A composite vortex flowmeter

Abstract

The present invention provides a compound vortex flowmeter, which relates to the field of fluid measurement technology. The compound vortex flowmeter includes a flowmeter main unit, a control unit and a display unit. The flowmeter main unit includes a tube body, a vortex generator and a detection component. The vortex generator is installed in the tube body, and the vortex generator is provided with a detection channel. The detection component includes a thermal flight time detection and a calorimetric sensor element, and the thermal flight time detection and calorimetric sensor element is located in the detection channel; wherein the thermal flight time detection and calorimetric sensor element is a silicon-based sensor, and is connected to the control unit. The compound vortex flowmeter can detect the volume flow, mass flow and density of the fluid in the tube body that generates a vortex state and the fluid that does not generate a vortex state, thereby achieving the purpose of expanding the measurement dynamic range, and can measure fluids in different states at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of fluid measurement, and in particular to a compound vortex flowmeter. Background Art

[0002] Vortex flowmeters have the characteristics of high detection accuracy, simple structure, no moving mechanical parts, high reliability, and low maintenance, and are widely used in the flow measurement of liquids and gases in industrial processes. The current vortex flowmeter has a small range and cannot measure when the Reynolds number is lower than the vortex occurrence, thus limiting the dynamic range of the measurement; the size of the standard vortex generator also causes the vortex flowmeter to have a large pressure loss. In addition, the vortex flowmeter is a pure volume measurement and cannot measure the mass flow of the fluid, especially the density of the fluid. As a result, in current practical applications, such as steam metering, there are large deviations. Summary of the invention

[0003] The purpose of the present invention includes providing a composite vortex flowmeter to solve the technical problems of the existing vortex flowmeter, such as small measurement dynamic range, large pressure loss, and inability to measure the mass flow rate of the fluid, especially the density of the fluid.

[0004] In order to solve the above problems, the present invention provides a composite vortex flowmeter, comprising a flowmeter main unit, a control unit and a display unit, wherein the flowmeter main unit comprises a tube body, a vortex generator and a detection assembly, wherein the vortex generator is installed in the tube body, the vortex generator is provided with a detection channel, the detection assembly is installed in the tube body, and the detection thermal flight time and calorimetric sensing element of the detection assembly is located in the detection channel, wherein the detection thermal flight time and calorimetric sensing element are composed of a first temperature sensor, a micro heat source sensor, a second temperature sensor and an ambient temperature sensor which are sequentially arranged at intervals on the detection surface of a silicon substrate;

[0005] The thermal time-of-flight and calorimetric sensing elements are deposited on a thin film above the thermal insulation cavity of the silicon substrate;

[0006] The thermal time-of-flight and calorimetric sensing element and the display unit are both connected to the control unit.

[0007] Optionally, the detection channel is linear or a Venturi channel, and the length direction of the detection channel is set at an angle to the horizontal plane.

[0008] Optionally, the first port of the detection channel is higher than the second port of the detection channel, and along the flow direction of the fluid in the tube body, the detection channel is inclined toward the downstream direction of the fluid from the first port to the second port.

[0009] Optionally, the angle between the length direction of the detection channel and the flow direction of the fluid is 60° to 120°.

[0010] Optionally, the vortex generator is trapezoidal, and the height of the vortex generator is 0.18 to 0.22 times the inner diameter of the tube body.

[0011] Optionally, the thermal time-of-flight detection and calorimetric sensing elements are arranged on the side walls of the detection channel.

[0012] Optionally, the compound vortex flowmeter can measure a dynamic range of 100:1 to 300:1.

[0013] Optionally, a flow field direct current distributor and a flow field rectifier are provided at the fluid inlet end of the tube body.

[0014] Optionally, the compound vortex flowmeter also includes a head and a connecting assembly, the connecting assembly is connected between the tube body and the head, an installation cavity is provided in the head, and the control unit is accommodated in the installation cavity; the display unit includes a display, and the display is installed at a port of the installation cavity.

