Bolt stress detection device

Abstract

The utility model discloses a bolt stress detection device, which belongs to the field of ultrasonic detection technology; it includes: a probe, a magnetic suction component, an elastic abutment component and an ultrasonic generating component, the probe includes a probe body for inserting into the bolt; the magnetic suction component includes a magnetic suction unit with variable magnetic force, the magnetic suction unit is arranged in the probe body, the magnetic suction unit can change its own magnetic force, and control the magnetic suction force on the bolt; the elastic abutment component includes a spring embedded in the probe body, one end of the spring is fixedly connected to the probe body, and the other end of the spring is elastically abutted with the bolt; the ultrasonic generating component includes an ultrasonic detection head arranged at the end of the probe body, and the ultrasonic detection head can monitor the stress change inside the bolt. The utility model can improve the connection strength between the probe body and the bolt, and ensure that the probe is still firm in harsh environments and cannot be easily loosened.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic detection, in particular to a bolt stress detection device. Background Art

[0002] Bolts with inner holes are widely used as connecting parts in nuclear power, petrochemical and other industries. Bolts work for a long time in special harsh environments such as high temperature, high pressure, impact, vibration, corrosion, etc., and are prone to cracks, corrosion, screw or thread wear or mechanical damage. They are one of the important stress-bearing and vulnerable components in the main equipment. Therefore, it takes a long time to perform full-volume ultrasonic inspection on bolts with inner holes.

[0003] In the related art, the stress probe inserted into the bolt with an inner hole is easy to fall off the bolt during use, causing local abnormality of the equipment monitoring system, making it impossible to monitor the condition of the bolt in a timely and effective manner, posing a serious safety hazard. Utility Model Content

[0004] In view of this, it is necessary to provide a bolt stress detection device to solve the problem that the existing stress detection device is easy to fall off from the bolt.

[0005] The utility model provides a bolt stress detection device, comprising:

[0006] A probe, the probe comprising a probe body for being inserted into the bolt;

[0007] A magnetic attraction component, wherein the magnetic attraction component includes a magnetic attraction unit with variable magnetic force, wherein the magnetic attraction unit is arranged in the probe body, and the magnetic attraction unit can change the magnitude of its own magnetic force to control the magnitude of the magnetic attraction force on the bolt;

[0008] An elastic abutment component, the elastic abutment component comprises a spring sheet embedded in the probe body, one end of the spring sheet is fixedly connected to the probe body, and the other end of the spring sheet elastically abuts against the bolt;

[0009] An ultrasonic generating component includes an ultrasonic detection head arranged at the end of the probe body, and the ultrasonic detection head can monitor the stress changes inside the bolt.

[0010] Furthermore, the magnetic attraction unit includes an adjustment hole body opened inside the probe body, a rotatable permanent magnet and a magnetic blocking plate, the permanent magnet is inserted into the adjustment hole body and is rotatably connected to the adjustment hole body, and the two magnetic blocking plates are arranged opposite to each other and embedded in the probe body to divide the adjustment hole body into two parts.

[0011] Furthermore, a clamping hole for external adjustment is provided on the permanent magnet.

[0012] Furthermore, the magnetic attraction unit includes an electromagnet, and the electromagnet is arranged in the probe body.

[0013] Furthermore, the elastic abutment component also includes a groove, which is provided on the side wall of the probe body and extends along the length direction of the probe body, and the spring sheet is embedded in the groove.

[0014] Furthermore, the spring piece is in the shape of a hairpin.

[0015] Furthermore, the ultrasonic detection head includes a plurality of array elements, and the plurality of array elements are arranged in an array around a central axis of the probe body.

[0016] Furthermore, the ultrasonic detection head also includes a screw-on component, and the ultrasonic detection head is detachably connected to the probe body via the screw-on component.

[0017] Furthermore, the ultrasonic detection head also includes a data line, the data line is arranged in the probe body, and one end of the data line is electrically connected to the array element.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] (1) The utility model provides a bolt stress detection device, which is provided with a magnetic suction component, which includes a magnetic suction unit with variable magnetic force. The magnetic suction unit is provided in the probe body, and the magnetic suction unit can change its own magnetic force as needed. By adjusting the magnetic force, it can ensure that the probe is convenient and quick during installation and removal. In normal operation, the magnetic suction unit generates a strong magnetism, which can help the probe body to be firmly adsorbed on the bolt. During maintenance and repair, the magnetic suction unit generates a weak magnetism or even no magnetism, so that the probe body can be relatively loosened from the bolt, and the probe body can be easily removed from the bolt. The magnetic suction unit enhances the fixing ability of the probe body, and can remain stable even in harsh environments such as high temperature, high pressure, and vibration.

