Water-cooled ultrasonic flue gas flow detection transducer
By using a water-cooled ultrasonic flue flow detection transducer and employing a titanium alloy diaphragm and cooling pipe design, the problem of decreased accuracy of ultrasonic flow meters under high-temperature environments has been solved, enabling accurate flow monitoring under high-temperature conditions.
Patent Information
- Application Number
- CN202522114086.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-30
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-09-30
AI Technical Summary
Existing ultrasonic flow meters experience performance degradation in high-temperature environments, leading to decreased flow detection accuracy and even depolarization of the ceramic plates, resulting in loss of performance.
A water-cooled ultrasonic flue flow detection transducer is adopted. The opening of the outer shell is covered by a titanium alloy diaphragm. The cooling pipe is in contact with the inner wall of the outer shell, the matching layer and the titanium alloy diaphragm. Cooling water is used to cool down and eliminate sound wave reflection. The outer shell and cover plate are made of titanium alloy material to withstand high-temperature driving power.
Achieving accurate flow monitoring in high-temperature environments avoids performance failure of piezoelectric ceramic rings, ensuring detection accuracy and device stability.
Smart Images
Figure CN224681613U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of industrial flue gas monitoring technology, specifically to a water-cooled ultrasonic flue gas flow detection transducer suitable for high-temperature flue gas environments. Background Technology
[0002] For monitoring the flow rate of flue gas emissions in industrial settings, ultrasonic flow meters are commonly used. An ultrasonic flow meter is an instrument that measures flow velocity and flow rate by utilizing the propagation characteristics of ultrasonic waves in flowing fluids. It is a non-contact or immersion measuring instrument with significant advantages such as no pressure loss, easy installation, and a wide range of applicable pipe diameters.
[0003] However, commonly used ultrasonic flow meters will experience performance degradation in high-temperature environments of 100 degrees Celsius, leading to a decrease in flow detection accuracy. In more severe cases, the ultrasonic flow meter may lose its performance due to the depolarization of the ceramic disc caused by high temperature. Utility Model Content
[0004] In view of the above problems, this application provides a water-cooled ultrasonic flue flow detection transducer to solve the problem that existing ultrasonic flow meters lose performance due to high temperature when monitoring flow in high-temperature flue environments.
[0005] To achieve the above objectives, the inventors provide a water-cooled ultrasonic flue gas flow detection transducer, comprising:
[0006] The outer casing has an opening at its bottom;
[0007] A titanium alloy diaphragm is disposed at the bottom of the housing and covers the opening on the housing;
[0008] A matching layer is disposed inside the housing and adheres to the titanium alloy diaphragm, and a gap exists between the matching layer and the side wall of the housing;
[0009] A rear cover plate, a piezoelectric ceramic ring, and a front cover plate are sequentially arranged inside the outer casing. The rear cover plate, the piezoelectric ceramic ring, and the front cover plate are locked together by stress bolts. The front cover plate is bonded to the matching layer.
[0010] A cooling pipe is disposed inside the housing and contacts the inner wall of the housing, the matching layer and the titanium alloy diaphragm;
[0011] The top cover is disposed on the top of the housing, and the top cover has a first through hole through which a cable passes and a second through hole through which a cooling pipe passes.
[0012] Unlike existing technologies, the above technical solution covers the opening at the bottom of the housing with a titanium alloy diaphragm, facilitating the transmission and reception of ultrasonic waves. The front cover, piezoelectric ceramic ring, and rear cover are secured with stress bolts to withstand higher driving power. Simultaneously, a matching layer eliminates the significant energy reflection problem caused by sound waves propagating between the titanium alloy diaphragm and the front cover. By installing cooling pipes inside the housing, ensuring full contact between the cooling pipes and the inner wall of the housing, the matching layer, and the titanium alloy diaphragm, cooling water is supplied to the housing through the cooling pipes when operating in high-temperature environments. This cools the internal environment, the matching layer, and the titanium alloy diaphragm, preventing the high-temperature environment of the external flue from affecting the internal components. This allows the transducer to achieve accurate flow monitoring even in high-temperature environments and avoids the performance failure of the high-temperature piezoelectric ceramic ring.
[0013] In some embodiments, the cooling pipes are arranged in a spiral shape within the housing. This spiral arrangement ensures a large heat exchange area, improves heat exchange efficiency, and enables rapid cooling of the environment inside the housing.