[0015] Optionally, the detection component is connected to the control unit via a signal connector, and the signal connector is made of a high-temperature insulation material.

[0016] Optionally, the connecting component includes a heat-insulating sleeve, which is connected between the tube body and the meter head and covers the signal connector and a portion of the detection component extending out of the tube body.

[0017] The compound vortex flowmeter provided by the present invention has a pressure difference between the two ends of the detection channel when the pipe body of the compound vortex flowmeter is connected to a pipeline with a corresponding pipe diameter for fluid flow, and the fluid flows through the vortex generator, and when the Reynolds number of the fluid is large, the fluid flows through the vortex generator to generate a vortex, and the vortex flows through the detection channel under the action of the pressure difference. Since the fluid is a pulsating flow, in the process of the pulsating flow passing through the thermal flight time detection and calorimetric sensing element, the first temperature sensor and the second temperature sensor of the thermal flight time detection and calorimetric sensing element can detect the maximum and minimum values ​​of the time and amplitude of the temperature field on the sensing element brought by the pulsating flow, and transmit the corresponding signal to the control unit, and the control unit calculates the number of pulsations or the number of vortices per unit time, and directly associates it with the volume flow rate of the fluid in the pipe body by comparing it with the flow value of the standard during manufacturing, thereby obtaining a first set of volume flow rates of the fluid. At the same time, when the pulsating flow passes through the detection thermal flight time and calorimetric sensing element, the second group of volume flow is obtained by measuring the heat transfer time between sensors at a fixed distance; the micro-heat source sensor associates the amplitude change of the heat conduction of the fluid in the detection channel with the mass flow of the fluid flowing through the tube body, thereby obtaining the mass flow of the fluid, and the control unit compares the values ​​of the two groups of volume flow, and calculates the fluid pressure through the value of the mass flow and the value of the ambient temperature measured by the ambient temperature sensor. Since the detection thermal flight time and calorimetric sensing element has an excellent thermal insulation structure, its fast response time can simultaneously measure the static characteristics of the fluid between two eddies or pulsating flows. At this time, the micro-heat source sensor itself can measure the value of thermal conductivity, and the signal of the modulated wave on the micro-heat source sensor received by the temperature sensor is a direct measurement of the diffusion coefficient of the fluid, and the density of the fluid can be measured through the values ​​of thermal conductivity and heat capacity.

[0018] When the Reynolds number of the fluid is small, no vortex street is generated in the tube body. However, the design of the flow channel of the present invention is that there is still a pressure difference between the fluids on both sides of the detection channel, so that the fluid with the corresponding flow rate can still flow through the detection channel, and flow through the first temperature sensor, micro heat source sensor, second temperature sensor and ambient temperature sensor on the detection thermal flight time and calorimetric sensing element in sequence. The temperature field change signal generated by the fluid measured by the detection thermal flight time and calorimetric sensing element is transmitted to the control unit, and the control unit stores the corresponding relationship between the temperature difference and the mass flow rate after calibration by the standard device, so as to obtain the corresponding mass flow rate, and the measurement data of the time function of the temperature field change between different temperature sensors and the precise distance between the known sensors can obtain the volume flow rate of the fluid. Therefore, this method can simultaneously measure the volume flow rate and mass flow rate of the fluid to be detected.

[0019] The above-measured values ​​of volume flow, mass flow, density, vortex frequency, pressure and cumulative flow can be displayed on the display unit, and the user can intuitively obtain the above information according to the display content of the display unit.

