JP5507397B2 - Lever float drain trap - Google Patents

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, Depending on the position, the float that rises and falls directly or through the lever, the valve body is attached to and detached from the valve seat, and the drain is automatically discharged by opening and closing the valve port. By providing a notch, a normally open opening is formed between the valve seat and the float or the valve body. The opening area of the normally open opening is formed to a size that does not allow the drainage generated when the piping system is fed to be discharged in order to prevent the leakage of steam.

JP 52-151933 A

In the conventional float drain trap, since the opening area of the normally open opening is constant, it can be discharged from the normally open opening when it is used at a location where there is a large amount of drain generated when supplying air to the piping system. There was a problem of low drainage.

Therefore, the problem to be solved by the present invention is to provide a lever float type drain trap capable of changing the opening area of the normally open opening.

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. A stopper member for preventing the valve body from being seated on the valve seat, and providing a normally open opening across the entire seal surface of the valve seat between the valve seat and the valve body, The stopper member is attached to the screw coupling portion provided on the valve seat by being screwed so that the screw can be advanced and retracted, and the rotational position of the lever that contacts the stopper member is changed by the screw advancement and retraction operation of the stopper member. .

The lever float type drain trap according to the present invention has a stopper member for preventing the valve body from being seated on the valve seat, and a normally open over the entire seal surface of the valve seat between the valve seat and the valve body. An opening is provided, and the stopper member is screwed and attached to a screw coupling portion provided on the valve seat so that the screw can be advanced and retracted, and the rotational position of the lever that contacts the stopper member is changed by the screw advance and retract operation of the stopper member. Therefore, the opening area of the normally open opening can be changed by changing the rotational position of the lever that contacts the stopper member by the screw advance / retreat operation of the stopper member. Therefore, when it is used at a location where the amount of drain generated during air supply of the piping system is large, there is an effect that the amount of drain that can be discharged from the normally open opening can be increased.

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 plate 14 is rotatably connected to the connecting shaft 13. The lower portion of the connecting plate 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. By disposing a bolt-shaped stopper member 20 that prevents the first valve body 18 and the second valve body 19 from seating on the valve seat 9 by contacting the lower surface of the lever 11 under the left side portion of the lever 11, Between the valve seat 9 and the first valve body 18 and the second valve body 19, normally open openings 22 and 23 are provided over the entire sealing surface of the valve seat 9. The opening areas of the normally open openings 22 and 23 when the lever 11 abuts against the stopper member 20 are formed in such a size that the drain generated at the time of feeding the piping system cannot be discharged in order to prevent the leakage of steam. The stopper member 20 is attached to a screw coupling portion 21 fixedly attached to the valve seat 9 by screw coupling so that the screw can be advanced and retracted. The opening area of the normally open openings 22 and 23 is changed by changing the rotational position of the lever 11 in contact with the stopper member 20 by the screw advance / retreat operation of the stopper member 20. When the drain amount that can be discharged from the normally open openings 22 and 23 is reduced, the operation member 24 is screwed from the state shown in FIG. 1, and when the drain amount that can be discharged from the normally open openings 22 and 23 is increased, the drain amount shown in FIG. The operating member 24 is unscrewed from the state.

The operation of the lever float type drain trap is as follows. When the liquid level in the valve chamber 6 is low, the float 12 descends as shown in FIG. 1, the lever 11 comes into contact with the stopper member 20, and the first valve body 18 and the second valve body 19 move to the valve seat 9. Prevents seating. Thus, normally open openings 22 and 23 are formed between the valve seat 9 and the first valve body 18 and the second valve body 19 over the entire seal surface of the valve seat 9 so that the drain of the valve chamber 6 is normally opened. The water is discharged from the openings 22 and 23 to the outlet 2 through the first valve port 7 and the second valve port 8. When the drain that flows into the valve chamber 6 increases and the liquid level in the valve chamber 6 rises, the float 12 moves upward and the lever 11 rotates clockwise about the swing shaft 10 as shown in FIG. To do. The rotation of the lever 11 causes the valve body 15 to move downward through the connecting rod 14, further separating the first valve body 18 and the second valve body 19 from the valve seat 9, and draining the valve chamber 6 to the first It discharges to the outlet 2 through the valve port 7 and the second valve port 8.

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 moves upward via the connecting rod 14, and the first valve body 18 and the second valve body 19 approach the first valve port 7 and the second valve port 8. The lever 11 abuts against the stopper member 20 to prevent the first valve body 18 and the second valve body 19 from being seated on the valve seat 9, and the valve seat 9, the first valve body 18 and the second valve A normally open opening 22, 23 is formed between the body 19 over the entire sealing surface of the valve seat 9, and the drain of the valve chamber 6 is discharged from the normally open gap 22, 23 to the first valve port 7 and the second valve port 8. Through to outlet 2.

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 21 Screw coupling part 22, 23 Normally open opening

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. A stopper that prevents the valve body from seating on the valve seat in a float that floats and descends and drains automatically by opening and closing the valve body by opening and closing the valve seat through the lever. A member is placed in the valve chamber, a normally open opening is provided between the valve seat and the valve body over the entire seal surface of the valve seat, and a stopper member is screw-coupled to the screw joint provided in the valve seat so that the screw can be advanced and retracted The lever float type drain trap is characterized in that the rotation position of the lever that contacts the stopper member is changed by the screw advance / retreat operation of the stopper member.

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