JP5290117B2 - Lever float drain trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To remove foreign matters attached on an orifice in a lever float type drain trap for automatically discharging drain produced in a steam piping system, a compressed air piping system and a gas piping system through the utilization of a float. <P>SOLUTION: A valve seat 9 with first and second valve ports 7 and 8 opened is formed in the lower part of the valve chest 6. While a float 12 floating up and down according to a liquid level in the valve chest 6 is connected to the lever 11, a valve element 15 seating on and separating from the valve seat 9 is connected to the lever 11. The orifice 22 formed in an opening area which cannot discharge all drain produced during air feeding in a piping system is formed in the lower part of the valve chest 6. A foreign matter removing member 24 for removing foreign matters attached to the orifice 22 by advancing thereto when the valve element 15 is separated from the valve seat 9 via the lever 11 by surfacing the float 12 is connected to the lever 11. An operation member 25 is provided so that a screw can be moved forward and backward in a lever 11 direction from the outside of a lid body 4, and is always spaced from the lever 11. When screwing the operation member 25, the operation member 25 abuts on the lever 11 to separate the valve element 15 from the valve seat 9, thereby forcing the foreign matter removing member 24 to advance in the orifice 22. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to a lever float drain trap that automatically discharges drain generated in a steam piping system, compressed air piping system, and gas piping system using a float.

A conventional float drain trap is disclosed in Patent Document 1, for example. This is because the casing forms an inlet, a valve chamber, and an outlet, a valve seat that opens a valve port that connects the valve chamber and the outlet is formed in the lower portion of the valve chamber, a float is accommodated in the valve chamber, The float that rises and falls depending on the position is discharged when the valve body opens and closes the valve body directly or through the lever and opens and closes the valve port. In addition to the valve opening, an orifice formed in an opening area where the drain to be discharged cannot be discharged and communicating the valve chamber and the outlet is formed in the lower part of the valve chamber.

Japanese Patent Laid-Open No. 10-141593

In the conventional float type drain trap, since the opening area of the orifice is relatively small, foreign matter such as dust, rust and scale in the drain flowing down the orifice easily adheres to the orifice and gradually accumulates for a relatively short period of time. There was a problem that the orifice was clogged.

Therefore, the problem to be solved by the present invention is to provide a lever float type drain trap capable of removing foreign substances adhering to the orifice.

In order to solve the above-mentioned problems, the lever float type drain trap of the present invention has an inlet, a valve chamber, and an outlet formed in a casing, and a valve seat that opens a valve port that communicates the valve chamber and the outlet. The float is housed in the valve chamber, and the float rises and falls according to the liquid level in the valve chamber. Is formed in the opening area where the drainage generated during the air supply of the piping system cannot be discharged, and the orifice communicating with the valve chamber and the outlet is formed in the lower part of the valve chamber separately from the valve port, and the float rises When the valve body is separated from the valve seat via the lever, a foreign matter removal member that enters the orifice and removes the foreign matter adhering to the orifice is connected to the lever, and the screw can be advanced and retracted from the outside of the casing toward the lever. Operation member The operating member and the lever are normally separated from each other, and when the operating member is screwed in, the operating member comes into contact with the lever to separate the valve body from the valve seat and allow the foreign substance exclusion member to enter the orifice. Is.

According to the present invention, an orifice that is formed in an opening area that cannot completely discharge drain generated when air is supplied to the piping system and that communicates the valve chamber and the outlet is formed in the lower portion of the valve chamber separately from the valve port, and the float floating When the valve body is separated from the valve seat via the lever, the foreign substance removing member that enters the orifice and removes the foreign substance attached to the orifice is connected to the lever. As a result, the foreign matter that enters the orifice and adheres to the orifice can be automatically eliminated. An operating member is provided so that the screw can be moved forward and backward from the outside of the casing. The operating member and the lever are normally separated from each other. When the operating member is screwed in, the operating member comes into contact with the lever to separate the valve body from the valve seat. Since the foreign object eliminating member is caused to enter the orifice while being seated, the foreign substance adhering to the orifice can be manually eliminated by screwing the operating member and allowing the foreign object eliminating member to enter the orifice.

It is sectional drawing of the lever float type drain trap concerning embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIG. The lever float type drain trap constitutes a casing having a valve chamber 6 inside by fastening a lid 4 with a bolt 5 to a main body 3 having an inlet 1 and an outlet 2. A valve seat 9 having a first valve port 7 and a second valve port 8 communicating with the valve chamber 6 and the outlet 2 is attached to a main body 3 below the valve chamber 6 with a screw (not shown). The inlet 1 opens to the lower part of the valve chamber 6, and the outlet 2 opens to the lower part of the valve chamber 6 through the first valve port 7 and the second valve port 8.

A swing shaft 10 is supported on a valve seat 9 in the valve chamber 6, and a lever 11 is rotatably connected to the swing shaft 10. A hollow spherical float 12 that rises and falls according to the liquid level in the valve chamber 6 is connected to the left end of the lever 11. A connecting shaft 13 parallel to the swing shaft 10 is supported on the right side of the swing shaft 10 of the lever 11, and the upper portion of the connecting rod 14 is rotatably connected to the connecting shaft 13. The lower portion of the connecting rod 14 is rotatably connected to a valve shaft 17 parallel to the swing shaft 10 supported on the upper end portion of the valve rod 16 of the valve body 15. The valve body 15 includes a first valve body 18 that opens and closes the first valve port 7 from the lower outlet 2 side, a second valve body 19 that opens and closes the second valve port 8 from the lower valve chamber 6 side, and a first valve It comprises a valve rod 16 connecting the body 18 and the second valve body 19. When the lever 11 further rotates in the valve closing direction from the position where the first valve body 18 and the second valve body 19 close the first valve port 7 and the second valve port 8, the stopper member 20 with which the lever 11 contacts the lever 11 It attaches to the valve seat 9 with the volt | bolt 21 below. The stopper member 20 is substantially L-shaped in cross section and has a substantially vertical surface attached to the valve seat 9 with bolts 21 and a substantially horizontal surface extending in the direction of the float 12.

