JP2011021685A - Lever float type drain trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To change an opening area of a normally-opened opening. <P>SOLUTION: A casing composed of a body 3 and a lid body 4 is formed with an inlet 1, a valve chamber 6, and an outlet 2, and a valve seat 9 having a first valve opening 7 and a second valve opening 8 which make the valve chamber 6 communicate with the outlet 2 is formed at a lower part of the valve chamber 6. A lever 11 which rotates around an oscillating shaft 10 is connected with a float 12 while being connected with first/second valve elements 18, 19 seated on and separated from the valve seat 9. A first stopper member 20 for preventing the first/second valve elements 18, 19 from being seated on the valve seat 9 is arranged in the valve chamber 6. Normally-opened openings 22, 23 are formed between the valve seat 9 and the first/second valve elements 18, 19. A second stopper member 21 for preventing the first/second valve elements 18, 19 from being separated from the valve seat 9 is arranged in the valve chamber 6. The first/second stopper members 20, 21 are fixed to an operation member 24 provided so as to be capable of performing screw advancing/retreating operation from the outside of the casing, and the first/second stopper members 20, 21 can be displaced by the screw advancing/retreating operation of the operation member 24. <P>COPYRIGHT: (C)2011,JPO&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, 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. The first stopper member for preventing the valve body from being seated on the valve seat is disposed in the valve chamber so that a normally open opening over the entire seal surface of the valve seat is provided between the valve seat and the valve body. A second stopper member is provided in the valve chamber to prevent the valve body from separating from the valve seat, and the first stopper member and the second stopper member are provided on the operation member provided to be able to advance and retract from the outside of the casing. The first stopper is fixed by operating the screw of the operating member. It is characterized in that the allowed to displace the timber and a second stopper member.

In the lever float type drain trap of the present invention, the first stopper member for preventing the valve body from being seated on the valve seat is disposed in the valve chamber, and extends across the entire sealing surface of the valve seat between the valve seat and the valve body. A second stopper member that is provided with a normally open opening and prevents the valve body from separating from the valve seat is disposed in the valve chamber, and the first stopper member and the second stopper member are provided on the operation member that is provided so that the screw can be advanced and retracted from the outside of the casing. 2 The stopper member is fixed, and the first stopper member and the second stopper member are displaced by the screw advance / retreat operation of the operation member. Therefore, the opening area of the normally open opening is changed by the first stopper member by displacing the first stopper member and the second stopper member by the screw advance / retreat operation of the operation member, or the valve body is moved to the valve seat by the second stopper member. It is possible to prevent the user from being separated from the seat. Therefore, by changing the opening area of the normally open opening, it is possible to increase the amount of drainage that 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 airing the piping system. There is an effect. In addition, by preventing the valve body from separating from the valve seat, it is possible to prevent the float from colliding with the inner wall of the casing or the valve body from colliding with the valve seat during transportation. There is an effect that can be prevented.

It is sectional drawing of the state which provided the normally open opening of the lever float type drain trap concerning embodiment of this invention. It is sectional drawing of the fully open state of the lever float type drain trap concerning embodiment of this invention. It is sectional drawing of the state which prevented the valve body of the lever float type drain trap concerning embodiment of this invention separating from the valve seat.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3. 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 first stopper member 20 on the right end of the lever 11 to prevent the first valve body 18 and the second valve body 19 from seating on the valve seat 9 by contacting the upper surface of the lever 11, the valve Between the 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. When the lever 11 comes into contact with the first stopper member 20, the opening areas of the normally open openings 22 and 23 are formed so as not to be able to discharge the drain generated when air is supplied to the piping system in order to prevent the leakage of steam. To do. A second stopper member 21 that prevents the lower surface of the lever 11 from coming into contact with the lower end of the lever 11 to prevent the first valve body 18 and the second valve body 19 from separating from the valve seat 9 is disposed. The first stopper member 20 and the second stopper member 21 are fixed to the operation member 24. The upper portion of the operation member 24 penetrates the upper wall portion of the main body 3 and protrudes to the outside. The operation member 24 displaces the first stopper member 20 and the second stopper member 21 up and down by a screw advance / retreat operation from the outside of the main body 3 with respect to the screw hole 25 of the main body 3. An annular seal member 26 is disposed between the inner peripheral surface of the main body 3 and the outer peripheral surface of the operation member 24 at a rear portion of the screw hole 25 of the main body 3, and a pressing member 27 is screwed into the main body 3 to seal the seal member 26. To keep the space between the main body 3 and the operation member 24 in a watertight state. A handle for rotating the operation member is fixed to the upper end of the operation member 24. In order to increase the amount of drainage that can be discharged from the normally open openings 22 and 23, the first stopper member 20 is displaced downward by screwing the operating member 24 from the state shown in FIG. Further, as shown in FIG. 3, the operation member 24 is unscrewed to displace the second stopper 21 upward to prevent the first valve body 18 and the second valve body 19 from being separated from the valve seat 9. The float 12, the first valve body 18 and the second valve body 19 can be prevented from being damaged during transportation.

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 first stopper member 20, and the first valve body 18 and the second valve body 19 move to the valve seat. 9 is prevented from being seated. 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 as shown in FIG. 1 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 first 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, Between the two valve bodies 19, normally open openings 22 and 23 are formed across the entire sealing surface of the valve seat 9, and the drain of the valve chamber 6 is discharged from the normally open gaps 22 and 23 to the first valve port 7 and the second valve. Discharge to outlet 2 through mouth 8.

In the above embodiment, the lever contacts the first and second stopper members. However, the present invention is not limited to this, and the first and second stopper members are floats or valve bodies. Can also be brought into contact with each other.

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 First stopper member 21 Second stopper members 22, 23 Normally open opening 24 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 valve body is prevented from seating on the valve seat when the valve body separates and seats on the valve seat via the lever and drains automatically by opening and closing the valve port. 1 A stopper member is disposed in the valve chamber, a normally open opening is provided between the valve seat and the valve body over the entire sealing surface of the valve seat, and the second stopper member prevents the valve body from separating from the valve seat. Is disposed in the valve chamber, and the first stopper member and the second stopper member are fixed to an operation member provided so that the screw can be advanced and retracted from the outside of the casing. Lever float type door characterized by displacing Ntorappu.

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