JP7370098B1 - Nozzle steam trap - Google Patents

Abstract

The present invention provides a nozzle-type steam trap that can suppress steam leakage and increase the amount of condensed water discharged. [Solution] The nozzle type steam trap of the present invention is connected to a condensed water storage pipe into which condensed water from a steam main pipe is introduced, and converts the condensed water into steam and discharges it to a discharge pipe. , an inlet flange connected to the condensate accumulation pipe, an outlet flange connected to the discharge pipe, an upstream chamber communicating with the inlet flange, a downstream chamber communicating with the outlet flange, an upstream chamber and a downstream chamber. a steam generation nozzle consisting of a first steam generation nozzle that communicates the upstream chamber and the intermediate chamber and a second steam generation nozzle that communicates the intermediate chamber and the downstream chamber, and an intermediate chamber that opens and closes the intermediate chamber, A cap that allows the steam generation nozzle to be replaced. [Selection diagram] Figure 4

Description

The present invention relates to a nozzle-type steam trap, and more particularly, to a nozzle-type steam trap that can automatically discharge condensed water in a steam pipe, has a large drainage capacity, and can suppress the discharge of steam.

The present applicant proposed a nozzle type condensed water discharge device in Patent Document 1. The steam generation nozzle has a length (L) of 20 to 40 mm and a hole (d) diameter of 0.2 to 18 mm, and accumulates condensed water generated in the steam main pipe in a condensed water storage pipe and converts it into steam. Continuously discharge outside. The holes in the steam generation nozzle are narrow, making it easy for condensed water to pass through but difficult for steam to pass through. Therefore, for example, when the steam main pipe is under high pressure, the diameter of the hole (d) is made smaller and the length (L) is made longer. On the other hand, the space inside the trap is limited due to installation space constraints, and the length (L) of the steam generation nozzle cannot be made very long. In other words, there is a limit to the length relative to the pore diameter. Therefore, it is necessary to arrange the steam generation nozzles in series to increase the effective length of the nozzle to reduce steam leakage, and to arrange the steam generation nozzles in parallel to improve condensed water discharge performance. .

Patent No. 5561632

An object of the present invention is to provide a nozzle-type steam trap that can suppress steam leakage and increase the amount of condensed water discharged.

The nozzle type steam trap according to the present invention is connected to a condensed water storage pipe into which condensed water is introduced from a steam main pipe, and converts the condensed water into steam and discharges the condensed water to a discharge pipe. an inlet flange connected to the storage pipe; an outlet flange connected to the discharge pipe; an upstream chamber communicating with the inlet flange; a downstream chamber communicating with the outlet flange; a steam generation nozzle consisting of an intermediate chamber connected to a downstream chamber, a first steam generation nozzle that communicates the upstream chamber and the intermediate chamber, and a second steam generation nozzle that communicates the intermediate chamber and the downstream chamber; It is characterized by comprising a cap that opens and closes the intermediate chamber to make the steam generation nozzle replaceable.

A hole diameter of the second steam generation nozzle on the intermediate chamber side is larger than a hole diameter of the first steam generation nozzle on the intermediate chamber side.

The steam generation nozzles are characterized in that they are composed of four nozzles in two series, two first steam generation nozzles and two second steam generation nozzles.

According to the nozzle type steam trap according to the present invention, since the first steam generating nozzle and the second steam generating nozzle are provided in two stages (two in one series), the length of the steam generating nozzle can be substantially increased. In other words, the hole length ratio (=L/d) can be substantially increased. The long nozzle length reduces steam leakage. Furthermore, since the pressure is reduced by the first steam generation nozzle in the first stage, highly accurate discharge can be performed by the second steam generation nozzle in the second stage.

Since the hole diameter on the intermediate chamber side of the second steam generation nozzle is made larger than the hole diameter on the intermediate chamber side of the first steam generation nozzle, condensed water can be efficiently discharged to the discharge pipe.

Since the steam generating nozzles are configured with two lines of four nozzles, more condensed water can be discharged than in the case of two lines of steam generating nozzles.

FIG. 3 is an explanatory diagram of a nozzle-type steam trap according to the present invention connected to a condensed water storage pipe; FIG. 1 is a front view of a nozzle-type steam trap according to the present invention. FIG. 1 is a plan view of a nozzle-type steam trap according to the present invention. FIG. 4 is a plan view of FIG. 3 with the cap removed. 5 is a sectional view taken along line BB in FIG. 4. FIG. 5 is a sectional view taken along line AA or taken along line CC in FIG. 4. FIG. It is a perspective view of a steam generation nozzle. FIG. 3 is a cross-sectional view showing different forms of the steam generation nozzle. FIG. 3 is a cross-sectional view specifically showing the operation of the steam generation nozzle. FIG. 3 is a cross-sectional view specifically showing the operation of the steam generation nozzle.

