Ultrasonic transducer and ultrasonic flowmeter

Abstract

The utility model provides an ultrasonic transducer and an ultrasonic flowmeter, and relates to the technical field of flow detection. The ultrasonic transducer comprises a shell, a transducer core body and a fixing piece. The transducer core can be used for detecting ultrasonic signals and converting the ultrasonic signals into electrical signals. The fixing part and the main body part are of an integrated structure, and the fixing part is connected with the shell, so that the main body part can be fixedly connected with the shell through the fixing part. Therefore, the main body part and the shell are relatively fixed, so that the main body part can stably and reliably fix the transducer core body in the accommodating cavity of the shell. According to the ultrasonic transducer, the fixing part and the main body part are of the integrated structure, so that the main body part and the shell can be assembled when the fixing part and the shell are assembled, the fixing part and the main body part do not need to be independently installed, and the assembling efficiency of the ultrasonic transducer is improved. In addition, the fixing part and the main body part are of an integrated structure, the connection reliability of the fixing part and the main body part can be better, and therefore the connection between the fixing part and the shell is more stable and reliable.

Description

Technical Field

[0001] This application relates to an ultrasonic transducer and an ultrasonic flow meter, belonging to the field of flow detection technology. Background Technology

[0002] An ultrasonic transducer is a device that converts electrical energy into ultrasonic energy or vice versa. The working principle of an ultrasonic transducer is primarily based on the piezoelectric effect, which states that certain materials generate an electric charge when subjected to mechanical stress, and conversely, undergo mechanical deformation when an electric field is applied. Ultrasonic transducers can be used in ultrasonic flow meters to detect the flow rate of gas in gas pipelines.

[0003] An ultrasonic transducer mainly consists of a housing and a transducer core. To improve the reliability and stability of the ultrasonic transducer, the transducer core needs to be reliably fixed inside the housing. However, current methods for fixing the transducer core involve cumbersome procedures. Utility Model Content

[0004] This application provides an ultrasonic transducer and an ultrasonic flow meter, which solves the problem of cumbersome transducer core fixing methods in related technologies.

[0005] In a first aspect, this application provides an ultrasonic transducer, comprising:

[0006] The shell has a cavity;

[0007] A transducer core, at least a portion of which is disposed within the cavity;

[0008] The fastener includes a main body and a fixing part. At least a portion of the main body is disposed within the cavity to fix the transducer core within the cavity. The fixing part is connected to the housing. The main body and the fixing part are an integral structure.

[0009] In some embodiments, the housing further has a mounting port connected to the cavity, the cavity having a bottom wall opposite to the mounting port, one side of the transducer core abutting against the bottom wall, at least a portion of the main body being located between the mounting port and the bottom wall, the main body and the transducer core being in upper limit engagement in the direction from the bottom wall to the mounting port, and the fastener sealing the mounting port.

[0010] In some embodiments, the transducer core includes a piezoelectric part, a backing, and a matching part. The matching part is disposed on the bottom wall, the piezoelectric part is disposed on the side of the matching part facing away from the bottom wall, the backing is connected to the side of the piezoelectric part facing away from the bottom wall, and the main body abuts against the side of the backing facing away from the piezoelectric part.

[0011] In some embodiments, the transducer core further includes a conductive portion, one end of which is connected to the piezoelectric portion, and the other end of which passes through the mounting port to the outside of the housing.

[0012] In some embodiments, the main body has a mounting groove on the side facing the backing, and the side of the backing away from the piezoelectric part is embedded in the mounting groove.

[0013] In some embodiments, the ultrasonic transducer further includes a connecting portion, the main body includes a first cavity, the backing includes a connecting cavity, the first cavity communicates with the connecting cavity, the connecting portion is disposed between the first cavity and the connecting cavity, and the connecting portion is connected to both the main body and the backing.

[0014] In some embodiments, the fastener further includes a sealing portion, the side of the main body away from the backing extends through the mounting port to the outside of the housing, the main body further includes a second cavity, one end of the second cavity is connected to the first cavity, the surface of the main body has an opening connected to the other end of the second cavity, the main body blocks the mounting port, and the sealing portion blocks the second cavity.