[0020] The composite vortex flowmeter of the present application can detect the volume flow rate and mass flow rate of the vortex fluid flowing through the main unit of the flowmeter and the fluid that has not generated a vortex state, thereby achieving the purpose of ultra-low flow measurement and expanding the dynamic range of measurement. The measured mass flow rate and the density and temperature of the fluid and the fluid pressure calculated therefrom further expand the measurement capability of the traditional vortex flow rate. For fluids with variable density, especially steam, the measurement accuracy of the flowmeter can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0022] Figure 1 A first schematic diagram of a compound vortex flowmeter provided by the present invention;

[0023] Figure 2 A second schematic diagram of the compound vortex flowmeter provided by the present invention

[0024] Figure 3 for Figure 2 Exploded view of the compound vortex flowmeter;

[0025] Figure 4 A schematic diagram of a thermal flight time detection and calorimetric sensing element in a composite vortex flowmeter provided by the present invention;

[0026] Figure 5 This is a schematic diagram of the vortex generator in the compound vortex flowmeter provided by the present invention.

[0027] Description of reference numerals:

[0028] 10-flow meter main unit; 100-tube body; 110-flow field direct current device; 120-flow field rectifier; 200-vortex street generator; 210-detection channel; 211-first port; 212-second port; 300-detection component; 310-detection thermal flight time and calorimetric sensor element; 311-silicon substrate; 312-film; 313-first temperature sensor; 314-micro heat source sensor; 315-second temperature sensor temperature sensor; 316-ambient temperature sensor; 317-connection line; 318-soldering pad; 400-connection assembly; 410-insulation sleeve; 420-screw; 500-meter head; 510-installation cavity; 520-front cover; 530-front sealing ring; 540-rear sealing ring; 550-rear cover; 560-plug; 600-display; 700-control unit; 800-industrial interface circuit board; 900-signal connector. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] This embodiment provides a compound vortex flowmeter, including a flowmeter main unit 10, a control unit 700 and a display unit. Figure 1-Figure 3 As shown, the flow meter main unit 10 includes a pipe body 100, a vortex generator 200 and a detection assembly 300. The vortex generator 200 is installed in the pipe body 100. The vortex generator 200 is provided with a detection channel 210. The detection assembly 300 is installed in the pipe body 100, and the detection thermal flight time and calorimetric sensor element 310 of the detection assembly 300 are located in the detection channel 210. Figure 4 As shown, the thermal flight time detection and calorimetry sensing element 310 includes a silicon substrate 311, and the detection surface of the silicon substrate 311 is provided with a first temperature sensor 313, a micro heat source sensor 314, a second temperature sensor 315 and an ambient temperature sensor 316 arranged in sequence; the first temperature sensor 313, the second temperature sensor 315, the micro heat source sensor 314, the ambient temperature sensor 316 and the display unit are all connected to the control unit 700.

[0031] The compound vortex flowmeter provided in this embodiment includes a detection component 300 for detecting fluid-related physical characteristic parameters, a control unit 700 for converting the detected physical characteristic parameters into target parameters, and a display unit for displaying the detected physical characteristic parameters and the converted target parameters, wherein the detection component 300 includes a tube body 100 for the fluid to be detected to flow through, a vortex generator 200, and a detection thermal flight time and calorimetric sensor element 310 for detecting the fluid in the detection channel 210 in the vortex generator 200, and the detection thermal flight time and calorimetric sensor element 310 adopts a MEMS thermal flight time and calorimetric sensor element.

