JPS6128877B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a bucket-type steam trap in which a downward-opening bucket float is accommodated in a free state in a valve chamber, and a valve port is directly opened and closed by a sealing surface provided on the outer surface of the float. Regarding.

In such a device, since the valve body (sealing surface) and the float are integrally constructed, when the float is displaced, the sealing surface is immediately displaced and the valve opening is opened and closed. Therefore, condensate and steam flow in from the inlet, changing the amount of gas inside the float, changing the buoyant force acting on the float, and displacing the float. This steam trap reacts and operates extremely sensitively. However, when condensate continuously flows in small amounts, the sealing surface of the float does not move away from the valve port sufficiently even when the valve is opened, and the valve port repeatedly opens wide and closes in a half-open state. . Such opening/closing operations are undesirable as condensate is discharged profusely and may be mistaken for leakage. Moreover, such an operation not only accelerates the wear of the valve seat, etc., but also causes the float to get caught on the protruding valve seat, the wall of the valve chamber, etc. during rocking.

Therefore, the object of the present invention is to completely separate the float from the valve seat each time the valve is opened, fully opening the valve port, and to perform water drainage with good precision, reducing wear on the valve seat, etc., and ensuring reliable opening/closing operation. It is an object of the present invention to provide a bucket-type steam trap in which a downward-opening bucket float is accommodated in a free state in a valve chamber.

Next, a detailed explanation will be given based on the illustrated embodiment. A lid 3 is attached to the main body 1 with bolts 4 via a gasket 2 for airtightness, and a valve chamber 5 is formed. A side inlet 6 of the main body 1 communicates with the valve chamber 5 through an inlet passage 7 extending below the valve chamber 5 and an inlet pipe 8 screwed vertically into the bottom wall of the valve chamber 5. A downward-opening bucket float 9 is accommodated in the valve chamber 5 in a free state around the introduction pipe 8. The float 9 has a substantially cylindrical shape, and its upper end wall has an annular seal portion 10 on the outer periphery and a flat upper surface, and a recess 11 in the center. The recess 11 has a cylindrical portion 12 continuous from the inner circumferential end of the annular seal portion 10 and a bottom wall portion 13 inclined downward toward the center. 14 is an air vent.
A porous plate 15 is attached to the recess 11 to form a plow chamber 16, in which a spherical plow 17 is accommodated in a free state. A cap 18 that also serves as a plow is attached to the lower end of the float 9. The valve seat member 19 is screwed onto the lid 3 via an airtight gasket 20, and the valve seat at the tip forming the valve port 21 projects downward from the ceiling of the valve chamber 5. Valve port 21 is outlet 2
It is connected to 2. A float seat 23 is formed so as to be located on the same plane as the lower end surface of the valve seat. A side wall 24 of the valve chamber 5 where the valve port 21 is located is formed obliquely downward from the vicinity of the valve port 21.

Next, the operation of the above trap will be explained. Entrance 6
When steam is supplied into the float 9 through the inlet passage 7 and the inlet pipe 8, condensation and vent holes 1 occur.
Despite the escape from the valve chamber 5, there is sufficient steam in the float 9, and the float 19 receives sufficient buoyancy and floats in the condensate water in the valve chamber 5, so that the sealing surface 10 touches the valve seat as shown in the figure. The valve port 21 is closed in contact with the valve port 21. At this time, the other point of the sealing surface 10 is in contact with the float seat 23, the float 9 is in the attitude shown in the figure, and the plow 17 is in the center of the bottom wall 13 of the plow chamber 16. After this state continues, when condensate flows into the inlet 6, the supply of steam to the float 9 is cut off, and the float 9 gradually loses its buoyancy as the amount of steam inside decreases. Therefore, the float 9 rotates in a counterclockwise direction with the sealing surface 10 in contact with one point (the left end in the figure) of the valve seat. Then, the spherical peg 17 located at the center of the bottom wall of the plow chamber 16 will move in the direction away from the valve port 21 (to the left in the figure).
Roll to. This rapidly increases the rotational moment in the valve opening direction acting on the float 9, and the rotational movement of the float 9 in the rotational direction is accelerated.
Float 9 finally completely separates from the valve seat and moves to valve port 2.
Fully open 1. Condensate flowing into the valve chamber 5 from the inlet 6 passes through the valve port 21 and is discharged to the outlet 22. Following such discharge, when steam flows in from the inlet 6 again, unlike condensate, it accumulates in the float 9 and exerts a buoyant force on the float 9, so that the float 9 rises as described above and closes the valve. Close mouth 21. By repeating this operation, only the condensate is automatically discharged.

As is clear from the above description, in the present invention,
The float has a plow chamber, and the spherical plow placed in the plow chamber rolls as the float rotates when the valve is opened, rapidly increasing the rotational moment in the direction of opening the valve. Each time, the float completely leaves the valve seat and fully opens the valve port. Therefore, the valve opens and closes crisply, and opens and closes less frequently, reducing wear on the valve seat, etc., and the float does not remain in a tilted, half-open position, so there is no need to worry about the protruding valve seat or valve chamber. It will not get caught on walls etc.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view of a bucket-shaped steam trap according to an embodiment of the present invention. 5...Valve chamber, 6...Inlet, 8...Introduction pipe, 9...
...Downward opening bucket float, 10...Seal surface, 13...Bottom wall of plow chamber 16, 14...Air vent, 17...Plow, 21...Valve port, 22...Outlet.

Claims (1)

[Claims] 1 A downward-opening bucket float is housed freely in a valve chamber, and the valve port is opened and closed by a sealing surface provided on its outer surface, and the bottom wall tilts downward toward the center. A bucket-shaped steam trap characterized in that a plowing chamber with a plowing chamber is provided on a float, and a spherical plowing chamber is freely accommodated in the plowing chamber.