[0015] In some embodiments, the end of the conductive part away from the piezoelectric part passes sequentially through the connecting cavity, the first cavity, and the second cavity to the outside of the housing; both the sealing part and the connecting part are potted with adhesive; and the connecting part fills the first cavity and the connecting cavity.

[0016] In some embodiments, the ultrasonic transducer further includes a dielectric layer, the transducer core includes a coupling surface facing the bottom wall of the cavity and a first filling surface facing the side wall of the cavity, at least a portion of the coupling surface has a gap with the bottom wall of the cavity to form a coupling cavity, at least a portion of the first filling surface has a gap with the side wall of the cavity to form a first filling cavity, the fixing member includes a second filling surface facing the inner wall of the cavity, at least a portion of the second filling surface has a gap with the inner wall of the cavity to form a second filling cavity, the dielectric layer fills the coupling cavity, the first filling cavity and the second filling cavity, and the dielectric layer is liquid.

[0017] In some embodiments, the coupling cavity is in communication with the second filling cavity, the second filling cavity is in communication with the second cavity body, and the dielectric layer is also filled in the second cavity body.

[0018] In some embodiments, the side wall of the main body is provided with a liquid injection hole, and the two ends of the liquid injection hole are respectively connected to the second cavity and the second filling cavity.

[0019] In some embodiments, there are multiple injection holes arranged circumferentially along the main body.

[0020] In some embodiments, the dielectric layer is made of at least one of silicone oil and castor oil.

[0021] In some embodiments, the fixing part is sleeved on the main body and located inside the cavity, and the fixing part is threadedly connected to the inner wall of the cavity.

[0022] Secondly, based on the ultrasonic transducer described above, this application also provides an ultrasonic flow meter, including the ultrasonic transducer described above.

[0023] In the ultrasonic transducer provided in this application, the transducer core is disposed within the cavity of the housing, allowing the housing to protect the transducer core. The transducer core is used to detect ultrasonic signals and convert them into electrical signals. At least a portion of the main body of the fixing member is disposed within the cavity, allowing the main body to fix the transducer core within the cavity of the housing. The fixing part and the main body are integrally formed, and the fixing part is connected to the housing, allowing the main body to be fixedly connected to the housing via the fixing part. This keeps the main body and the housing relatively fixed, enabling the main body to stably and reliably fix the transducer core within the cavity of the housing. The integral structure of the fixing part and the main body allows the main body to be assembled with the housing during the assembly of the fixing part, eliminating the need for separate installation of the fixing part and the main body, thus improving the assembly efficiency of the ultrasonic transducer of this application. Furthermore, the integral structure of the fixing part and the main body also improves the reliability of the connection between the fixing part and the main body, resulting in a more stable and reliable connection between the fixing member and the housing.

[0024] The ultrasonic flow meter provided in this application, including the ultrasonic transducer mentioned above, simplifies the assembly process of the ultrasonic flow meter and improves its stability. Attached Figure Description

[0025] The above and other objects, features, and advantages of embodiments of this application will become more readily understood through the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application will be described by way of example and non-limitation, wherein:

[0026] Figure 1 This is a schematic diagram of an ultrasonic transducer according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the housing of the ultrasonic transducer according to an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the fixing member of the ultrasonic transducer according to an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of the transducer core of the ultrasonic transducer according to an embodiment of this application;

[0030] Figure 5 This is a top view of the fixture of the ultrasonic transducer according to an embodiment of this application.

[0031] Figure label:

[0032] 100 - Housing, 110 - Cavity, 111 - Coupling cavity, 112 - Second filling cavity, 113 - First filling cavity, 120 - Mounting port

[0033] 200 - Transducer core, 210 - Piezoelectric part, 220 - Backing, 221 - Connecting cavity, 230 - Conductive part, 240 - Matching part.

[0034] 300 - Fixing component, 310 - Main body, 311 - First cavity, 312 - Second cavity, 313 - Injection hole, 320 - Fixing part, 330 - Sealing part.

