CN221404378U - Air quantity measuring device - Google Patents
Air quantity measuring device Download PDFInfo
- Publication number
- CN221404378U CN221404378U CN202322960222.5U CN202322960222U CN221404378U CN 221404378 U CN221404378 U CN 221404378U CN 202322960222 U CN202322960222 U CN 202322960222U CN 221404378 U CN221404378 U CN 221404378U
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- pressure
- air
- air pipe
- low
- sampling ports
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- 238000005070 sampling Methods 0.000 claims abstract description 30
- 239000011148 porous material Substances 0.000 claims abstract description 9
- 238000009530 blood pressure measurement Methods 0.000 claims description 4
- 238000009529 body temperature measurement Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Measuring Fluid Pressure (AREA)
Abstract
The utility model relates to the field of measuring devices, in particular to an air quantity measuring device. The utility model relates to an air volume measuring device which consists of a measuring air pipe and an intelligent air volume measuring module, wherein the measuring air pipe comprises a low-pressure air pipe, a pore plate and a high-pressure air pipe, and the pore plate is arranged between the low-pressure air pipe and the high-pressure air pipe; the low-pressure air pipe is provided with a plurality of low-air pressure sampling ports, the low-air pressure sampling ports are arranged along the section of the vertical low-pressure air pipe shaft line, and the low-air pressure sampling ports are connected with a low-air pressure interface through a hose; the high-pressure air pipe is provided with a plurality of high-air pressure sampling ports, the high-air pressure sampling ports are arranged along the section perpendicular to the axis of the high-pressure air pipe, and the high-air pressure sampling ports are connected with the high-air pressure interface through hoses.
Description
Technical Field
The utility model relates to the field of measuring devices, in particular to an air quantity measuring device.
Background
The hydrodynamic bernoulli equation specifies: as the fluid flows within the tube, the tube will create a resistance to the flow, the magnitude of which is related to the density and flow rate of the fluid. The accuracy of the conventional air volume measuring device realized by the scheme is relatively common.
Disclosure of Invention
The utility model aims to provide an air quantity measuring device, which comprises the following specific schemes:
The air volume measuring device consists of a measuring air pipe and an intelligent air volume measuring module, wherein the measuring air pipe comprises a low-pressure air pipe, a pore plate and a high-pressure air pipe, and the pore plate is arranged between the low-pressure air pipe and the high-pressure air pipe; the low-pressure air pipe is provided with a plurality of low-air pressure sampling ports, the low-air pressure sampling ports are arranged along the section of the vertical low-pressure air pipe shaft line, and the low-air pressure sampling ports are connected with a low-air pressure interface through a hose; the high-pressure air pipe is provided with a plurality of high-air pressure sampling ports, the high-air pressure sampling ports are arranged along the section perpendicular to the axis of the high-pressure air pipe, and the high-air pressure sampling ports are connected with the high-air pressure interface through hoses.
The low-pressure air pipe is connected with the orifice plate through a bolt, and the orifice plate is connected with the high-pressure air pipe through a bolt.
And flanges are arranged on the low-pressure air pipe and the high-pressure air pipe.
The intelligent air volume measurement module comprises a power circuit, an MCU, a differential pressure measurement chip, an NTC temperature measurement chip, a digital display, an output interface and an interface, wherein the differential pressure measurement chip comprises a differential pressure sensor, and the differential pressure sensor is arranged on a high air pressure interface and a low air pressure interface.
The NTC temperature measurement chip comprises temperature sensors which are arranged in the low-pressure air pipe and the high-pressure air pipe.
According to the utility model, the low-pressure air pipe and the high-pressure air pipe are respectively provided with the plurality of sampling ports, the sampling ports are arranged along the section vertical to the axis of the air pipe to collect and measure the pressure difference of the air pipe at two sides of the pore plate under different flow rates, and the plurality of sampling ports are arranged to improve the sampling precision of the wind pressure value.
Drawings
FIG. 1 is a schematic diagram of a measuring duct in an air volume measuring device according to the present utility model;
FIG. 2 is a schematic diagram of an intelligent air volume measuring module in an air volume measuring device according to the present utility model;
Wherein the reference numerals: 1. a low-pressure air duct; 2. a high-pressure air duct; 3. an orifice plate; 4. a low wind pressure interface; 5. a high wind pressure interface; 6. a low-pressure air pipe sampling port; 7. and a high-pressure air pipe sampling port.
Detailed Description
Further description is provided below in connection with fig. 1-2:
The air volume measuring device consists of a measuring air pipe and an intelligent air volume measuring module, wherein the measuring air pipe comprises a low-pressure air pipe 1, a pore plate 3 and a high-pressure air pipe 2, and the pore plate 3 is arranged between the low-pressure air pipe 1 and the high-pressure air pipe 2; the low-pressure air pipe 1 is provided with a plurality of low-wind pressure sampling ports 6, the low-wind pressure sampling ports 6 are arranged along the section vertical to the axis of the low-pressure air pipe 1, and the low-wind pressure sampling ports 6 are connected with the low-wind pressure interface 4 through a hose; a plurality of high wind pressure sampling ports 7 are arranged on the high pressure air pipe 3, the high wind pressure sampling ports 7 are arranged along the section vertical to the axis of the high pressure air pipe 2, and the high wind pressure sampling ports 7 are connected with the high wind pressure interface 5 through hoses.
