Ultrasonic transducer and ultrasonic flowmeter

Abstract

The utility model provides an ultrasonic transducer and an ultrasonic flowmeter, and relates to the technical field of flowmeters. The ultrasonic transducer comprises a shell, a transducer core body and a connecting assembly, the shell is provided with a device cavity, the transducer core body is placed in the device cavity, and one end of the transducer core body is bonded with the bottom wall of the device cavity through bonding glue; one part of the connecting assembly extends into the device cavity and is connected with the other end of the transducer core body, the part, extending into the shell, of the connecting assembly is provided with a first connecting structure, the shell is provided with a second connecting structure, and the shell is detachably connected with the connecting assembly through the first connecting structure and the second connecting structure; the part, located outside the shell, of the connecting assembly is provided with a third connecting structure, and the third connecting structure is used for detaching at least part of the connecting assembly from the shell. The ultrasonic transducer can be conveniently assembled, disassembled and maintained, and the maintenance cost is reduced.

Description

Technical Field

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

[0002] An ultrasonic flow meter is a non-contact flow meter that uses ultrasonic waves to detect the flow velocity information in a fluid to measure the flow rate. Ultrasonic flow meters are widely used in industries such as industry and medicine due to their advantages such as good stability, high measurement accuracy, wide range, low maintenance rate, and low pressure loss.

[0003] The ultrasonic transducer, as the core component of the ultrasonic flow meter, affects its performance. Existing ultrasonic transducers typically have good sealing performance, making disassembly and maintenance inconvenient. Utility Model Content

[0004] This application provides an ultrasonic transducer and an ultrasonic flow meter to solve the problem that existing ultrasonic transducers are inconvenient to disassemble and maintain.

[0005] This application provides an ultrasonic transducer for use in an ultrasonic flow meter, the ultrasonic transducer comprising:

[0006] The device comprises a housing, a transducer core, and a connecting assembly. The housing has a device cavity, and the transducer core is placed inside the device cavity, with one end of the transducer core bonded to the bottom wall of the device cavity by adhesive. A portion of the connecting assembly extends into the device cavity and is connected to the other end of the transducer core. The portion of the connecting assembly extending into the housing has a first connecting structure, and the housing has a second connecting structure. The housing and the connecting assembly are detachably connected through the first and second connecting structures. The portion of the connecting assembly located outside the housing has a third connecting structure, which is used to detach at least a portion of the connecting assembly from the housing.

[0007] In one possible implementation, the connection component includes:

[0008] The connecting rod and the connecting tail tube are provided. One end of the connecting rod abuts against the end of the transducer core away from the bottom wall of the device cavity, and the other end of the connecting rod is detachably connected to the connecting tail tube. The first connecting structure and the third connecting structure are both provided on the connecting tail tube.

[0009] In one possible implementation, the portion of the connecting tail tube located outside the housing is provided with a first external thread, and the third connecting structure is the first external thread. The first external thread can be threadedly connected to a disassembly tool to detach the connecting tail tube from the housing.

[0010] In one possible implementation, the portion of the connecting tail tube located inside the housing is provided with a second external thread, the first connecting structure is the second external thread, the inner wall of the housing is provided with a first internal thread, the second connecting structure is the first internal thread, and the connecting tail tube and the housing are threadedly connected by the second external thread and the first internal thread.

[0011] In one possible implementation, the first external thread and the second external thread have opposite thread directions.

[0012] In one possible implementation, both the second external thread and the first internal thread are coated with threadlocker.

[0013] In one possible implementation, the transducer core includes:

[0014] The device comprises a matching layer, a piezoelectric element, and a sound-absorbing backing. One end of the matching layer is bonded to the bottom wall of the device cavity with adhesive. The other end of the matching layer is bonded to one end of the piezoelectric element. The other end of the piezoelectric element is bonded to one end of the sound-absorbing backing. The other end of the sound-absorbing backing is connected to the connecting assembly.

[0015] In one possible implementation, the ultrasonic transducer operates in a frequency range of 150 kHz to 400 kHz.

[0016] In one possible implementation, the outer contour of the ultrasonic transducer's orthographic projection along its length is circular, and the diameter of the circle ranges from 8 mm to 15 mm.

[0017] This application also provides an ultrasonic flow meter, including the ultrasonic transducer described in any of the above claims.

