JP4209698B2 - Float type steam trap - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention automatically utilizes the difference in specific gravity between gas and liquid to automatically condense condensate generated in the steam piping system by opening or closing the valve port by driving the valve member directly with the float accommodated in the valve chamber. Float type steam trap to be discharged. The basic structure of the float steam trap is that the valve casing forms the inlet, the valve chamber, and the outlet, and the valve port that connects the valve chamber and the outlet is formed in the lower part of the valve chamber. The valve is opened and closed by driving the member. In this float-type steam trap, the discharged condensate re-evaporates at the valve port, causing the valve port to flow down at a high speed, causing erosion on the inner wall of the valve port, or dissolving metal ions in the fluid on the inner wall of the valve port. There was a problem of being stuck and gradually accumulating.
[0002]
[Prior art]
[Patent Document 1]
JP 2002-372190 A
In order to solve this problem, a technique disclosed in Japanese Patent Application Laid-Open No. 2002-372190 has been used. In this example, a plurality of float steam traps are arranged in series, and the outlet of the float steam trap in the front row is connected to the inlet of the float steam trap in the rear row.
[0003]
[Problems to be solved by the invention]
In the above-mentioned conventional type, the pressure at the valve mouth of the float steam trap in the front row is kept almost the same as the internal pressure of the float steam trap in the back row, so that there is no sudden pressure drop. The re-evaporation of the condensate flowing down the valve port can be reduced, and the condensate whose temperature has dropped due to the heat released from the float steam trap in the rear row flows down to the valve port of the rear row float steam trap. Re-evaporation of the condensate flowing down the valve mouth of the steam trap can be reduced. However, since the heat radiation from the float steam trap in the rear row is limited, the temperature drop of the condensate flowing down the valve port of the float steam trap in the rear row is insufficient, leaving room for improvement.
[0004]
Therefore, the technical problem of the present invention is to provide a float steam trap that can sufficiently prevent re-evaporation by sufficiently reducing the temperature of the condensate flowing down the valve port of the float steam trap in the rear row.
[0005]
[Means for Solving the Problems]
The technical means of the present invention taken in order to solve the above technical problem is that a plurality of float type steam traps are arranged in series, and the outlet of the float steam trap in the front row is connected to the inlet of the float type steam trap in the back row. , A radiator pipe is provided between the outlet of the float steam trap in the front row and the inlet of the float steam trap in the rear row, and the condensate discharged to the outlet of the float steam trap in the front row passes through the radiator pipe. The float steam trap is characterized in that it flows from the inlet of the float steam trap in the rear row .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides a radiator pipe between the outlet of the float steam trap in the front row and the inlet of the float steam trap in the rear row, and the condensate discharged to the outlet of the float steam trap in the front row passes through the radiator pipe in the rear row. since those flowing from the inlet of the float steam trap, the heat radiation tube and the rear row between the inlet of the outlet and the back row of the float steam trap of the valve port of the rear row of float steam trap front row float steam trap The condensate whose temperature has been sufficiently lowered flows down due to the heat radiation from the float type steam trap. Therefore, it is possible to reliably prevent the re-evaporation of the condensate flowing down the valve port of the float type steam trap in the rear row.
[0007]
【Example】
An embodiment showing a specific example of the above technical means will be described (see FIG. 1). A front row float steam trap 1 and a rear row float steam trap 2 are arranged in series via a T-shaped joint 3. The float steam trap 1 in the front row is formed by fastening a lid member 7 to a main body 6 having an inlet 4 and an outlet 5 to form a valve chamber therein, and a valve communicating the valve chamber and the outlet 5 with a float housed in the valve chamber. Open and close the mouth. The main body 6 has an inlet flange 8 and an outlet flange 9 for pipe connection. The thermoelectric generator 10 is fixed and attached to the lid member 7. The thermoelectric generator 10 generates an electromotive force due to a temperature difference between the high temperature on the float steam trap 1 side and the low temperature of the air on the opposite side.
