JP2802467B2 - Float valve - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a float valve for opening and closing a valve port on the outer surface of a float, and more particularly to a valve capable of securely closing the valve port when the valve port is closed. Float valves are used as steam traps for discharging condensed water generated by condensation of steam in the steam piping system, and air traps for discharging condensed water generated in the compressed air piping system. .

[0002]

2. Description of the Related Art A conventional float valve is disclosed, for example, in Japanese Utility Model Publication No. 63-12318. In this method, the float is placed in the valve chamber in a free state, and the valve port is opened and closed on the outer surface of the float, so that two float seats are formed on the valve chamber wall in parallel with the valve port axis. It was done. By forming the two float seats, when the float is displaced and seated on the float seat to close the valve port, the valve can be reliably closed.

[0003]

The conventional float valve described above has a problem that the valve port cannot be reliably closed on the outer surface of the float, particularly when the pressure difference between the front and rear of the valve port is large. there were. This is because if the pressure difference around the valve port is large,
When the float is displaced and approaches the float seat and the valve port, the float is sucked by the pressure difference to the valve port side. When the seat cannot be seated, the seat is seated on the valve port and one of the float seats, and cannot be seated on the other float seat, and the float is out of the original closed position. Therefore, it becomes impossible to securely close the valve port.

Accordingly, a technical problem of the present invention is that even if the pressure difference before and after the valve port is large, the valve port can be reliably closed without the float deviating from the original closing position. It is to get a valve.

[0005]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is to form an inlet, a valve chamber and an outlet by valve casing, and connect the valve chamber and the outlet. A valve opening for opening and closing the valve opening on the outer surface of the float and a float seat provided in the valve chamber;
A plurality of spherical magnetic bodies are arranged in a free state so as to repel each other in the same.

[0006]

The operation of the above technical means is as follows.
By arranging a plurality of spherical magnetic bodies in the float in a free state so as to repel each other, when the float is displaced and approaches the float seat and the valve port, the float is swung. The spherical magnetic body is displaced in the float according to the movement. Spherical magnetic material has a flow due to the repulsion of each magnetic force.
The center of gravity of the float also changes in accordance with the combined displacement of the displacement in accordance with the swing of the float and the displacement of the repulsive magnetic force. Even if the outer surface of the float is sucked into the valve port and seated on only one of the float seats, the float changes the center of gravity of the float, so that the float is connected to the valve port and one of the float seats. It is possible to return to the original closed position of the float while sitting on the other float seat while sitting, and the valve port can be reliably closed.

[0007]

An embodiment showing a specific example of the above technical means will be described (see FIG. 1). This embodiment shows an example of a float type steam trap using a hollow float. The body 1, 2 and the inner wall 3 are combined by welding, respectively,
The inlet member 5 and the outlet member 6 are similarly attached to the main bodies 1 and 2 by welding to constitute a valve casing.
The inlet member 5 and the outlet member 6 have internal thread portions 7 for pipe connection,
8 is formed. The valve chamber 4 communicates with a steam piping system (not shown) by a female screw portion 7. The valve seat 9 is attached to the inner wall 3 below the valve chamber 4. The valve seat 9 is provided with a penetrating valve port 10 to communicate the valve chamber 4 with the female screw portion 8 on the outlet side. A hollow float 11 is arranged in the valve chamber 4 in a free state. The outer surface of the float 11 contacts the end of the valve port 10. Two spherical magnetic bodies 12, 13 are arranged in a free state in a hollow portion in a float 11. The spherical magnetic bodies 12 and 13 are magnetized so as to repel each other so that a gap 14 is formed between the two sides as shown in a free position in FIG. At the lower part of the float 11, a float seat 15 is attached in parallel with the axis of the valve port 10. The float seat 15 shown in the figure is located at the back of the paper float 11, and although not shown, a similar float seat is provided in front of the paper float 11 to provide two float seats. I do.
Therefore, when the float 11 is located at the lowermost position as shown in FIG. 1, the outer surface of the float 11 is supported at a total of three points including the end of the valve port 10 and the two float seats. The Rukoto. Reference numeral 20 denotes a porous screen for capturing foreign matter in the fluid flowing into the valve chamber 4.

In this embodiment, two spherical magnetic bodies 1
Although an example is shown in which 2, 13 are arranged, the number of spherical magnetic bodies may be not limited to two, but may be three or four.

Next, the operation will be described. A mixed fluid of condensate and steam generated in a steam piping system (not shown) flows into the valve chamber 4 from the female screw portion 7 on the inlet side. When the condensed water accumulates in the valve chamber 4, the float 11 is lifted by its buoyancy to open the valve port 10, and the condensed water is discharged out of the system via the female screw portion 8 on the outlet side. When the condensate in the valve chamber 4 is discharged, the float 11 descends to close the valve port 10 and the two float seats 15.
Thus, the steam is prevented from being discharged to the outlet side.

When the float 11 descends from the floating position to the valve port 10 and the float seat 15, the water surface in the valve chamber 4 becomes wavy due to the condensed water flowing in, and the float 1 is floated.
1 also swings accordingly. When the float 11 swings, the spherical magnetic bodies 2 and 13 inside are similarly displaced, and are further irregularly displaced by the repulsive force of the spherical magnetic bodies 12 and 13. The pressure difference between the inlet side and the outlet side is large,
When the pressure difference between the front and rear is large, when the float 11 descends, the float 11 is sucked toward the valve port 10 according to the pressure difference. Also in this case, the float 11 swings and the spherical magnetic bodies 12 and 13 inside are displaced. Float 11
Float seat 15 and valve port 10 of one of the two float seats
Even if it is not the original sitting position,
The spherical magnetic bodies 12 and 13 are displaced to change the position of the center of gravity of the float 11, that is, the spherical magnetic bodies 12 and 13 are displaced.
Is displaced toward the front of the paper float 11, the float 1
1 can be seated on both of the two float seats and return to the original seating position, and the valve port 10 can be securely closed.

[0011]

The present invention has the following specific effects. According to the present invention as described above, the spherical magnetic body in the float is displaced in accordance with the displacement of the float, and the center of gravity of the float is changed. Can return to another seating position, that is, the original seating position of the float, and the valve port can be reliably closed.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of a float valve of the present invention.

[Explanation of symbols]

 1, 2 Main body 3 Inner wall 4 Valve chamber 5 Inlet member 6 Outlet member 9 Valve seat 10 Valve port 11 Float 12, 13 Spherical magnetic body 14 Gap 15 Float seat

Claims (1)

(57) [Claims] An inlet, a valve chamber, and an outlet are formed by valve casing, a valve port communicating the valve chamber with the outlet is provided, and the valve port is opened and closed on an outer surface of the float, and the valve is opened and closed. A float valve in which a seat is provided in a valve chamber, wherein a plurality of spherical magnetic bodies are freely disposed in the float to repel each other.