CN106596200B - Airborne sampling head capable of preventing water from flowing backwards and application thereof - Google Patents
Airborne sampling head capable of preventing water from flowing backwards and application thereof Download PDFInfo
- Publication number
- CN106596200B CN106596200B CN201611243084.7A CN201611243084A CN106596200B CN 106596200 B CN106596200 B CN 106596200B CN 201611243084 A CN201611243084 A CN 201611243084A CN 106596200 B CN106596200 B CN 106596200B
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- pipe
- sampling head
- radial
- nozzle
- head capable
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
Abstract
The invention provides an airborne sampling head capable of preventing water from flowing backwards and application thereof, wherein the airborne sampling head capable of preventing water from flowing backwards comprises a T-shaped pipe 1, wherein the end parts of transverse pipe orifices and radial pipe orifices on two sides in the T-shaped pipe 1 are both of an open structure, the inner diameter of the pipe orifice on one side in the transverse pipe orifices is smaller than that of the pipe orifice on the other side, and a protrusion 3 is arranged at the position, close to the radial pipe orifice, in the pipe orifice on the other side; the application of the airborne sampling head capable of preventing the water from flowing backwards in the collection of air outside an aircraft cabin. The airborne sampling head capable of preventing the water vapor from condensing and flowing backwards can effectively prevent the water vapor condensed by the water vapor from gathering at the air inlet, thereby improving the efficiency and the quality of the collected sample.
Description
Technical Field
The invention relates to the field of sampling components, in particular to an airborne sampling head capable of preventing water from flowing backwards and application thereof.
Background
Since the invention of the airplane, the airplane increasingly becomes an indispensable vehicle for modern civilization, the airplane profoundly changes and influences the life of people, and the history of conquering blue sky by people is opened. However, since the aircraft flies in the air, there is a very high demand for safety. Since the components of the aircraft and the flight conditions are influenced by the external environment, it is very important to monitor the conditions of the external environment at any time. At present, most of air inlets arranged outside the cabin are T-shaped pipes, as shown in fig. 1, however, in the sampling process of the air inlets, due to the influence of temperature and pressure, water vapor in the air can be condensed into water vapor and is gathered at the junction of the T-shaped pipes, and therefore sampling of the air inlets is influenced. Particularly, in the case of high-speed flight of an aircraft, when air outside the cabin enters the air inlet, the phenomenon of water vapor condensation is more likely to occur. When the sampling instrument sucks in the water vapor, the test result is greatly influenced.
Therefore, there is a need for a device that avoids condensation of water vapor on the tube wall, reduces measurement errors, and is inexpensive.
Disclosure of Invention
The invention aims to overcome the defect that in the prior art, water vapor in air can be condensed into water vapor to be gathered at an air inlet due to the influence of temperature and pressure, so that the sampling of the air inlet is influenced, and provides an airborne sampling head capable of preventing water from flowing backwards.
In order to achieve the above object, in a first aspect, the present invention provides an airborne sampling head capable of preventing water from flowing backwards, the airborne sampling head capable of preventing water vapor from condensing and flowing backwards includes a T-shaped pipe, wherein both ends of a lateral pipe orifice and a radial pipe orifice on two sides in the T-shaped pipe are in an open structure, an inner diameter of a pipe orifice on one side in the lateral pipe orifice is smaller than an inner diameter of a pipe orifice on the other side, and a protrusion is disposed at a position close to the radial pipe orifice in the pipe orifice on the other side.
Preferably, the inner diameter of the one-side nozzle near the inner end of the tube is smaller than the inner diameter near the outer end of the tube.
Preferably, the inner diameter of the other side nozzle near the inner end of the tube is smaller than the inner diameter near the outer end of the tube.
Preferably, the airborne sampling head capable of preventing water vapor from condensing and flowing backwards further comprises an air inlet nozzle, wherein the air inlet nozzle is fixed at the inner end of the pipe orifice on one side.
Preferably, the position of one end of the air inlet nozzle far away from the inner end of the pipe exceeds the vertical position of the radial nozzle of the T-shaped pipe.
Preferably, the internal diameter of the nozzle is greater proximate the inner end of the tube than distal therefrom.
On the other hand, the invention also provides the application of the airborne sampling head capable of preventing the water from flowing backwards in the collection of air outside the aircraft cabin.
The airborne sampling head capable of preventing the water vapor from condensing and flowing backwards can effectively prevent the water vapor condensed by the water vapor from gathering at the air inlet, thereby improving the efficiency and the quality of the collected sample.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a prior art airborne sampling head;
FIG. 2 is a view showing an onboard sampling head capable of preventing condensation and backflow of water vapor according to the present invention;
fig. 3 is an onboard sampling head capable of preventing condensation and backflow of water vapor according to a preferred embodiment of the present invention.
