CN217654565U - Ultrasonic transducer for ultrasonic flowmeter and ultrasonic flowmeter - Google Patents
Ultrasonic transducer for ultrasonic flowmeter and ultrasonic flowmeter Download PDFInfo
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- CN217654565U CN217654565U CN202221806932.1U CN202221806932U CN217654565U CN 217654565 U CN217654565 U CN 217654565U CN 202221806932 U CN202221806932 U CN 202221806932U CN 217654565 U CN217654565 U CN 217654565U
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Abstract
The utility model discloses an ultrasonic transducer and ultrasonic flowmeter for ultrasonic flowmeter, ultrasonic transducer for ultrasonic flowmeter includes casing, transduction electric capacity and circuit board, and the casing is made by ceramic material, and the casing is equipped with the holding chamber, and transduction electric capacity and circuit board interval are established in the holding chamber, and transduction electric capacity and circuit board electric connection; the ultrasonic flow meter comprises the ultrasonic transducer for the ultrasonic flow meter. According to the ultrasonic transducer for the ultrasonic flowmeter, the transduction capacitor is matched with the circuit board to send and receive ultrasonic signals, and the accommodating cavity of the shell is used for accommodating the transduction capacitor and the circuit board; the shell is made of ceramic materials, the sending strength and the receiving strength of signals can be guaranteed in the aspect of acoustic matching, and deformation caused by the influence of high-temperature and high-pressure liquid is not prone to occurring in the aspects of mechanics and thermotics, so that normal work of the ultrasonic transducer is guaranteed.
Description
Technical Field
The utility model relates to an ultrasonic flowmeter technical field especially relates to an ultrasonic transducer and ultrasonic flowmeter for ultrasonic flowmeter.
Background
Ultrasonic flow meters are used for measuring the flow of liquids and comprise an ultrasonic transducer for transmitting or receiving ultrasonic signals.
The housing of the ultrasonic transducer is usually a plastic housing. However, when the object to be measured of the ultrasonic flowmeter is a high-temperature and high-pressure liquid, for example, a high-temperature and high-pressure liquid at 180 ℃, on one hand, the casing of the ultrasonic transducer is easily deformed due to the high-temperature and high-pressure measuring environment, and on the other hand, the plastic material has significant signal attenuation in the high-temperature environment, and it is difficult to ensure the signal transmission and reception strength of the ultrasonic transducer.
SUMMERY OF THE UTILITY MODEL
Based on this, it is necessary to provide an ultrasonic transducer for an ultrasonic flow meter and an ultrasonic flow meter; this an ultrasonic transducer for ultrasonic flowmeter can be used for carrying out flow detection to high temperature high pressure liquid, and non-deformable.
The technical scheme is as follows:
one embodiment provides an ultrasonic transducer for an ultrasonic flow meter, comprising:
the shell is made of ceramic materials and provided with an accommodating cavity;
the energy conversion capacitor and the circuit board are arranged in the accommodating cavity at intervals, and the energy conversion capacitor is electrically connected with the circuit board.
In the ultrasonic transducer for the ultrasonic flowmeter, the transduction capacitor is matched with the circuit board to send and receive ultrasonic signals, and the accommodating cavity of the shell is used for accommodating the transduction capacitor and the circuit board; the shell is made of ceramic materials, the sending strength and the receiving strength of signals can be guaranteed in acoustic matching, and deformation caused by the influence of high-temperature and high-pressure liquid is not prone to occurring in the aspects of mechanics and thermodynamics, so that normal work of the ultrasonic transducer is guaranteed.
The technical solution is further explained below:
in one embodiment, the accommodating cavity is provided with an opening, the transduction capacitor is located on one side of the circuit board far away from the opening, and the ultrasonic transducer for the ultrasonic flowmeter further comprises an adhesive body used for adhering the transduction capacitor to the shell.