[0008]
The T-shaped joint 3 has an inlet 30 and an outlet 31 on one axis, and a branch port 32 perpendicular to the inlet 30, and an inlet flange 33 and an outlet for connecting pipes to the inlet 30 and the outlet 31. A flange 34 is provided. The outlet flange 34 is formed by a flange that closes the outlet 31. The inlet flange 33 is connected to the outlet flange 9 of the float steam trap 1 in the front row. One end of a heat radiating tube 41 as a heat radiating portion is connected to the branch port 32 via a crimp joint 40. A part of the heat radiating tube 41 is formed in a coil shape in order to promote heat radiation.
[0009]
The float steam trap 2 in the rear row is formed by fastening a lid member 27 having an inlet 24 to a main body 26 having an outlet 25 to form a valve chamber therein, and a valve communicating with the valve chamber and the outlet by a float housed in the valve chamber. Open and close the mouth. The main body 26 has an inlet flange 28 and an outlet flange 29 for pipe connection. The inlet flange 28 is connected to the outlet flange 34 of the T-shaped joint 3. The other end of the heat radiating pipe 41 is connected to the inlet 24 via a crimp joint 42. The electric motor 21 is fixedly attached to the lid member 27, and the blower fan 22 that cools the heat radiating pipe 41 is connected to the electric motor 21. The electric motor 21 drives the blower fan 22 with the electromotive force of the thermoelectric generator 10.
[0010]
Next, the operation of the float type steam trap of this embodiment will be described. Condensate and steam flow into the valve chamber from the inlet 4 of the float steam trap 1 in the front row, and condensate accumulates in the lower part and steam in the upper part. When the liquid level rises, the buoyancy increases, so the float rises and opens the valve port, and the condensate in the valve chamber is discharged from the valve port to the outlet 5. When the liquid level in the valve chamber falls due to the discharge of condensate, the float descends with it and closes the valve port. Condensate discharged to the outlet 5 flows into the valve chamber from the inlet 24 of the float steam trap 2 in the rear row through the radiating pipe 41 from the T-shaped joint 3, and condensate is stored in the lower part while the steam is separated in the upper part. When the liquid level rises, the buoyancy increases. Therefore, the float rises, opens the valve port, and condensate in the valve chamber is discharged from the valve port to the outlet 25. When the liquid level in the valve chamber falls due to the discharge of condensate, the float descends with it and closes the valve port.
[0011]
The valve mouth of the float steam trap 1 in the front row is almost the same pressure as the internal pressure of the float steam trap 2 in the back row and does not cause a sudden pressure drop, so the condensate flowing down the valve mouth of the float steam trap 1 in the front row Can be reduced. In addition, the condensate having a sufficiently lowered temperature flows down to the valve opening of the float steam trap 2 in the rear row due to heat radiation from the heat radiating pipe 41, cooling by the blower fan 22, and heat radiation from the float steam trap 2 in the rear row. The re-evaporation of the condensate flowing down the valve port of the float steam trap 2 in the rear row can be reduced.
[0012]
【The invention's effect】
The present invention produces the following specific effects.
As described above, according to the present invention, a condenser is provided between the outlet of the float steam trap in the front row and the inlet of the float steam trap in the rear row, and the condensate discharged to the outlet of the float steam trap in the front row Flows through the radiator pipe from the inlet of the float steam trap in the rear row, so that the re-evaporation of the condensate flowing down the valve mouth of the float steam trap in the rear row can be reliably prevented. This produces an excellent effect of preventing deposition.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a float type steam trap according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Float type steam trap of the front row 2 Float type steam trap of the back row 3 T type joint 4, 24 Inlet 5, 25 Outlet 6, 26 Main body 7, 27 Lid member 10 Thermoelectric generation element 21 Electric motor 22 Blower fan 41 Radiation pipe

Claims (1)

Multiple float steam traps are arranged in series, and the outlet of the float steam trap in the front row is connected to the inlet of the float steam trap in the rear row. The outlet of the float steam trap in the front row and the float steam in the rear row A float steam trap, characterized in that a condenser pipe is provided between the trap inlet and the condensate discharged to the outlet of the float steam trap in the front row flows from the inlet of the float steam trap in the rear row through the radiator pipe. .

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