CN210089763U - Novel orifice plate flowmeter and air sampler - Google Patents
Novel orifice plate flowmeter and air sampler Download PDFInfo
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- CN210089763U CN210089763U CN201921136776.0U CN201921136776U CN210089763U CN 210089763 U CN210089763 U CN 210089763U CN 201921136776 U CN201921136776 U CN 201921136776U CN 210089763 U CN210089763 U CN 210089763U
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- 239000007789 gas Substances 0.000 description 21
- 238000009530 blood pressure measurement Methods 0.000 description 9
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- 238000005859 coupling reaction Methods 0.000 description 3
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Abstract
The utility model discloses a novel orifice plate flowmeter and air sampler, novel orifice plate flowmeter is including being responsible for the body, temperature and pressure sensor and orifice plate, be provided with the sprue in being responsible for the body, be provided with the orifice on the orifice plate, the orifice plate embedding extremely be responsible for in the body just the orifice with the sprue is linked together, be responsible for the body the orifice plate both sides are opened respectively and are surveyed pressure port and meter back pressure port before the meter, survey pressure port and meter back pressure port respectively with be located the sprue of orifice plate both sides link up mutually, temperature and pressure sensor embedding sets up in being responsible for the body, just temperature and pressure sensor sets up the position and is located survey pressure port before the meter keeps away from on one side of orifice plate, air sampler includes above-mentioned novel orifice plate flowmeter and digital pressure differential pressure sensor. The utility model discloses a temperature and pressure sensor measures accurate before the meter temperature and the meter pressure, combines digital differential pressure sensor's value can calculate accurate flow.
Description
Technical Field
The utility model relates to a gas treatment field particularly, relates to a novel orifice plate flowmeter air sampler.
Background
In the current standards of the ministry of environmental protection, an atmosphere sampler is adopted for sampling in atmosphere at a constant flow, and an absorption bottle filled with absorption liquid is connected in series at the front part of an air passage by a solution absorption method to collect various harmful gases in ambient atmosphere and indoor air. The aerosol monitoring device can be used for conventional aerosol monitoring in environmental protection, sanitation, labor, safety supervision, military, scientific research, education and other departments. Atmospheric sampling is generally carried out at a fixed speed of 1L/min, and the flow rate needs to be accurately controlled to an error of plus or minus +/-5%.
In order to control the sampling flow, the common equipment samples a device called as a pore plate flowmeter to calculate the sampling flow, the pore plate flowmeter is provided with a straight-through gas path, a pore plate with a reduced diameter is embedded in the middle of the straight-through gas path, a pressure difference exists between the front and the back of the gas passing through the pore plate, a gas path is respectively extended to the front and the back of the pore plate to be connected with a pressure sensor on a mainboard, so that the pressure difference can be directly obtained from the mainboard, and the flow sampled by the current equipment can be calculated by combining the atmospheric pressure and the atmospheric temperature.
Because the existing equipment basically adopts the atmospheric pressure and atmospheric temperature of ambient air when calculating the flow, enters the sampling equipment through the gas circuit and reaches the orifice plate flowmeter through the absorption bottle drying cylinder filter element, the gas circuit and the device which are so long are not the pre-metering temperature and the pre-metering pressure of the gas which really flows through the orifice plate flow timing, and the pre-metering temperature and the pre-metering pressure are respectively in a certain way, so that the flow obtained by calculation still has certain error and is not the most real flow value. There is therefore a need for an air sampling device that accurately measures the correct pre-meter pressure and can correctly calculate the flow rate.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, the utility model provides a novel orifice plate flowmeter takes into account air sampler, novel orifice plate flowmeter is through keeping away from at the preceding pressure measurement mouth of meter orifice plate one side sets up temperature and pressure before the meter that temperature and pressure sensor measures accurate to the pressure that combines digital differential pressure sensor to measure the orifice plate both sides can calculate accurate gas acquisition flow.
