Intelligent ultrasonic heat meter

Abstract

This invention relates to the field of intelligent sensor technology for heat measurement, and discloses an intelligent ultrasonic heat meter, including a detection tube section. The detection tube section has a main detection channel and an auxiliary channel inside. A separation component is installed at the water inlet end of the main detection channel, and a guide arc plate is installed above the separation component. The guide arc plate and the separation component form a two-stage bubble separation structure, which, in conjunction with the negative pressure suction generated by the vertical cavity of the water collection chamber, actively collects the bubble-containing liquid flow into the water collection chamber. Ultrasonic detection is performed only on the pure liquid flow within the main detection channel. The main detection channel is equipped with a flow replenishment component, which uses the negative pressure at the throat to replenish the liquid, balancing the flow velocity on the pipe wall in a ring shape and optimizing the flow velocity profile. This invention can actively remove bubble interference, balance the internal flow field, effectively reduce metering system deviation, significantly improve the flow rate and heat detection accuracy and operational stability of the ultrasonic heat meter, and is suitable for complex operating conditions in heating pipe networks.

Description

Technical Field

[0001] This invention relates to the field of intelligent sensors for heat measurement, and more particularly to an intelligent ultrasonic heat meter. Background Technology

[0002] Ultrasonic calorimeters are heat metering instruments developed based on the ultrasonic time-of-flight measurement principle. They integrate ultrasonic transducers, inlet and outlet temperature sensors, and intelligent computing modules. By detecting the flow velocity and instantaneous flow rate of fluid in the pipeline through ultrasound, they simultaneously collect the temperature difference between the supply and return water ends in real time. Combined with thermodynamic formulas, they accurately calculate the cumulative heat and instantaneous heat power of the medium. The instrument has no moving parts such as mechanical impellers inside, making it less prone to clogging and wear, with low pressure loss and high metering stability. It can adopt a single-channel or multi-channel structure to optimize measurement accuracy and is widely used in the scenarios of individual energy consumption metering and heat settlement in centralized heating, central air conditioning, and industrial heat pipe networks.

[0003] In existing ultrasonic heat meter technology, passive guidance is commonly used to eliminate air bubbles. This method can only handle large, discrete air bubbles, and its ability to eliminate tiny air bubbles that continuously enter the measurement section with the liquid flow is severely insufficient. Residual air bubbles will cause scattering, attenuation, and waveform distortion on the ultrasonic wave propagation path, directly causing propagation time detection errors. Furthermore, the inherent low flow velocity characteristics of the near-wall region of the pipe will cause the flow velocity profile to deviate from the ideal distribution, making it impossible for the line average velocity on the path traversed by the ultrasonic wave to accurately represent the cross-sectional average velocity, thus introducing systematic measurement errors in the flow conversion process. The aforementioned flow detection errors are further amplified in the heat metering process. Since heat calculation directly depends on the product of flow rate and supply and return water temperature difference, the systematic deviation of the flow rate value will cause the heat metering result to continuously deviate from the true value, which is particularly significant when the supply and return water temperature difference is small. This seriously affects the metering accuracy and trade settlement fairness of the heat meter in practical applications. Summary of the Invention

[0004] The technical problem to be solved by this invention is that existing ultrasonic heat meters cannot effectively eliminate microbubbles due to their passive debubbling method and lack of flow profile control, resulting in systematic deviations in ultrasonic propagation time detection and flow conversion. This deviation is amplified into a serious problem of inaccurate heat measurement under small temperature difference conditions. To address this, we propose an intelligent ultrasonic heat meter.

[0005] To achieve the above objectives, this application adopts the following technical solution: an intelligent ultrasonic heat meter, comprising: a detection tube section, wherein the detection tube section is provided with a main detection channel and an auxiliary channel, the water inlet end of the main detection channel is provided with a separation component, and a guide arc plate is provided above the separation component, a first bubble absorption gap is provided between the guide arc plate and the inner wall of the detection tube section, a second bubble absorption gap is provided between the top of the separation component and the guide arc plate, a water collection cavity enclosure plate is fixedly connected to the outer wall of the main detection channel, and a partition plate is fixedly connected to the outer wall of the main detection channel port, the water collection cavity enclosure plate and the partition plate separate the cavity between the main detection channel and the detection tube section into a water collection cavity, the water collection cavity including a bottom horizontal cavity and a vertical cavity, the vertical cavity being connected to both the first bubble absorption gap and the second bubble absorption gap, and the vertical cavity being able to provide suction at the first bubble absorption gap and the second bubble absorption gap to assist in drawing the liquid containing air bubbles into the water collection cavity; The main detection channel is equipped with a flow replenishment component, which is used to introduce the liquid flow inside the bottom transverse cavity into the main detection channel and to distribute the introduced liquid flow in a ring shape to replenish the area inside the main detection channel near the inner wall, thereby increasing the flow velocity of the liquid flow in the area inside the main detection channel near the inner wall.

