阅读说明：本技术 一种通用螺栓预紧力检测超声探头及其检测方法 (Universal bolt pretightening force detection ultrasonic probe and detection method thereof ) 是由 曹宇 孙鹏飞 张连新 李芳� 肖虹 于长志 刘坤 吴祉群 于 2019-11-13 设计创作，主要内容包括：本发明公开了一种通用螺栓预紧力检测超声探头及其检测方法,包括：超声线缆头、超声探头上外壳、弹簧、超声探头下外壳、滑块和超声探头的探针；超声线缆头上端固定在超声探头上外壳上端,超声探头上外壳与超声探头下外壳固定连接,超声探头下外壳内设有测量通道,测量通道与安装孔连通,所述测量通道内安装有弹簧和滑块,弹簧上端与超声探头上外壳连接,弹簧下端与滑块连接,滑块两侧与声探头下外壳内壁接触,滑块能够在测量通道内上下滑动,超声探头的探针上端与超声线缆头连接,超声线缆头下端依次穿过安装孔、滑块向测量通道外延伸；本发明中的装置和方法能够适应超声检测多种类型的螺柱和螺栓,具有通用性较好的技术效果。(The invention discloses an ultrasonic probe for detecting the pretightening force of a universal bolt and a detection method thereof, wherein the ultrasonic probe comprises the following components: the ultrasonic cable head, the upper shell of the ultrasonic probe, the spring, the lower shell of the ultrasonic probe, the sliding block and the probe of the ultrasonic probe; the upper end of the ultrasonic cable head is fixed at the upper end of the upper shell of the ultrasonic probe, the upper shell of the ultrasonic probe is fixedly connected with the lower shell of the ultrasonic probe, a measuring channel is arranged in the lower shell of the ultrasonic probe and is communicated with the mounting hole, a spring and a sliding block are arranged in the measuring channel, the upper end of the spring is connected with the upper shell of the ultrasonic probe, the lower end of the spring is connected with the sliding block, two sides of the sliding block are contacted with the inner wall of the lower shell of the ultrasonic probe, the sliding block can slide up and down in the measuring channel, the upper end of a probe of the ultrasonic probe is connected with the ultrasonic cable head, and the lower; the device and the method can be suitable for ultrasonically detecting various studs and bolts, and have the technical effect of good universality.)

1. A universal bolt pretension detection ultrasonic probe, characterized in that the probe comprises:

the ultrasonic cable head (1), the upper ultrasonic probe shell (2), the spring (4), the lower ultrasonic probe shell (5), the sliding block (6) and the probe (7) of the ultrasonic probe;

the lower end of the ultrasonic cable head (1) is inserted into a mounting hole on the upper shell (2) of the ultrasonic probe, the upper end of the ultrasonic cable head (1) is fixed at the upper end of the upper shell (2) of the ultrasonic probe, the upper shell (2) of the ultrasonic probe is fixedly connected with the lower shell (5) of the ultrasonic probe, a measuring channel is arranged in the lower shell (5) of the ultrasonic probe and is communicated with the mounting hole, install spring (4) and slider (6) in the measurement passageway, spring (4) upper end and supersound probe go up shell (2) and be connected, spring (4) lower extreme is connected with slider (6), slider (6) both sides and shell (5) inner wall contact under the sound probe, slider (6) can slide from top to bottom in the measurement passageway, the probe (7) upper end and the ultrasonic cable head (1) of ultrasonic probe are connected, ultrasonic cable head (1) lower extreme passes the mounting hole in proper order, slider (6) extend to the measurement passageway outward.

2. The universal bolt pretension detection ultrasonic probe according to claim 1, wherein the upper ultrasonic probe shell (2) and the lower ultrasonic probe shell (5) are both ferromagnetic metal shells.

3. The universal bolt pretension detection ultrasonic probe according to claim 1, wherein the slide block (6) is provided with a through hole for the probe (7) of the ultrasonic probe to pass through.

4. The universal bolt pretension detection ultrasonic probe according to claim 1, characterized in that the probe further comprises a magnet (3), the magnet (3) is installed in the ultrasonic probe upper housing (2), or the magnet (3) is installed in the ultrasonic probe lower housing (5), or the magnet (3) is installed between the ultrasonic probe upper housing (2) and the ultrasonic probe lower housing (5).