In one embodiment, the bonding body is arranged between the bottom wall of the transduction capacitor and the bottom wall of the accommodating cavity, and the bonding body is arranged between at least one part of side wall of the transduction capacitor and the side wall of the accommodating cavity.
In one embodiment, the transduction capacitor is a ceramic capacitor, and a gap is formed between a side wall of the ceramic capacitor and a side wall of the accommodating cavity.
In one embodiment, the material of the bonding body comprises at least glass paste.
In one embodiment, the housing is provided with a step part which is arranged on a side wall of the accommodating cavity, the step part enables the accommodating cavity to form a first cavity part and a second cavity part, and the opening is a cavity opening of the first cavity part; the circuit board is abutted against the step part and is positioned in the first cavity part, and the transduction capacitor is positioned in the second cavity part.
In one embodiment, the step portion is annularly disposed, and the transduction capacitor is supported within the first cavity portion by the step portion; a gap is formed between the transduction capacitor and the circuit board.
In one embodiment, the first cavity part is further provided with a sealing body, and the sealing body is arranged on one side of the circuit board facing the opening;
the ultrasonic transducer for the ultrasonic flow meter further comprises a first signal line and a second signal line; one end of the first signal wire is electrically connected with the energy conversion capacitor, and the other end of the first signal wire is electrically connected with the circuit board; one end of the second signal wire is electrically connected with the circuit board, and the other end of the second signal wire penetrates through the sealing body and extends out of the shell.
In one embodiment, the ultrasonic transducer for the ultrasonic flowmeter further comprises a take-up drum, one end of the take-up drum is connected with the sealing body, and the take-up drum is used for receiving the second signal wire extending out of the sealing body.
Another embodiment provides an ultrasonic flow meter comprising an ultrasonic transducer for an ultrasonic flow meter as described in any of the above claims.
The ultrasonic flowmeter adopts the ultrasonic transducer for the ultrasonic flowmeter, the transduction capacitor is matched with the circuit board to send and receive ultrasonic signals, and the accommodating cavity of the shell is used for accommodating the transduction capacitor and the circuit board; the shell is made of ceramic materials, the sending strength and the receiving strength of signals can be guaranteed in acoustic matching, and deformation caused by the influence of high-temperature and high-pressure liquid is not prone to occurring in the aspects of mechanics and thermodynamics, so that normal work of the ultrasonic transducer is guaranteed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Furthermore, the drawings are not drawn to scale with 1.
Fig. 1 is a cross-sectional view of an overall structure of an ultrasonic transducer used in an ultrasonic flowmeter according to an embodiment of the present invention;
FIG. 2 is a sectional view of an assembly structure of the housing, the transducer capacitor, the circuit board, the adhesive body and the sealing body in the embodiment of FIG. 1;
fig. 3 is a sectional view showing the overall structure of the housing in the embodiment of fig. 1.
Reference is made to the accompanying drawings in which:
100. a housing; 110. an accommodating cavity; 111. a first cavity part; 112. a second cavity part; 120. a step portion; 200. a transduction capacitor; 300. a circuit board; 310. a first signal line; 320. a second signal line; 400. an adhesive body; 500. a sealing body; 600. a take-up drum.
Detailed Description
The following detailed description of embodiments of the present invention is made with reference to the accompanying drawings:
in order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
Referring to fig. 1 and 2, one embodiment provides an ultrasonic transducer for an ultrasonic flow meter, including a housing 100, a transducing capacitor 200, and a circuit board 300. Wherein:
as shown in fig. 1 and 2, the housing 100 is made of a ceramic material, and the housing 100 is provided with a receiving chamber 110.
For example, the housing 100 may be a rectangular housing 100, and the housing 100 may also be a cylindrical housing 100.
Alternatively, the housing 100 is made of a ceramic material such as alumina or zirconia.
As shown in fig. 1 and fig. 2, the transducer capacitor 200 and the circuit board 300 are disposed in the accommodating cavity 110 at an interval, and the transducer capacitor 200 is electrically connected to the circuit board 300.
