KR20190133403A - Bellow-type steam trap for reducing watter hammer - Google Patents

Abstract

The present invention relates to a bellows-type steam trap for water hammer reduction to reduce a water hammer phenomenon in a pipe, specifically, a steam trap in which condensate water containing steam flows. According to the present invention, the bellows-type steam trap for water hammer reduction comprises: a housing (10) having an inlet formed on one side thereof, an outlet formed on the other side thereof, a cap coupled to an upper portion thereof, and a space formed therein; bellows (20) embedded in the internal space of the housing; an upper flange and a lower flange (30, 40) fixed on an upper portion and a lower portion of the bellows to support the bellows; and a center shaft unit (50) installed at the center of the bellows, wherein an upper portion thereof penetrates the upper flange to be extended upwards and a lower portion thereof ends at the upper surface of the lower flange. A protrusion unit is formed outwards on the outer circumferential surface of the upper portion of the upper flange. A prescribed liquid material is accommodated in a space (21) between the center shaft unit and the bellows.

Description

Bellows type steam trap for water hammer reduction {BELLOW-TYPE STEAM TRAP FOR REDUCING WATTER HAMMER}

The present invention relates to a bellows type steam trap, and more particularly to a bellows type steam trap for water hammer reduction for reducing the water hammer phenomenon occurring in the pipe, in particular in the steam trap, flowing steam containing condensed water.

In general, a steam trap is a device such as an automatic valve designed to effectively recover and discharge condensate generated by condensation of steam (steam), which is recovered after being used in a heat exchanger of a commercial or domestic boiler or a production line requiring steam. Only condensate should be recovered and discharged, and leakage of steam should be suppressed. In other words, the steam trap is used to recover and discharge only condensate in the steam and to prevent the leakage of steam. The high temperature and high pressure condensate is caused by a water hammer due to a change in direction in the pipe or a sudden closing of the valve. Since a hammer phenomenon is caused to cause an impact sound, an apparatus for removing or reducing the hammer is required.

Conventional steam traps are used in the disk, bimetal and bucket method, but this method is a structure that is easy to leak the steam, but the steam trap is slow operation speed takes a long time to open and close the outlet, so it is easy to lose a lot of steam There are disadvantages in terms of thermal efficiency of the boiler and also insufficient to reduce or prevent the water hammer phenomenon in the piping, especially in steam traps.

Patent Publication No. 10-2008-0076148: Steam Traps

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a water hammer reduction bellows type steam trap for reducing a water hammer phenomenon occurring in a pipe, particularly a steam trap, in which steam-containing condensed water flows. To provide.

In order to solve the above problems, the water hammer reduction bellows-type steam trap according to the present invention, the inlet is formed on one side, the outlet is formed on the other side, the cap 14 is coupled to the top, the space 11 inside The housing 10 is formed; A bellows 20 embedded in the inner space 11 of the housing; An upper flange 30 and a lower flange 40 fixed to the upper and lower portions of the bellows to support the bellows; And a central shaft portion 50 installed at a central portion of the bellows, the upper portion of which extends upwardly through the upper flange, the lower portion of which is terminated at an upper surface of the lower flange 40. It is configured to include, the upper outer peripheral surface of the upper flange 30 is formed with a protrusion 31 toward the outside, the predetermined liquid material in the space 21 between the central shaft portion 50 and the bellows 20 It is characterized in that it is accommodated.

Preferably, it is installed on the upper side of the bellows 20, the outer edge lower surface is seated on the first seating portion 12 formed in the middle side of the housing inner space 11, the inner edge upper surface of the protrusion of the upper flange ( 31 includes a ring-shaped lower plate 60 formed with a plurality of holes 61 on which the lower surface of the lower surface is seated. It includes a disk-shaped upper plate 70 which is seated on the second seating portion 13 formed on the upper side of the 11 and is formed with a plurality of holes (71). In addition, a spring 80 is formed between the lower plate 60 and the upper plate 70 to surround the upper outer circumferential surface of the central shaft portion 50, and a projection on the outer circumferential surface of the upper predetermined position of the central shaft portion 50. 51 is further formed, and the protrusion is inserted and seated in the central groove portion 32 of the upper flange 30. In particular, the lower portion of the lower flange 40, the lower portion of the plug 41 is formed downward, the lower end of the plug is composed of a spherical member 42, the spherical member 42 is lower than the inner space 11 of the housing Corresponding to the discharge hole of the discharge nozzle (90) formed in the, the discharge nozzle 90 is in communication with the outlet through the inner pipe consisting of a horizontal pipe 91 and a vertical pipe (92) communicating with each other, the horizontal pipe The starting point communicates with the discharge nozzle, the end point of the vertical pipe communicates with the outlet port, and the inlet port communicates with the housing inner space 11 between the upper plate 70 and the lower plate 60.