In addition to the first valve port 7 and the second valve port 8, an orifice 22 that communicates the valve chamber 4 and the outlet 2 is formed in the valve seat 9 next to the first valve port 7 below the valve chamber 6.
The opening area of the orifice 22 is formed so as not to be able to discharge the drain generated when the piping system supplies air. A connecting shaft 23 parallel to the swing shaft 10 is supported on the right end portion of the lever 11, and the upper end of the foreign matter exclusion member 24 is rotatably connected to the connecting shaft 23. The foreign matter removing member 24 enters the orifice 22 when the valve body 15 is separated from the valve seat 9 due to the float 12 floating, and removes the foreign matter attached to the orifice 22. An operating member 25 is provided through the upper wall of the lid 4 so that the screw can be advanced and retracted in the direction of the lever 11 from the outside. The operation member 25 is displaced up and down by a screw advance / retreat operation from the outside of the lid 4 with respect to the screw hole 26 of the lid 4. An annular seal member 27 is disposed between the inner circumferential surface of the lid body 4 and the outer circumferential surface of the operation member 25 at a rear portion of the screw hole 26 of the lid body 4, and a pressing member 28 is screwed into the lid body 4. By pressing the seal member 27, the space between the lid 4 and the operation member 25 is kept in a watertight state. A handle 29 for rotating the operation member 25 is fixed to the upper end of the operation member 25. The operation member 25 and the lever 11 are usually separated as shown in FIG. When the operating member 25 is screwed in, the operating member 25 comes into contact with the lever 11 to separate the valve body 15 from the valve seat 9, and the foreign matter removing member 24 enters the orifice 22 to remove foreign matter attached to the orifice 22. To do.

The operation of the lever float type drain trap is as follows. Usually, as shown in FIG. 1, the operating member 25 and the lever 11 are used apart from each other. When the liquid level in the valve chamber 6 is low, the float 12 descends, the first valve body 18 and the second valve body 19 are seated on the valve seat 9, and the first valve port 7 and the second valve port 8 are closed. ing. At this time, the foreign substance exclusion member 24 is positioned above the orifice 22 and does not enter the orifice 22. When the liquid level in the valve chamber 6 rises due to the drain flowing from the inlet 1, the float 12 moves up, and the lever 11 rotates around the swing shaft 10 in the clockwise direction. The rotation of the lever 11 causes the valve body 15 to move downward via the connecting rod 14 so that the first valve body 18 and the second valve body 19 are separated from the valve seat 9 and the first valve port 7 and the second valve Open mouth 8. Thereby, the drain of the valve chamber 6 is discharged from the outlet 2. At this time, the foreign matter exclusion member 24 automatically enters foreign matter adhering to the orifice 22 by entering the orifice 22.

When the liquid level in the valve chamber 6 decreases due to the drainage, the float 12 moves downward and the lever 11 rotates counterclockwise about the swing shaft 10. Due to the rotation of the lever 11, the valve body 15 is moved upward via the connecting rod 14, and the first valve body 18 and the second valve body 19 are seated on the valve seat 9, and the first valve port 7 and the second valve port Close 8 This prevents gas leakage. At this time, the foreign substance exclusion member 24 is extracted from the orifice 22 and positioned above the orifice 22. When the foreign matter adhering to the orifice 22 is manually removed, the handle 29 is rotated, the operating member 25 is screwed, the operating member 25 is brought into contact with the lever 11, and the valve body 15 is separated from the valve seat 9, thereby removing the foreign matter. The member 24 is advanced into the orifice 22.

INDUSTRIAL APPLICABILITY The present invention can be used for a lever float drain trap that automatically discharges drain generated in a steam piping system, compressed air piping system, or gas piping system using a float.

DESCRIPTION OF SYMBOLS 1 Inlet 2 Outlet 3 Main body 4 Lid body 6 Valve chamber 7 1st valve port 8 2nd valve port 9 Valve seat 10 Oscillating shaft 11 Lever 12 Float 15 Valve body 16 Valve rod 18 First valve body 19 Second valve body 20 Stopper member 22 Orifice 24 Foreign matter exclusion member 25 Operation member

Claims (1)

The casing forms an inlet, a valve chamber, and an outlet. A valve seat that opens the valve port that connects the valve chamber and the outlet is formed in the lower portion of the valve chamber. A float is accommodated in the valve chamber, depending on the liquid level in the valve chamber. The drain that floats up and down automatically drains the valve body by opening and closing the valve seat by opening and closing the valve seat through the lever. An orifice that has a small opening area and communicates the valve chamber and the outlet is formed in the lower part of the valve chamber separately from the valve port, and when the valve body is separated from the valve seat via the lever due to the floating of the float, A foreign matter removal member that removes foreign matter that enters and adheres to the orifice is connected to the lever, and an operation member is provided so that the screw can be advanced and retracted in the lever direction from the outside of the casing. The operation member and the lever are normally separated from each other. Screw in the operation unit There lever float type drain trap, characterized in that advancing the foreign object removing member unseats the contact with the valve body to the lever from the valve seat into the orifice.

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