JPH02186198A - Lever float type drain trap - Google Patents

Abstract

PURPOSE:To increase the valve opening force by installing a lever onto which a valve piece for opening/closing a valve port is installed, into a valve chamber, and by opening/closing the valve port by driving the level by the floating-up and lowering of a float arranged in the valve chamber and opening an inlet to the valve chamber so that the drainage stream supplied from the inlet flows in the valve opening direction toward a collision plate. CONSTITUTION:A hollow spherical float 16 made of a stainless steel thin plate is accommodated in free state into a valve chamber 3. Further, a lever 17 is installed onto a cover 2 by a pin 18 and hinge-joined. A valve body 19 for opening/closing a valve port 14 is installed onto the lever 17 by a snap ring 20. Further, a collision plate 12 is formed integrally with the lever 17, and the top edge of the collision body 21 extends into a passage 12 through a drain opened port 11. Thus, the float 16 floats up as the liquid level in the valve chamber 3 rises, and acts onto the lever 17, and said lever 17 turns in the valve opening direction, and the valve body 19 opens the valve port 14. Further, the drainage which flows in the passage 12 collides with the collision plate 21, and turns the lever 17 in the clockwise direction,and the valve body 19 easily opens the valve port 14.

Description

Detailed Description of the Invention Field of Industrial Application The present invention utilizes the difference in specific gravity between gas and liquid to drive a lever with a valve body attached to it with an open or closed float. This invention relates to a lever float type drain trap that automatically discharges drain generated during operation.

The above-mentioned drain traps are a steam trap that automatically discharges condensate generated in a steam piping system, and an air trap that automatically discharges condensed water generated in a compressed air piping system.

Steam and air gas, which have a low specific gravity, are located above the drain, which has a high specific gravity. The liquid level moves up and down in response to changes in the quantitative ratio of condensate and gas. 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. The lever float type drain trap takes advantage of these natural laws. Gas and drain are separated in the valve chamber, and the vertical movement of the float housed in the valve chamber drives the lever attached to the valve body. Drain is automatically discharged by opening and closing the valve port formed at the bottom.

Conventional technology A conventional lever float type drain trap has a float attached to one end of the lever, the other end of the lever is attached to the valve chamber as a fulcrum, and a valve body that opens and closes the valve opening is attached near the fulcrum. 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 the fulcrum near the valve body.

Problems to be Solved by the Present Invention Regarding the above-mentioned problems, in order to increase the discharge capacity,
In other words, in order to obtain a large valve opening force, it is necessary to increase the buoyancy force by increasing the float size, or to increase the expansion ratio of the buoyancy force acting on the valve body by lengthening the lever. There was a problem.

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 port communicating between the valve chamber and the outlet is formed at the bottom of the valve chamber, a lever with a valve body for opening and closing the valve port is installed inside the valve chamber, and the lever is driven by the rise and fall of a float placed inside the valve chamber. In the lever float type drain trap that opens and closes the valve port, a collision plate is formed on the lever, and the inlet is opened into the valve chamber so that the drain flow from the inlet flows toward the collision plate in the valve opening direction. , Monodeoru.

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

A float placed inside the valve chamber moves up and down along with the liquid level inside the valve chamber, and drives a lever to which a valve body is attached to open and close the valve port. Drain flowing in from the inlet hits the collision plate and applies a force in the direction of rotating the lever in the valve opening direction.

Therefore, the force due to the action of this drain flow and the buoyant force moving on the float act as the valve opening force, so even if the float of the same size and the lever of the same length are used, the valve opening force cannot be increased. Can be done.

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

As described above, according to the present invention, since the valve opening horn can be manually operated, a small float or a short lever can be used, and the drain trap can be made compact.

Furthermore, if a float or lever of the same size as the conventional one is used, it can be used at a location where a large differential pressure occurs, or the valve opening can be made larger to increase the discharge capacity.

Embodiment An embodiment illustrating a specific example of the above-mentioned technical means will be described (see FIG. 1).

A valve casing 2 having a valve chamber 3 therein is formed by fastening the valve 2 to the main body 1 with bolts (not shown).

