TWI890013B - A gas flow measurement device - Google Patents

Abstract

A gas flow measurement device, comprising a sensing tube connected to a controller at one end, the controller includes an arithmetic processing unit electrically connected to each other, a differential pressure sensing element, a display element, and a solenoid valve, and a dynamic pressure hole is provided in the sensing tube , static pressure channel and connected to a measuring part, the measuring part has a dynamic pressure chamber and a static pressure chamber, the differential pressure sensing part is located between the dynamic pressure chamber and the static pressure chamber and senses the dynamic pressure chamber and the static pressure chamber The internal pressure gas generates a pressure difference signal. The solenoid valve has an exhaust pipe and a connecting pipe connected to the dynamic pressure chamber. The calculation processing unit controls the solenoid valve to open the exhaust pipe to discharge the water vapor in the sensing tube.

Description

Gas flow measurement device

The present invention relates to the technical field of fluid measurement equipment, and in particular to a gas flow measurement device.

Whether in industry or daily life, transporting gas through pipelines is a time-saving and cost-effective method. Gas state can vary depending on external factors, affecting operational safety and product yield. Therefore, controlling gas state is crucial.

Currently, using a pressure gauge to visually display pressure changes at each process step and provide insight into gas conditions in the process is a common measurement method. However, these pressure gauges are typically installed on the outer wall of a gas pipeline. These holes guide the gas near the wall outward through the pressure gauge to measure and display the pressure, providing only a means of gas pressure monitoring.

Another type of measuring structure is further connected to a conduit, and during measurement installation, the conduit is inserted into the gas pipeline. The conduit penetrates deep into the gas pipeline to guide the internal gas into the conduit and pass through the measuring structure located in the pipeline to obtain more precise measurement data.

However, when measuring through a connecting tube inserted into a gas pipeline, moisture in the air condenses inside the tube, affecting the gas flow rate within the tube. This can even cause blockage within the tube, affecting measurement results.

The present invention is a gas flow measurement device, which comprises:

A sensing tube, one end of which is connected to a controller and has a dynamic pressure channel and a static pressure channel extending axially therein. One end of the dynamic pressure channel and the static pressure channel are connected to a measuring portion and each has a dynamic pressure orifice and a static pressure orifice located at the other end.

The measuring part is located in the controller and has a dynamic pressure chamber and a static pressure chamber adjacent to each other. The dynamic pressure chamber is connected to the dynamic pressure channel and the static pressure chamber is connected to the static pressure channel.

The controller includes an electrically connected computational processing unit, a pressure differential sensor, a display element, and an electromagnetic valve. The pressure differential sensor is located between the dynamic pressure chamber and the static pressure chamber, and senses the pressure gas within the dynamic and static pressure chambers and generates a pressure differential signal. The electromagnetic valve has an exhaust pipe connected to the outside and a pipe connected to the dynamic pressure chamber. The computational processing unit receives and calculates the pressure differential signal. The computational processing unit calculates and obtains gas flow rate values and transmits them to the display element for display. The computational processing unit controls the electromagnetic valve to open the exhaust pipe to discharge water vapor and impurities within the dynamic and static pressure chambers and the sensing tube.

The present invention, through the interaction of the aforementioned structures, connects the electromagnetic valve to the dynamic pressure chamber via a pipe, and cooperates with the computational processing unit to control the electromagnetic valve to open the exhaust pipe, thereby providing a method for discharging moisture contained in the measured gas. This prevents moisture contained in the flowing gas from condensing inside the sensing tube and affecting the gas flow rate or causing blockage, thereby ensuring the accuracy of the measured values of the present invention. This is indeed a practical improvement and thereby achieves the purpose and utility of the present invention.

Please refer to Figures 1 to 9, the present invention provides a gas flow measurement device, including:

A sensing tube 10, one end of which is connected to a controller 30 and has an axially extending dynamic pressure channel 11 and static pressure channel 12 inside. One end of each of the dynamic pressure channel 11 and static pressure channel 12 is connected to a measuring unit 20 and has a dynamic pressure orifice 111 and a static pressure orifice 121 at the other end, respectively.

The measuring unit 20 is located in the controller 30 and has a dynamic pressure chamber 21 and a static pressure chamber 22 adjacent thereto. The dynamic pressure chamber 21 is connected to the dynamic pressure channel 11 and the static pressure chamber 22 is connected to the static pressure channel 12.

