Ultrasonic transducer

Abstract

The embodiment of the present application provides an ultrasonic transducer, and belongs to the field of ultrasonic equipment. The ultrasonic transducer comprises: 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 a mounting cavity, the frame bottom wall having an opening; an acoustic wedge arranged in the mounting 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 with the frame side wall, the generator pressing member being capable of pressing the ultrasonic generator to the acoustic wedge through the backing and also capable of applying a force to the acoustic wedge to press the acoustic wedge to the wall surface around the opening of the frame bottom wall. The ultrasonic transducer provided by the embodiment is not prone to deformation and breakage under a high-temperature environment, and the applicability of the ultrasonic transducer under a 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 matched 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] Further, in some embodiments, the ultrasonic transducer further comprises a wedge pressing member connected to the frame side wall and pressing the acoustic wedge against the wall around the opening.

[0010] Further, in some embodiments, the acoustic wedge comprises a wedge main body and a boss protruding from the wedge main body towards the direction of the frame bottom wall, the boss extending into the opening and being adapted to the opening.

[0011] Further, in some embodiments, a part of the frame side wall is in contact with the outer wall of the acoustic wedge.

[0012] Further, in some embodiments, a sink is further provided on the outer wall of the frame bottom wall at the edge of the opening, the sink being in communication with the opening and extending towards the outer periphery of the opening.

[0013] Further, in some embodiments, the acoustic wedge is in the shape of a wedge block, the top of the acoustic wedge has a mounting slope, the ultrasonic generator is provided on the mounting slope; the frame side wall is distributed on both sides of the acoustic wedge in the width direction, the top surface of the frame side wall has a connecting slope, the connecting slope is parallel to the mounting slope, and the two ends of the generator pressing member are connected to the mounting slope.

[0014] Further, in some embodiments, the top of the acoustic wedge further has a mounting flat surface adjacent to the mounting slope, the top of the frame side wall further has a transition surface and a connecting flat surface, the transition surface is between the connecting slope and the connecting flat surface, and the connecting flat surface is parallel to the mounting flat surface; the ultrasonic transducer further comprises a wedge pressing member, the two ends of the wedge pressing member are connected to the connecting flat surface and press the mounting flat surface.

[0015] Further, in some embodiments, the two ends of the generator pressing member are connected to the mounting slope through a first threaded member; and / or the two ends of the wedge pressing member are connected to the connecting flat surface through a second threaded member.

[0016] Further, in some embodiments, the acoustic wedge positioning frame further comprises a connecting rib, the connecting rib connects the two frame side walls from one side in the length direction of the acoustic wedge.

[0017] Further, in some embodiments, the acoustic wedge is in the shape of a square block, the frame side wall is in the shape of a cylinder and is arranged around the acoustic wedge, the inner wall of the frame side wall is expanded outward at the upper part to form a connecting platform on the inner side, and the generator pressing member is connected to the connecting platform.

[0018] Further, in some embodiments, the generator pressing member comprises a connecting part and an elastic part, the connecting part is connected to the frame side wall, and the elastic part is between the connecting part and the backing; wherein the elastic part is a spring or a rubber member, and / or the number of the elastic part is at least one.

[0019] Further, in some embodiments, at least one hole is provided on the frame side wall and extends through the thickness direction of the frame side wall.

[0020] Furthermore, in some embodiments, the ultrasonic transducer further includes: a housing with an opening at the bottom, an acoustic wedge positioning frame disposed inside the housing with the acoustic wedge exposed through the opening, a cable connector disposed on the housing, and an ultrasonic generator connected to electrodes, the electrodes extending from the top of the mounting cavity and electrically connected to the cable connector.

[0021] According to the embodiments of the present invention, the ultrasonic transducer is designed with the acoustic wedge positioning frame and the acoustic wedge separately. The generator clamping component is installed on the acoustic wedge positioning frame to compress the acoustic wedge. Compared with the related technology in which the clamping structure of the ultrasonic generator is directly connected to the acoustic wedge and compresses the ultrasonic generator, the acoustic wedge is not easily deformed or broken in high-temperature environments, which can improve the applicability of the ultrasonic transducer in high-temperature environments.