[0020] (2) The utility model provides a bolt stress detection device, which is provided with an elastic abutment assembly, which includes a spring sheet embedded in the probe body, one end of which is fixedly connected to the probe body, and the other end of which is elastically abutted against the bolt; the spring sheet provides additional mechanical fixing force through elastic abutment, further enhancing the stability of the probe. The spring sheet can also effectively absorb and buffer the vibration and impact of the bolt during operation, reducing the risk of the probe loosening or falling off due to environmental influences.

[0021] (3) The utility model provides a bolt stress detection device, wherein the magnetic attraction component and the elastic abutment component cooperate with each other. The permanent magnet can provide a strong adsorption force, and the spring sheet can provide additional mechanical support. The two cooperate with each other to improve the connection strength between the probe body and the bolt, ensuring that the probe remains firm in harsh environments and cannot be easily loosened. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 yes Figure 1 Schematic diagram of the cross section along the AA direction;

[0025] Figure 3 yes Figure 1 Schematic diagram of the cross section along the BB direction;

[0026] Figure 4 It is a structural schematic diagram of the ultrasonic detection head in the utility model;

[0027] In the figure, 100, a probe; 110, a probe body;

[0028] 200, magnetic attraction component; 210, magnetic attraction unit; 211, adjustment hole; 212, permanent magnet; 212a, snap-on hole; 213, magnetic blocking plate;

[0029] 300, elastic abutment assembly; 310, spring sheet; 320, groove;

[0030] 400, ultrasonic generating assembly; 410, ultrasonic detection head; 411, array element; 412, screw-on fitting; 413, data cable. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0032] A bolt stress detection device in this embodiment relates to the field of ultrasonic detection technology. A magnetic attraction component 200 and an elastic abutment component 300 are arranged on the main body of the probe 100. The magnetic attraction component 200 is provided with a magnetic attraction unit 210 with controllable magnetic force. The magnetic attraction unit 210 can be tightly connected with the bolt through magnetic force to prevent the main body of the probe 100 from coming out. The spring sheet 310 arranged on the elastic abutment component 300 can abut against the bolt, and the friction force of the spring sheet 310 is used to prevent the main body of the probe 100 from coming out.

[0033] See also Figures 1 to 4 A bolt stress detection device in this embodiment includes: a probe 100, a magnetic attraction component 200, an elastic abutment component 300 and an ultrasonic generating component 400. The probe 100 includes a probe 100 body, and the probe 100 body can be inserted into the bolt to monitor the stress condition of the bolt in real time.

[0034] The magnetic suction assembly 200 includes a magnetic suction unit 210 with variable magnetic force. The magnetic suction unit 210 is arranged in the main body of the probe 100. The magnetic suction unit 210 can change its own magnetic force as needed. By adjusting the magnetic force, it can ensure that the probe 100 is convenient and quick to install and remove. In normal operation, the magnetic suction unit 210 generates a strong magnetism, which can help the main body of the probe 100 to be firmly adsorbed on the bolt. During maintenance and repair, the magnetic suction unit 210 generates a weak magnetism or even no magnetism, so that the main body of the probe 100 can be relatively loosened from the bolt, making it convenient to remove the main body of the probe 100 from the bolt. The magnetic suction unit 210 enhances the fixing ability of the main body of the probe 100, and can remain stable even in harsh environments such as high temperature, high pressure, and vibration.

[0035] The elastic abutment assembly 300 includes a spring piece 310 embedded in the probe 100 body, one end of the spring piece 310 is fixedly connected to the probe 100 body, and the other end of the spring piece 310 is elastically abutted against the bolt; the spring piece 310 provides additional mechanical fixing force through elastic abutment, further enhancing the stability of the probe 100. The spring piece 310 can also effectively absorb and buffer the vibration and impact of the bolt during operation, reducing the risk of the probe 100 loosening or falling off due to environmental influences.

[0036] The ultrasonic generating assembly 400 includes an ultrasonic probe 410 disposed at the end of the probe 100 body. The ultrasonic probe 410 can monitor the stress changes inside the bolt in real time and provide accurate stress data. The ultrasonic probe 410 can perform a full volume inspection of the bolt, detect internal cracks, corrosion, wear and other defects, and ensure the safety and reliability of the bolt.