The controller 30 includes an operation processing unit 31, a pressure difference sensor 32, a display element 33, and an electromagnetic valve 34 that are electrically connected to each other. The pressure difference sensor 32 is located between the dynamic pressure chamber 21 and the static pressure chamber 22, and the pressure difference sensor 32 senses the pressure gas inside the dynamic pressure chamber 21 and the static pressure chamber 22 and generates a pressure difference signal (not shown). The electromagnetic valve 34 has an exhaust pipe 34 connected to the outside. 1 and a connecting pipe 342 connected to the dynamic pressure chamber 21. The processing unit 31 receives and calculates the pressure difference signal. The processing unit 31 calculates and obtains the gas flow rate value and the gas flow rate value and transmits them to the display element 33 for display. The processing unit 31 controls the electromagnetic valve 34 to open the exhaust pipe 341 to discharge water vapor and impurities in the dynamic pressure chamber 21, the static pressure chamber 22, and the sensing tube 10.

The aforementioned are the main technical features of the main embodiment of the present invention, which correspond to the content of the first item of the patent application in this case and provide a detailed understanding of the purpose and implementation of the present invention. The technical features described in the remaining subsidiary patent applications are intended to elaborate on or provide additional technical features of the content of the first item of the patent application, and are not intended to limit the scope of the first item of the patent application. It should be understood that the first item of the patent application in this case does not necessarily include the technical features described in the remaining subsidiary patent applications.

Continuing with the above description, the present invention's implementation, actual usage, and results are further detailed. As shown in Figures 1 through 7, the present invention's measurement installation involves inserting one end of a sensing tube 10, having a dynamic pressure orifice 111 and a static pressure orifice 121, into the gas pipeline 50 to be measured. The dynamic pressure orifice 111 is oriented in the direction A of gas flow within the tube, as indicated by the arrow in Figure 7. Consequently, pressurized gas can be guided from the dynamic pressure orifice 111, which is embedded within the gas pipeline 50, through the dynamic pressure passage 11 into the dynamic pressure chamber 21. Furthermore, the static pressure orifice 121 can guide gas from the gas pipeline 50 through the static pressure passage 12 into the static pressure chamber 22. A differential pressure sensor 32 located between the dynamic pressure chamber 21 and the static pressure chamber 22 senses the gas pressure within each chamber, respectively, and accurately measures and generates a pressure differential signal (not shown). The processing unit 31 receives and calculates the pressure differential signal, and uses digital circuitry to obtain the flow rate and flow rate values of the measured gas. The processing unit 31 then transmits the flow rate and flow rate values to a display element 33 for display (not shown).

Furthermore, as shown in Figures 3, 8, and 9, since the electromagnetic valve 34 of the present invention is connected to the dynamic pressure chamber 21 via a connecting pipe 342, and the electromagnetic valve 34 is controlled by the computational processing unit 31 to open the exhaust pipe 341, when the pressure gas passing through the dynamic pressure chamber 21 and the sensing tube 10 during the measurement process contains moisture, the gas containing moisture can be guided toward the electromagnetic valve 34 in the direction of the arrow in the figure via the connecting pipe 342 connecting the dynamic pressure chamber 21 and the electromagnetic valve 34, and then discharged through the exhaust pipe 341 (as shown by the arrow in Figure 9). This prevents moisture contained in the flowing gas from condensing into condensed water inside the sensing tube 10 and the measuring unit 20, thereby affecting the gas flow rate or causing blockage. This effectively ensures the accuracy of the measured values of the present invention, and is indeed a practical advancement.

The features of each component of the present invention will be described in further detail below. In Figures 1 through 9, the controller 30 includes an atmospheric pressure sensor 35 electrically connected to the static pressure chamber 22. The atmospheric pressure sensor 35 senses the pressure gas flowing from the dynamic pressure chamber 21 to the static pressure chamber 22 and generates an atmospheric pressure signal. The processing unit 31 receives and calculates the atmospheric pressure signal, and the processing unit 31 calculates and obtains a gas pressure value. The display element 33 further displays the gas pressure value.

Next, as shown in FIG. 3 , the controller 30 includes a temperature sensor 36 electrically connected to the measuring unit 20 . The temperature sensor 36 senses the temperature of the pressure gas within the dynamic pressure chamber 21 and the static pressure chamber 22 and generates a temperature signal. The processing unit 31 receives and calculates the temperature signal to obtain a gas temperature value, which is then displayed on the display element 33 .

Furthermore, the display element 33 is a touch screen for providing input, modifying calculation parameters, and controlling instructions.

