JP5001249B2 - Float type drain trap - Google Patents

Description

  The present invention relates to a float-type drain trap that automatically discharges steam, compressed air, and drain generated in a gas piping system by floating up and down of the float, and in particular, fluid that adheres to the inner surface of a discharge passage of a valve seat member on which the float is seated. It relates to things that can clean foreign matter inside.

  A conventional float drain trap is formed with a valve casing that forms an inlet, a valve chamber, and an outlet. A valve seat member having a discharge passage communicating with the valve chamber on the outlet side is attached to a lower portion of the valve chamber. A float that opens and closes the discharge passage by separating and seating is provided, an operation member that can be moved forward and backward from the outside is arranged in the discharge passage, and the operation member is moved forward and backward to clean foreign matter adhering to the inner surface of the discharge passage of the valve seat member It is.

The above-mentioned conventional float type drain trap can clean foreign matter adhering to the inner surface of the discharge passage of the valve seat member by moving the operating member back and forth from the outside. Therefore, there is a problem in that the operation member is moved back and forth unnecessarily for cleaning. This is because when the drain is no longer discharged from the float drain trap, cleaning is performed by moving the operating member forward and backward, assuming that foreign matter has adhered to the inner surface of the discharge passage of the valve seat member. No foreign matter is attached to the inner surface of the discharge passage of the member, and the valve placed upstream of the float drain trap may be closed or closed, or the piping system may be out of operation. It is.
Japanese Utility Model Publication No. 49-36747

  The problem to be solved is to be able to confirm from the outside whether foreign matter has adhered to the inner surface of the discharge passage of the valve seat member of the float type drain trap so that it can be cleaned at an appropriate time.

In the present invention, the valve casing forms an inlet, a valve chamber, and an outlet, a valve seat member having a discharge passage communicating with the valve chamber on the outlet side is attached to the lower portion of the valve chamber, and is seated on and off the valve seat member. A float that opens and closes the discharge passage, and the opening area of the discharge passage is designed to allow the float to discharge drain generated over the entire pressure range from the beginning of air supply to normal operation. In the float drain trap A for cleaning the foreign matter adhering to the inner surface of the discharge passage of the valve seat member by moving the operating member forward and backward in the discharge passage, the valve casing and the inlet are provided above the float drain trap A. forming a valve chamber and an outlet, fitted with a valve seat member having a discharge passage communicating the valve chamber on the outlet side to the valve chamber bottom is provided with a float that opens and closes the discharge passage and away seated on the valve seat member in the valve chamber, Out opening area of the passage is disposed an upper float drain trap B was formed to a size capable of draining the float is generated over the entire pressure range from the air early to the normal operation, the inlet of the float drain trap A And the inlet of the upper float drain trap B are connected to a common inlet pipe .

According to the present invention, the drain is not discharged from the lower float drain trap A and the drain is discharged from the upper float drain trap B, so that the foreign matter is formed on the inner surface of the discharge passage of the valve seat member of the lower float drain trap A. It is possible to confirm that the adhering material has adhered, and it is possible to clean the foreign matter adhering to the inner surface of the discharge passage of the valve seat member of the lower float type drain trap A by moving the operating member back and forth from the outside at an appropriate time. Produces a positive effect.

The float type drain trap of the present invention has an upper float type drain trap B arranged above the float type drain trap A that can move the operation member forward and backward from the outside and clean foreign matter adhering to the inner surface of the discharge passage of the valve seat member , The inlet of the float drain trap A and the inlet of the upper float drain trap B are connected to a common inlet pipe . Therefore, drain is not discharged from the lower float drain trap A and drain is discharged from the upper float drain trap B , so that the lower float drain does not close or close the valve disposed upstream. Since it can be confirmed that foreign matter has adhered to the inner surface of the discharge passage of the valve seat member of the trap A, the inner surface of the discharge passage of the valve seat member of the lower float type drain trap A by moving the operating member forward and backward at an appropriate time. The foreign matter adhering to can be cleaned.

