JPS6350600B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a free-float type trap in which a valve port is directly opened and closed by a float disposed freely within a valve chamber.

Conventionally, there is a trap that has a valve opening facing upward at the bottom of the valve chamber, and opens and closes the valve opening directly at the lower end of a float placed inside the valve chamber. This trap is difficult to install, and if it is installed at an angle, the float will hit the valve seat unevenly, resulting in valve closing failure and fluid leakage. That is, in FIG. 3, it is assumed that the trap is installed at an angle, and the central axis 2 of the valve port 1 is inclined by an angle θ with respect to the vertical axis 4 passing through the spherical center of the float 3. At this time, the buoyant force of the float 3 acts on the shaft 4, and the force consisting of the fluid pressure acting on the valve port 1, ie, the valve closing force, acts on the shaft 2. This is because the float 3 receives a clockwise rotational moment about point A due to the discrepancy in the axes of action of the buoyant force and the valve closing force. However, in gas systems where this type of trap is installed, the valve opening is made small in consideration of pressure fluctuations.
Under normal pressure conditions, the valve-closing force acting on the valve port is small, and it is impossible to prevent the float from closing incompletely due to the above-mentioned moment.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a free-float type trap that can be completely closed even when installed at an angle, and will not leak fluid.

Next, the present invention will be explained based on the embodiment shown in FIG. The trap housing is formed of a main body 5 and a lid 8 fixed to the main body 5 with a bolt 7 via a gasket 6. A valve chamber 9 is provided within the housing, and an inlet passage 10 and a pressure equalization passage 11 are opened on the same axis at the upper part of the valve chamber 9. In addition, a valve port 1 is provided at the bottom of the valve chamber 9.
2 is provided, and the valve chamber 9 is communicated with the outlet passage 13 through the valve port 12. The valve port 12 is formed by a valve seat member 14 made of a material such as rubber or synthetic resin. A ring-shaped permanent magnet 15 is arranged around the outer periphery of the valve seat member 14, and is fixed to the holding member 17 together with the valve seat member 14 by a snap ring 16. Holding member 17
is screwed onto the bottom wall of the valve chamber 9 via a gasket 18. A hollow spherical float 20 formed of a spherical shell 19 made of a non-magnetic material is disposed in the valve chamber 9 in a free state. The inner surface of the float 20 is also formed into a spherical shape, and a ball 21 made of a paramagnetic material such as steel is arranged in a free state inside the float 20. A plurality of protrusions 22 are provided on the side wall of the valve chamber 9 to restrict the range of lateral movement of the float 20.

The operation of the above embodiment will be explained. The inlet passage 10 is connected to the gas system where condensate occurs, and the pressure equalization passage 11 is similarly connected to the gas system to facilitate the flow of condensate into the valve chamber 9. The float 20 floats in the condensate in the valve chamber 9, and when in a floating state, it leaves the valve seat member 14, opens the valve port 12, and discharges the condensate in the valve chamber 9 to the outlet passage 13 side. When the condensate in the valve chamber 9 disappears, the float 20 descends, seats on the valve seat member 14, and closes the valve port 1.
2 to stop condensate discharge.

As shown in FIG. 2, when the trap is installed at an angle and the float 20 comes into contact with point B of the valve seat member 14, the ball 21 rolls to the position shown at 21' by the magnetic force of the magnet 15. . and,
The float 20 is located on the central axis of the magnet 15, and due to the movement of the center of gravity and the magnetic coupling force between the magnet 15 and the ball 21, the float 20 is kept closed against the rotational moment. Therefore, the valve is reliably closed and no fluid leaks. In particular, the trap of this embodiment is advantageous when discharging liquid such as condensate generated in an explosive gas system such as hydrogen gas, and prevents the dangerous gas from leaking to the exit side, thereby increasing safety. can be improved. The float 20 is made of a non-magnetic material, has a spherical interior, and has a ball 2.
Since the ball 1 is also spherical, the ball 21 can smoothly roll without resistance to a predetermined position where it attracts the magnet 15, that is, a position on the central axis of the valve port 12. Also, ball 2
Even if a magnet is used for 1 and a paramagnetic material such as steel is used for the portion on the valve seat side, the ball 21 can similarly roll and be moved to a predetermined position. Furthermore, if the inside of the valve seat member 14 is filled with a magnetic material, the distance to the ball 21 can be shortened and the magnetic coupling force can be increased, eliminating the need to use a separate magnet.

Thus, the present invention can provide a free-floating trap that can be completely closed even when installed at an angle, and will not leak fluid.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a free-floating trap according to an embodiment of the present invention, Fig. 2 is a sectional view showing the operating state of the main parts of the above embodiment, and Fig. 3 is a sectional view of the main parts of a conventional trap in its operating state. It is a figure showing a state. 5: Main body, 8: Lid, 9: Valve chamber, 10: Inlet passage, 15: Valve port, 13: Outlet passage, 14: Valve seat member, 15: Magnet, 17: Holding member, 20: Float, 21: Ball .

Claims (1)

[Claims] 1. A trap housing that forms a valve chamber with an inlet passage and an outlet passage communicating through the valve port, a spherical float formed of a non-magnetic spherical shell and placed freely within the valve chamber, and an opening on the valve chamber side of the valve port. A free float type trap comprising a valve seat with which a float directly contacts, and a ball disposed in a free state within the float, and characterized in that the valve seat side and the ball are made of a material that magnetically attracts each other.