Optionally, the circuit board 300 is made of a material resistant to high temperature (Tg point greater than 180 ℃) to adapt to a working environment above 140 ℃.
In the ultrasonic transducer for the ultrasonic flowmeter, the transduction capacitor 200 is matched with the circuit board 300 to transmit and receive ultrasonic signals, and the accommodating cavity 110 of the shell 100 is used for accommodating the transduction capacitor 200 and the circuit board 300; the casing 100 is made of a ceramic material, so that the sending strength and the receiving strength of signals can be ensured in acoustic matching, and the deformation caused by the influence of high-temperature and high-pressure liquid is not easy to occur in the aspects of mechanics and heat, thereby ensuring the normal operation of the ultrasonic transducer.
In one embodiment, referring to fig. 2 and fig. 3, the receiving cavity 110 has an opening, the transducing capacitor 200 is located on a side of the circuit board 300 away from the opening, the ultrasonic transducer for the ultrasonic flowmeter further includes an adhesive 400, and the adhesive 400 is used for adhering the transducing capacitor 200 to the housing 100.
As shown in fig. 2, the opening of the receiving cavity 110 on the housing 100 faces the upper side, the transducing capacitor 200 is located on the lower side of the circuit board 300, and the transducing capacitor 200 is adhered to the bottom wall of the receiving cavity 110 by the adhesive 400.
In one embodiment, referring to fig. 2, an adhesive 400 is disposed between the bottom wall of the transduction capacitor 200 and the bottom wall of the accommodation cavity 110, and the adhesive 400 is disposed between at least a portion of the side wall of the transduction capacitor 200 and the side wall of the accommodation cavity 110.
In the embodiment shown in fig. 2, the adhesive 400 is filled between the entire bottom wall of the transduction capacitor 200 and the bottom wall of the accommodation cavity 110, and the adhesive 400 is also filled between the lower portion of the sidewall of the transduction capacitor 200 and the sidewall of the accommodation cavity 110, so that on one hand, the transduction capacitor 200 can be adhered to the housing 100, and on the other hand, a gap is formed between the sidewall of the transduction capacitor 200 and the sidewall of the accommodation cavity 110.
Optionally, a portion of the adhesive 400 is disposed around the circumference of the transducing capacitor 200.
In one embodiment, the transducer capacitor 200 is a ceramic capacitor, and a gap is formed between a sidewall of the ceramic capacitor and a sidewall of the receiving cavity 110.
Optionally, the transducing capacitor 200 is a piezoelectric ceramic, such as a PZT piezoelectric ceramic.
In one embodiment, the material of bond 400 includes at least glass frit.
The material of the glass paste is adopted as the bonding body 400, on one hand, the high temperature resistance of the bonding body 400 is better, on the other hand, the transduction capacitor 200 and the shell 100 on the two sides of the bonding body 400 are both made of ceramic materials, the bonding strength with the ceramic materials is higher, and the stress generated by heating is closer to the stress generated by heating the ceramic materials.
Meanwhile, the mechanical and thermal characteristics of the ceramic casing 100 and the ceramic transduction capacitor 200 are more similar, the bonding failure due to large thermal expansion stress difference caused by temperature difference and temperature change is not easy to occur after bonding, and the compressive strength also meets the practical requirements, for example, the ceramic casing 100 can bear high pressure of 1.5MPa and can be used for a long time in an environment of about 140 ℃ so as to measure the flow and the flow speed of high-temperature and high-pressure liquid.
In one embodiment, referring to fig. 2 and 3, the housing 100 is provided with a step portion 120, the step portion 120 is provided on a sidewall of the receiving cavity 110, the step portion 120 enables the receiving cavity 110 to form a first cavity portion 111 and a second cavity portion 112, and an opening is a cavity opening of the first cavity portion 111; the circuit board 300 abuts against the step portion 120 and is located in the first cavity portion 111, and the transducer capacitor 200 is located in the second cavity portion 112.