  An embodiment showing a specific example of the above technical means will be described (see FIG. 1). The lower float drain trap A is formed with a valve casing 4 by fastening a lid 2 to a main body 1 with bolts 3 and a valve chamber 4 therein. The main body 1 has an inlet 5, an outlet passage 6 and an outlet 7, and the inlet 5 communicates with the upper portion of the valve chamber 4. The inlet 5 and the outlet 7 are formed on the same axis in the horizontal direction. A valve seat member 9 having a discharge passage 8 is screwed to the lid 2 at the bottom of the valve chamber 4. The discharge passage 8 includes a small-diameter leading end at the end of the valve chamber 4, a tapered portion whose diameter increases toward the downstream downstream of the leading end, and a large-diameter trailing end downstream of the tapered portion. The lid 2 has an outlet passage 10, and the lower portion of the valve chamber 4 communicates from the discharge passage 8 to the outlet 7 through the outlet passages 10 and 6. A hollow spherical float 11 that opens and closes the discharge passage 8 by being seated on the valve chamber side end face of the valve seat member 9 is disposed in the valve chamber 4 in a free state. Two float seats 12 with which the float 11 abuts at the position where the discharge passage 8 is closed are provided below the float 11 on the side facing the front side of the drawing. The opening area of the front end portion of the discharge passage 8 is formed such that the corresponding float 11 can discharge drain generated over the entire pressure range from the beginning of air supply to the normal operation.

  A plug 13 is screwed to the lid 2 on the same axis as the valve seat member 9. The operating member 14 is screwed to the plug 13 so as to be adjustable from the outside. The operation member 14 penetrates the plug 13, and a distal end portion located downstream of the distal end portion of the discharge passage 8 projects into the valve chamber 4 by advancement, and a rear end portion is located outside. A packing 15 as a sealing member for keeping the airtightness of the operation member 14 is arranged between the plug 13 and the operation member 14, and a packing presser 16 is screwed to the plug 13 to keep the airtightness between the plug 13 and the operation member 14. The outer diameter of the distal end portion of the operation member 14 is formed to be slightly smaller than the inner diameter of the distal end portion of the discharge passage 8, and the inner surface of the distal end portion of the discharge passage 8 at the distal end portion of the operation member 14 when the operation member 14 is advanced. To clean.

  In the upper float type drain trap B, a lid 22 is fastened to a main body 21 with bolts 23 to form a valve casing, and a valve chamber 24 is formed inside. The main body 21 has an inlet 25, an outlet passage 26 and an outlet 27, and the inlet 25 communicates with the upper portion of the valve chamber 24. The inlet 25 and the outlet 27 are formed on the same axis in the horizontal direction. A valve seat member 29 having a discharge passage 28 is screwed to the lid 22 at the bottom of the valve chamber 24. The discharge passage 28 includes a small-diameter leading end at the end of the valve chamber 24, a tapered portion whose diameter increases toward the downstream downstream of the leading end, and a large-diameter trailing end downstream of the tapered portion. The lid 22 has an outlet passage 30, and the lower portion of the valve chamber 24 communicates from the discharge passage 28 to the outlet 27 through the outlet passages 30 and 26. A hollow spherical float 31 that opens and closes the discharge passage 28 by being seated on the valve chamber side end face of the valve seat member 29 is disposed in the valve chamber 24 in a free state. Two float seats 32 with which the float 31 abuts at the position where the discharge passage 28 is closed are provided below the float 31 on the side facing the front side of the drawing. The opening area of the tip of the discharge passage 28 has the same diameter as the tip of the discharge passage 28 of the lower float drain trap A, and the corresponding float 31 generates drain generated over the entire pressure range from the beginning of air supply to normal operation. It is formed in a size that can be discharged.

