large, and the extension length of the ultrasonic probe (6) relative to the highest point of the round steel contact part (12) is large when the ultrasonic probe contacts the round steel (7).

9. The use method as claimed in claim 7, characterized in that when the bottom gasket (53) faces one direction, the hollow bolt (3) is rotated to enable the ultrasonic probe (6) to achieve proper pressure for realizing stable scanning when detecting round steel (7) in a certain specification range, and the direction of the bottom gasket (53) is changed to be suitable for stable scanning of round steel (7) in another specification range under proper pressure of the probe.

10. The use method as claimed in claim 7, characterized in that when replacing the ultrasonic probe (6) with different specifications, the saddle (1) is separated from the cylinder (2), the ultrasonic probe (6) is replaced, simultaneously the adaptive gasket (53) and probe hoop (51) are selected, the ultrasonic probe (6) is installed in the cylinder (2), and the saddle (1) and the cylinder (2) are connected and fixed by screw thread.

Technical Field

The invention relates to the technical field of material detection, in particular to a round steel manual contact ultrasonic detection stable scanning device and a using method thereof.

Background

Ultrasonic flaw detection is an important means for detecting the internal quality of workpieces made of dense elastic materials such as metal materials, ultrasonic waves are transmitted into the workpieces through a coupling medium by a probe during flaw detection, the ultrasonic waves are reflected when encountering a heterogeneous interface in the workpieces, and part of the ultrasonic waves return to the probe to be received and converted into electric signals to be transmitted to an ultrasonic flaw detector and display the reflected signals of corresponding positions in the ultrasonic flaw detector, so that the quality condition of the workpieces is judged. The manual contact ultrasonic detection is a commonly used process for detecting the internal quality of round steel, is commonly used for ultrasonic detection of small-batch round steel, and is an essential auxiliary means for defect searching and verification in batch automatic ultrasonic detection. When manual ultrasonic detection is carried out by a round steel contact method, the surface of the probe is in line contact with the surface of the round steel, the probe is easy to swing when the probe is held by hand for scanning, the contact position and the contact force of the probe and the round steel are difficult to keep stable, scanning signals are unstable, the consistency of multiple scanning signals of the same defect is poor, the scanning result difference of different operators is obvious, and the detection and judgment accuracy is seriously influenced. At present, a plurality of special auxiliary tools for manual contact ultrasonic testing are available, but the existing various auxiliary tools have complicated and heavy structures and inconvenient operation, and are not suitable for contact manual ultrasonic stable testing of round steel with various specifications.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a round steel manual contact ultrasonic detection stable scanning device and a using method thereof, so that the probe surface position which is in contact with the round steel during manual scanning is stable, the pressure of the probe and the round steel is stable, the influence of swinging and pressure fluctuation of a handheld probe on the round steel on the stability and repeatability of scanning signals is avoided, and the detection accuracy is effectively improved.

The technical purpose of the invention is realized by the following technical scheme:

a round steel manual contact method ultrasonic detection stable scanning device comprises a saddle seat, a hollow bolt, a cylinder, an elastic box and an elastic body, wherein the elastic box and the elastic body are arranged in the cylinder;

the elastic box comprises an upper sleeve, a first spring and a lower sleeve, the lower sleeve is embedded into the upper sleeve and is in clearance fit with the upper sleeve, the first spring is arranged between the upper sleeve and the lower sleeve and is in a compressed state, a first through hole is formed in the top end of the upper sleeve, a second through hole is formed in the bottom end of the lower sleeve, the ultrasonic probe is located below the lower sleeve, a probe line interface at the top end of the ultrasonic probe is embedded into the second through hole, and the probe line sequentially penetrates through the hollow bolt and the upper sleeve to be connected with the probe line interface in the elastic box;

the elastomer includes probe band, second spring and packing ring, the cylinder and the ultrasonic probe fixed connection of ultrasonic probe are established to probe band cover, the second spring surrounds outside ultrasonic probe, packing ring external diameter and probe through-hole internal diameter clearance fit, the second spring sets up and is in compression state between probe band and packing ring.

