JP2012107654A - Disk type steam trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk type steam trap having a long service life without causing uneven wear on a valve disk.SOLUTION: A variable pressure chamber 3 is formed by fixing a lid 2 to a body 1 having an inlet 4 and an outlet 5. A jet hole 6 opened at the center of the variable pressure chamber 3 is provided to communicate between an inlet 4 and the variable pressure chamber 3. An annular groove 8 is formed on the outer circumference of a jet hole 6. While an inner ring valve seat 9 is formed between the jet hole 6 and annular groove 8, an outer ring valve seat 10 is formed on the outer circumference of the annular groove 8. A discharge hole 7 is provided from the annular groove 8 to communicate between the variable pressure chamber 3 and the outlet 5. A disk-like valve disk 11 which sits on or separates from the inner ring valve seat 9 and outer ring valve seat 10, is arranged in the variable pressure chamber 3. A guide rod 12 is attached to the lower part of the valve disk 11 and provided with a guide member 13 on the outer circumference thereof. In valve opening and closing of the valve disk 11, the inclination of the valve disk 11 is prevented through being guided by the guide member 13. As a result, the occurrence of uneven wear can be prevented.

Description

The present invention relates to a disc type steam trap that automatically discharges condensate as condensed water of steam generated in a steam piping system by opening and closing a valve disc in accordance with a pressure change in a variable pressure chamber.

A conventional disk-type steam trap is disclosed in, for example, Patent Document 1. This is because the lid body is fixed to the main body having an inlet and an outlet to form a variable pressure chamber inside, and an injection hole opening at the center of the variable pressure chamber is provided to connect the inlet and the variable pressure chamber. An annular groove that opens is formed, an inner ring valve seat is formed between the ejection hole and the annular groove, an outer ring valve seat is formed on the outer periphery of the annular groove, a discharge hole is provided from the annular groove, and the variable pressure chamber and the outlet are provided. Communicating with a disc-shaped valve disc that is attached to and detached from the inner ring valve seat and the outer ring valve seat in the variable pressure chamber, a seal ring that slides on the outer peripheral wall of the jet hole is placed in the jet hole, and the seal ring is Even if the valve disk is curved upwardly when the valve is closed, the seal disk slides on the outer peripheral wall of the ejection hole so that the valve disk The outer ring valve seat and the seal ring can be in close contact with each other, and the pressure in the variable pressure chamber decreases to the specified valve opening pressure. Karaben disk is to open the valve unseated from the outer ring valve seat and the seal ring.

JP 2003-28388 A

The above-mentioned conventional disc type steam trap cannot be opened / closed while maintaining a horizontal state when the valve disc opens / closes, and the valve disc is inclined and seated away from the valve seat. There is a problem in that the lower surface of the valve disk is worn away and the life as a trap is shortened.

Therefore, the problem to be solved by the present invention is to provide a disk-type steam trap having a long life without causing uneven wear on the valve disk.

In order to solve the above-mentioned problems, the disc type steam trap of the present invention has a lid body fixed to a main body having an inlet and an outlet to form a variable pressure chamber therein, and an ejection hole opened at the center of the variable pressure chamber is provided. An annular groove is formed in the outer periphery of the ejection hole by connecting the inlet and the variable pressure chamber, and an inner ring valve seat is formed between the ejection hole and the annular groove, and an outer ring valve seat is formed on the outer periphery of the annular groove. In addition, a disk-shaped valve disk that is provided in the variable pressure chamber with a discharge hole from the annular groove to connect the variable pressure chamber and the outlet and that is attached to and detached from the inner ring valve seat and the outer ring valve seat is guided to the lower surface of the valve disk. The rod is mounted integrally with the valve disk, and a guide member for guiding the vertical movement of the guide rod is provided on the outer periphery of the guide rod, and the temperature-sensitive magnetic material is provided on the lower end surface of the guide rod and the bottom surface of the guide member, respectively. Attach the magnets manufactured in step 1 Arranged such pole faces are the same, is obtained by arranging the guide rod and the guide member to the ejection hole.

According to the present invention, a guide rod is attached to the lower surface of the valve disc integrally with the valve disc, and a guide member for guiding the vertical movement of the guide rod is provided on the outer periphery of the guide rod, thereby opening and closing the valve disc. When valved, the guide rod is guided by the guide member to prevent the disc valve from tilting, and the valve disc can be seated on and off from the valve seat in a horizontal state to prevent uneven wear of the valve disc. There is an excellent effect that a long-life trap can be obtained.