[0032] When in use, the tube body 100 of the compound vortex flowmeter is connected to a fluid pipeline of a corresponding diameter. The fluid flows through the vortex generator 200, and the pressure difference at both ends of the detection channel 210 forces the fluid to flow through the detection channel. When the Reynolds number of the fluid is large, a vortex will be generated in the tube body 100. The fluid flowing through the detection channel 210 under the action of the pressure difference is a pulsating flow. During the process of the pulsating flow passing through the detection thermal flight time and calorimetric sensor element 310, the first temperature sensor 313 and the second temperature sensor 315 on the detection thermal flight time and calorimetric sensor element 310 can detect the maximum and minimum values ​​of the time and amplitude of the temperature field on the sensor element brought by the pulsating flow, and transmit the corresponding signal to the control unit 700. The control unit 700 calculates the number of pulsations or vortex numbers per unit time, and directly associates it with the volume flow rate of the fluid in the tube body 100 by comparing it with the flow value of the standard during manufacturing, thereby obtaining a first set of volume flow rates of the fluid. At the same time, when the pulsating flow passes through the detection thermal flight time and calorimetric sensing element 310, the second group of volume flow is obtained by measuring the heat transfer time between the first temperature sensor 313 and the micro heat source sensor 314 or the micro heat source sensor 314 and the second temperature sensor 315 at a fixed distance; the micro heat source sensor 314 associates the amplitude change of the heat conduction of the fluid in the detection channel with the mass flow of the fluid flowing through the tube body 100, thereby obtaining the mass flow of the fluid. The control unit 700 compares the values ​​of the two groups of volume flow, and calculates the fluid pressure through the value of the mass flow and the value of the ambient temperature measured by the ambient temperature sensor. Since the detection thermal flight time and calorimetric sensing element 310 has an excellent thermal insulation structure, its fast response time can simultaneously measure the static characteristics of the fluid between two eddies or pulsating flows. At this time, the micro heat source sensor itself can measure the value of thermal conductivity, and the signal of the modulated wave on the micro heat source sensor received by the temperature sensor at this time is a direct measurement of the diffusion coefficient of the fluid. Through the values ​​of thermal conductivity and heat capacity, the density of the fluid can be measured.

[0033] When the Reynolds number of the fluid is small, no vortex street is generated in the tube body 100. However, the flow channel design of the present invention still has a pressure difference between the fluids on both sides of the detection channel 210, so that the fluid with the corresponding flow rate can still flow through the detection channel 210, and flow through the first temperature sensor 313, the micro-heat source sensor, the second temperature sensor 314 and the ambient temperature sensor 316 on the detection thermal flight time and calorimetric sensor element 310 in sequence. The temperature field change signal generated by the fluid measured by the detection thermal flight time and calorimetric sensor element 310 is transmitted to the control unit 700, and the control unit 700 stores the corresponding relationship between the temperature difference and the mass flow rate after calibration by the standard device, so as to obtain the corresponding mass flow rate, and the measurement data of the time function of the temperature field change between different temperature sensors and the precise distance between the known sensors can obtain the volume flow rate of the fluid. Therefore, this method can simultaneously measure the volume flow rate and mass flow rate of the fluid to be detected.

[0034] The above-measured values ​​of volume flow, mass flow, density, vortex frequency, pressure and cumulative flow can be displayed on the display unit, and the user can intuitively obtain the above information according to the display content of the display unit.

[0035] The composite vortex flowmeter of the present application can detect the volume flow and mass flow of the vortex fluid flowing through the main unit of the flowmeter and the fluid that has not generated a vortex state, so as to achieve the purpose of ultra-low flow measurement and expand the dynamic range of measurement. The measured mass flow rate and the density and temperature of the fluid and the fluid pressure calculated therefrom further expand the measurement capability of the traditional vortex flow. For fluids with variable density, especially steam, the measurement accuracy of the flowmeter can be greatly improved. Preferably, the silicon substrate 311 can be made of silicon, glass, ceramics and other materials with a heat-insulating structure to effectively eliminate the reliability problem of the application of thermal sensing technology in vortex measurement technology; specifically, the composite vortex flowmeter of the present application is not limited to gases, liquids and steam, but is also applicable to fluids of multiphase media.

[0036] Specifically, the compound vortex flowmeter of the present application can measure a dynamic range of 100:1 to 300:1. Preferably, the dynamic range is extended to 150:1.

[0037] Optionally, in this embodiment, if Figure 4As shown, the first temperature sensor 313, the micro heat source sensor 314 and the second temperature sensor 315 on the detection surface of the thermal flight time and the calorimetric sensor element 310 are all placed on the film 312, and the film 312 is a heat insulation cavity. The film 312 can reduce the additional heat conduction effect of the silicon substrate 311 temperature on the first temperature sensor 313, the micro heat source sensor 314 and the second temperature sensor 315 to detect the fluid temperature, thereby improving the accuracy and dynamic response time of the first temperature sensor 313, the micro heat source sensor 314 and the second temperature sensor 315 in detecting the fluid temperature, and correspondingly improving the accuracy of the compound vortex flowmeter in detecting the fluid flow.