[0018] This application provides an ultrasonic transducer and an ultrasonic flow meter. The ultrasonic transducer includes a housing, a transducer core, and a connecting assembly. The housing has a cavity, and the transducer core is placed inside the cavity. One end of the transducer core is bonded to the bottom wall of the cavity with adhesive. A portion of the connecting assembly extends into the cavity and connects to the other end of the transducer core. The portion of the connecting assembly extending into the housing has a first connecting structure, and the housing has a second connecting structure. The housing and the connecting assembly are detachably connected through the first and second connecting structures. The detachable connection between the connecting assembly and the housing facilitates the assembly, disassembly, and maintenance of the ultrasonic transducer, reducing maintenance costs. The portion of the connecting assembly outside the housing has a third connecting structure for detaching at least a portion of the connecting assembly from the housing. This allows for quick detachment of at least a portion of the connecting assembly from the housing, facilitating replacement and maintenance of the connecting assembly or the transducer core, thus solving the problem of inconvenient disassembly and maintenance in existing ultrasonic transducers. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] Figure 1 This is an exploded view of an ultrasonic transducer provided in one embodiment of this application;

[0021] Figure 2 This is a cross-sectional schematic diagram of an ultrasonic transducer provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the installation of an ultrasonic flow meter and an ultrasonic transducer according to an embodiment of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 11-Housing shell; 111-Device cavity;

[0025] 12-Transducer core; 121-Matching layer; 122-Piezoelectric element; 123-Sound-absorbing backing; 1231-First through hole;

[0026] 13-Connecting assembly; 131-Connecting rod; 1311-Third external thread; 1312-Second through hole; 132-Connecting tail tube; 1321-First connecting structure; 1322-Third connecting structure; 133-Connecting spring;

[0027] 100 - Ultrasonic transducer; 200 - Pipeline.

[0028] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the embodiments of this application.

[0030] In the embodiments of this application, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation. Furthermore, some of the above terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this application according to the specific circumstances.

[0031] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0032] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0033] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in a sequence other than those illustrated or described herein.

[0034] In this application, the terms "exemplarily" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplarily" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0035] Unless otherwise stated, the term "multiple" means two or more.

[0036] As described in the background section, ultrasonic flow meters are currently the most promising new type of electronic flow meter. They are non-contact flow meters that use ultrasonic waves to detect the velocity information in a fluid to measure flow rate. Ultrasonic flow meters are widely used in industries such as industry and medicine due to their advantages of non-contact measurement, no requirements on the fluid medium, and high measurement accuracy. Among these components, the ultrasonic transducer, as the core component of the ultrasonic flow meter, affects its performance.

[0037] To ensure good sealing, existing ultrasonic transducers typically employ complex fastening methods between various components to maximize the sealing effect. However, this also makes the ultrasonic transducers difficult to disassemble and repair, thereby increasing the replacement and maintenance costs.

[0038] Therefore, in order to solve the technical problems of the prior art, the ultrasonic transducer housing and the connecting assembly should be detachably connected to facilitate the rapid assembly, disassembly and replacement of internal components of the ultrasonic transducer. Furthermore, a structure for separating the connecting assembly from the housing should be provided on the connecting assembly, so that at least part of the connecting assembly can be quickly separated from the housing, thereby reducing the replacement and maintenance costs of the ultrasonic transducer.

[0039] The technical solutions of the embodiments of this application and how the technical solutions of the embodiments of this application solve the above-mentioned technical problems are described in detail below with specific examples. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will be described below with reference to the accompanying drawings.

[0040] Figure 1 This is an exploded view of an ultrasonic transducer provided in one embodiment of this application. Figure 2 This is a schematic cross-sectional view of an ultrasonic transducer provided in an embodiment of this application. (Refer to...) Figure 1 and Figure 2 As shown, this application provides an ultrasonic transducer for use in an ultrasonic flow meter. The ultrasonic transducer includes: a housing 11, a transducer core 12, and a connecting assembly 13. The housing 11 has a device cavity 111, and the transducer core 12 is placed inside the device cavity 111. One end of the transducer core 12 is bonded to the bottom wall of the device cavity 111 by adhesive. A portion of the connecting assembly 13 extends into the device cavity 111 and is connected to the other end of the transducer core 12. The portion of the connecting assembly 13 extending into the housing 11 is provided with a first connecting structure 1321, and the housing 11 is provided with a second connecting structure. The housing 11 and the connecting assembly 13 are detachably connected through the first connecting structure 1321 and the second connecting structure. The portion of the connecting assembly 13 located outside the housing 11 is provided with a third connecting structure 1322, which is used to detach at least a portion of the connecting assembly 13 from the housing 11.