[0035] 400 - Connecting part. Detailed Implementation

[0036] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] An ultrasonic transducer is a device that converts electrical energy into ultrasonic energy or vice versa. The working principle of an ultrasonic transducer is primarily based on the piezoelectric effect, which states that certain materials generate an electric charge when subjected to mechanical stress, and conversely, undergo mechanical deformation when an electric field is applied. Ultrasonic transducers can be used in ultrasonic flow meters to detect the flow rate of gas in gas pipelines.

[0043] An ultrasonic transducer mainly consists of a housing and a transducer core. To improve the reliability and stability of the ultrasonic transducer, the transducer core needs to be reliably fixed inside the housing. Currently, for ease of assembly, ultrasonic transducers have an opening on one side of the housing through which the transducer core is removed and installed from within the housing. After the transducer core is installed, a cover plate is used to seal the opening, and finally, a fixing device is used to secure the cover plate to the opening, thus fixing the transducer core inside the housing. This process requires disassembling and reassembling the transducer core, cover plate, and fixing device each time the transducer core is removed and installed, making the assembly and disassembly process of the ultrasonic transducer complex and cumbersome.

[0044] In the ultrasonic transducer proposed in this application, the transducer core is disposed within the cavity of the housing, allowing the housing to protect the transducer core. The transducer core is used to detect ultrasonic signals and convert them into electrical signals. At least a portion of the main body of the fixing member is disposed within the cavity, allowing the main body to fix the transducer core within the cavity of the housing. The fixing part and the main body are integrally formed, and the fixing part is connected to the housing, allowing the main body to be fixedly connected to the housing via the fixing part. This keeps the main body and the housing relatively fixed, enabling the main body to stably and reliably fix the transducer core within the cavity of the housing. The integral structure of the fixing part and the main body allows the main body to be assembled with the housing during the assembly of the fixing part, eliminating the need for separate installation of the fixing part and the main body, thus improving the assembly efficiency of the ultrasonic transducer of this application. Furthermore, the integral structure of the fixing part and the main body also improves the reliability of the connection between the fixing part and the main body, resulting in a more stable and reliable connection between the fixing member and the housing.

[0045] The ultrasonic transducer and ultrasonic flow meter provided in this application will be described in detail below with reference to specific embodiments.

[0046] This application discloses an ultrasonic transducer, with reference to... Figures 1 to 3 As shown, it includes a housing 100, a transducer core 200, and a fixing member 300. This ultrasonic transducer can be used in ultrasonic flow meters.

[0047] The housing 100 is the basic component of the ultrasonic transducer of this application. The housing 100 provides a mounting base for at least some of the other components of the ultrasonic transducer and serves to protect them. The housing 100 can be made of a metallic material, giving it better structural strength, thus improving its durability and reliability. Alternatively, the housing 100 can be made of a polymer material, allowing it to maintain a certain structural strength while remaining relatively lightweight.

[0048] The housing 100 has a cavity 110, which is a hollow structure inside the housing 100. The housing 100 also has a mounting port 120, which is an opening on the surface of the housing 100 and can communicate with the cavity 110.

[0049] The transducer core 200 can be used to detect ultrasonic waves and convert them into electrical signals. At least a portion of the transducer core 200 is disposed within the cavity 110 of the housing 100. The housing 100 serves to protect the transducer core 200, preventing it from being directly exposed to the environment outside the housing 100 and thus damaged. When the housing 100 is placed in the ultrasonic flow meter, the ultrasonic waves generated by the gas flow in the gas pipeline can pass through the housing 100 into the cavity 110 and be detected and converted into electrical signals by the transducer core 200. The transducer core 200 can also be electrically connected to external processing equipment, allowing it to transmit electrical signals to the external processing equipment, which can then determine the gas flow rate in the gas pipeline based on the electrical signals.

[0050] The fixing member 300 includes a main body 310 and a fixing part 320. At least a portion of the main body 310 can be disposed within the cavity 110, and the main body 310 is fixed to the transducer core 200. The fixing part 320 and the main body 310 are integrally structured, allowing the fixing part 320 and the main body 310 to be connected for relative fixation. The fixing part 320 is connected to the housing 100, so that the main body 310 can be relatively fixed to the housing 100 through the fixing part 320. The main body 310 is also connected to the transducer core 200, so that the main body 310 and the transducer core 200 are relatively fixed, thereby allowing the transducer core 200 to be relatively fixed to the housing 100 through the main body 310 and the fixing part 320, so that the transducer core 200 can be fixed within the cavity 110 of the housing 100.

