JPH02134498A - Float valve - Google Patents

Abstract

PURPOSE:To enlarge the valve opening force by installing a lever to a valve chest in inclination at an acute angle to the displacement of a float in the direction of valve opening, and by providing this lever with a collision plate to receive the force in the direction of valve opening given by the exhausted fluid which should collide with it. CONSTITUTION:Condensate and vapor flow into a valve chest 4 and are separated there, and the former will stagnate in its lower part and the latter in the upper part. A float 11 rises with rising of the liquid level in the valve chest 4 to come in contact with a lever 13 and side wall 16, and a further rise of the liquid level enlarges the float 11 buoyancy, which acts on the lever 13 as a wedge force to rotate it in the direction of valve opening, which causes a valve body 15 to open a valve hole 9. The condensate in the valve chest 4 is exhausted to an outlet 7 from the valve hole 9. The exhausted condensate collides with the oversurface of a collision plate 22 with a motive to rotate the lever 13 in the direction of valve opening, and the valve body 15 is easier to open the valve hole 9. Water exhaustion sinks the float 11 together with the liquid level, which rotates the lever 13 in the direction of valve closing, and the valve body 15 blocks the valve hole 9 to prevent flow of vapor. These motions shall be repeated.

Description

Detailed Description of the Invention: Industrial Application Field The present invention utilizes the difference in specific gravity between a gas and a liquid to drive a valve means with an open or closed float to automatically drain one fluid from a gas-liquid mixing system. Regarding the structure of a float valve for discharging.

The float valve is used to selectively and automatically discharge either gas or liquid from a system in which gas and liquid coexist. Steam traps that automatically discharge condensate generated in steam piping systems, Tama-art traps that automatically discharge condensed water generated in compressed air piping systems, and air traps that automatically discharge air mixed in water piping systems. Vent etc.

The gas with lower specific gravity is located above the liquid with higher specific gravity. The liquid level rises and falls according to changes in the quantity of liquid and gas.
Jvru. The float floats on the liquid surface due to the balance between the buoyant force acting on it and its own weight, and moves up and down with the liquid surface. Float valves take advantage of these natural laws, separating gas and liquid in the valve chamber, placing the valve port at the top or bottom of the valve chamber,
The vertical movement of a float housed in the valve chamber drives the valve means to open and close the valve port, thereby selectively and automatically discharging one of the fluids.

Conventional technology A conventional float valve uses a float to drive the valve means to open and close the valve port.A float is attached to one end of the lever, the other end of the lever is attached to the valve chamber as a fulcrum, and the valve opening is opened and closed near the fulcrum. It is equipped with a valve body. Alternatively, a float is attached to one end of the lever, a valve body for opening and closing the valve port is attached to the other end of the lever, and the valve body is attached to the valve chamber using a fulcrum near the valve body.

Problems to be Solved by the Present Invention Regarding the above-mentioned problems, in order to greatly increase the discharge capacity (1),
In other words, in order to obtain a large valve opening force, the float must be made larger to increase the buoyancy and dead weight, and the lever must be lengthened to increase the buoyant force and dead weight acting on the valve body. There was a problem that was getting bigger.

Therefore, the technical problem of the present invention is to make it possible to obtain a large valve opening force without increasing the size of the float or lengthening the lever.

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problems is to form an inlet, a valve chamber, and an outlet with a valve casing,
A valve opening that communicates the valve chamber with the outlet is formed, a float is arranged in a free form Qi in the valve chamber, and a lever with a valve body that opens and closes the valve opening is set at an acute angle with respect to the displacement of the float in the valve opening direction. The lever is equipped with a collision plate that is attached to the valve chamber at an angle and receives a force in the direction of opening the valve when discharged fluid collides with it.

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

The float, which is placed in a free state within the valve chamber, is displaced up and down along with the liquid level within the valve chamber. The float, which floats or descends and is displaced in the valve opening direction, comes into contact with the lever. ) Since the lever is inclined at an acute angle with respect to the displacement of the r-coat in the valve opening direction, the buoyancy of the float or its own weight acts as a test force on the lever.

Therefore, even if a float of the same size and a lever of the same length are used, the valve opening force can be increased.

Effect of the invention The present invention produces the following unique effects.