As shown in fig. 3, a stepped portion 120 is disposed in the middle of the housing 100, a portion of the receiving cavity 110 above the stepped portion 120 is a first cavity portion 111, and a portion of the receiving cavity 110 below the stepped portion 120 is a second cavity portion 112. As shown in fig. 2, the circuit board 300 is disposed in abutment with the step portion 120 and is located in the space of the first cavity portion 111, and the transducing capacitor 200 is located in the second cavity portion 112.
In one embodiment, referring to fig. 2, the step portion 120 is disposed in a ring shape, and the transduction capacitor 200 is supported in the first cavity portion 111 by the step portion 120; there is a gap between the transducing capacitor 200 and the circuit board 300.
As shown in fig. 2, the transducer capacitor 200 is supported on the housing 100 by the step portion 120, and there is a gap between the transducer capacitor 200 and the circuit board 300, which corresponds to an air backing filled between the transducer capacitor 200 and the circuit board 300.
For example, if the housing 100 is provided in a cylindrical shape, the diameter of the first chamber section 111 is larger than the diameter of the second chamber section 112, and the step section 120 is formed between the first chamber section 111 and the second chamber section 112 due to the difference in diameter. At this time, the circuit board 300 may be a circular plate, and the diameter of the circuit board 300 is equal to the diameter of the first cavity portion 111. Of course, the housing 100 may be rectangular and cylindrical, and will not be described in detail.
In one embodiment, referring to fig. 1 and fig. 2, the first cavity 111 is further provided with a sealing body 500, and the sealing body 500 is disposed on a side of the circuit board 300 facing the opening.
As shown in fig. 1 and 2, the sealing body 500 is poured into the first cavity 111 to close the opening of the accommodating cavity 110, and the sealing body 500 is located on the upper side of the circuit board 300.
Alternatively, the sealing body 500 is made of a high temperature (200 ℃ or higher) resistant silicone adhesive.
In one embodiment, referring to fig. 1 and 2, the ultrasonic transducer for the ultrasonic flowmeter further includes a first signal line 310 and a second signal line 320; one end of the first signal line 310 is electrically connected to the transducing capacitor 200, and the other end of the first signal line 310 is electrically connected to the circuit board 300; one end of the second signal line 320 is electrically connected to the circuit board 300, and the other end of the second signal line 320 penetrates through the sealing member 500 and extends to the outside of the casing 100.
As shown in fig. 1 and 2, two ends of the first signal line 310 are respectively connected to the transduction capacitor 200 and the circuit board 300, so that the transduction capacitor 200 is electrically connected to the circuit board 300. Because of the air backing between the transducing capacitor 200 and the circuit board 300, the first signal line 310 passes directly through. As shown in fig. 1 and 2, the first signal line 310 has two.
As shown in fig. 1 and fig. 2, the lower end of the second signal line 320 is electrically connected to the circuit board 300, the upper end of the first signal line 310 passes through the sealing member 500 and extends to the outside of the casing 100, and two second signal lines 320 are provided, which are not described again.
Optionally, the first signal line 310 and the second signal line 320 both use a teflon material as a skin, so that the high temperature resistance is better and the reliability is high.
In one embodiment, referring to fig. 1 and fig. 2, the ultrasonic transducer for an ultrasonic flowmeter further includes a wire take-up tube 600, one end of the wire take-up tube 600 is connected to the sealing body 500, and the wire take-up tube 600 is used for receiving the second signal wire 320 extending from the sealing body 500.
As shown in fig. 1 and 2, the take-up drum 600 may be a cylinder, and the extended portions of the two second signal wires 320 are gathered in the take-up drum 600.
Another embodiment provides an ultrasonic flow meter comprising an ultrasonic transducer for an ultrasonic flow meter as described in any of the above embodiments.
