Energy-saving ultrasonic detection method and water jacket
By designing a coupled water jacket for ultrasonic detection, using an Ω seal ring to contact the surface of the workpiece, the stable conduction of ultrasonic signals and water flow saving are achieved, and the stability and pollution of water spray-coupled ultrasonic detection on composite workpieces is solved. The problem has improved the detection effect and environmental protection.
Patent Information
- Application Number
- CN202210040380.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-01-14
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2042-01-14
AI Technical Summary
The existing water jet coupled ultrasonic detection is difficult to maintain jet stability in the motion state, and the detection effect of composite workpieces such as wind power blades is poor, and environmental impurities are easily contaminated, affecting the detection effect.
A coupled water jacket for ultrasonic detection is designed, which uses an Ω-shaped sealing ring to directly contact the surface of the workpiece, and transmits ultrasonic signals through the water flow in the water jacket. It adopts threaded connection and thread adjustment design to ensure stable water flow and small amounts of use, combined with benzene The flexibility and wear resistance of rubber and other materials reduce water leakage.
It realizes stable conduction of water flow in ultrasonic detection, reduces ultrasonic signal attenuation, saves water resources, improves the stability and environmental protection of detection, and is suitable for non-destructive testing of large composite workpieces.
Smart Images
Figure CN114295727B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of ultrasonic nondestructive testing, and belongs to an energy-saving ultrasonic testing method and a water jacket. The water jacket is in direct contact with a workpiece to be tested, and can keep the space between the ultrasonic probe and the workpiece to be tested full of stable coupling water, so that the ultrasonic signal can be stably conducted in the water jacket. The water jacket is particularly suitable for ultrasonic nondestructive testing of large composite workpieces such as wind turbine blades. Background Art
[0002] Ultrasonic testing is a commonly used nondestructive testing method. It has a wide detection range, high strength, and can accurately detect internal defects of workpieces. It can be used for nondestructive testing of large composite workpieces such as wind turbine blades. In order to ensure the stability of acoustic coupling in ultrasonic testing, water is often used as a coupling agent between the ultrasonic probe and the workpiece to be tested to transmit sound waves between the probe and the workpiece to be tested. There are two common coupling methods for phased array ultrasonic testing: water immersion and water spray coupling. Among them, the acoustic coupling stability of water immersion ultrasonic testing is higher, but the workpiece to be tested needs to be completely immersed in water, and it is not suitable for large workpieces such as wind turbine blades. The water spray coupling type has the advantages of convenience, speed, and avoiding long-term immersion of the workpiece. It is particularly suitable for ultrasonic nondestructive testing of large and complex workpieces.
[0003] The ultrasonic signal of water-jet coupled ultrasonic testing propagates along the coupled water column, and the flow state of the water column can easily affect the stability of the acoustic coupling. Many institutions at home and abroad have studied the structural optimization of the coupled nozzle to ensure that the nozzle jet is in a relatively stable state, but it is difficult to maintain the stability of the jet in a moving state, and it is easily affected by the external environment. In addition, the ultrasonic signal attenuation of composite materials such as glass fiber is large, and it is difficult to obtain ideal detection results when testing wind turbine blades, etc. At the same time, water-jet coupled ultrasonic testing requires continuous spraying of water columns. Although water resource consumption can be reduced by introducing a water circulation system, it is difficult to avoid environmental impurities from entering the circulation system, polluting the coupled water, and thus affecting the detection effect.
[0004] Therefore, the present invention designs a coupled water jacket, which utilizes the Ω-shaped sealing ring part of the lip of the water jacket to directly contact the surface of the workpiece to be tested, and traps the water flow between the water jacket and the surface of the workpiece to be tested, so that only a very small amount of water flows out from the contact surface between the water jacket and the workpiece during the detection process. Only a small amount of water is consumed to continuously measure the workpiece, thereby achieving the effect of energy saving and efficient testing. Summary of the invention
[0005] Aiming at the shortcomings of the existing ultrasonic testing technology, the present invention proposes a new type of water spray coupling testing method and designs a coupling water jacket for ultrasonic testing. When performing ultrasonic testing, the lip of the water jacket is in direct contact with the surface of the workpiece, and the ultrasonic signal is transmitted through the water flow in the water jacket. The water flow in the water jacket is stable, and the water consumption is low, which is energy-saving and environmentally friendly, and can meet the needs of ultrasonic non-destructive testing of various large workpieces such as wind turbine blades.
