Ultrasonic transducer, ultrasonic metering flow channel assembly and ultrasonic gas meter

Abstract

The utility model provides an ultrasonic transducer, an ultrasonic metering flow channel assembly and an ultrasonic gas meter, and particularly relates to the technical field of ultrasonic waves. The ultrasonic transducer comprises a piezoelectric body, a metal piece, an acoustic matching layer and an elastic piece. Wherein the piezoelectric body is located on one side of the metal piece, and the sound matching layer is located on the side, opposite to the piezoelectric body, of the metal piece. The elastic piece wraps the outer edge of the metal piece, at least three concave parts are formed in at least one surface of the elastic piece, and a thickness exists between the surface provided with the concave parts and the outer edge of the metal piece. Therefore, a certain thickness is formed between the surface, provided with the concave part, of the elastic piece and the metal piece, and when a piezoelectric signal vibrates, the contact points on the elastic piece can better absorb the vibration, so that the vibration propagation is inhibited.

Description

Technical Field

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

[0002] An ultrasonic transducer is a device that converts electrical energy into mechanical vibration energy, commonly used in applications such as ultrasonic cleaning, welding, and flaw detection. In gas meters, ultrasonic transducers can be used to measure gas flow rate by emitting and receiving ultrasonic signals. The time difference of ultrasonic waves propagating through the gas can be used to calculate the gas velocity.

[0003] Generally, existing ultrasonic transducers typically consist of a piezoelectric ceramic, a metal shell, an acoustic matching layer, and insulating and vibration-damping components. The ultrasonic transducer has mounting brackets on both sides for securing it. The insulating and vibration-damping components have recesses; the mounting brackets are inserted into these recesses and contact at least a portion of the metal components, thus directly pressing the metal components into the flow path.

[0004] However, the recesses in the insulating vibration damping components typically expose at least a portion of the metal part's surface, causing the mounting bracket to contact the metal part at the opening. Because the mounting bracket is in direct contact with the metal part, the vibrational sound waves from the upstream piezoelectric element are directly transmitted to the downstream ultrasonic transducer via rigid contact components such as the piezoelectric element-metal part-mounted bracket. These vibrational sound waves interfere with the ultrasonic signal propagating within the flow channel, leading to a decrease in signal accuracy. This affects the downstream ultrasonic transducer's ability to identify the valid signal, and in severe cases, can even cause misinterpretations, resulting in measurement errors and impacting the accuracy of ultrasonic measurements. Utility Model Content

[0005] This application provides an ultrasonic transducer, an ultrasonic metering flow channel assembly, and an ultrasonic gas meter. While ensuring the fixed accuracy of the ultrasonic transducer, it reduces vibration propagation during the measurement of the fluid being measured, thereby improving the metering accuracy of the ultrasonic waves.

[0006] In a first aspect, embodiments of this application provide an ultrasonic transducer, comprising:

[0007] piezoelectric elements;

[0008] A metal part, with the piezoelectric element located on one side of the metal part;

[0009] The acoustic matching layer is located on the side of the metal component that faces away from the piezoelectric element.

[0010] Elastic element, the elastic element covers the outer edge of the metal part;

[0011] At least three recesses are formed on at least one surface of the elastic member, and there is a thickness between the surface with the recesses and the outer edge of the metal member.

[0012] The ultrasonic transducer provided in the first aspect of this application includes a piezoelectric element, a metal component, an acoustic matching layer, and an elastic element. The piezoelectric element is located on one side of the metal component, and the acoustic matching layer is located on the side of the metal component facing away from the piezoelectric element. The elastic element covers the outer edge of the metal component, and at least three recesses are formed on at least one surface of the elastic element. A thickness exists between the surface of the elastic element with recesses and the outer edge of the metal component. This provides a certain thickness between the surface of the elastic element with recesses and the metal component, allowing the contact points on the elastic element to effectively absorb vibrations when the piezoelectric element generates a signal, thereby suppressing vibration propagation.

[0013] In one possible implementation, the outer peripheral side of the metal part has an extension, and the elastic member and the extension are in contact;

[0014] The thickness between the surface of the elastic element with the recess and the surface of the extension ranges from 0.1 to 0.5 mm.