It is sectional drawing of the disk type steam trap concerning embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to FIG. A lid 2 is screwed to the main body 1 to form a variable pressure chamber 3 therein. An inlet 4 and an outlet 5 are formed on the main body 1 on substantially the same axis. The main body 1 is provided with a jet hole 6 that opens at the center of the variable pressure chamber 3, and the inlet 4 and the variable pressure chamber 3 are communicated with each other through the jet hole 6. An annular groove 8 is provided on the outer periphery of the ejection hole 6, an annular inner ring valve seat 9 is formed between the ejection hole 6 and the annular groove 8, and an annular ring concentric with the inner ring valve seat 9 is formed on the outer periphery of the annular groove 8. The outer ring valve seat 10 is formed. The lower end of the annular groove 8 is communicated with the outlet 5 through the discharge hole 7. A disc-shaped valve disk 11 that opens and closes to the inner ring valve seat 9 and the outer ring valve seat 10 to open and close is disposed in the variable pressure chamber 3.

A guide rod 12 is attached to the lower surface of the valve disk 11 integrally with the valve disk 11. Therefore, if the valve disk 11 moves up and down, the guide rod 12 also moves up and down. The guide member 13 is attached to the outer periphery of the guide rod 12. The guide member 13 has a hole in the center that allows the guide rod 12 to slide up and down, and an upper and lower retaining ring in which the hole and the shaft are integrated between the outer periphery of the guide member 13 and the main body 1. 14 is fixed to the main body 1. Magnets 15 and 16 made of a temperature-sensitive magnetic material are attached to the lower end surface of the guide rod 12 and the bottom surface of the guide member 13, respectively, so that the magnetic poles of the joint surfaces of the plurality of magnets 15 and 16 are the same. .

The magnets 15 and 16 made of a temperature-sensitive magnetic material have a strong magnetic force at a low temperature and a weak magnetic force at a high temperature, and are arranged so that the magnetic poles of the joint surfaces of the magnets 15 and 16 are the same. The repulsive force is strong at low temperatures, while the repulsive force is weak at high temperatures. Due to such a strong repulsive force at low temperatures, the guide rod 12 and the valve disc 11 can be pushed up and forcedly opened when the disc type steam trap rises. When the low temperature condensate is eliminated by the forced valve opening, and then the high temperature condensate flows in, the repulsive force of the magnets 15 and 16 becomes weak and does not participate in the guide rod 12 and the valve disk 11.

The operation of the disc type steam trap will be described. When steam does not stay in the variable pressure chamber 3, the valve disk 11 is separated from the inner ring valve seat 9 and the outer ring valve seat 10 by the fluid pressure on the inlet 4 side acting on the valve disk 11 through the ejection hole 6. Then, the low-temperature condensate from the inlet 4 is discharged to the outlet 5 through the annular groove 8 and the discharge hole 7.

When the condensate is discharged and steam flows into the variable pressure chamber 3, the pressure in the variable pressure chamber 3 rises, and high-speed steam flows down the bottom surface of the valve disk 11 to reduce the static pressure. The valve disk 11 is seated on the inner ring valve seat 9 and the outer ring valve seat 10 and is closed. When the steam in the variable pressure chamber 3 condenses due to heat dissipation or the like and the steam pressure decreases, the valve disk 11 separates from the inner ring valve seat 9 and the outer ring valve seat 10 and opens. In the case of repeating the cycle of the on-off valve as described above, when the valve disc 11 moves in the vertical direction, the guide rod 12 attached integrally with the valve disc 11 is guided by the guide member 13, whereby the valve disc 11 By maintaining the horizontal state without tilting, the seating surfaces of the valve disk 11 on the inner and outer ring valve seats 9 and 10 do not wear unevenly.

The present invention can be used for a disk-type steam trap that automatically discharges condensate generated in a steam piping system.

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Transformer chamber 4 Inlet 5 Outlet 6 Ejection hole 7 Discharge hole 8 Annular groove 9 Inner ring valve seat 10 Outer ring valve seat 11 Valve disk 12 Guide rod 13 Guide member 14 Retaining rings 15, 16 Magnet

Claims (1)

A lid is fixed to the main body having an inlet and an outlet to form a variable pressure chamber inside, and an injection hole that opens at the center of the variable pressure chamber is provided so that the inlet and the variable pressure chamber communicate with each other. A groove is provided to form an inner ring valve seat between the ejection hole and the annular groove, an outer ring valve seat is formed around the outer periphery of the annular groove, a discharge hole is provided from the annular groove, and the variable pressure chamber communicates with the outlet. A disk-shaped valve disc that is attached to and detached from the inner ring valve seat and the outer ring valve seat is arranged in the transformer chamber.A guide rod is attached to the lower surface of the valve disc integrally with the valve disc. A guide member for guiding the movement is provided on the outer periphery of the guide rod, and magnets made of a temperature-sensitive magnetic material are attached to the lower end surface of the guide rod and the bottom surface of the guide member, respectively, so that the magnetic poles of the joint surfaces of the plurality of magnets are Arrange the guide members and guide rods so that they are the same. Disc type steam trap, characterized in that arranged in.

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