Bolt pretightening force ultrasonic probe

Abstract

The utility model belongs to the field of ultrasonic probes, and particularly relates to a bolt pretightening force ultrasonic probe. The ultrasonic probe comprises a probe shell, a connecting copper block, an ultrasonic transducer, an adsorption magnet, a first probe electrode and a second probe electrode, the probe shell comprises a connecting ring and a connecting plate, the connecting plate is provided with a coupling agent inflow hole, the coupling agent inflow hole is communicated with a connecting through hole, and the connecting through hole is communicated with the connecting copper block. The connecting copper block is fixed in the connecting through hole in an interference fit mode, an annular groove is formed in the outer side of the upper portion of the connecting copper block, one end of the coupling agent inflow hole is connected with the annular groove, a plurality of vertical grooves are formed in the outer side of the middle of the connecting copper block, one end of each vertical groove is communicated with the annular groove, and the other end of each vertical groove is communicated with the coupling agent inflow hole. And the other end leads to the coupling agent outlet. The device has the function of automatically spraying the couplant, is more accurate compared with a dry coupling measurement method, and is lower in cost and more convenient to implement compared with pre-embedded patch measurement.

Description

Technical Field

[0001] The utility model belongs to the field of ultrasonic probes, in particular to a bolt pre-tightening force ultrasonic probe. Background Art

[0002] There are various screw preload ultrasonic probes in the prior art, such as dry-coupled magnetic probes and pre-embedded strain gauge probes, which have inherent deficiencies or defects in actual use:

[0003] 1. Manual application is inefficient;

[0004] 2. Dry-coupled magnetic probes introduce large noise and low measurement accuracy. In real projects, it is inevitable that air is mixed in them, which affects the measurement results.

[0005] 3. To pre-embed the strain gauge probe, the bolts need to be patched in advance, and the patch bolts need to be installed in the bolt hole position to be tested. This method requires patching and calibration in the early stage of the test; during on-site installation, the patch bolts need to be installed in a specific position, which is costly and troublesome to implement;

[0006] 4. The temperature effect has a great influence on the expected force of the bolt. The traditional solution adopts independent measurement, and the time and measurement point are inconsistent. There is no integrated temperature sensor and magnetic sensor. It is impossible to monitor in real time whether the probe is adsorbed firmly, and it is impossible to perform temperature detection on the measured screw. Utility Model Content

[0007] The utility model aims to solve the above problems and provides a bolt pre-tightening force ultrasonic probe.

[0008] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0009] A bolt preload ultrasonic probe comprises a probe housing, a connecting copper block, an ultrasonic transducer, a first probe electrode and a second probe electrode. The probe housing comprises a connecting ring and a connecting plate. The connecting plate is fixed to the outer side of the connecting ring. The inner wall of the connecting ring forms a connecting through hole which passes through from top to bottom. A coupling agent inflow hole is provided on the connecting plate. The coupling agent inflow hole is connected with the connecting through hole. The connecting copper block is fixed in the connecting ring by interference fit. An annular groove is provided on the outer side of the upper part of the connecting copper block. One end of the coupling agent inflow hole is connected with the annular groove. A plurality of vertical grooves are provided on the outer side of the middle part of the connecting copper block. The upper ends of the plurality of vertical grooves are connected with the annular groove. The plurality of vertical grooves and the inner wall of the connecting ring form a plurality of coupling agent outflow holes. The ultrasonic transducer is fixed to the connecting copper block. The first probe electrode and the second probe electrode pass through the probe housing and the connecting copper block. The lower end of the first probe electrode contacts with the housing of the ultrasonic transducer. The lower end of the second probe electrode is fixedly connected with the center of the ultrasonic transducer.

[0010] Furthermore, it also includes an insulating cover, which is installed on the upper side of the probe housing. The first probe electrode and the second probe electrode pass through the insulating cover, the probe housing and the connecting copper block in sequence, and the second probe electrode is connected to the insulating cover by threads.

[0011] Furthermore, the lower side of the insulating cover has a protrusion, the connecting copper block has a through hole opened along the central axis, and the protrusion is installed in the through hole.

[0012] Furthermore, a plurality of embedding claws are provided at the lower part of the connecting copper block, an embedding chamber is formed between the plurality of embedding claws, and the ultrasonic transducer is fixed in the embedding chamber.

[0013] Furthermore, the number of the first probe electrodes is one or more.

[0014] Furthermore, it also includes a temperature sensor, which penetrates the probe housing and the insulating cover and is installed on the connecting plate.

