CN107727177B - Multifunctional element for controlling air flow - Google Patents
Multifunctional element for controlling air flow Download PDFInfo
- Publication number
- CN107727177B CN107727177B CN201710853101.7A CN201710853101A CN107727177B CN 107727177 B CN107727177 B CN 107727177B CN 201710853101 A CN201710853101 A CN 201710853101A CN 107727177 B CN107727177 B CN 107727177B
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- Prior art keywords
- glass tube
- flow
- multifunctional
- gas
- floating ball
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/74—Devices for measuring flow of a fluid or flow of a fluent solid material in suspension in another fluid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a multifunctional element for controlling air flow, which comprises a tapered glass tube with scales, a glass tube connected with the upper end of the tapered glass tube, an upper fixing piece for controlling the lifting of the glass tube, a floating ball arranged in the tapered glass tube, and a lower fixing piece connected with the lower end of the tapered glass tube. Compared with the prior art, the invention adopts a combined design, and integrates the flow display function, the flow limiting function and the non-return function.
Description
Technical Field
The invention relates to an air flow control device, in particular to an indicating, non-return and flow-limiting three-function element for manufacturing an air flow control all-inert material flow. The three functions of quality indication, non-return and flow limitation are integrated, and the device can be used in various air flow control occasions.
Background
In the process of gas flow control and display, a flow meter, a stabilizing valve and a check valve are commonly used elements, which have various forms and structures and are generally respectively installed on a gas circuit with complicated connection, for example, for mobile sampling, the sampling flow is complicated, the sampling device is not refined in structure, and the sampling speed of a sampling person is influenced. The devices usually include some metal components (such as stainless steel, etc.), which are liable to cause adsorption to the trace components in the gas sample during gas sampling, resulting in inaccurate sampling results, and it is difficult to disassemble and clean these components.
Chinese patent CN101678734A discloses an apparatus for controlling gas flow, comprising a valve assembly having at least two valves, wherein the valves in the valve assembly are rotatable between a first position and a second position; a drive device; a power module is coupled to the valve assembly and is movable in a first direction of movement by the drive mechanism while the valve is rotated from the first position to the second position. The power module is also movable in a second direction of movement by the drive means while the valve is rotated from the second position to the first position. In addition, the device also comprises an input device for inputting the required position of the valve; a sensing device for sensing the actual position of the valve; a selector device for selecting the first and second directions of movement, by means of which the valve can be rotated more quickly from the actual position into the desired position; a control device for controlling the drive device such that the power module rotates the valve from the actual position to the desired position in the direction of movement selected in the selection device. However, the device mainly adjusts the air flow through rotation, the sealing performance is poor, and the device cannot simultaneously realize multiple functions of flow indication, non-return, flow limitation and the like.
disclosure of Invention
The present invention is directed to overcome the above-mentioned drawbacks of the prior art and to provide a multifunctional device for controlling an air flow, which has multiple functions of indicating a flow rate, stopping flow, limiting flow, etc.
The purpose of the invention can be realized by the following technical scheme:
A multifunctional element for airflow control, comprising:
A tapered glass tube with scale for storing the sampling gas,
A glass tube connected with the upper end of the conical glass tube,
An upper fixing piece for controlling the lifting of the glass tube,
A polytetrafluoroethylene floating ball arranged in the conical glass tube and used for limiting the gas flow,
The lower fixing piece connected to the lower end of the conical glass tube can be matched with the polytetrafluoroethylene floating ball to realize a non-return function, and all the parts are made of inert materials, so that the adsorption of trace parts to gas is avoided.
Preferably, the glass tube can adjust the length inserted into the conical glass tube to adjust the height, and the upper and lower limits of the flow of the collected gas are adjusted by adjusting the lifting of the glass tube.
preferably, the side wall of the glass tube close to the bottom end is provided with a crack.
more preferably, the bottom end of the glass tube is provided with a cross-shaped slit.
Preferably, the upper fixing member is an upper gland made of polytetrafluoroethylene and a nut sleeved on the upper gland, and the upper gland is used as a pressure cap.