Furthermore, the electromagnetic valve 34 is operated by the display element 33 to set the time interval for opening the exhaust pipe 341, so as to provide a method for discharging the residual liquid inside according to the usage and the internal water accumulation.

In addition, as shown in the second and third figures, the controller 30 includes a heating plate 37 electrically connected to the measuring portion 20. The processing unit 31 controls the heating plate 37 to heat the measuring portion 20. This is used to evaporate the residual water in the measuring portion 20 through heating, thereby accelerating its removal through the exhaust pipe 341 of the electromagnetic valve 34.

10: Sensing tube 11: Dynamic pressure channel 111: Dynamic pressure orifice 12: Static pressure channel 121: Static pressure orifice 20: Measuring unit 21: Dynamic pressure chamber 22: Static pressure chamber 30: Controller 31: Processing unit 32: Differential pressure sensor 33: Display 34: Solenoid valve 341: Exhaust duct 342: Connecting pipe 35: Atmospheric pressure sensor 36: Temperature sensor 37: Heater

Figure 1 is a schematic diagram of the present invention in a three-dimensional assembly. Figure 2 is a schematic diagram of the sensor tube in a three-dimensional configuration with the controller removed. Figure 3 is a block diagram of the controller in a three-dimensional configuration. Figure 4 is a schematic diagram of the present invention in a plan view. Figure 5 is a schematic diagram of a partial cross-section of the sensor tube in a three-dimensional configuration with the controller removed. Figure 6 is an enlarged schematic diagram of a partial cross-section of the sensor tube in a three-dimensional configuration with the controller removed. Figure 7 is a schematic diagram of the present invention in a measurement state, with the sensor tube inserted into the gas pipeline during installation. Figure 8 is a schematic diagram of the measurement state shown in Figure 7, further directing the gas flow from the dynamic pressure chamber to the solenoid valve. Figure 9 is a schematic diagram of the present invention in a three-dimensional configuration, with the solenoid valve opening the exhaust pipe to expel moisture-laden gas.

10: Sensor tube

30: Controller

31: Arithmetic processing unit

33: Display component

Claims (5)

A gas flow measurement device, comprising: a sensing tube, one end of which is connected to a controller and has a dynamic pressure channel and a static pressure channel extending axially therein; one end of the dynamic pressure channel and the static pressure channel is connected to a measuring part and has a dynamic pressure orifice and a static pressure orifice located at the other end respectively; the measuring part is located in the controller and has adjacent dynamic pressure chambers and static pressure chambers therein; the dynamic pressure chamber is connected to the dynamic pressure channel and the static pressure chamber is connected to the static pressure channel; the controller includes an operation processing unit, a pressure differential sensor, a display element, and an electromagnetic valve electrically connected to each other; the pressure differential sensor is located between the dynamic pressure chamber and the static pressure chamber, and the pressure differential sensor is located between the dynamic pressure chamber and the static pressure chamber. The pressure differential sensor senses the pressure gas within the dynamic and static pressure chambers and generates a pressure differential signal. The electromagnetic valve has an exhaust pipe connected to the outside and a pipe connected to the dynamic pressure chamber. The computational processing unit receives and calculates the pressure differential signal. The computational processing unit calculates and obtains gas flow velocity and gas flow rate values and transmits them to the display element for display. The computational processing unit controls the electromagnetic valve to open the exhaust pipe to discharge moisture and impurities within the dynamic and static pressure chambers and the sensing tube. The controller also includes a heating plate electrically connected to the measuring section. The computational processing unit controls the heating plate to heat the measuring section. The gas flow measurement device of claim 1, wherein the controller includes an atmospheric pressure sensor electrically connected to the static pressure chamber, the atmospheric pressure sensor senses the pressure gas flowing from the dynamic pressure chamber to the static pressure chamber and generates an atmospheric pressure signal, and the processing unit receives and calculates the atmospheric pressure signal to calculate and obtain the gas pressure value. The gas flow measurement device as described in claim 1, wherein the controller includes a temperature sensor electrically connected to the measurement portion. The temperature sensor senses the temperature of the pressure gas passing through the dynamic pressure chamber and the static pressure chamber and generates a temperature signal. The processing unit receives and calculates the temperature signal to obtain the gas temperature value. The gas flow measurement device as described in claim 1, wherein the display element is a touch screen. The gas flow measurement device as described in claim 4, wherein the electromagnetic valve is operated by a display element to set the time interval for opening the exhaust duct.