In one embodiment, the gasket is provided with a gasket flange, and the inner diameter of the gasket flange is in clearance fit with the diameter of the ultrasonic probe.

In one embodiment, the saddle comprises a barrel body butt joint part connected with the cylinder and a round steel contact part in contact with the round steel, a third through hole is formed in the center of the barrel body butt joint part, a fourth through hole is formed in the center of the round steel contact part, the third through hole and the fourth through hole form a probe through hole for the ultrasonic probe to pass through, and the gasket is arranged at the fourth through hole.

In one embodiment, the inner wall of the lower opening of the cylinder is provided with internal threads, the outer wall of the butt joint part of the cylinder body is provided with external threads, and the cylinder is in threaded connection with the butt joint part of the cylinder body, so that the cylinder is fixedly connected with the saddle.

In one embodiment, the inner diameters of the third through hole and the fourth through hole are the same and are larger than the outer diameter of the ultrasonic probe, the inner wall of the fourth through hole is provided with a convex ring, the inner diameter of the convex ring is larger than the outer diameter of the ultrasonic probe, and the gasket abuts against the upper end of the convex ring.

In one embodiment, the cross section of the bottom surface of the round steel contact part is in an inverted V shape, two sides of the inverted V shape are both provided with a wear-resistant layer, the wear-resistant layer is detachable, and the vertex angle of the inverted V shape is excessive for a fillet.

A use method of a round steel manual contact ultrasonic detection stable scanning device comprises the following steps:

rotating the position of the hollow bolt to enable the ultrasonic probe to be flush with the inverted V-shaped top surface of the saddle seat, and then placing the saddle seat on the round steel to enable two sides of the inverted V-shaped bottom surface to be in contact with the round steel;

the hollow bolt is adjusted to push towards the cylinder, the first spring and the second spring are compressed, and the elastic balance position of the ultrasonic probe moves downwards until the ultrasonic probe contacts the round steel;

continuously adjusting the hollow bolt to push towards the cylinder, keeping the telescopic length of the second spring unchanged, continuously compressing the first spring, and gradually increasing the pressure of the ultrasonic probe on the round steel in the compression process of the first spring;

and adjusting the pushing position of the hollow bolt to enable the ultrasonic probe to have proper pressure on the round steel, and then checking an ultrasonic detection instrument and scanning the round steel.

In one embodiment, when the specification of the round steel is smaller, the distance between the cylindrical surface of the round steel and the highest point of the round steel contact part of the saddle seat is smaller, and the extension length of the ultrasonic probe relative to the highest point of the round steel contact part is smaller when the ultrasonic probe contacts the round steel.

In one embodiment, when the specification of the round steel is larger, the distance between the cylindrical surface of the round steel and the highest point of the round steel contact part of the saddle seat is larger, and the extension length of the ultrasonic probe relative to the highest point of the round steel contact part is larger when the ultrasonic probe contacts the round steel.

In one embodiment, when the bottom gasket faces one direction, the hollow bolt is rotated to enable the ultrasonic probe to achieve proper pressure to realize stable scanning when detecting round steel in a certain specification range, and the change of the direction of the bottom gasket can adapt to the stable scanning of the round steel in another specification range under the proper pressure of the probe.

In one embodiment, when the ultrasonic probes with different specifications are replaced, the saddle seat is separated from the cylinder, the ultrasonic probe is replaced, meanwhile, the matched gasket and the probe hoop are selected, and the ultrasonic probe is installed in the cylinder, so that the saddle seat is fixedly connected with the cylinder through threads.