Hereinafter, the nozzle type steam trap of the present invention will be explained with reference to the drawings.

FIG. 1 is an explanatory diagram when a nozzle type steam trap 100 according to the present invention is connected to a condensate storage pipe 1. As shown in FIG. Condensed water 2 flows from the steam main into the condensed water storage pipe 1 and is stored therein. The condensed water 2 passes through the filter 4, passes through the discharge pipe 17, enters the nozzle type steam trap 100, and is discharged into the discharge pipe 18 as steam. The steam in the exhaust pipe 18 becomes condensed water again and is reused as boiler water. The drain valve 3 is a valve that opens when the water level in the condensed water storage pipe 1 exceeds an expected level. The pressure is high on the condensed water storage pipe 1 side, and is atmospheric pressure on the discharge pipe 17 side.

FIG. 2 is a front view of a nozzle-type steam trap 100 according to the present invention. The nozzle steam trap 100 includes an inlet flange 5, an outlet flange 6, and a main body 7. Condensed water enters through the inlet flange 5 and exits at the outlet flange 6. Inside the main body part 7, an upstream chamber 8 communicating with the inlet side flange 5, a downstream chamber 9 communicating with the outlet side flange 6, and an intermediate chamber 10 connected to the upstream chamber 8 and the downstream chamber 9 are provided. Be prepared. The intermediate chamber 10 is located between the upstream chamber 8 and the downstream chamber 9, and allows the upstream chamber 8 and the downstream chamber 9 to communicate with each other. The intermediate chamber 10 has a cylindrical shape and is provided with a cap 11. The cap 11 can open and close the intermediate chamber 10 by being attached to and detached from the intermediate chamber 10.

FIG. 3 is a plan view of the nozzle steam trap 100, and FIG. 4 is a plan view with the cap 11 removed. As shown in FIG. 4, when the cap 11 is removed, four steam generating nozzles 13 are exposed. The steam generation nozzles 13 were configured with four in two series, each consisting of two first steam generation nozzles 13a and 13b and two second steam generation nozzles 13c and 13d. In the intermediate chamber 10, first steam generation nozzles 13a, 13b and second steam generation nozzles 13c, 13d are removably provided. The steam generating nozzle 13 can be replaced by removing the cap 11 of the intermediate chamber 10. Instead of having the configuration as shown in FIG. 4, the steam generation nozzles 13 may have a configuration of two in one series, consisting of one first steam generation nozzle 13a and one second steam generation nozzle 13d. Moreover, two intermediate chambers 10 are provided in the vertical direction, and the first steam generating nozzle 13a and the second steam generating nozzle 13c are arranged in one intermediate chamber 10, and the first steam generating nozzle 13a and the second steam generating nozzle 13c are disposed in the other intermediate chamber. Two steam generation nozzles 13c may be arranged to realize a configuration of four nozzles in two series.

FIG. 5 is a sectional view taken along line BB in FIG. The main body portion 7 includes an upstream chamber 8, a downstream chamber 9, and an intermediate chamber 10 inside. The upstream chamber 8 and the downstream chamber 9 are separated by a partition wall 12. The intermediate chamber 10 is located above the upstream chamber 8 and the downstream chamber 9. The intermediate chamber 10 has a cylindrical shape and is provided with a cap 11.

FIG. 6 is a sectional view taken along line AA or line CC in FIG. The first steam generation nozzle 13a communicates the upstream chamber 8 and the intermediate chamber 10. The second steam generation nozzle 13c communicates between the intermediate chamber 10 and the downstream chamber 9. Condensed water 2 enters the upstream chamber 8 from the left side, passes through the first steam generation nozzle 13a, enters the intermediate chamber 10, and exits into the downstream chamber 9 through the second steam generation nozzle 13c, as shown by the arrow. Since the intermediate chamber 10 is one space, the condensed water passes through the second steam generation nozzle 13d and exits to the downstream chamber 9.

FIG. 7 is a perspective view of the steam generation nozzle 13. The steam generating nozzle 13 includes a head 14 and a threaded portion 15, and has a through hole 16.