[0006] Preferably, the main detection channel and the auxiliary channel are arranged in parallel, with the main detection channel located below the auxiliary channel. The inlet end of the auxiliary channel is connected to the vertical cavity, and an arc-shaped baffle is installed at the port of the auxiliary channel. A micro constant flow pump is installed inside the auxiliary channel.

[0007] Preferably, a heat meter integrator is installed at the top of the detection pipe section, and an ultrasonic generator is electrically connected to the side of the heat meter integrator. The detection end of the ultrasonic generator is inserted into the inner wall of the main detection channel and is located downstream of the diversion and replenishment component in the direction of water flow.

[0008] Preferably, the separation component includes a flow guide plate, an integrally connected flow reducer plate above the flow guide plate, a plurality of flow reducer mesh holes evenly formed inside the flow reducer plate, and an arc-shaped folding plate fixedly connected to the top of the flow reducer plate.

[0009] Preferably, the flow guide plate, the flow deflector plate, and the partition plate together form a drainage cavity, which is connected to the inlet end of the main detection channel.

[0010] Preferably, the flow replenishment component includes a throat portion integrally formed with the inner wall of the main detection channel. The throat portion protrudes inward to reduce the interception area at that section, thereby increasing the flow velocity at that section.

[0011] Preferably, the throat section has an annular pressure equalization chamber inside, and a suction port is provided on the outside of the annular pressure equalization chamber. The bottom transverse cavity is connected to the annular pressure equalization chamber through the suction port.

[0012] Preferably, a liquid replenishment port is provided on the inner side of the annular equalizing chamber, and the liquid replenishment port is arranged in a ring array about the inside of the throat section. The annular equalizing chamber is connected to the inside of the main detection channel through the liquid replenishment port.

[0013] Preferably, an exhaust assembly is installed at the top of the vertical cavity. The exhaust assembly includes a gas collection hood that communicates with the vertical cavity. A hydrophobic and breathable membrane is fixedly connected inside the gas collection hood, and an electromagnetic exhaust valve is provided at the top of the hydrophobic and breathable membrane. A miniature diaphragm pump is installed at the top of the gas collection hood.

[0014] Preferably, a second supplementary flow mesh plate is fixedly connected inside the main detection channel. The second supplementary flow mesh plate is located upstream of the diversion and supplementation component in the water flow direction. A first distribution mesh plate is fixedly connected inside the detection pipe section. The first distribution mesh plate is located at the water outlet end of the main detection channel and the auxiliary channel.

[0015] The technical effects and advantages of this invention are as follows: This invention employs a dual-channel integrated structure design, constructing a two-stage bubble separation system through a guide arc plate and separation components. Combined with the vertical cavity of the water collection chamber, it creates negative pressure adsorption suction on the first and second bubble-absorbing gaps, actively stratifying and collecting the fluid carrying bubbles in the pipeline flow into the water collection chamber. Furthermore, the separation process allows for the simultaneous diversion and discharge of some bubble-laden liquid, ensuring the purity of the liquid entering the main detection channel from the source and effectively preventing bubbles from scattering, attenuating, and deflecting the propagation path of ultrasonic signals. Utilizing the parallel vertical arrangement of the main detection channel and auxiliary channels, and leveraging the micro-channels within the auxiliary channels… The constant flow pump delivers the liquid in the vertical cavity of the water collection chamber at a constant flow rate, eliminating the need for ultrasonic testing. Even residual tiny air bubbles do not affect the overall measurement. The ultrasonic generator accurately detects the pure liquid flow in the main detection channel. By adjusting the flow rate of the two channels and combining it with the temperature difference in the pipeline network, the heat and heat can be accurately calculated. It has excellent anti-bubble interference capability, flow field self-balancing capability, and automatic air venting capability, significantly improving the accuracy, repeatability, and long-term operational stability of the ultrasonic heat meter's flow and heat detection. It is suitable for the use of heating pipeline networks with complex water quality and complex flow field conditions. The main detection channel of this invention is equipped with a flow replenishment component that generates negative pressure by relying on the throttling and speed-up effect of the throat. It automatically draws the clean liquid from the bottom transverse cavity through the suction port into the annular pressure equalization chamber for pressure stabilization, and then replenishes the pipe wall area through the replenishment port of the annular array. This effectively balances the flow velocity profile of the channel, weakens the interference of the pipe wall boundary layer, further reduces the measurement error caused by uneven flow velocity distribution, and improves the accuracy of heat measurement. Attached Figure Description