In conclusion, the invention has the following beneficial effects:

the invention has simple structure, portability, flexibility, stable performance and reliable detection, realizes the longitudinal stable contact of the central line of the probe surface and the round steel when scanning by detecting, overcomes the influence of unstable position of the probe surface contacted with the round steel caused by the swinging of the probe when scanning by holding the probe by hand, and improves the signal stability; the pressure of the ultrasonic probe and the pressure of the round steel are stable and consistent when the ultrasonic instrument is checked and detected, the influence of pressure fluctuation of the handheld probe on scanning signal fluctuation is eliminated, and the detection accuracy is improved; when the detected defects are repeatedly scanned and confirmed in the detection process, the consistency signals of repeated scanning can be quickly and accurately acquired, and the defect judgment efficiency and accuracy are improved;

the invention has large specification range of the round steel to be detected, and can be respectively suitable for the stable scanning of the round steel in two specification ranges under the appropriate pressure of the probe when the bottom gasket faces to different directions up and down;

the invention is suitable for probes with various diameter specifications, and the corresponding probe hoop and bottom gasket are only required to be replaced when the diameter of the probe is changed;

the invention has good economy, the pressure of the probe and the round steel is uniform during scanning, the abrasion of the probe is reduced, and the service life of the probe is correspondingly prolonged; the probe wire of the invention extends into the elastic box to be connected with the probe, so that the phenomena of breakage, looseness and the like are avoided, and the service life of the probe wire is prolonged.

The invention has simple, safe and efficient operation, is easy to learn and use, has the size suitable for handheld operation and quick scanning, and improves the detection scanning efficiency; the invention has good popularization and application value, and can be popularized and applied to the manual ultrasonic detection of various shaft type, seamless pipe or various cylindrical and circular pipe workpieces by a contact method; the base fitting for changing the inverted V-shaped bottom of the round steel contact part of the saddle seat into a plane can be used for manual ultrasonic detection of a plane workpiece by a contact method.

Drawings

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

FIG. 2 is a schematic view in the direction A-A of FIG. 1;

fig. 3 is a schematic view in the direction B-B of fig. 1.

In the figure: 1-saddle seat, 11-barrel butt joint part, 12-round steel contact part, 13-wear layer, 14-convex ring, 2-cylinder, 3-hollow bolt, 4-elastic box, 41-upper sleeve, 42-lower sleeve, 43-first spring, 5-elastic body, 51-probe hoop, 52-second spring, 53-washer, 54-washer hem, 6-ultrasonic probe, 61-probe line interface, 62-probe line and 7-round steel.

Detailed Description

The invention is described in detail below with reference to the figures and examples.

It should be noted that all the directional terms such as "upper" and "lower" referred to herein are used with respect to the view of the drawings, and are only for convenience of description, and should not be construed as limiting the technical solution.

The invention provides a round steel manual contact ultrasonic detection stable scanning device, which comprises a saddle 1, a hollow bolt 3, a cylinder 2, an elastic box 4 and an elastic body 5, wherein the elastic box 4 and the elastic body 5 are arranged in the cylinder 2, and the elastic box is arranged in the cylinder 2;

the saddle seat 1 comprises a barrel body butt joint part 11 connected with the barrel 2 and a round steel contact part 12 contacted with the round steel 7, a third through hole is formed in the center of the barrel body butt joint part 11, a fourth through hole is formed in the center of the round steel contact part 12, the inner diameters of the third through hole and the fourth through hole are the same and are larger than the outer diameter of the ultrasonic probe 6, a convex ring 14 is arranged on the inner wall of the fourth through hole, the inner diameter of the convex ring 14 is larger than the outer diameter of the ultrasonic probe 6, the third through hole and the fourth through hole form a probe through hole convenient for the ultrasonic probe 6 to pass through, the probe through hole vertically penetrates through the whole saddle seat 1, the probe through hole is communicated with the interior of the barrel 2, the lower opening of the barrel 2 is fixedly connected with the barrel body butt joint part 11, specifically, an internal thread is arranged on the inner wall of the lower opening of the barrel 2, an external thread is arranged on the outer wall of the barrel body butt joint part 11, and the barrel 2 is in threaded connection with the barrel body butt joint part 11 so that the barrel 2 is fixedly connected with the saddle seat 1; the cross section of the bottom surface of the round steel contact part 12 is in an inverted V shape, the inverted V-shaped structure is convenient for the positioning of the invention on the round steel 7, the two sides of the bottom surface of the round steel contact part 12 are provided with the wear-resistant layers 13, and particularly, the wear-resistant layers 13 are detachable.

