JP2001263589A - Steam trap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steam trap capable of preventing erosion of an outlet passage. SOLUTION: A casing of the steam trap is formed by fastening a covering member 5 to a main body 4 having an inlet 1, an outlet 2, and the outlet passage 3, and provided with a valve chamber 6 in the interior thereof. The inlet 1 and the outlet 2 open to upper parts of the main body 4. The inlet 4 communicates to an upper part of the valve chamber 6, and the outlet 2 communicates to an upper part of the outlet passage 3. A valve seat member 10, wherein a valve hole 8 opens to a valve chamber 6 side end and a branch holes 9 open to an outlet passage 3 side end, is provided on a lower part of the outlet passage 3, and the valve chamber 6 and the outlet passage 3 are communicated to each other. A condensate collecting portion 14 is connected below the outlet passage 6, and a mesh member 18 is inserted in the condensate collecting portion 14. The mesh member 18 is made by textiles or knitting of an erosion-resistant thin line of stainless steel and the like. The branch holes 9 of the valve seat member 10 is opened toward the condensate collecting portion 14. Discharged condensate is collided with the condensate in the condensate collecting portion 14, or collided with the mesh member to deviate. Therefore, the energy thereof is gradually attenuated, so that erosion of the outlet passage 3 can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam trap for automatically discharging condensed water generated in a steam piping system such as a steam transport pipe and a steam-using apparatus, and more particularly to erosion of an outlet passage caused by a high-speed flow of discharged condensed water. Related to what can be prevented.

[0002]

2. Description of the Related Art In a steam piping system, the occurrence of condensate is inevitable, and it is necessary to discharge the condensate generated appropriately to the outside of the system. A device that automatically discharges this condensate is a special valve called a steam trap.

[0003] The steam trap is of a mechanical type using a difference in specific gravity between steam and condensate, a thermodynamic type using a difference in thermodynamic characteristics between steam and condensate, and a temperature of steam and condensate according to the driving principle of a valve member. It is classified into a thermostatic type using the difference, etc., and its basic configuration is that a valve chamber with an inlet opening at the top and an outlet passage separated from this valve chamber and with an outlet opening at the top are formed in the casing. A valve member that opens and closes the valve hole by providing a valve seat member having a valve hole opened at the valve chamber side end and a branch hole opened at the outlet passage side end at a lower portion of the outlet passage to communicate the valve chamber and the outlet passage. It is arranged in the valve chamber. One example of this is disclosed in Japanese Patent Application Laid-Open No. Hei 10-2491.

[0004]

In the above-described conventional steam trap, the condensate discharged from the valve hole to the outlet passage through the branch hole at the time of valve opening flows down at a high speed while colliding with the inner wall of the outlet passage. In addition, there is a problem that the inner wall of the exit passage is eroded by the discharge condensate.

Accordingly, it is an object of the present invention to provide a steam trap which can prevent erosion of an outlet passage.

[0006]

Means for Solving the Problems The technical means of the present invention taken to solve the above technical problem is to provide a valve chamber having an inlet opened at an upper part, and an outlet separated from the valve chamber and having an outlet opened at an upper part. A valve seat member having a valve hole opened at the valve chamber side end and a branch hole opened at the outlet passage side end is provided at a lower portion of the outlet passage to communicate the valve chamber and the outlet passage, When the valve member that opens and closes the valve hole is disposed in the valve chamber, the condensate pool portion where the mesh member is arranged below the outlet passage is connected, and the branch hole of the valve seat member is opened toward the condensate pool portion. It is in the characteristic steam trap.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a condensate reservoir provided with a mesh member below an outlet passage is connected, and a branch hole of a valve seat member is opened toward the condensate reservoir. Therefore, the condensed water discharged from the valve hole to the outlet passage side when the valve is opened is gradually attenuated by its energy colliding with the condensed water in the condensate pool and by colliding with the mesh member and being deflected. Therefore, erosion of the outlet passage can be prevented.