[0016] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts: Figure 1 This is a schematic cross-sectional view of the overall structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the entire invention; Figure 3 This is a schematic cross-sectional view of the water collection cavity portion of the present invention; Figure 4 This is a three-dimensional structural diagram of the separating component part of the present invention; Figure 5 This is a three-dimensional structural diagram of the water collection chamber enclosure and the main detection channel of the present invention; Figure 6 This is a cross-sectional structural diagram of the drainage and supplementation component of the present invention; Figure 7 This is a cross-sectional structural diagram of the exhaust assembly of the present invention; Figure 8 This is a three-dimensional structural diagram of the arc-shaped baffle portion of the present invention.

[0017] Legend: 1. Detection pipe section; 2. Main detection channel; 3. Auxiliary channel; 4. Separation component; 5. Guide arc plate; 6. Drainage and replenishment component; 7. Water collection chamber enclosure plate; 8. Exhaust component; 9. Bottom horizontal cavity; 10. Vertical cavity; 11. Separator plate; 12. Miniature constant flow pump; 13. Arc-shaped baffle; 14. Heat meter integrator; 15. First flow distribution mesh plate; 16. Second replenishment mesh plate; 17. Ultrasonic generator; 401. Guide lifting plate; 402. Flow reducing plate; 403. Flow reducing mesh; 404. Arc-shaped folding plate; 405. Water drop chamber; 601. Throat section; 602. Annular equalizing chamber; 603. Liquid suction port; 604. Liquid replenishment port; 801. Gas collection hood; 802. Hydrophobic and breathable membrane; 803. Electromagnetic exhaust valve; 804. Miniature diaphragm vacuum pump. Detailed Implementation

[0018] It is readily understood that, based on the technical solution of this invention, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of the invention. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative examples of the technical solution of this invention and should not be considered as the entirety of the invention or as limitations or restrictions on the technical solution of this invention.

[0019] Reference Figures 1 to 8As shown, the present invention provides a technical solution: an intelligent ultrasonic heat meter, comprising a detection tube section 1, wherein the detection tube section 1 is provided with a main detection channel 2 and an auxiliary channel 3, a separation component 4 is provided at the water inlet end of the main detection channel 2, and a guide arc plate 5 is provided above the separation component 4, a first bubble absorption gap is provided between the guide arc plate 5 and the inner wall of the detection tube section 1, a second bubble absorption gap is provided between the top of the separation component 4 and the guide arc plate 5, a water collection chamber enclosure plate 7 is fixedly connected to the outer wall of the main detection channel 2, and a partition plate 11 is fixedly connected to the outer wall of the port of the main detection channel 2. The water collection chamber enclosure plate 7 and the partition plate 11 separate the cavity between the main detection channel 2 and the detection tube section 1 into a water collection chamber, the water collection chamber including a bottom horizontal cavity 9 and a vertical cavity 10, the vertical cavity 10 being connected to the first bubble absorption gap and the second bubble absorption gap respectively, and the vertical cavity 10 being able to provide suction at the first bubble absorption gap and the second bubble absorption gap to assist in sucking the liquid containing air bubbles into the water collection chamber; The separation component 4 includes a flow guide plate 401, and an integral flow reducer plate 402 is connected above the flow guide plate 401. The flow reducer plate 402 has a plurality of flow reducer mesh holes 403 evenly opened inside. An arc-shaped folding plate 404 is fixedly connected to the top of the flow reducer plate 402. The flow guide plate 401, the flow reducer plate 402 and the partition plate 11 together form a water drop chamber 405, which is connected to the inlet end of the main detection channel 2.

