Ultrasonic transducer

Abstract

The embodiment of the invention provides an ultrasonic transducer, and belongs to the field of ultrasonic equipment. The ultrasonic transducer comprises an acoustic wedge positioning frame which is provided with a frame bottom wall and a frame side wall, a mounting cavity is defined by the frame bottom wall and the frame side wall, and the frame bottom wall is provided with an opening; the acoustic wedge is arranged in the mounting cavity and extends into the opening; the ultrasonic generator is arranged on the side, away from the opening, of the acoustic wedge; the backing is arranged on the side, away from the acoustic wedge, of the ultrasonic generator; and the generator pressing piece is connected with the frame side wall, and the generator pressing piece can press the ultrasonic generator on the acoustic wedge through the backing and can also apply a pressing force to the wall surface around the opening in the frame bottom wall to the acoustic wedge. According to the ultrasonic transducer provided by the embodiment of the invention, the acoustic wedge is not easy to deform and break in a high-temperature environment, so that the applicability of the ultrasonic transducer in the high-temperature environment can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ultrasonic devices, in particular to an ultrasonic transducer. BACKGROUND

[0002] The ultrasonic transducer can measure fluid flow based on ultrasonic propagation characteristics, and has wide application in industrial automation, energy monitoring and other fields.

[0003] At present, the working temperature of the common ultrasonic transducer on the market is generally not more than 200℃. The ultrasonic transducer includes an acoustic wedge, a piezoelectric ceramic wafer arranged on the surface of the acoustic wedge through an adhesive or a coupling agent, and a pressing structure mounted on the acoustic wedge. The pressing structure presses the piezoelectric ceramic wafer against the acoustic wedge. However, when the working temperature exceeds 280℃, thermal stress concentration is easily generated between the piezoelectric ceramic wafer and the acoustic wedge due to the installation of the pressing structure on the acoustic wedge. Under the action of the pressing force, the acoustic wedge is easily deformed or broken, and even the piezoelectric ceramic wafer is damaged. SUMMARY

[0004] Therefore, the purpose of the present application is to provide an ultrasonic transducer which can prevent the acoustic wedge from being deformed or damaged in a high-temperature environment, and improve the applicability of the ultrasonic transducer in a high-temperature environment.

[0005] An aspect of the present application provides an ultrasonic transducer, comprising: an acoustic wedge positioning frame having a frame bottom wall and a frame side wall, the frame bottom wall and the frame side wall surrounding an installation cavity, the frame bottom wall having an opening; an acoustic wedge arranged in the installation cavity and extending into the opening; an ultrasonic generator arranged on one side of the acoustic wedge away from the opening; a backing arranged on one side of the ultrasonic generator away from the acoustic wedge; a generator pressing member connected to the frame side wall, the generator pressing member being capable of pressing the ultrasonic generator against the acoustic wedge through the backing, and being capable of applying a force to the acoustic wedge towards the wall surface around the opening of the frame bottom wall.

[0006] Further, in some embodiments, the generator pressing member comprises a connecting portion and an elastic portion, the connecting portion being connected to the frame side wall, and the elastic portion being located between the connecting portion and the backing; wherein the connecting portion is a hard connecting plate, or the connecting portion and the elastic portion are integrally formed.

[0007] Further, in some embodiments, the generator pressing member further comprises a guide member cooperating with the elastic portion, for limiting the compression deformation of the elastic portion along the extension direction of the guide member in the process of extruding the ultrasonic generator.

[0008] Further, in some embodiments, the acoustic wedge is a conductive acoustic wedge, and the ultrasonic generator is directly attached to the surface of the acoustic wedge; or the ultrasonic generator is attached to the surface of the acoustic wedge through a coupling electrode.

[0009] Furthermore, in some embodiments, the ultrasonic transducer further includes: an acoustic wedge pressing member connected to the side wall of the frame and pressing the acoustic wedge to press the wedge against the wall surface around the opening.

[0010] Furthermore, in some embodiments, the acoustic wedge includes an acoustic wedge body and a boss protruding from the acoustic wedge body toward the bottom wall of the frame, and the boss extends into the opening and fits in with the opening.

[0011] Furthermore, in some embodiments, a portion of the frame sidewall is in contact with an outer sidewall of the acoustic wedge.

[0012] Furthermore, in some embodiments, a recessed groove is provided at the edge of the opening on the outer wall of the frame bottom wall, and the recessed groove is communicated with the opening and extends toward the periphery of the opening.

[0013] Furthermore, in some embodiments, the sound wedge is a wedge-shaped block, the top of the sound wedge has a mounting slope, and the ultrasonic generator is arranged on the mounting slope; the frame side walls are distributed on both sides of the width direction of the sound wedge, and the top surface of the frame side wall has a connecting slope, which is parallel to the mounting slope, and the two ends of the generator clamping part are connected to the mounting slope.

[0014] Furthermore, in some embodiments, the top of the acoustic wedge also has a mounting plane adjacent to the mounting bevel, and the top of the frame side wall also has a transition surface and a connecting plane, the transition surface is located between the connecting bevel and the connecting plane, and the connecting plane is parallel to the mounting plane; the ultrasonic transducer also includes an acoustic wedge pressing piece, both ends of the acoustic wedge pressing piece are connected to the connecting plane and squeeze the mounting plane.