[0014] In some embodiments, the cooling pipe is S-shaped and disposed within the housing. This displaces the heat transferred to the titanium alloy diaphragm and matching layer, further reducing the impact of heat on the internal components, ensuring the accuracy of flow detection by the transducer in high-temperature environments, and preventing performance failure of the electro-ceramic plate in high-temperature environments.
[0015] In some embodiments, quick-connect fittings are provided at both the inlet and outlet of the cooling pipe. This allows for quick installation, replacement, and maintenance of the cooling pipe system with external heat exchange devices.
[0016] In some embodiments, a temperature sensing sensor is further included, which is disposed within the housing. By disposing of the temperature sensing sensor within the housing, the temperature inside the transducer is transmitted to the outside.
[0017] In some embodiments, both the outer shell and the outer cover are made of titanium alloy. This makes the transducer less prone to deformation and corrosion in high-temperature environments.
[0018] In some embodiments, the front cover is made of hard aluminum.
[0019] In some embodiments, the rear cover is made of steel.
[0020] The above description of the utility model is merely an overview of the technical solution of this application. In order to enable those skilled in the art to better understand the technical solution of this application and to implement it based on the description and drawings, and to make the above-mentioned objectives and other objectives, features and advantages of this application easier to understand, the following description is provided in conjunction with the specific embodiments and drawings of this application. Attached Figure Description
[0021] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features, and effects of specific embodiments of this application and other related content, and should not be considered as limitations on this application.
[0022] In the accompanying drawings of the instruction manual:
[0023] Figure 1 This is a schematic diagram of a water-cooled ultrasonic flue flow detection transducer according to a specific embodiment.
[0024] Figure 2 for Figure 1 A magnified schematic diagram of part A in the middle;
[0025] Figure 3 This is a schematic diagram of another structure of the water-cooled ultrasonic flue flow detection transducer described in a specific embodiment;
[0026] Figure 4 A three-dimensional schematic diagram showing that the cooling pipe is spiral-shaped in a specific embodiment;
[0027] Figure 5 A side view schematic diagram showing the cooling pipe in a spiral shape as described in a specific embodiment;
[0028] Figure 6 A top view schematic diagram showing the spiral shape of the cooling pipe in a specific embodiment;
[0029] Figure 7 A three-dimensional schematic diagram showing that the cooling pipe is S-shaped in a specific embodiment;
[0030] Figure 8 A side view schematic diagram showing that the cooling pipe is S-shaped in a specific embodiment;
[0031] Figure 9 This is a top view schematic diagram showing that the cooling pipe described in a specific embodiment is S-shaped.
[0032] The reference numerals used in the above figures are explained as follows:
[0033] 1. Stress bolts;
[0034] 2. Temperature detection sensor;
[0035] 3. Rear cover;
[0036] 4. Piezoelectric ceramic ring;
[0037] 5. Front cover;
[0038] 6. Matching layer;
[0039] 7. Outer casing;
[0040] 8. Top cover;
[0041] 9. Cooling pipes;
[0042] 10. Quick-connect adapter;
[0043] 11. Cables;
[0044] 12. Titanium alloy diaphragm. Detailed Implementation
[0045] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.
[0046] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.
[0047] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.
[0048] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.
[0049] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.
[0050] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.
[0051] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.
[0052] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.
[0053] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0054] Please see Figure 1-3 This embodiment provides a water-cooled ultrasonic flue gas flow detection transducer, comprising:
[0055] The outer casing 7 has an opening at its bottom;
[0056] A titanium alloy diaphragm 12 is disposed at the bottom of the housing 7 and covers the opening on the housing 7;
[0057] A matching layer 6 is disposed inside the outer shell 7 and adheres to the titanium alloy diaphragm 12. There is a gap between the matching layer 6 and the side wall of the outer shell 7. The gap is used so that when the cooling pipe 9 is arranged inside the outer shell 7, it can effectively contact the matching layer 6 and the titanium alloy diaphragm 12, so that the cooling pipe 9 can cool the matching layer 6 and the titanium alloy diaphragm 12.
[0058] The rear cover plate 3, the piezoelectric ceramic ring 4, and the front cover plate 5 are sequentially arranged inside the outer casing 7. The rear cover plate, the piezoelectric ceramic ring, and the front cover plate 5 are locked together by stress bolts 1. The front cover plate 5 is bonded to the matching layer 6.
