CN212030641U - Peripheral sampling differential pressure sensor for gas flow collection - Google Patents
Peripheral sampling differential pressure sensor for gas flow collection Download PDFInfo
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- CN212030641U CN212030641U CN202020306878.9U CN202020306878U CN212030641U CN 212030641 U CN212030641 U CN 212030641U CN 202020306878 U CN202020306878 U CN 202020306878U CN 212030641 U CN212030641 U CN 212030641U
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Abstract
The utility model discloses a peripheral sampling differential pressure sensor for gas flow gathers, flow tube, connecting valve triplex around including. The connecting valve is connected with the front flow pipe and the rear flow pipe in the middle, a plurality of air inlets through which air flows can pass are arranged on the inner ring of the connecting valve, two annular flow cavities which are mutually isolated are arranged in the connecting valve, an integrated buckle is arranged on the connecting valve, two pressure taking ports are arranged on the two annular flow cavities, and the two annular flow cavities are respectively communicated with the inlet end and the outlet end through the air inlets arranged on the inner arm ring of the connecting valve. The utility model has the advantages that the flow value in the breathing process is measured by the way of gas pressure difference, and the two annular flow cavities are isolated from each other, so as to avoid cross infection; porous pressure sampling is carried out, so that the components are reliable, and the damage to oxygen components is small; pressure is taken from the periphery of the porous pipe, and the pressure is taken uniformly; the air flow in the tube is smooth and has no obstruction, the air flow obstruction is small, and the air flow flowing is not damaged; the sampling and the pressure taking channel are separated, and the influence on the accuracy of the flow rate measurement is small.
Description
Technical Field
The utility model relates to a gas flow measurement technical field, concretely relates to peripheral sample differential pressure sensor for gas flow gathers.
Background
The flow sensor is used for a cardiopulmonary exercise test system (CPET), the system obtains a numerical value through collecting respiratory gas flow difference for diagnosis of doctors, the differential pressure sensor is a relatively common flow sensor at home and abroad, a fluid isolation flow cavity channel is arranged on the sensor, gas flow generated by inspiration and expiration is isolated, and the gas flow difference is obtained through a pressure taking port.
The traditional flow sensor has poor precision and is inconvenient to clean and disinfect, and the current pressure difference sensor on the market has the following defects: a pressure taking column is arranged in the flow pipe, the airflow obstruction is large, the gas component damage is large, and the gas flow collection is uneven; the measured data has small precision and large error.
Aiming at the technical problems, an effective method is not solved at present.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a peripheral sampling differential pressure sensor for gas flow collection, which measures the gas flow value in the breathing process in a gas pressure difference mode, and the consumables are isolated from the connecting piece, and the two annular flow channels are isolated from each other, thereby avoiding cross infection; porous pressure sampling is carried out, so that the components are reliable, and the damage to oxygen components is small; pressure is taken from the periphery of the porous pipe, and the pressure is taken uniformly; the inside of the tube is smooth without obstacles, has small unobstructed airflow and meets the ATS resistance requirement, and the front flow tube and the rear flow tube are symmetrical without damaging airflow flow; the sampling is separated from the pressure taking channel, the influence on the accuracy of flow rate measurement is small, the flow rate measurement is converged at the joint, and the connector is small in size and light in weight.
In order to achieve the technical purpose, the technical scheme of the utility model is realized as follows: a peripheral sampling differential pressure sensor for collecting gas flow comprises a front flow tube, a rear flow tube and a connecting valve. The connecting valve is connected with the front flow tube and the rear flow tube in the middle, a plurality of air inlets through which air can pass are arranged on the inner ring of the connecting valve, two annular flow cavities which are isolated from each other are arranged in the connecting valve, an integrated buckle is arranged on the connecting valve, two pressure taking ports are arranged on the two annular flow cavities, one of the annular flow cavities is communicated with the inlet end through the air inlet arranged on the inner arm ring of the connecting valve, and the other annular flow cavity is communicated with the outlet end through the air inlet arranged on the inner arm ring of the connecting valve.
Preferably, the inner walls of the front flow tube, the lower fluid tube and the connecting valve are smooth and free of obstacles.
