KR102201478B1 - Optimized Nozzle type Invar Steam trap - Google Patents

Abstract

The present invention is an optimized multi-nozzle type invar steam such as a Venturi nozzle type or an orifice nozzle type for discharging condensate generated by steam in various facilities using steam (steam) as a heating source. It relates to a trap, comprising: a steam connected to a steam pipe, a condensate water inlet and a condensate water outlet formed in the same axial direction as the condensate inlet, a branch pipe branched in a diagonal direction from the condensate water inlet, and vertical between the steam inlet and the condensate water outlet In the steam trap consisting of an orifice portion installed and connected, the orifice portion is in the form of a circular plate installed in an orifice nozzle box formed on an upper portion of the trap body, and includes a rotary orifice nozzle through which orifice holes of different diameters of different sizes are radially penetrated, The orifice nozzle is characterized in that it is fixed to the trap body as a bolt through a central bolt hole by communicating the selected orifice hole with a vertical spiral venturi inlet pipe consisting of a spiral screw that rotates from the bottom to the top.

Description

Optimized Nozzle type Invar Steam trap

The present invention is an optimized multi-nozzle type invar steam such as a Venturi nozzle type or an orifice nozzle type for discharging condensate generated by steam in various facilities using steam (steam) as a heating source. It's about traps.

As is known, most steam traps are installed to automatically discharge condensed water generated by condensing steam in places using a heating source such as a steam main or heat exchanger in a production facility using steam.

Such condensed water moves with steam and stays in the equipment, resulting in a decrease in thermal efficiency and equipment failure, and also causes many obstacles such as noise and vibration due to a water hammer.

Therefore, a steam trap is installed for smooth discharge of condensed water.

The steam trap is a kind of automatic valve installed to remove condensate, and there are various methods.

▷ Ball Float method

This method is a method of discharging it to the outside of the steam transfer pipe by using the difference in density from steam, and is vulnerable to freezing in winter.

▷ Disk method

As a so-called thermal equilibrium method, when condensed water accumulates in the trap, the internal temperature is lowered by the disk and the disk is lifted due to a decrease in pressure, and the condensed water is discharged.

▷ Bi-metal method

When the condensed water is filled in the steam trap, the internal temperature of the trap decreases. At this time, the ball valve is operated by the bi-metal characteristic that the other two metals operate oppositely.

This is a method of discharging condensate to the outside by opening.

▷ Bucket method

When the condensed water is filled in the steam trap, the bucket floats and the drain valve is closed, and the condensate flows to the drain, sinks the bucket on the drain side, and opens the drain valve directly connected to the bucket to allow the condensate in the bucket to be discharged to the outside. This is also a structure that is vulnerable to freezing in winter.

▷ Orifice method

The mechanical methods mentioned above are difficult to ensure the safety of facilities due to repetition of operations with moving parts, mechanical damage accompanying delayed operations, and steam leakage, and have disadvantages such as reduced efficiency and shortened lifespan.

In that respect, the orifice method minimizes steam leakage, simplifies operation, has a small heating area, improves heat transfer rate to the heating element, and does not generate noise and vibration, so it has a long life.

However, in the orifice nozzle type steam trap, if the discharged condensate remains occupied by the orifice hole, the leakage of steam can be prevented, thus minimizing steam leakage, and there is no separate moving part, and the heat transfer rate of the heating element is small. There are advantages such as being high,

-It does not react as much as the amount of condensate changes due to expansion or contraction factors such as changes in ambient temperature.

-Fine particles such as scale are accumulated around the orifice hole or in the condensate discharge channel.

The orifice hole is blocked or the flow path is narrowed, making it difficult to discharge condensate.

-It is necessary to select and install the nozzle size according to the amount of condensate generated.

-Many and various nozzle sizes must be provided.

There are such problems.

<prior art literature>

[Patent Document 001] Domestic registered patent No. 10-0244999 (registered on November 25, 1999)

[Patent Document 002] Domestic public utility model No. 2000-0020351 (published on December 5, 2000)

[Patent Document 003] Korean Patent Publication No. 10-2005-0031131 (published on Apr. 5, 2005)

[Patent Document 004] Domestic registered patent No. 10-1189706 (registered on October 4, 2012)

[Patent Document 005] Domestic registered patent No. 10-1422733 (registered on 2014.07.17)

[Patent Document 006] Domestic registered patent No. 10-1463066 (registered on November 14, 2014)

[Patent Document 007] Domestic registration patent No. 10-1484602 (registered on January 14, 2015)

[Patent Document 008] Domestic registered patent No. 10-1490412 (registered on Jan. 27, 2015)

[Patent Document 009] Domestic registered patent No. 10-1545898 (registered on August 13, 2015)

[Patent Document 010] Domestic registered patent No. 10-1578126 (registered on 2015.12.10)