[0020] This intelligent ultrasonic heat meter forms a two-stage bubble separation structure through the flow guide arc plate 5 and the separation component 4. The flow guide arc plate 5 can initially guide and separate the liquid flow containing bubbles through the detection pipe section 1, allowing the liquid flow with bubbles on the surface to flow into the water collection chamber through the first bubble absorption gap. The separation component 4, with the cooperation of the flow guide rising plate 401, the flow descending plate 402, the flow descending mesh 403 and the arc-shaped baffle 404, performs secondary fine bubble separation of the liquid flow. The clean liquid flow rises through the flow guide rising plate 401 and falls into the water discharge chamber 405 through the flow descending mesh 403 and smoothly enters the main detection flow channel 2. The remaining liquid flow with residual bubbles flows through the second stage of the bubble separation process. The water flows into the collection chamber through the two bubble gaps; at the same time, the vertical cavity 10 of the collection chamber can continuously provide adsorption suction for the first and second bubble gaps, and enhance the bubble diversion and collection effect by negative pressure assistance. In the process of two-stage bubble separation, the device's fault tolerance allows some of the liquid flow carrying bubbles to be separated and discharged together, eliminating the bubble interference medium in the fluid to the greatest extent from the source, fully ensuring the purity of the liquid flow that finally enters the main detection channel 2, effectively avoiding the scattering, attenuation and path deviation problems caused by bubbles to ultrasonic wave propagation, significantly reducing the measurement error caused by bubbles, and improving the overall detection accuracy and operational stability of the ultrasonic heat meter.

[0021] A heat meter integrator 14 is installed at the top of the detection pipe section 1. An ultrasonic generator 17 is electrically connected to the side of the heat meter integrator 14. The detection end of the ultrasonic generator 17 is inserted into the inner wall of the main detection channel 2 and is located downstream of the diversion and supplementation component 6 in the direction of water flow. It is used to detect the flow rate data in the main detection channel 2 using the ultrasonic channel, and then to calculate the heat data.

[0022] The main detection channel 2 and the auxiliary channel 3 are arranged in parallel, and the main detection channel 2 is located below the auxiliary channel 3. The inlet end of the auxiliary channel 3 is connected to the vertical cavity 10, and an arc-shaped baffle 13 is installed at the port of the auxiliary channel 3. A micro constant flow pump 12 is installed inside the auxiliary channel 3. Relying on the constant flow delivery characteristics of the micro constant flow pump 12, the auxiliary flow channel 3 does not require ultrasonic flow detection. Even if a small number of tiny air bubbles remain in the liquid flow, it will not have a significant impact on the overall measurement results. At the same time, the ultrasonic waves focus only on accurately detecting the pure liquid flow after removing air bubbles inside the main detection flow channel 2. By coordinating the flow ratio of the main detection flow channel 2 and the auxiliary flow channel 3, the overall flow data of the pipeline can be obtained. Combined with the temperature difference parameters of the pipeline medium, the heat consumption can be accurately calculated. This dual-flow channel structure design avoids the scattering and interference of residual air bubbles on the ultrasonic detection signal, eliminates the need for complex detection calculations of liquid flow containing micro bubbles, and ensures the stability of the flow ratio by relying on constant flow and pressure stabilization characteristics. It significantly improves the accuracy and reliability of flow and heat detection of ultrasonic heat meters from both structural and principle perspectives.

[0023] A flow replenishment component 6 is installed inside the main detection channel 2. The flow replenishment component 6 is used to introduce the liquid flow inside the bottom transverse cavity 9 into the main detection channel 2, and to distribute the introduced liquid flow in a ring shape to replenish the area near the inner wall of the main detection channel 2, thereby increasing the liquid flow velocity in the area near the inner wall of the main detection channel 2. The flow replenishment component 6 includes a throat portion 601 integrally formed with the inner wall of the main detection channel 2. The throat portion 601 protrudes inward to reduce the cross-sectional area at that section. The flow area is increased, thereby increasing the flow velocity at that section; an annular pressure equalization chamber 602 is provided inside the throat section 601, and a liquid suction port 603 is provided on the outer side of the annular pressure equalization chamber 602. The bottom transverse cavity 9 is connected to the annular pressure equalization chamber 602 through the liquid suction port 603; a liquid replenishment port 604 is provided on the inner side of the annular pressure equalization chamber 602. The liquid replenishment ports 604 are arranged in a ring array about the inside of the throat section 601. The annular pressure equalization chamber 602 is connected to the inside of the main detection flow channel 2 through the liquid replenishment port 604.