[0038] In this embodiment, Figure 4 As shown, the ambient temperature sensor 316 for detecting the thermal flight time and the calorimetric sensor element 310 is installed on the detection surface and is located on the silicon substrate 311 with better thermal conductivity and away from the micro-heat source sensor 314. The ambient temperature sensor 316 can detect the ambient temperature of the fluid in the detection channel 210. When the pressure difference between the two pulsating flows generating the vortex street in the tube body 100 or the two ends of the detection channel 210 is not enough to form a flowing fluid therein, the fluid is in a relatively static state, and the modulation signal of the thermal flight time measured by the first temperature sensor 313 or the second temperature sensor 315 through the micro-heat source sensor 314 is associated with the thermal diffusion coefficient of the fluid, and the control unit 700 receives the relevant signal and obtains the thermal diffusion coefficient of the fluid; the heat dissipation of the micro-heat source sensor 314 itself is associated with the thermal conductivity of the fluid, and the control unit 700 receives the relevant signal and obtains the thermal conductivity of the fluid; the temperature rise per unit time measured by the first temperature sensor 313 or the second temperature sensor 315 is associated with the specific heat capacity of the fluid, and the control unit 700 receives the relevant signal and obtains the specific heat capacity of the fluid, thereby calculating the density value of the fluid. Specifically, in steam metering where the steam can be in the form of a saturated or unsaturated medium, even if the fluid pressure does not change and the steam medium is the same, the density often changes significantly during use; compared to the prior art, since it is impossible to simulate the actual usage conditions, the calibration of the compound vortex flowmeter cannot be confirmed, and water flow is used as a substitute, resulting in trade measurement deviations and disputes; the compound vortex flowmeter of the present application is capable of online measurement of multiple fluid physical parameters including density, and can correspond the detected steam density to the standard density value of the fluid corresponding to the fluid pressure determined by the mass flow rate and volume flow rate, thereby obtaining the state of change of the fluid physical properties and its standard volume flow parameters, thereby effectively solving the technical key of density change in steam measurement and ensuring the integrity and fairness of steam metering.

[0039] In addition, the first temperature sensor 313 and the second temperature sensor 315 are made of thermosensitive materials. Affected by the ambient temperature, the fluid temperature measured by the first temperature sensor 313 and the second temperature sensor 315 can be calibrated according to the ambient temperature measured by the ambient temperature sensor 316 to eliminate the influence of the ambient temperature on the resistance of the first temperature sensor 313 and the second temperature sensor 315 due to the detection temperature, so as to obtain a more accurate actual temperature of the fluid. In addition, the first temperature sensor 313, the micro-heat source sensor 314, the second temperature sensor 315 and the ambient temperature sensor 316 are collectively combined into a single thermal flight time detection and calorimetric sensing element 310. Then, the single thermal flight time detection and calorimetric sensing element 310 can realize the volume flow rate, mass flow rate, fluid density, fluid temperature, pressure and thermal physical parameters of the fluid in the thermal flight time and calorimetric measurement mode, and has a simple structure and strong functionality. Specifically, the signals of each of the above sensors can be connected to each pad 318 through the corresponding connection line 317.

[0040] Specifically, in this embodiment, Figure 5 As shown, the detection channel 210 may be linear or Venturi-shaped, and the length direction of the detection channel 210 is set at an angle to the horizontal plane. Figure 5 The arrow in the figure indicates the flow direction of the fluid. The detection channel 210 extends in the radial section of the tube body 100, and the detection channel 210 is not horizontally arranged. The ports at both ends of the detection channel 210 are located at different heights, which can increase the pressure difference on both sides of the detection channel 210. Even when the Reynolds number is lower than the vortex street occurrence frequency and there is no pulsating flow in the fluid, there will still be continuous fluid flowing through the detection channel 210 due to the large pressure difference on both sides of the detection channel 210. The detection thermal flight time and the calorimetric sensor element 310 measure the continuous fluid accordingly to obtain the volume flow rate and mass flow rate of the fluid, thereby enhancing the detection sensitivity of the detection thermal flight time and the calorimetric sensor element 310 to the low Reynolds number fluid, so that it can achieve a larger dynamic measurement range.