[0006] The technical solution adopted by the present invention is as follows:
[0007] A coupled water jacket for ultrasonic testing, the device comprises a coupled water jacket, a nozzle and a nozzle back cover, wherein the coupled water jacket, the nozzle and the nozzle back cover are connected via threads; an ultrasonic probe clamp is arranged inside the nozzle, and the ultrasonic probe can be installed inside the nozzle via the ultrasonic probe clamp; the back cover is provided with a wire outlet and a water inlet, and the water inlet is arranged above the back cover; the coupled water jacket is connected to the nozzle via a hard plastic connecting pipe at one end, and the Ω-shaped sealing ring part of the coupled water jacket will deform and fit the surface of the workpiece to be tested when subjected to a large axial pressure.
[0008] Furthermore, a water inlet cavity is arranged in the rear cover, a water outlet cavity is arranged in the nozzle, and a water jacket inner cavity is arranged in the coupling water jacket.
[0009] Furthermore, the signal emitting surface of the ultrasonic probe is opposite to the water outlet and is set to be a circle of the same shape. The cross-sectional diameter of the nozzle water outlet is slightly larger than that of the probe, which is about 1.5 times the diameter of the probe.
[0010] Furthermore, the coupling water jacket is installed outside the nozzle, and the inner diameter of the coupling water jacket is required to be larger than the inner diameter of the nozzle outlet.
[0011] Furthermore, the thread between the coupling water jacket and the nozzle is an adjustment thread and is arranged at a relatively long distance, so as to adjust the relative position between the coupling water jacket and the nozzle and change the extended length of the coupling water jacket.
[0012] Furthermore, a threaded hole is provided on the hard plastic connecting pipe portion of the coupling water jacket, and a cutting plane is provided on the nozzle, through which a screw can pass through the threaded hole to contact the cutting plane, thereby preventing the coupling water jacket from rotating and fixing the coupling water jacket.
[0013] Furthermore, the Ω-shaped sealing ring and the hard plastic connecting pipe are designed to be glued into an integrated whole.
[0014] Furthermore, the cross section of the Ω-shaped sealing ring is Ω-shaped, and is made of synthetic rubber materials such as styrene-butadiene rubber and butadiene rubber, and has certain flexibility and good wear resistance.
[0015] Furthermore, the interior of the Ω-shaped sealing ring is designed as a circular sealing ring water-filled cavity with a plurality of evenly distributed water cavity connecting holes for ensuring that the sealing ring water-filled cavity is connected with the inner cavity of the water jacket.
[0016] The beneficial effects of the present invention are as follows:
[0017] The coupling water jacket, nozzle and nozzle back cover of the present invention are connected by threads, which are easy to disassemble and replace, and the cutting plane of the nozzle does not reach the nozzle outlet. A gasket is arranged between the nozzle and the nozzle back cover, and the overall structure has good sealing performance; the water inlet of the present invention is arranged just above the inlet, which can make the water jacket cavity easier to be filled with water; the thread between the coupling water jacket and the nozzle of the present invention is an adjustment thread, and the setting distance is relatively long, which can be used to adjust the length of the coupling water jacket to be extended, so as to be suitable for various types of ultrasonic detection and better contact with the workpiece. The hard plastic connecting pipe part of the coupling water jacket is provided with a threaded hole, and the cutting plane is provided on the nozzle, which can be contacted with the cutting plane through the threaded hole by a fastening screw to prevent the coupling water jacket from rotating, and then fix the coupling water jacket; the cross section of the Ω-shaped sealing ring of the present invention is Ω-shaped, and it adopts synthetic rubber materials with certain flexibility and good wear resistance such as styrene-butadiene rubber and butadiene rubber, which itself has a certain supporting force, and the deformation direction is axial compression when in contact with the workpiece, so as to facilitate the water jacket to fit and seal with the surface of the workpiece to be detected. A circular sealing ring water-filling cavity is arranged inside the Ω-shaped sealing ring, and the sealing ring is easier to be filled with water, which can provide a certain deformation space for the lip-shaped sealing ring to fit with the workpiece. There are multiple evenly distributed water cavity connecting holes on the Ω-shaped sealing ring, which are used to ensure that the sealing ring water-filling cavity is connected with the inner cavity of the water jacket, and to ensure that the pressure of the sealing ring water-filling cavity and the inner cavity of the water jacket are the same, reducing the influence of the water pressure in the inner cavity of the water jacket on the deformation of the sealing ring, and improving the sealing performance of the water jacket; the present invention transmits the ultrasonic signal through the nozzle water outlet cavity and the water flow in the inner cavity of the water jacket, and the Ω-shaped sealing ring part of the water jacket is in direct contact with the workpiece. Only a small amount of water will flow out from the gap between the lip-shaped sealing ring and the workpiece during the detection movement. The water flow in the inner cavity of the water jacket is in a stable state of slow flow or even stillness, which can effectively reduce the attenuation of the ultrasonic signal during the coupling process. The overall solution consumes less water and is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is the overall structure diagram of the present invention.