The upper bottom of the cylinder 2 is provided with a central screw hole, the bottom end of the hollow bolt 3 is screwed into the cylinder 2 through the central screw hole, the hollow bolt 3 has the specific structure that the outer wall of the hollow bolt 3 is provided with external threads, the middle of the hollow bolt 3 is provided with a round hole convenient for threading, and the round hole is led into the cylinder 2;

the elastic box 4 comprises an upper sleeve 41, a first spring 43 and a lower sleeve 42, the upper sleeve 41 is sleeved outside the lower sleeve 42, the outer circle of the upper sleeve 41 is in clearance fit with the inner circle of the cylinder 2, the first spring 43 is arranged between the upper sleeve 41 and the lower sleeve 42 and is in a compression state, the first spring 43 enables the whole body formed by the upper sleeve 41 and the lower sleeve 42 to elastically stretch, a first through hole is formed in the top end of the upper sleeve 41, a second through hole is formed in the bottom end of the lower sleeve 42, the ultrasonic probe 6 is located below the lower sleeve 42, a probe line interface 61 in the top end of the ultrasonic probe 6 is embedded into the second through hole, and a probe line 62 sequentially penetrates through the hollow bolt 3 and the upper sleeve 41 to be connected with the probe line interface 61;

the elastic body 5 comprises a gasket 53, a probe hoop 51 and a second spring 52, the gasket 53 is arranged on the convex ring 14, the outer diameter of the gasket 53 is in clearance fit with the inner diameter of the through hole of the barrel probe, the inner wall of the gasket 53 is in clearance fit with the excircle of the ultrasonic probe 6, the probe hoop 51 is sleeved on the upper part close to the ultrasonic probe 6 and fixedly connected with the ultrasonic probe 6, the second spring 52 is sleeved outside the ultrasonic probe 6, the second spring 52 is arranged between the probe hoop 51 and the gasket 53 and is in a compression state, and the bottom end of the second spring 52 is abutted against the gasket 53, so that the second spring 52 enables the top end of the ultrasonic probe 6 to be abutted against the bottom end of the lower barrel 42, and the ultrasonic probe 6 is in an elastic balance position of the first spring 43 and the second spring 52.

Further, the washer 53 is provided with a washer bead 54, as shown in the enlarged portion of the drawing, the inner diameter of the washer bead 54 being a clearance fit with the probe diameter.

The invention can detect the round steel 7 with different specifications and is also suitable for the ultrasonic probes 6 with different specifications, which comprises the following steps:

when the ultrasonic probe is used for detecting the round steel 7 with a smaller specification, the diameter of the round steel 7 is smaller, and the distance between the round steel 7 and the top surface of the round steel contact part 12 of the saddle 1 is smaller, so the extending length of the ultrasonic probe 6 relative to the top surface of the round steel contact part 12 is reduced.

When the ultrasonic probe is used for detecting the round steel 7 with larger specification, the diameter of the round steel 7 is larger, and the distance between the round steel 7 and the top surface of the round steel contact part 12 of the saddle 1 is larger, so the extending length of the ultrasonic probe 6 relative to the top surface of the round steel contact part 12 is increased.

It can be understood that no matter what kind of specification's round steel 7, the purpose of adjusting the relative round steel contact site 12 top surface extension length of ultrasonic probe 6 all is in order to make ultrasonic probe 6 and round steel 7 surface contact, ensures simultaneously that ultrasonic probe 6 is suitable to round steel 7's pressure, realizes reliably scanning round steel 7, avoids damaging ultrasonic probe 6 simultaneously.

When the ultrasonic probes 6 with different diameters need to be replaced, the threaded interfaces of the saddle 1 and the barrel are unscrewed, the original ultrasonic probe 6 can be taken down by disassembling the probe line and the probe line interface 61, the elastic body 5 is disassembled at the same time, the new ultrasonic probe 6 and the probe hoop 51 are replaced, the probe line interface 61 is connected with the probe line 62, the washer 53 matched in the saddle 1 is replaced at the same time, the new ultrasonic probe 6 and the elastic body 5 are placed into the barrel 2, and finally the saddle 1 and the barrel 2 are fixedly connected, so that the replacement of the ultrasonic probes 6 with different specifications is completed.