[0015] Furthermore, in some embodiments, both ends of the generator pressing member are connected to the mounting inclined surface via a first threaded member; and / or both ends of the acoustic wedge pressing member are connected to the connecting plane via a second threaded member.

[0016] Furthermore, in some embodiments, the sound wedge positioning frame further includes a connecting rib, which connects the two frame side walls from one side in the length direction of the sound wedge.

[0017] Furthermore, in some embodiments, the sound wedge is square, the frame side wall is cylindrical and surrounds the sound wedge, the upper inner wall of the frame side wall expands outward to form a connecting platform on the inner side, and the generator clamping part is connected to the connecting platform.

[0018] Furthermore, in some embodiments, the generator clamping member includes a connecting portion and an elastic portion, the connecting portion is connected to the side wall of the frame, and the elastic portion is located between the connecting portion and the backing; wherein the elastic portion is a spring or a rubber member, and / or the number of the elastic portion is at least one.

[0019] Furthermore, in some embodiments, the frame sidewall is provided with at least one hole penetrating through the thickness direction of the frame sidewall.

[0020] Furthermore, in some embodiments, the ultrasonic transducer also includes: a shell, the bottom of the shell has an opening, the sound wedge positioning frame is arranged inside the shell, the sound wedge is exposed through the opening, a cable connector is provided on the shell, the ultrasonic generator is connected to an electrode, and the electrode extends from the top of the installation cavity to the installation cavity and is electrically connected to the cable connector.

[0021] According to the ultrasonic transducer provided by the embodiment of the present invention, the acoustic wedge positioning frame and the acoustic wedge are designed to be separated, and the generator pressing member is installed on the acoustic wedge positioning frame to squeeze the acoustic wedge. Compared with the related art in which the pressing structure of the ultrasonic generator is directly connected to the acoustic wedge and squeezes the ultrasonic generator, the acoustic wedge is not easily deformed or broken in a high-temperature environment, which can improve the applicability of the ultrasonic transducer in a high-temperature environment.

[0022] Additional aspects and / or advantages of the present general inventive concept will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present general inventive concept. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects and features of the present invention will become more apparent through the following description of the embodiments in conjunction with the accompanying drawings, in which: Figure 1 A schematic diagram showing a partial structure of an ultrasonic transducer according to a first embodiment of the present application is shown; Figure 2 A schematic structural diagram of an acoustic wedge according to a first embodiment of the present application is shown; Figure 3 It shows a schematic structural diagram of the sound wedge positioning frame of the first embodiment of the present application; Figure 4 A partial side view schematic diagram of an ultrasonic transducer according to a first embodiment of the present application is shown; Figure 5 A partial top view schematically shows the ultrasonic transducer of the first embodiment of the present application; Figure 6 Shown Figure 5 Schematic cross-sectional view in the AA direction; Figure 7 Shown Figure 6 A local enlarged schematic diagram of point I in the middle; Figure 8 A schematic side view of an ultrasonic transducer according to a first embodiment of the present application is shown; Figure 9 FIG2 shows a partial top view of an ultrasonic transducer according to a second embodiment of the present application; Figure 10 Shown Figure 9 Schematic cross-sectional view in the middle BB direction; Figure 11 A structural schematic diagram of an acoustic wedge of a second embodiment of the present application is shown; Figure 12 A structural schematic diagram of an acoustic wedge positioning frame of a second embodiment of the present application is shown; Figure 13 A structural schematic diagram of an ultrasonic transducer of a second embodiment of the present application is shown; Figure 14 A partial structural schematic diagram of an ultrasonic transducer of a third embodiment of the present application is shown.

[0024] Figures 1 to 14 BRIEF DESCRIPTION OF THE DRAWINGS 100 acoustic wedge positioning frame; 110 frame bottom wall; 111 opening; 112 sink groove; 120 frame side wall; 121 connecting slope; 122 transition surface; 123 connecting plane; 124 connecting platform; 125 first mounting hole; 126 second mounting hole; 127 hole; 130 connecting rib; 140 first threaded member; 150 second threaded member; 200 acoustic wedge; 210 acoustic wedge main body; 211 mounting slope; 212 mounting plane; 220 boss; 300 ultrasonic generator; 310 electrode; 400 backing; 500 generator pressing member; 510 connecting portion; 520 elastic portion; 530 guide member; 600 acoustic wedge pressing member; 700 housing; 710 cable joint. DETAILED DESCRIPTION

[0025] The following detailed description is provided to help the reader obtain a thorough understanding of the methods, devices, and / or systems described herein. However, the various changes, modifications, and equivalents thereof will be clear to those skilled in the art after understanding the disclosure of the present application. For example, the order of the operations described herein is merely an example, and is not limited to those set forth herein, but can be changed as will be clear to those skilled in the art after understanding the disclosure of the present application, except for operations that must occur in a specific order. In addition, the description of features known in the art can be omitted for the sake of clarity and conciseness.

[0026] The features described herein can be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided so as to merely show some of the many possible ways of implementing the methods, devices, and / or systems described herein, which will be clear to those skilled in the art after understanding the disclosure of the present application.