[0022] Further aspects and / or advantages of the general concept of the invention 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 general concept of the invention. Attached Figure Description

[0023] The above and other objects and features of the present invention will become clearer from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 A partial structural schematic diagram of an ultrasonic transducer according to the first embodiment of this application is shown;

[0025] Figure 2 A schematic diagram of the acoustic wedge of the first embodiment of this application is shown;

[0026] Figure 3 A schematic diagram of the acoustic wedge positioning frame according to the first embodiment of this application is shown;

[0027] Figure 4 A partial side view of an ultrasonic transducer according to the first embodiment of this application is shown;

[0028] Figure 5 A partial top view of an ultrasonic transducer according to the first embodiment of this application is shown;

[0029] Figure 6 It shows Figure 5 Cross-sectional view along the AA direction;

[0030] Figure 7 It shows Figure 6 A magnified view of a portion of point I in the middle;

[0031] Figure 8 A side view schematic diagram of an ultrasonic transducer according to the first embodiment of this application is shown;

[0032] Figure 9 A partial top view of an ultrasonic transducer of the second embodiment of the application is shown;

[0033] Figure 10 A partial top view of an ultrasonic transducer of the second embodiment of the application is shown; Figure 9 A sectional view along the direction of B-B is shown;

[0034] Figure 11 A structural view of an acoustic wedge of the second embodiment of the application is shown;

[0035] Figure 12 A structural view of an acoustic wedge positioning frame of the second embodiment of the application is shown;

[0036] Figure 13 A structural view of an ultrasonic transducer of the second embodiment of the application is shown;

[0037] Figure 14 A partial structural view of an ultrasonic transducer of the third embodiment of the application is shown.

[0038] Figures 1 to 14 BRIEF DESCRIPTION OF THE DRAWINGS

[0039] 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;

[0040] 200 acoustic wedge; 210 acoustic wedge main body; 211 mounting slope; 212 mounting plane; 220 boss;

[0041] 300 ultrasonic generator; 310 electrode;

[0042] 400 backing;

[0043] 500 generator pressing member; 510 connecting portion; 520 elastic portion; 530 guide member;

[0044] 600 acoustic wedge pressing member;

[0045] 700 housing; 710 cable joint. DETAILED DESCRIPTION

[0046] The following detailed description is presented to aid the reader in gaining a comprehensive understanding of the methods, apparatuses, and / or systems described herein. However, various changes, modifications, and equivalents can be used, and thus particular embodiments described herein are not intended as being limiting as there are many different ways to implement the methods, apparatuses, and / or systems described herein. For example, the order in which operations are described is not intended to be limiting unless otherwise specified. Moreover, descriptions of features in terms of being performed in serial order are not intended to be limiting as parallel order can be possible unless specifically stated otherwise. Additionally, descriptions of features in terms of being performed or produced in a specific order are not intended to be limiting unless otherwise claimed. For example, acts can be performed in serial order, in parallel, or in some other order.

[0047] Features described herein can be implemented in different ways, and should not be construed as being limited to the examples described herein. Rather, these examples have been provided so that this disclosure will be thorough and complete, and will fully convey the scope of methods, apparatuses, and / or systems to be protected.

[0048] 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.

[0049] Although terms such as “first,” “second,” and “third” can be used herein to describe various elements, components, regions, layers, or sections, these elements, components, regions, layers, or sections should not be limited by these terms. Rather, these terms are only used to distinguish one element, component, region, layer, or section from another element, component, region, layer, or section. Thus, a first element, component, region, layer, or section referred to in the examples described herein can also be called a second element, component, region, layer, or section without departing from the teachings of the examples.

