JPS61252995A - Bell float type trap - 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 means for preventing locking of vent holes in bell float type traps suitable for steam and gas.

<Prior art> As is well known, in bell float type traps, the drain valve is opened and closed based on the change in buoyancy due to air-water exchange between the gas phase inside the bell float and the condensate (drain) phase outside the bell float. However, since the vent hole located on the top surface of the bell float has a small diameter, even if the gas phase internal pressure is slightly higher than the water head pressure at the electric hole, the air leakage hole located on the top surface of the bell float will not contain oil such as lubricating oil for the compressor cylinder. There is a problem in that a locking phenomenon occurs in which water blocks the vent hole due to its viscosity, surface tension, etc., and the trap does not operate normally.

The oil-containing condensate (drain) is caused by the lubricating oil from the compressor used to compress the air mixed into the compressed air, which mixes with the moisture in the compressed air to form an emulsion, which reaches the trap with high viscosity. do.

<Purpose> The present invention was made to solve the above problems,
An object of the present invention is to provide a bell float type trap that can prevent the locking phenomenon in which oil-containing condensate blocks the vent hole due to its viscosity, surface tension, etc., and can extremely simplify the assembly work of the entire trap.

Accordingly, the present invention provides a gagging prevention means in the air vent hole of the bell float, and the preventing means is constituted by a floating piece that is freely fitted only into the air vent hole so as to project upward and downward from the air vent hole. The main part of the floating piece is a bell float type trap, which is characterized in that it is made of a material having a specific gravity equivalent to that of water so that it can float even when there is a slight flow of air or water.

Therefore, according to the present invention, the floating piece that is freely fitted into the vent hole moves freely not only when the bell float goes up and down, but also when there is a slight flow of air water such as escaped air bubbles, so that condensate does not flow into the vent hole. It won't stick.

In this way, the locking phenomenon in which condensed water mixed with oil such as lubricating oil for the compressor cylinder blocks the vent hole due to its viscosity, surface tension, etc. is prevented, and the floating piece is
Since it is simply fitted into the vent hole of the single bell float, the assembly work is extremely simple, and the floating piece can be manufactured at low cost.

<Example> Examples will be described below based on the drawings.

First, the first embodiment shown in FIG. 1.2 will be described. 1 is a trap casing, 2 is a cover thereof, 3.4 is an inlet and an outlet, respectively, and the inlet 3 is arranged upwardly at the bottom of the casing 1. It communicates with the opened nozzle 5 and installs 1 m of h7T2-) 7 at the nozzle 5 in the condensate storage chamber 6. An air escape hole 8 is bored in the upper surface of the bell float 7, and a locking prevention means A1 is provided in the air escape hole.

Note that the bell float 7 undergoes air and water exchange inside and outside through the vent hole 8, loses its buoyancy due to a decrease in the internal gas phase, and reaches the sinking position shown by the chain line. The buoyancy is restored by the increase in the volume of the gas phase a inside the bell float 7 due to evaporated steam or directly flowing steam or air, and the floating position is reached as shown by the solid line. 9 is a drain valve, which is connected to the drain hole 11 of the valve seat 10 at the floating position of the bell float 7.
The bell float 7 is connected to the bell float 7 via a lever 12 so as to close the drain hole 11 of the valve seat 10 when the bell 70 is in the lowered position. Reference numeral 13 designates a pin that pivotally connects the base end of the lever 12 to the inner surface of the cover 2.

Further, in this example, the locking prevention means A1 is composed of a floating piece E that is freely fitted into the vent hole 8, and the floating piece E is used not only when the bell float 7 is raised and lowered, but also when the bell float 7 is raised and lowered. Figure 2 (a)
It is made of thin and light plastic with a specific gravity equivalent to that of water, and is shaped like a large-diameter tube at the upper and lower ends, with a star-shaped cross section and a vertical dividing line F.

Therefore, the floating piece E can be easily assembled into the vent hole 8 by elastically deforming the lower end and folding it into a small size as shown in FIG. 2(b).

With the above configuration, when the bell float is raised and lowered, etc., the floating piece E moves freely, and the condensate that sticks to or is about to stick to the vent hole is broken, so that the vent hole is not blocked.

FIG. 3 shows a second embodiment, and similarly to the first embodiment, this locking prevention means A2 is composed of a floating piece G fitted in the vent hole 8 in a freely movable manner. The floating piece G is made of plastic with the same specific gravity as water and has a coiled shape with bent upper and lower ends so that it can move freely even with a slight flow of air and water.If the lower end is elastically deformed, it can be easily attached to the air vent 8. I am making it possible to incorporate it.

In the first and second embodiments as described above, the floating pieces E and G move not only when the bell float 7 rises and falls, but also when there is a slight flow of air water, so that condensate does not stick to the vent hole 8. is prevented.

<Effects> As is clear from the description of the embodiments above, according to the present invention, 1. The floating piece, which is freely fitted into the vent hole, moves not only when the bell float is raised and lowered, but also when there is a slight flow of air such as bubbles, so condensate does not stick to the vent hole. In this way, the locking phenomenon in which condensed water mixed with oil such as compressor sill lubricating oil blocks the vent hole due to its viscosity and surface tension is prevented. Since it only needs to be fitted into the vent hole, the assembly work is extremely simple, and the floating piece can be manufactured at low cost.

[Brief explanation of drawings]

FIG. 1 is a vertical sectional view showing a first embodiment of the present invention, and FIG. 2 (
, ) is a perspective view of the main part of the first embodiment, FIG. 2(b) is a perspective view of the floating piece when assembled, and FIG. 3 is a perspective view of the main part of the second embodiment. 6: Condensate storage chamber, 7: Bell float, 8: Missing hole, AI,
A2: Locking prevention means, E, G: Floating piece, F: Vertical dividing line.

Claims (1)

[Claims] A locking prevention means is provided in the air vent hole of the bell float, and the preventing means is composed of a floating piece that is freely fitted only in the air vent hole so as to project upward and downward from the air vent hole,
A bell float type trap characterized in that the floating piece is made of a material having a specific gravity equivalent to that of water so that it can float even when there is a slight flow of air or water.