[0027] As used herein, the term "and / or" includes any one of the associated listed items, as well as any combination of any two or more of the associated listed items.

[0028] Although terms such as "first", "second", and "third" can be used herein to describe various components, assemblies, regions, layers or sections, these components, assemblies, regions, layers or sections should not be limited by these terms. Instead, these terms are only used to distinguish one component, assembly, region, layer or section from another component, assembly, region, layer or section. Thus, a component, assembly, region, layer or section referred to as the first component, the first assembly, the first region, the first layer or the first section in the examples described herein can also be referred to as the second component, the second assembly, the second region, the second layer or the second section without departing from the teachings of the examples.

[0029] In the description, when an element such as a layer, a region, or a substrate is referred to as "on" another element, "connected to" or "coupled to" another element, it can be "directly on" the other element, "directly connected to" or "directly coupled to" the other element, or one or more other elements can be interposed therebetween. In contrast, when an element is referred to as being "directly on" another element, "directly connected to" or "directly coupled to" another element, there are no other elements interposed therebetween.

[0030] The terms used herein are only used to describe various examples and not to limit the disclosure. The singular form also intends to include the plural form unless the context clearly indicates otherwise. The terms "comprise", "include" and "have" indicate the presence of the stated feature, number, operation, component, element, and / or combination thereof, but do not exclude the presence or addition of one or more other features, numbers, operations, components, elements, and / or combinations thereof. The term "plurality" represents any number of two or more.

[0031] The terms "above", "below", "top", "bottom", and the like in the present application are defined with reference to the orientation in the drawings.

[0032] Unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs after the present disclosure is understood. Unless explicitly defined herein, terms such as those defined in a general dictionary should be interpreted as having the same meaning as their meanings in the context of the relevant art and the present disclosure, and should not be interpreted ideally or overly formally.

[0033] The following will be described in conjunction with Figures 1 to 14The ultrasonic transducer provided in an embodiment of the present invention is described. The ultrasonic transducer can be mounted on the outer wall of a pipe to detect the flow rate of liquid within the pipe, or it can be mounted in other locations or used for other purposes. The following description uses the ultrasonic transducer detecting the flow rate of liquid within a pipe as an example.

[0034] like Figures 1 to 3 、 Figures 9 to 12 As shown, an embodiment of a first aspect of the present invention provides an ultrasonic transducer, including an acoustic wedge positioning frame 100 , an acoustic wedge 200 , an ultrasonic generator 300 , a backing 400 and a generator pressing member 500 .

[0035] Acoustic wedge positioning frame 100 has a bottom wall 110 and side walls 120. These walls form a mounting cavity. Bottom wall 110 has an opening 111. Acoustic wedge 200 is positioned within the mounting cavity and extends into opening 111. This facilitates coupling of acoustic wedge 200 with the outer wall of a pipe, thereby detecting the flow rate of liquid within the pipe.

[0036] The ultrasonic generator 300 is disposed on the side of the acoustic wedge 200 facing away from the outlet 111, and the backing 400 is disposed on the side of the ultrasonic generator 300 facing away from the acoustic wedge 200. This facilitates the transmission of the ultrasonic waves generated by the ultrasonic generator 300 to the pipeline through the acoustic wedge 200.

[0037] The generator pressing member 500 is connected to the frame side wall 120. The generator pressing member 500 can press the ultrasonic generator 300 against the acoustic wedge 200 through the backing 400, and can also apply a force to the acoustic wedge 200 to press the wall surface around the opening 111 on the frame bottom wall 110.

[0038] In existing technology, the piezoelectric ceramic's compression structure is directly connected to the acoustic wedge and compresses the piezoelectric ceramic, forcing it to adhere to the wedge. Due to the significant difference in thermal expansion coefficients between the piezoelectric ceramic and the acoustic wedge, when the operating temperature is very high, the difference in thermal expansion and deformation between the piezoelectric ceramic and the acoustic wedge is significant, and the compression structure fixed to the acoustic wedge will also shift accordingly. This difference in expansion can cause a localized stress surge at the interface between the piezoelectric ceramic and the acoustic wedge, resulting in thermal stress concentration. Under the pressure of the compression structure, the acoustic wedge can easily deform or break, and even damage the piezoelectric ceramic.

[0039] In this embodiment, the acoustic wedge positioning frame 100 and the acoustic wedge 200 are designed to be separated, and the generator pressing member 500 is installed on the acoustic wedge positioning frame 100 to squeeze the acoustic wedge 200. The generator pressing member 500 will not be affected or is almost not affected by the thermal expansion of the acoustic wedge 200, which can effectively prevent thermal stress concentration from occurring at the interface connecting the ultrasonic generator 300 and the acoustic wedge 200. This can prevent the acoustic wedge 200 from deforming or breaking in a high-temperature environment, and avoid damage to the ultrasonic generator 300, which is conducive to the stable operation of the ultrasonic transducer in a high-temperature environment.

[0040] Moreover, in addition to squeezing the ultrasonic generator 300 through the backing 400 , the generator pressing member 500 can also indirectly apply a pressing force to the wall surface around the opening 111 on the bottom wall 110 of the frame to the acoustic wedge 200 , which is beneficial to improving the installation stability of the acoustic wedge 200 .