[0050] In the description, when an element such as a layer, a region, or a substrate is referred to as being “on” another element, “connected to” or “coupled to” another element, it can be directly on the other element, directly connected to or 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.

[0051] The terminology used herein is for the purpose of describing various examples only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has", "having" as used herein, specify the presence of stated features, numbers, operations, members, elements and / or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, operations, members, elements and / or combinations thereof.

[0052] The terms "above", "below", "top", "bottom" and the like in the application are defined with reference to the orientation in the drawings.

[0053] 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 this application belongs when used in the present application. Unless specifically defined otherwise in the application, terms such as, for example, terms defined in a general dictionary should be interpreted to have a meaning consistent with their meaning in the context of the relevant art and the application, and should not be interpreted ideally or too formally.

[0054] The embodiments of the application will be described below with reference to the accompanying drawings. Figures 1 to 14 The ultrasonic transducer provided by the embodiments of the application can be arranged on the outer wall of a pipeline to detect the flow rate of liquid inside the pipeline, or can be arranged at other positions or used for other purposes. Hereinafter, the ultrasonic transducer detecting the flow rate of liquid inside the pipeline is taken as an example for description.

[0055] As shown in FIGS. 1 to 3, the first aspect of the embodiments of the application provides an ultrasonic transducer, which comprises an acoustic wedge positioning frame 100, an acoustic wedge 200, an ultrasonic generator 300, a backing 400 and a generator pressing member 500. Figures 1 to 3 Figures 9 to 12 The acoustic wedge positioning frame 100 has a frame bottom wall 110 and a frame side wall 120, which enclose a mounting cavity. The frame bottom wall 110 has an opening 111, and the acoustic wedge 200 is arranged in the mounting cavity and extends into the opening 111. In this way, the acoustic wedge 200 can be coupled to the outer wall of the pipeline, so as to detect the flow rate of liquid inside the pipeline.

[0056] The ultrasonic generator 300 is arranged on the side of the acoustic wedge 200 away from the opening 111, and the backing 400 is arranged on the side of the ultrasonic generator 300 away from the acoustic wedge 200. In this way, the ultrasonic wave generated by the ultrasonic generator 300 can be transmitted to the pipeline through the acoustic wedge 200.

[0057] The ultrasonic generator 300 is arranged on the side of the acoustic wedge 200 away from the opening 111, and the backing 400 is arranged on the side of the ultrasonic generator 300 away from the acoustic wedge 200. In this way, the ultrasonic wave generated by the ultrasonic generator 300 can be transmitted to the pipeline through the acoustic wedge 200.

[0058] ​The generator pressing part 500 is connected with the frame side wall 120, and the generator pressing part 500 can press the ultrasonic generator 300 to the acoustic wedge 200 through the backing 400, and can also apply a wall pressing force to the acoustic wedge 200 around the opening 111 in the frame bottom wall 110.

[0059] In the prior art, the pressing structure of the piezoelectric ceramic is directly connected with the acoustic wedge and extrudes the piezoelectric ceramic to make it forcibly adhere to the acoustic wedge. Since there is a significant difference in the thermal expansion coefficients of the piezoelectric ceramic and the acoustic wedge, when the working environment temperature is very high, the difference in thermal expansion deformation of the piezoelectric ceramic and the acoustic wedge is large, and the pressing structure fixed to the acoustic wedge will also be displaced. The difference in expansion will cause a sudden increase in local stress at the interface between the piezoelectric ceramic and the acoustic wedge, forming a thermal stress concentration. Under the action of the pressing force of the pressing structure, the acoustic wedge is easily deformed or broken, and even the piezoelectric ceramic is damaged.