[0051] When assembling the ultrasonic transducer of this application, by connecting the fixing part 320 of the fixing member 300 to the housing 100, the main body 310 can be relatively fixed to the housing 100, and the main body 310 can fix the transducer core 200 within the cavity 110. In this way, while connecting the fixing part 320 to the housing 100, the main body 310 can fix the Huaneng component within the cavity 110 of the housing 100, thereby improving the assembly efficiency of the ultrasonic transducer of this application.

[0052] Furthermore, the fixing part 320 and the main body part 310 are an integral structure, which makes the connection between the fixing part 320 and the main body part 310 more reliable and stable. When manufacturing the fixing part 300, the main body part 310 and the main body part 310 can also be manufactured at one time, so that the main body part 310 and the fixing part 320 do not need to be assembled separately.

[0053] In some implementations, reference Figure 1 and Figure 2 As shown, the housing 100 of this application may also be provided with a mounting port 120, which can be connected to the cavity 110 of the housing 100. The transducer core 200 and the fixing member 300 can be disassembled and assembled from the cavity 110 of the housing 100 through the mounting port 120. Specifically, the inner diameter of the mounting port 120 is set to allow at least a portion of the transducer core and at least a portion of the fixing member 300 to pass through. The cavity 110 of the housing 100 also has a bottom wall, which is one inner wall of the cavity 110 and is opposite to the mounting port 120 of the housing 100.

[0054] One side of the transducer core 200 abuts against the bottom wall of the cavity 110, allowing the bottom wall of the cavity 110 to limit the transducer core 200. At least a portion of the main body 310 is located between the mounting port 120 and the bottom wall of the cavity 110, and the main body 310 and the transducer core 200 are engaged in a limiting fit in the direction from the bottom wall of the cavity 110 to the mounting port 120. This allows at least a portion of the main body 310 to seal the transducer core 200 within the cavity 110 of the housing 100, preventing the transducer core 200 from moving within the cavity 110 and thus achieving the purpose of fixing the transducer core 200.

[0055] Since the mounting port 120 is opposite to the bottom wall of the cavity 110, when installing the transducer core 200, it can be inserted into the cavity 110 of the housing 100 through the mounting port 120, and then moved towards the bottom wall by pressing it until it abuts against the bottom wall. When removing the transducer core 200, it can be moved towards the mounting port 120 and out of the cavity 110 of the housing 100 by applying a pulling force. This ensures that the transducer core 200 does not change its direction of movement during disassembly, making the assembly and disassembly process simple and convenient.

[0056] In some implementations, reference Figure 1 and Figure 4As shown, in order for the transducer core 200 of this application to convert ultrasonic waves into electrical signals, the transducer core 200 may include a piezoelectric part 210, a backing 220, and a matching part 240. The matching part 240 is disposed on the bottom wall, allowing it to abut against the bottom wall of the cavity 110. The piezoelectric part 210 is disposed on the side of the matching part 240 facing away from the bottom wall, with a gap between the matching part 240 and the bottom wall. When external ultrasonic waves pass through the housing 100 and enter the cavity 110, the ultrasonic waves act on the piezoelectric part 210, converting the ultrasonic signal into an electrical signal. The backing 220 is connected to the side of the piezoelectric part 210 facing away from the matching part 240, and the backing 220 serves to filter part of the signal. The main body 310 and the backing 220 abut against the side of the piezoelectric part 210 away from the piezoelectric part 210, so that the main body 310 can be pressed onto the backing 220, thereby pressing the piezoelectric part 210 onto the bottom wall of the cavity 110, so that the piezoelectric part 210 and the backing 220 are fixed between the main body 310 and the bottom wall of the cavity 110.

[0057] The piezoelectric part 240 can be a ceramic sheet structure. The piezoelectric part 230, the matching part 240 and the backing 220 can be fixed together by adhesive bonding, so that the fixed connection of the three is convenient and reliable.