[0019] Figure 2 It is a schematic diagram of an embodiment of the present invention.
[0020] Figure 3 It is the structural diagram of the nozzle sleeve of the present invention.
[0021] Figure 4 It is a structural diagram of the nozzle part of the present invention.
[0022] Figure 5 It is a schematic diagram of the application of the present invention.
[0023] Among them: 1. Coupling water jacket; 1.1. Hard plastic connecting pipe; 1.2. Ω-shaped sealing ring; 1.3. Sealing ring water filling chamber; 1.4. Water chamber connecting hole; 1.5. Threaded hole; 2. Nozzle; 2.1. Cutting plane; 3. Back cover; 4. Water inlet; 5. Wire outlet; 6. Water inlet chamber; 7. Gasket; 8. Probe wire outlet; 9. Ultrasonic probe; 10. Probe bracket; 11. Nozzle water outlet chamber; 12. Nozzle water outlet; 13. Fastening screw; 14. Water jacket inner cavity; 15. Water inlet pipe; 16. Connecting wire; 17. Robot arm; 18. Workpiece to be tested. DETAILED DESCRIPTION
[0024] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.
[0025] like Figure 1 and Figure 2 In the embodiment shown, it mainly includes a coupling water jacket 1 , a nozzle 2 and a rear cover 3 . The coupling water jacket 1 is connected to the water outlet end of the nozzle 2 , and the bottom of the nozzle 2 is connected to the rear cover 3 .
[0026] like Figure 1 and Figure 2 In the illustrated embodiment, a water inlet chamber 6 is provided between the rear cover 3 and the nozzle 2, a nozzle water outlet chamber 11 is provided in the nozzle 2, a water jacket inner chamber 14 is provided in the coupling water jacket 1, and the nozzle water inlet 4 is provided at the upper end of the bottom of the rear cover 3, which can ensure that the water inlet chamber 6, the nozzle water outlet chamber 11 and the water jacket inner chamber 14 are more easily filled with water. The water inlet 4 and the water outlet 12 are in the same direction, which can also increase the stability of the flow inside the nozzle.
[0027] like Figure 2 In the illustrated embodiment, a probe holder 10 is disposed in the nozzle 2 . The probe holder 10 is provided with a slot. The nozzle 2 is inserted into the slot to prevent the holder from rotating. The ultrasonic probe 9 is fixed in the nozzle 2 through the probe holder 10 .
[0028] like Figure 2 In the embodiment shown, the coupling water jacket 1 is connected to the nozzle 2 by threads, and the water jacket 1 can be disassembled, assembled and replaced in practical applications. The nozzle 2 and the back cover 3 are connected by threads, which is convenient for installing and replacing the ultrasonic probe 9. The nozzle cutting plane 2.1 does not reach the outlet of the nozzle 2, and a gasket is provided between the nozzle and the nozzle back cover to improve the sealing of the overall structure.
[0029] like Figure 2 In the embodiment shown, the coupling water jacket is installed outside the nozzle, and the inner diameter of the coupling water jacket is required to be larger than the inner diameter of the nozzle outlet, so as to ensure that when the water jacket is deformed, the coupling channel range is sufficient and ultrasonic feedback is performed normally.
[0030] like Figure 2In the illustrated embodiment, the tail end of the ultrasonic probe 9 is connected to the external monitoring part through the probe wire outlet 8 and the wire outlet 5 is provided at the center of the rear cover 3 .
[0031] like Figure 2 and Figure 3 In the illustrated embodiment, the water jacket 1 comprises a hard plastic connecting pipe 1.1 and an Ω-shaped sealing ring 1.2, and the hard plastic connecting pipe 1.1 and the Ω-shaped sealing ring 1.2 are designed to be glued together.
[0032] like Figure 2 and Figure 3 In the illustrated embodiment, the Ω-shaped sealing ring 1.2 has an Ω-shaped cross section and is made of a synthetic rubber material such as styrene-butadiene rubber and butadiene rubber which has certain flexibility and good wear resistance. When in contact with a workpiece, the deformation direction is axial compression, which facilitates the sealing of the water jacket and the surface of the workpiece being inspected.
