JP2004019746A - Float type drain trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a float type drain trap where a float and a valve can be simultaneously seated at upper and lower valve ports, respectively. <P>SOLUTION: An inlet 4, a valve chest 3, and an outlet 11 are formed by a casing comprising a body 1, a lid body 2, and a seat member 9. The upper and lower valve ports 12, 13 on the same upper and lower shafts for allowing the valve chest 3 to communicate with the outlet 11 are provided in the seat member 9. The float 14 for opening and closing the upper valve port 12 is arranged in the upper valve chest 3 of the upper valve port 12, and a valve element 15 for opening and closing the lower valve port 13 is arranged at the side of the upper outlet 11 of the lower valve port 13. The upper end face of an upper guide rod 16 comes into contact with the lower end face of the float 14 at a position where the float 14 is seated at the upper valve port 12 and the valve element 15 is seated at the lower valve port 13. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention opens and closes a valve port that connects a valve chamber and an outlet by the rising and falling of a float accommodated in a valve chamber, and automatically drains steam, compressed air, and condensed water generated in a gas piping system. More particularly, the present invention relates to a float drain trap capable of opening and closing a valve port having a large opening area.
[0002]
[Prior art]
A conventional float type drain trap capable of opening and closing a valve port having a large opening area is disclosed in, for example, Japanese Patent Application Laid-Open No. H11-82885. As understood from this publication, an inlet, a valve chamber, and an outlet are formed in a casing, and an upper valve port and a lower valve port are provided on the same axis in the upper and lower directions communicating the valve chamber and the outlet, and a float that opens and closes the upper valve port. Is disposed in the valve chamber above the upper valve port, the valve element for opening and closing the lower valve port is disposed on the outlet side above the lower valve port, and the float and the valve element are screw-connected. By causing the fluid pressures of the valve chamber and the outlet to act in opposite directions, a valve port having a large opening area including an upper valve port and a lower valve port can be opened and closed.
[0003]
[Problems to be solved by the invention]
In the above-mentioned conventional float type drain trap, even if the joint between the float and the valve body is machined with high precision, the float and the valve body are simultaneously operated due to the difference in the screwing amount and the screwing angle when connecting the float and the valve body. There was a problem that the upper and lower valve openings could not be seated.
[0004]
Therefore, a technical problem of the present invention is to provide a float type drain trap in which a float and a valve element can be simultaneously seated on an upper valve port and a lower valve port.
[0005]
[Means for Solving the Problems]
The technical means of the present invention taken in order to solve the above technical problem is to form an inlet, a valve chamber, and an outlet in a casing, and to connect the valve chamber and the outlet with an upper valve port and a lower valve on the same upper and lower axes. A port is provided, a float that opens and closes the upper valve port is disposed in the valve chamber above the upper valve port, a valve body that opens and closes the lower valve port is disposed on the outlet side above the lower valve port, and a lower end face of the float is provided. In a float type drain trap, an upper end surface of a valve body is abutted.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
In the float type drain trap of the present invention, the float and the valve element are not screwed together, but the lower end face of the float and the upper end face of the valve element are in contact with each other. Can sit at the valve.
[0007]
【Example】
An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A cover 2 is fixed to the main body 1 by fastening means (not shown) such as bolts, and a casing having a valve chamber 3 therein is formed. An inlet 4 is formed in the upper part of the main body 1 and communicates with the valve chamber 3 through an inflow passage 6 partitioned by a partition wall 5. A ventilation hole 7 is opened at the upper end of the partition 5.
[0008]
A valve seat member opening 8 is opened in the main body 1, and a valve seat member 9 protruding into the valve chamber 3 is fixed by fastening means (not shown) such as a bolt. An outlet 11 communicating with the valve seat member 9 through an outflow passage 10 formed therein is formed. The upper valve port 12 is opened on the upper wall of the valve seat member 9 and the lower valve port 13 is opened on the lower wall. The valve chamber 3 communicates with the outlet 11 from the upper valve port 12 and the lower valve port 13 through the outflow passage 10. The lower valve port 13 is formed below the upper valve port 12 and on the same axis as the upper valve port 12. The opening area of the lower valve port 13 is formed to be the same as or slightly smaller than the opening area of the upper valve port 12.
[0009]
A float 14 for opening and closing the upper valve port 12 is disposed on the valve chamber 3 side above the upper valve port 12, and a valve body 15 for opening and closing the lower valve port 13 is disposed on the outlet 11 side above the lower valve port 13. An upper guide rod 16 is integrally formed on the upper surface of the valve body 15, and a lower guide rod 17 is formed on the same axis as the upper guide rod 16 on the lower surface. At a position where the float 14 is seated on the upper valve port 12 and the valve body 15 is seated on the lower valve port 13, the axes of the upper guide rod 16 and the lower guide rod 17 pass through the ball center of the float 14 and The upper end surface contacts the lower end surface of the float 14. The upper guide bar 16 is vertically slid and guided by an upper support member 18 fixed to the valve seat member 9, and the lower guide bar 17 is vertically slid and guided by a lower support member 19 fixed to the valve seat member 9. The float 14 is vertically slid and guided by a support cylinder 20 having a large number of communication holes fixed between the lid 2 and the valve seat member 9.
[0010]
The operation of the above embodiment is as follows.
In the state shown in the figure, the drain flowing from the inlet 4 into the valve chamber 3 through the inflow passage 6 is small, the float 14 descends and sits on the upper valve port 12, and the valve body 15 is pushed down as the float 14 descends. 2 shows a closed state in which the seat is seated on the lower valve port 13. When the liquid level of the valve chamber 3 rises due to the drain that flows into the valve chamber 3 from the inlet 4 through the inflow passage 6, the float 14 floats with the rise of the liquid level, moves away from the upper valve port 12, and The valve body 15 is lifted by the fluid pressure of the valve chamber 3 as it floats and is separated from the lower valve port 13, the upper valve port 12 and the lower valve port 13 are opened, and the drain of the valve chamber 3 is discharged from the outflow passage 10. Discharge to 11 By applying the fluid pressures of the valve chamber 3 and the outlet 11 to the float 14 and the valve body 15 in opposite directions, a valve opening having a large opening area including the upper valve port 12 and the lower valve port 13 can be opened and closed.
[0011]
When the liquid level in the valve chamber 3 drops due to the discharge of the drain, the float 14 descends and sits on the upper valve port 12 with the decrease in the liquid level, and the valve body 15 is pushed down as the float 14 descends. The valve returns to the valve-closed state in which the valve 13 is seated.
[0012]
【The invention's effect】
The present invention has the following specific effects.
As described above, the float type drain trap according to the present invention has a structure in which the lower end surface of the float is in contact with the upper end surface of the valve body without screw-connecting the float and the valve body. The seat can be seated at the valve port and the lower valve port, and an excellent effect of preventing leakage of steam, compressed air or gas is produced.
[Brief description of the drawings]
FIG. 1 is a sectional view of a float type drain trap according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Valve room 4 Inlet 9 Valve seat member 11 Outlet 12 Upper valve port 13 Lower valve port 14 Float 15 Valve element

Claims (1)

An inlet, a valve chamber, and an outlet are formed in the casing, and an upper valve port and a lower valve port are provided on the same axis in the upper and lower directions communicating the valve chamber and the outlet, and a float for opening and closing the upper valve port is provided in the valve chamber above the upper valve port. Wherein a valve element for opening and closing the lower valve port is disposed on the outlet side above the lower valve port, and a lower end surface of the float and an upper end surface of the valve element are brought into contact with each other.

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