[0059] Cooling pipe 9 is disposed inside the housing 7 and contacts the inner wall of the housing 7, the matching layer 6 and the titanium alloy diaphragm 12;
[0060] The top cover 8 is disposed on the top of the outer casing 7. The top cover 8 has a first through hole through which a cable 11 passes and a second through hole through which a cooling pipe 9 passes. The cable 11 is a corrosion-resistant cable 11, used to connect the wire to the piezoelectric ceramic ring inside the outer casing 7, so as to realize the energization of the piezoelectric ceramic ring or receive the electrical energy generated by the piezoelectric ceramic ring. There are two second through holes, one for each end of the cooling pipe 9, so that the coolant enters through one end of the cooling pipe 9 to absorb the temperature inside the outer casing 7, and then flows out from the other end of the cooling pipe 9.
[0061] By covering the opening at the bottom of the housing 7 with a titanium alloy diaphragm 12, it is easy to transmit or receive ultrasonic waves. The front cover plate 5, the piezoelectric ceramic ring 4, and the rear cover plate 3 are locked with stress bolts 1 to withstand higher driving power. At the same time, the matching layer 6 eliminates the problem of huge energy reflection generated when the sound wave propagates between the titanium alloy diaphragm 12 and the front cover plate 5. By setting a cooling pipe 9 inside the housing 7, and ensuring that the cooling pipe 9 is in full contact with the inner wall of the housing 7, the matching layer 6, and the titanium alloy diaphragm 12, and by sending cooling water into the housing 7 through the second through hole of the upper cover 8 when working in a high-temperature environment, the cooling water is cooled to the environment inside the housing 7, the matching layer 6, and the titanium alloy diaphragm 12. This prevents the high-temperature environment of the external flue from affecting the internal components, enabling the transducer to achieve accurate flow monitoring even in a high-temperature environment and avoiding the problem of high-temperature piezoelectric ceramic ring performance failure.
[0062] When the transducer is used as an ultrasonic generator, energizing the piezoelectric ceramic ring causes it to vibrate. The vibration is then transmitted towards the front cover plate via the front and rear cover plates, and most of the vibration is transmitted to the titanium alloy diaphragm via the matching layer, thus generating ultrasonic waves in the medium. When the transducer is used as an ultrasonic receiver, the titanium alloy diaphragm receives the ultrasonic waves in the medium and vibrates. This vibration is then transmitted to the piezoelectric ceramic ring via the matching layer and the front cover plate. The piezoelectric ceramic ring generates electrical energy upon receiving the vibration, which is then transmitted to the outside world via the wires in the cable.
[0063] In some embodiments, the cooling pipe 9 is arranged in a spiral shape within the housing 7. For example... Figure 4-6 The cooling pipe 9 shown is arranged in a spiral shape, which allows the cooling pipe 9 to fit against the inner wall of the outer shell 7. At the same time, the cooling pipe 9 is also arranged in the gap between the matching layer 6 and the inner wall of the outer shell 7, so that the cooling pipe 9 can fully contact the matching layer 6 and the titanium alloy diaphragm 12. The spiral distribution of the cooling pipe 9 can ensure a large heat exchange area, improve the heat exchange effect, and achieve rapid cooling of the internal environment of the outer shell 7.
[0064] In some embodiments, the cooling pipe 9 is arranged in an S-shape within the housing 7. For example... Figure 7-9 The cooling pipe 9 shown is S-shaped and fits against the inner wall of the housing 7. It can displace the heat transferred to the housing 7 from the outside, preventing the high temperature of the outside from affecting the devices inside the housing 7. At the same time, the cooling pipe 9 is also arranged in the gap between the matching layer 6 and the inner wall of the housing 7, making full contact with the matching layer 6 and the titanium alloy diaphragm 12. It can also displace the heat transferred to the titanium alloy diaphragm 12 and the matching layer 6, further reducing the impact of heat on the devices inside the housing 7, ensuring the accuracy of the transducer's flow detection in high-temperature environments, and avoiding the performance failure of the electro-ceramic sheet in high-temperature environments.
[0065] Please see Figure 1 and 3 In some embodiments, quick-connect adapters 10 are provided at both the inlet and outlet of the cooling pipe 9. By providing quick-connect adapters 10 at the inlet and outlet of the cooling pipe 9, quick installation, replacement, and maintenance of the cooling pipe 9 and external heat exchange devices can be achieved.