[0060] In the embodiment, the acoustic wedge positioning frame 100 and the acoustic wedge 200 are designed in a split type, and the generator pressing part 500 is installed on the acoustic wedge positioning frame 100 to extrude the acoustic wedge 200. The generator pressing part 500 is not affected or almost not affected by the thermal expansion of the acoustic wedge 200, which can effectively prevent the thermal stress concentration at the interface between the ultrasonic generator 300 and the acoustic wedge 200, and further can avoid the deformation and breakage of the acoustic wedge 200 in a high-temperature environment, and avoid the damage of the ultrasonic generator 300, which is conducive to the stable operation of the ultrasonic transducer in a high-temperature environment.

[0061] Moreover, in addition to extruding the ultrasonic generator 300 through the backing 400, the generator pressing part 500 can also indirectly apply a wall pressing force to the acoustic wedge 200 around the opening 111 in the frame bottom wall 110, which is also conducive to improving the installation stability of the acoustic wedge 200.

[0062] It should be noted that in the embodiment, the generator pressing part 500 is connected with the frame side wall 120, which can be directly connected or indirectly connected. In addition, in the present application, the generator pressing part 500 can apply a wall pressing force to the acoustic wedge 200 around the opening 111 in the frame bottom wall 110, which is assumed to be smaller than the size of the frame bottom wall 110, and the opening 111 still has the frame bottom wall 110 around it to facilitate the positioning of the acoustic wedge 200. In addition, the indirect pressing force of the generator pressing part 500 to the acoustic wedge 200 can be large or small, and the fixation of the acoustic wedge 200 can mainly rely on the pressing of the generator pressing part 500, or the pressing of the generator pressing part 500 can only play an auxiliary role, which does not mean that the acoustic wedge 200 can only be fixed by the pressing of the generator pressing part 500.

[0063] Further, as shown in FIG. 6, the generator pressing part 500 can be connected with the frame side wall 120 through a connecting rod 510. Figure 6 And Figure 10As shown, the generator pressing member 500 can include a connecting portion 510 connected to the frame side wall 120 and an elastic portion 520 located between the connecting portion 510 and the backing 400.

[0064] Here, the generator pressing member 500 includes the elastic portion 520, which facilitates the elastic portion 520 being pressed to fully extrude the ultrasonic generator 300 without damaging the ultrasonic generator 300, and improves the installation stability of the ultrasonic generator 300. Moreover, in a high-temperature environment, the elastic portion 520 can also absorb the stress generated by temperature changes, thereby further preventing the acoustic wedge 200 from deforming or breaking in a high-temperature environment.

[0065] The connecting portion 510 can be a hard connecting plate, which facilitates firm connection with the frame side wall 120 and facilitates fully pressing the elastic portion 520. At this time, the connecting portion 510 and the elastic portion 520 are designed in a split type, which can be directly attached, adhered together, or fixed together by other means.

[0066] The elastic portion 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 portion 520 can also be a silica gel piece, and the like, which will not be listed in detail here.

[0067] The number of elastic portions 520 can be one or at least two. In the case of at least two elastic portions 520, the at least two elastic portions 520 can be distributed at intervals along the acoustic wedge 200. At this time, the number of connecting portions 510 can be one, which simultaneously presses the at least two elastic portions 520, or the connecting portions 510 can be distributed one-to-one with the elastic portions 520.

[0068] Of course, the connecting portion 510 can also be integrally formed with the elastic portion 520. Both are made of the same material, so that the generator pressing member 500 is made of an elastic material as a whole or has elasticity, which has a simple structure, reduces parts, and facilitates assembly. For example, the generator pressing member 500 can be a high-temperature-resistant plastic piece, a part of which is shaped as the connecting portion 510 to be connected to the acoustic wedge positioning frame 100, and another part is shaped as a spring to generate elastic force.

[0069] Further, as shown in Figure 6 and Figure 10 The generator pressing member 500 can also include a guide member 530 cooperating with the elastic portion 520, which is used to limit the elastic portion 520 from being compressed and deformed in the extension direction of the guide member during extrusion of the ultrasonic generator 300. In this way, the elastic portion 520 can be prevented from being skewed and displaced during compression, and the generator pressing member 500 can be ensured to stably extrude the ultrasonic generator 300.