[0037] In some embodiments, see Figure 2The magnetic unit 210 includes an adjustment hole 211 opened inside the probe 100 body, a rotatable permanent magnet 212 and a magnetic blocking plate 213. The permanent magnet 212 is inserted into the adjustment hole 211 and is rotatably connected to the adjustment hole 211. Two magnetic blocking plates 213 are arranged opposite to each other and embedded in the probe 100 body to divide the adjustment hole 211 into two parts. The adjustment hole 211 uses the magnetically conductive probe 100 body as the body, and the magnetic blocking plate 213 can block the magnetic field.

[0038] When the permanent magnet 212 is rotating, and the magnetic poles are arranged relative to the magnetic blocking plate 213, one magnetic pole emits magnetic flux lines that are emitted from both ends of the magnetic blocking plate 213 and return to the other magnetic pole, forming a closed magnetic flux line, generating a strong magnetic field, and realizing a strong magnetic connection between the probe 100 body and the bolt. When the permanent magnet 212 is rotating, and the magnetic poles are arranged relatively perpendicular to the magnetic blocking plate 213, the magnetic flux lines emitted by the magnetic poles are completely blocked by the magnetic blocking plate 213, and the permanent magnet 212 shielded by the probe 100 body does not show magnetic force to the outside, so that the probe 100 body can be relatively loosened from the bolt, and the probe 100 body can be easily removed from the bolt.

[0039] In some embodiments, see Figure 2 The permanent magnet 212 is provided with a snap-in hole 212a for external adjustment, and an adjustment key can be inserted from the outside. The end of the adjustment key is adapted to the snap-in hole 212a. The adjustment key can be inserted into the snap-in hole 212a from one end of the probe 100, driving the permanent magnet 212 to rotate relative to change the position of the magnetic pole direction of the permanent magnet 212 relative to the magnetic blocking plate 213, thereby changing the external magnetism of the permanent magnet 212.

[0040] It should be particularly noted that the magnetic blocking plate 213 is specifically a copper plate, which is non-magnetic and can block the magnetic flux lines.

[0041] As an alternative embodiment, the magnetic unit 210 includes an electromagnet, which is disposed in the probe 100 body. By changing the magnitude of the current, the magnetic magnitude of the electromagnet can be changed. The electromagnet can adjust the magnetic force as needed to achieve the best adsorption state to ensure that the probe 100 will not fall off easily.

[0042] In some embodiments, the elastic abutment assembly 300 also includes a groove 320, which is opened on the side wall of the probe 100 body and extends along the length direction of the probe 100 body. The spring piece 310 is embedded in the groove 320 of the probe 100 body, so that the spring piece 310 is supported and fixed by the groove 320 along its entire length direction, preventing the spring piece 310 from being displaced or falling off due to vibration or impact during operation.

[0043] The groove 320 can provide additional mechanical support to make the spring piece 310 more stable and less likely to loosen, thereby ensuring the long-term reliability and stability of the elastic abutment assembly 300 .

[0044] It should be noted that the spring clip 310 is in the shape of a hairpin. The structure of the hairpin-shaped spring clip 310 makes it highly elastic, and it can quickly return to its original shape after being subjected to force, providing a stable elastic abutment force. After the probe 100 body is installed inside the bolt, the spring clip 310 can better adapt to the shape of the inner hole and be firmly fixed in the appropriate position.

[0045] The hairpin-shaped spring piece 310 can quickly return to its original shape after being subjected to force, thereby ensuring that the probe 100 can remain in a stable fixed state after being subjected to vibration or impact, and is not easy to loosen or shift.

[0046] In some embodiments, see Figure 3 and Figure 4 The ultrasonic detection head 410 includes a plurality of array elements 411, which are arranged in an array around the central axis of the probe body 100, so as to realize 360-degree all-round detection and cover the entire inner hole of the bolt. No matter where defects such as cracks, corrosion, and wear appear on the bolt, they can be effectively detected. The uniform coverage of the plurality of array elements 411 can avoid the detection blind spots that may be generated by a single detection head, and improve the comprehensiveness of the detection.

[0047] At the same time, multiple array elements 411 can transmit and receive ultrasonic waves from different angles, making the detection signals more diverse and rich. Multi-angle detection can more keenly capture tiny defects inside the bolt, improving the sensitivity and resolution of detection.