FIG. 8 is a cross-sectional view showing different forms of the steam generation nozzle 13. (A) is a type in which the through hole 16 of the steam generating nozzle 13 gradually becomes thicker toward the head 14 side, as shown in hole diameters d1, d2, and d3. (B) is a type in which the through hole 16 of the steam generation nozzle 13 is gradually narrowed toward the head 14 side, as shown in hole diameters d5 and d6. The reason why the holes on the head 14 side are narrow is that the holes on the side facing the downstream chamber 9 are made thicker. (C) is a type in which the through hole 16 of the steam generation nozzle 13 has a constant hole diameter.

FIG. 9 is a sectional view specifically showing the operation of the steam generation nozzle 13. The cross section in FIG. 9 is taken along line AA or line CC in FIG. 4. As shown in FIG. 9, the type (A) in FIG. 8 was used for the first steam generation nozzles 13a and 13b, and the type (B) in FIG. 8 was used for the second steam generation nozzles 13c and 13d. Since the head 14 of the steam generating nozzle 13 in the intermediate chamber 10 faces upward, it can be attached or detached by removing the cap 11. The hole diameter d4 of the second steam generation nozzles 13c, 13d on the intermediate chamber 10 side is larger than the hole diameter d3 of the first steam generation nozzles 13a, 13b on the intermediate chamber 10 side. The pore diameters of type (A) were d1<d2<d3, and the pore diameters of type (B) were d4<d5, with the relationship d3<d4.

FIG. 10 is a sectional view specifically showing the operation of the steam generation nozzle 13. The type (A) in FIG. 8 was used for the first steam generation nozzles 13a and 13b, and the type (C) in FIG. 8 was used for the second steam generation nozzles 13c and 13d. Here, the hole diameter d6 of the second steam generation nozzles 13c, 13d on the intermediate chamber 10 side is larger than the hole diameter d3 of the first steam generation nozzles 13a, 13b on the intermediate chamber 10 side. The pore diameter of type (A) is d1<d2<d3, and the pore diameter on the intermediate chamber 10 side of type (C) is d6, but the relationship d3<d6 is maintained.

In this embodiment, two series of first steam generation nozzles 13a and 13b from the upstream chamber 8 to the intermediate chamber 10 and two series of second steam generation nozzles 13c and 13d from the intermediate chamber 10 to the downstream chamber 9 are provided. However, the present invention is not limited to this, and it is also possible to use six lines in three series.

INDUSTRIAL APPLICATION This invention is suitable as a nozzle type steam trap which has a large drainage capacity of condensed water, and can suppress discharge|emission of steam.

1 Condensed water accumulation pipe 2 Condensed water 3 Drain valve 4 Filter 5 Inlet side flange 6 Outlet side flange 7 Main body 8 Upstream chamber 9 Downstream chamber 10 Intermediate chamber 11 Cap 12 Partition wall 13 Steam generation nozzle 13a, 13b First steam generation nozzle 13c, 13d second steam generation nozzle 14 head 15 threaded part 16 through hole 17 discharge pipe 18 discharge pipe 100 nozzle type steam trap

Claims (2)

In a nozzle type steam trap connected to a condensate storage pipe into which condensed water from a steam main is introduced, converting the condensed water into steam and discharging it into a discharge pipe,
an inlet flange connected to the condensate accumulation pipe;
an outlet side flange connected to the discharge pipe;
an upstream chamber communicating with the inlet side flange;
a downstream chamber communicating with the outlet side flange;
an intermediate chamber connected to the upstream chamber and the downstream chamber;
A steam generation nozzle consisting of a first steam generation nozzle that communicates the upstream chamber and the intermediate chamber, and a second steam generation nozzle that communicates the intermediate chamber and the downstream chamber;
a cap that opens and closes the intermediate chamber to make the steam generation nozzle replaceable;
Equipped with
The first steam generation nozzle is of a type in which the diameter of the through hole gradually increases toward the head side, and the second steam generation nozzle is of a type in which the diameter of the through hole gradually decreases toward the head side,
Two first steam generation nozzles are provided in parallel between the upstream chamber and the intermediate chamber, and two second steam generation nozzles are provided in parallel between the intermediate chamber and the downstream chamber, A nozzle-type steam trap characterized in that the steam generating nozzles are comprised of two series of four nozzles . The nozzle type steam trap according to claim 1, wherein a hole diameter of the second steam generation nozzle on the intermediate chamber side is larger than a hole diameter of the first steam generation nozzle on the intermediate chamber side.

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