JP4489377B2 - Gas-liquid separator with drainage valve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a condensate or condensed water mixed in a gas such as steam, compressed air or various gases, causing a swirl flow in the casing to separate the liquid by centrifugal force, and the separated liquid to be a drain valve The present invention relates to a gas-liquid separator equipped with a drainage valve that discharges by the above.
[0002]
[Prior art]
[Patent Document 1]
JP 2002-276890 A
A gas-liquid separator having a conventional drainage valve is disclosed in, for example, Japanese Patent Application Laid-Open No. 2002-276890. This gas-liquid separator equipped with a drainage valve has swirl vanes arranged in an annular space formed by a casing and an exhaust pipe, and the upper part of the annular space is connected to an inlet, and the upper part is exited through a hole inside the exhaust pipe. A swirl chamber below the annular space, a drain valve chamber below the swirl chamber, a drain valve disposed in the drain valve chamber, and the drain valve covered with a partition member. is there.
[0003]
[Problems to be solved by the invention]
The gas-liquid separator equipped with the conventional drainage valve described above is configured such that a mixed fluid of gas and liquid entering the annular space from the inlet is swirled by swirling blades, and the liquid is spouted outward by the action of centrifugal force, and the liquid is discharged from the casing. It flows down to the drain valve chamber along the inner peripheral wall and is automatically discharged by the drain valve, and the liquid separated gas flows out from the lower end of the exhaust pipe to the outlet through the inner hole. When there is a large amount of inflowing liquid, a part of the liquid is not spouted out and is carried to the outlet together with the gas flow, which causes a problem of poor gas-liquid separation efficiency.
[0004]
Therefore, the technical problem of the present invention is to prevent liquid from being carried out to the outlet.
[0005]
[Means for Solving the Problems]
The technical means of the present invention devised to solve the above technical problem is to arrange a swirl vane in an annular space formed by a casing and an exhaust pipe, connect the upper part of the annular space to an inlet, The upper part is connected to the outlet through the hole, a swirling chamber is formed below the annular space, a drain valve chamber is formed below the swirl chamber, and a drain valve is disposed in the drain valve chamber. What is covered with the partition member is a gas-liquid separator having a drain valve, wherein a bypass passage is formed to communicate the lower part of the inlet and the inside of the partition member of the drain valve chamber.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
When the amount of liquid flowing into the inlet is large, the liquid and gas flow through the inlet as a two-phase flow in which the liquid flows in the lower part and the gas flows in the upper part. The present invention, since the inside of the inlet of the lower and drain valve chamber of the partition wall member is obtained by forming a bypass passage communicating with the inner partition wall member of the direct drainage valve chamber liquid flowing bottom inlet through the bypass passage The gas flowing in the upper part of the inlet and a part of the liquid flow down into the annular space. As described above, since the amount of liquid flowing down into the annular space can be reduced, the liquid can be reliably swung out by the action of centrifugal force, and the liquid is not carried out to the outlet together with the gas flow.
[0007]
【Example】
An embodiment showing a specific example of the above technical means will be described (see FIG. 1). The casing is formed by fastening the lower body 2 to the upper body 1 with bolts and fastening the bottom lid 3 to the lower body 2 with bolts. The upper body 1 has an inlet 4 and an outlet 5 on the left and right. The bottom lid 3 has a drainage port 6, and the drainage port 6 communicates with a drainage valve port 8 opened in the drainage valve seat 7.
[0008]
A double substantially cylindrical exhaust pipe 10 is placed on the inner end of the upper surface of the lower main body 2, and the exhaust pipe 10 is fixed between the upper main body 1. The outer cylinder of the exhaust pipe 10 is straight and formed lower than the inner cylinder. The outer cylinder can be omitted, and the main body 1 can also be used. The inner cylinder of the exhaust pipe 10 has a shape in which the upper end portion gently expands upward and the lower end portion gently expands downward. A tapered screen 9 is placed on the outer end of the upper surface of the outer cylinder of the exhaust pipe 10 and fixed between the outer periphery of the upper end of the inner cylinder of the exhaust pipe 10. A swirl vane 12 is formed integrally with the exhaust pipe 10 in an annular space 11 formed between the inner and outer cylinders of the exhaust pipe 10. The inlet 4 is connected to the lower annular space 11 through the screen 9, and the inner side of the inner cylinder of the exhaust pipe 10 is connected to the upper outlet 5.
[0009]
A swirl chamber 14 is formed between the inner surface of the lower main body 2 and the inner surface of the bottom lid 3, and a drain valve chamber 15 is formed below the swirl chamber 14. A hollow spherical valve float 16 serving as a drain valve is disposed in the drain valve chamber 15. The valve float 16 rises and falls according to the liquid level, opens and closes the drain valve port 8, and discharges only the liquid from the drain port 6 to the outside of the system. The valve float 16 is covered with a reverse cup-shaped partition member 17. The partition member 17 has a hemispherical upper part and a cylindrical shape around the upper part, and has two legs 18 projecting to the near side and the far side at the lower end, and the legs 18 are fixed to the bottom lid 3 with screws. The partition member 17 has a liquid passage opening 19 that communicates inside and outside at the lower end, and two vent holes 20 that communicate between inside and outside at the top. One end of the bypass pipe 21 is connected to the lower end of the inlet 4. The other end of the bypass pipe 21 penetrates the lower main body 2 and is connected to the partition wall member 17. The bypass pipe 21 communicates the lower end of the inlet 4 and the inside of the partition member 17 of the drain valve chamber 15 through a bypass passage 22 .
[0010]
The fluid flowing in the inlet 4 as a two-phase flow is such that the liquid flowing in the lower part of the inlet 4 flows directly into the inside of the partition member 17 of the drain valve chamber 15 through the bypass passage 22 and matches the gas flowing in the upper part of the inlet 4. Part of the liquid flows down into the annular space 11. The gas and a part of the liquid that have entered the annular space 11 are swirled by the swirl vanes 12, and the liquid is spouted to the outside by the action of centrifugal force, and the drainage valve along the inner peripheral walls of the upper main body 1 and the lower main body 2. It flows down into the chamber 15. The valve float 16 rises and falls according to the liquid level, opens and closes the drain valve port 8, and discharges only the liquid from the drain port 6 to the outside of the system. The gas from which the liquid has been separated flows out from the outlet 5 through the inner hole from the lower end of the inner cylinder of the exhaust pipe 10.
[0011]
【The invention's effect】
As described above, according to the present invention, since the amount of liquid flowing down into the annular space can be reduced, the liquid is not carried to the outlet together with the gas, and the gas-liquid separation efficiency can be improved. Produces an effect.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a gas-liquid separator of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Upper main body 2 Lower main body 3 Bottom cover 4 Inlet 5 Outlet 6 Drain outlet 8 Drain outlet valve 10 Exhaust pipe 11 Annular space 12 Swirling blade 14 Swivel chamber 15 Drain valve chamber 16 Valve float 17 Partition member 21 Bypass pipe 22 Bypass aisle

Claims (1)

A swirl vane is disposed in an annular space formed by a casing and an exhaust pipe, the upper part of the annular space is connected to the inlet, the upper part is connected to the outlet through a hole inside the exhaust pipe, and the swirl chamber and the lower part are connected to the lower part of the annular space. A drainage valve chamber is formed below the swirl chamber, the drainage valve is disposed in the drainage valve chamber, and the drainage valve is covered with a partition wall member. A gas-liquid separator provided with a drainage valve, characterized in that a bypass passage communicating inside is formed.

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