Preferably, the front flow tube is provided with a plurality of circular filter screens at a position close to the inlet end.
Preferably, the front and back flow tubes are angled inwardly.
Preferably, the connecting valve is provided with a sampling port at the periphery.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model adopts a peripheral sampling mode, the consumables are isolated from the connecting piece, and the two annular flow channels are isolated from each other, so that cross infection is avoided; porous pressure sampling is carried out, so that the components are reliable, and the damage to oxygen components is small; pressure is taken from the periphery of the porous pipe, and the pressure is taken uniformly; the inside of the tube is smooth without obstacles, has small unobstructed airflow and meets the ATS resistance requirement, and the front flow tube and the rear flow tube are symmetrical without damaging airflow flow; the sampling is separated from the pressure taking channel, the influence on the accuracy of flow rate measurement is small, the flow rate measurement is converged at the joint, and the connector is small in size and light in weight.
Drawings
Fig. 1 is a schematic diagram of a peripheral sampling differential pressure sensor for gas flow collection according to an embodiment of the present invention;
fig. 2 is a cross-sectional view according to an embodiment of the present invention;
fig. 3 is a cross-sectional view of a peripheral sampling differential pressure sensor for gas flow collection according to an embodiment of the present invention;
in the figure: 1. a front flow tube; 2. a rear flow tube; 3. a connecting valve; 4. an inlet end; 5. an outlet end; 6. a filter screen; 7. A pressure taking port; 8. a sampling port; 9. an air inlet; 10. an annular flow channel; 11. and (5) buckling.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following description will be made with reference to the accompanying drawings in the embodiments of the present invention to further explain the technical solutions in the embodiments of the present invention.
As shown in fig. 1-3, the utility model relates to a peripheral sampling differential pressure sensor for gas flow gathers, which comprises a front flow tube 1, a rear flow tube 2 and a connecting valve 3. The connecting valve 3 is connected with the front flow tube 1 and the rear flow tube 2 in the middle, a plurality of air inlets 9 through which air flow can pass are arranged on the inner ring of the connecting valve 3, two annular flow cavities 10 which are isolated from each other are arranged in the connecting valve 3, an integrated buckle 11 is arranged on the connecting valve 3, two pressure taking ports 7 are arranged on the two annular flow cavities 10, one of the annular flow cavities is communicated with the inlet end 4 through the air inlet 9 arranged on the inner arm ring of the connecting valve 3, and the other annular flow cavity 10 is communicated with the outlet end 5 through the air inlet 9 arranged on the inner arm ring of the connecting valve 3.
In one embodiment of the present invention, the inner walls of the front flow tube 1, the lower flow tube 2 and the connecting valve 3 are smooth and free of obstacles.
In a specific embodiment of the present invention, the front flow tube 1 is provided with a circular filter screen 6 at a position close to the inlet end 4.
In an embodiment of the present invention, the middle portions of the front flow tube 1 and the rear flow tube 2 are inwardly contracted by a certain angle.
In a specific embodiment of the present invention, the connecting valve 3 is provided with a sampling port 8 at its periphery.
In order to facilitate understanding of the technical solutions of the present invention, the technical solutions are described in detail through specific use modes.
The utility model adopts the differential pressure mode to measure the flow by measuring the bidirectional gas flow differential pressure in the respiratory process from the differential pressure in the two annular flow channels 10 in the connecting valve, compared with the traditional differential pressure flow sensor, the utility model adopts the peripheral sampling mode, the consumable material is isolated from the connecting piece, the two annular flow channels are isolated from each other, and the cross infection is avoided; porous pressure sampling is carried out, so that the components are reliable, and the damage to oxygen components is small; pressure is taken from the periphery of the porous pipe, and the pressure is taken uniformly; the inside of the tube is smooth without obstacles, has small unobstructed airflow and meets the ATS resistance requirement, and the front flow tube and the rear flow tube are symmetrical without damaging airflow flow; the sampling is separated from the pressure taking channel, the influence on the accuracy of flow rate measurement is small, the flow rate measurement is converged at the joint, and the connector is small in size and light in weight.