[0015] In one possible implementation, the ultrasonic transducer further includes a backing portion, wherein the backing portion and the elastic element are integrally formed.

[0016] The backing covers at least a portion of the piezoelectric material.

[0017] In one possible implementation, the ultrasonic transducer further includes: a signal line, which includes a positive line and a negative line, wherein the positive line is fixedly connected to a piezoelectric element and the negative line is fixedly connected to a metal component.

[0018] The elastic element has two positioning parts on the side facing the signal line, and the two positioning parts are respectively wrapped around one end of the positive line and the negative line.

[0019] Secondly, embodiments of this application provide an ultrasonic metering flow channel assembly, comprising:

[0020] The aforementioned ultrasonic transducer;

[0021] The first support is located on one side of the ultrasonic transducer, and the piezoelectric element of the ultrasonic transducer is positioned facing the first support.

[0022] The second support is located on the other side of the ultrasonic transducer, and the acoustic matching layer of the ultrasonic transducer is positioned facing the second support.

[0023] The flow channel section has at least one flow channel, and a second support is located on the flow channel section. The second support is provided with a through hole through which ultrasonic waves can pass, and the through hole is connected to the flow channel.

[0024] The ultrasonic metering flow channel assembly provided in the second aspect of this application includes an ultrasonic transducer, a first support, a second support, and a flow channel. The first support is located on one side of the ultrasonic transducer, with the piezoelectric element of the ultrasonic transducer facing the first support. The second support is located on the other side of the ultrasonic transducer, with the acoustic matching layer of the ultrasonic transducer facing the second support. The flow channel has at least one flow channel, and the second support is located on the flow channel, with a through-hole allowing ultrasonic waves to pass through, the through-hole communicating with the flow channel. Thus, at the points where the ultrasonic transducer directly contacts the first and second supports, corresponding elastic elements are present. When the piezoelectric element signal generates vibration, the contact point between the first support and the ultrasonic transducer is flexible, effectively absorbing the vibration at the contact point, thereby suppressing the transmission of vibration to the other ultrasonic transducer through the first support. The damping effect of the elastic elements absorbs vibration noise, thereby isolating the ultrasonic transducer from the influence of vibration noise along the transmission path through the second support and the flow channel.

[0025] In one possible implementation, a first limiting part is provided on the side of the first bracket facing the ultrasonic transducer, and the first limiting part protrudes from the first bracket;

[0026] The first limiting part and the recess of the ultrasonic transducer are correspondingly provided, and the first limiting part and the recess of the ultrasonic transducer abut against each other.

[0027] In one possible implementation, a second limiting part is provided on the side of the second bracket facing the ultrasonic transducer, and the second limiting part protrudes from the second bracket;

[0028] The second limiting part abuts against the recess of the ultrasonic transducer.

[0029] In one possible implementation, the first support and the recess of the ultrasonic transducer have a first compression amount, the first compression amount being in the range of 0.1-0.3 mm;

[0030] The second support and the recess of the ultrasonic transducer have a second compression amount, which ranges from 0.1 to 0.3 mm.

[0031] In one possible implementation, the first bracket has a first hook and a second hook disposed opposite to each other at both ends, and both the first hook and the second hook extend toward the second bracket;

[0032] The second bracket has two opposing protrusions that protrude from the second bracket and engage with the first hook and the second hook respectively, so that the first bracket and the second bracket are fixedly connected.

[0033] Thirdly, embodiments of this application provide an ultrasonic gas meter, including the ultrasonic metering flow channel assembly described above.

[0034] It should be understood that the technical solutions of the first, second and third aspects of this application, and the beneficial effects obtained by each aspect and the corresponding feasible implementation are similar, and will not be repeated here.