5. The universal bolt pretension detection ultrasonic probe according to claim 4, wherein the magnet (3) comprises 2 magnet pieces, 2 magnet pieces being symmetrical about the axis of the probe, or the magnet (3) is a magnetic ring.

6. The universal bolt pretightening force detection ultrasonic probe according to claim 1, wherein the axis of the ultrasonic cable head (1) is coincident with the axis of the upper shell (2) of the ultrasonic probe, the axis of the lower shell (5) of the ultrasonic probe, the central line of the measurement channel and the axis of the slider (6).

7. The universal bolt pretension force detection ultrasonic probe according to claim 1, wherein during measurement, a piezoelectric ceramic piece is fixed at the upper end of the tested stud or bolt, and the piezoelectric ceramic piece is contacted with the lower end of a probe (7) of the ultrasonic probe.

8. The universal bolt pretension detection ultrasonic probe according to claim 7, wherein the piezoelectric ceramic plate is fixed on the upper end of the tested stud or bolt through conductive glue.

9. The universal bolt pretension detection ultrasonic probe according to claim 7, wherein the diameter of the measurement channel is matched with the outer diameter of the stud, the diameter of the measurement channel is larger than or equal to the radius of the inner square hole of the hexagon socket head cap bolt, and the diameter of the measurement channel is larger than or equal to the outer diameter of the hexagon socket head cap bolt or the outer hexagon bolt.

10. The method for detecting the universal bolt pretension detection ultrasonic probe according to any one of claims 1-9, wherein the method comprises the following steps:

sticking a piezoelectric ceramic piece on the upper end of the bolt or the stud to be detected;

a probe (7) of the ultrasonic probe is contacted with the piezoelectric ceramic piece;

the lower shell (5) of the ultrasonic probe is connected with the surface of the bolt or the stud to be detected to form a positive electrode and a negative electrode for detection.

Technical Field

The invention relates to the field of bolt pretightening force detection, in particular to an ultrasonic probe for detecting the pretightening force of a universal bolt and a detection method thereof.

Background

The bolt connection is a simple, low-cost and reliable connection mode and is widely applied to various industries. The regular or real-time monitoring of the variation of the bolt pretightening force is an important means for ensuring the safe and reliable operation of the bolt fastening system. The ultrasonic bolt pretightening force detection system has the characteristics of simple structure, rapidness, convenience, high precision and the like, and has a good application prospect. However, when the existing ultrasonic bolt pretightening force detection system detects different types of bolts, different ultrasonic probes need to be equipped, for the stud, the hexagon socket head cap screw and the outer hexagon bolt of the same specification, three ultrasonic probes with different sizes are needed when the three types of bolts are detected, the ultrasonic probes need to be frequently replaced in the detection process, the operation is complex, and the requirement of rapid detection in a detection field cannot be met. Therefore, the existing ultrasonic bolt pretightening force detection system has the technical problem of poor universality.

Disclosure of Invention

The invention aims to provide an ultrasonic probe for detecting the pretightening force of a universal bolt and a detection method thereof, and solves the technical problem that the existing ultrasonic bolt pretightening force detection system is poor in universality.

In order to achieve the above object, the present invention provides an ultrasonic probe for detecting a pretightening force of a universal bolt, the probe comprising:

the ultrasonic cable head, the upper shell of the ultrasonic probe, the spring, the lower shell of the ultrasonic probe, the sliding block and the probe of the ultrasonic probe;

the utility model discloses a measuring channel, including ultrasonic probe, ultrasonic cable head, shell, measuring channel, spring and slider, ultrasonic probe upper shell, shell and the contact of shell inner wall under the slider both sides and the sonic probe, the first lower extreme of ultrasonic cable inserts the mounting hole on the shell on the ultrasonic probe, and ultrasonic cable head upper end is fixed in ultrasonic probe upper shell upper end, and shell and ultrasonic probe lower shell fixed connection under the ultrasonic probe are equipped with measuring channel under the ultrasonic probe, and measuring channel and mounting hole intercommunication, install spring and slider in the measuring channel, the spring upper end is connected with ultrasonic probe upper shell, and the spring lower extreme is connected with the slider, and the slider both sides contact with the shell inner wall under the sonic probe, and the slider can slide from top to bottom in measuring.