[0058] In some implementations, reference Figure 1 and Figure 4 As shown, in order to enable the transducer core 200 of this application to be electrically connected to an external processing device, the transducer core 200 may also include a conductive portion 230. One end of the conductive portion 230 is connected to the piezoelectric portion 210, and the other end of the conductive portion 230 can pass through the mounting port 120 to the outside of the housing 100. In this way, the two ends of the conductive portion 230 can be electrically connected to the voltage portion and the processing device outside the housing 100, respectively. After the piezoelectric portion 210 converts the ultrasonic signal into an electrical signal, it can be conducted to the external processing device through the conductive portion 230.

[0059] Furthermore, by electrically connecting the conductive part 230 to the external processing device through the mounting port 120 of the housing 100, it is not necessary to additionally open an opening on the housing 100 for the conductive part 230 to pass through to the outside of the housing 100. This reduces the number of openings on the surface of the housing 100, lowers the manufacturing cost of the housing 100, and improves the structural stability and reliability of the housing 100.

[0060] In some implementations, reference Figure 1 and Figure 3As shown, to improve the fixing effect between the backing 220 and the main body 310, a mounting groove is provided on the side of the main body 310 facing the backing 220, and the side of the backing 220 facing away from the piezoelectric part 210 is embedded in the mounting groove. Specifically, the groove shape and size of the mounting groove on the side of the main body 310 facing the backing 220 are the same as the side of the backing 220 facing away from the piezoelectric part 210. This allows the inner wall of the mounting groove to limit the backing 220 in a direction perpendicular to the direction from the backing 220 to the main body 310 when the side of the backing 220 facing away from the piezoelectric part 210 is embedded in the mounting groove, thereby making the connection between the main body 310 and the backing 220 more stable.

[0061] In some embodiments, in order to make the connection between the main body 310 and the backing 220 more stable and reliable, the ultrasonic transducer of this application may also include a connecting part 400, which is connected to both the main body 310 and the backing 220, thereby fixing the main body 310 and the backing 220 together through the connecting part 400.

[0062] The main body 310 includes a first cavity 311, which is a hollow structure within the main body 310. The backing 220 includes a connecting cavity 221, which is also a hollow structure within the backing 220. The first cavity 311 communicates with the connecting cavity 221, and a connecting part 400 is disposed within both the first cavity 311 and the connecting cavity 221, and the connecting part 400 is connected to both the main body 310 and the backing 220.

[0063] Specifically, the first cavity 311 may be located on the side of the main body 310 adjacent to the backing 220, and one end of the first cavity 311 extends to the side of the main body 310 adjacent to the backing 220, thereby forming an opening communicating with the first cavity 311 on the side of the main body 310 adjacent to the backing 220. One end of the connecting cavity 221 extends to the side of the backing 220 adjacent to the main body 310, thereby forming an opening communicating with the connecting cavity 221 on the side of the backing 220 adjacent to the main body 310. Part of the connecting portion 400 is located inside the first cavity 311, and another part of the connecting portion 400 is located inside the connecting cavity 221. The portion of the connecting portion 400 inside the first cavity 311 may be connected to the inner wall of the first cavity 311, and the portion of the connecting portion 400 inside the connecting cavity 221 may be connected to the inner wall of the connecting cavity 221, thereby making the connecting portion 400 fixedly connected to both the main body 310 and the backing 220.

[0064] The connecting part 400 can be glued, so that the connecting part 400 can be connected to the main body 310 and the backing 220 by adhesive bonding, making the way the connecting part 400 connects the main body 310 and the backing 220 simple and convenient.

[0065] In some implementations, reference Figure 1 and Figure 3 As shown, to facilitate the removal and installation of the fastener 300 from the housing 100, a portion of the fastener 300 may be located outside the cavity 110 of the housing 100. This allows for easy application of force to the fastener 300, enabling convenient removal and installation from within the housing 100. Specifically, the side of the main body 310 facing away from the backing 220 may pass through the mounting opening 120 of the housing 100 to the outside of the housing 100, thus placing a portion of the main body 310 outside the housing 100.