Description of the reference numerals
1T-shaped pipe 2 air inlet nozzle
3 protrusion
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein. In this context, when comparing the inner diameters of the orifices or of the ends of a single orifice, it is to be understood that the two are coaxial or substantially coaxial, and further, when the inner diameter of one of the compared orifices is non-uniform, the smallest inner diameter of that orifice is taken as the inner diameter of that orifice.
The invention provides an airborne sampling head capable of preventing water vapor from being condensed and flowing backwards, which comprises a T-shaped pipe 1, wherein the end parts of a transverse pipe orifice and a radial pipe orifice at two sides in the T-shaped pipe 1 are both of an opening structure, the inner diameter of the pipe orifice at one side in the transverse pipe orifice is smaller than that of the pipe orifice at the other side, and a protrusion 3 is arranged at the position, close to the radial pipe orifice, in the pipe orifice at the other side.
As shown in fig. 2, the ends of the lateral pipe orifices and the radial pipe orifices on two sides in the T-shaped pipe 1 are both open structures, so that air can enter or be discharged from three ends of the T-shaped pipe, the lateral pipe orifices on two sides of the T-shaped pipe 1 refer to two opposite pipe orifices at the upper end of the T-shaped pipe, and the radial pipe orifices of the T-shaped pipe 1 refer to another pipe orifice perpendicular to the lateral pipe orifices on two sides in the T-shaped pipe 1. When an airplane flies, air enters the airborne sampling head capable of preventing water vapor from being condensed and flowing backwards from the pipe orifice on one side of the T-shaped pipe 1, when the air reaches the upper part of the radial pipe orifice of the T-shaped pipe 1, an air suction device (such as a pump) is connected to the end part of the radial pipe orifice of the T-shaped pipe 1, due to the suction effect, part of the air reaching the upper part of the radial pipe orifice is led out from the radial pipe orifice of the T-shaped pipe 1, so that subsequent detection is carried out, the rest of the air rushes through the radial pipe orifice and flows out from the pipe orifice on the other side, and a large amount of water vapor. The inner diameter of the pipe orifice on one side in the transverse pipe orifices is smaller than that of the pipe orifice on the other side, namely the upper surface of the lower end of the pipe orifice on one side is higher than that of the lower end of the pipe orifice on the other side, so that the air flow can further rush to the position, far away from the radial pipe orifice, in the pipe orifice on the other side, and the condensed water vapor is not easy to fall into the radial pipe orifice. Meanwhile, a protrusion 3 is arranged in the other side pipe orifice and close to the radial pipe orifice, and the protrusion 3 can prevent water vapor in the other side pipe orifice from flowing into the radial pipe orifice.
According to the present invention, the inner diameter of each end of each pipe orifice is not particularly limited, and the above object of the present invention can be achieved.
Preferably, the inner diameter of the one-side nozzle near the inner end of the tube is smaller than the inner diameter near the outer end of the tube. This increases the flow rate of the gas stream at the end of the tube adjacent the one-sided nozzle, thereby allowing condensation of water vapor to accumulate at the tube end.
Preferably, the inner diameter of the other side nozzle near the inner end of the tube is smaller than the inner diameter near the outer end of the tube. Therefore, the water vapor condensed at the pipe orifice at the other side close to the inner end of the pipe can flow out of the other side pipe orifice along the slope along the direction of the outer end of the pipe orifice.
In a preferred embodiment of the invention, the onboard sampling head capable of preventing water vapor from condensing and flowing backwards further comprises an air inlet nozzle 2, wherein the air inlet nozzle 2 is fixed at the inner end of the pipe orifice on one side. This allows moisture to more easily pass over the radial nozzles without accumulating at the interface of the nozzles and even entering the radial nozzles.
Preferably, the position of the end of the air inlet nozzle 2 far away from the inner end of the pipe exceeds the vertical position of the radial nozzle of the T-shaped pipe 1.
More preferably, the inner diameter of the nozzle 2 near the inner end of the tube is larger than the inner diameter far from the inner end of the tube. That is, the inner diameter of the outlet of the air inlet nozzle 2 is smaller, so that the flow rate of the air flow at the outlet of the air inlet nozzle 2 is improved, and meanwhile, part of water vapor can directly flow back to the outer end due to the gradient and cannot fall down from the outlet of the air inlet nozzle 2, so that the sampling efficiency and quality are further improved.