[0015] Furthermore, it also includes an adsorption magnet and a magnetic sensor. The adsorption magnet is fixed to the outer side of the connecting ring by interference fit, and the magnetic sensor is installed on the lower side of the connecting plate.

[0016] Furthermore, it also includes a connecting sheet metal and a connecting spring, the first probe electrode passes through the connecting sheet metal, the insulating cover, the probe housing and the connecting copper block in sequence, and the connecting spring is installed on the upper end of the connecting sheet metal.

[0017] Compared with the prior art, the utility model has the following significant advantages: it has the function of automatically spraying coupling agent, which is more accurate than the dry coupling measurement method, and is lower in cost and more convenient to implement than the embedded patch measurement; it is equipped with a temperature sensor, which can collect temperature information in real time and compensate the measurement results; it is equipped with a magnetic sensor, which can monitor in real time whether the probe is adsorbed firmly and ensure the consistency of the adsorption pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A stereoscopic diagram of a bolt pre-tightening ultrasonic probe of the utility model;

[0019] Figure 2 A cross-sectional view of a bolt pre-tightening ultrasonic probe according to the utility model;

[0020] Figure 3 A three-dimensional diagram of the probe housing of the utility model;

[0021] Figure 4 A stereoscopic diagram of the utility model connecting copper blocks.

[0022] Explanation of the reference numerals: 1. connecting spring, 2. second probe electrode, 3. first probe electrode, 4. probe housing, 5. adsorption magnet, 6. temperature sensor, 7. magnetic sensitive sensor, 8. coupling agent inflow hole, 9. connecting sheet metal, 10. connecting copper block, 11. ultrasonic transducer, 12. coupling agent outflow hole, 13. insulating cover, 14. connecting ring, 15. connecting plate, 16. annular groove. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] The bolt pre-tightening force ultrasonic probe provided by the utility model can be installed on a wind power bolt inspection robot for use.

[0025] like Figures 1 to 4As shown, the bolt preload ultrasonic probe comprises an insulating cover 13, a probe housing 4, a connecting copper block 10, an ultrasonic transducer 11, an adsorption magnet 5, a first probe electrode 3 and a second probe electrode 2. The probe housing 4 comprises a connecting ring 14 and a connecting plate 15, the inner wall of the connecting ring 14 encloses a connecting through hole that passes through from top to bottom, the connecting plate 15 is fixed to the upper part of the outer side of the connecting ring 14, and the probe housing 4 is integrally formed. An annular groove 16 is provided on the outer side of the upper part of the connecting copper block 10, a plurality of vertical grooves are provided on the outer side of the middle part of the connecting copper block 10, a plurality of embedded claws are provided on the lower part of the connecting copper block 10, an embedded chamber is formed between the plurality of embedded claws, and a through hole that passes through from top to bottom is provided at the center of the connecting copper block 10. The insulating cover 13 is a plate-like structure as a whole, the lower side of the insulating cover 13 has a protrusion, and a connecting hole that passes through from top to bottom is provided at the protrusion position. The connecting copper block 10 is fixed in the connecting through hole of the connecting ring 14 by interference fit, and the upper side of the probe housing 4 is flush with the upper side of the connecting copper block 10. The insulating cover 13 is disposed on the upper side of the probe housing 4 and the connecting copper block 10 , and the protrusion is installed in the through hole of the connecting copper block 10 .

[0026] A coupling agent inflow hole 8 is opened on the connecting plate 15, and the coupling agent inflow hole 8 is connected to the connecting through hole. The coupling agent inflow hole 8 is connected to the annular groove 16. The upper end of each vertical groove is connected to the annular groove 16, and the lower end of each vertical groove extends between the embedded claws. Multiple vertical grooves and the inner wall of the connecting ring 14 form multiple coupling agent outflow holes 12.

[0027] The coupling agent flows into the bolt preload ultrasonic probe through the coupling agent inlet hole 8, flows into the coupling agent outlet hole 12 through the annular groove 16, and is sprayed onto the bolt to be measured for measurement, thereby realizing wet coupling measurement.

[0028] The ultrasonic transducer 11 is fixed in an embedding chamber inside an embedding claw connected to the copper block 10 by interference fit, and can emit and receive ultrasonic signals.

[0029] There are one or more first probe electrodes 3. In one embodiment, there are two first probe electrodes 3, which are respectively located on both sides of the through hole of the connecting copper block 10. The first probe electrode 3 and the second probe electrode 2 pass through the insulating cover 13, the probe housing 4 and the connecting copper block 10 in sequence, and the first probe electrode 3 is connected to the connecting copper block 10 by threads, and the second probe electrode 2 is connected to the insulating cover 13 by threads. The lower end of the first probe electrode 3 contacts the housing of the ultrasonic transducer 11, and the lower end of the second probe electrode 2 is fixedly connected to the center of the ultrasonic transducer 11.