In order to solve the technical problem, the utility model provides a novel orifice plate flowmeter, which comprises a main pipe body, a temperature and pressure sensor and an orifice plate;
a main flow channel is arranged in the main pipe body, a throttling hole is arranged on the pore plate, the pore plate is embedded into the main pipe body, and the throttling hole is communicated with the main flow channel;
the main pipe body is provided with a meter front pressure measuring port and a meter rear pressure measuring port on two sides of the pore plate respectively, and the meter front pressure measuring port and the meter rear pressure measuring port are communicated with main flow passages on two sides of the pore plate respectively;
the temperature and pressure sensor is embedded in the main pipe body, and the temperature and pressure sensor is arranged on one side, away from the pore plate, of the pressure measuring port in front of the meter.
As an optimized technical proposal of the utility model, the model of the temperature and pressure sensor is MS 5805-02 BA.
As a preferred technical scheme of the utility model, a serial communication port, it keeps away from to be responsible for the pressure measurement mouth before the somatic meter be provided with the recess on the outer wall of orifice plate one side, the recess intercommunication the sprue, the temperature and pressure sensor sets up in the recess, the temperature and pressure sensor is fixed based on the adhesive on the internal surface of recess.
In addition, the utility model also provides an air sampler, which comprises the novel orifice plate flowmeter, a main board and a digital differential pressure sensor;
digital differential pressure sensor sets up on the mainboard, digital differential pressure sensor has the measuring end, before the meter pressure port with behind the meter pressure port with digital differential pressure sensor connects, still be provided with the I2C interface on the mainboard, warm pressure sensor based on the sensor data line with I2C interface connection on the mainboard.
As an optimized technical solution of the present invention, the digital differential pressure sensor has two measuring ends.
As a preferred technical scheme of the utility model, be provided with fixed screw in main pipe body both sides, be responsible for the body based on fixed screw is fixed on the mainboard.
As a preferred technical scheme of the utility model, the air sampler still includes the air cock, the air cock with be responsible for the body coupling.
As a preferred technical scheme of the utility model, the air cock with be responsible for still being provided with clean filter core between the body, clean filter core has the inlet end and gives vent to anger the end, the inlet end with the air cock is connected, give vent to anger the end with be responsible for the body coupling.
As an optimized technical scheme of the utility model, the air sampler still includes the air pump, the end of breathing in of air pump with be responsible for the body coupling.
As an optimized technical scheme of the utility model, be responsible for the body with still be provided with the buffering air capacity between the air pump, the buffering air capacity respectively with be responsible for the body with the end of breathing in of air pump is connected.
The utility model provides a novel orifice plate flowmeter takes into account air sampler, and this novel orifice plate flowmeter takes into account beneficial effect that air sampler reached is: the novel orifice plate flowmeter is provided with a temperature and pressure sensor at one side of a pressure measuring port in front of the flowmeter, which is far away from the orifice plate, so as to measure accurate temperature and pressure in front of the flowmeter, and the pressure at two sides of the orifice plate is measured by combining the digital differential pressure sensor on the main board, so that accurate gas collecting flow can be calculated; the arrangement of the fixing screw hole can fix the main pipe body and prevent the main pipe body from shaking to influence the measurement accuracy; the air tap is arranged and can be connected with an external drying cylinder or an absorption bottle; the cleaning filter element is arranged, so that particles in the gas can be filtered and suck back is prevented; the air pump can provide power for the whole air circuit and adjust the speed according to the flow fed back by the main board; the buffering air volume can prevent the air pump from overloading.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 shows a schematic structural diagram of a main pipe body according to an embodiment of the present invention;
figure 2 shows a cross-sectional view of the main tube body of an embodiment of the invention;
fig. 3 shows a schematic structural diagram of a main board of an air sampler according to an embodiment of the present invention;
fig. 4 shows a schematic structural diagram of an air sampler according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
Fig. 1 shows a schematic structural diagram of a main pipe body according to an embodiment of the present invention; fig. 2 shows a cross-sectional view of a main tube according to an embodiment of the present invention.