The principle of the invention is as follows: the ultrasonic probe can utilize the ultrasonic bolt pretightening force detection system to respectively detect three types of objects, namely a stud, an inner hexagon bolt and an outer hexagon bolt, when the stud is the stud, the upper end of the stud is inserted into the measuring channel, the probe of the ultrasonic probe is contacted with the piezoelectric ceramic piece on the stud to complete measurement, when the stud is the inner hexagon bolt or the outer hexagon bolt, the upper end of the bolt is connected with the lower end of the measuring channel, and the probe of the ultrasonic probe is contacted with the piezoelectric ceramic piece on the bolt to complete measurement.

Furthermore, the upper shell of the ultrasonic probe and the lower shell of the ultrasonic probe are both ferromagnetic metal shells, and the ferromagnetic metal shells are designed to facilitate the adsorption of magnets.

Furthermore, a through hole for the probe of the ultrasonic probe to pass through is formed in the sliding block, the through hole is designed to facilitate the probe of the ultrasonic probe to pass through, the size of the through hole is matched with that of the probe of the ultrasonic probe, and the sliding block is an insulating sliding block and is used for insulating and protecting the probe.

Furthermore, the probe also comprises a magnet, wherein the magnet is arranged in the upper shell of the ultrasonic probe, or the magnet is arranged in the lower shell of the ultrasonic probe, or the magnet is arranged between the upper shell of the ultrasonic probe and the lower shell of the ultrasonic probe. The purpose of the design is to attract the bolt or the stud by means of the magnet in the probe, and poor contact between the bolt and the probe in the detection process is prevented.

Further, the magnet comprises 2 magnet blocks, the 2 magnet blocks are symmetrical about the axis of the probe, or the magnet (3) is a magnetic ring, and the magnet is designed to enable the adsorption force of the magnet to be uniformly distributed and enable the force to be uniformly applied.

Furthermore, the axis of the ultrasonic cable head is coincided with the axis of the upper shell of the ultrasonic probe, the axis of the lower shell of the ultrasonic probe, the central line of the measuring channel and the axis of the sliding block.

Furthermore, during measurement, a piezoelectric ceramic piece is fixed at the upper end of the stud or the bolt to be measured and is in contact with the lower end of the probe of the ultrasonic probe.

Furthermore, the piezoelectric ceramic plate is fixed at the upper end of the tested stud or bolt through conductive glue.

Furthermore, the diameter of the measuring channel is matched with the outer diameter of the stud, the diameter of the measuring channel is larger than or equal to the radius of the inner square hole of the inner hexagon bolt, and the diameter of the measuring channel is larger than or equal to the outer diameter of the inner hexagon or the outer hexagon bolt.

The invention also provides a detection method based on the universal bolt pretightening force detection ultrasonic probe, which comprises the following steps:

sticking a piezoelectric ceramic piece on the upper end of the bolt or the stud to be detected;

contacting a probe of an ultrasonic probe with the piezoelectric ceramic piece;

the lower shell of the ultrasonic probe is connected with the surface of the bolt or the stud to be detected to form a positive electrode and a negative electrode for detection.

One or more technical schemes provided by the invention at least have the following technical effects or advantages:

the device and the method can be suitable for various studs and bolts and have the technical effect of good universality.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention;

FIG. 1 is a schematic diagram of a universal bolt pretension detection ultrasonic probe in the present invention;

FIG. 2 is a schematic view of the measurement when a stud;

FIG. 3 is a schematic view of the measurement when it is a socket head cap screw;