[0070] As an example, as shown inFigure 6 and Figure 10 As shown, the guide member 530 can be a guide rod, and both the connecting part 510 and the elastic part 520 are provided with through holes, into which the guide rod extends. Alternatively, the guide member 530 can be a guide sleeve, into which the elastic part 520 extends and is limited by the side wall of the guide sleeve.

[0071] Furthermore, such as Figure 1 and Figure 5 As shown, the generator clamping member 500 can be connected to the frame side wall 120 via the first threaded part 140, such as a screw or bolt, to facilitate the pressurizing member 500 against the backing 400 during the tightening of the first threaded part 140. Of course, the generator clamping member 500 can also be connected to the frame side wall 120 via a pin, snap-fit, or other structure, which will not be detailed here.

[0072] Furthermore, in some embodiments, such as Figure 6 and Figure 10 As shown, 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.

[0073] In existing technologies, piezoelectric ceramic wafers are typically bonded to the acoustic wedge 200 using adhesives or by pressing them onto the acoustic wedge 200 using coupling agents. However, the durability of adhesives or coupling agents is insufficient at high temperatures, which can affect the stable operation of the ultrasonic transducer under high-temperature conditions. In this embodiment, the ultrasonic generator 300 is directly attached to the surface of the acoustic wedge 200, or is attached to the surface of the acoustic wedge 200 through a coupling electrode, eliminating the need for adhesives or coupling agents and avoiding the aforementioned problems. At the same time, the ultrasonic generator 300 is pressed down by the generator clamping component 500, ensuring the installation stability of the ultrasonic generator 300.

[0074] 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 softer metal sheet, which can be used to fully fit the ultrasonic generator 300 and the acoustic wedge 200.

[0075] 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 an electrically conductive member, the electrode 310 and the acoustic wedge 200 can be directly electrified to make the ultrasonic generator 300 generate ultrasonic waves. When the acoustic wedge 200 is not an electrically conductive member, the electrode 310 and the coupling electrode are distributed on opposite sides of the ultrasonic generator 300, and the ultrasonic generator 300 is electrified through the electrode 310 and the coupling electrode to generate ultrasonic waves, which are transmitted to the outer wall of the pipeline through the acoustic wedge 200, thereby achieving detection of the flow of the liquid in the pipeline.

[0076] 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 against the wall around the opening 111.

[0077] In these embodiments, the acoustic wedge pressing member 600 directly applies a pressing force to the acoustic wedge 200, which is beneficial to stably press the acoustic wedge 200 against 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.

[0078] 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 connected to the frame side wall 120 and an extrusion portion at the bottom of the pressing plate, and the extrusion portion is in contact with the acoustic wedge 200 and 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 connected to the frame side wall 120, which directly extrudes the acoustic wedge 200 through the pressing plate.

[0079] Further, as shown in Figure 5 the acoustic wedge pressing member 600 can be connected to the frame side wall 120 through a second threaded member 150, such as a screw or a bolt, which facilitates the process of screwing the second threaded member 150 to press the acoustic wedge 200 downward by the acoustic wedge pressing member 600. Of course, the acoustic wedge pressing member 600 can also be connected to the frame side wall 120 through a latch, a buckle, or the like, which will not be enumerated in detail here.

[0080] Further, in some embodiments, as shown in Figures 2 to 6As shown, the acoustic wedge 200 includes an acoustic wedge body 210 and a boss 220 protruding from the acoustic wedge body 210 towards the direction where the frame bottom wall 110 is located, 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 also be limited through the opening 111, so as to avoid affecting the detection accuracy of the ultrasonic transducer due to the movement of the acoustic wedge 200. In addition, the boss 220 extends into the opening 111, which facilitates the boss 220 to be attached to the outer wall of the pipeline.