[0024] The flow replenishment component 6 utilizes Bernoulli's principle to achieve automatic flow replenishment. The inwardly protruding throat section 601 reduces the local flow cross-sectional area, increasing the flow velocity and generating negative pressure as the liquid flows through it. This negative pressure suction draws the clean liquid, after bubble separation within the bottom transverse cavity 9, into the annular pressure equalization chamber 602 through the suction port 603. The annular pressure equalization chamber 602 stabilizes and equalizes the absorbed liquid, eliminating pressure differences. The liquid is then evenly sprayed into the area near the inner wall of the main detection channel 2 through the replenishment ports 604 arranged in a ring array, thereby increasing the flow velocity of the low-velocity fluid at the pipe wall. This structure effectively improves the uneven flow profile problem in conventional pipelines, where the fluid velocity is high at the center and slow at the pipe wall. It weakens the interference of the pipe wall boundary layer on ultrasonic detection, making the flow field inside the main detection channel 2 more stable and symmetrical, reducing measurement errors caused by uneven flow velocity distribution. Furthermore, this structure requires no additional driving components, relying on the fluid's own power to complete the replenishment. Its simple structure and stable operation further enhance the detection accuracy and measurement stability of the ultrasonic heat meter.

[0025] An exhaust assembly 8 is installed at the top of the vertical cavity 10. The exhaust assembly 8 includes an air collection hood 801 that is connected to the vertical cavity 10. A hydrophobic and breathable membrane 802 is fixedly connected inside the air collection hood 801, and an electromagnetic exhaust valve 803 is provided at the top of the hydrophobic and breathable membrane 802. A miniature diaphragm vacuum pump 804 is installed at the top of the air collection hood 801.

[0026] The air bubbles collected in the vertical cavity 10 of the water collection chamber float upward due to their own buoyancy, eventually converging at the top of the vertical cavity 10 and entering the air collection hood 801. Then, the micro diaphragm air pump 804 realizes one-way automatic exhaust, which promptly discharges the accumulated air bubbles to the outside of the instrument, avoiding long-term gas retention that affects the stability of the flow field and the accuracy of measurement.

[0027] The main detection channel 2 is internally fixedly connected to a second replenishment mesh plate 16. The second replenishment mesh plate 16 is located upstream of the diversion and replenishment component 6 in the direction of water flow. It can perform initial rectification of the original liquid flow entering the main detection channel 2, disperse turbulence, regulate the flow field, and filter out small impurities. The detection pipe section 1 is internally fixedly connected to a first distribution mesh plate 15. The first distribution mesh plate 15 is located at the outlet end of the main detection channel 2 and the auxiliary channel 3. It can perform secondary rectification and pressure stabilization of the mixed liquid flow from the two channels, so that the outflowing liquid flow can smoothly flow into the downstream pipe network.

[0028] Working principle: The liquid flow entering the detection tube section 1 first contacts the guide arc plate 5. Under the action of its own buoyancy, most of the bubbles are concentrated in the upper half of the detection tube section 1. Under the guiding action of the guide arc plate 5, most of the bubbles are guided above the guide arc plate 5 along with the liquid flow carrying them, and enter the water collection chamber through the first bubble suction gap. The remaining liquid flow enters the cavity between the guide arc plate 5 and the separation component 4 from the bottom end of the guide arc plate 5, and climbs upward along the guide lifting plate 401. During the climbing process, the bubbles float further upward. When they climb to the descending plate 402, the liquid flow at the bottom sinks into the lower water drop chamber 405 through the descending mesh 403 and enters the main detection channel 2 for detection. The liquid flow carrying the remaining bubbles above enters the water collection chamber through the second bubble suction gap. The liquid flow containing air bubbles gathers in the water collection cavity, which provides space for the air bubbles to float naturally. The floating air bubbles gather at the gas collection hood 801 and are discharged outward under the action of the micro diaphragm pump 804. The liquid flow at the vertical cavity 10 is drawn into the auxiliary flow channel 3 under the action of the micro constant flow pump 12, and flows at a constant flow rate in the auxiliary flow channel 3. When the liquid flow inside the main detection channel 2 passes through the throat section 601, the flow velocity increases due to the narrowing of the pipe diameter, generating a negative pressure effect. Using the negative pressure effect, the liquid in the bottom transverse cavity 9 is drawn into the annular equalizing chamber 602 through the suction port 603, and then replenished into the main detection channel 2 through the replenishment port 604. This replenishes the position near the pipe wall to increase the flow velocity of the liquid at the pipe wall, thereby reducing the difference in velocity between the inside and outside of the flow velocity profile during detection. Since both the suction port 603 and the auxiliary flow channel 3 have a suction effect on the water collection cavity, a negative pressure area is formed at the bubble gap, which is used to actively introduce the liquid containing bubbles into the water collection cavity.