[0008]

An embodiment showing a specific example of the above technical means will be described (see FIG. 1). This embodiment is applied to a free float steam trap. The casing of the free-float type steam trap is formed by fastening a lid member 5 to a main body 4 having an inlet 1, an outlet 2, and an outlet passage 3, and has a valve chamber 6 therein. The inlet 1 and the outlet 2 open coaxially at the upper part of the main body 4, the inlet 4 communicates with the upper part of the valve chamber 6, and the outlet 2 communicates with the upper part of the outlet passage 3. The valve chamber 6 and the outlet passage 3 are separated by a partition wall 7 formed integrally with the main body 4.

A valve seat member 1 having a valve hole 8 opened at the end of the valve chamber 6 and a branch hole 9 composed of a number of small holes opened at the end of the outlet passage 3.
0 is provided in the lower part of the outlet passage 3 to communicate the valve chamber 6 with the outlet passage 3. The total sectional area of the many small holes is formed larger than the sectional area of the valve hole 8. The valve seat member 10 is inserted into the partition wall 7 via a sealing member 11 for maintaining airtightness, and is fixed with a plug 13 via a holding member 12. A condensate pool 14 is connected below the outlet passage 6 and a bottom wall of the condensate pool 14 is plugged with a plug 15.
Then, the mesh member 18 is inserted into the condensate pool portion 14. The mesh member 18 is made of woven or knitted erosion-resistant fine wire such as stainless steel. The branch hole 9 of the valve seat member 10 is opened in the direction of the condensate reservoir 14. The valve seat member 10, the holding member 12 and the flag 15 are made of erosion resistant stainless steel.

A spherical float 16 as a valve means made of a stainless steel thin plate and hollow is accommodated in the valve chamber 6 in a free state. The outer surface of the spherical float 16 is directly attached to and detached from the valve seat member 10 to open and close the valve hole 8. At the lower end of the valve chamber 6, a float seat 17 for holding the spherical float 16 at a position where the spherical float 16 closes the valve hole 9 is formed.

The operation of the above-mentioned free float steam trap is as follows. The inlet 1 is connected to a condensate generation point such as a device using steam. The condensate and steam flow into the valve chamber 6, and the condensate separates and the steam separates and accumulates in the upper part.

The spherical float 16 rises and falls according to the liquid level in the valve chamber 6, and opens and closes the valve hole 8. When the valve hole 8 is opened, the condensate in the valve chamber 6 is conveyed to the valve hole 8, the branch hole 9, the condensate pool 1
4. Discharged to the outlet 2 through the outlet passage 3. At this time, the discharge condensate is decelerated by the branch holes 9 composed of a large number of small holes and dispersed at a gentle speed to the condensate sump 14, and by colliding with the condensate of the condensate sump 14, and By colliding and deflecting the member, its energy is gradually attenuated,
Erosion of the outlet passage 3 can be prevented. When the liquid level in the valve chamber 6 decreases due to the discharge of the condensate, the spherical float 1
6 moves down to close the valve hole 8.

In the above embodiment, a free-float type steam trap has been exemplified, but the present invention can be applied to a lever-float type, a free bucket type, a lever bucket type, a disk type and other types of steam traps.

[0014]

As described above, according to the present invention, a condensate pool in which a mesh member is disposed below the outlet passage is connected,
By opening the branch hole of the valve seat member toward the condensate reservoir, the energy of the condensate discharged from the valve hole to the outlet passage side at the time of opening the valve collides with the condensate in the condensate reservoir, and the mesh By colliding and deflecting the member, an excellent effect is obtained in that it is gradually attenuated and erosion of the outlet passage can be prevented.

[Brief description of the drawings]

FIG. 1 is a sectional view of a free-float type steam trap of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inlet 2 Outlet 3 Outlet passage 4 Main body 5 Lid member 6 Valve room 8 Valve hole 9 Branch hole 10 Valve seat member 14 Condensate reservoir 16 Spherical float 18 Mesh member

Claims (1)

[Claims] 1. A casing having a valve chamber having an inlet opened at an upper part and an outlet passage separated from the valve chamber and having an outlet opened at an upper part. A valve hole opens at a valve chamber side end and an outlet path side end. A valve seat member having a branch hole opened is provided at the lower part of the outlet passage to communicate the valve chamber and the outlet passage, and a valve member for opening and closing the valve hole is disposed in the valve chamber, and a mesh member is provided below the outlet passage. A steam trap, wherein the condensate pools arranged are connected, and a branch hole of the valve seat member is opened toward the condensate pool.