The peripheral sampling differential pressure sensor comprises a structure that a front flow pipe 1 and a rear flow pipe 2 contract inwards and a connecting valve 3, when breathing, gas flow uniformly enters an annular flow cavity channel 10 through an annular gas inlet 9 on the connecting valve 3 without any barrier shielding, the destructiveness of gas components is small, the gas flow measurement precision is high, and the bidirectional gas flow of breathing gas of a subject can be calculated by measuring the pressure difference measured by a pressure taking port communicated with the two isolated annular flow cavity channels.
The round filter screen 6 is arranged at the inlet end 4, so that foreign matters and saliva in the breathing process can be effectively intercepted, and the flow can normally pass without interference.
During specific operation, the upper fluid pipe 1 and the lower fluid pipe 2 are connected through the connecting valve, the inlet end 4 of the front flow pipe 1 is detachably connected with a mask or a mouthpiece, the flow pipe is connected with an external detachable plug, a subject takes the mask or the mouthpiece to breathe, gas enters the annular cavity from the inlet end 4 and flows to the outlet end 5 during exhalation, the gas enters the annular cavity from the outlet end 5 and flows into the inlet end 4 during inhalation, the gas enters the annular flow cavity 10 through the gas inlet 9 during flowing through the connecting valve, gas pressure difference is obtained from the pressure taking port 7, real-time flow rate and flow of breathing of the subject are analyzed, and oxygen and carbon dioxide components of breathing gas are collected from the sampling port 8.
In summary, the technical scheme of the utility model has simple and smooth structure, convenient and fast use, accurate test by adopting a peripheral sampling mode, and meeting the ATS requirement; the consumptive material is kept apart with the connecting piece, but connecting piece and consumptive material repetitious usage, and use cost formula is cheap than the integral type, can be used to cardiopulmonary testing system to carry out flow gas acquisition computational analysis.
The foregoing embodiments and description only describe preferred embodiments of the present invention, and are not intended to limit the present invention, and the present invention can be further modified with various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. A peripheral sampling differential pressure sensor for collecting gas flow comprises a front flow tube (1), a rear flow tube (2) and a connecting valve (3), and is characterized in that the connecting valve (3) is connected with the front flow tube (1) and the rear flow tube (2) in the middle, a plurality of gas inlets (9) for gas flow to pass through are arranged on the inner ring of the connecting valve (3), two annular flow channels (10) which are mutually isolated are arranged in the connecting valve (3), an integrated buckle (11) is arranged on the connecting valve (3), two corresponding pressure taking ports (7) are arranged on the two annular flow channels (10), one of the two collecting channels is communicated with an inlet end (4) through the gas inlet (9) arranged on the collecting channel, the other collecting channel is communicated with an outlet end (5) through the gas inlet (9) arranged on the collecting channel, the periphery of the connecting valve (3) is provided with a sampling port (8).
2. Peripheral sampling differential pressure sensor for gas flow collection according to claim 1, characterized in that the front flow tube (1), the rear flow tube (2) and the connecting valve (3) have smooth inner walls without obstacles.
3. Perimeter sampling differential pressure sensor for gas flow collection according to claim 1, characterized in that the front flow tube (1) is provided with several circular filter screens (6) at a position close to the inlet end (4).
4. Perimeter sampling differential pressure sensor for gas flow collection according to claim 1, characterized in that the front flow tube (1) and the rear flow tube (2) are inwardly angled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020306878.9U CN212030641U (en) | 2020-03-12 | 2020-03-12 | Peripheral sampling differential pressure sensor for gas flow collection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020306878.9U CN212030641U (en) | 2020-03-12 | 2020-03-12 | Peripheral sampling differential pressure sensor for gas flow collection |
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| Publication Number | Publication Date |
|---|---|
| CN212030641U true CN212030641U (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020306878.9U Active CN212030641U (en) | 2020-03-12 | 2020-03-12 | Peripheral sampling differential pressure sensor for gas flow collection |
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| Country | Link |
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| CN (1) | CN212030641U (en) |
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2020
- 2020-03-12 CN CN202020306878.9U patent/CN212030641U/en active Active
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