[0041] Specifically, in this embodiment, Figure 5As shown, the first port 211 of the detection channel 210 is higher than the second port 212 of the detection channel 210. Along the flow direction of the fluid in the tube body 100, the detection channel 210 is inclined from the first port 211 to the second port 212 toward the downstream direction of the fluid. The particles in the fluid are mostly in the lower area of ​​the flow channel due to the influence of gravity. The first port 211 of the detection channel 210 is located above and close to the front end of the vortex generator 200, and the second port 212 of the detection channel 210 is located below and close to the rear end of the vortex generator 200, thereby effectively reducing the contamination of the detection thermal time of flight and the calorimetric sensor element 310 caused by the intrusion of impurities in the fluid into the detection channel 210. Accordingly, the composite vortex flowmeter has the ability to resist contamination. Of course, the detection thermal time of flight and calorimetric sensor element 310 of the present application is made of MEMS thermal time of flight and calorimetric sensing. When the thermal conductivity of impurities in the fluid is poor, the thermal modulation signal of the detection thermal time of flight and calorimetric sensor element 310 is less affected by impurity contamination and can still maintain its measurement function. Preferably, the control unit 700 of the compound vortex flowmeter can be connected to an alarm unit. When impurities in the fluid cause contamination to the thermal flight time detection and calorimetric sensor element 310, which has a significant impact on its detection accuracy, the control unit 700 can control the alarm unit to be turned on based on the contamination signal transmitted by the thermal flight time detection and calorimetric sensor element 310. The alarm unit sends out an alarm to allow the user to maintain the compound vortex flowmeter.

[0042] Specifically, the angle between the length direction of the detection channel 210 and the flow direction of the fluid may be 60° to 120°.

[0043] Optionally, in this embodiment, the thermal flight time and calorimetric sensing element 310 can be disposed on the side wall of the detection channel 210. The thermal flight time and calorimetric sensing element 310 is less affected by environmental vibration when measuring the fluid, thereby improving the detection accuracy of the thermal flight time and calorimetric sensing element 310 for each physical parameter of the fluid, and correspondingly further improving the detection accuracy of the compound vortex flowmeter.

[0044] Specifically, in this embodiment, Figure 5As shown, the vortex generator 200 can be trapezoidal, and the front end size of the vortex generator 200 is 0.18 to 0.22 times the inner diameter of the tube body 100. The shape and size of the vortex generator 200 directly determine the stability of the vortex generated in the fluid. In the existing vortex flowmeter, in order to obtain a relatively stable vortex in the tube body 100, the front end size of the trapezoidal vortex generator 200 is generally designed to be 0.281 times the inner diameter of the tube body 100. The composite vortex flowmeter of the present application can detect the volume flow rate and mass flow rate of the fluid in the state of no vortex generation, so the size requirement of the vortex generator 200 is relatively small, and the front end size of the vortex generator 200 is set to 0.18 to 0.22 times the inner diameter of the tube body 100. On the basis of realizing the detection of a large dynamic range flow by the composite vortex flowmeter, the volume of the vortex generator 200 can be reduced, thereby reducing the pressure loss caused by the vortex generator 200 to the internal fluid of the tube body 100. Specifically, the full-scale pressure loss of the compound vortex flowmeter of the present application is 3 / 4 to 1 / 2, preferably 1 / 2, of that of the existing conventional vortex flowmeter.

