JP4833091B2 - Thermally responsive steam trap - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat sensitive steam trap in which a cleaning member arranged so as to be penetrated through a valve hole is not caught between a valve member and a valve seat member. <P>SOLUTION: An inlet 2, a valve chest 4 and an outlet 3 are formed by a casing comprising a body 1 and a lid member 5. The valve seat member 7 having the valve hole 6 is arranged between the valve chest 4 and the outlet 5. A temperature controller element 8 comprising a wall member 10, a diaphragm member 13, an expansion medium 14 sealingly provided between both members and a valve member 15 connected to the valve seat member 7 side of the diaphragm 13 is arranged in the valve chest 4. An annular projection 25 is formed at the valve seat member 7 side of the valve member 15, and a valve surface 26 separating from and seating on the valve seat member 7 is formed on a distal end. A universal joint comprising a ball receiving member 22 fixed to the annular projection 25 and a ball member 23 rotatably fitted to the ball receiving member 22 is arranged in the annular projection 25 of the valve member 15. The cleaning member 24 penetrating through the valve hole 6 of the valve seat member 7 is connected to the ball member 23 of the universal joint. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a thermally responsive steam trap that automatically discharges condensate generated in various steam-using devices and steam pipes using a temperature control element that includes a medium that is heated, expanded, cooled, and contracted. In particular, the present invention relates to a metal ion that is prevented from being deposited on the surface of the valve hole of the valve seat member and closing the valve hole.

  A conventional thermally responsive steam trap will be described with reference to JP-A-9-303686. In this case, a valve seat member having a valve hole that communicates the valve chamber with the outlet side is formed between the valve chamber and the outlet, and a wall member, a diaphragm member, and both members are formed in the casing. A temperature control element comprising an expansion medium sealed between the valve member and a valve member connected to the valve seat side of the diaphragm member is disposed in the valve chamber, and an annular protrusion is formed on the valve seat member side of the valve member. A valve face that is attached to and detached from the valve seat member is formed at the tip of the valve. An orifice hole with a smaller opening area than the valve hole is formed on the downstream side of the valve hole, and a part of the orifice hole is positioned at the upper end of the orifice hole. The moving member is disposed through the orifice hole.

By forming an orifice hole with a small opening area on the downstream side of the valve hole, keeping the pressure of the valve hole at a high pressure close to the pressure on the upstream side, and slowly letting the condensate flow down the surface of the valve hole Prevents metal ions from adhering to the surface. Condensate flows at high speed through the orifice hole, and metal ions adhere to the surface of the orifice hole. Metal ions adhering to the surface of the orifice hole are removed by a rolling member that rolls with the condensate flow. is there. However, since this conventional thermally responsive steam trap is formed with an orifice hole having a small opening area on the downstream side of the valve hole, there is a problem that the discharge flow rate of the condensate decreases. In order not to reduce the condensate discharge flow rate, an orifice hole is not formed on the downstream side of the valve hole, and a rolling member penetrating the valve hole is provided to remove metal ions adhering to the surface of the valve hole. When the valve member is seated on the valve seat member, there is a problem that the rolling member is sandwiched between the valve member and the seating is prevented or deformed and damaged.
JP-A-9-303686

  The problem to be solved is to provide a thermally responsive steam trap in which a cleaning member disposed through the valve hole to remove metal ions adhering to the valve hole is not sandwiched between the valve member and the valve seat member. Is to provide.

  In the thermally responsive steam trap of the present invention, a valve seat member having a valve hole that communicates the valve chamber with the outlet side is formed between the valve chamber and the outlet. A temperature control element comprising a member, a diaphragm member, an expansion medium sealed between both members, and a valve member connected to the valve seat member side of the diaphragm member is disposed in the valve chamber, and is annularly provided on the valve seat member side of the valve member A protrusion is formed and a valve face is formed on the tip of the annular protrusion to be attached to and detached from the valve seat member. The ball receiving member fixed to the annular protrusion and the ball receiving member are rotatably fitted in the annular protrusion of the valve member. The universal joint which consists of a caulking ball member is arrange | positioned, The cleaning member which penetrates the valve hole of a valve seat member was connected with the ball member of the universal joint, It is characterized by the above-mentioned.

  In the present invention, the universal joint is disposed in the annular protrusion of the valve member, and the cleaning member is connected to the universal joint. Therefore, the cleaning member is deformed and damaged without being sandwiched between the valve member and the valve seat member. This produces an excellent effect.

  The thermally responsive steam trap according to the present invention includes a universal joint including a ball receiving member fixed to the annular protrusion and a ball member rotatably fitted to the ball receiving member in the annular protrusion of the valve member. The cleaning member penetrating the valve hole of the member is connected to the ball member of the universal joint. That is, since the cleaning member is displaced in the axial direction of the valve hole while being inclined in all directions along with the seating of the valve member on the valve seat member, the cleaning member is not sandwiched between the valve member and the valve seat member, and in all directions. The metal ions adhering to the surface of the valve hole are removed by inclining.