[0029] The technical scope of this invention is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this invention, and all such modifications and variations should fall within the protection scope of this invention.

Claims

1. A smart ultrasonic heat meter, characterized in that, The device includes a detection tube section, which has a main detection channel and an auxiliary channel inside. The inlet end of the main detection channel is equipped with a separation component, and a guide arc plate is provided above the separation component. A first bubble-absorbing gap is provided between the guide arc plate and the inner wall of the detection tube section. A second bubble-absorbing gap is provided between the top of the separation component and the guide arc plate. A water collection chamber enclosure is fixedly connected to the outer wall of the main detection channel. A partition plate is fixedly connected to the outer wall of the main detection channel port. The water collection chamber enclosure and the partition plate separate the cavity between the main detection channel and the detection tube section into a water collection chamber. The water collection chamber includes a bottom horizontal cavity and a vertical cavity. The vertical cavity is connected to both the first and second bubble-absorbing gaps, and the vertical cavity can provide suction at the first and second bubble-absorbing gaps to assist in drawing the bubble-containing liquid flow into the water collection chamber. The main detection channel is equipped with a flow replenishment component, which is used to introduce the liquid flow inside the bottom transverse cavity into the main detection channel and to distribute the introduced liquid flow in a ring shape to replenish the area inside the main detection channel near the inner wall, thereby increasing the flow velocity of the liquid flow in the area inside the main detection channel near the inner wall.

2. The intelligent ultrasonic heat meter according to claim 1, characterized in that: The main detection channel and the auxiliary channel are arranged in parallel, with the main detection channel located below the auxiliary channel. The inlet end of the auxiliary channel is connected to the vertical cavity, and an arc-shaped baffle is installed at the port of the auxiliary channel. A micro constant flow pump is installed inside the auxiliary channel.

3. The intelligent ultrasonic heat meter according to claim 1, characterized in that: A heat meter integrator is installed at the top of the detection pipe section. An ultrasonic generator is electrically connected to the side of the heat meter integrator. The detection end of the ultrasonic generator is inserted into the inner wall of the main detection channel and is located downstream of the diversion and replenishment component in the direction of water flow.

4. The intelligent ultrasonic heat meter according to claim 1, characterized in that: The separation component includes a flow guide plate, an integrally connected flow reducer plate above the flow guide plate, a plurality of flow reducer mesh holes evenly opened inside the flow reducer plate, and an arc-shaped folding plate fixedly connected to the top of the flow reducer plate.

5. The intelligent ultrasonic heat meter according to claim 4, characterized in that: The flow guide plate, flow deflector plate, and partition plate together form a drainage cavity, which is connected to the inlet end of the main detection channel.

6. The intelligent ultrasonic heat meter according to claim 1, characterized in that: The flow replenishment component includes a throat section integrally formed with the inner wall of the main detection channel. The throat section protrudes inward to reduce the interception area at that section, thereby increasing the flow velocity at that section.

7. The intelligent ultrasonic heat meter according to claim 6, characterized in that: The throat section has an annular pressure equalization chamber inside, and a suction port is provided on the outside of the annular pressure equalization chamber. The bottom transverse cavity is connected to the annular pressure equalization chamber through the suction port.

8. The intelligent ultrasonic heat meter according to claim 7, characterized in that: The inner side of the annular equalizing chamber is provided with a liquid replenishment port, which is arranged in a ring array about the inside of the throat section. The annular equalizing chamber is connected to the inside of the main detection flow channel through the liquid replenishment port.

9. The intelligent ultrasonic heat meter according to claim 1, characterized in that: An exhaust assembly is installed at the top of the vertical cavity. The exhaust assembly includes a gas collection hood that communicates with the vertical cavity. A hydrophobic and breathable membrane is fixedly connected inside the gas collection hood, and an electromagnetic exhaust valve is provided at the top of the hydrophobic and breathable membrane. A miniature diaphragm pump is installed at the top of the gas collection hood.

10. The intelligent ultrasonic heat meter according to claim 1, characterized in that: The main detection channel is internally fixedly connected to a second replenishing mesh plate, which is located upstream of the diversion and replenishment component in the water flow direction. The detection pipe section is internally fixedly connected to a first distribution mesh plate, which is located at the outlet end of the main detection channel and the auxiliary channel.

Images