[0066] To allow the end of the conductive portion 230 facing away from the piezoelectric portion 210 to extend outside the housing 100 and electrically connect with an external processing device, the main body 310 also includes a second cavity 312. One end of the second cavity 312 is connected to the first cavity 311, and the other end of the second cavity 312 extends to the surface of the main body 310 and is located outside the housing 100, thereby allowing the opening at the end of the second cavity 312 outside the housing 100 to communicate with the outside of the housing 100. The section of the conductive portion 230 facing away from the piezoelectric portion 210 can sequentially pass through the connecting cavity 221, the first cavity 311, and the second cavity 312 to the outside of the housing 100, allowing the conductive portion 230 to electrically connect with the processing device outside the housing 100. Specifically, the conductive portion 230 can pass through the connecting portion 400 in the connecting cavity 221 and the connecting portion 400 in the first cavity 311 before extending to the second cavity 312, and finally exiting from the second cavity 312 to the outside of the housing 100.

[0067] The fastener 300 may also include a sealing portion 330. The portion of the main body 310 that passes through the mounting opening 120 of the housing 100 can block the mounting opening 120. The sealing portion 330 is disposed within the second cavity 312, and can block the second cavity 312, thereby preventing the second cavity 312 from communicating with the outside of the housing 100, and consequently preventing the cavity 110 of the housing 100 from communicating with the outside of the housing 100. The conductive portion 230 can pass through the sealing portion 330 and extend to the outside of the housing 100.

[0068] Specifically, the outer diameter of the portion of the main body 310 located at the mounting opening 120 of the housing 100 can be set to match the inner diameter of the mounting opening 120, and the outer side wall of the main body 310 can fit in circumferential direction with the inner diameter of the housing 100 adjacent to the mounting opening 120, thereby making the main body 310 block the mounting opening 120.

[0069] In manufacturing the ultrasonic transducer of this application, the side of the backing 220 facing away from the piezoelectric part 210 is first aligned with the mounting groove of the main body 310. Then, potting compound is injected into the first cavity 311 and the connecting cavity 221 through the second cavity 312, so that the potting compound fills the first cavity 311 and the connecting cavity 221 to form the connecting part 400. The connecting part 400 can partially cover the conductive part 230, so that the connecting part 400 can not only connect the main body 310 and the backing 220, but also fix the conductive part 230. Afterwards, the integral structure formed by connecting the main body 310 and the transducer core 200 can be inserted into the cavity 110 of the housing 100 through the mounting port 120, and the portion of the main body 310 passing through the mounting port 120 seals the mounting port 120. Finally, a sealing part 330 is formed by injecting glue into the second cavity 312. The sealing part 330 can seal the second cavity 312, so that the transducer core 200 can be sealed in the cavity 110 of the housing 100.

[0070] In some embodiments, the sealing portion 330 of this application may also adopt a potting structure, in which liquid sealing portion 330 is injected into the second cavity 312, and after the sealing portion 330 solidifies, the second cavity 312 can be sealed. The use of potting structures for both the sealing portion 330 and the connecting portion 400 can reduce the manufacturing cost of the super-energy transducer of this application.

[0071] In some implementations, reference Figure 1 As shown, to improve the detection performance of the ultrasonic transducer of this application, the ultrasonic transducer may further include a dielectric layer. The transducer core 200 includes a coupling surface facing the bottom wall of the cavity 110, with at least a portion of the coupling surface having a gap with the inner wall of the cavity 110 to form a coupling cavity 111. The transducer core 200 also has a first filling surface facing the side wall of the cavity 110, with at least a portion of the first filling surface having a gap with the inner wall of the cavity 110 to form a first filling cavity 113. The fixing member 300 includes a second filling surface facing the inner wall of the cavity 110, with at least a portion of the second filling surface having a gap with the inner wall of the cavity 110 to form a second filling cavity 112. The dielectric layer fills the coupling cavity 111, the first filling cavity 113, and the second filling cavity 112. The dielectric layer is liquid, and the liquid dielectric layer is located between the housing 100 and the fixing member 300, and between the housing 100 and the transducer core 200. When the shell 100 generates noise waves due to aftershocks, the dielectric layer can absorb the noise waves brought by the aftershocks of the shell 100 to a certain extent, which can improve the signal-to-noise ratio of the ultrasonic transducer of this application and improve the detection accuracy.

