JP5607489B2 - Float type steam trap - Google Patents

Description

The present invention relates to a float-type steam trap that automatically discharges condensate as condensate of steam generated in a steam piping system of a steam transport pipe, steam-using equipment, etc., by floating up and down of the float. The present invention relates to an apparatus capable of preventing erosion of an exit passage by a flow.

A conventional float steam trap is disclosed in, for example, Patent Document 1. This is a trap casing in which a trap casing having an inlet and an outlet forms a trap chamber communicating with the inlet and an outlet passage communicating with the outlet, and a cylindrical valve seat provided with a drain valve hole communicating the trap chamber with the outlet passage side. A float that opens and closes the trap chamber side end of the drain valve hole according to the liquid level of the trap chamber is accommodated in the trap chamber, and the outlet passage side end of the drain valve hole is provided in a cylindrical valve seat. It is formed by a small diameter hole, and the total opening area of the plurality of small diameter holes is formed larger than the opening area at the trap chamber side end of the drain valve hole.

2-81997

The conventional float type steam trap prevents erosion of the outlet passage by dispersing the discharged fluid through the plurality of small diameter holes of the cylindrical valve seat and flowing down to the outlet passage. However, the dispersion capacity was relatively low, leaving room for improvement.

Therefore, the problem to be solved by the present invention is to provide a float type steam trap that can reliably prevent the erosion of the outlet passage.

The present invention traps a cylindrical valve seat having a trap casing having an inlet and an outlet, a trap chamber communicating with the inlet, an outlet passage communicating with the outlet, and a drain valve hole communicating the trap chamber with the outlet passage. A plurality of floats that are attached to the lower part of the chamber and accommodate a float that opens and closes the trap chamber side end of the drain valve hole according to the liquid level of the trap chamber, and the outlet passage side end of the drain valve hole is provided in the cylindrical valve seat In this case, the outlet passage is inclined to the outlet side.

According to the present invention, the outlet passage is inclined toward the outlet side, so that the fluid (condensate) discharged from the plurality of small diameter holes of the cylindrical valve seat directly collides with the wall surface of the outlet passage. It is possible to reduce the probability of the erosion and prevent the erosion of the exit passage more reliably.

It is sectional drawing of the float type steam trap concerning embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIG. This embodiment is applied to a free float type steam trap. The lid member 2 is fastened to the cast body 1 with a bolt (not shown) to form a trap casing. The inside of the trap casing is separated by a trap chamber 4 that communicates with the inlet 5 and an outlet passage 6 that communicates with the outlet 7. The inlet 5 and the outlet 7 are formed on the same axis.

A cylindrical valve seat 3 having a tip projecting into the trap chamber 4 through the bottom of the outlet passage 6 from the right bottom wall opening of the main body 1 is screwed to the main body 1. The cylindrical valve seat 3 has a drain valve hole 10 at the center in the axial direction, and is formed by a plurality of small diameter holes 8 provided on the peripheral wall of the drain valve hole 10 on the outlet passage 6 side end.

The outlet passage 6 above the small-diameter hole 8 is disposed to be inclined toward the outlet 7 side. It arrange | positions so that the center axis direction of the small diameter hole 8 and the center axis direction of the exit channel | path 6 may become substantially parallel.

A hollow spherical stainless steel float 13 is placed in the trap chamber 4 in a free state. The float 13 rises and falls according to the liquid level in the trap chamber 4, and opens and closes the drain valve hole 10 on its outer surface. A float seat 14 is formed on the bottom wall of the main body 1. The float seat 14 holds the float 13 at a position where the float 13 closes the drain valve hole 10.

The operation of the above free float type steam trap is as follows. Steam and condensate flow into the trap chamber 4 from the inlet 5, and the steam separates and accumulates in the upper part and condensate in the lower part. When the liquid level in the trap chamber 4 rises, the float 13 rises and opens the drain valve hole 10, and condensate in the trap chamber 4 passes from the drain valve hole 10 to the outlet 7 through the plurality of small diameter holes 8 and the outlet passage 6. Discharge.

The condensate discharged is dispersed by the plurality of small-diameter holes 8 and the central axis of the small-diameter holes 8 and the central axis of the outlet passage 6 are substantially parallel. The probability of directly colliding with the inner peripheral wall surface of the outlet passage 6 can be reduced, and erosion of the inner peripheral wall surface of the outlet passage 6 can be reliably prevented. When the liquid level in the trap chamber 4 decreases due to the discharge of condensate, the float 13 descends and directly closes the drain valve hole 10 on the outer surface.

  INDUSTRIAL APPLICATION This invention can be utilized for the float type steam trap which discharges automatically the condensate which generate | occur | produces in steam piping systems, such as a steam transport pipe and a steam using apparatus, by the float fall of a float.

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid member 3 Cylindrical valve seat 4 Trap chamber 5 Inlet 6 Outlet passage 7 Outlet 8 Small diameter hole 10 Drain valve hole 13 Float

Claims (1)

A trap casing having an inlet and an outlet, to form an outlet passage communicating with the outlet and trap chamber communicating with the inlet,
Mounting a cylindrical valve seat having a drain valve hole communicating with the trap chamber into the outlet passage side at the bottom of the trap chamber,
The float for opening and closing the trap chamber-side end of the drainage valve hole is accommodated in said trap chamber in accordance with the liquid level of the trap chamber,
In the outlet passage-side end of the discharge valve hole that is formed by a plurality of small-diameter holes provided in the cylindrical valve seat,
It said outlet passage is arranged to be inclined to the outlet side,
A float type steam trap , wherein a central axis of the plurality of small diameter holes and a central axis of the outlet passage are substantially parallel .