The ultrasonic flowmeter adopts the ultrasonic transducer for the ultrasonic flowmeter, the transduction capacitor 200 is matched with the circuit board 300 to transmit and receive ultrasonic signals, and the accommodating cavity 110 of the shell 100 is used for accommodating the transduction capacitor 200 and the circuit board 300; the casing 100 is made of a ceramic material, so that the sending strength and the receiving strength of signals can be ensured in acoustic matching, and the deformation caused by the influence of high-temperature and high-pressure liquid is not easy to occur in the aspects of mechanics and heat, thereby ensuring the normal operation of the ultrasonic transducer.
In the description of the present invention, it is to 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", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An ultrasonic transducer for an ultrasonic flow meter, comprising:
the shell is made of ceramic materials and provided with an accommodating cavity;
the energy conversion capacitor and the circuit board are arranged in the accommodating cavity at intervals, and the energy conversion capacitor is electrically connected with the circuit board.
2. The ultrasonic transducer for the ultrasonic flowmeter of claim 1, wherein the receiving cavity is provided with an opening, the transducing capacitor is located on a side of the circuit board far away from the opening, and the ultrasonic transducer for the ultrasonic flowmeter further comprises an adhesive body for adhering the transducing capacitor to the housing.
3. The ultrasonic transducer for the ultrasonic flowmeter according to claim 2, wherein the adhesive body is arranged between the bottom wall of the transduction capacitor and the bottom wall of the accommodating cavity, and the adhesive body is arranged between at least a part of the side wall of the transduction capacitor and the side wall of the accommodating cavity.
4. The ultrasonic transducer for the ultrasonic flowmeter as defined in claim 2, wherein the transducing capacitor is a ceramic capacitor, and a gap is formed between a side wall of the ceramic capacitor and a side wall of the accommodating cavity.
5. The ultrasonic transducer for an ultrasonic flow meter according to claim 4, wherein the material of the bonding body comprises at least glass paste.
6. The ultrasonic transducer for the ultrasonic flowmeter according to any one of claims 2 to 5, wherein the case is provided with a stepped portion provided on a side wall of the housing cavity, the stepped portion causes the housing cavity to form a first cavity portion and a second cavity portion, and the opening is a cavity opening of the first cavity portion; the circuit board is abutted against the step part and located in the first cavity part, and the transduction capacitor is located in the second cavity part.
7. The ultrasonic transducer for an ultrasonic flowmeter of claim 6, wherein the step is provided in a ring shape, and the transducing capacitor is supported in the first cavity part by the step; a gap is formed between the transduction capacitor and the circuit board.
8. The ultrasonic transducer for an ultrasonic flowmeter of claim 6, wherein the first cavity part is further provided with a sealing body, and the sealing body is provided on a side of the circuit board facing the opening;
the ultrasonic transducer for the ultrasonic flow meter further comprises a first signal line and a second signal line; one end of the first signal wire is electrically connected with the transduction capacitor, and the other end of the first signal wire is electrically connected with the circuit board; one end of the second signal wire is electrically connected with the circuit board, and the other end of the second signal wire penetrates through the sealing body and extends out of the shell.
9. The ultrasonic transducer for the ultrasonic flow meter according to claim 8, further comprising a take-up reel, one end of the take-up reel being connected to the sealing body, the take-up reel being configured to receive the second signal line extending from the sealing body.
10. An ultrasonic flow meter comprising an ultrasonic transducer for an ultrasonic flow meter according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221806932.1U CN217654565U (en) | 2022-07-13 | 2022-07-13 | Ultrasonic transducer for ultrasonic flowmeter and ultrasonic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221806932.1U CN217654565U (en) | 2022-07-13 | 2022-07-13 | Ultrasonic transducer for ultrasonic flowmeter and ultrasonic flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217654565U true CN217654565U (en) | 2022-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221806932.1U Active CN217654565U (en) | 2022-07-13 | 2022-07-13 | Ultrasonic transducer for ultrasonic flowmeter and ultrasonic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217654565U (en) |
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2022
- 2022-07-13 CN CN202221806932.1U patent/CN217654565U/en active Active
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