Preferably, the lower fixing member is a lower press cover made of polytetrafluoroethylene and provided with a connecting pipe.
When the instrument collects gas, the polytetrafluoroethylene floating ball in the tapered glass tube with scales floats when the gas passes through the tapered tube, and the floating height of the polytetrafluoroethylene floating ball depends on the gas flow in the tapered glass tube with scales. If the gas flow needs to be increased, the upper limit of the flow in the glass tube is increased or decreased by reading the scales on the conical glass tube with the scales, loosening the fixed screw cap for lifting the glass tube and adjusting the height of the liftable glass tube with the cross-shaped cracks. When the flow increases, the polytetrafluoroethylene floating ball rises to reach a certain height under the influence of the gas flow, when the flow in the pipe is collected to the specified flow, the polytetrafluoroethylene ball can block the main gas inlet of the crack glass pipe, and the gas can only enter from the crack opening, so that the purpose of flow limitation is achieved.
if the gas in the glass tube generates a reverse flow phenomenon, the floating ball can be influenced by the gas flow direction to fall down quickly to block an air inlet formed by the lower end of the conical glass tube and the lower gland, and the purpose of stopping the flow is achieved.
Preferably, a fastening clip is also included to secure the element during sampling.
Compared with the prior art, the invention adopts a combined design, integrates the flow display function, the flow limiting function and the non-return function, for example, the field installation step can be saved in field gas sampling, the labor is saved, the sampling working efficiency is improved, and the gas flow non-return function can ensure the purity of the gas. The gas flow control device can also be used on an instrument needing to control the gas flow, and the instrument is assisted to control the gas flow. The integrated compact design is more suitable for mobile sampling. The part contacting with the medium is made of glass and polytetrafluoroethylene, so that the adsorption problem of the micro-assembly is solved. And the cost is low, and the portable, quick detachable easily washs.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of the structure of the fastening clip.
in the figure, 1-glass tube, 2-screw cap, 3-upper gland, 4-conical glass tube, 5-floating ball, 6-lower gland and 7-fastening clip.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Example 1
A multifunctional element for controlling air flow is structurally shown in figure 1 and comprises a tapered glass tube 4 with scales and a glass tube 1 connected with the upper end of the tapered glass tube 4, wherein the glass tube 1 can be inserted into the tapered glass tube 4 by adjusting the length so as to adjust the height, the position of the glass tube is controlled by an upper gland 3 made of polytetrafluoroethylene and a nut 2 sleeved on the upper gland 3, and a cross-shaped crack is formed in the side wall, close to the bottom end, of the glass tube 1.
The inner of the conical glass tube 4 is provided with a floating ball 5 made of polytetrafluoroethylene, which can lift along with the airflow. The lower end of the conical glass tube 4 is connected with a lower gland 6 made of polytetrafluoroethylene. The components are made of inert materials, and adsorption of trace parts to gas is avoided.
When the gas is collected by the gas collecting device, the floating ball 5 in the tapered glass tube 4 with the scales floats when the gas passes through the tapered glass tube 4, and the floating height of the floating ball 5 depends on the gas flow in the tapered glass tube 4 with the scales. If the gas flow needs to be increased, the upper limit of the flow in the glass tube is increased or decreased by reading the scales on the conical glass tube 4 with the scales, loosening the screw cap 2 for controlling the lifting of the glass tube 1 and adjusting the height of the glass tube 1 with the cross-shaped cracks. When the flow increases, the floating ball 5 is influenced by the gas flow to rise to reach a certain height, when the flow in the pipe is collected to the specified flow, the floating ball 5 can block the main gas inlet under the glass pipe 1, and the gas can only enter from the crack opening formed on the side wall, so that the purpose of flow limitation is achieved, when the gas is released, the gas flow in the pipe is sharply reduced, and the floating ball 5 can automatically fall down. If the gas in the glass tube generates a reverse flow phenomenon, the floating ball 5 can be influenced by the gas flow direction to rapidly fall down to block an air inlet formed by the lower end of the conical glass tube 4 and the lower gland 6, so that the purpose of stopping the flow is achieved, and the three functions of flow indication, stopping the flow and limiting the flow are integrated.