[0041] It should be noted that in this embodiment, the generator pressing member 500 is connected to the frame sidewall 120, which can be directly or indirectly connected. Furthermore, in this application, the generator pressing member 500 can apply a force to the acoustic wedge 200 to compress the wall surfaces surrounding the opening 111 on the frame bottom wall 110. It is assumed that the size of the opening 111 is smaller than the size of the frame bottom wall 110, and the frame bottom wall 110 is still left around the opening 111 to facilitate the positioning of the acoustic wedge 200. Furthermore, the indirect pressing force applied by the generator pressing member 500 to the acoustic wedge 200 can be large or small. The fixation of the acoustic wedge 200 can rely primarily on the compression of the generator pressing member 500, or the compression of the generator pressing member 500 can only play an auxiliary role. This does not mean that the acoustic wedge 200 is fixed only by the compression of the generator pressing member 500.

[0042] Further, if Figure 6 and Figure 10 As shown, the generator pressing member 500 may include a connecting portion 510 and an elastic portion 520 , wherein the connecting portion 510 is connected to the frame side wall 120 , and the elastic portion 520 is located between the connecting portion 510 and the backing 400 .

[0043] Here, the generator pressing member 500 includes an elastic portion 520. This allows the elastic portion 520 to be pressed against the ultrasonic generator 300 without damaging the ultrasonic generator 300, thereby improving the installation stability of the ultrasonic generator 300. Furthermore, in high-temperature environments, the elastic portion 520 can absorb stress generated by temperature changes, further preventing deformation or breakage of the acoustic wedge 200 in such environments.

[0044] The connecting portion 510 can be a hard connecting plate, which is convenient for firmly connecting with the frame side wall 120 and fully pressing down the elastic portion 520. At this time, the connecting portion 510 and the elastic portion 520 are split designs, and the two can be directly attached, adhered together, or fixed together by other means.

[0045] The elastic part 520 can be a spring, such as a disc spring, which has good elasticity, good high temperature resistance and long service life. Of course, the elastic part 520 can also be a silicone member, etc., which will not be listed in detail here.

[0046] The number of elastic parts 520 can be one or at least two. When the number of elastic parts 520 is at least two, the at least two elastic parts 520 can be distributed at intervals along the acoustic wedge 200. In this case, the number of connecting parts 510 can be one, and the connecting part 510 can also be distributed one-to-one with the elastic parts 520, while pressing down the at least two elastic parts 520.

[0047] Of course, the connecting part 510 can also be integrally formed with the elastic part 520. Both are made of the same material, so that the generator pressing part 500 is made of an elastic material as a whole or has elasticity, which is simple in structure, reduces parts, and is convenient to assemble. For example, the generator pressing part 500 can be a high-temperature-resistant plastic part, a part of which is shaped as a connecting part 510 to connect with the acoustic wedge positioning frame 100, and another part is shaped as a spring to generate elastic force.

[0048] Further, as shown in Figure 6 and Figure 10 , the generator pressing part 500 can also include a guide part 530, which cooperates with the elastic part 520 and is used to limit the compression deformation of the elastic part 520 in the extension direction of the guide part during the extrusion of the ultrasonic generator 300. In this way, the elastic part 520 can be prevented from being skewed and displaced during compression, and the generator pressing part 500 can be ensured to stably extrude the ultrasonic generator 300.

[0049] As an example, as shown in Figure 6 and Figure 10 , the guide part 530 can be a guide rod, and the connecting part 510 and the elastic part 520 are both provided with through holes, and the guide rod extends into the through holes of the connecting part 510 and the elastic part 520. Of course, the guide part 530 can also be a guide sleeve, and the elastic part 520 extends into the guide sleeve and is limited by the side wall of the guide sleeve.

[0050] Further, as shown in Figure 1 and Figure 5 , the generator pressing part 500 can be connected with the frame side wall 120 by a first threaded part 140, such as a screw or a bolt, so that the generator pressing part 500 can press down the backing 400 during the process of screwing the first threaded part 140. Of course, the generator pressing part 500 can also be connected with the frame side wall 120 by a latch, a buckle or other structures, which will not be listed in detail here.

[0051] Further, in some embodiments, as shown in Figure 6 and Figure 10 , the acoustic wedge 200 is a conductive acoustic wedge, and the ultrasonic generator 300 is directly attached to the surface of the acoustic wedge 200; or the ultrasonic generator 300 is attached to the surface of the acoustic wedge 200 through a coupling electrode.

[0052] In the prior art, piezoelectric ceramic wafers are usually bonded to the acoustic wedge 200 by adhesive or pressed to the acoustic wedge 200 by coupling agent, but the durability of the adhesive or coupling agent under high temperature environment is insufficient, which affects the stable operation of the ultrasonic transducer under high temperature environment. In the embodiment, the ultrasonic generator 300 is directly attached to the surface of the acoustic wedge 200, or attached to the surface of the acoustic wedge 200 through the coupling electrode, which eliminates the adhesive or coupling agent and avoids the above problems. At the same time, the generator pressing member 500 is used to press the ultrasonic generator 300, which can ensure the installation stability of the ultrasonic generator 300.

