JP2003236325A - Gas-liquid separator provided with drain valve - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a liquid from being entrained in a gas again and transported to an outlet. <P>SOLUTION: A casing is formed of an upper main body 1, a lower main body 2, an inlet/outlet member 3 and a bottom cover 4, and a revolving blade 14 is arranged in an annular space 13 formed by the upper main body 1 and an exhaust pipe 12. The upper part of the annular space 13 is connected to an inlet 5, and the inside hole of the exhaust pipe 12 is connected to the outlet 6. A revolving chamber 16 and a drain valve chest 17 are formed below the annular space 13, and a hollow and globular valve float 19 as a drainage valve is arranged in the drain valve chest 17. The upper end of the coil spring 20 is welded to the upper end of the external wall of the revolving chamber 16, and a partition member 21 for partitioning the revolving chamber 16 from the drain valve chest 17 is welded to the lower end of the coil spring 20. A gap 23 for liquid passage is formed between the outer circumferential edge of the partition member 21 and the inner circumferential wall of the upper main body 1. When a flow rate is high, the partition member 21 overcomes the elastic force of the coil spring 20, is displaced downwards, and when the flow rate is low, the partition member 21 is displaced upwards by the elastic force of the coil spring 20. <P>COPYRIGHT: (C)2003,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to swirling a liquid such as condensed water or condensed water mixed in a gas such as steam, compressed air or various gases into a casing. The present invention relates to a gas-liquid separator provided with a drain valve for generating a flow to separate the separated liquid by centrifugal force and discharging the separated liquid by a drain valve. 2. Description of the Related Art A conventional gas-liquid separator having a drain valve has a swirl vane disposed in an annular space formed by a casing and an exhaust pipe, and an upper portion of the annular space is connected to an inlet, and an exhaust pipe is provided. The upper part is connected to the outlet through a hole inside the swirl chamber, a swirl chamber is formed below the annular space, and a drain valve chamber is formed below the swirl chamber, and a drain valve is disposed in the drain valve chamber. And a liquid discharge valve chamber, wherein a partition member is arranged, and a gap for liquid passage is formed between the outer peripheral edge of the partition member and the inner peripheral wall of the casing. One example of this is disclosed in Japanese Utility Model Publication No. 63-24318. [0003] In the above-described gas-liquid separator provided with the drain valve of the prior art, the liquid which is swung outward by the action of centrifugal force and flows down along the outer peripheral wall of the swirl chamber. There is a problem that the efficiency of gas-liquid separation decreases when the gas is re-engaged with the gas flowing out to the outlet. In addition, depending on the velocity of the flowing fluid, that is, when the flow velocity is high, the minute liquid that has flowed down near the upper surface of the partition member collides with the upper surface of the partition member and is re-engaged with the gas that rebounds, and exits at the outlet. There was a problem of being carried out. [0004] It is therefore an object of the present invention to prevent liquid from being re-entrained in the gas and conveyed to the outlet. Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is to dispose a swirl vane in an annular space formed by a casing and an exhaust pipe, Is connected to the inlet, the upper part is connected to the outlet through a hole inside the exhaust pipe, and a swirl chamber is formed below the annular space and a drain valve chamber is formed below the swirl chamber to form the drain valve chamber. A liquid discharge valve is disposed in the swirl chamber and the liquid discharge valve chamber, and a partition member is disposed between the outer peripheral edge of the partition member and an inner peripheral wall of the casing. The partition member is connected to the other end of the coil spring whose side is connected to the upper part of the outer peripheral portion of the swirl chamber, and the position of the partition member can be changed up and down by the flow rate of the fluid. Gas-liquid separator. According to the above-mentioned technical means of the present invention, the liquid spouted outward by the action of the centrifugal force is swirled along a coil spring arranged on the outer periphery of the swirling chamber. Since the gas flows down the chamber, it is possible to prevent the gas from being caught in the gas again and carried out to the outlet. Further, when the flow velocity is high, the partition member is displaced downward by overcoming the elastic force of the coil spring, so that the flow velocity of the gas that collides with the upper surface of the partition member and rebounds can be reduced, and the upper surface of the partition member can be reduced. It is possible to prevent the minute liquid that has flowed down nearby from being caught in the gas again and carried out to the outlet.
When the flow velocity is low, the partition member is displaced upward by the elastic force of the coil spring, so that the drain valve chamber can be widened. An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 and 2). The casing is formed by welding the lower body 2 to the upper body 1, welding the entrance member 3 to the upper body 1, and fastening the bottom lid 4 to the lower body 2 by bolts.
The entrance member 3 has an entrance 5 and an exit 6 on the left and right, and an entrance flange 7 is welded to the entrance 5 and an exit flange 8 is welded to the exit 6. The bottom cover 4 has a drain port 9, and the drain port 9 communicates with a drain valve port 11 opened in a drain valve seat 10. The upper main body 1 has a cylindrical shape and a diameter of an upper inner surface is increased. On the annular step between the upper inner surface and the lower inner surface of the upper main body 1, a double substantially cylindrical exhaust pipe 12 is mounted, and the exhaust pipe 12 is fixed between the exhaust pipe 12 and the entrance member 3. The outer cylinder of the exhaust pipe 12 has a straight shape and is formed lower than the inner cylinder. The outer cylinder may be omitted and the upper body 1 may be used as well. The inner cylinder of the exhaust pipe 12 has a shape in which the upper portion is gradually expanded. A swirl vane 14 is formed integrally with the exhaust pipe 12 in an annular space 13 formed between the inner and outer cylinders of the exhaust pipe 12. The inlet 4 is connected to the lower annular space 13 through the communication hole 15, and the inside of the inner cylinder of the exhaust pipe 12 is connected to the upper outlet 6. A swirling chamber 16 is provided between the lower inner surface of the upper body 1 and the inner surface of the bottom cover 4, and the drain valve chamber 1 is provided below the swirling chamber 16.
7 is formed, and a hollow spherical valve float 19 as a drain valve is disposed in the drain valve chamber 17. The valve float 19 rises and falls according to the liquid level, opens and closes the drain valve port 11 of the drain valve seat 10, and discharges the liquid from the drain port 9 to the outside of the system. The upper end of the coil spring 20 is welded to the upper end of the outer peripheral wall of the swirl chamber 16, and the partition member 21 for separating the swirl chamber 16 and the drain valve chamber 17 is welded to the lower end of the coil spring 20. The partition member 21 has a disk shape and has four protrusions 22 on the outer periphery. A liquid passage gap 23 is formed between the outer peripheral edge of the partition member 21 between the protrusions 22 and the inner peripheral wall of the upper body 1.
The partition wall member 21 is displaced downward by overcoming the elastic force of the coil spring 20 when the flow velocity is high, and is displaced upward by the elastic force of the coil spring 20 when the flow velocity is low. The gas containing liquid entered from the inlet 5 is swirled by the swirling vanes 14. The liquid is swung outward by the action of the centrifugal force and separated, flows down the swirling chamber 16 along the coil spring 20 arranged on the outer periphery of the swirling chamber 16, and forms a liquid passage gap 23 between the projections 22. Then, it flows into the drain valve chamber 17. The liquid that has flowed into the drain valve chamber 17 is automatically discharged from the drain port 9 to the outside of the system by the floating of the valve float 19. The gas passing through the lower end of the exhaust pipe 12 flows out of the outlet 6 through the inside of the inner cylinder of the exhaust pipe 12. Since the liquid spouted outward flows down the swirl chamber 16 along the coil spring 20, it is possible to prevent the liquid from being re-engaged with the gas and carried out to the outlet 6. When the flow velocity is high, the coil spring 20
Since the partition wall member 21 is displaced downward by overcoming the elastic force of the partition wall member 21, the flow velocity of the gas that collides with the upper surface of the partition wall member 21 and rebounds can be reduced, and the minute flow that has flowed down near the upper surface of the partition wall member 21 can be reduced. The liquid can be prevented from being carried out to the outlet 6. When the flow rate is low, the partition member 21 is displaced upward by the elastic force of the coil spring 20, so that the drain valve chamber 17 can be widened. As described above, according to the present invention, the liquid spouted outward by the action of the centrifugal force flows down the swirling chamber along the coil spring, so that the liquid is reengaged with the gas and exits. When the flow velocity is high, the minute liquid that has flowed down near the upper surface of the partition member can be prevented by overcoming the elastic force of the coil spring and displacing the partition member downward. It is possible to prevent entrainment in the gas and carry out to the outlet, and when the flow velocity is slow, the partition member is displaced upward by the elastic force of the coil spring, thereby increasing the drain valve chamber. An excellent effect of being able to perform is produced.

