KR20170086787A - Gas pressure control unit using porous material - Google Patents
Gas pressure control unit using porous material Download PDFInfo
- Publication number
- KR20170086787A KR20170086787A KR1020160006226A KR20160006226A KR20170086787A KR 20170086787 A KR20170086787 A KR 20170086787A KR 1020160006226 A KR1020160006226 A KR 1020160006226A KR 20160006226 A KR20160006226 A KR 20160006226A KR 20170086787 A KR20170086787 A KR 20170086787A
- Authority
- KR
- South Korea
- Prior art keywords
- control unit
- pressure control
- porous member
- gas pressure
- main body
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/20—Arrangements or systems of devices for influencing or altering dynamic characteristics of the systems, e.g. for damping pulsations caused by opening or closing of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/04—Control of fluid pressure without auxiliary power
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The present invention relates to a gas pressure control unit using a porous material,
A main body provided with an inflow hole on one side and an outflow hole on the other side; A porous member provided on an inlet hole side in the main body; And a sealing plate for sealing one side of the porous member
The downstream pressure of the gas piping system can be more stably controlled by changing the gas flow to have linear flow characteristics.
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gas pressure control unit using a porous material, and more particularly, to a gas pressure control unit capable of stably maintaining a pressure of a gas through a porous member.
Generally, in a gas flow piping system, a gas governor unit is used to regulate downstream pressure.
For example, as shown in Fig. 1, a pilot valve is installed in the city gas regulator to control the pressure.
Fig. 1 is a conceptual diagram of a gas pressure control unit according to the prior art, and Fig. 2 is a schematic view of a gas pressure control unit using a conventional needle valve.
The pilot valve is mainly composed of a tube connecting the diaphragm chamber and the piping system, thereby controlling the secondary pressure and the pressure of the main pipe.
However, as shown schematically in FIG. 2, resonance due to the vibration of the airflow may occur in the tube due to the driving of the pilot valve, or, as the case may be, a large peeling flow (for example, an orifice or a needle valve) The secondary flow is severely fluctuated and the control performance is deteriorated.
Further, when a certain pressure condition is reached, the flow chokes at the pressure reducer part and can no longer perform the pressure control function.
These can eventually affect the pressure of the main pipe, which can paralyze the control function and, in some cases, damage the gas piping system.
Conventionally, many technical methods have been proposed to solve such technical problems.
In order to reduce the noise / vibration energy mainly generated in the valves, they were designed to appropriately distribute the noise / vibration energy or design the volume of the downstream piping system so as to attenuate the pressure vibration.
For example, a pneumatic restriction-chamber circuit using an orifice or a needle valve has been proposed for the purpose of blocking the effect of pressure oscillation.
This method is known to have been used in some industrial processes, but it has a disadvantage in that the pressure response gain varies with the amplitude of the pressure vibration due to the nonlinear flow characteristics of the orifice and the needle valve.
The following patent document 1 discloses a regulator control system that makes it possible to perform more accurate regulator control by correcting the characteristic value for regulator pressure control so as to approach the actual pressure value.
The regulator control system of Patent Document 1 includes a regulator for regulating the supply pressure of the city gas to a constant level by providing a gasket unit for controlling the amount of gas passing therethrough; A pilot for controlling a gas pressure of the jacket unit; A remote setter coupled to one side of the pilot lot to vary the pressure of the elastic member of the pilot to set the supply pressure; A potentiometer which is provided in the remote setter and rotates in accordance with a linear movement of an axis for controlling the pressure of the elastic member to output a current position at which the axis moves, as a resistance value; A data converter for converting a resistance value output from the potentiometer into a corresponding pressure value; Information on the resistance value and the actual pressure value obtained by measuring the potentiometer and the regulator is held for each section divided into a plurality of resistance values and a section including the resistance value output from the potentiometer is searched And a correcting unit for correcting the pressure value according to the following equation.
As described above, in the gas pressure control unit according to the related art, due to the nonlinear flow characteristic of the gas flow, the response gain changes according to the amplitude of the pressure oscillation, and thus the gas pressure can not be stably controlled, Thereby deteriorating the performance of the apparatus.
The object of the present invention is to solve the problems of the gas pressure control unit according to the prior art, and to provide a porous material which can stably control the gas pressure by converting a gas flow into a laminar flow, And a gas pressure control unit using the gas pressure control unit.
In order to achieve the above object, a gas pressure control unit using a porous material according to the present invention comprises: a main body having an inlet hole on one side and an outlet hole on the other side; A porous member provided on an inlet hole side in the main body; And a sealing plate for sealing one side of the porous member.
The gas pressure control unit using the porous material according to the present invention is characterized in that the main body is of a tubular type closed at all sides, and the diameter of the inlet hole and the diameter of the outlet hole are formed to be the same.
The gas pressure control unit using the porous material according to the present invention is characterized in that the porous member has a cylindrical shape with both sides opened and a first flow path is provided therein.
The gas pressure control unit using the porous material according to the present invention is formed such that the diameter of the porous member is smaller than the diameter of the main body and the length of the left and right sides of the porous member is smaller than the left and right lengths of the main body, And a third flow path is provided between one side of the porous member and one side of the main body in which the outlet hole is formed.