[0041] The housing 11 is the main structure of the ultrasonic transducer. The housing 11 is provided with a device cavity 111 for accommodating the transducer core 12 and part of the connecting components 13. Thus, the housing 11 can protect the internal transducer core 12 and connecting components 13 from interference or damage from the external environment.

[0042] Optionally, the housing 11 is made of a metal alloy. Metal alloys have high strength and hardness, which can prevent the housing 11 from easily deforming or being damaged.

[0043] The transducer core 12 is the core component of the ultrasonic transducer, used to convert electrical energy into ultrasonic vibration energy, or vice versa. One end of the transducer core 12 is bonded to the bottom wall of the device cavity 111 with adhesive, thereby enabling quick connection between the transducer core 12 and the housing 11, ensuring effective connection between the transducer core 12 and the housing 11, ensuring effective transmission of sound waves, and ensuring the durability and reliability of the ultrasonic transducer.

[0044] Specifically, the connecting component 13 has two main functions:

[0045] Firstly, a portion of the connecting assembly 13 extends into the device cavity 111 and connects to the transducer core 12. The connecting assembly 13 is also detachably connected to the housing 11 via the first connecting structure 1321. Thus, the transducer core 12 is stably fixed within the housing 11 by the cooperation of the connecting assembly 13 and the housing 11, ensuring the working state of the transducer core 12. By detachably connecting the connecting assembly 13 to the housing 11, when the ultrasonic transducer malfunctions, it is only necessary to separate the connecting assembly 13 from the housing 11 and replace the faulty component. Therefore, the detachable connection between the connecting assembly 13 and the housing 11 facilitates the assembly, disassembly, and maintenance of the ultrasonic transducer.

[0046] Secondly, the connecting component 13 is also provided with a third connecting structure 1322. The third connecting structure 1322 is used to detach at least part of the connecting component 13 from the housing 11. Thus, after the ultrasonic transducer is installed and fixed to the ultrasonic flow meter, the third connecting structure 1322 can be used in conjunction with a disassembly tool to quickly separate at least part of the connecting component 13 from the housing 11, so as to replace at least part of the connecting component 13 or the transducer core 12 without disassembling the housing 11 from the ultrasonic flow meter, thereby reducing the difficulty of replacing and maintaining the ultrasonic transducer.

[0047] Optionally, the connection method of the first connection structure 1321 and the second connection structure can be selected in a variety of ways, such as threaded connection, snap-fit ​​connection or plug-in connection.

[0048] Optionally, the third connection structure 1322 can also be selected from various options, such as a threaded interface or a prismatic interface, to facilitate the connection of the third connection structure 1322 with the disassembly tool. Thus, by using the disassembly tool in conjunction with the third connection structure 1322, the connection assembly 13 can be easily disassembled or installed from the housing 11, facilitating the maintenance and replacement of the ultrasonic transducer.

[0049] Specifically, when assembling the ultrasonic transducer, firstly, adhesive is applied to one end of the transducer core 12 or the bottom wall of the device cavity 111. Then, the transducer core 12, or the transducer core 12 connected to one end of the connecting assembly 13, is placed inside the device cavity 111. Next, the connecting assembly 13 is detachably connected to the housing 11 via the first connecting structure 1321 of the connecting assembly 13 and the second connecting structure of the housing 11, thus completing the assembly of the ultrasonic transducer. After the ultrasonic transducer is installed on the ultrasonic flow meter, if a damaged connecting assembly 13 or transducer core 12 needs to be replaced, a disassembly tool is used in conjunction with the third connecting structure 1322 to detach at least part of the connecting assembly 13 from the housing 11. After repairing or replacing the damaged part, the connecting assembly 13 is then reconnected to the housing 11 using the disassembly tool in conjunction with the third connecting structure 1322. During this process, it is not necessary to detach the housing 11 from the ultrasonic flow meter, reducing the difficulty of repairing and replacing the ultrasonic transducer.

[0050] The ultrasonic transducer provided in this embodiment achieves a detachable connection between the connecting component 13 and the housing 11 through the first connecting structure 1321 and the second connecting structure, which facilitates the assembly, disassembly and maintenance of the ultrasonic transducer and reduces maintenance costs. The third connecting structure 1322 enables the quick disassembly of at least part of the connecting component 13 from the housing 11, so that the components of the ultrasonic transducer can be replaced or repaired without separating the housing 11 from the ultrasonic flow meter, which reduces the difficulty of disassembling and repairing the ultrasonic transducer.