A gasket 4 is interposed between the water body 1 and the lid 2 to keep them airtight.

An inlet 5 is formed in the upper part of the lid 2, and an outlet 6 is formed in the lower part. Lid 2
A vertical groove 7 is formed on the valve chamber 3 side. A blocking member 8 is attached to M2 with a screw, a gas opening 10 is provided at the upper end and a drain opening 11 is provided at the lower end, and the vertical groove 7 is closed to form a passage 12. Therefore, the inlet 6 communicates with the valve chamber 4 through the gas opening 10, the passage [2] and the drain opening 11.

The valve seat member 13 is screwed to the lower part of the valve seat member 13.
The valve chamber 3 and the outlet 6 are communicated through a valve port 14 formed in the valve opening 14 . The inlet 5 and the outlet 6 are opened horizontally, and each form a field thread for piping.

A gasket 15 maintains airtightness between the valve seat member 13 and M2.

A stainless steel & [hollow spherical float made of EI plate] 6 is accommodated in the valve chamber 3 in a free state. The flow (~) 6 floats on the drain accumulated in the valve chamber 3 and rises and falls with the liquid level.

Attach the lever 17 to the lever 2 with a pin 18 and connect it with a hinge. A valve body 19 for opening and closing the valve port 14 is attached to the lever 17 with a snap ring 20. Therefore, the lever 17 is
It can rotate using 8 as a fulcrum.

The lever 17 extends diagonally above the float 16 at an angle α from the vertical line, and its tip extends at an angle β from the vertical line.

A collision plate 21 is integrally formed with the lever 17. Collision plate 21
is formed in a substantially horizontal direction above the valve port 14, and its tip extends into the passage 12 through the drain opening 11.

A side wall 22 (left side in FIG. 1) of the valve chamber 3 extends in the vertical direction. Reference number @23 is a rib that guides the float 16 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 16.

Attach the bimetal 24 to the lid 2 with screws 25.

The bimetal 24 has a substantially zero-shaped shape and expands when the temperature is low, exerting the force that pushes up the lever 17 to open the valve, and narrows when the temperature is high, changing its shape so that it does not engage the lever 17.

The operation of the above drain trap is as follows.

The inlet 5 is connected to a drain generation point of steam-using equipment or the like.

Drain and steam flow into the valve chamber 3, and the drain is separated and accumulated in the lower part and the steam in the upper part. The float 16 rises as the liquid level within the valve chamber 3 rises and comes into contact with the lever 17 and the side wall 22.

When the liquid level further rises, the buoyant force of the float 16 increases, and the buoyant force acts on the lever 17 as a draft force. This force causes the lever 17 to rotate in the valve opening direction (clockwise in FIG. 1), causing the valve body 19 to open the valve port 14. Drain from the valve chamber 3 is discharged from the valve port 14 to the outlet 6. Since the drain passing through the passage 12 collides with the collision plate 21 and tries to rotate the lever 17 in the clockwise direction, the valve body 19 becomes easier to open the valve port 14. When the liquid level falls due to discharge, the float 16 descends, and as the float 16 descends, the lever 17 rotates in the valve closing direction (counterclockwise in FIG. 1), and the valve body 19 closes the valve port 14. , prevent steam from escaping. This kind of action is automatically rehearsed and performed.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the lever float type drain trap of the present invention. 1: Main body 2: Lid 3: Valve chamber 5: Inlet 6: Outlet 12: Passage 14: Valve port 16: Float 17: Lever 19: Valve body 21: Collision plate

Claims (1)

[Claims] 1. Form an inlet, a valve chamber, and an outlet with the valve casing, form a valve port that communicates the valve chamber and the outlet at the bottom of the valve chamber, and install a lever attached to a valve body to open and close the valve port inside the valve chamber. In the lever float type drain trap, which opens and closes the valve port by driving the lever by raising and lowering a float placed in the valve chamber, a collision plate is formed on the lever, and the drain flow from the inlet is directed toward the collision plate to open the valve. A lever float type drain trap with an inlet opening into the valve chamber so that water can flow in the same direction.