[0081] Of course, a part of the frame side wall 120 can also be attached to the outer wall of the acoustic wedge 200. By limiting the acoustic wedge 200 through the frame side wall 120, the movement of the acoustic wedge 200 along the surface of the frame bottom wall 110 can also be prevented, thereby improving the installation stability of the acoustic wedge 200.

[0082] Further, in some embodiments, as shown in Figure 6 and Figure 7 the edge of the opening 111 on the outer wall of the frame bottom wall 110 is also provided with a sink 112, the sink 112 is in communication with the opening 111 and extends to the outer periphery of the opening 111. Since the four sides of the opening 111 still have the frame bottom wall 110, 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 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.

[0083] Further, in some embodiments, as shown in Figure 3 and Figure 4 the frame side wall 120 is provided with at least one hole 127 extending 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.

[0084] Further, in some embodiments, as shown in Figure 8 and Figure 13As shown, the ultrasonic transducer further comprises a shell 700, the bottom of the shell 700 is open, the acoustic wedge positioning frame 100 is arranged inside the shell 700, and the acoustic wedge 200 is exposed through the opening. In this way, the shell 700 can protect the internal ultrasonic generator 300 and the acoustic wedge 200, and will not affect the adhesion of the acoustic wedge 200 to the outer wall of the pipeline. The shell 700 is provided with a cable connector 710, the electrode 310 connected with the ultrasonic generator 300 extends out of the mounting cavity and is electrically connected with the cable connector 710. In this way, it is convenient for the ultrasonic generator 300 to receive or transmit electrical signals outward.

[0085] The present application separates the compression structure of the ultrasonic generator 300 from the acoustic wedge 200, avoiding deformation and fracture of the acoustic wedge 200 caused by compression force under high temperature conditions. Moreover, the ultrasonic generator 300 is directly coupled with the acoustic wedge 200, avoiding the problem of insufficient durability of adhesives and coupling agents in high temperature environment, effectively solving the problem of poor strength of high temperature resistant acoustic wedge 200, thereby realizing efficient and stable operation of the ultrasonic transducer in high temperature environment. Hereinafter, the ultrasonic generator 300 of some embodiments of the present application will be described in detail.

[0086] Embodiment one:

[0087] As shown in Figures 1 to 6 A high-temperature-resistant ultrasonic transducer, comprising an acoustic wedge positioning frame 100, an acoustic wedge 200, an ultrasonic generator 300 (such as a piezoelectric ceramic wafer), a backing 400, a generator compression member 500 (including a compression plate and a disc spring) and an acoustic wedge compression member 600. The acoustic wedge positioning frame 100 comprises a frame bottom wall 110 and a frame side wall 120, the frame bottom wall 110 is rectangular, the two sides of the frame bottom wall 110 in the width direction are respectively provided with the frame side wall 120, and the center of the frame bottom wall 110 is provided with an opening 111. The acoustic wedge 200 is a wedge-shaped block, the bottom of the acoustic wedge 200 is provided with a boss 220 matched with the opening 111, and the bottom of the acoustic wedge 200 is embedded in the opening 111 of the frame bottom wall 110. The top of the acoustic wedge 200 is provided with a mounting inclined surface 211, the ultrasonic generator 300 is arranged on the mounting inclined surface 211, and the ultrasonic generator 300 is provided with the backing 400. The top surface of the frame side wall 120 is provided with a connecting inclined surface 121, the connecting inclined surface 121 is parallel to and higher than the mounting inclined surface 211. The two ends of the compression plate are respectively fixed on the connecting inclined surfaces 121 of the two frame side walls 120, and the disc spring is arranged between the compression plate and the backing 400, so as to compress the ultrasonic generator 300 on the mounting inclined surface 211 of the acoustic wedge 200.

[0088] 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.

[0089] 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.

[0090] 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 600 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.

[0091] In addition, as shown in the drawings, the ultrasonic transducer also includes a shell 700, 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. Figure 8

[0092] 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 the damage of the acoustic wedge 200 caused by stress concentration can be avoided.