The embodiment of the utility model provides a novel orifice plate flowmeter, novel orifice plate flowmeter includes main pipe body 1, warm-pressing sensor 2 and orifice plate 3;
a main flow channel 101 is arranged in the main pipe body 1, a throttling hole 301 is arranged on the pore plate 3, the pore plate 3 is embedded into the main pipe body 1, and the throttling hole 301 is communicated with the main flow channel 101;
a meter front pressure measuring port 102 and a meter rear pressure measuring port 103 are respectively formed in two sides of the pore plate 3 of the main pipe body 1, and the meter front pressure measuring port 102 and the meter rear pressure measuring port 103 are respectively communicated with the main flow passage 1 located on two sides of the pore plate 3;
the temperature and pressure sensor 2 is embedded in the main pipe body 1, and the temperature and pressure sensor 2 is arranged on one side of the pressure measuring port 102 far away from the pore plate 3.
It should be noted that, in the embodiment of the present invention, the flow calculation formula of the novel orifice plate flowmeter is as follows:
q in the above-mentioned formula is the flow value, and △ H is the pressure difference value, and a is for revising the intercept (demarcating in software interface), and b is for revising the slope (demarcating in software interface), and P is the pressure before the meter, and T is the temperature before the meter, and the above-mentioned P of traditional orifice plate flowmeter flow calculation and T adopt direct atmospheric pressure and atmospheric temperature to lead to the Q flow value that calculates to appear the deviation, the embodiment of the utility model discloses the orifice plate flowmeter is through keeping away from before the meter pressure measurement mouth 102 orifice 3 one side sets up temperature pressure sensor 2 and measures accurate T before the meter temperature and P meter pressure, combines before the meter pressure measurement mouth 102 and meter △ H pressure difference value that the pressure measurement mouth 103 measured behind the meter calculate actual flow, can avoid the calculation error that direct practical atmospheric pressure and atmospheric temperature caused, improve novel orifice plate flowmeter's accuracy.
Furthermore, the model of the temperature and pressure sensor 2 is MS 5805-02 BA, and MS 5805-02 BA is a high-resolution pressure and temperature sensor of MEAS Swiss division, and an I2C bus interface is used, so that the temperature and pressure sensor is an ideal choice for an altimeter and a barometer. The sensor comprises a high-linearity pressure sensing element and a super low-power 24-bit delta sigma ADC, and a factory calibration coefficient is built in. The MS 5805-02 BA provides a high precision 24 bit pressure and temperature digital output, and the user can configure the switching speed and power consumption according to the application needs. The high resolution temperature output can simultaneously perform the function of a thermometer.
Further, a groove 104 is arranged on the outer wall of the front pressure measuring port 102 of the main pipe body 1 on the side far away from the orifice plate 3, the groove 104 is communicated with the main flow passage 101, the temperature and pressure sensor 2 is arranged in the groove 104, and the temperature and pressure sensor 2 is fixed on the inner surface of the groove 104 based on an adhesive; fixing the temperature and pressure sensor 2 with an adhesive can prevent the temperature and pressure sensor 2 from falling off, and can seal the gap between the temperature and pressure sensor 2 and the recess 104 to prevent gas from leaking from the gap and further affecting the gas in the main flow passage 101 to cause deviation of the measured temperature and the pressure.
Fig. 3 shows a schematic structural diagram of a main board of an air sampler according to an embodiment of the present invention.
In addition, the embodiment of the utility model provides an air sampler, this air sampler includes above-mentioned novel orifice plate flowmeter, the air sampler still includes mainboard 4, digital differential pressure sensor 5;
the digital differential pressure sensor 5 is arranged on the main board 4, the digital differential pressure sensor 5 is provided with a measuring end 501, the meter front pressure measuring port 102 and the meter rear pressure measuring port 103 are connected with the digital differential pressure sensor 5, the digital differential pressure sensor 5 measures the pressures of the meter front pressure measuring port 102 and the meter rear pressure measuring port 103 and outputs the pressure difference value of the meter front pressure measuring port 102 and the meter rear pressure measuring port 103 for calculating a flow value; still be provided with I2C interface 6 on the mainboard 4, warm-pressing sensor 2 based on sensor data line 7 with I2C interface 6 on the mainboard 4 is connected, warm-pressing sensor 2 passes through I2C interface 6 with sensor data line 7 output the preceding temperature of survey and the preceding pressure of survey.
