JP2007138985A - Float type drain trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To clean foreign matter adhered to a discharge passage inner surface and a valve chest side end surface of a valve seat member. <P>SOLUTION: A valve casing is formed of a body 1 and a cover 2. An inlet 5, a valve chest 4 and an outlet 7 are formed in the valve casing. The valve seat member 9 is installed in a lower part of the valve chest 4. A discharge passage 8 formed in the valve seat member 9, communicating with the valve chest 4 with the outlet 7 side. A float 11 is arranged in the valve chest 4 for opening and closing the discharge passage 8 by sitting on and leaving from the valve seat member 9. An operation member 14 capable of operating an advance-retreat from an external part is arranged in the discharge passage 8. The flow passage area between the inner surface of the discharge passage 8 of the valve seat member 9 and the operation member 14 is increased by forming a recessed part 14b extending in the axial direction of the operation member 14 on the outer periphery of the operation member 14. When advancing the operation member 14, the discharge passage 8 is opened by leaving the float 11 from the valve seat member 9. Gas in the valve chest 4 is exhausted at once to the outlet 7 while cleaning the foreign matter adhered to the valve chest side end surface 9a of the valve seat member 9. <P>COPYRIGHT: (C)2007,JPO&INPIT

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, removes foreign matter in a fluid adhering to a valve seat member on which the float is seated. It relates to things that can be cleaned.

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

The conventional float type drain trap can clean foreign matter adhering to the inner surface of the discharge passage of the valve seat member, but there is a problem that foreign matter attached to the valve chamber side end surface of the valve seat member cannot be cleaned.
Japanese Utility Model Publication No. 49-36747

  The problem to be solved is to make it possible to clean foreign matter adhering to the inner surface of the discharge passage and the end surface on the valve chamber side of the valve seat member.

  In the present invention, an inlet, a valve chamber, and an outlet are formed in a valve casing, a valve seat member is attached to a lower portion of the valve chamber, a discharge passage that communicates the valve chamber with the outlet side is formed in the valve seat member, and the valve chamber A float that opens and closes the discharge passage by being seated on and off the seat member, and an operation member that can be moved forward and backward from the outside is disposed in the discharge passage, and a recess extending in the axial direction of the operation member is formed on the outer periphery of the operation member The flow passage area between the inner surface of the discharge passage of the valve seat member and the operation member is increased, and when the operation member is advanced, the float is separated from the valve seat member to open the discharge passage. To do.

  Since the present invention opens a large flow path between the inner surface of the discharge passage of the valve seat member and the operation member when the operation member is advanced, it is formed on the inner surface of the discharge passage of the valve seat member as in the prior art. The adhering foreign matter can be cleaned, and an excellent effect of cleaning the foreign matter adhering to the valve chamber side end face of the valve seat member is produced.

  The float type drain trap according to the present invention has an operation member that can be moved forward and backward from the outside in the discharge passage, and a recess extending in the axial direction of the operation member is formed on the outer periphery of the operation member to discharge the valve seat member. The flow passage area between the inner surface of the valve and the operation member is increased, and when the operation member is advanced, the float is separated from the valve seat member to open the discharge passage. Therefore, the foreign member adhering to the inner surface of the discharge passage of the valve seat member is cleaned by advancing the operating member as in the conventional case. Since the present invention opens a large flow path between the inner surface of the discharge passage of the valve seat member and the operation member when the operation member is advanced, the gas in the valve chamber causes the valve chamber of the valve seat member to The foreign matter adhering to the side end face is discharged to the outlet at once while cleaning.

  An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 and 2). A lid 2 is fastened to the main body 1 with bolts 3 to form a valve casing, and a valve chamber 4 is formed inside. 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. 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 portion 8a at the end of the valve chamber 4, a tapered portion 8b having a diameter increasing toward the downstream downstream of the leading end portion 8a, and a large-diameter rear end portion 8c downstream of the tapered portion 8b. Become. 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 surface 9a 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.

  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 the tip end portion 14 a located downstream of the tip end portion 8 a of the discharge passage 8 projects forward into the valve chamber 4 to separate the float 11 from the valve seat member 9 and discharge the discharge passage 8. open. The rear end portion of the operation member 14 is located outside. A packing 15 is disposed between the plug 13 and the operation member 14, and a packing retainer 16 is screwed to the plug 13 to keep the plug 13 and the operation member 14 airtight. The distal end portion 14a of the operation member 14 is formed in a cross shape in cross section, and four recesses 14b extending in the axial direction of the operation member 14 are formed between the crosses. The flow path area between the inner surface of the distal end portion 8a of the discharge passage 8 of the valve seat member 9 and the operation member 14 is increased by the concave portion 14b of the distal end portion 14a. An outer diameter of the cross-shaped outer end of the distal end portion 14a is formed to be slightly smaller than an inner diameter of the distal end portion 8a of the discharge passage 8. When the operation member 14 is advanced, the cross-shaped portion of the distal end portion 14a causes the discharge passage. 8 cleans the inner surface of the tip 8a.

  Drain flowing in from the inlet 5 accumulates in the valve chamber 4, and the float 11 rises and falls according to the liquid level and is seated on and off the valve seat member 9 to open and close 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 cleaning the foreign matter adhering to the inner end surface 8a of the discharge passage 8 and the valve chamber side end surface 9a of the valve seat member 9, the operating member 14 is screwed forward to advance the front end portion of the discharge passage 8 at the cross-shaped portion of the front end portion 14a. 8a Clean the inner surface. And the front-end | tip part 14a is protruded in the valve chamber 4, the float 11 is separated from the valve seat member 9, and the discharge channel | path 8 is opened. As a result, the gas in the valve chamber 4 is discharged to the outlet 7 at once while cleaning the foreign matter adhering to the valve chamber side end surface 9 a of the valve seat member 9.

Sectional drawing of the float type drain trap of this invention. The front view of the front end surface of the operation member of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 4 Valve chamber 5 Inlet 6,10 Outlet passage 7 Outlet 8 Outlet passage 8a Discharge passage front end 9 Valve seat member 9a Valve seat side end surface 11 of valve seat member Float 14 Operation member 14a End portion 14b of operation member Concave part at the tip of the operating member

Claims (1)

The valve casing forms an inlet, a valve chamber, and an outlet, a valve seat member is attached to the lower portion of the valve chamber, a discharge passage that communicates the valve chamber with the outlet side is formed in the valve seat member, and the valve seat member is separated from the valve seat member. A float that opens and closes the discharge passage is arranged, and an operation member that can be moved forward and backward from the outside is arranged in the discharge passage. A recess extending in the axial direction of the operation member is formed on the outer periphery of the operation member. A float type drain characterized in that the flow passage area between the inner surface of the discharge passage of the member and the operation member is increased, and when the operation member is advanced, the float is separated from the valve seat member to open the discharge passage. trap.

Images