[0093] ​Furthermore, when the acoustic wedge 200 is wedge-shaped, 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 in the acoustic wedge positioning frame 100, save costs, and reduce weight. In addition, the top of the frame sidewall 120 has a connecting slope 121 parallel to the mounting slope 211 of the acoustic wedge 200, and the top of the frame sidewall 120 also has a connecting plane 123 parallel to or coplanar with the connecting slope 121 of the acoustic wedge 200. The generator clamping member 500 is connected to the connecting slope 121, thereby pressing the ultrasonic generator 300 against the mounting slope 211. The acoustic wedge clamping member 600 is connected to the connecting plane 123 to press down the acoustic wedge 200, which can effectively prevent the ultrasonic generator 300 and the acoustic wedge 200 from shifting, and improve the installation stability of the ultrasonic generator 300 and the acoustic wedge 200.

[0094] Example 2:

[0095] like Figures 9 to 12 As shown, the difference from Embodiment 1 above is that the acoustic wedge 200 is square, and an ultrasonic generator 300 is installed on the top wall of the acoustic wedge 200. The frame sidewall 120 is cylindrical, surrounding the acoustic wedge 200, and the height of the frame sidewall 120 is higher than that of the acoustic wedge 200. The upper part of the inner wall of the frame sidewall 120 expands outward to form a connecting platform 124 on the inner side. A first mounting hole 125 is provided on the connecting platform 124. A first threaded member 140 passes through the generator clamping member 500 and extends into the first mounting hole 125, so that the generator clamping member 500 is connected to the connecting platform 124 and the ultrasonic generator 300 is pressed against the acoustic wedge 200.

[0096] In this embodiment, the ultrasonic generator 300 and the generator clamping member 500 can be designed to be larger, allowing for greater downward pressure on the ultrasonic generator 300 and indirectly on the acoustic wedge 200, thus eliminating the need for the acoustic wedge clamping member 600. Furthermore, the frame sidewall 120 circumferentially surrounds the acoustic wedge 200, providing better positioning and protection for both the acoustic wedge 200 and the ultrasonic generator 300.

[0097] Example 3:

[0098] like Figure 14 As shown, the difference from Embodiment 1 above is that the ultrasonic transducer has two generator clamping parts 500 and one acoustic wedge clamping part 600. The two generator clamping parts 500 are connected side by side to the connecting inclined surface 121 of the frame sidewall 120 and are spaced apart. The dual-point compression backing 400, and thus the ultrasonic generator 300, can ensure the installation stability of the ultrasonic generator 300.

[0099] Example 4:

[0100] The difference between the above embodiment one 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 the connecting slope 121 is 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.

[0101] Embodiment five:

[0102] The difference between the above embodiment two is that the height of the frame side wall 120 can not be higher than the acoustic wedge 200, but equal to or lower than the height of the acoustic wedge 200. At this time, the upper part of the frame side wall 120 can still be expanded outward to form a connecting platform 124 on the inner side, and the two ends of the pressing plate can be protruded downward to be connected with the connecting platform 124. The connecting platform 124 can also be the upper surface of the flange, or similar to the middle structure. Figure 12

[0103] Although the embodiments of the present application have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present application without departing from the spirit and scope of the present application. It should be understood that these modifications and variations will still fall within the spirit and scope of the embodiments of the present application defined by the claims.​

Claims

1. An ultrasonic transducer, characterized in that, include: The acoustic wedge positioning frame (100) has a bottom wall (110) and a side wall (120), the bottom wall (110) and the side wall (120) forming an installation cavity, and the bottom wall (110) has an opening (111). A sound wedge (200) is disposed in the mounting cavity and extends into the opening (111). An ultrasonic generator (300) is disposed on the side of the acoustic wedge (200) opposite to the opening (111); A backing (400) is disposed on the side of the ultrasonic generator (300) opposite to the acoustic wedge (200); The generator clamping member (500) is connected to the side wall (120) of the frame. The generator clamping 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 against the wall surface around the opening (111) on the bottom wall (110) of the frame. The generator clamping member (500) includes a connecting part (510) and an elastic part (520). The connecting part (510) is connected to the frame sidewall (120), and the elastic part (520) is located between the connecting part (510) and the backing (400).