[0033] like Figure 2 and Figure 3 In the embodiment shown, a circular sealing ring water-filling chamber 1.3 is provided inside the Ω-shaped sealing ring 1.2, which is easy to be filled with water and provides a certain deformation space for the sealing ring. There are multiple evenly distributed water chamber connecting holes on the Ω-shaped sealing ring 1.2, which are used to ensure that the pressure of the sealing ring water-filling chamber is the same as that of the water jacket inner chamber 14, thereby reducing the influence of the water pressure change of the water jacket inner chamber 14 on the deformation of the Ω-shaped sealing ring 1.2.
[0034] like Figure 3 and Figure 4 In the embodiment shown, the thread between the coupling water jacket 1 and the nozzle 2 is an adjustment thread and is arranged at a relatively long distance, which can be used to adjust the extension length of the coupling water jacket 1. The coupling water jacket hard plastic connecting pipe 1.1 is provided with a threaded hole, and the nozzle 2 is provided with a cutting plane 2.1, which can be pressed and contacted with the cutting plane 2.1 by a fastening screw 13 passing through the threaded hole 1.5 to prevent the coupling water jacket 1 from rotating, thereby fixing the coupling water jacket 1.
[0035] like Figure 3 and Figure 5 In the illustrated embodiment, the Ω-shaped sealing ring 1.2 partially contacts the surface of the workpiece 18 and is compressed, which will cause a small deformation to adapt to the close sealing of various types of workpieces 18.
[0036] like Figure 2 He Ru Figure 5 In the embodiment shown, when the detection movement is performed, water flows in from the water inlet 4, gradually filling the water inlet chamber 6, the water outlet chamber 11 and the inner chamber 14 of the water jacket, and the lip of the coupling water jacket 1 is squeezed and contacted with the workpiece to be detected through the mechanical arm 17. During the detection process, a small amount of water will flow out from the contact gap between the Ω-shaped sealing ring 1.2 and the workpiece to be detected 18, and the water inlet pipe 15 continuously replenishes water into the water jacket to ensure that the coupling water jacket is always full of water.
[0037] The working principle of the present invention is: when in use, the inside of the water jacket is filled with water flow, and the Ω-shaped sealing ring 1.2 fits with the surface of the workpiece to be detected to reduce the outflow of water flow. The water flow required for ultrasonic detection coupling enters the water inlet chamber 6 from the water inlet 4 of the rear cover 3, and the water flow converges and flows into the water jacket inner chamber 14 from the water outlet 12 through the water outlet chamber 11. The water inlet 4 is arranged at the upper end of the rear cover. The water flow converges in the water inlet chamber 6, the water outlet chamber 11 and the water jacket inner chamber 14 until it is full. Part of the water flow will flow out from the gap between the Ω-shaped sealing ring 1.2 and the surface of the workpiece to be detected. At this time, the water flow in the water outlet chamber 11 and the water jacket inner chamber 14 maintains a stable and slow flow state. Before application, the relative position between the coupling water jacket 1 and the nozzle 2 can be adjusted and fixed by tightening screws, extending or shortening the distance of the coupling water jacket to better contact with the workpiece 18 to be detected. In the application, the Ω-shaped sealing ring 1.2 is partially compressed and deformed to a certain extent, and fits with the surface of the workpiece to be detected. The Ω-shaped sealing ring 1.2 is designed with a circular sealing ring water-filling chamber 1.3, which is easier to fill with water and provides a certain deformation space for deformation with the workpiece. The evenly distributed water chamber connection holes can ensure that the sealing ring water-filling chamber 1.3 is connected with the water jacket inner chamber 14, reducing the influence of the water pressure change of the water jacket inner chamber 14 on the surface of the Ω-shaped sealing ring 1.2 and the workpiece 18.
[0038] The water flow in each water cavity of the water jacket of the present invention is full, and the water flow leaking through the gap between the Ω-shaped sealing ring and the surface of the workpiece is small, which can provide a good ultrasonic signal coupling channel for phased array ultrasonic nondestructive testing. After the ultrasonic signal reaches the surface of the workpiece through the water flow in the water jacket, it is reflected back to the ultrasonic probe along the water flow, which is less affected by the flow state of the water flow, can reduce external signal interference, has less sound wave loss, can improve the acoustic coupling stability of the phased array ultrasonic coupling, and has relatively low site requirements for energy saving and environmental protection, meeting the ultrasonic coupling requirements in most cases.
[0039] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.