[0072] Specifically, in the transducer core 200, the side of the matching part 240 facing the bottom wall is the coupling surface, and the surface of the backing 220 facing the inner wall of the cavity 110 is the first filling surface. This allows for a dielectric layer between the matching part 240 and the inner wall of the cavity 110 of the housing 100, and also between the backing 220 and the inner wall of the cavity 110 of the housing 100. The portion of the main body 310 located within the cavity 110 of the housing 100 may include a second filling surface, allowing for a dielectric layer between the main body 310 and the inner wall of the cavity 110. This also unifies the dielectric between the fixing member 300 and the housing 100, as well as the dielectric between the transducer core 200 and the housing 100, resulting in a uniform coefficient of thermal expansion for the dielectric layer within the housing 100, ultimately further improving the detection accuracy of the ultrasonic transducer of this application.

[0073] In some implementations, reference Figure 1 As shown, to facilitate the injection of a medium layer into the coupling cavity 111 and the second filling cavity 112 within the housing 100, the second filling cavity 112 can be connected to the second cavity 312 of the main body 310. The second filling cavity 112 is also connected to the first filling cavity 113, which in turn is connected to the coupling cavity 111. Thus, when it is necessary to inject a medium layer into the coupling cavity 111, the first filling cavity 113, and the second filling cavity 112, the medium layer can be continuously injected into the second cavity 312 first. Under pressure, the medium layer can flow to the second filling cavity 112, and then to the first filling cavity 113 and the coupling cavity 111. Once the coupling cavity 111, the first filling cavity 113, the second filling cavity 112, and the second cavity 312 are filled with the medium layer, the injection can be stopped.

[0074] Specifically, when manufacturing the ultrasonic transducer of this application, even after the main body 310 and the transducer core 200 have been installed in the housing 100 and before the sealing part 330 is provided at the second cavity 312, a dielectric layer can be injected into the second cavity 312 through the opening communicating with the outside of the housing 100. After the coupling cavity 111, the second filling cavity 112, and the second cavity 312 are filled with the dielectric layer, the sealing part 330 can be provided to seal the second cavity 312, thereby sealing the dielectric layer within the second cavity 312, the coupling cavity 111, the first filling cavity 113, and the second filling cavity 112.

[0075] In some implementations, reference Figure 1 , Figure 3 and Figure 5As shown, in order to enable the second filling cavity 112 to communicate with the second cavity 312, an injection hole 313 can be provided on the side wall of the main body 310. The two ends of the injection hole 313 are respectively connected to the second cavity 312 and the second filling cavity 112. In this way, the medium layer injected into the second cavity 312 can flow through the injection hole 313 to the second filling cavity 112, and then to the first filling cavity 113 and the coupling cavity 111.

[0076] The number of injection holes 313 can be set to multiple, and the multiple injection holes 313 can be arranged at intervals along the circumference of the main body 310. The second filling cavity 112 can also be arranged along the circumference of the main body 310, so that the multiple injection holes 313 can be connected to the second filling cavity 112.

[0077] In some embodiments, the dielectric layer in this application may be at least one of silicone oil and castor oil.

[0078] In some implementations, reference Figure 1 , Figure 3 and Figure 5 As shown, to enable the fixing part 320 to be fixedly connected to the housing 100, the fixing part 320 can be configured to be sleeved on the main body part 310, and the fixing part 320 is located inside the cavity 110, with the fixing part 320 threadedly connected to the inner wall of the cavity 110. Specifically, the surface of the fixing part 320 may be provided with external threads, and the inner wall of the cavity 110 may be provided with internal threads. By rotating the main body part 310, the fixing part 320 can be threadedly connected to the inner wall of the cavity 110, thereby fixing the fixing member 300 to the housing 100. When it is necessary to remove the fixing member 300, the fixing member 300 can be moved out of the housing 100 by reversing the main body part 310.

