JPH0453511Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a steam/water separator that is attached to steam piping, etc., and separates water droplets from the steam and discharges the water to the outside of the system. It relates to the structure of the partition wall that separates the area leaving behind.

The separation efficiency of a separator that swirls the fluid and shakes out water droplets in the steam to the outside by the action of centrifugal force improves the separation efficiency as the fluid swirls more strongly. but,
The drain valve part is designed so that the separated water droplets can flow in.
Since it is spatially continuous with the separation part, the stronger the turning, the more it will be affected, and the normal operation of the drain valve will be hindered.

BACKGROUND ART Conventionally, a partition wall of a steam/water separator as shown in Japanese Utility Model Publication No. 62-42238 has been used. This has an air/water separation section using centrifugal force above.
In a steam/water separator that has a drain valve section at the bottom and is separated by a partition wall leaving a gap between which water droplets can flow, the partition wall is shaped like a vertically long inverted cup, and an opening is opened at the lower end of the partition wall to communicate between the inside and outside of the partition wall. , a baffle plate is placed in the communication opening to weaken the swirling water flow, and even if the gap through which the water droplets flow is enlarged, the baffle plate makes it less susceptible to the effects of the swirling flow, and once separated water droplets are transported to the outlet again. This prevents the water accumulated in the drain valve portion from forming a concave shape due to swirling flow, so that the normal operation of the drain valve is not hindered.

Problems to be Solved by the Present Invention In the above-mentioned conventional technology, although the normal operation of the drain valve is not hindered, there is an inconvenience that once separated water droplets are carried to the outlet together with gas. In other words, the partition wall has an inverted cup shape, and the swirling flow can be weakened only at the bottom of the partition wall where the baffle plate is provided, and the swirling flow is not weakened at all on the sides and top of the partition wall and flows toward the outlet side. This is because the water droplets that have been separated and adhered to the outer surface of the partition wall are carried to the outlet along with the gas as the water changes direction and exits.

If the gap through which the water droplets flow is made smaller, the influence of the swirling flow will be reduced, but if a large amount of water flows in, the flow into the drain valve will be delayed and will stagnate, causing it to be carried to the outlet along with the gas.

Therefore, the technical problem of the present invention is to make the gap through which water drops normally flow so small that the drain valve part is not affected by the swirling flow, and at the same time to make the gap large enough to prevent water from stagnation when a large amount of water flows in. The objective is to ensure that the water droplets once separated are not transported to the outlet together with the gas again.

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problems is to provide a separation section in the upper space that separates air and water using centrifugal force due to swirling, and a drain valve in the lower space. In a steam/water separator in which the separation part and the drain valve part are separated by a partition wall leaving a gap for water droplets to flow between the separation part and the drain valve part, a part or the whole of the partition wall is formed of a thermally responsive member, and a low-temperature When the temperature reaches a predetermined temperature, the gap increases, and when the temperature reaches a predetermined temperature, the gap decreases.

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

A large amount of water flows in when the fluid temperature is relatively low, such as at the beginning of steam venting. The partition wall formed of a thermally responsive member forms many gaps at low temperatures, and a large amount of water flows into the drain valve portion without stagnation. Furthermore, since the flow velocity of the fluid is low at the beginning of ventilation, the swirling flow is also low, and even if there are many gaps, the drain valve section will not be affected. When a steady state is reached, the temperature of the piping and equipment increases and large amounts of water are no longer generated, the gap between the partition walls becomes smaller, and the drain valve section is no longer affected by the swirling flow.

Effects of the invention When a large amount of water flows in, the gap created by the partition wall is large, and the water does not stay in the separation section and is not carried to the outlet together with the gas. Further, under normal conditions, the gap is small and the drain valve section is not affected by the swirling flow.

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

An upper body 3 provided with an inlet 1 and an outlet 2, and a separation part 4
A main body 6 having a drain valve portion 5 is coupled with bolts 30, and a lid member 7 is coupled to the main body 6 with bolts 31 to form a casing.

The separation section 4 is formed by concentrically arranging a swirling vane 8 for swirling the fluid flowing in from the inlet 1 and a draining tube 9. The inside of the drainer tube 9 is the outlet 2
communicate with. Fluid containing water droplets flowing in from the inlet 1 is swirled by swirling vanes 8, and water droplets with a large mass are swung outward by centrifugal force and flow down along the inner wall of the main body 6 to reach the drain valve portion 5. The fluid after the water droplets have been separated passes through the interior of the drainer tube 9 and reaches the outlet 2.

The drain valve section 5 is formed by arranging a hollow float 11 in a free state in a drain valve chamber 10 and screwing a valve seat 12 onto the lid member 7.

A semi-disc-shaped bulkhead 2 is placed on the top of the hollow float 11.
0 and 21 are attached via the partition wall attachment member 22. The partition wall 21 is attached so as to be slidable in the horizontal direction, and one end 23 of the partition wall 20 and the end of the partition wall 21 are connected by a coiled bimetal 24. One end 33 of the partition wall attachment member 22 is fixed by sandwiching the main body 6 between the lid members 7. The bulkhead mounting member 22 also serves to retain the movement of the hollow float 11. A holding rod 32 for holding the movement of the hollow float 11 is attached to the partition wall 21.

At the beginning of steam ventilation, that is, when the temperature of the fluid passing through the casing is low, the coiled bimetal 24 contracts and connects the partition 21 to the partition mounting member 2.
2 side, a large gap is formed between the separation part 4 and the drain valve part 5 (solid line part in FIG. 1). A large amount of water flowing in from the inlet 1 immediately flows down into the drain valve chamber 10 through the above-mentioned large gap, floats the hollow float 11, opens the valve port 13 provided in the valve seat 12, and drains the drain port 34. is discharged from the system. When a steady state is reached after ventilation, the casing reaches a predetermined temperature, and the coiled bimetal 24 expands and moves the partition wall 21 toward the inner peripheral wall of the main body 6.
Reduce the gap with the inner peripheral wall (2 in Figure 1)
(dot-dashed line). When a steady state is reached, the temperature of the piping and equipment increases, the amount of water generated decreases, and the flow rate of the fluid passing through the casing increases. Even if the flow velocity of the fluid increases, the gap between the separation part 4 and the drain valve part 5 is small, so the swirling flow in the separation part 4 hardly reaches the drain valve part 5, and the drainage valve part 5 absorbs the swirling flow. It will not be affected.

In this embodiment, the partition walls 20 and 21 are formed of two semicircular plates connected by a bimetal 24, but they can also be formed of a single bowl-shaped bimetal.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a steam separator having a partition wall according to an embodiment of the present invention. 1...Inlet, 2...Outlet, 3...Upper body, 4...
...Separation part, 5...Drain valve part, 6...Main body, 8...
Swirling vane, 10... Drain valve chamber, 20, 21... Partition wall, 22... Partition wall mounting member, 24... Bimetal, 32... Holding rod.

Claims (1)

[Scope of utility model registration request] A separation part that separates air and water using centrifugal force due to swirling is provided in the upper space, and a drain valve part is arranged in the lower space.
In a steam/water separator in which the separation part and the drain valve part are separated by a partition wall leaving a gap for water droplets to flow, part or all of the partition wall is formed of a thermally responsive member, so that the above gap increases when the temperature is low. The structure of a partition wall of a steam/water separator is such that the gap becomes smaller when a predetermined temperature is reached.