[0051] refer to Figure 1 and Figure 2 As shown, in an optional embodiment, the connecting assembly 13 includes a connecting rod 131 and a connecting tail tube 132. One end of the connecting rod 131 abuts against the end of the transducer core 12 away from the bottom wall of the device cavity 111, and the other end of the connecting rod 131 is detachably connected to the connecting tail tube 132. The first connecting structure 1321 and the third connecting structure 1322 are both disposed on the connecting tail tube 132.

[0052] Specifically, in this embodiment, the connecting assembly 13 includes a connecting rod 131 and a connecting tail tube 132. One end of the connecting rod 131 abuts against the transducer core 12, and the other end is detachably connected to the connecting tail tube 132. Thus, the connecting rod 131 restricts the position of the transducer core 12 and ensures the stable working state of the transducer core 12. The first connecting structure 1321 and the third connecting structure 1322 are both disposed on the connecting tail tube 132, so that the main function of the connecting tail tube 132 is to connect or disconnect from the housing 11.

[0053] It should be noted that in this embodiment, the connecting component 13 is set as a combination of connecting rod 131 and connecting tail tube 132, so that connecting rod 131 and connecting tail tube 132 have different functions, and connecting rod 131 and connecting tail tube 132 are detachably connected, so that the connecting component 13 can be easily disassembled and replaced when needed, which can reduce the difficulty of integrally processing the connecting component 13.

[0054] Optionally, both the connecting rod 131 and the connecting tail tube 132 are made of metal or metal alloy.

[0055] Optionally, the end of the connecting rod 131 near the connecting tail tube 132 is provided with a third external thread 1311, the connecting tail tube 132 is a hollow tubular structure, the inner wall of the connecting tail tube 132 is provided with a second internal thread, and the connecting rod 131 and the connecting tail tube 132 are threadedly connected by the third external thread 1311 and the second internal thread.

[0056] Optionally, refer to Figure 1 and Figure 2 As shown, the connecting assembly 13 also includes a connecting spring 133. The connecting spring 133 is sleeved on the outer periphery of the connecting rod 131, and one end of the connecting spring 133 can abut against the shoulder of the outer periphery of the connecting rod 131, while the other end of the connecting spring 133 can abut against one end of the connecting tail tube 132. Specifically, during installation, firstly, the connecting spring 133 is sleeved on the outer periphery of the connecting rod 131, then the connecting rod 131 and the connecting spring 133 are placed together into the housing 11, and finally the connecting tail tube 132 is connected to the connecting rod 131. One end of the connecting tail tube 132 can compress the connecting spring 133 to cause it to deform, and the elastic restoring force of the connecting spring 133 will compress the connecting rod 131, so that the connecting rod 131 can press against the transducer core 12, thereby ensuring the stability of the transducer core 12. In addition, the connecting spring 133 can also absorb vibration.

[0057] In an alternative embodiment, reference Figure 1 As shown, the portion of the connecting tail tube 132 located outside the housing 11 is provided with a first external thread, and the third connecting structure 1322 is the first external thread. The first external thread can be threadedly connected with a disassembly tool to detach the connecting tail tube 132 from the housing 11.

[0058] Specifically, in this embodiment, the third connecting structure 1322 on the connecting tailpipe 132 is a first external thread. The function of the first external thread is to connect with the internal thread interface of the disassembly tool. The threaded connection method is not only simple and reliable, but also able to withstand greater tensile force and torque, ensuring the connection stability between the disassembly tool and the connecting tailpipe 132. It should be noted that the threaded connection between the disassembly tool and the connecting tailpipe 132 makes the disassembly process of the connecting tailpipe 132 and the housing 11 much simpler. When separating the connecting tailpipe 132 and the housing 11, first connect the internal thread interface of the disassembly tool with the first external thread of the connecting tailpipe 132. Then, continue to separate the connecting tailpipe 132 from the housing 11 using the disassembly tool. This reduces the difficulty and cost of completely removing the ultrasonic transducer from the ultrasonic flow meter.

