JP5160287B2 - Disc type steam trap - Google Patents

Description

  The present invention relates to a disk-type steam trap that automatically discharges condensate generated in a steam piping system by opening and closing a valve disk in response to a pressure change in a variable pressure chamber, that is, a thermodynamic steam chamber. It relates to the one that forms a warm room that keeps the variable temperature room outside.

  Japanese Patent Application Laid-Open No. 2000-28091 discloses a disk-type steam trap in which a temperature-retaining room for keeping a temperature-reducing room is formed outside the above-described room. This is because a lid member is attached to a main body having an inlet and an outlet via a valve seat member, a variable pressure chamber is formed between the valve seat member and the lid member, a valve disk is disposed in the variable pressure chamber, and the valve seat member is transformed. An inlet passage that opens to the center of the chamber and communicates from the inlet side, an annular groove that opens to the outer periphery of the inlet passage, an inner ring valve seat formed between the inlet passage and the annular groove, and an outer periphery of the annular groove It has an outer ring valve seat, an outlet passage with one end opened to the annular groove and the other end opened to the outlet, a cap member is attached to the main body to form a warming chamber outside the variable pressure chamber, one end opened to the outlet, etc. It has a heat insulation connecting hole that opens to the heat insulation chamber, and keeps the temperature of the variable pressure room by discharging condensate by allowing a part of the condensate discharged by opening the valve disk to flow into the heat insulation chamber. is there.

However, the above-described disc type steam trap has a problem that the heat insulation efficiency of the variable pressure chamber is poor because the discharged condensate does not easily flow into the heat storage chamber.
JP 2000-28091 A

  The problem to be solved is to provide a disk-type steam trap that makes it easy for the discharged condensate to flow into the heat-retaining room and has good heat-retaining efficiency in the variable pressure room.

The disc-type steam trap of the present invention has a lid member attached to a main body having an inlet and an outlet via a valve seat member to form a variable pressure chamber between the valve seat member and the lid member, and a valve disc is arranged in the variable pressure chamber. A valve seat member that opens to the center of the variable pressure chamber and communicates from the inlet side, an annular groove that opens to the outer periphery of the inlet passage, an inner ring valve seat that is formed between the inlet passage and the annular groove, and an annular groove The outer ring valve seat formed on the outer periphery of the outer ring and the outlet passage having one end opened to the annular groove, the cap member being attached to the main body, and a warming chamber formed outside the variable pressure chamber, the fluid passage area of the outlet passage A communication hole that has a smaller fluid passage area and communicates the other end of the outlet passage to the outlet is formed in the valve seat member, the communication passage side end of the outlet passage is directly communicated to the outlet passage side end of the communication hole, and one end is the outlet A heat insulation connecting hole that opens in the passage and the other end opens in the thermal insulation room is provided. One end is open and the other end to incubated chamber, characterized in that a heat insulating circulation holes opening to the outlet.

In the present invention, the valve passage member is formed with a communication hole having a fluid passage area smaller than the fluid passage area of the outlet passage and communicating the other end of the outlet passage to the outlet, and the communication hole side end of the outlet passage is the outlet passage of the communication hole. It has a heat retaining connection hole that communicates directly with the side end, opens at one end to the outlet passage, and opens at the other end to the warming chamber, and has a heat retaining circulation hole at one end that opens at the warming chamber and the other end opens at the outlet. As a result, a part of the condensate discharged by opening the valve disk can be easily flown into the heat-retaining room, and an excellent effect of providing a disk-type steam trap with good heat-retaining efficiency in the transformer room. Produce.

In the disc type steam trap of the present invention, the valve passage member is formed with a communication hole having a fluid passage area smaller than the fluid passage area of the outlet passage and communicating the other end of the outlet passage to the outlet. A heat retaining circulation hole that directly communicates with the end of the communication hole on the outlet passage side, has one end opened to the outlet passage and the other end opened to the warming chamber, one end opened to the warming chamber, and the other end opened to the outlet Therefore, the fluid passage area of the outlet passage is narrowed on the outlet side than the outlet passage side opening end of the heat retaining connection hole. Therefore, a part of the condensate discharged by opening the valve disk is discharged from the heat retaining connection hole to the outlet through the heat retaining chamber. Therefore, the discharged condensate can be easily flown into the heat-retaining room, and a disk-type steam trap with good heat-retaining efficiency in the transformer room can be provided.

  An embodiment showing a specific example of the above technical means will be described (see FIG. 1). FIG. 1 is a sectional view of a disk type steam trap according to an embodiment of the present invention. A lid member 5 is screwed to a main body 3 having an inlet 1 and an outlet 2 via a valve seat member 4 to form a variable pressure chamber 6 between the valve seat member 4 and the lid member 5. A disk-shaped valve disk 9 is arranged in the variable pressure chamber 6 so as to be opened and closed by being seated on and off the inner ring valve seat 7 and the outer ring valve seat 8 described below. The inlet 2 and the outlet 3 are formed on substantially the same axis.