[Patent Document 011] Korean Patent Publication No. 10-2016-0038897 (published on April 7, 2016)

[Patent Document 012] Korean Patent Publication No. 10-2017-0116731 (published on October 20, 2017)

[Patent Document 013] Domestic registered patent No. 10-1871947 (registered on June 21, 2018)

[Patent Document 014] Domestic Patent No. 10-1910552 (registered on October 16, 2018)

[Patent Document 015] Domestic registered patent No. 10-2119018 (registered on May 29, 2020)

The present invention aims to solve such a conventional problem, and the first object is to use the Invar 36 alloy, which has almost no coefficient of thermal expansion, as the material of the steam trap, so that the orifice caused by expansion and contraction when the ambient temperature changes at high temperature. It is to prevent leakage of condensed water by preventing gaps in the nozzles and venturi nozzles.

Another object of the present invention is to facilitate the discharge of condensed water by rotating the orifice nozzle and forming a plurality of orifice holes of different diameters to select and use the orifice hole proportional to the aging degree of the steam line or the amount of condensed water. There is one.

Another object of the present invention is to increase the efficiency of generating live steam due to increased turbulence and to prevent reverse flow of condensate by configuring a venturi inlet and a venturi inlet pipe as a spiral tunnel.

The present invention is a means for achieving the above object, the steam connected to the steam pipe, the condensate water inlet and the condensate water outlet formed in the same axial direction as the condensate inlet, the condensate inlet and the branch pipe installed diagonally in a diagonal direction, the condensate inlet In the steam trap consisting of an orifice unit vertically installed and connected between the condensate discharge port and the orifice unit, the orifice unit is a circular plate installed in the orifice nozzle box formed on the upper part of the trap body, and a plurality of orifice holes of different diameters are radially penetrated. Including a rotary orifice nozzle, wherein the orifice nozzle rotates the selected orifice hole to be fixed to the trap body as a bolt through a central bolt hole by communicating with a vertical spiral venturi inlet pipe consisting of a helical screw from bottom to top. It provides an optimized multi-nozzle type in-bar steam trap, which is characterized by a box.

In addition, the orifice nozzle is characterized in that a stopper hole for preventing rotation is formed on the bottom surface and is engaged with a nozzle stop pin protruding in the trap body to prevent arbitrary rotation.

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According to the present invention, the body metal material such as the orifice nozzle type and the Venturi nozzle type is made of Invar 36 alloy without thermal expansion and contraction, thereby maximizing the constant live steam generation efficiency even with changes in ambient temperature and steam usage.

In addition, due to the installation of a rotary selectable nozzle, foreign matter is formed due to deterioration of the steam piping line, and incomplete factors such as clogging of the drain filter or nozzle can be solved, and the mesh size of the drain filter (strainer) is divided into 2 to 4 types. It can be selected and used according to the selected nozzle standard, and when condensate occupies the orifice hole, it prevents the leakage of steam, and the orifice tip structure (venturi tube) is spirally formed to prevent limited reverse flow in the reverse direction. Has the effect of.

1 is a cross-sectional view according to an embodiment of the present invention
2 is an exemplary perspective view of an orifice nozzle of the present invention
3 is a cross-sectional view taken along line "A-A" of FIG. 1
4 is a cross-sectional view according to another embodiment of the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 to 4, the optimized multi-nozzle type invar steam trap 100 of the present invention is the same as the steam and condensate inlet 10 and the condensate inlet 10 connected to the steam pipe (I). The condensate outlet 20 formed in the axial direction, the condensate inlet 10 and the branch pipe 30 branched in the diagonal direction, and an orifice vertically installed and connected between the condensate inlet 10 and the condensate outlet 20 It consists of a part 40.

The metal materials of various parts including the trap body of the present invention are all made of Invar 36 alloy casting.

Invar 36 alloy is an alloy of 36% nickel and 64% iron, which has the smallest coefficient of thermal expansion, and rarely expands or contracts even at alternating high temperatures of 260° and room temperature. Accordingly, the clearance between the orifice nozzle 41 and the venturi nozzle is reduced. As it does not occur, leakage of condensate is prevented.

A strainer 31 is installed in the branch pipe 30 to filter foreign substances contained in the steam and condensate flowing into the trap body. It is a metal material having heat resistance and corrosion resistance that can withstand high-temperature steam, that is, an Invar 36 material. It is preferable to configure, and consists of four types of mesh filters corresponding to the size of the orifice hole 42 penetrating the orifice nozzle 41 of the orifice portion 40 to be described later.

In addition, at the end of the branch pipe 30, as shown in FIG. 1, a blow-down valve 32 for controlling pressure is installed to discharge the internal pressure according to the occurrence of abnormal pressure, which is blow-down 4% lower than the normal set pressure. It is set and reset after the overpressure is removed, and if necessary, it is possible to install the valve 32 of a manual open structure as shown in FIG.