[0053] As an example, the coupling electrode can be an electrode layer coated on the surface of the ultrasonic generator 300, or a metal film covering the surface of the ultrasonic generator 300, or a relatively soft metal sheet, which facilitates the full attachment of the ultrasonic generator 300 and the acoustic wedge 200.

[0054] Of course, the side of the ultrasonic generator 300 facing the backing 400 can also be provided with an electrode 310. When the acoustic wedge 200 is a conductive member, the electrode 310 and the acoustic wedge 200 can be directly powered to make the ultrasonic generator 300 generate ultrasonic waves. When the acoustic wedge 200 is not a conductive material, the electrode 310 and the coupling electrode are distributed on the opposite sides of the ultrasonic generator 300, and the ultrasonic generator 300 generates ultrasonic waves by powering the electrode 310 and the coupling electrode, and the ultrasonic waves are transmitted to the outer wall of the pipeline through the acoustic wedge 200, thereby realizing the detection of the liquid flow in the pipeline.

[0055] Further, in some embodiments, as shown in Figures 4 to 6 The ultrasonic transducer can further include an acoustic wedge pressing member 600 connected to the frame side wall 120 and pressing the acoustic wedge 200 to press the acoustic wedge 200 to the wall surface around the opening 111.

[0056] In these embodiments, the acoustic wedge pressing member 600 directly applies pressing force to the acoustic wedge 200, which is conducive to stably pressing the acoustic wedge 200 to the frame bottom wall 110, improves the installation stability of the acoustic wedge 200, and thus avoids affecting the detection accuracy of the ultrasonic transducer due to the movement of the acoustic wedge 200.

[0057] Further, the acoustic wedge pressing member 600 can have the same or similar structure as the generator pressing member 500. For example, the acoustic wedge pressing member 600 can include a pressing plate and an extrusion portion at the bottom of the pressing plate, the pressing plate is connected to the frame side wall 120, the extrusion portion is in contact with the acoustic wedge 200, and the extrusion portion has elasticity. For another example, the acoustic wedge pressing member 600 can be an elastic member, which is made of an elastic material or has elasticity. In addition, the acoustic wedge pressing member 600 can be only a pressing plate, which is connected to the frame side wall 120 and directly extrudes the acoustic wedge 200 through the pressing plate.

[0058] Further, as shown in Figure 5 , the acoustic wedge pressing member 600 can be connected with the frame side wall 120 through a second threaded member 150, such as a screw or a bolt, so that the acoustic wedge pressing member 600 can be pressed down to the acoustic wedge 200 during the process of screwing the second threaded member 150. Of course, the acoustic wedge pressing member 600 can also be connected with the frame side wall 120 through a latch, a buckle or the like, which will not be listed in detail here.

[0059] Further, in some embodiments, as shown in Figures 2 to 6 , the acoustic wedge 200 includes an acoustic wedge body 210 and a boss 220 protruding from the acoustic wedge body 210 to the direction of the frame bottom wall 110. The boss 220 extends into the opening 111 and is adapted to the opening 111. In this way, when installing the acoustic wedge 200, the boss 220 can be aligned with the opening 111 for installation, which facilitates the quick installation of the acoustic wedge 200 in place and improves the assembly efficiency. Moreover, since the boss 220 is adapted to the opening 111, the lateral movement of the acoustic wedge 200 can be limited through the opening 111, so as to avoid affecting the detection accuracy of the ultrasonic transducer due to the acoustic wedge 200 running. In addition, the boss 220 extends into the opening 111, which facilitates the boss 220 to be in close contact with the outer wall of the pipeline.

[0060] Of course, a part of the frame side wall 120 can also be in close contact with the outer side wall of the acoustic wedge 200. By limiting the acoustic wedge 200 through the frame side wall 120, the acoustic wedge 200 can also be prevented from running along the surface of the frame bottom wall 110, thereby improving the installation stability of the acoustic wedge 200.

[0061] Further, in some embodiments, as shown in Figure 6 and Figure 7 , a sink groove 112 is further provided at the edge of the opening 111 on the outer wall of the frame bottom wall 110, and the sink groove 112 is in communication with the opening 111 and extends to the outer periphery of the opening 111. Since the frame bottom wall 110 is still left around the opening 111, this part of the frame bottom wall 110 will reflect part of the ultrasonic waves generated by the ultrasonic generator 300, so that this part of the ultrasonic waves cannot be transmitted to the outer wall of the pipeline. In the present embodiment, by opening the sink groove 112 at the edge of the opening 111, the reflection of the acoustic wave can be reduced, and the transmission of the ultrasonic wave generated by the ultrasonic generator 300 to the outer wall of the pipeline can be facilitated.

[0062] Further, in some embodiments, as shown in Figure 3 and Figure 4 , at least one hole 127 is provided on the frame side wall 120 and extends through the thickness direction of the frame side wall 120. In this way, the weight of the frame side wall 120 can be reduced, thereby reducing the overall weight of the ultrasonic transducer.