[0035] In addition to the technical problems solved by this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems solved by an ultrasonic transducer, an ultrasonic metering flow channel assembly, and an ultrasonic gas meter provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only a part of the embodiments of this application. These drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of the ultrasonic transducer provided in the embodiments of this application;

[0038] Figure 2 for Figure 1 Schematic diagram of the cross section of AA;

[0039] Figure 3 An exploded view of the ultrasonic metering flow channel assembly provided in an embodiment of this application;

[0040] Figure 4 This is a schematic diagram of the ultrasonic metering flow channel assembly provided in an embodiment of this application;

[0041] Figure 5 for Figure 4 A cross-sectional schematic diagram of CC;

[0042] Figure 6 This is a schematic diagram of the structure of the first support in the ultrasonic metering flow channel assembly provided in the embodiments of this application;

[0043] Figure 7 for Figure 6 A schematic diagram of the cross-section of BB.

[0044] Explanation of reference numerals in the attached figures:

[0045] 100-Ultrasonic transducer; 110-Piezoelectric element; 120-Metal part; 121-Receiving cavity; 122-Extension; 130-Acoustic matching layer; 140-Elastic element; 141-Recess; 142-Positioning part; 150-Signal line; 151-Positive line; 152-Negative line;

[0046] 200-Ultrasonic metering flow channel assembly;

[0047] 300 - First support; 310 - First limiting part; 320 - First compression amount; 330 - First hook; 340 - Second hook;

[0048] 400 - Second support; 410 - Second compression amount; 420 - Protrusion; 430 - Groove; 440 - Through hole; 500 - Flow channel; 510 - Flow channel. Detailed Implementation

[0049] 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 a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0050] As described in the background section, the recess of the insulating vibration damping component typically exposes at least a portion of the surface of the metal part, causing the mounting bracket to contact the metal part at the opening. Because the mounting bracket is in direct contact with the metal part, the vibrational sound waves from the upstream piezoelectric element are directly transmitted to the downstream ultrasonic transducer through rigid contact components such as the piezoelectric element-metal part-mounted bracket. These vibrational sound waves interfere with the ultrasonic signal propagating within the flow channel, leading to a decrease in signal accuracy. This affects the downstream ultrasonic transducer's ability to identify the valid signal, and in severe cases, may even cause misinterpretations, resulting in measurement errors and affecting the accuracy of ultrasonic measurements.

[0051] To address the aforementioned technical problems, the ultrasonic transducer provided in the first aspect of this application includes a piezoelectric element, a metal component, an acoustic matching layer, and an elastic element. The piezoelectric element is located on one side of the metal component, and the acoustic matching layer is located on the side of the metal component facing away from the piezoelectric element. The elastic element covers the outer edge of the metal component, and at least three recesses are formed on at least one surface of the elastic element. A thickness exists between the surface of the elastic element with recesses and the outer edge of the metal component. This ensures a certain thickness between the surface of the elastic element with recesses and the metal component, allowing the contact points on the elastic element to effectively absorb vibrations when the piezoelectric element generates a signal, thereby suppressing vibration propagation.

[0052] The ultrasonic metering flow channel assembly provided in the second aspect of this application includes an ultrasonic transducer, a first support, a second support, and a flow channel. The first support is located on one side of the ultrasonic transducer, with the piezoelectric element of the ultrasonic transducer facing the first support. The second support is located on the other side of the ultrasonic transducer, with the acoustic matching layer of the ultrasonic transducer facing the second support. The flow channel has at least one flow channel, and the second support is located on the flow channel, with a through-hole allowing ultrasonic waves to pass through, the through-hole communicating with the flow channel. Thus, at the points where the ultrasonic transducer directly contacts the first and second supports, corresponding elastic elements are present. When the piezoelectric element signal generates vibration, the contact point between the first support and the ultrasonic transducer is flexible, effectively absorbing the vibration at the contact point, thereby suppressing the transmission of vibration to the other ultrasonic transducer through the first support. The damping effect of the elastic elements absorbs vibration noise, thereby isolating the ultrasonic transducer from the influence of vibration noise along the transmission path through the second support and the flow channel.

[0053] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0054] This application provides an ultrasonic transducer, an ultrasonic metering flow channel assembly, and an ultrasonic gas meter. A certain thickness is provided between the surface of the elastic element with a recess and the metal element. When the piezoelectric signal generates vibration, the contact point between the first support and the ultrasonic transducer is flexible. This flexibility effectively absorbs the vibration at the contact point, thereby suppressing the transmission of vibration to the other ultrasonic transducer through the first support. The specific structures of the ultrasonic transducer, ultrasonic metering flow channel assembly, and ultrasonic gas meter provided in this application embodiment are described below with reference to the accompanying drawings.