2. The ultrasonic transducer according to claim 1, characterized in that, The connecting part (510) is a rigid connecting plate, or the connecting part (510) and the elastic part (520) are integrally formed.

3. The ultrasonic transducer according to claim 1, characterized in that, The generator clamping element (500) also includes: The guide (530), in cooperation with the elastic part (520), is used to limit the elastic part (520) from compressing and deforming along the extension direction of the guide during the compression of 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 attached 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: A sound wedge clamping member (600) is connected to the frame sidewall (120) and presses the sound wedge (200) to press the sound wedge (200) against the wall surface around the opening (111).

6. The ultrasonic transducer according to claim 1, characterized in that, The acoustic wedge (200) includes an acoustic wedge body (210) and a boss (220) protruding from the acoustic wedge body (210) toward the bottom wall (110) of the frame. The boss (220) extends into the opening (111) and is adapted to the opening (111).

7. The ultrasonic transducer according to claim 1, characterized in that, A portion of the frame sidewall (120) is abutted against the outer sidewall of the acoustic wedge (200).

8. The ultrasonic transducer according to claim 1, characterized in that, A recessed groove (112) is also provided at the edge of the opening (111) on the outer wall of the bottom wall (110) of the frame. The recessed groove (112) is connected to the opening (111) and extends to the outer 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, and the top of the acoustic wedge (200) has a mounting slope (211), and the ultrasonic generator (300) is disposed on the mounting slope (211). The frame sidewalls (120) are distributed on both sides of the width direction of the acoustic wedge (200). The top surface of the frame sidewalls (120) has a connecting slope (121). The connecting slope (121) is parallel to the mounting slope (211). The two ends of the generator clamping member (500) are connected to the mounting slope (211).

10. The ultrasonic transducer according to claim 9, characterized in that, The top of the acoustic wedge (200) also has a mounting plane (212) adjacent to the mounting ramp (211), and the top of the frame sidewall (120) also has a transition surface (122) and a connecting plane (123). The transition surface (122) is located between the connecting ramp (121) and the connecting plane (123), and the connecting plane (123) is parallel to the mounting plane (212). The ultrasonic transducer also includes an acoustic wedge clamping member (600), the two ends of which are connected to the connecting plane (123) and press against the mounting plane (212).

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

12. The ultrasonic transducer according to claim 9, characterized in that, The acoustic wedge positioning frame (100) also includes a connecting rib (130), which connects the two frame sidewalls (120) from one side of the acoustic wedge (200) along its length.

13. The ultrasonic transducer according to claim 1, characterized in that, The acoustic wedge (200) is square, and the frame sidewall (120) is cylindrical and surrounds the acoustic wedge (200). The upper part of the inner wall of the frame sidewall (120) expands outward to form a connecting platform (124) on the inner side. The generator clamping member (500) is connected to the connecting platform (124).

14. The ultrasonic transducer according to claim 1, characterized in that, The elastic part (520) is a spring or a rubber part, and / or the number of the elastic parts (520) is at least one.

15. The ultrasonic transducer according to claim 1, characterized in that, The frame sidewall (120) is provided with at least one hole (127) that extends through its own thickness direction.

16. The ultrasonic transducer according to claim 1, characterized in that, The ultrasonic transducer also includes: The housing (700) has an opening at the bottom. The acoustic wedge positioning frame (100) is disposed inside the housing (700). The acoustic wedge (200) is exposed through the opening. A cable connector (710) is provided on the housing (700). An electrode (310) is connected to the ultrasonic generator (300). The electrode (310) extends out of the top of the mounting cavity and is electrically connected to the cable connector (710).

Images