[0063] Further, in some embodiments, as shown in Figure 8and Figure 13 As shown, the ultrasonic transducer also includes a housing 700 with an opening at the bottom. The acoustic wedge positioning frame 100 is disposed within the housing 700, with the acoustic wedge 200 exposed through the opening. This allows the housing 700 to protect the ultrasonic generator 300 and acoustic wedge 200 while maintaining contact between the acoustic wedge 200 and the outer wall of the pipe. A cable connector 710 is provided on the housing 700. The ultrasonic generator 300 is connected to an electrode 310, which extends from the top of the mounting cavity and is electrically connected to the cable connector 710. This facilitates the ultrasonic generator 300 in receiving and transmitting electrical signals.

[0064] By separating the compression structure of the ultrasonic generator 300 from the acoustic wedge 200, the present invention prevents deformation and fracture of the acoustic wedge 200 caused by compression forces under high-temperature conditions. Furthermore, by directly coupling the ultrasonic generator 300 to the acoustic wedge 200, the durability issues of adhesives and coupling agents in high-temperature environments are avoided, effectively addressing the weak strength of the high-temperature-resistant acoustic wedge 200. This ensures efficient and stable operation of the ultrasonic transducer in high-temperature environments. The following details the ultrasonic generator 300 according to some embodiments of the present invention.

[0065] Example 1: like Figures 1 to 6 As shown, a high-temperature resistant ultrasonic transducer includes an acoustic wedge positioning frame 100, an acoustic wedge 200, an ultrasonic generator 300 (e.g., a piezoelectric ceramic wafer), a backing 400, a generator pressing member 500 (including a pressure plate and a disc spring), and an acoustic wedge pressing member 600. The acoustic wedge positioning frame 100 comprises a bottom wall 110 and side walls 120. The bottom wall 110 is rectangular, with side walls 120 disposed on either side of the width of the bottom wall 110. An opening 111 is defined in the center of the bottom wall 110. The acoustic wedge 200 is a wedge-shaped block with a boss 220 at its bottom that mates with the opening 111. The bottom of the acoustic wedge 200 is embedded within the opening 111 of the bottom wall 110. The top of the acoustic wedge 200 has a mounting slope 211, on which the ultrasonic generator 300 is mounted. The backing 400 is disposed on the ultrasonic generator 300. The top surface of the frame sidewall 120 has a connecting slope 121 that is parallel to and higher than the mounting slope 211. The ends of the pressure plate are fixed to the connecting slopes 121 of the two frame sidewalls 120, respectively. A disc spring is provided between the pressure plate and the backing 400 to press the ultrasonic generator 300 against the mounting slope 211 of the acoustic wedge 200.

[0066] The top of the acoustic wedge 200 also has a mounting flat surface 212 adjacent to the mounting slope 211, the top of the frame side wall 120 also has a transition surface 122 and a connecting flat surface 123, the transition surface 122 is located between the connecting slope 121 and the connecting flat surface 123, the transition surface 122 is higher than the acoustic wedge 200, and the connecting flat surface 123 is parallel to the mounting flat surface 212. The two ends of the acoustic wedge pressing member 600 are connected with the connecting flat surface 123 and press the mounting flat surface 212 of the acoustic wedge 200. Specifically, the first mounting hole 125 is arranged on the connecting slope 121, the first threaded member 140 passes through the pressing plate and extends into the first mounting hole 125, and the fixed connection between the pressing plate and the frame side wall 120 is realized. The second mounting hole 126 is arranged on the connecting flat surface 123, the second threaded member 150 passes through the acoustic wedge pressing member 600 and extends into the second mounting hole 126, and the fixed connection between the acoustic wedge pressing member 600 and the frame side wall 120 is realized.

[0067] In the embodiment, when the acoustic wedge 200 is a wedge-shaped block, the frame side wall 120 is distributed on both sides of the acoustic wedge 200 in the width direction, which can reduce the material, save the cost, and reduce the weight of the ultrasonic transducer. Moreover, the top of the frame side wall 120 has the connecting slope 121 parallel to the mounting slope 211 of the acoustic wedge 200, which facilitates the accurate pressing of the ultrasonic generator 300 after the generator pressing member 500 is connected therewith. In addition, the acoustic wedge 200 is stably mounted by cooperating with the acoustic wedge pressing member 600 to press the acoustic wedge 200.

[0068] In addition, the acoustic wedge positioning frame 100 can also include a connecting rib 130 connecting the two frame side walls 120 from one side in the length direction of the acoustic wedge 200. The design of the connecting rib 130 can improve the structural strength of the acoustic wedge positioning frame 100, prevent the frame side wall 120 from being bent and deformed when the pressing plate and the acoustic wedge pressing member 610 are fixed, and further limit the acoustic wedge 200 in the direction of the connecting rib 130 to prevent the acoustic wedge 200 from moving greatly in the direction of the connecting rib 130.

[0069] In addition, as shown in Figure 8 The ultrasonic transducer also includes a shell 700, and the shell 700 is provided with a cable joint 710, and the electrode 310 of the ultrasonic generator 300 is led out below the acoustic wedge pressing member 600 and electrically connected with the cable joint 710.

[0070] The ultrasonic transducer of the embodiment fixes the acoustic wedge 200 in the acoustic wedge positioning frame 100 by cooperating the generator pressing member 500 and the acoustic wedge pressing member 600 with the acoustic wedge positioning frame 100 respectively, the bottom of the acoustic wedge 200 is embeddedly matched with the frame bottom wall 110 of the acoustic wedge positioning frame 100, the acoustic wedge positioning frame 100 and the acoustic wedge 200 are a separable split structure, and stress concentration damage to the acoustic wedge 200 can be avoided.