Claims
1. An energy-saving ultrasonic testing water jacket, characterized in that: The method of adding a water jacket is adopted to ensure the stability of the water flow between the ultrasonic probe and the workpiece to be detected; the coupling water jacket (1), the nozzle (2) and the nozzle back cover (3); the coupling water jacket (1), the nozzle (2) and the nozzle back cover (3) are coaxially arranged in sequence and connected by threads; a probe bracket (10) is arranged inside the nozzle (2), and the ultrasonic probe (9) can be installed inside the nozzle (2) through the probe bracket (10); the back cover (3) is provided with a wire outlet (5) and a water inlet (4); the position of the coupling water jacket (1) can be adjusted, a water jacket inner cavity (14) is provided inside the coupling water jacket (1), and an Ω-shaped sealing ring (14) is provided on the coupling water jacket (1). .2), the cross section of the Ω-shaped sealing ring (1.2) is Ω-shaped; the Ω-shaped sealing ring (1.2) is located at one end of the nozzle (2) away from the nozzle rear cover (3) and is arranged corresponding to the water outlet (12) of the nozzle (2); a sealing ring water filling chamber (1.3) is arranged inside the Ω-shaped sealing ring (1.2); a water chamber connecting hole (1.4) is provided on the Ω-shaped sealing ring (1.2) for ensuring that the sealing ring water filling chamber (1.3) is connected to the inner chamber of the water jacket (14) and for ensuring that the pressure of the sealing ring water filling chamber (1.3) and the inner chamber of the water jacket (14) are the same; when subjected to axial pressure, a portion of the Ω-shaped sealing ring (1.2) will deform and fit the surface of the workpiece (18) to be detected.
2. An energy-saving ultrasonic testing water jacket as claimed in claim 1, characterized in that: A water inlet chamber (6) is provided between the rear cover (3) and the nozzle (2), a nozzle water outlet chamber (11) is provided in the nozzle (2), and a water inlet (4) is provided at the upper end of the bottom of the rear cover (3), which can ensure that the water inlet chamber (6), the nozzle water outlet chamber (11) and the inner chamber (14) of the water jacket are filled with water more quickly. The water inlet (4) and the nozzle water outlet (12) are in the same direction, which can also increase the stability of the flow inside the nozzle (2).
3. The energy-saving ultrasonic testing water jacket according to claim 1, characterized in that: A probe holder (10) is arranged in the nozzle (2), and a clamping slot is arranged on the probe holder (10). By clamping the nozzle (2) through the clamping slot, the probe holder (10) can be prevented from rotating and displacing. The ultrasonic probe (9) is fixed in the nozzle (2) through the probe holder (10).
4. The energy-saving ultrasonic testing water jacket according to claim 1, characterized in that: The coupling water jacket (1) is installed outside the nozzle (2), and the inner diameter of the coupling water jacket (1) is required to be larger than the inner diameter of the nozzle water outlet (12) so as to reduce the influence of partial deformation of the Ω-shaped sealing ring (1.2) on ultrasonic coupling.
5. The energy-saving ultrasonic testing water jacket according to claim 4, characterized in that: The coupling water jacket (1) is connected to the nozzle (2) via an adjusting thread, and the position of the coupling water jacket (1) can be adjusted by screwing the coupling water jacket (1), thereby adjusting the extended length of the coupling water jacket (1), so as to be suitable for the detection of various types of workpieces.
6. The energy-saving ultrasonic testing water jacket according to claim 1, characterized in that: The coupling water jacket (1) includes a threaded hole (1.5), and the nozzle (2) includes a cutting plane (2.1). After adjusting the position of the coupling water jacket (1), the fastening screw (13) can be screwed in to contact the cutting plane (2.1) to prevent the coupling water jacket (1) from rotating, thereby fixing the coupling water jacket (1).
7. The energy-saving ultrasonic testing water jacket according to claim 1, characterized in that: The Ω-shaped sealing ring (1.2) has a certain supporting capacity and its deformation direction is axial compression when in contact with a workpiece, making it easier to fit with the surface of the workpiece; the Ω-shaped sealing ring (1.2) is made of styrene-butadiene rubber and butadiene rubber synthetic rubber materials, and has certain flexibility and good wear resistance; a circular sealing ring water-filling chamber (1.3) is arranged inside the Ω-shaped sealing ring (1.2), and the circular sealing ring water-filling chamber (1.3) is designed so that the inside of the Ω-shaped sealing ring (1.2) is easy to be filled with water, and a certain deformation space can be provided for the Ω-shaped sealing ring (1.2) to fit with the workpiece (18) to be detected; and a plurality of evenly distributed water chamber connecting holes (1.4) are provided on the Ω-shaped sealing ring (1.2), so as to reduce the influence of the water pressure in the inner chamber of the water jacket on the deformation of the Ω-shaped sealing ring (1.2).