[0079] Based on the ultrasonic transducer described above, this application also proposes an ultrasonic flow meter, including the ultrasonic transducer described above.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An ultrasonic transducer, characterized in that, include: The housing (100) has a cavity (110); A transducer core (200), at least a portion of which is disposed within the cavity (110); The fastener (300) includes a main body (310) and a fixing part (320). At least a portion of the main body (310) is disposed within the cavity (110). The main body (310) applies a force to the transducer core (200) toward the bottom wall of the cavity (110). The fixing part (320) is connected to the housing (100). The main body (310) and the fixing part (320) are an integral structure.

2. The ultrasonic transducer according to claim 1, characterized in that, The housing (100) also has a mounting port (120) that communicates with the cavity (110). The cavity (110) has a bottom wall opposite to the mounting port (120). One side of the transducer core (200) abuts against the bottom wall. At least a portion of the main body (310) is located between the mounting port (120) and the bottom wall. The main body (310) and the transducer core (200) are in upper limit engagement in the direction from the bottom wall to the mounting port (120). The fixing member (300) seals the mounting port (120).

3. The ultrasonic transducer according to claim 2, characterized in that, The transducer core (200) includes a piezoelectric part (210), a backing (220), and a matching part (240). The matching part (240) is disposed on the bottom wall. The piezoelectric part (210) is disposed on the side of the matching part (240) facing away from the bottom wall. The backing (220) is connected to the side of the piezoelectric part (210) facing away from the bottom wall. The main body (310) abuts against the side of the backing (220) facing away from the piezoelectric part (210).

4. The ultrasonic transducer according to claim 3, characterized in that, The transducer core (200) also includes a conductive part (230), one end of which is connected to the piezoelectric part (210), and the other end of which passes through the mounting port (120) to the outside of the housing (100).

5. The ultrasonic transducer according to claim 4, characterized in that, The ultrasonic transducer further includes a connecting part (400), the main body (310) includes a first cavity (311), the backing (220) includes a connecting cavity (221), the first cavity (311) communicates with the connecting cavity (221), the connecting part (400) is disposed between the first cavity (311) and the connecting cavity (221), and the connecting part (400) is connected to both the main body (310) and the backing (220).

6. The ultrasonic transducer according to claim 5, characterized in that, The fastener (300) further includes a sealing part (330). The main body (310) extends through the mounting port (120) to the outside of the housing (100) on the side opposite to the backing (220). The main body (310) also includes a second cavity (312). One end of the second cavity (312) is connected to the first cavity (311). An opening is provided on the surface of the main body (310) to connect to the other end of the second cavity (312). The main body (310) blocks the mounting port (120), and the sealing part (330) blocks the second cavity (312).

7. The ultrasonic transducer according to claim 6, characterized in that, The conductive part (230) passes through the connecting cavity (221), the first cavity (311) and the second cavity (312) in sequence to the outside of the housing (100) at the end opposite to the piezoelectric part (210). The sealing part (330) and the connecting part (400) are both potted with glue. The connecting part (400) fills the first cavity (311) and the connecting cavity (221).

8. The ultrasonic transducer according to claim 6 or 7, characterized in that, The ultrasonic transducer further includes a dielectric layer. The transducer core (200) includes a coupling surface facing the bottom wall of the cavity (110) and a first filling surface facing the side wall of the cavity (110). At least a portion of the coupling surface has a gap with the bottom wall of the cavity (110) to form a coupling cavity (111). At least a portion of the first filling surface has a gap with the side wall of the cavity (110) to form a first filling cavity (113). The fixing member (300) includes a second filling surface facing the inner wall of the cavity (110). At least a portion of the second filling surface has a gap with the inner wall of the cavity (110) to form a second filling cavity (112). The dielectric layer fills the coupling cavity (111), the first filling cavity (113), and the second filling cavity (112). The dielectric layer is liquid.

9. The ultrasonic transducer according to claim 8, characterized in that, The coupling cavity (111) is connected to the second filling cavity (112), the second filling cavity (112) is connected to the second cavity (312), and the dielectric layer is also filled in the second cavity (312); The main body (310) has an injection hole (313) on its side wall, and the injection hole (313) connects the second cavity (312) and the second filling cavity (112).

10. An ultrasonic flow meter, characterized in that, Includes the ultrasonic transducer as described in any one of claims 1-9.

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