[0055] refer to Figure 1 as well as Figure 2 This application provides an ultrasonic transducer 100 in a first aspect. The ultrasonic transducer 100 may include a piezoelectric element 110, a metal component 120, an acoustic matching layer 130, and an elastic element 140. The piezoelectric element 110 may be located on one side of the metal component 120, while the acoustic matching layer 130 may be located on the side of the metal component 120 facing away from the piezoelectric element 110. In one possible implementation, the metal component 120 may be a flat plate structure; the shape of the metal component 120 is not limited in this embodiment. In this embodiment, combined with... Figure 2The metal part 120 can have a receiving cavity 121 for placing the piezoelectric element 110, and the piezoelectric element 110 can be fixedly connected to the metal part 120. On the other hand, the acoustic matching layer 130 can be located on the side of the metal part 120 facing away from the piezoelectric element 110. It can be understood that one side of the metal part 120 is fixedly connected to the piezoelectric element 110, and the other side of the metal part 120 is fixedly connected to the acoustic matching layer 130. That is, the piezoelectric element 110 and the acoustic matching layer 130 can be located on both sides of the metal part 120, and the piezoelectric element 110 and the acoustic matching layer 130 can be bonded to both sides of the metal part 120 by adhesive.

[0056] Continue to refer to Figure 2 Based on the above embodiments, the elastic member 140 can cover the outer edge of the metal member 120 in the circumferential direction. In one possible implementation, a recess 141 can be formed on at least one surface of the elastic member 140, and the recess 141 does not expose the surface of the metal member 120. The number of recesses 141 can be at least three, and this application embodiment does not limit the number of recesses 141. In this application embodiment, three recesses 141 are used as an example, and the three recesses 141 can be evenly formed on one of the surfaces of the elastic member 140. There can be a certain thickness between the surface with the recess 141 and the outer edge of the metal member 120. In one possible implementation, the thickness between the surface with the recess 141 and the inner sidewall of the metal member 120 can be in the range of 0.1-0.5 mm. This design avoids direct contact between the support and metal component 120 on one side of the ultrasonic transducer 100, preventing the vibration sound waves from the upstream piezoelectric element 110 from being directly transmitted to the downstream transducer through rigid contact components such as the piezoelectric element 110, metal component 120, and support. This provides better vibration damping and ensures signal accuracy. (Continue to refer to...) Figure 2 Based on the above embodiments, in one possible implementation, the outer periphery of the metal part 120 may also have an extension 122. It is understood that the extension 122 protrudes from the metal part 120, and the elastic member 140 can fit against the extension 122. In this embodiment, the thickness between the surface of the elastic member 140 with the recess 141 and the surface of the extension 122 can be in the range of 0.1-0.5 mm.

[0057] Based on the above embodiments, in one possible implementation, the ultrasonic transducer may further include a backing portion. In this embodiment, the backing portion and the elastic member 140 may be an integral structure. It is understood that the backing portion may cover at least a portion of the piezoelectric element 110. Specifically, the backing portion may be attached to the outer surface of at least a portion of the piezoelectric element 110, thereby enabling the backing portion to cover at least a portion of the piezoelectric element 110. This allows for better absorption of vibration noise when the piezoelectric element 110 vibrates.

[0058] In this embodiment of the application, for example, both the elastic element 140 and the backing portion can be made of polyester elastomer, which has good elastic properties. The elastic element 140 and the backing portion can be injection molded onto the piezoelectric body 110 and the metal part 120, thereby allowing the elastic element 140 and the backing portion to cover at least a portion of the outer surface of the piezoelectric body 110 and at least a portion of the inner sidewall of the metal part 120.

[0059] Continue to refer to Figure 1 Based on the above embodiments, the ultrasonic transducer 100 may further include a signal line 150. The signal line 150 may further include a positive line 151 and a negative line 152. In this embodiment, the positive line 151 may be fixedly connected to the piezoelectric element 110, and the negative line 152 may be fixedly connected to the metal component 120. Exemplarily, the positive line 151 and the negative line 152 may be connected to the piezoelectric element 110 and the metal component 120 respectively via a welding process.

