JP5014764B2 - 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, 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 through the valve casing in the discharge passage, and the operation member is moved forward and backward to operate. The foreign matter adhering to the inner surface of the discharge passage of the valve seat member is cleaned at the circular section at the tip of the member.

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 end surface of the valve seat member on the valve chamber side 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 is arranged , a plug is connected to the valve casing on the same axis as the valve seat member, and an operation member that can be moved forward and backward from the outside penetrates the plug and the tip was placed in the exhaust passage, in which to clean the foreign matter adhering to the discharge passage the inner surface of the valve seat member at the distal end of the operating member caused to advance and retract the operating member, screw connection to the operating member in the plug, the operation The cross section of the tip of the member is formed in a polygonal shape, and when the operating member is advanced, the float is separated from the valve seat member to open the discharge passage.

According to the present invention, when the operating member is screw-coupled to the plug, and the cross section of the distal end portion of the operating member is formed into a polygon and the operating member is advanced, the inner surface of the discharge passage of the valve seat member and the distal end portion of the operating member are By opening a large flow path between the outer surface and the outer surface, it is possible to clean foreign matter adhering to the inner surface of the discharge passage of the valve seat member and cleaning foreign matter attached to the valve chamber side end surface of the valve seat member. It produces an excellent effect.

The float type drain trap of the present invention is configured such that the operating member is screwed to the plug, the cross section of the tip of the operating member is formed into a polygon, and the float is separated from the valve seat member when the operating member is advanced. It opens the discharge passage. That is, by forming the cross section of the tip of the operation member into a polygon, for example, the vertex of the polygon is positioned on the circle of the conventional circular section or slightly outside the circle. However, the flow path area between the inner surface of the discharge passage of the valve seat member and the outer surface of the operation member can be increased. 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. Then, the present invention opens the 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 moved forward, so that the gas in the valve chamber becomes the valve chamber side end surface of the valve seat member. It is discharged to the outlet at once while cleaning the foreign matter adhering to.

  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 has a cross section, for example, a quadrangle. The cross section can be formed in a polygon such as a triangle, pentagon, or hexagon. The apex of the polygon of the distal end portion 14a is located slightly inside the inner surface of the distal end portion 8a of the discharge passage 8, and the distal end portion of the discharge passage 8 is the polygonal portion of the distal end portion 14a when the operating member 14 is advanced. 8a Clean the inner surface. Further, when the operation member 14 is advanced, the float 11 is separated from the valve seat member 9 at the tip end portion 14a to open the discharge passage 8.

  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 of the valve seat member 9 and the valve chamber side end surface 9a, the operating member 14 is screwed forward to advance the front end portion of the discharge passage 8 at the polygonal 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 the Example of this invention. The front view which looked at the front-end | tip part of the operation member of FIG. 1 from the float side.

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 face 11 of valve seat member Float 14 Operation member 14a End portion of operation 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 sits and opens and closes the discharge passage is arranged , a plug is connected to the valve casing on the same axis as the valve seat member, and an operation member that can be moved forward and backward from the outside penetrates the plug and discharges the tip of the operation member arrangement and location within the passage, in which to clean the foreign matter adhering to the discharge passage the inner surface of the valve seat member at the distal end of the operating member caused to advance and retract the operating member, screw connection to the operating member in the plug, the tip portion of the operating member A float-type drain trap characterized in that the cross section is formed into a polygonal shape, and when the operating member is advanced, the float is separated from the valve seat member to open the discharge passage.

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