The invention also provides a use method of the round steel manual contact ultrasonic detection stable scanning device, which comprises the following steps:

rotating the position of the hollow bolt 3 to enable the ultrasonic probe 6 to be flush with the top surface of the inverted V-shaped saddle 1, and then placing the saddle 1 on the round steel 7 to enable two sides of the inverted V-shaped saddle to be in contact with the round steel 7;

the hollow bolt 3 is adjusted to be pushed into the cylinder 2, the first spring 43 and the second spring 52 are compressed, and the elastic balance position of the ultrasonic probe 6 moves downwards until the ultrasonic probe 6 contacts the round steel 7;

continuously adjusting the hollow bolt 3 to push into the cylinder 2, keeping the telescopic length of the second spring 52 unchanged, continuously compressing the first spring 43, and gradually increasing the pressure of the ultrasonic probe 6 on the round steel 7 in the compression process of the first spring 43;

and adjusting the pushing position of the hollow bolt 3 to ensure that the ultrasonic probe 6 has proper pressure on the round steel 7, and checking an ultrasonic detection instrument and detecting and scanning the round steel 7.

In one embodiment, when the size of the round steel 7 is smaller, the distance between the cylindrical surface of the round steel 7 and the top surface of the round steel contact part 12 of the saddle 1 is smaller, and the protruding length of the ultrasonic probe 6 relative to the top surface of the round steel contact part 12 is smaller when the ultrasonic probe contacts the round steel 7.

In one embodiment, when the size of the round steel 7 is larger, the distance between the cylindrical surface of the round steel 7 and the top surface of the round steel contact part 12 of the saddle 1 is larger, and the extension length of the ultrasonic probe 6 relative to the top surface of the round steel contact part 12 is larger when the ultrasonic probe contacts the round steel 7.

In one embodiment, when the bottom gasket 53 faces one direction, the hollow bolt 3 is rotated to enable the ultrasonic probe 6 to achieve proper pressure to realize stable scanning when detecting round steel 7 in a certain specification range, and the direction of the bottom gasket 53 is changed to be suitable for stable scanning of round steel 7 in another specification range under proper pressure of the probe.

In one embodiment, when the ultrasonic probe 6 with different specifications is replaced, the saddle 1 is separated from the cylinder 2, the ultrasonic probe 6 is replaced, the matched washer 53 and the probe hoop 51 are selected, and the ultrasonic probe 6 is installed in the cylinder 2, so that the saddle 1 and the cylinder 2 are fixedly connected through threads.

The ultrasonic probe 6 of the invention can stably and accurately detect scanning signals of the round steel 7, can ensure that the central line of the end surface of the ultrasonic probe 6 is vertically and stably contacted with the round steel 7, realizes stable and consistent pressure of the ultrasonic probe 6 and the round steel 7 when an ultrasonic instrument checks and detects scanning, eliminates the influence of handheld probe swing and pressure fluctuation on the scanning signal stability, and improves the detection accuracy; the signals are stable and consistent when the detected defects are repeatedly scanned and confirmed, and the defect judgment efficiency and accuracy are improved.

The pressure of the ultrasonic probe 6 and the round steel 7 is uniform, the abrasion of the ultrasonic probe 6 is reduced, and the service life of the ultrasonic probe 6 is correspondingly prolonged. The probe line 62 extends into the elastic box 4 and is connected with the probe line interface 61, so that the phenomena of breakage, looseness and the like are avoided, and the service life of the probe line 62 is prolonged.

The invention has good popularization and application value, and can be popularized and applied to the manual ultrasonic detection of various shaft type, seamless pipe or various cylindrical and circular pipe workpieces by a contact method. It can be understood that the V-shaped concave surface of the round steel contact part 12 of the present invention can be used for detecting a plane workpiece when the horizontal surface is changed.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.