JPS6170296A - Drain trap with steam separator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Technical field The present invention relates to condensate (condensate) generated in steam systems and compressed air systems.
Drain traps that separate steam and air from steam and air and discharge them outside the system, especially those that create a swirling flow within the trap casing to separate air and water, and discharge the separated water to the outside of the casing with an automatic drain valve. Regarding.

The invention concerns making the drain valve as unaffected as possible by swirling flows.

Technical background This type of drain trap swirls the fluid in the upper part of the casing, separates the water by the action of centrifugal force, and drains the water that has accumulated in the lower part of the casing to the outside of the casing using a self-cutting drain valve. The drain valve is one that detects the water level with a float and operates the valve, and a diaphragm is placed at the bottom of the casing, and pressure corresponding to the water level is applied to one side of the diaphragm. Generally, devices are used that operate a valve connected to the diaphragm by deforming or displacing the diaphragm.All of these devices operate by detecting the water level, and if the water surface of the drain is disturbed by swirling flow, it may cause a mistake. The valve operates and leaks steam and air. Also, the valve opens and closes more frequently than necessary, resulting in wear and tear on the valve.

Prior art and its problems Therefore, in the past, a bulkhead was installed inside the trap casing.
The practice was to separate the drain valve chamber from the swirling chamber above it. An example of this is shown in Japanese Utility Model Publication No. 58-19437. As seen in this publication, the conventional bulkhead member is an umbrella-shaped disk with a downwardly concave curve, and a narrow annular space is created between the outer peripheral edge and the cylindrical inner wall of the trap casing. It is set up and arranged.

In this case, if the above-mentioned gap is narrowed to reduce the influence of the swirling flow in the swirling chamber, it will be difficult for the drain to flow into the lower part of the drain valve chamber, and the separated drain will be caught up in the gas again and flow downstream. There was a problem with being carried away.

Technical Problem The technical problem of the present invention is to make it easy for drain to flow in even if the space around the outer periphery of the partition means is narrow.

Technical Means The technical means of the present invention taken to solve the above technical problems are as follows: (a) A narrow space is provided between the partition wall member and the inner circumference of the trap casing, and the partition wall member is inserted into the trap casing. (b) Drill a circulation hole near the center of the bulkhead member! =, something.

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

Fluid entering from the inlet is swirled in the swirl chamber by means such as swirl vanes. Due to this swirling, the pressure in the swirling chamber becomes higher at the outer culm and lower at the inner side. In the partition wall member, the pressure is higher in the gap on the outer periphery than in the circulation hole on the inside.
Condensate flows down through the gap, and gas in the drain valve chamber below the partition member is sucked up through the circulation hole. In this way, even if the space around the outer periphery of the partition member is narrow, the drain can easily flow downward.

Unique effects The present invention produces the following unique effects.

Even if the space around the outer periphery of the partition wall member is narrowed, the drain can still pass through, which not only strengthens the swirling flow and improves the separation efficiency of air and water, but also shortens the distance between the swirling chamber and the drain valve chamber. The trap casing can be made smaller.

DESCRIPTION OF EMBODIMENTS An embodiment illustrating a specific example of the above technical means will be described (see drawings).

A bottom member 16 is attached to the main body 1 in a gas-tight manner with bolts 17 to form a trap casing.

The main body 1 has a fluid inlet 2 and an outlet 3 formed on the same line at the upper part, a cylindrical shape below the main body 1, and a tapered shape that widens downward. The upper part of the body 1 has a double cylindrical shape, with an inlet 2 connected to the surrounding area and an outlet 3 connected to the central hole.

The exhaust pipe 8 is screwed to the inner cylindrical protrusion 21 . At that time, the metal washer 22, the rotating blade 6, the draining member 7
Clamp and secure. An intake port 9 is located on the side wall of the lower end of the exhaust pipe 8. Therefore, the inlet 2 is connected to the swirl chamber 4 in the upper part of the valve chamber, and the swirl chamber 4 is connected to the outlet 3 through the suction port 9 and the exhaust passage of the exhaust pipe 8.

A partition member 19 is attached to the lower surface of the lower end portion 10 of the exhaust pipe 8 with bolts 1.
Fix it at 2. One partition wall member is a circular plate bent into a spherical shape, and the center part protrudes upward so that the bolt 12 can be fitted into it, and the diameter of the outer periphery is slightly smaller than the inner diameter facing the main body 1. It is. Therefore, a narrow annular space 20 is formed between the outer peripheral edge of the partition member 19 and the trap casing. A circulation hole 11 is opened near the center of the partition wall +J19. The size and number of circulation holes 11 are appropriately designed. In the illustrated example, four holes with a diameter of 2 mm are drilled. The circulation hole 11 may be formed along the axis of the mounting bolt 12.

A spherical float 13 is accommodated in the drain valve chamber 5 below the partition means 19. The float 13 rises and falls according to the water level of the drain to open and close the valve hole formed in the valve seat member 14. Drain is discharged to the drain port 15 through the valve hole. Reference numeral 18 indicates the float seat surface with which the float 13 contacts in the lowered position.

The fluid entering from the inlet 2 is swirled by the action of the swirl vanes 6. Due to the centrifugal force generated by the rotation, the water in the gas is shaken out and hits the inner wall of the trap casing.
It flows down the inner wall.

In turning g4, the pressure is higher on the outside and lower on the inside.
In the partition member 19, circulation occurs in which the fluid flows downward through the space 20 on the outer periphery and upward through the circulation hole 11. For this purpose, the drain of the circulation to 4 passes through the gap 20 and drains into the drain valve chamber 5.
be drawn into.

The dry gas in the center of the circulation tube 4 flows out through the suction port 9 to the outlet, and the drain in the drain valve chamber 5 is discharged to the drain port 5 by the action of the float valve.

Due to its downwardly curved shape, the partition wall member 19 functions to guide water adhering to its upper surface to the space 20, and
The lower surface serves as a support when the float 13 floats up.

[Brief explanation of drawings]

The drawing is a longitudinal sectional view of a drain trap according to the invention. 2: Entrance 3: Exit

Claims (1)

[Claims] (1) A partition member is arranged inside the casing with a narrow space between it and the inner circumferential wall of the trap casing, the drain valve chamber is isolated from the swirling chamber above it, and a circulation hole is provided near the center of the partition member. Drain trap with an open water separator.