[0045] In addition, when the vortex generator 200 is trapezoidal, the larger side of the vortex generator 200 serves as the front end face, and the lateral dimension of the front end face is larger than the rear end. When the particles flow through the vortex generator 200, they will be blocked by the front end face of the vortex generator 200 and will have difficulty reaching the entrance of the detection channel 210, thereby further improving the anti-pollution performance of the vortex flowmeter and correspondingly further ensuring the accuracy of detecting the thermal flight time and the calorimetric sensor element 310 for detecting various physical parameters of the fluid.

[0046] Optionally, in this embodiment, if Figure 1-Figure 3As shown, the compound vortex flowmeter can also include a header 500 and a connecting assembly 400, wherein the connecting assembly 400 is connected between the tube body 100 and the header 500, wherein an installation cavity 510 is provided in the header 500, wherein the control unit 700 is accommodated in the installation cavity 510; and the display unit includes a display 600, wherein the display 600 is installed at the port of the installation cavity 510. This is a specific form of the compound vortex flowmeter, wherein the header 500 can accommodate the control unit 700 and the display 600, and the position of the control unit 700 and the display 600 are fixed and protected, thereby improving the stability of the control unit 700 and the display 600 in use; in addition, the connecting assembly 400 connects the tube body 100 and the header 500 as a whole, so that they constitute a complete and independent flow metering device, and the transportation, storage and use of the vortex flowmeter are relatively convenient. Preferably, a battery can be installed in the meter head 500 or the connection component 400, and the battery is connected to the detection component 300, the control component and the display 600 to power them. When the vortex flowmeter is used, data security can be guaranteed, and it is no longer restricted by the location of the external power supply, and it is more convenient to use. Specifically, the tube body 100 can be made of metal or engineering plastics, and the end of the tube body 100 can be connected to the pipeline through a flange or a threaded section; the connection component 400 can be connected to the tube body 100 and the meter head 500 through a screw 420.

[0047] Specifically, in this embodiment, Figure 3 As shown, an industrial interface circuit board 800 can also be installed in the meter head 500, and the industrial interface circuit board 800 is electrically connected to the control unit 700 and the display unit. The industrial interface circuit board 800 includes various types of wired or wireless conventional interfaces or customer-specified interfaces to improve the functionality of the vortex flowmeter. Preferably, the front end of the meter head 500 can be covered with a front cover 520 with a window, and a front sealing ring 530 is provided between the front cover 520 and the front end of the meter head 500, and the display 600 can be displayed through the window; the rear end of the meter head 500 can be covered with a rear cover 550, and a rear sealing ring 540 is provided between the rear cover 550 and the rear end of the meter head 500, then the front cover 520, the front sealing ring 530, the rear cover 550 and the rear sealing ring 540 can jointly block the installation cavity 510 into an approximately sealed chamber to reduce the damage caused by environmental factors to the control elements, display elements, etc. in the installation cavity 510. Specifically, when the industrial interface circuit board 800 is wired, its output wires can be sealed by the plug 560 .

[0048] Specifically, in this embodiment, Figure 3As shown, the detection assembly 300 and the control unit 700 can be connected through a signal connector 900, and the signal connector 900 is made of a high-temperature insulation material. When the vortex flowmeter is used for measuring high-temperature steam, the signal connector 900 can block the influence of heat conduction on the working conditions of the control unit 700 on the basis of realizing the electrical connection between the detection assembly 300 and the control unit 700, thereby ensuring the normal operation of the control unit 700 and correspondingly ensuring the normal use of the vortex flowmeter. Specifically, the signal connector 900 can be made of high-temperature ceramics.

[0049] In this embodiment, Figure 2 and Figure 3 As shown, the connection assembly 400 may include a heat-insulating sleeve 410, which is connected between the tube body 100 and the meter head 500, and covers the signal connector 900 and the detection assembly 300 that extend out of the tube body 100. The heat-insulating sleeve 410 covers the outside of the signal connector 900 and the detection assembly 300, and can provide heat insulation when the vortex flowmeter is used for high-temperature measurement, thereby ensuring the normal operation of the control unit 700. Of course, in some embodiments, when the vortex flowmeter is only used to measure normal temperature or low temperature fluids, such as Figure 1 As shown, the connection assembly 400 may not be provided with the heat insulating sleeve 410 .