Preferably, the digital differential pressure sensor 5 has two pressure measurement ends 501, the two pressure measurement ends 401 respectively correspond to the pre-meter pressure measurement port 102 and the post-meter pressure measurement port 103 on the main pipe body 1, and the digital differential pressure sensor 5 measures pressures in front of and behind the orifice plate 5 and measures the air flow passing through the orifice plate 5 by combining the aperture of the orifice plate 5.
Further, fixing screw holes 8 are formed in two sides of the main pipe body 1, and the main pipe body 1 is fixed on the main board 4 based on the fixing screw holes 8; the main pipe body 1 is fixed, so that the main pipe body 1 is prevented from shaking due to air pressure change to influence the air pressure of the inner cavity, and the measurement accuracy is improved.
Fig. 4 shows a schematic structural diagram of an air sampler according to an embodiment of the present invention.
As shown in fig. 4, the air sampler further includes an air nozzle 9, and the air nozzle 9 is connected to the main flow channel 101 of the main flow pipe 1 based on an air pipe; the air tap 9 is used for being connected with external equipment such as a drying cylinder, an absorption bottle and the like, and an air processing device can improve the air quality, reduce the water content in the air, prevent the warm-pressure sensor 2 and the digital differential pressure sensor 5 from contacting the humid air to influence the measurement result, further prevent the moisture in the air from making the warm-pressure sensor 2 and the digital differential pressure sensor 5 age and short-circuit, and prolong the service life of the warm-pressure sensor 2 and the digital differential pressure sensor 5.
Preferably, a cleaning filter element 10 is further disposed between the air faucet 9 and the main pipe body 1, the cleaning filter element 10 has an air inlet end 1001 and an air outlet end 1002, the air inlet end 1001 is connected to the air faucet 9 based on an air pipe, and the air outlet end 1002 is connected to the main flow passage 101 of the main pipe body 1 based on an air pipe; the cleaning filter element 10 can filter the gas sucked by the gas nozzle 9, reduce moisture and particulate matters in the gas, improve the cleanliness of the gas, and prevent the moisture and the particulate matters in the gas from interfering with the measurement results of the temperature and pressure sensor 2 and the digital differential pressure sensor 5; additionally, cleaning cartridge 10 prevents the air sampler from drawing air backwards.
Further, the air sampler further comprises an air pump 11, and an air suction end of the air pump 11 is connected with the main flow passage 101 of the main pipe body 1 based on an air pipe; the air pump 11 is used for providing power for the whole air path, the control end of the air pump 11 is connected with the main board 3, and the main board 3 can adjust the air pumping rate of the air pump 11 according to the measured flow, so that the sampling rate of the air sampler can be adjusted.
Preferably, a buffer air volume 12 is further disposed between the main pipe body 1 and the air pump 11, and the buffer air volume 12 is connected to the main flow passage 101 of the main pipe body 1 and the air suction end of the air pump 11 based on an air pipe; the buffer air volume 12 can increase the air path space in the air sampler, so that the air pressure change in the air path space is slowed down, and the air pump 11 is prevented from being overloaded finally due to the fact that the air pressure of the air path is changed violently because the air pump 11 pumps air too fast.
The utility model provides a novel orifice plate flowmeter and an air sampler, wherein a temperature and pressure sensor is arranged on one side of the orifice plate far away from a pressure measuring port in front of the flowmeter to measure accurate temperature and pressure in front of the flowmeter, and the pressure on two sides of the orifice plate is measured by combining the digital differential pressure sensor on the mainboard to calculate accurate gas collecting flow; the arrangement of the fixing screw hole can fix the main pipe body and prevent the main pipe body from shaking to influence the measurement accuracy; the air tap is arranged and can be connected with an external drying cylinder or an absorption bottle; the cleaning filter element is arranged, so that particles in the gas can be filtered and suck back is prevented; the air pump can provide power for the whole air circuit and adjust the speed according to the flow fed back by the main board; the buffering air volume can prevent the air pump from overloading.