[Brief description of the drawings] FIG. 1 is a cross-sectional view of a gas-liquid separator provided with a drain valve according to the present invention. FIG. 2 is a sectional view taken along line AA of FIG. [Explanation of symbols] 1 Upper body 2 Lower body 3 doorway members 4 Bottom lid 5 entrance 6 Exit 9 Drain outlet 10 Drain valve seat 11 Drain valve port 12 Exhaust pipe 13 Annular space 14 swirl vanes 16 Swivel room 17 Drain valve chamber 19 valve float 20 coil spring 21 Partition wall member 22 protrusion 23 Clearance for liquid passage

Claims (1)

Claims: 1. A swirl vane is arranged in an annular space formed by a casing and an exhaust pipe, and an upper part of the annular space is connected to an inlet,
The upper part is connected to the outlet through a hole inside the exhaust pipe, a swirl chamber is formed below the annular space and a drain valve chamber is formed below the swirl chamber, and a drain valve is arranged in the drain valve chamber, A partition member is arranged between the swirl chamber and the drain valve chamber, and a gap for liquid passage is formed between the outer peripheral edge of the partition member and the inner peripheral wall of the casing. A gas-liquid separator provided with a drain valve, wherein a partition member is connected to the other end of a coil spring connected to an upper portion, and the position of the partition member can be changed up and down depending on a flow rate of a fluid.