[0050] Optionally, in this embodiment, if Figure 3 As shown, a flow field direct current device 110 and a flow field rectifier 120 can be provided at the fluid inlet end of the tube body 100. The provision of the flow field direct current device 110 and the flow field rectifier 120 can provide a stable flow field for the detected fluid, so as to improve the stability of the fluid flowing in the tube body 100, and correspondingly improve the measurement stability and accuracy of the vortex flowmeter for the fluid.

[0051] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0052] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A compound vortex flowmeter, characterized in that: The invention comprises a flow meter main unit (10), a control unit (700) and a display unit. The flow meter main unit (10) comprises a tube body (100), a vortex generator (200) and a detection assembly (300). The vortex generator (200) is installed in the tube body (100), and the front end size of the vortex generator (200) is 0.18 to 0.22 times the inner diameter of the tube body (100). The vortex generator (200) is provided with a detection channel (210). The detection channel (210) is linear, and the length direction of the detection channel (210) is arranged at an angle with the horizontal plane. The first port (211) of the detection channel (210) is higher than the detection channel (210). ), along the flow direction of the fluid in the tube body (100), the detection channel (210) is inclined from the first port (211) to the second port (212) toward the downstream direction of the fluid; the detection assembly (300) is installed on the tube body (100), and the detection thermal flight time and calorimetric sensing element (310) of the detection assembly (300) is located in the detection channel (210), wherein the detection thermal flight time and calorimetric sensing element (310) is composed of a first temperature sensor (313), a micro heat source sensor (314), a second temperature sensor (315) and an ambient temperature sensor (316) which are sequentially arranged at intervals on the detection surface of the silicon substrate (311); The thermal time-of-flight and calorimetric sensing element (310) is deposited on a thin film (312) above the thermal insulation cavity of the silicon substrate (311); The thermal flight time and calorimetric sensor element (310) and the display unit are connected to the control unit (700) to detect the volume flow rate and mass flow rate of the vortex fluid flowing through the flow meter main unit (10) and the fluid that has not generated a vortex state, and to detect the fluid density and fluid pressure of the vortex fluid flowing through the flow meter main unit (10).

2. The compound vortex flowmeter according to claim 1, characterized in that: The angle between the length direction of the detection channel (210) and the flow direction of the fluid is 60° to 120°.

3. The compound vortex flowmeter according to claim 1 or 2, characterized in that: The vortex generating body (200) is trapezoidal in shape.

4. The compound vortex flowmeter according to claim 1 or 2, characterized in that: The thermal flight time detection and calorimetric sensing element (310) is arranged on the side wall of the detection channel (210).

5. The compound vortex flowmeter according to claim 1 or 2, characterized in that: The compound vortex flowmeter can measure a dynamic range of 100:1 to 300:

1.

6. The compound vortex flowmeter according to claim 1 or 2, characterized in that: A flow field direct current device (110) and a flow field rectifier (120) are provided at the fluid inlet end of the tube body (100).

7. The compound vortex flowmeter according to claim 1 or 2, characterized in that: The compound vortex flowmeter further comprises a meter head (500) and a connection assembly (400), wherein the connection assembly (400) is connected between the tube body (100) and the meter head (500), an installation cavity (510) is provided in the meter head (500), and the control unit (700) is accommodated in the installation cavity (510); the display unit comprises a display (600), and the display (600) is installed at a port of the installation cavity (510).

8. The compound vortex flowmeter according to claim 7, characterized in that: The detection component (300) and the control unit (700) are connected via a signal connector (900), and the signal connector (900) is made of a high-temperature heat-insulating material.

9. The compound vortex flowmeter according to claim 8, characterized in that: The connecting component (400) comprises a heat-insulating sleeve (410), wherein the heat-insulating sleeve (410) is connected between the tube body (100) and the meter head (500), and covers the signal connecting piece (900) and the part of the detection component (300) extending out of the tube body (100).

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