According to a preferred embodiment of the invention, as shown in fig. 3, the invention provides an airborne sampling head capable of preventing water vapor from condensing and flowing backwards, which comprises a T-shaped pipe 1, wherein the ends of two lateral pipe orifices and two radial pipe orifices in the T-shaped pipe 1 are both in an open structure, the inner diameter of one pipe orifice in the lateral pipe orifices is smaller than that of the other pipe orifice, and a protrusion 3 is arranged at a position close to the radial pipe orifice in the other pipe orifice; the inner diameter of the pipe orifice at one side close to the inner end of the pipe is smaller than the inner diameter of the pipe orifice at one side close to the outer end of the pipe; the inner diameter of the pipe orifice at the other side close to the inner end of the pipe is smaller than the inner diameter of the pipe orifice at the other side close to the outer end of the pipe; the airborne sampling head capable of preventing water vapor from being condensed and flowing backwards further comprises an air inlet nozzle 2, and the air inlet nozzle 2 is fixed at the inner end of the pipe orifice on one side; the position of one end of the air inlet nozzle 2, which is far away from the inner end of the pipe, exceeds the vertical position of a radial pipe orifice of the T-shaped pipe 1; the inner diameter of the air inlet nozzle 2 close to the inner end of the pipe is larger than the inner diameter of the air inlet nozzle far away from the inner end of the pipe. Further, the arrow direction in fig. 3 indicates the direction in which the airflow flows.
As can be seen from fig. 3, since the extension of the nozzle 2 in the direction of the air flow exceeds the radial orifice, the air flow already exceeds the radial orifice when flowing out of the nozzle 2, so that the air flow does not enter directly into the radial orifice, thereby avoiding the condensation of water vapor in the radial orifice.
In addition, the invention also provides the application of the onboard sampling head capable of preventing the condensation and backflow of water vapor in the collection of air outside the aircraft cabin.
In the practical use process, the airborne sampling head capable of preventing water vapor from condensing and flowing backwards can be installed at any position outside an airplane cabin, the end part of the radial pipe orifice of the T-shaped pipe is connected with a detection device inside the airplane, and preferably, the direction of the air inlet is consistent with that of the airplane head, so that air can enter the air inlet more conveniently.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (6)
1. The utility model provides a can prevent machine of moisture refluence carries sampling head, a serial communication port, machine of can preventing moisture refluence carries sampling head includes T type pipe (1), wherein, the horizontal mouth of pipe in both sides and the radial orificial tip of both sides are open structure in T type pipe (1), radial mouth of pipe is all perpendicular with the horizontal mouth of pipe in both sides, the upper surface that one side mouth of pipe lower extreme is higher than the upper surface of opposite side mouth of pipe lower extreme in the horizontal mouth of pipe, the internal diameter that one side mouth of pipe is close to intraductal is less than the internal diameter that is close to tub outer end, and the intraoral radial mouth of pipe position of being close to of
The air enters from the nozzle at one side of the airborne sampling head, the end part of the radial nozzle is connected with an air suction device, so that part of the air reaching above the radial nozzle is led out from the radial nozzle, and the rest part of the air flows through the radial nozzle and flows out from the nozzle at the other side.
2. An airborne sampling head capable of preventing moisture backflow according to claim 1, wherein the inner diameter of the other side nozzle near the inner end of the tube is smaller than the inner diameter near the outer end of the tube.
3. The airborne sampling head capable of preventing water backflow according to claim 1, further comprising an air inlet nozzle (2), wherein the air inlet nozzle (2) is fixed at the inner end of the pipe orifice on one side.
4. An airborne sampling head capable of preventing moisture backflow according to claim 3, wherein the position of one end of the air inlet nozzle (2) far away from the inner end of the tube exceeds the vertical position of the radial nozzle of the T-shaped tube (1).
5. An airborne sampling head capable of preventing moisture backflow according to claim 3, wherein the inner diameter of the air inlet nozzle (2) near the inner end of the tube is larger than the inner diameter far away from the inner end of the tube.
6. Use of an airborne sampling head capable of preventing moisture backflow according to any of claims 1-5 for collecting air outside an aircraft cabin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611243084.7A CN106596200B (en) | 2016-12-29 | 2016-12-29 | Airborne sampling head capable of preventing water from flowing backwards and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611243084.7A CN106596200B (en) | 2016-12-29 | 2016-12-29 | Airborne sampling head capable of preventing water from flowing backwards and application thereof |
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| Publication Number | Publication Date |
|---|---|
| CN106596200A CN106596200A (en) | 2017-04-26 |
| CN106596200B true CN106596200B (en) | 2020-07-07 |
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| CN201611243084.7A Expired - Fee Related CN106596200B (en) | 2016-12-29 | 2016-12-29 | Airborne sampling head capable of preventing water from flowing backwards and application thereof |
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| CN106596200A (en) | 2017-04-26 |
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