The low-pressure air pipe 1 is connected with the orifice plate 3 through bolts, and the orifice plate 3 is connected with the high-pressure air pipe 2 through bolts.
Flanges are arranged on the low-pressure air pipe 1 and the high-pressure air pipe 2.
The intelligent air volume measuring module comprises a power circuit, an MCU, a differential pressure measuring chip, an NTC temperature measuring chip, a digital display, an output interface and an interface, wherein the differential pressure measuring chip comprises a differential pressure sensor, and the differential pressure sensor is arranged on the high air pressure interface 5 and the low air pressure interface 4.
The NTC temperature measuring chip comprises temperature sensors which are arranged in the low-pressure air pipe 1 and the high-pressure air pipe 2.
The differential pressure sensor is used for collecting and measuring the differential pressure between the high wind pressure interface 5 and the low wind pressure interface 4 of the wind pipe, and the differential pressure signal is amplified by the operational amplifier circuit and then is sent to the ADC analog-digital collection port of the MCU. The temperature sensor is arranged in the measuring air pipe and used for collecting and measuring the air temperature in the air pipe, and the interface circuit collects temperature signals and sends the temperature signals to the ADC analog-digital collection port of the MCU. The intelligent air volume measuring module obtains air volume according to interpolation operation of a pressure difference-air volume relation data table, carries out standard working condition air volume operation correction according to measured air temperature, and inputs the air volume-pressure difference relation data table into an intelligent air volume measuring module database through an RS485 interface after the air volume-pressure difference relation data table is measured in advance. The intelligent air volume measuring module is provided with an RS485 interface, supports MODBUS protocol, can be read by external intelligent equipment, converts an air volume value into an analog signal, and is used by an external controller and an instrument through a 4-20mA output interface.
The use of the air quantity measuring instrument firstly installs the measuring air pipe in a ventilation system pipeline of a user, requires that the length of a straight pipe at the upstream and downstream of the measuring air pipe is not less than 2 times of the equivalent diameter of the measuring air pipe, respectively connects a low air pressure interface 4 and a high air pressure interface 5 on the measuring air pipe to corresponding interfaces of an intelligent air quantity measuring module by using hoses, installs a temperature sensor in the measuring air pipe, connects the intelligent air quantity measuring module with a 220V power supply, and connects an RS485 interface or a 4-20mA output interface to external equipment if necessary. After the intelligent air quantity measuring module is electrified, the digital display displays the real-time air quantity value, and the external equipment receives the related data.
The above description is not intended to limit the present utility model, but is not limited to the above examples, and variations, modifications, additions or substitutions within the spirit and scope of the present utility model will become apparent to those of ordinary skill in the art.
Claims (5)
1. An air volume measuring device, characterized in that: the intelligent air volume measuring device comprises a measuring air pipe and an intelligent air volume measuring module, wherein the measuring air pipe comprises a low-pressure air pipe, a pore plate and a high-pressure air pipe, and the pore plate is arranged between the low-pressure air pipe and the high-pressure air pipe; the low-pressure air pipe is provided with a plurality of low-air pressure sampling ports, the low-air pressure sampling ports are arranged along the section of the vertical low-pressure air pipe shaft line, and the low-air pressure sampling ports are connected with a low-air pressure interface through a hose; the high-pressure air pipe is provided with a plurality of high-air pressure sampling ports, the high-air pressure sampling ports are arranged along the section perpendicular to the axis of the high-pressure air pipe, and the high-air pressure sampling ports are connected with the high-air pressure interface through hoses.
2. An air volume measuring device according to claim 1, wherein: the low-pressure air pipe is connected with the orifice plate through a bolt, and the orifice plate is connected with the high-pressure air pipe through a bolt.
3. An air volume measuring device according to claim 1, wherein: and flanges are arranged on the low-pressure air pipe and the high-pressure air pipe.
4. An air volume measuring device according to claim 1, wherein: the intelligent air volume measurement module comprises a power circuit, an MCU, a differential pressure measurement chip, an NTC temperature measurement chip, a digital display, an output interface and an interface, wherein the differential pressure measurement chip comprises a differential pressure sensor, and the differential pressure sensor is arranged on a high air pressure interface and a low air pressure interface.
5. The air volume measuring device according to claim 4, wherein: the NTC temperature measurement chip comprises temperature sensors which are arranged in the low-pressure air pipe and the high-pressure air pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322960222.5U CN221404378U (en) | 2023-11-02 | 2023-11-02 | Air quantity measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322960222.5U CN221404378U (en) | 2023-11-02 | 2023-11-02 | Air quantity measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221404378U true CN221404378U (en) | 2024-07-23 |
Family
ID=91926084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322960222.5U Active CN221404378U (en) | 2023-11-02 | 2023-11-02 | Air quantity measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221404378U (en) |
-
2023
- 2023-11-02 CN CN202322960222.5U patent/CN221404378U/en active Active
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