[0048] In some embodiments, see Figure 4 The ultrasonic probe head 410 further includes a screw-on component 412, which is specifically a connecting bolt. A through hole is formed at the end of the ultrasonic probe head 410, and the connecting bolt passes through the through hole and is threadedly connected to the probe body 100, thereby connecting the ultrasonic probe head 410 and the probe body 100 into one body. When the ultrasonic probe head 410 is damaged, the ultrasonic probe head 410 can be removed by using the connecting bolt for repair and replacement.

[0049] In some embodiments, see Figure 2 and Figure 4The ultrasonic detection head 410 also includes a data line 413. A connection hole is provided in the probe body 100. The data line 413 is inserted into the connection hole. One end of the data line 413 is electrically connected to the array element 411, and the other end of the data line 413 is connected to the computer. The data line 413 directly connects the array element 411 and the computer, and can realize fast and real-time transmission of detection data. In this way, the stress changes and defect information inside the bolt can be obtained in time, which is helpful for real-time monitoring and rapid response.

[0050] Wired connections have lower latency than wireless transmission, ensuring the real-time and accuracy of data and improving the response speed and efficiency of the overall detection system.

[0051] The data line 413 is passed through the connection hole of the probe 100 body and is protected by the probe 100 body, which can effectively shield external electromagnetic interference, ensure the accuracy and integrity of data transmission, and reduce signal attenuation and noise.

[0052] Workflow: gradually insert the probe 100 body into the inner hole of the bolt, press the spring piece 310 with your finger, so that the spring piece 310 retracts into the groove 320, and when the probe 100 body is completely inserted into the inner hole of the bolt, release the spring piece 310 with your finger, and the end of the spring piece 310 abuts against the inner wall of the bolt. Next, insert the adjustment key into the probe 100 body, and insert the end of the adjustment key into the clamping hole 212a of the permanent magnet 212. The adjustment key can be used to change the magnetic pole direction of the permanent magnet 212, so that the permanent magnet 212 is magnetically connected to the bolt to prevent the probe 100 body from falling off the bolt.

[0053] The above description is only a preferred specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be covered by the present invention.

Claims

1. A bolt stress detection device, characterized in that: include: A probe, the probe comprising a probe body for being inserted into the bolt; A magnetic attraction component, wherein the magnetic attraction component includes a magnetic attraction unit with variable magnetic force, wherein the magnetic attraction unit is arranged in the probe body, and the magnetic attraction unit can change the magnitude of its own magnetic force to control the magnitude of the magnetic attraction force on the bolt; An elastic abutment component, the elastic abutment component comprises a spring sheet embedded in the probe body, one end of the spring sheet is fixedly connected to the probe body, and the other end of the spring sheet elastically abuts against the bolt; An ultrasonic generating component, wherein the ultrasonic generating component comprises an ultrasonic detection head arranged at the end of the probe body, and the ultrasonic detection head can monitor the stress changes inside the bolt.

2. A bolt stress detection device according to claim 1, characterized in that: The magnetic attraction unit includes an adjustment hole body opened inside the probe body, a rotatable permanent magnet and a magnetic blocking plate. The permanent magnet is inserted into the adjustment hole body and is rotatably connected to the adjustment hole body. The two magnetic blocking plates are arranged opposite to each other and embedded in the probe body to divide the adjustment hole body into two parts.

3. A bolt stress detection device according to claim 2, characterized in that: The permanent magnet is provided with a clamping hole for external adjustment.

4. A bolt stress detection device according to claim 1, characterized in that: The magnetic attraction unit includes an electromagnet, and the electromagnet is arranged in the probe body.

5. A bolt stress detection device according to claim 1, characterized in that: The elastic abutment component further comprises a groove, which is arranged on the side wall of the probe body and extends along the length direction of the probe body, and the spring sheet is embedded in the groove.

6. A bolt stress detection device according to claim 5, characterized in that: The spring piece is in the shape of a hairpin.

7. A bolt stress detection device according to claim 1, characterized in that: The ultrasonic probe includes a plurality of array elements, and the plurality of array elements are arranged in an array around the central axis of the probe body.

8. A bolt stress detection device according to claim 7, characterized in that: The ultrasonic probe also includes a screw-on component, through which the ultrasonic probe is detachably connected to the probe body.

9. A bolt stress detection device according to claim 8, characterized in that: The ultrasonic detection head also includes a data line, which is passed through the probe body, and one end of the data line is electrically connected to the array element.

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