[0066] Please see Figure 1In some embodiments, a temperature sensor 2 is also included, which is disposed within the housing 7. By placing the temperature sensor 2 within the housing 7, the internal temperature of the transducer is transmitted to the outside, facilitating temperature control of the transducer via the cooling pipe 9 and ensuring long-term stable operation of the transducer. The temperature sensor and the piezoelectric ceramic ring share the same cable 11, and the data line of the temperature sensor is connected to the outside via a cable. The temperature sensor is an NTC temperature sensor 2, which is a thermistor probe whose resistance decreases rapidly as temperature rises. It is typically composed of two or three metal oxides mixed in a fluid-like clay and calcined into a dense sintered ceramic in a high-temperature furnace. In other embodiments, other types of temperature sensors, such as thermocouple temperature sensors 2, may also be used.
[0067] In some embodiments, both the outer casing 7 and the outer cover are made of titanium alloy. The use of titanium alloy for the outer casing 7 and the outer cover, a titanium alloy being an alloy of titanium and other metals, provides high strength, good corrosion resistance, and high heat resistance, making the transducer less prone to deformation and corrosion in high-temperature environments.
[0068] In some embodiments, the front cover plate 5 is made of hard aluminum and the rear cover plate 3 is made of steel. This allows the vibration generated by the piezoelectric ceramic ring to be transmitted through the front cover plate 5.
[0069] In some embodiments, a water-cooled ultrasonic flue gas flow detection transducer with high sensitivity and a working temperature maintained at 70℃±5℃ via a water-cooling circulation system is provided, comprising: a stress bolt 1; a temperature sensor 2; a rear cover plate 3 made of 45# steel; a piezoelectric ceramic ring with a high Curie temperature point; a front cover plate made of hard aluminum 5; a matching layer 6; a housing made of titanium alloy 7; a top cover made of titanium alloy 8; a cooling pipe 9; a quick adapter 10; a high-temperature and corrosion-resistant cable 11; and a titanium alloy diaphragm 12.
[0070] The piezoelectric ceramic ring is secured with stress bolts 1 using front cover plate 5 and rear cover plate 3 to withstand higher drive power. A matching layer 6 and titanium alloy diaphragm 12 are bonded to the front of front cover plate 5 to achieve impedance matching between the transducer and the air medium, as well as corrosion and high-temperature resistance. Cooling pipe 9 effectively contacts the outer shell 7, matching layer 6, and titanium alloy diaphragm 12. During operation, the cooling system uses a temperature sensor 2 added inside the transducer to monitor the temperature in real time, efficiently transmitting the transducer temperature and ensuring long-term stable operation. Cooling pipe 9 uses quick-connect fittings 10 for easy installation, replacement, and maintenance of the piping on-site.
[0071] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.
Claims
1. A water-cooled ultrasonic flue gas flow detection transducer, characterized in that, include: The outer casing has an opening at its bottom; A titanium alloy diaphragm is disposed at the bottom of the housing and covers the opening on the housing; A matching layer is disposed inside the housing and adheres to the titanium alloy diaphragm, and a gap exists between the matching layer and the side wall of the housing; A rear cover plate, a piezoelectric ceramic ring, and a front cover plate are sequentially arranged inside the outer casing. The rear cover plate, the piezoelectric ceramic ring, and the front cover plate are locked together by stress bolts. The front cover plate is bonded to the matching layer. A cooling pipe is disposed inside the housing and contacts the inner wall of the housing, the matching layer and the titanium alloy diaphragm; The top cover is disposed on the top of the housing, and the top cover has a first through hole through which a cable passes and a second through hole through which a cooling pipe passes.
2. The water-cooled ultrasonic flue gas flow detection transducer according to claim 1, characterized in that, The cooling pipe is arranged in a spiral shape inside the outer casing.
3. The water-cooled ultrasonic flue gas flow detection transducer according to claim 1, characterized in that, The cooling pipe is S-shaped and installed inside the housing.
4. The water-cooled ultrasonic flue gas flow detection transducer according to claim 1, characterized in that, The cooling pipe is equipped with quick-connect fittings at both the inlet and outlet.
5. The water-cooled ultrasonic flue gas flow detection transducer according to claim 1, characterized in that, It also includes a temperature detection sensor, which is disposed within the housing.
6. The water-cooled ultrasonic flue gas flow detection transducer according to claim 1, characterized in that, Both the outer shell and the outer cover are made of titanium alloy.
7. The water-cooled ultrasonic flue gas flow detection transducer according to claim 1, characterized in that, The front cover is made of hard aluminum.
8. The water-cooled ultrasonic flue gas flow detection transducer according to claim 1, characterized in that, The rear cover is made of steel.