In addition, the above detailed description is made on the novel orifice plate flowmeter and the air sampler provided by the embodiment of the present invention, and the detailed embodiment is used herein to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
Claims (10)
1. The novel orifice plate flowmeter is characterized by comprising a main pipe body, a temperature and pressure sensor and an orifice plate;
a main flow channel is arranged in the main pipe body, a throttling hole is arranged on the pore plate, the pore plate is embedded into the main pipe body, and the throttling hole is communicated with the main flow channel;
the main pipe body is provided with a meter front pressure measuring port and a meter rear pressure measuring port on two sides of the pore plate respectively, and the meter front pressure measuring port and the meter rear pressure measuring port are communicated with main flow passages on two sides of the pore plate respectively;
the temperature and pressure sensor is embedded in the main pipe body, and the temperature and pressure sensor is arranged on one side, away from the pore plate, of the pressure measuring port in front of the meter.
2. The novel orifice plate flowmeter as set forth in claim 1, wherein said warm pressure sensor is of the type MS 5805-02 BA.
3. The novel orifice plate flowmeter as claimed in claim 1, wherein a groove is provided on an outer wall of a front pressure measuring port of the main fluid meter on a side away from the orifice plate, the groove communicates with the main flow passage, the temperature and pressure sensor is disposed in the groove, and the temperature and pressure sensor is fixed on an inner surface of the groove based on an adhesive.
4. An air sampler comprising the novel orifice plate flow meter of any of claims 1 to 3, the air sampler further comprising a main board, a digital differential pressure sensor;
digital differential pressure sensor sets up on the mainboard, digital differential pressure sensor has the measuring end, before the meter pressure port with behind the meter pressure port with digital differential pressure sensor connects, still be provided with the I2C interface on the mainboard, warm pressure sensor based on the sensor data line with I2C interface connection on the mainboard.
5. The air sampler of claim 4, wherein the digital differential pressure sensor has two measurement terminals.
6. The air sampler of claim 4, wherein the main pipe body is provided with fixing screw holes at both sides thereof, and the main pipe body is fixed on the main board based on the fixing screw holes.
7. The air sampler of claim 4, further comprising a gas nozzle coupled to the primary tube.
8. The air sampler of claim 7, wherein a cleaning filter element is disposed between the air tap and the main tube, the cleaning filter element having an air inlet end and an air outlet end, the air inlet end being connected to the air tap, the air outlet end being connected to the main tube.
9. The air sampler of claim 4, further comprising an air pump having an air suction end fluidly connected to the primary tube.
10. The air sampler of claim 9, wherein a buffer air volume is further disposed between the main tube and the air pump, and the buffer air volume is connected to the air suction ends of the main tube and the air pump, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921136776.0U CN210089763U (en) | 2019-07-18 | 2019-07-18 | Novel orifice plate flowmeter and air sampler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921136776.0U CN210089763U (en) | 2019-07-18 | 2019-07-18 | Novel orifice plate flowmeter and air sampler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210089763U true CN210089763U (en) | 2020-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921136776.0U Expired - Fee Related CN210089763U (en) | 2019-07-18 | 2019-07-18 | Novel orifice plate flowmeter and air sampler |
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| Country | Link |
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| CN (1) | CN210089763U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924245A (en) * | 2021-01-28 | 2021-06-08 | 中国科学院地质与地球物理研究所 | Near-on space aerosol's collection device |
-
2019
- 2019-07-18 CN CN201921136776.0U patent/CN210089763U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924245A (en) * | 2021-01-28 | 2021-06-08 | 中国科学院地质与地球物理研究所 | Near-on space aerosol's collection device |
| CN112924245B (en) * | 2021-01-28 | 2022-02-01 | 中国科学院地质与地球物理研究所 | Near-on space aerosol's collection device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200218 |