JP2010096252A - Lever float type drain trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lever float type drain trap capable of preventing a valve element from inclining, and perfectly closing a valve port with the valve element. <P>SOLUTION: In the drain trap, a casing includes a valve chamber 6 inside by fastening a cover body 4 to a body 3 having an inlet 1 and an outlet 2. The valve port comprising a first valve port 7 and a second valve port 8 communicating the valve chamber 6 with the outlet 2 is formed in a lower part of the valve chamber 6. A rotary lever 11 is arranged around a rocking shaft 10 supported in the valve chamber 6. A float 12 floating and lowering in response to a liquid level in the valve chamber 6 is connected to the lever 11, and the valve element 15 comprising a first valve element 18 and a second valve element 19 opening-closing the first valve port 7 and the second valve port 8 is connected to the lever 11. A guide bar 16a having a substantially semi-spherical protruding part 20 at the chip is provided in the valve element 15. A substantially conical recessed part 21 is formed in the body 3 to guide the semi-spherical protruding part 20 of the guide bar 16a in the axial direction of the valve port comprising the first valve port 7 and the second valve port 8. <P>COPYRIGHT: (C)2010,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.

  The conventional lever float type drain trap has an inlet, a valve chamber, and an outlet formed in a casing, a valve port that communicates the valve chamber and the outlet is formed in the lower portion of the valve chamber, and around a swinging shaft supported in the valve chamber. A floating lever is provided, and a float that rises and falls according to the liquid level in the valve chamber is connected to the lever, and a valve body that opens and closes the valve port is connected to the lever, and rises and falls according to the liquid level in the valve chamber The drain is automatically discharged by rotating the lever with the float and opening and closing the valve port with the valve body.

In the above conventional lever float drain trap, if the valve body is tilted when closing the valve opening, it will not be able to completely close the valve opening and gas will leak out. It was.
Japanese Patent Laid-Open No. 55-112487

  The problem to be solved is to provide a lever float type drain trap in which the valve body can be prevented from tilting and the valve body can completely close the valve port.

  In the present invention, an inlet, a valve chamber, and an outlet are formed by a casing, a valve port that communicates the valve chamber and the outlet is formed in a lower portion of the valve chamber, and a lever that rotates around a swing shaft supported in the valve chamber is provided. A guide rod having a substantially hemispherical convex portion at the tip is used as a valve body in which a float that rises and falls according to the liquid level in the valve chamber is connected to the lever and a valve body that opens and closes the valve port is connected to the lever. And a substantially conical concave portion for guiding the hemispherical convex portion of the guide rod in the axial direction of the valve port is provided in the casing.

  In the present invention, a guide rod having a substantially hemispherical convex portion at the tip is provided in the valve body, and a substantially conical concave portion for guiding the hemispherical convex portion of the guide rod in the axial direction of the valve port is provided in the casing. The hemispherical convex part of the guide rod is guided by the conical concave part of the casing when the valve body is displaced toward the valve port side, and the valve body can completely close the valve port by preventing the valve body from tilting. Produce.

  The lever float type drain trap of the present invention is provided with a guide rod having a substantially hemispherical convex portion at the tip of the valve body, and a substantially conical concave portion that guides the hemispherical convex portion of the guide rod in the axial direction of the valve port. It is provided. Therefore, since the hemispherical convex portion of the guide rod is guided by the conical concave portion of the casing when the valve body is displaced toward the valve port side, the valve body can be prevented from tilting and the valve port can be completely closed.

  An embodiment showing a specific example of the above technical means will be described (see FIG. 1). The lever float type drain trap of the present invention 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 member 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 by a valve seat member 9 in the valve chamber 6, and a right side portion of 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 end portion 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 upper valve chamber 6 side, a second valve body 19 that opens and closes the second valve port 8 from the upper outlet 2 side, and a first valve It comprises a valve rod 16 connecting the body 18 and the second valve body 19. The rear end (upper end) of the valve rod 16 protrudes upward from the first valve body 18, and the upper end portion is connected to the connecting rod 14. The tip (lower end) of the valve rod 16 forms a guide rod 16 a that protrudes downward from the second valve body 19, and the tip (lower end) of the guide rod 16 a has a substantially hemispherical convex portion 20. A substantially conical recess 21 is provided in the main body 3 to guide the hemispherical protrusion 20 of the guide rod 16 a in the axial direction of the first valve port 7 and the second valve port 8.

  When the liquid level in the valve chamber 6 is low, the float 12 descends as shown in FIG. 1, and the first valve body 18 and the second valve body 19 close the first valve port 7 and the second valve port 8. Yes. 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. By 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 open the first valve port 7 and the second valve port 8. Thereby, the drain of the valve chamber 6 is discharged from the outlet 2.

  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 downward via the connecting rod 14, and the first valve body 18 and the second valve body 19 close the first valve port 7 and the second valve port 8. This prevents gas leakage. When the first valve body 18 and the second valve body 19 move downward and are displaced toward the first valve port 7 and the second valve port 8, the hemispherical convex portion 20 of the guide rod 16 a becomes the conical concave portion of the main body 3. 21 prevents the first valve body 18 and the second valve body 19 from tilting, and the first valve body 18 and the second valve body 19 completely close the first valve port 7 and the second valve port 8. it can.

Sectional drawing of the lever float type drain trap of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inlet 2 Outlet 3 Main body 4 Cover body 6 Valve chamber 7 1st valve port 8 2nd valve port 10 Oscillating shaft 11 Lever 12 Float 15 Valve body 16 Valve rod 16a Guide rod 18 1st valve body 19 2nd valve body 20 Hemispherical convex part 21 Conical concave part

Claims (1)

The casing forms an inlet, a valve chamber, and an outlet. A valve port that communicates the valve chamber and the outlet is formed in the lower portion of the valve chamber. A lever that rotates around a swing shaft supported in the valve chamber is provided. A float that rises and falls according to the liquid level is connected to the lever and a valve body that opens and closes the valve port is connected to the lever. A lever float type drain trap characterized in that a substantially conical concave portion for guiding the hemispherical convex portion in the axial direction of the valve port is provided in the casing.

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