FIG. 4 is a schematic view of the measurement when it is an outer hexagon bolt;

wherein, 1-ultrasonic cable head, 2-ultrasonic probe upper shell, 3-magnet, 4-spring, 5-ultrasonic probe lower shell, 6-slide block, 7-ultrasonic probe.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be constructed and operated in a particular orientation and thus are not to be considered limiting.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1, an embodiment of the present invention provides a universal bolt pretension detection ultrasonic probe, including:

the ultrasonic cable comprises an ultrasonic cable head 1, an ultrasonic probe upper shell 2, a spring 4, an ultrasonic probe lower shell 5, a sliding block 6 and a probe 7 of the ultrasonic probe;

the lower end of the ultrasonic cable head 1 is inserted into a mounting hole in the upper shell 2 of the ultrasonic probe, the upper end of the ultrasonic cable head 1 is fixed at the upper end of the upper shell 2 of the ultrasonic probe, the upper shell 2 of the ultrasonic probe is fixedly connected with the lower shell 5 of the ultrasonic probe, a measuring channel is arranged in the lower shell 5 of the ultrasonic probe and is communicated with the mounting hole, a spring 4 and a sliding block 6 are arranged in the measuring channel, the upper end of the spring 4 is connected with the upper shell 2 of the ultrasonic probe, the lower end of the spring 4 is connected with the sliding block 6, two sides of the sliding block 6 are contacted with the inner wall of the lower shell 5 of the ultrasonic probe, the sliding block 6 can slide up and down in the measuring channel, the upper end of a probe 7 of the ultrasonic probe is connected with the ultrasonic cable head 1.

In the embodiment of the present invention, the upper ultrasonic probe housing 2 and the lower ultrasonic probe housing 5 are both ferromagnetic metal housings. The slide block 5 is provided with a through hole for the probe 7 of the ultrasonic probe to pass through. The probe further comprises a magnet 3, wherein the magnet 3 is arranged in the upper shell 2 of the ultrasonic probe, or the magnet 3 is arranged in the lower shell 5 of the ultrasonic probe, or the magnet 3 is arranged between the upper shell 2 of the ultrasonic probe and the lower shell 5 of the ultrasonic probe.

Wherein, in the embodiment of the invention, the magnet 3 comprises 2 magnet blocks, and the 2 magnet blocks are symmetrical about the axis of the probe. The axis of the ultrasonic cable head 1 coincides with the axis of the upper shell 2 of the ultrasonic probe, the axis of the lower shell 5 of the ultrasonic probe, the central line of the measuring channel and the axis of the slide block 6. Referring to fig. 2-4, during measurement, a piezoelectric ceramic piece is fixed at the upper end of the stud or bolt to be measured, and the piezoelectric ceramic piece is in contact with the lower end of the probe 7 of the ultrasonic probe. The piezoelectric ceramic piece is fixed at the upper end of the tested stud or bolt through conductive glue. The diameter of the measuring channel is matched with the outer diameter of the stud, the diameter of the measuring channel is larger than or equal to the radius of the inner square hole of the inner hexagon bolt, and the diameter of the measuring channel is larger than or equal to the outer diameter of the inner hexagon bolt or the outer hexagon bolt.

In an embodiment of the present invention, the present invention further provides a detection method based on the universal bolt pretension detection ultrasonic probe, where the method includes:

sticking a piezoelectric ceramic piece on the upper end of the bolt or the stud to be detected;

a probe 7 of the ultrasonic probe is contacted with the piezoelectric ceramic piece;

the lower shell 5 of the ultrasonic probe is connected with the surface of a bolt or a stud to be detected to form a positive electrode and a negative electrode for detection.

Wherein, the size requirement of this device is:

1: the inner diameter of the lower shell is slightly larger than the radius of the stud, and the stud can be clamped;

2: the inner diameter of the lower shell is not less than the radius of an inner square hole of the hexagon socket head cap screw;

3: the outer diameter of the lower shell is not more than the outer diameters of the inner hexagon bolt and the outer hexagon bolt;

4: under the condition that the spring is relaxed, the ultrasonic probe can contact the surface of the inner square hole of the hexagon socket head cap screw.

When the piezoelectric ceramic probe is used, the surfaces of the bolt and the stud are firstly adhered with piezoelectric ceramic pieces by using conductive glue, the probe is connected with the piezoelectric ceramic, and the shell of the probe is connected with the surface of the bolt or the stud to form a positive electrode and a negative electrode. The bolt or the stud is attracted by the magnet in the probe, so that poor contact between the bolt and the probe in the detection process is prevented.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.