[0060] Continue to refer to Figure 1 Based on the above embodiments, the elastic member 140 may be provided with a positioning part 142 on the side facing the signal line 150. In one possible implementation, the number of positioning parts 142 may be at least two, and this embodiment does not impose a limitation. In this embodiment, two positioning parts 142 are used as an example, and the two positioning parts 142 may respectively wrap around one end of the positive line 151 and the negative line 152. It is understood that one positioning part 142 may wrap around the end of the positive line 151 connected to the piezoelectric element 110, and the other positioning part 142 may wrap around the end of the negative line 152 connected to the metal member 120. In this way, the positioning part 142 can define the installation direction of the ultrasonic transducer 100, facilitating the positioning of the ultrasonic transducer 100.

[0061] refer to Figure 3 as well as Figure 4A second aspect of this application provides an ultrasonic metering flow channel assembly 200. This ultrasonic metering flow channel assembly 200 may include the aforementioned ultrasonic transducer 100, first support 300, second support 400, and flow channel portion 500. In one possible implementation, combined with... Figure 2 The first support 300 can be located on one side of the ultrasonic transducer 100, with the piezoelectric element 110 of the ultrasonic transducer 100 facing the first support 300. The second support 400 can be located on the other side of the ultrasonic transducer 100, with the acoustic matching layer 130 of the ultrasonic transducer 100 facing the second support 400. Thus, the first support 300 and the second support 400 can be located on opposite sides of the ultrasonic transducer 100. It can be understood that the first support 300 can be fixedly connected to the second support 400, thereby allowing the ultrasonic transducer 100 to be fixed between the first support 300 and the second support 400.

[0062] Continue to refer to Figure 3 Based on the above embodiments, the flow channel portion 500 may have at least one flow channel 510. The second support 400 may be located on the flow channel portion 500. It is understood that the second support 400 can be fixedly connected to the flow channel portion 500 by fasteners. In one possible implementation, combined with... Figure 3 The second support 400 can be provided with a through hole 440, which can be formed on the top wall or side wall of the second support 400, and the through hole 440 corresponds to the flow channel 510. In this way, the flow channel 510 can be connected to the through hole 440 of the second support 400, which facilitates the propagation and reception of ultrasonic signals in the fluid. The damping effect of the elastic element 140 absorbs vibration noise, thereby isolating the influence of vibration noise on the transmission path.

[0063] In the embodiments of this application, reference continues to be made to Figure 3 as well as Figure 4 For example, the number of ultrasonic transducers 100, first supports 300, and second supports 400 can all be two, and the two ultrasonic transducers 100, first supports 300, and second supports 400 can be symmetrically arranged. It is understood that the ultrasonic transducers 100 are typically installed at an angle to optimize the propagation path of the ultrasonic signal. In one possible implementation, the two ultrasonic transducers 100 can be symmetrically arranged in a V-shape, which can increase the propagation distance of the ultrasonic waves in the fluid and improve measurement accuracy. This application embodiment specifically describes one side of the ultrasonic transducer 100, first support 300, and second support 400.

[0064] refer to Figure 5In the specific embodiment of this application, the side of the elastic element 140 in the ultrasonic transducer 100 with the recess 141 can abut against the first support 300. Additionally, in this embodiment, the backing portion in the ultrasonic transducer 100 can extend along the extension 122 of the metal element 120, extending towards the second support 400, so that at least a portion of the backing portion can abut against the second support 400. Thus, the ultrasonic transducer 100 has corresponding elastic elements 140 and backing portions at the points of direct contact with the first support 300 and the second support 400. When the piezoelectric element 110 generates a vibration, since the contact points between the first support 300 and the second support 400 and the ultrasonic transducer 100 are flexible, the flexibility can effectively absorb the vibration at the contact points, thereby suppressing the transmission of vibration through the first support 300 and the second support 400 to the other ultrasonic transducer.