[0071] Furthermore, when the acoustic wedge 200 is a wedge-shaped block, the frame sidewalls 120 are distributed only on both sides of the acoustic wedge 200 in the width direction, which can reduce the material used for the acoustic wedge positioning frame 100, saving costs and reducing weight. Furthermore, the top of the frame sidewall 120 has a connecting bevel 121 parallel to the mounting bevel 211 of the acoustic wedge 200, and the top of the frame sidewall 120 also has a connecting flat surface 123 parallel to or coplanar with the connecting bevel 121 of the acoustic wedge 200. The generator pressing member 500 is connected to the connecting bevel 121, thereby pressing the ultrasonic generator 300 against the mounting bevel 211. The acoustic wedge pressing member 600 is connected to the connecting flat surface 123, thereby pressing the acoustic wedge 200 downward. This effectively prevents displacement of the ultrasonic generator 300 and the acoustic wedge 200, and improves the installation stability of the ultrasonic generator 300 and the acoustic wedge 200.

[0072] Example 2: like Figures 9 to 12 As shown, the difference from the first embodiment described above is that the acoustic wedge 200 is a square body, and the ultrasonic generator 300 is disposed on the top wall of the acoustic wedge 200. The frame sidewall 120 is cylindrical and surrounds the acoustic wedge 200. The frame sidewall 120 is taller than the acoustic wedge 200. The upper portion of the inner wall of the frame sidewall 120 expands outward to form a connecting platform 124 on the inner side. The connecting platform 124 is provided with a first mounting hole 125. The first threaded member 140 passes through the generator pressing member 500 and extends into the first mounting hole 125, thereby connecting the generator pressing member 500 to the connecting platform 124 and pressing the ultrasonic generator 300 against the acoustic wedge 200.

[0073] In this embodiment, the ultrasonic generator 300 and the generator pressing member 500 can be designed to be larger, providing a wide range of downward pressure on the ultrasonic generator 300 and indirectly on the acoustic wedge 200, thereby eliminating the need for the acoustic wedge pressing member 600. Furthermore, the frame sidewalls 120 circumferentially surround the acoustic wedge 200, providing better positioning and protection for the acoustic wedge 200 and ultrasonic generator 300.

[0074] Example 3: like Figure 14 As shown, the difference from the first embodiment described above is that the ultrasonic transducer has two generator pressing members 500 and one acoustic wedge pressing member 600. The two generator pressing members 500 are connected side by side to the connecting inclined surface 121 of the frame side wall 120 and are spaced apart. The dual-point compression of the backing 400, and thus the ultrasonic generator 300, ensures the installation stability of the ultrasonic generator 300.

[0075] Example 4: The difference between the above embodiment one and the embodiment two is that the connecting slope 121 on the top of the frame side wall 120 can not be higher than the installing slope 211. If the connecting slope 121 is coplanar with the installing slope 211 or lower than the installing slope 211, the middle part of the pressing plate can be protruded upward, so as to accommodate the disc spring below. Similarly, the connecting plane 123 can not be coplanar with the installing plane 212. If the connecting plane 123 is higher than the installing plane 212, a part of the acoustic wedge pressing member 600 can be protruded downward to press the installing plane 212. If the connecting plane 123 is lower than the installing plane 212, the two ends of the acoustic wedge pressing member 600 can be extended downward to be connected with the connecting plane 123.

[0076] Embodiment five The difference between the above embodiment one and the embodiment two is that the connecting slope 121 on the top of the frame side wall 120 can not be higher than the installing slope 211. If the connecting slope 121 is coplanar with the installing slope 211 or lower than the installing slope 211, the middle part of the pressing plate can be protruded upward, so as to accommodate the disc spring below. Similarly, the connecting plane 123 can not be coplanar with the installing plane 212. If the connecting plane 123 is higher than the installing plane 212, a part of the acoustic wedge pressing member 600 can be protruded downward to press the installing plane 212. If the connecting plane 123 is lower than the installing plane 212, the two ends of the acoustic wedge pressing member 600 can be extended downward to be connected with the connecting plane 123. Figure 12 The connecting platform 124 can be the upper surface of the flange or can be similar to the structure of the connecting platform 124.

[0077] Although the embodiments of the present application have been described in detail above, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application. It should be understood that these modifications and changes are also within the scope of the embodiments of the present application as defined by the claims.

Claims

1. An ultrasonic transducer, characterized in that: include: An acoustic wedge positioning frame (100) has a frame bottom wall (110) and a frame side wall (120), wherein the frame bottom wall (110) and the frame side wall (120) enclose a mounting cavity, and the frame bottom wall (110) has an opening (111); An acoustic wedge (200) is disposed in the mounting cavity and extends into the opening (111); an ultrasonic generator (300), arranged on a side of the acoustic wedge (200) facing away from the opening (111); a backing (400) disposed on a side of the ultrasonic generator (300) facing away from the acoustic wedge (200); The generator pressing member (500) is connected to the frame side wall (120), and the generator pressing member (500) can press the ultrasonic generator (300) against the sound wedge (200) through the backing (400), and can also apply a force to the sound wedge (200) to press the wall surface around the opening (111) on the frame bottom wall (110).

