JP4971110B2 - Float type steam trap - Google Patents

Description

 The present invention relates to a float type steam trap that automatically discharges drain generated in a steam piping system by floating up and down of a float, and more particularly to a type that can clean foreign matter adhering to the inner surface of a discharge passage that opens and closes the float.

 In the conventional float trap, an inlet, a valve chamber, and an outlet are formed in the trap casing, a discharge passage that communicates the valve chamber with the outlet side is formed in the lower portion of the valve chamber, and a float that opens and closes the discharge passage is disposed in the valve chamber. Then, an operation member that can be manually advanced and retracted from the outside is disposed in the discharge passage, and foreign matter adhering to the inner surface of the discharge passage due to advancement and retraction of the operation member is cleaned.

The conventional float trap has a problem that a manual gap is required to clean the foreign matter adhering to the inner surface of the discharge passage because the operating member is manually advanced and retracted.
Japanese Utility Model Publication No. 49-36747

  The problem to be solved is to enable easy and reliable cleaning of foreign matter adhering to the inner surface of the discharge passage.

  The present invention provides a spherical valve seat member that is formed in a trap casing so that an inlet, a valve chamber, and an outlet are formed in the trap casing and that has a discharge passage that communicates the valve chamber with the outlet side. A float as a valve member that opens and closes and opens and closes the discharge passage is provided with an inlet / valve seat communication passage that communicates the inlet and the spherical valve seat member, and the T-shaped discharge passage is formed in the spherical valve seat member. The spherical valve seat member can be rotated from the outside to communicate the inlet / valve seat communication passage and the outlet side, thereby cleaning the discharge passage and rotating the spherical valve seat member. Abrasive material of a spherical valve seat member is attached at a position opposite to.

  In the present invention, the spherical valve seat member is rotated from the outside to communicate the inlet / valve seat communication passage and the outlet side, whereby the high-pressure fluid on the inlet side, that is, the mixed fluid of drain and steam, or the drain When discharged, only the high-pressure steam flows through the discharge passage to the outlet side at a high speed, so that an excellent effect is achieved that the foreign matter adhering to the inner surface of the discharge passage can be cleaned easily and reliably. Further, by attaching an abrasive at a position opposite to the rotational operation of the spherical valve seat member, the spherical valve seat member can be polished with the abrasive every time the spherical valve seat member is rotated, and the outer surface of the spherical valve seat member is also polished. Can be washed.

  The float type steam trap of the present invention forms a T-shaped discharge passage in the spherical valve seat member, but the direction opposite to the discharge direction in which the steam trap discharges drain from the discharge passage by normal operation. By generating the flow direction in the discharge passage, the discharge passage can be more reliably cleaned by so-called back washing.

  In FIG. 1, a trap casing is formed by a main body 1 and a lid 2, and a valve chamber 4 is formed inside. The main body 1 has an inlet 5, an inlet / valve seat communication path 3, an outlet path 6 and an outlet 7, and the inlet 5 communicates with the inlet / valve seat communication path 3 and the upper part of the valve chamber 4. The inlet 5 and the outlet 7 are formed on the same axis.

A spherical valve seat member 9 having a T-shaped discharge passage 8 in the lower part of the valve chamber 4 is disposed so as to be rotatable. As shown in FIG. 1, the spherical valve seat member 9 opens the discharge passage 8 to the outlet passage 6, opens the passage end 10 of the discharge passage 8 into the valve chamber 4, and the passage end 11 of the discharge passage 8 is the polishing member. 12 in a closed state. When the spherical valve seat member 9 is rotated 90 degrees clockwise from the state shown in FIG. 1 by a rotary handle or the like attached outside the trap casing (not shown), the discharge passage 8 is closed by the polishing member 12 and the end of the passage 11 can open to the inlet / valve seat communication passage 3 and the passage end 10 can open to the outlet passage 6. A hollow spherical float 13 that opens and closes in the valve chamber 4 and opens and closes the discharge passage 8, in the case of FIG. 1, opens and closes on the valve chamber side end face of the valve seat member 9. A float seat 14 with which the float 13 abuts at a position where the passage end 10 is closed is provided below the float 13.

  In FIG. 1, a part of the drain that flows from the inlet 5 flows down into the inlet / valve seat communication passage 3, and the remaining drain flows down into the valve chamber 4. The drain that has flowed into the inlet / valve seat communication passage 3 does not flow toward the outlet 7 by the spherical valve seat member 9, and the drain that has filled the inlet / valve seat communication passage 3 overflows into the valve chamber 4. To do. The float 13 rises and falls according to the liquid level of the drain accumulated in the valve chamber 4, and is seated on the valve seat member 9 to open and close the passage end 10 of the discharge passage 8. When the passage end 10 is opened, drain in the valve chamber 4 is discharged to the outlet 7 through the discharge passage 8 and the outlet passage 6, and when the passage end 10 is closed, leakage of steam in the valve chamber 4 is prevented.

When the spherical valve seat member 9 is rotated clockwise by 90 degrees from the state shown in FIG. 1, the discharge passage 8 is closed by the polishing member 12 and the passage end 11 is opened to the inlet / valve seat communication passage 3. By opening the end 10 to the outlet passage 6, the inlet / valve seat passage 3 and the outlet 7 can be communicated with each other via the passage ends 10 and 11. In this way, by connecting the inlet / valve seat passage 3 and the outlet 7, high-pressure drain and steam on the inlet / valve seat passage 3 and the inlet 5 side flow down in the passage ends 10 and 11, and the discharge passage 8. The whole can be cleaned. Further, when the spherical valve seat member 9 rotates, the outer surface of the spherical valve seat member 9 can be polished and cleaned by the polishing member 12.

In the state of FIG. 1, the drain flows down from the passage end 10 of the spherical valve seat member 9 toward the discharge passage 8, but when the spherical valve seat member 9 is rotated clockwise by 90 degrees, the passage end 11 Thus, drain and steam can flow down to the passage end 10, that is, the passage end 10 side can be backwashed, and the entire discharge passage 8 can be more reliably washed.

Sectional drawing of the float type steam trap of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Inlet / valve seat passage 4 Valve chamber 5 Inlet 7 Outlet 8 Discharge passage 9 Spherical valve seat member 10 Passage end 11 Passage end 12 Polishing member 13 Float

Claims (1)

A trap valve casing forms an inlet, a valve chamber, and an outlet, and a spherical valve seat member having a discharge passage communicating with the valve chamber on the outlet side is attached to the trap casing so as to be rotatable, and is seated on and off the spherical valve seat member in the valve chamber. A valve member that opens and closes the discharge passage is provided with an inlet / valve seat communication passage communicating the inlet and the spherical valve seat member, and a T-shaped discharge passage is formed in the spherical valve seat member. By rotating the spherical valve seat member from the outside, the inlet / valve seat communication passage and the outlet side can be communicated to clean the discharge passage, and the position facing the rotational operation of the spherical valve seat member Float type steam trap characterized by having a spherical valve seat member abrasive attached thereto.

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