The orifice part 40 includes an orifice nozzle 41 installed in an orifice nozzle box 43 formed on the upper part of the trap body, and the orifice nozzle box 43 is a condensate discharge port 20 through the drain inner discharge port 44 It communicates with the external drain of the drain 45 and is installed to open and close the cover 46 at the top, so that the operation of the orifice unit 40 is easy and cleaning is easy.

The orifice nozzle 41 is a rotary circular plate in which a plurality of orifice holes 42 (four in the example drawing) are radially penetrated, and can be separated from the trap body as a bolt 48 through a bolt hole 47 in the center. A stopper hole 49 for preventing rotation is inserted into the nozzle stop pin 50 protruding in the trap body to prevent arbitrary rotation, and the orifice nozzle 41 has a selected orifice hole 42 It is fixed to the trap body as a bolt 48 through the bolt hole 47 in the center by communicating with the vertical spiral venturi inlet pipe 60 in a rotational manner.

Here, the positions of the condensate inlet 10 and the condensate outlet 20, the spiral venturi inlet pipe 60, and the orifice hole 42 are maintained at 90° to each other to maximize the angular momentum in the Coriolis effect.

Since the orifice nozzle 41 of the present invention is a rotary structure that is detachably coupled to the trap body as a bolt 48, a spiral venturi inlet pipe 60 is selected by selecting a suitable orifice hole 42 among sizes having a large and small diameter penetrated through the nozzle. ), the condensed water can be efficiently removed in proportion to the aging degree of the steam line or the amount of condensed water, and the strainer 31 installed in the branch pipe 30 also has an orifice hole ( 42), which is selected in response to the condensate inlet 10 so that the flow rate passing through the mesh network of the strainer 31 of the branch pipe 30 is smoothly discharged through the orifice hole 42. , The mesh hole of the strainer 31 is smaller than the size of the orifice hole 42 is used.

In addition, the spiral venturi inlet pipe 60 is configured in the form of a spiral screw directed from the bottom to the top, and the steam and condensate are introduced into the steam and condensate inlet pipes and foreign substances are removed by the strainer 31 of the branch pipe 30. In particular, the turbulence immediately before the spiral venturi inlet pipe 60 is laminarized, thereby increasing the viscosity of the condensate and increasing the friction between the fluid molecules, thereby preventing the reverse flow. When the steam and condensate occupy the spiral venturi inlet pipe 60, the phenomenon of preventing steam leakage is maintained.However, in case of an emergency, the spiral rotation force occurs due to the effect of flashing and cavitation. It provides the effect of preventing reverse flow due to the effect of increasing the coefficient of friction of.

In the present invention, the trap body and parts are made of Invar 36 alloy castings with a low coefficient of thermal expansion, so that expansion and contraction hardly occur even in the alternating state of high temperature and room temperature, so that condensate water is generated by gaps between the orifice nozzle 41 and the venturi nozzle. There is a feature to prevent leakage, and in particular, the orifice nozzle 41 penetrates a plurality of large and small diameter orifice holes 42 and rotates them to selectively communicate with the spiral venturi inlet pipe 60, thereby deteriorating the steam line. Alternatively, there is a great advantage in facilitating the discharge of condensed water in proportion to the amount of condensed water.

DESCRIPTION OF SYMBOLS 10 Condensate water inlet 20 Condensate water discharge 30 Branch pipe 31 Strainer 32 Valve 40 Orifice part 41 Orifice nozzle 42 Orifice hole 43 Orifice nozzle box 44 Internal discharge port 45 External discharge port 46 Cover 47 Bolt hole 48: bolt 49: stopper hole 50: nozzle stop pin 60: venturi inlet pipe 100: steam trap I: steam pipe

Claims (4)

Steam connected to the steam pipe (I), a condensate inlet (10), a condensate outlet (20) formed in the same axial direction as the condensate inlet (10), and a branch pipe ( 30), in the steam trap 100 composed of an orifice portion 40 connected to and installed vertically between the condensed water inlet 10 and the condensed water outlet 20, the orifice portion 40 is at the top of the trap body In the form of a circular plate installed in the formed orifice nozzle box 43, a plurality of orifice holes 42 having different diameters are radially penetrated, and the rotary orifice nozzle 41 is a selected orifice The hole 42 is connected to the vertical spiral venturi inlet pipe 60 configured in the form of a helical screw from the bottom to the top in a rotational manner, and is fixed to the trap body as a bolt 48 through the bolt hole 47 at the center. Optimized multi-nozzle type inbar steam trap characterized by. delete The optimized multi-nozzle type Invar Steam according to claim 1, wherein the orifice nozzle (41) has a stopper hole (49) for preventing rotation on the bottom surface and engages with the nozzle stop pin (50) protruding in the trap body to prevent arbitrary rotation. traps. delete

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