example 2
a multifunctional member for controlling air flow has a structure substantially the same as that of embodiment 1, and further includes a fastening clip 7 as shown in FIG. 2, so that the member can be fixed at the time of sampling.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (6)
1. A multifunctional element for controlling an air flow, the element comprising:
a conical glass tube with a scale is arranged,
A glass tube connected with the upper end of the conical glass tube,
An upper fixing piece for controlling the lifting of the glass tube, wherein the upper fixing piece is an upper gland and a screw cap sleeved on the upper gland,
A floating ball arranged in the conical glass tube,
A lower fixing member connected to the lower end of the tapered glass tube;
The glass tube can be adjusted in height by adjusting the length of the glass tube inserted into the conical glass tube, a cross-shaped crack is arranged on the side wall of the glass tube close to the bottom end,
if the gas flow needs to be increased, the scales on the tapered glass tube with the scales are read, the screw cap on the glass tube with the cross-shaped cracks is loosened, the height of the glass tube with the cross-shaped cracks is adjusted to increase or reduce the upper flow limit in the tapered glass tube, when the flow is increased, the floating ball rises to a certain height under the influence of the gas flow, when the flow in the tube is collected to a specified flow, the floating ball can block the main gas inlet of the glass tube with the cross-shaped cracks, and gas can only enter from the cross-shaped cracks, so that the flow limitation is realized.
2. the multifunctional gas flow controlling element as claimed in claim 1, wherein the upper cover is a teflon cover.
3. The multifunctional element for controlling airflow according to claim 1, wherein the floating ball is made of teflon.
4. The multifunctional gas flow controlling element as claimed in claim 1, wherein the lower fixing member is a lower cover having a connecting pipe.
5. the multifunctional gas flow controlling element as claimed in claim 4, wherein the lower cover is a teflon cover.
6. The multifunctional airflow control member according to claim 1, further comprising a fastening clip for fixing the multifunctional airflow control member at the time of sampling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710853101.7A CN107727177B (en) | 2017-09-20 | 2017-09-20 | Multifunctional element for controlling air flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710853101.7A CN107727177B (en) | 2017-09-20 | 2017-09-20 | Multifunctional element for controlling air flow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107727177A CN107727177A (en) | 2018-02-23 |
| CN107727177B true CN107727177B (en) | 2019-12-13 |
Family
ID=61207263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710853101.7A Active CN107727177B (en) | 2017-09-20 | 2017-09-20 | Multifunctional element for controlling air flow |
Country Status (1)
| Country | Link |
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| CN (1) | CN107727177B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56615A (en) * | 1979-06-15 | 1981-01-07 | Mitsubishi Heavy Ind Ltd | Flowmeter |
| JPH1194607A (en) * | 1997-09-24 | 1999-04-09 | Sumitomo Heavy Ind Ltd | Rotameter |
| CN2854523Y (en) * | 2005-12-23 | 2007-01-03 | 北京海慧信息科技有限公司 | Gas flow sensor |
| CN200996841Y (en) * | 2006-07-04 | 2007-12-26 | 深圳大学 | Rotor flowmeter |
| JP2012078223A (en) * | 2010-10-01 | 2012-04-19 | Disco Abrasive Syst Ltd | Flow detection unit |
| CN107023696B (en) * | 2017-05-27 | 2019-04-19 | 上海化工研究院有限公司 | A kind of magnetic control one-way throttle valve |
-
2017
- 2017-09-20 CN CN201710853101.7A patent/CN107727177B/en active Active
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| Publication number | Publication date |
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| CN107727177A (en) | 2018-02-23 |
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| CB02 | Change of applicant information |
Address after: 200062 Shanghai city Putuo District Yunling Road No. 345 Applicant after: Shanghai Chemical Research Institute Co., Ltd. Applicant after: Shanghai Chemical Institute Testing Co., Ltd. Address before: 200062 Shanghai city Putuo District Yunling Road No. 345 Applicant before: Shanghai Chemical Research Institute Co., Ltd. Applicant before: Shanghai Tianke Chemical Detection Co., Ltd. |