[0030] The bolt preload ultrasonic probe is installed on the wind power bolt inspection robot through the connecting sheet metal 9 and the connecting spring 1. The connecting sheet metal 9 can be fixed on the insulating cover 13 through the first probe electrode 3. Two first probe electrodes 3 or fasteners such as bolts can be added to make the connecting sheet metal 9 more firmly fixed on the insulating cover 13. The shape of the connecting plate 15 can be adjusted according to actual installation requirements.

[0031] The bolt preload ultrasonic probe is provided with a temperature sensor 6, which is installed through the connecting sheet metal 9, the insulating cover 13 and the connecting plate 15. The temperature information is collected while measuring the screw, and the measurement result is temperature compensated to eliminate the influence of temperature on the measurement result. The temperature compensation can adopt the existing temperature compensation method.

[0032] The adsorption magnet 5 is fixed to the outer side of the connecting ring 14 by interference fit. The bolt preload ultrasonic probe is stably adsorbed on the bolt to be tested. A magnetic sensor 7 is installed on the lower side of the connecting plate 15, and the magnetic sensor 7 is located near the adsorption magnet 5. The magnetic force change can be monitored, so that the probe adsorption can be monitored in real time to determine whether it is adsorbed firmly, while ensuring the consistency of the adsorption pressure.

[0033] The above-mentioned embodiments only express one or several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A bolt preload ultrasonic probe, characterized in that: The ultrasonic transducer comprises a probe housing, a connecting copper block, an ultrasonic transducer, a first probe electrode and a second probe electrode, the probe housing comprising a connecting ring and a connecting plate, the connecting plate being fixed to the outer side of the connecting ring, the inner wall of the connecting ring forming a connecting through-hole running through the upper and lower parts, a coupling agent inflow hole being provided on the connecting plate, the coupling agent inflow hole being connected to the connecting through-hole, the connecting copper block being fixed in the connecting ring by an interference fit, an annular groove being provided on the outer side of the upper part of the connecting copper block, one end of the coupling agent inflow hole being connected to the annular groove, a plurality of vertical grooves being provided on the outer side of the middle part of the connecting copper block, the upper ends of the plurality of vertical grooves being connected to the annular groove, the plurality of vertical grooves forming a plurality of coupling agent outflow holes with the inner wall of the connecting ring, the ultrasonic transducer being fixed to the connecting copper block, the first probe electrode and the second probe electrode passing through the probe housing and the connecting copper block, the lower end of the first probe electrode being in contact with the housing of the ultrasonic transducer, and the lower end of the second probe electrode being fixedly connected to the center of the ultrasonic transducer.

2. The bolt preload ultrasonic probe according to claim 1, characterized in that: It also includes an insulating cover, which is installed on the upper side of the probe housing. The first probe electrode and the second probe electrode pass through the insulating cover, the probe housing and the connecting copper block in sequence. The second probe electrode is connected to the insulating cover through threads.

3. The bolt preload ultrasonic probe according to claim 2, characterized in that: The lower side of the insulating cover is provided with a protrusion, the connecting copper block is provided with a through hole along the central axis, and the protrusion is installed in the through hole.

4. The bolt preload ultrasonic probe according to claim 1, characterized in that: A plurality of embedding claws are provided at the lower part of the connecting copper block, an embedding chamber is formed between the plurality of embedding claws, and the ultrasonic transducer is fixed in the embedding chamber.

5. The bolt preload ultrasonic probe according to claim 1, characterized in that: There are one or more first probe electrodes.

6. The bolt preload ultrasonic probe according to claim 1, characterized in that: The probe further comprises a temperature sensor which penetrates the probe housing and the insulating cover and is mounted on the connecting plate.

7. The bolt preload ultrasonic probe according to claim 1, characterized in that: It also includes an adsorption magnet and a magnetic sensor. The adsorption magnet is fixed on the outer side of the connecting ring by interference fit, and the magnetic sensor is installed on the lower side of the connecting plate.

8. The bolt preload ultrasonic probe according to claim 2, characterized in that: It also includes a connecting sheet metal and a connecting spring. The first probe electrode passes through the connecting sheet metal, the insulating cover, the probe housing and the connecting copper block in sequence. The connecting spring is installed on the upper end of the connecting sheet metal.

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