  The valve seat member 4 communicates from the inlet 1 side and opens to the center of the variable pressure chamber 6, an annular groove 16 that opens to the outer periphery of the inlet passage 15, and between the inlet passage 15 and the annular groove 16. The formed inner ring valve seat 7, the outer ring valve seat 8 concentrically formed on the outer periphery of the annular groove 16 and in the same plane, the outlet passage 17 whose one end opens into the annular groove 16, and the outlet passage 17 The fluid passage area is smaller than the fluid passage area, and a communication hole 19 is provided for communicating the other end of the outlet passage 17 and the outlet 2. A cap member 20 is screwed to the main body 3 to form a warming chamber 21 outside the variable pressure chamber 6. A heat retaining connection hole 22 having one end opened to the outlet passage 17 and the other end opened to the heat retaining chamber 21 is provided from the valve seat member 4 through the main body 3. The main body 3 is provided with a heat-retaining circulation hole 23 having one end opened to the heat retaining chamber 21 and the other end opened to the outlet annular groove 24 at the valve seat member 4 side end of the outlet 2.

  The operation of the above embodiment will be described. The valve disc 9 is opened from the inner and outer ring valve seats 7 and 8 by the fluid pressure on the inlet 1 acting on the valve disc 9 via the inlet passage 15, and condensate is communicated with the annular groove 16, the outlet passage 17, and the communication. Discharge to outlet 2 through hole 19. As the condensate is discharged and steam passes between the inner and outer ring valve seats 7 and 8 and the valve disk 9 at a high speed, the pressure between the inner and outer ring valve seats 7 and 8 and the valve disk 9 decreases, By flowing into the variable pressure chamber 6 and increasing the pressure in the variable pressure chamber 6, the valve disk 9 is seated and closed on the inner and outer ring valve seats 7,8. When the steam in the variable pressure chamber 6 condenses due to heat dissipation or the like and the steam pressure decreases, the valve disk 9 opens from the inner and outer ring valve seats 7 and 8. Such an on-off valve cycle is repeated.

  The valve seat member 4 is formed with a communication hole 19 having a smaller fluid passage area than the fluid passage area of the outlet passage 17 and communicating the other end of the outlet passage 17 to the outlet 2. One end is opened to the outlet passage 17 and the other end is kept warm. Since the heat retaining connecting hole 22 opened in the chamber 21 is provided, and the heat circulating circulation hole 23 having one end opened in the heat retaining chamber 21 and the other end opened in the outlet 2 is provided, the fluid passage area of the outlet passage 17 is kept warm. The hole 22 is narrowed on the outlet 2 side from the opening end on the outlet passage 17 side. Therefore, a part of the condensate discharged by opening the valve disk 9 is discharged from the heat retaining connection hole 22 through the heat retaining chamber 21 to the outlet 2 from the heat retaining circulation hole 23, and the discharged condensate easily flows into the heat retaining chamber 21. It is possible to increase the heat insulation efficiency of the variable pressure chamber 6.

Sectional drawing of the disk type steam trap of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inlet 2 Outlet 3 Main body 4 Valve seat member 5 Lid member 6 Transformer chamber 7 Inner ring valve seat 8 Outer ring valve seat 9 Valve disk 15 Inlet passage 16 Annular groove 17 Outlet passage 19 Communication hole 20 Cap member 21 Insulation chamber 22 Insulation port 23 Thermal insulation circulation hole 24 Exit annular groove

Claims (1)

A lid member is attached to the main body having an inlet and an outlet via a valve seat member to form a variable pressure chamber between the valve seat member and the lid member, a valve disk is disposed in the variable pressure chamber, and the valve seat member is the center of the variable pressure chamber. An inlet passage that opens to the inlet side and communicates from the inlet side, an annular groove that opens to the outer periphery of the inlet passage, an inner ring valve seat that is formed between the inlet passage and the annular groove, and an outer ring valve seat that is formed on the outer periphery of the annular groove And an outlet passage having one end opened in the annular groove, and a cap member attached to the main body to form a temperature-retaining chamber outside the variable pressure chamber, the outlet passage has a smaller fluid passage area than the fluid passage area of the outlet passage. A communication hole that communicates the other end of the outlet passage to the outlet is formed in the valve seat member, the communication hole side end of the outlet passage communicates directly with the outlet passage side end of the communication hole, one end opens into the outlet passage, and the other end A heat retaining connection hole is opened at one end, one end is open to the warming chamber and the other end is open to the outlet. Disc type steam trap, characterized in that a heat insulating circulation holes.

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