[0059] In addition, by setting the first external thread on the part of the connecting tail tube 132 located outside the housing 11, it is possible to avoid the housing 11 interfering with the disassembly tool when connecting the disassembly tool to the first external thread, thus ensuring a smooth connection between the disassembly tool and the first external thread.

[0060] In an alternative embodiment, reference Figure 1 As shown, the portion of the connecting tail tube 132 located inside the housing 11 is provided with a second external thread, the first connecting structure 1321 is a second external thread, the inner wall of the housing 11 is provided with a first internal thread, the second connecting structure is a first internal thread, and the connecting tail tube 132 and the housing 11 are threadedly connected by the second external thread and the first internal thread.

[0061] Specifically, in this embodiment, the first connecting structure 1321 of the connecting tail tube 132 is a second external thread, and the second connecting structure of the housing 11 is a first internal thread. Through the cooperation of the second external thread and the first internal thread, a stable mechanical connection can be formed between the connecting tail tube 132 and the housing 11.

[0062] It should be noted that the threaded connection not only ensures the stability of the connection between the tailpipe 132 and the housing 11, but also prevents leakage of fluid or other media inside the housing 11, thus playing a sealing role. In addition, the installation and disassembly process of the threaded connection is relatively simple, requiring no special tools, which reduces maintenance costs and time.

[0063] In an alternative embodiment, the first external thread and the second external thread have opposite thread directions.

[0064] Specifically, since the disassembly tool and the connecting tail tube 132, as well as the connecting tail tube 132 and the housing 11, are all threadedly connected, in order to successfully separate the connecting tail tube 132 from the housing 11, the first external thread and the second external thread are set to rotate in opposite directions. Thus, after the disassembly tool and the connecting tail tube 132 are connected in place, the disassembly tool is continued to be turned in the same direction, thereby gradually separating the connecting tail tube 132 from the housing 11.

[0065] In an alternative embodiment, both the second external thread and the first internal thread are coated with threadlocker.

[0066] Specifically, in this embodiment, threadlocker is applied to both the second external thread and the first internal thread. The threadlocker can fill the tiny gaps between the threads, forming a dense sealing layer that effectively prevents impurities such as fluids, gases, or dust from entering the connection. After curing, the threadlocker has a certain adhesive force, which can tightly bond the threaded connection together, enhancing the stability of the connection. The threadlocker also has anti-corrosion and anti-rust properties, which can protect the threaded connection from external environmental erosion and extend the service life of the connection component 13.

[0067] In an alternative embodiment, reference Figure 1 and Figure 2 As shown, the transducer core 12 includes a matching layer 121, a piezoelectric element 122, and a sound-absorbing backing 123. One end of the matching layer 121 is bonded to the bottom wall of the device cavity 111 by adhesive. The other end of the matching layer 121 is bonded to one end of the piezoelectric element 122. The other end of the piezoelectric element 122 is bonded to one end of the sound-absorbing backing 123. The other end of the sound-absorbing backing 123 is connected to the connecting assembly 13.

[0068] Specifically, in this embodiment, the transducer core 12 includes a matching layer 121, a piezoelectric element 122, and a sound-absorbing backing 123, and the matching layer 121, the piezoelectric element 122, and the sound-absorbing backing 123 are sequentially bonded and fixed to achieve the transmission and reception of ultrasonic signals.

[0069] The main function of the matching layer 121 is to act as a transition layer for the ultrasonic signal from the fluid medium to the piezoelectric element 122, reducing signal reflection and loss during propagation and improving signal transmission efficiency. Optionally, the matching layer 121 is made of ceramic material. Specifically, one end of the matching layer 121 is tightly bonded to the bottom wall of the device cavity 111 with adhesive to ensure that the signal can be smoothly transmitted into the fluid medium, while the other end is bonded to one end of the piezoelectric element 122 to form a tight acoustic coupling.

[0070] The piezoelectric element 122 is the core component of the transducer core 12, used to convert electrical signals into ultrasonic signals, or vice versa. Optionally, the piezoelectric element 122 is made of piezoelectric ceramic. One end of the piezoelectric element 122 is bonded to the matching layer 121, and the other end is bonded to the sound-absorbing backing 123, so that the piezoelectric element 122 can be supported and protected by the matching layer 121 and the sound-absorbing backing 123, while achieving smooth signal transmission.