  An embodiment showing a specific example of the above technical means will be described (see FIGS. 1 and 2). An inlet 2 and an outlet 3 are formed on the same axis on the main body 1, and a valve chamber 4 communicating with the inlet 2 and the outlet 3 is formed by a lid member 5 screwed to the main body 1. A casing is formed by the main body 1 and the lid member 5. A valve seat member 7 having a valve hole 6 communicating with the valve chamber 4 and the outlet 3 is screwed to an opening end of the outlet 3 on the valve chamber 4 side. A temperature control element 8 is disposed above the valve seat member 7. The temperature control element 8 includes an upper wall member 10 having an inlet 9, a plug member 11 that seals the inlet 9, a diaphragm member 13 that forms a storage chamber 12 between the upper wall member 10, and a storage chamber 12, an expansion medium 14 that is sealed to the diaphragm 12, a valve member 15 that is fixedly attached to the diaphragm member 13 and opens and closes the valve hole 6, and an outer peripheral edge of the diaphragm member 13 between the upper wall member 10. And a lower wall member 16 fixed between the two. The expansion medium 14 is formed of water, a liquid having a lower boiling point than water, or a mixture thereof.

  An annular protrusion 25 is formed on the valve seat member 7 side of the valve member 15, and a valve surface 26 that is attached to and detached from the valve seat member 7 is formed at the tip of the annular protrusion 25. The ball receiving member 22 is fixed in the annular protrusion 25 of the valve member 15, and the ball member 23 is fitted to the ball receiving member 22 so as to be rotatable. A universal joint is formed from the ball receiving member 22 and the ball member 23. A cleaning member 24 penetrating the valve hole 6 of the valve seat member 7 is connected to the ball member 23 of the universal joint. The cleaning member 24 is formed of two elongated bars, and the upper ends of the cleaning members 24 are fixed to the ball member 23 of the universal joint.

  The temperature control element 8 is accommodated in a bottomed cylindrical mounting member 17 sandwiched and fixed between the main body 1 and the valve seat member 7, and is disposed between the lid member 5 and the temperature control element 8. The outer peripheral lower surface of the lower wall member 16 is held in contact with the step portion 19 of the mounting member 17 by the biasing force of the coil spring 18. The attachment member 17 has a fluid passage hole 20 in the bottom wall and three fluid passage windows 21 in the peripheral wall.

  The operation in this embodiment is as follows. At the time of starting, the inside of the valve chamber 4 is at a low temperature, the expansion medium 14 is contracted, the diaphragm member 13 is displaced upward, and the valve member 15 is separated from the valve seat member 7 to open the valve hole 6. As a result, low-temperature condensate and air flowing from the inlet 2 are discharged from the valve hole 6 to the outlet 3. When the temperature of the fluid flowing in from the inlet 2 rises due to the discharge of the low temperature fluid and the inside of the valve chamber 4 reaches a predetermined temperature or more, the expansion medium 14 expands, the diaphragm member 13 is displaced downward, and the valve member 15 becomes the valve seat member. 7 is seated and the valve hole 6 is closed. This prevents steam leakage. When the inside of the valve chamber 4 falls below a predetermined temperature due to heat radiation, the expansion medium 14 contracts, the diaphragm member 13 is displaced upward, and the valve member 15 is separated from the valve seat member 7 to open the valve hole 6. The cleaning member 24 is displaced in the axial direction of the valve hole 6 while being inclined in all directions together with the seat of the valve member 15 on the valve seat member 7, and removes metal ions adhering to the surface of the valve hole 6.

Sectional drawing of the thermally responsive steam trap of the Example of this invention. The expanded sectional view of the valve member and valve seat member part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Inlet 3 Outlet 4 Valve chamber 5 Lid member 6 Valve hole 7 Valve seat member 8 Temperature control element 13 Diaphragm member 14 Expansion medium 15 Valve member 22 Ball receiving member 23 Ball member 24 Cleaning member 25 Annular protrusion 26 Valve surface

Claims (1)

An inlet, a valve chamber and an outlet are formed in the casing, a valve seat member having a valve hole communicating with the valve chamber on the outlet side is disposed between the valve chamber and the outlet, and the wall member, the diaphragm member, and both members A temperature control element comprising a sealed expansion medium and a valve member connected to the valve seat member side of the diaphragm member is disposed in the valve chamber, and an annular protrusion is formed on the valve seat member side of the valve member to form a tip of the annular protrusion. A universal joint composed of a ball receiving member fixed to the annular protrusion in the annular protrusion of the valve member and a ball member rotatably fitted to the ball receiving member in a valve surface that is separated from and seated on the valve seat member. A thermally responsive steam trap, characterized in that a cleaning member disposed and penetrating a valve hole of a valve seat member is connected to a ball member of a universal joint.

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