JPH039600Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a separator that is attached to gas piping for steam, compressed air, etc. to separate water in the gas (for example, condensed water) and remove it from the system. In particular, it relates to a separator that generates a swirling flow within the separator casing to separate air and water, and discharges the separated water to the outside of the casing using an automatic drain valve.

This type of steam/water separator swirls the fluid in the upper part of the casing, shakes out water droplets in the gas to the outside using centrifugal force, and separates the water, allowing the gas to pass through to the secondary side and letting the water droplets flow down. The water is then automatically drained out of the casing using a self-powered drainage valve located at the bottom of the casing. If the centrifuged water droplets are allowed to flow down to the drain valve section and are prevented from being re-engulfed by the gas flow heading toward the secondary side, the separation efficiency will be improved.

Prior Art Therefore, conventionally, as shown in Japanese Utility Model Application Publication No. 57-25721, a cylindrical cylinder with its lower part facing downward was installed at the bottom of a swirling vane for swirling the fluid provided at the upper part of the casing. A shaped draining member was placed. The draining member is double partitioned into an inner and outer part so that the fluid swirled by the swirling vanes does not immediately go to the secondary side, and also directs water droplets in the fluid that are swung outward by the action of centrifugal force toward the inner circumferential wall of the casing. It is made to flow down.

Problems to be Solved by the Present Invention Even with the above method, a problem arises in that the separated water droplets are carried away with the gas to the secondary side.

In other words, the stronger the swirling by the swirling blades, the more water droplets in the gas are swung outward, and the efficiency of separating air and water by swirling increases. This is because water droplets flowing down along the inner circumferential wall of the gas flow are likely to be caught up in the gas flow again.

The technical problem of the invention is to prevent separated water droplets from being re-engulfed by the gas flow.

Means for Solving the Problems The technical means of the present invention, which was designed to solve the above-mentioned technical problems, is to make the draining member approximately cylindrical in shape, and to provide a downwardly expanding portion at the lower end thereof. It is formed in multiple stages.

Effect The operation of the above technical means is as follows.

The fluid entering from the inlet is swirled in the upper part of the casing by means such as swirl vanes. Water droplets in the fluid are separated and thrown out by the action of centrifugal force. The swirling flow between the draining member and the inner circumferential wall of the casing moves toward the inner circumferential wall of the casing each time it hits the plurality of widened portions formed at the lower part of the draining member, and the flow velocity of the swirling flow decreases. Therefore, the separated water droplets reliably flow down along the inner circumferential wall of the casing, and since the flow velocity of the swirling flow has decreased, they pass through the lower end of the draining member and are drawn back into the gas flow heading toward the secondary side. You will no longer have to worry about it.

Effect of invention The present invention produces the following specific effects.

Since the separated water droplets are not re-engulfed by the gas flow, the steam/water separation efficiency is improved.

Since the flow velocity of the swirling flow passing through the lower end of the draining member is reduced, the water surface of the drain valve portion is not disturbed by the swirling flow, and malfunction of the drain valve can be prevented.

Embodiment An embodiment illustrating a specific example of the above technical means will be described (see FIG. 1).

The illustrated embodiment includes a steam separator 2 according to the present invention,
It is integrally combined with a pressure reducing valve 1 for steam.

A substantially cylindrical drainage member 4 and a tapered screen 5 are arranged concentrically around a main valve 3 of a pressure reducing valve 1. A connecting rod 21 is integrally formed on the central axis inside the draining member 4 via a rib, and guides the lower part of the main valve 3. The inlet 6 is connected to the outer periphery of the screen 5, and the valve port of the main valve 3 is connected to the outlet 7.

The space between the screen 5 and the draining member 4 is connected to the upper part of the steam separator 1 through a through hole 8. A swirling blade 9 is integrally formed at the center of the outer periphery of the draining member 4.

A portion that gently expands outward is formed at the lower part of the draining member 4, and portions 20 that expand further downward from the inner periphery of the lower portion are successively formed. In this embodiment, three stages are formed. The expanded portions 20 are arranged so that the spaces between the plurality of expanded portions 20 of the draining member 4 and the inner circumferential wall of the casing 10 are approximately the same.
Determine the diameter of each tip. The inside of the draining member 4 is connected to a space where the main valve 3 is located through a through hole 11.

The casing 10 has a cylindrical upper part and a downwardly expanding lower part. casing 10
A lower cover 12 is attached to the lower end of the drain valve 12 with bolts to form a drain valve chamber 17 inside. A spherical float 18 is housed in the drain valve chamber 17.

A float seat 13 is formed on the lower lid 12.
A drain valve seat 14 is attached to the inner end of the drain port 15. A float cover 19 is attached to cover the float 18. The float cover 19 is placed on the same axis as the main valve 3 by fitting its upper part into the lower end of the connecting rod 21, and is attached by being sandwiched between the flange portion of the casing 10 and the lower cover 12. float cover 1
A connecting opening 22 is opened at the bottom of 9. Reference number 16 is a ventilation hole provided in the upper part of the partition member 14.

The fluid entering from the inlet 3 is swirled by the swirling vanes 9, and water droplets in the fluid are swung outward by the action of centrifugal force and flow toward the inner circumferential wall of the casing 10 at the expanded portion 20 of the draining member 4. It flows down along the inner peripheral wall. The gas flow passing through the lower end of the draining member 4 passes from the inside of the draining member 4 through the through hole 11 toward the main valve 3 of the pressure reducing valve 2, and flows out to the outlet 7.

The separated water enters the interior through the connection opening 22 of the float cover 19. At this time, the gas inside the float cover 19 exits to the outside through the ventilation hole 16. The float 18 ascends and descends according to the water level, opens and closes the drain valve port of the drain valve seat 14, and drains the drain port 1.
Only water is discharged from step 5 to the outside of the system.

[Brief explanation of the drawing]

FIG. 1 is a partial sectional view of a steam separator according to the present invention combined with a pressure reducing valve. DESCRIPTION OF SYMBOLS 1... Pressure reducing valve, 2... Gas water separator, 8... Draining member, 9... Swivel vane, 10... Casing, 12... Lower lid, 18... Float, 19...
float cover.

Claims (1)

[Scope of utility model registration request] In a steam and water separator, a separation section that separates air and water using centrifugal force due to swirling is arranged in an upper space in a casing, a drain valve section is arranged in a lower space of the separation section, and a draining member is arranged to separate the separation section into two parts: A structure of a draining member for a steam/water separator, in which the draining member has a substantially cylindrical shape, and a plurality of stages of downwardly expanding portions are formed at the lower end of the draining member.