JP4879601B2 - Float type steam trap - Google Patents

Description

  The present invention relates to a float type steam trap that opens and closes a valve port by floating and lowering of a float, and particularly relates to a type that can discharge a large amount of condensate at low pressure.

  Float type steam traps are automatic valves that are attached to steam-using equipment and steam pipes and discharge condensate. However, when steam starts to be used, the equipment and pipes are cold, so a large amount of condensate is generated and used. It is a general usage method that the amount of condensate significantly decreases when the state enters a steady state. Therefore, conventionally, a low-pressure, large-capacity float type steam trap disclosed in Japanese Patent Laid-Open No. 1-131397 has been used. This is achieved by connecting a plurality of valve openings that open to the condensate reservoir connected to the inlet to the same outlet passage that communicates with the outlet. The opening is opened and closed, at least one valve opening is sized so that the corresponding float can be opened over the entire operating pressure range, and the other valve opening is in a predetermined low pressure range. It is formed in such a size that only the valve can be opened, and a closed float and an open bucket float are used as a plurality of floats.

Since the conventional float type steam trap uses an open bucket float, an introduction pipe for introducing a fluid into the open bucket float and a launch pad for holding the lowered open bucket float in a predetermined posture Etc., and the structure is complicated.
JP-A-6-241396

  The problem to be solved is to provide a float steam trap with a simple structure and a large capacity at low pressure.

The means of the present invention devised to solve the above-mentioned problem is that a valve port that opens to a condensate reservoir connected to the inlet is connected to an outlet passage that communicates with the outlet, and a float is connected to the condensate reservoir in the chamber. A float type steam trap that is floated and lowered to open and close the valve port. A plurality of float type steam traps are arranged in parallel, and the valve port of at least one float type steam trap has a corresponding working pressure. over a range formed to a size that can be opened valve, the other float steam trap valve port is the corresponding float to form sized to open only at a predetermined low pressure range the inlet side of the pressure is a predetermined value is higher than the float remains maintaining the closed once closed, float steam tigers, characterized in that the formation of the respective float in a closed float In the flop.

  The present invention produces an excellent effect of providing a large-capacity float steam trap at a low pressure with a simple structure by opening and closing the valve ports of the respective float steam traps with sealed floats.

  The float type steam trap of the present invention has a plurality of float type steam traps arranged in parallel, and the valve port of at least one float type steam trap is formed in such a size that the corresponding float can be opened over the entire working pressure range. However, the other float type steam trap valve ports are formed in such a size that the corresponding float can be opened only within a predetermined low pressure range, and each float is formed by a closed float. When used, the introduction tube and launch pad can be dispensed with, and the structure can be simplified.

  An embodiment showing a specific example of the above technical means will be described (see FIG. 1). In the float type steam trap A, a lid 2 is fastened to a main body 1 with a bolt (not shown) to form a valve casing, and a condensate reservoir 3 is formed inside. An inlet 4 is opened at the top of the condensate reservoir 3 and an outlet 5 is formed on the same axis as the inlet 4. The valve seat member 9 is inserted into the main body 1 from the valve seat mounting port 8 and is held by a plug 10 that closes the valve seat mounting port 8. The valve seat member 9 has a valve port 11 that allows the condensate reservoir 3 to communicate with the outlet 5, and the condensate reservoir 3 communicates with the outlet 5 from the valve port 11 through the outlet passage 12. A closed hollow spherical float 13 that opens and closes the valve port 11 is accommodated in the condensate reservoir 3 in a free state, and the valve port 11 is formed in a size that allows the corresponding float 13 to open over the entire pressure range. . A float seat 14 that defines the lowering position of the float 13 is formed on the bottom wall of the main body 1.

  In the float type steam trap B, a lid 22 is fastened to a main body 21 with a bolt (not shown) to constitute a valve casing, and a condensate reservoir 23 is formed inside. An inlet 24 is opened at the top of the condensate reservoir 23 and an outlet 25 is formed on the same axis as the inlet 24. A valve seat member 29 is inserted into the main body 21 from the valve seat mounting port 28 and held by a plug 30 that closes the valve seat mounting port 28. The valve seat member 29 has a valve port 31 that allows the condensate reservoir 23 to communicate with the outlet 25, and the condensate reservoir 23 communicates with the outlet 25 from the valve port 31 through the outlet passage 32. A closed hollow spherical float 33 that opens and closes the valve port 31 is accommodated in the condensate reservoir 23 in a free state, and the valve port 31 is formed in such a size that the corresponding float 33 can be opened only within a predetermined low pressure range. To do. A float seat 34 that defines the lowering position of the float 33 is formed on the bottom wall of the main body 31.

  The inlet pipe 41 is bifurcated, the float steam trap A is connected to the inlet pipe 41a, the float steam trap B is connected to the inlet pipe 41b, and the float steam trap A and the float steam are connected to the inlet pipe 41. Trap B is arranged in parallel.

  The condensate / steam mixed fluid flowing through the inlet pipe 41 is divided into the inlet pipe 41a and the inlet pipe 42b and flows down from the inlet 4 of the float steam trap A to the condensate reservoir 3 and at the inlet 24 of the float steam trap B. Flows into the condensate reservoir 23. When the pressure on the inlet pipe 41 side is lower than a predetermined value, when the condensate flows down, the float 13 of the float type steam trap A floats, separates from the valve seat member 9, opens the valve port 11, Condensate is discharged from the outlet passage 12 to the outlet 5. Further, the float 33 of the float type steam trap B floats up, leaves the valve seat member 29, opens the valve port 31, and discharges condensate from the outlet passage 32 to the outlet 25. When the pressure on the inlet pipe 41 side is higher than a predetermined value, once the float 33 of the float type steam trap B is closed, it cannot be separated from the valve seat member 29 due to the pressure difference between the front and rear of the valve port 31, and the valve is kept closed. It remains. On the other hand, the float 13 of the float type steam trap A floats when condensate flows in from the inlet 4, leaves the valve seat member 9 to open the valve port 11, and condensate is discharged from the outlet passage 12. Discharge to outlet 5.

Sectional drawing of the float type steam trap of this invention.

Explanation of symbols

A, B Float type steam trap 1,21 Main body 2,22 Lid 3,23 Condensate reservoir 4,24 Inlet 5,25 Outlet 9,29 Valve seat member 11,31 Valve port 12,32 Outlet passage 13,33 Float 41, 41a, 41b Inlet piping

Claims (1)

Float steam that connects the valve port that opens to the condensate reservoir connected to the inlet to the outlet passage that communicates with the outlet, and accommodates the float in the condensate reservoir so that it floats down and opens and closes the valve port In the trap, a plurality of float type steam traps are arranged in parallel, and the valve port of at least one float type steam trap is formed so that the corresponding float can be opened over the entire working pressure range. When the pressure on the inlet side is higher than the predetermined value, the float remains closed once the corresponding float is formed so that the corresponding float can be opened only in a predetermined low pressure range. , and the float steam trap, characterized in that the formation of the respective float in a closed float.

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