When the valve is opened, the fluid discharged from the valve port to the outlet flows at high speed between the valve body and the valve port, and tries to force the valve body into the valve port. Since the discharged fluid collides with the collision plate and tries to rotate the lever in the valve opening direction, the lever becomes easier to rotate in the valve opening direction and the valve opening force can be increased.

Embodiment An embodiment illustrating a specific example of the above technical means will be described (see FIGS. 1 and 2).

This embodiment is applied to a closed float type steam trap.

The bolts 1 and 2 are fastened with bolts (not shown) to form a valve nosing having a valve chamber 4 inside.

A casquera (5) is interposed between the main body and the lid 2 to maintain airtightness between the two.

An entrance 6 is formed in the upper part of the festival 2, and an exit lower part is formed in the lower part. The inlet 6 communicates with the upper part of the valve chamber 4 and is connected to steam-using equipment (not shown).
etc. to introduce condensate into the valve chamber 4. A valve seat member 8 is screwed to the lower part of the valve seat 2, and the valve chamber 4 is communicated with the outlet lower 8 through a valve port 98 formed in the valve seat member 8, so that condensate in the valve chamber 4 is guided to the outlet lower.

The inlet 6 and the outlet lower are opened in the horizontal direction, and each form a female thread for piping. Airtightness between the valve seat member 8 and the lid 2 is maintained by a gasket 10.

A hollow spherical float 11 made of a thin stainless steel plate is housed in a valve chamber 4 in a free state. The float 11 floats on the condensate accumulated in the valve chamber 4 and rises and falls with the liquid level.

A lever 13 is attached to the lid 2 with a pin 14 for hinge connection. A valve body 5 for opening and closing the valve port 9 is attached to the lever 13 with a snap ring 21. Therefore, the lever 13
It can be rotated using the fulcrum.

A lever 13 (which extends diagonally above the float 11 at an angle α from the vertical line, and whose tip extends diagonally above the float 11 at an angle β from the vertical line. A collision plate 22 is integrally formed with the lever 13. Collision plate 2
2 is formed near the upper part of the valve port 9 in a substantially horizontal direction.

A side wall 16 (left side in FIG. 1) of the valve chamber 4 extends vertically. Reference numeral 17 is a rib that guides the float 11 in the vertical direction, and is formed at two locations in total, one on the front side of the page, and a slight gap is formed between it and the float 11.

Attach bimetal 18 to lid 2 with 1 screw.

The bimetal 18 has a substantially zero-shaped shape and expands when the temperature is low, exerting the force that pushes up the lever 13 to open the valve, and narrows when the temperature is high, changing its shape so that it does not engage the lever 13.

The operation of the above steam trap is as follows.

The inlet 6 is connected to a point where condensate is generated, such as in steam-using equipment. Condensate and steam flow into the valve chamber 4, and the condensate is separated into steam in the lower part and steam in the upper part. The float 11 rises as the liquid level within the valve chamber 4 rises and comes into contact with the lever 13 and the side wall 16. When the liquid level further rises, the buoyancy of the float increases, and the buoyancy acts on the lever 13 as a wedge force. This wedge force causes the lever 13 to rotate in the valve closing direction (clockwise in FIG. 1), causing the valve body 15 to open the valve port 9. Condensate in the valve chamber 4 is discharged from the valve port 9 to the outlet lower. The discharged condensate that reaches the valve port 9 passes through the collision plate 2.
2 and tries to rotate the lever 13 clockwise, the valve body 15 becomes easier to open the valve port 9.

When the liquid level falls due to discharge, the float 11 descends, and as the float 13 descends, the lever 13 rotates in the valve closing direction (counterclockwise in FIG. 1), and the valve body 15 closes the valve port 9. , prevent steam from escaping. This kind of operation is automatically repeated.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a sealed float type steam trap according to an embodiment of the float valve of the present invention, and FIG. 2 is a perspective view of the lever shown in FIG. 1. 1: Main body 2: Vessel 4: f'i' chamber 6 Two-man lower: Outlet 9: Valve port 11: Float 13 Nilever 15: Valve body 22: Collision plate

Claims (1)

[Claims] 1. A lever with a valve casing that forms an inlet, a valve chamber, and an outlet, a valve port that communicates the valve chamber and the outlet, a float placed in the valve chamber in a free state, and a valve body that opens and closes the valve port. is attached to the valve chamber at an acute angle with respect to the displacement of the float in the valve opening direction, and the lever is formed with a collision plate that receives the force in the valve opening direction when discharged fluid collides with it.