[0065] refer to Figure 6 as well as Figure 7 Based on the above embodiments, a first limiting portion 310 may be provided on the side of the first support 300 facing the ultrasonic transducer 100. In one possible implementation, the number of first limiting portions 310 may be at least three, and this embodiment does not impose a limitation. In this embodiment, three first limiting portions 310 are used as an example. The three first limiting portions 310 may protrude from the first support 300, and the three first limiting portions 310 may be evenly distributed on the side of the first support 300 facing the ultrasonic transducer 100. Additionally, three recesses 141 may be evenly formed on the side of the elastic member 140 of the ultrasonic transducer 100 facing the first support 300. Thus, the first limiting portions 310 can correspond to the recesses 141 on the elastic member 140 of the ultrasonic transducer 100, thereby allowing the first limiting portions 310 to abut against the recesses 141 of the ultrasonic transducer 100. Understandably, based on the principle of three points defining a plane, not only can the positional accuracy of the ultrasonic transducer 100 be guaranteed to the maximum extent during the fixing process, but also less vibration can be transmitted to the first support 300.

[0066] Furthermore, it is understood that the first support 300 and the recess 141 on the elastic member 140 abut against each other to form a flexible contact, which avoids the first support 300 directly and rigidly contacting the metal part 120 of the ultrasonic transducer 100, and suppresses the vibration from being transmitted to another ultrasonic transducer through the first support 300.

[0067] In another possible implementation, the recess 141 can also be formed on the side of the elastic member 140 of the ultrasonic transducer 100 facing the second support 400. A second limiting portion (not shown in the figure) can be provided on the side of the second support 400 facing the ultrasonic transducer 100. In one possible implementation, the number of second limiting portions can be several, and this embodiment does not limit the number. In this embodiment, the second limiting portion can protrude from the second support 400, and the second limiting portion can correspond to the recess 141 of the ultrasonic transducer 100, thereby allowing the second limiting portion to abut against the recess 141 of the ultrasonic transducer 100. It is understood that the second limiting portion can also achieve flexible contact with the recess 141, which can also reduce the amount of vibration transmitted to the second support 400.

[0068] Continue to refer to Figure 5 Based on the above embodiments, in one possible implementation, a first compression amount 320 may be present between the first support 300 and the recess 141 of the ultrasonic transducer 100. Exemplarily, the range of the first compression amount 320 may be 0.1-0.3 mm. Correspondingly, a second compression amount 410 may also be present between the second support 400 and the recess 141 of the ultrasonic transducer 100. Exemplarily, the range of the second compression amount 410 may be 0.1-0.3 mm. It is understood that a slight interference amount can absorb installation tolerances and prevent the ultrasonic transducer 100 from shaking due to the influence of tolerances in some structural components.

[0069] Continue to refer to Figure 7 Based on the above embodiments, the first bracket 300 may be provided with a first hook 330 and a second hook 340, with the first hook 330 and the second hook 340 arranged opposite to each other. Wherein, combined with Figure 5 As can be seen, both the first hook 330 and the second hook 340 can extend towards the second bracket 400. Correspondingly, the second bracket 400 can also have two protrusions 420, which are arranged opposite each other and protrude from the outer surface of the second bracket 400. Thus, the two protrusions 420 can respectively engage with the first hook 330 and the second hook 340, thereby fixing the first bracket 300 and the second bracket 400 together through the cooperation of the first hook 330, the second hook 340, and the protrusions 420. It is understood that the first hook 330 and the second hook 340 are different in shape, size, and position, which effectively prevents mistaken installation and facilitates the installation of the ultrasonic metering flow channel assembly 200.

[0070] Continue to refer to Figure 3Based on the above embodiment, a groove 430 may be provided on the second bracket 400. The groove 430 and the positioning part 142 of the ultrasonic transducer 100 can be correspondingly provided, so that the groove 430 and the positioning part 142 of the ultrasonic transducer 100 cooperate. It is understood that the width of the protrusion of the positioning part 142 in the ultrasonic transducer 100 can cooperate with the groove 430 in the second bracket 400, thereby facilitating the accurate determination of the installation direction of the ultrasonic metering flow channel assembly 200.

[0071] A third aspect of this application provides an ultrasonic gas meter (not shown in the figure). The ultrasonic gas meter may include the ultrasonic metering flow channel assembly 200 described above.