The gas pressure control unit using the porous material according to the present invention is characterized in that the sealing plate seals one side of the first flow path of the porous member so that the gas of the first flow path inside the porous member is not directly discharged to the third flow path side.
According to the gas pressure control unit using the porous material according to the present invention, the flow of the gas is converted into the laminar flow through the porous member to have the linear flow characteristic, so that the downstream pressure of the gas piping system can be more stably controlled .
According to the gas pressure control unit using the porous material according to the present invention, the gas pressure can be efficiently controlled and the performance of the gas pressure control system can be greatly improved.
1 is a conceptual view of a gas pressure control unit according to the prior art,
2 is a schematic view of a gas pressure control unit using a conventional needle valve,
3 is a longitudinal sectional view of a gas pressure control unit using a porous material according to a preferred embodiment of the present invention,
4 is a perspective view of the gas pressure control unit using the porous material according to the preferred embodiment,
5 is a graph comparing nonlinear flow characteristics and linear flow characteristics of a gas flow.
Hereinafter, the gas pressure control unit using the porous material according to the present invention will be described in detail with reference to the accompanying drawings.
In the following, the terms "upward", "downward", "forward" and "rearward" and other directional terms are defined with reference to the states shown in the drawings.
FIG. 3 is a longitudinal sectional view of a gas pressure control unit using a porous material according to a preferred embodiment of the present invention, and FIG. 4 is a perspective view of a gas pressure control unit using the porous material according to the preferred embodiment of the present invention.
The gas pressure control unit 100 using the porous material according to the preferred embodiment of the present invention includes a
The
In the illustrated embodiment, the diameter of the
The
The
That is, the left end of the
The
A second flow path S2 is provided between the outer circumferential surface of the
The sealing plate 130 is installed at the right end of the
The sealing plate 130 seals the right side portion of the first flow path S1 of the
The gas pressure control unit 100 using the porous material according to the preferred embodiment of the present invention is configured such that the gas introduced into the interior of the
The gas introduced into the first flow path S1 in the
The gas of the second flow path S2 flows into the
5 is a graph comparing the non-linear flow characteristics and the linear flow characteristics of the gas flow.
Since the gas pressure control unit 100 using the porous material according to the preferred embodiment of the present invention passes through a very small number of pores of the
According to the gas mechanics theory, the flow through a very small tube or hole with a diameter of several ㎛ to several tens of ㎛ is almost a laminar flow as given by the following equation.
Q = πr 2 ΔP / μL
Where Q is the flow rate through the pipe, r is the radius of the pipe,? P is the pressure difference between the pre / post stages of the microtubule,? Is the viscosity of the gas, L is the length of the pipe .
As can be seen from the above equation, for a given microtubule, the flow rate Q is linearly proportional to the differential pressure [Delta] P.
Therefore, since microtubes have linear flow characteristics, they can be used for measurement of unsteady flow.
In general, the porous material contains a very fine number of pores, so that the flow through these pores is a laminar flow.
The gas pressure control unit 100 using the porous material according to the preferred embodiment of the present invention utilizes the characteristics of the laminar flow, thereby greatly improving the performance of the gas pressure control system.
Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.
100: Gas pressure control unit using porous material
110:
120: Porous member
130: sealing plate
Claims (5)
A porous member 120 installed on the side of the inlet hole 111 inside the main body 110;
And a sealing plate (130) for sealing one side of the porous member (120).
Wherein the main body (110) is a cylindrical type closed at four sides, and the diameter of the inlet hole (111) is equal to the diameter of the outlet hole (112).
The gas pressure control unit using a porous material according to claim 1, wherein the porous member (120) has a cylindrical shape with both open sides and a first flow path (S1).
The porous member 120 is formed to have a smaller diameter than the main body 110 and the left and right lengths of the porous member 120 are smaller than the left and right lengths of the main body 110, And a third flow path S3 is provided between one side of the porous member 120 and one side of the inside of the main body 110 where the outflow hole 112 is formed A gas pressure control unit using a porous material.
The sealing plate 130 seals one side of the first flow path S1 of the porous member 120 so that the gas of the first flow path S1 inside the porous member 120 is not discharged directly toward the third flow path S3 Wherein the gas pressure control unit uses a porous material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160006226A KR20170086787A (en) | 2016-01-19 | 2016-01-19 | Gas pressure control unit using porous material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160006226A KR20170086787A (en) | 2016-01-19 | 2016-01-19 | Gas pressure control unit using porous material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20170086787A true KR20170086787A (en) | 2017-07-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020160006226A KR20170086787A (en) | 2016-01-19 | 2016-01-19 | Gas pressure control unit using porous material |
Country Status (1)
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| KR (1) | KR20170086787A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230033280A (en) | 2021-09-01 | 2023-03-08 | 대한민국(관리부서: 행정안전부 국립과학수사연구원장) | Piping Structure Having Shut-off Valve For Fire Prevention |
-
2016
- 2016-01-19 KR KR1020160006226A patent/KR20170086787A/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230033280A (en) | 2021-09-01 | 2023-03-08 | 대한민국(관리부서: 행정안전부 국립과학수사연구원장) | Piping Structure Having Shut-off Valve For Fire Prevention |
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