2. The ultrasonic transducer according to claim 1, characterized in that The generator pressing member (500) comprises a connecting portion (510) and an elastic portion (520), wherein the connecting portion (510) is connected to the frame side wall (120), and the elastic portion (520) is located between the connecting portion (510) and the backing (400); Wherein, the connecting portion (510) is a hard connecting plate, or the connecting portion (510) and the elastic portion (520) are integrally formed.

3. The ultrasonic transducer according to claim 2, characterized in that The generator pressing member (500) further comprises: The guide member (530) cooperates with the elastic portion (520) and is used to limit the compression deformation of the elastic portion (520) along the extension direction of the guide member during the process of squeezing the ultrasonic generator (300).

4. The ultrasonic transducer according to claim 1, characterized in that The acoustic wedge (200) is a conductive acoustic wedge, and the ultrasonic generator (300) is directly attached to the surface of the acoustic wedge (200); or The ultrasonic generator (300) is fitted to the surface of the acoustic wedge (200) via a coupling electrode.

5. The ultrasonic transducer according to claim 1, characterized in that The ultrasonic transducer also includes: An acoustic wedge pressing member (600) is connected to the frame side wall (120) and presses the acoustic wedge (200) to press the acoustic wedge (200) against the wall surfaces around the opening (111).

6. The ultrasonic transducer according to claim 1, characterized in that The sound wedge (200) comprises a sound wedge body (210) and a boss (220) protruding from the sound wedge body (210) in the direction of the frame bottom wall (110), wherein the boss (220) extends into the opening (111) and matches the opening (111).

7. The ultrasonic transducer according to claim 1, characterized in that A portion of the frame side wall (120) is in contact with the outer side wall of the sound wedge (200).

8. The ultrasonic transducer according to claim 1, characterized in that A sinking groove (112) is further provided at the edge of the opening (111) on the outer wall of the frame bottom wall (110), and the sinking groove (112) is connected to the opening (111) and extends toward the periphery of the opening (111).

9. The ultrasonic transducer according to claim 1, characterized in that The acoustic wedge (200) is a wedge-shaped block, the top of the acoustic wedge (200) has a mounting inclined surface (211), and the ultrasonic generator (300) is arranged on the mounting inclined surface (211); The frame side walls (120) are distributed on both sides of the width direction of the sound wedge (200), the top surface of the frame side walls (120) has a connecting inclined surface (121), the connecting inclined surface (121) is parallel to the mounting inclined surface (211), and both ends of the generator pressing member (500) are connected to the mounting inclined surface (211).

10. The ultrasonic transducer according to claim 9, characterized in that The top of the sound wedge (200) also has a mounting plane (212) adjacent to the mounting bevel (211), and the top of the frame side wall (120) also has a transition surface (122) and a connecting plane (123), wherein the transition surface (122) is located between the connecting bevel (121) and the connecting plane (123), and the connecting plane (123) is parallel to the mounting plane (212); The ultrasonic transducer further comprises an acoustic wedge pressing member (600), both ends of the acoustic wedge pressing member (600) being connected to the connection plane (123) and pressing the installation plane (212).

11. The ultrasonic transducer according to claim 10, characterized in that Both ends of the generator pressing member (500) are connected to the mounting inclined surface (211) via a first threaded member (140); and / or Both ends of the acoustic wedge pressing member (600) are connected to the connecting plane (123) via a second threaded member (150).

12. The ultrasonic transducer according to claim 9, characterized in that The sound wedge positioning frame (100) further comprises a connecting rib (130), wherein the connecting rib (130) connects the two frame side walls (120) from one side in the length direction of the sound wedge (200).

13. The ultrasonic transducer according to claim 1, characterized in that The sound wedge (200) is in the shape of a square, the frame side wall (120) is in the shape of a cylinder and is arranged around the sound wedge (200), the upper portion of the inner wall of the frame side wall (120) expands outward to form a connecting platform (124) on the inner side, and the generator pressing member (500) is connected to the connecting platform (124).

14. The ultrasonic transducer according to claim 1, characterized in that The generator pressing member (500) comprises a connecting portion (510) and an elastic portion (520), wherein the connecting portion (510) is connected to the frame side wall (120), and the elastic portion (520) is located between the connecting portion (510) and the backing (400); Wherein, the elastic part (520) is a spring or a rubber part, and / or the number of the elastic part (520) is at least one.

15. The ultrasonic transducer according to claim 1, characterized in that The frame side wall (120) is provided with at least one hole (127) penetrating the frame side wall in its thickness direction.

16. The ultrasonic transducer according to claim 1, characterized in that The ultrasonic transducer also includes: A shell (700) is provided with an opening at the bottom of the shell (700), the sound wedge positioning frame (100) is arranged inside the shell (700), the sound wedge (200) is exposed through the opening, a cable connector (710) is provided on the shell (700), the ultrasonic generator (300) is connected to an electrode (310), and the electrode (310) extends from the top of the installation cavity to the installation cavity and is electrically connected to the cable connector (710).

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