[0072] In this embodiment, a certain thickness is provided between the surface of the elastic element 140 with the recess 141 and the metal element 120. When the piezoelectric element 110 generates a vibration, the contact point between the fixing component and the ultrasonic transducer 100 is a flexible contact. This flexibility can effectively absorb the vibration at the contact point, thereby suppressing the vibration from being transmitted to the other ultrasonic transducer 100 through the first support 300 and the second support 400. While ensuring the fixing accuracy of the ultrasonic transducer 100, the propagation of vibration is reduced when measuring the fluid being measured, improving production efficiency and the measurement accuracy of ultrasound.

[0073] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0074] It should be noted that phrases such as "in specific implementations," "in some embodiments," "in this embodiment," and "exemplarily" in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0075] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0076] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0077] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0078] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is 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 its scope. The scope of the invention is limited only by the appended claims.

Claims

1. An ultrasonic transducer, characterized in that, include: piezoelectric elements; A metal component, wherein the piezoelectric element is located on one side of the metal component; An acoustic matching layer is located on the side of the metal component facing away from the piezoelectric element; An elastic element, wherein the elastic element covers the outer edge of the metal element; At least three recesses are formed on at least one surface of the elastic member, and there is a thickness between the surface with the recesses and the outer edge of the metal member.

2. The ultrasonic transducer according to claim 1, characterized in that, The outer periphery of the metal part has an extension, and the elastic element and the extension are in contact. The thickness between the surface of the elastic element where the recess is formed and the surface of the extension is formed is in the range of 0.1-0.5 mm.

3. The ultrasonic transducer according to claim 2, characterized in that, The ultrasonic transducer further includes a backing portion, wherein the backing portion and the elastic element are integrally formed. The backing portion covers at least a portion of the piezoelectric element.

4. The ultrasonic transducer according to claim 3, characterized in that, The ultrasonic transducer further includes: a signal line, the signal line including a positive line and a negative line, the positive line being fixedly connected to the piezoelectric element, and the negative line being fixedly connected to the metal part; The elastic element has two positioning parts on the side facing the signal line, and the two positioning parts are respectively wrapped around one end of the positive line and the negative line.

5. An ultrasonic metering flow channel assembly, characterized in that, include: The ultrasonic transducer according to any one of claims 1-4 above; A first support is located on one side of the ultrasonic transducer, and the piezoelectric element of the ultrasonic transducer is positioned facing the first support. The second support is located on the other side of the ultrasonic transducer, and the acoustic matching layer of the ultrasonic transducer is disposed facing the second support. The flow channel portion has at least one flow channel, the second support is located on the flow channel portion, and the second support is provided with a through hole through which ultrasonic waves can pass, the through hole being connected to the flow channel.

6. The ultrasonic metering flow channel assembly according to claim 5, characterized in that, The first bracket has a first limiting part on the side facing the ultrasonic transducer, and the first limiting part protrudes from the first bracket; The first limiting part and the recess of the ultrasonic transducer are correspondingly provided, and the first limiting part and the recess of the ultrasonic transducer abut against each other.

7. The ultrasonic metering flow channel assembly according to claim 5, characterized in that, The second bracket has a second limiting part on the side facing the ultrasonic transducer, and the second limiting part protrudes from the second bracket; The second limiting part abuts against the recess of the ultrasonic transducer.

8. The ultrasonic metering flow channel assembly according to claim 6, characterized in that, The first bracket and the recess of the ultrasonic transducer have a first compression amount, the first compression amount being in the range of 0.1-0.3 mm; The second bracket and the recess of the ultrasonic transducer have a second compression amount, which ranges from 0.1 to 0.3 mm.

9. The ultrasonic metering flow channel assembly according to any one of claims 5-8, characterized in that, The first bracket is provided with a first hook and a second hook that are arranged opposite to each other, and both the first hook and the second hook extend toward the second bracket; The second bracket has two opposing protrusions that protrude from the second bracket and engage with the first hook and the second hook respectively, so that the first bracket and the second bracket are fixedly connected.

10. An ultrasonic gas meter, characterized in that, Includes the ultrasonic metering flow channel assembly as described in any one of claims 5-9.

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