[0071] The primary function of the sound-absorbing backing 123 is to absorb ultrasonic signals transmitted from the back of the piezoelectric element 122, preventing signal reflection and interference within the housing 11, and improving signal purity and measurement accuracy. Optionally, the material of the sound-absorbing backing 123 may be rubber or foam plastic. Specifically, one end of the sound-absorbing backing 123 is bonded to the piezoelectric element 122, and the other end is connected to the connecting assembly 13. Furthermore, the sound-absorbing backing 123 is bonded to the connecting assembly 13. This allows the sound-absorbing backing 123 to effectively absorb signals transmitted from the back of the piezoelectric element 122 and convert them into other forms of energy.

[0072] Optionally, the piezoelectric element 122 is also connected to a positive wire and a negative wire, which are used for the transmission of electrical signals; Reference Figure 2 As shown, the sound-absorbing backing 123 has a first through hole 1231 penetrating the body, the connecting rod 131 has a second through hole 1312 penetrating the body, and the connecting tail tube 132 is a hollow tubular structure; therefore, the positive electrode wire and the negative electrode wire can pass through the first through hole 1231, the second through hole 1312 and the connecting tail tube 132 in sequence and extend to the outside of the ultrasonic transducer.

[0073] In one alternative embodiment, the ultrasonic transducer operates in a frequency range of 150 kHz to 400 kHz.

[0074] It should be noted that in fluid media, the wavelength of ultrasound is inversely proportional to its frequency. In the lower frequency range, the wavelength of ultrasound is longer, resulting in better penetration and propagation distance. Ultrasonic signals can penetrate the fluid medium more easily, especially in fluids containing particles, bubbles, or high viscosity. As the frequency increases, the attenuation and scattering of ultrasound in the fluid medium also increase. In the higher frequency range, although the signal resolution and measurement accuracy may improve, signal attenuation and scattering will also intensify, thus affecting the signal transmission distance and measurement accuracy. Therefore, in this embodiment, the operating frequency range of the ultrasonic transducer is set to 150kHz to 400kHz. This ultrasonic transducer can be applied to scenarios such as flow measurement, liquid level measurement, and concentration measurement, demonstrating strong applicability.

[0075] Optionally, the operating frequency of the ultrasonic transducer can be 150kHz, 200kHz, 250kHz, 300kHz, 350kHz, or 400kHz. Specifically, in this embodiment, the specific operating frequency of the ultrasonic transducer is not limited.

[0076] Specifically, the operating frequency of the ultrasonic transducer can be changed by altering the dimensions of the transducer core 12.

[0077] In an alternative embodiment, the outer contour of the ultrasonic transducer's orthographic projection is circular along the length of the ultrasonic transducer, and the diameter of the circle ranges from 8 mm to 15 mm.

[0078] Specifically, designing the outer contour of the ultrasonic transducer as circular allows for a more uniform sound field distribution when transmitting and receiving ultrasonic signals. This helps reduce signal attenuation and scattering during propagation, improving signal propagation efficiency and measurement accuracy. Furthermore, the circular design makes the ultrasonic transducer more compact and easier to install.

[0079] Specifically, the outer diameter of the ultrasonic transducer is set to 8mm to 15mm to achieve a certain degree of standardization and interchangeability in the manufacturing and installation process, and to facilitate the installation of the ultrasonic transducer in the ultrasonic flow meter.

[0080] Optionally, the outer diameter of the ultrasonic transducer can be 8mm, 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, or 15mm. In this embodiment, this dimension is not specifically limited.

[0081] One embodiment of this application also provides an ultrasonic flow meter, including the ultrasonic transducer of any of the above-mentioned embodiments. It should be noted that the working principle of the ultrasonic flow meter is based on the relationship between the propagation speed of ultrasonic signals in a fluid and the fluid flow velocity. Specifically, during operation, the ultrasonic transducer emits an ultrasonic signal, which is received by the ultrasonic transducer at the receiving end after propagating a certain distance in the fluid. By measuring the propagation time or frequency change of the ultrasonic signal, the fluid flow velocity is calculated. The flow rate is then calculated based on the flow velocity and the cross-sectional area of ​​the fluid.

[0082] Figure 3 This is a schematic diagram of the installation of an ultrasonic flow meter and an ultrasonic transducer according to an embodiment of this application, as shown below. Figure 3As shown, specifically in this embodiment, the ultrasonic flow meter includes a pipe 200 that allows fluid to pass through and a plurality of ultrasonic transducers 100. The inner wall of the pipe 200 is provided with mounting holes, so that the housing of the ultrasonic transducer 100 is snapped into or inserted into the mounting holes to realize the installation connection between the ultrasonic transducer 100 and the ultrasonic flow meter.