  The inlet 5 of the lower float drain trap A is connected to the inlet pipe 41a bent in the horizontal direction from the lower end of the vertical inlet pipe 41, and the inlet 5 of the upper float drain trap B is horizontal from the vertical inlet pipe 41. Connected to the inlet pipe 41b branched in the direction. An outlet pipe 42 a is connected to the outlet 7 of the lower float drain trap A, and an outlet pipe 42 b is connected to the outlet 27 of the upper float drain trap B. An upper float drain trap B is positioned above the lower float drain trap A. A valve 43 that opens and closes the inlet pipe 41 is disposed upstream of the part where the inlet pipe 41b of the inlet pipe 41 branches.

  The valve 43 arranged in the inlet pipe 41 is normally used in a valve open state. Condensate in the inlet pipe 41 flows into the valve chamber 4 from the inlet 5 of the lower float type drain trap A through the inlet pipe 41a and accumulates, and the float 11 rises and falls according to the liquid level and separates into the valve seat member 9. It sits down and opens and closes the discharge passage 8. When the discharge passage 8 is opened, drain in the valve chamber 4 is discharged to the outlet 7 through the discharge passage 8 and the outlet passages 6 and 10, and when the discharge passage 8 is closed, leakage of gas in the valve chamber 4 is prevented. When foreign matter adheres to the inner surface of the discharge passage 8 of the valve seat member 9 of the lower float drain trap A and the drain cannot be discharged, the condensate in the inlet pipe 41 passes through the inlet pipe 41b and the inlet 25 of the upper float drain trap B. Then, it flows into the valve chamber 24 and accumulates, and the float 31 rises and falls according to the liquid level and is seated on and off the valve seat member 29 to open and close the discharge passage 28. When the discharge passage 28 is opened, drain in the valve chamber 24 is discharged to the outlet 27 through the discharge passage 28 and the outlet passages 26 and 30, and when the discharge passage 28 is closed, leakage of gas in the valve chamber 24 is prevented.

  Since drain is not discharged from the lower float drain trap A and drain is discharged from the upper float drain trap B, the valve 43 disposed upstream is not closed or closed, or the operation of the piping system is not stopped. Since it can be confirmed that foreign matter has adhered to the inner surface of the discharge passage 8 of the valve seat member 9 of the lower float drain trap A, the operation member 14 is advanced and retracted from the outside, and the valve seat of the lower float drain trap A is Foreign matter adhering to the inner surface of the discharge passage 8 of the member 9 is cleaned.

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

Explanation of symbols

A Lower float drain trap 1 Main body 2 Lid 4 Valve chamber 5 Inlet 7 Outlet 8 Discharge passage 9 Valve seat member 11 Float 14 Operation member B Upper float type drain trap 21 Main body 22 Lid 24 Valve chamber 25 Inlet 27 Outlet 28 Exhaust passage 29 Valve seat member 31 Float

Claims (1)

The valve casing forms an inlet, a valve chamber, and an outlet, and a valve seat member having a discharge passage communicating with the valve chamber on the outlet side is attached to the lower portion of the valve chamber, and is seated on and off the valve seat member to open and close the discharge passage. An opening area of the discharge passage is formed in a size that allows the float to discharge drain generated over the entire pressure range from the beginning of air supply to normal operation . In the float type drain trap A that is disposed in the front and back and cleans the foreign matter adhering to the inner surface of the discharge passage of the valve seat member by moving the operation member forward and backward, an inlet, a valve chamber, and an outlet are provided above the float type drain trap A with a valve casing. It is formed and attaching a valve seat member having a discharge passage communicating the valve chamber on the outlet side to the valve chamber bottom is provided with a float that opens and closes the discharge passage and away seated on the valve seat member in the valve chamber, the discharge passage Mouth area is arranged an upper float drain trap B was formed to a size capable of draining the float is generated over the entire pressure range from the air early to the normal operation, the inlet and the upper float float drain trap A A float type drain trap, wherein the inlet of the type drain trap B is connected to a common inlet pipe .

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