[0083] More specifically, in this embodiment, six pairs of ultrasonic transducers 100 are installed on the pipe 200 of the ultrasonic flow meter. Each pair of ultrasonic transducers 100 is arranged in a counter-current manner to form a sound channel. Thus, the ultrasonic flow meter is a six-channel ultrasonic flow meter. The six-channel arrangement can reduce the sensitivity of the ultrasonic flow meter to flow field fluctuations and can effectively compensate for the influence caused by factors such as non-ideal flow field distribution, thereby reducing the requirements for installation conditions and environment and ensuring its measurement accuracy.

[0084] Other embodiments of the present application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. The embodiments of this application are intended to cover any variations, uses, or adaptations of the embodiments of this application that follow the general principles of the embodiments of this application and include common knowledge or customary technical means in the art not disclosed in the embodiments of this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the embodiments of this application are indicated by the following claims.

[0085] It should be understood that the embodiments of this application are not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from their scope. The scope of the embodiments of this application is limited only by the appended claims.

Claims

1. An ultrasonic transducer, used in an ultrasonic flow meter, characterized in that, include: The device comprises a housing (11), a transducer core (12), and a connecting assembly (13). The housing (11) has a device cavity (111). The transducer core (12) is placed inside the device cavity (111), and one end of the transducer core (12) is bonded to the bottom wall of the device cavity (111) with adhesive. A portion of the connecting assembly (13) extends into the device cavity (111) and is connected to the other end of the transducer core (12). The connecting assembly (13) extends into the housing (111). The inner portion of 11) is provided with a first connecting structure (1321), the housing (11) is provided with a second connecting structure, the housing (11) and the connecting assembly (13) are detachably connected through the first connecting structure (1321) and the second connecting structure; the portion of the connecting assembly (13) located outside the housing (11) is provided with a third connecting structure (1322), the third connecting structure (1322) is used to detach at least a portion of the connecting assembly (13) from the housing (11).

2. The ultrasonic transducer according to claim 1, characterized in that, The connection component (13) includes: A connecting rod (131) and a connecting tail tube (132) are provided. One end of the connecting rod (131) abuts against the end of the transducer core (12) away from the bottom wall of the device cavity (111). The other end of the connecting rod (131) is detachably connected to the connecting tail tube (132). The first connecting structure (1321) and the third connecting structure (1322) are both provided on the connecting tail tube (132).

3. The ultrasonic transducer according to claim 2, characterized in that, The portion of the connecting tail tube (132) located outside the housing (11) is provided with a first external thread, and the third connecting structure (1322) is the first external thread. The first external thread can be threadedly connected with a disassembly tool to detach the connecting tail tube (132) from the housing (11).

4. The ultrasonic transducer according to claim 3, characterized in that, The portion of the connecting tail tube (132) located inside the housing (11) is provided with a second external thread, the first connecting structure (1321) is the second external thread, the inner wall of the housing (11) is provided with a first internal thread, the second connecting structure is the first internal thread, and the connecting tail tube (132) and the housing (11) are threadedly connected by the second external thread and the first internal thread.

5. The ultrasonic transducer according to claim 4, characterized in that, The first external thread and the second external thread have opposite thread directions.

6. The ultrasonic transducer according to claim 4, characterized in that, Both the second external thread and the first internal thread are coated with threadlocker.

7. The ultrasonic transducer according to any one of claims 1-6, characterized in that, The transducer core (12) includes: The device comprises a matching layer (121), a piezoelectric element (122), and a sound-absorbing backing (123). One end of the matching layer (121) is bonded to the bottom wall of the device cavity (111) with adhesive. The other end of the matching layer (121) is bonded to one end of the piezoelectric element (122). The other end of the piezoelectric element (122) is bonded to one end of the sound-absorbing backing (123). The other end of the sound-absorbing backing (123) is connected to the connecting assembly (13).

8. The ultrasonic transducer according to any one of claims 1-6, characterized in that, The ultrasonic transducer operates in a frequency range of 150kHz to 400kHz.

9. The ultrasonic transducer according to any one of claims 1-6, characterized in that, Along the length of the ultrasonic transducer, the outer contour of the orthographic projection of the ultrasonic transducer is circular, and the diameter of the circle ranges from 8 mm to 15 mm.

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

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