The bellows type steam trap for water hammer reduction having the characteristics as described above can alleviate or significantly reduce the water hammer phenomenon in the pipe, especially the steam trap, in which the steam-containing condensed water flows. It is possible to recover and discharge only condensate while suppressing leakage of steam).

1 is an external perspective view of a bellows type steam trap according to the present invention, showing a horizontal type.
2 is an exploded perspective view of the bellows-type steam trap according to the present invention.
3 is an external perspective view of the bellows-type steam trap according to the present invention seen from another direction.
4 is an exploded perspective view from another direction of the bellows type steam trap according to the present invention;
5 is a cross-sectional view taken along the line aa of FIG. 1.
6 is a cross-sectional perspective view taken along the line aa of FIG. 1.
7 is an external perspective view of a bellows type steam trap according to the present invention, showing a vertical type.
8 is an exploded perspective view of a bellows-type steam trap according to the present invention.
9 is an external perspective view of the bellows-type steam trap according to the present invention seen from another direction.
10 is an exploded perspective view from another direction of the bellows type steam trap according to the present invention.
FIG. 11 is a cross-sectional view taken along the line aa of FIG. 7.
12 is a cross-sectional perspective view taken along the line aa of FIG. 7.

The present invention relates to a bellows type steam trap for water hammer reduction for reducing water hammer phenomenon occurring in a pipe, in particular, within a steam trap, in which condensate containing steam flows. It can be divided into vertical, the basic components of the horizontal and vertical is roughly the same, and can be divided according to the location of the inlet and outlet. 1 to 6 show horizontal bellows type steam traps, and FIGS. 7 to 12 illustrate vertical bellows type steam traps.

1 to 12, a preferred embodiment according to the present invention will be described. Preferably, the description will be given based on a horizontal steam trap.

Bellows type steam trap according to the present invention, the inlet is formed on one side, the outlet is formed on the other side, the upper portion is coupled to the cap 14, the housing 10 is formed inside the space (11); A bellows 20 embedded in the inner space 11 of the housing; An upper flange 30 and a lower flange 40 fixed to the upper and lower portions of the bellows to support the bellows; And a central shaft portion 50 installed at a central portion of the bellows, the upper portion of which extends upwardly through the upper flange 30, and the lower portion of which is terminated at an upper surface of the lower flange 40. The upper outer circumferential surface of the upper flange 30 is formed to include a protrusion 31 toward the outside, the space 21 between the central shaft portion 50 and the bellows 20, a predetermined liquid material is Are accepted.

Preferably, the upper flange 30, the bellows 20 and the lower flange 40 are sequentially installed in the downward direction from the upper side of the inner space 11 formed in the housing 10, the central shaft portion 50 is Terminates at the lower flange 40 through the central portions of the upper flange 30 and the bellows 20. The upper flange and the lower flange support the upper and lower sides to keep the bellows stable. The housing 10, the upper flange and the lower flange (30.40), the central shaft portion 50 is preferably formed of a rigid member such as a metal that can withstand thermal expansion and contraction so that the volume change does not occur by the high temperature and high pressure condensate. In some cases, it may be made of ceramic or the like. The bellows 20 is preferably made of stainless material so that the thermal expansion or contraction is made smoothly.

A ring-shaped lower plate 60 is installed on an upper side of the bellows 20, and a lower surface of an outer edge of the lower plate 20 is seated on a first seating part 12 formed at an intermediate side of the housing inner space 11 so that the housing ( 10) It is comprised in the internal space 11. The lower surface of the protrusion 31 of the upper flange 30 is seated on the upper surface of the inner edge of the lower plate 60. A plurality of holes 61 are formed in the lower plate 60. The plurality of holes 61 are formed in the lower plate in a form surrounding the central shaft portion 50 and the upper flange 30.

On the upper side of the lower plate 60, a disk-shaped upper plate 70 is installed spaced apart from the lower plate by a predetermined distance. The lower surface of the edge of the upper plate 70 is seated on the second seating part 13 formed on the upper side of the housing inner space 11, and the second seating part 13 is predetermined on the upper part of the first seating part 12. It is formed spaced apart. In general, the distance between the first seating portion 12 and the second seating portion 13 corresponds to the separation distance between the lower plate 60 and the upper plate 70. Like the lower plate, a plurality of holes 71 are formed in the upper plate 70, and the holes 71 are formed in the upper plate 70 so as to surround the uppermost end of the central shaft portion 50. Although it is mentioned here that the upper plate and the lower plate form a disc and a ring shape, respectively, it is not necessarily limited to this shape.

Preferably, a through hole (not shown) through which the upper end of the central shaft portion 50 passes is formed at the center of the upper plate 70 so that the upper end of the central shaft portion 50 is inserted into the through hole, thereby providing a central shaft portion ( 50) is stably positioned in position. In particular, the holes 71 of the upper plate 70 is configured to surround the through hole.

The cap 14 is coupled to the housing 10 by a coupling bolt 17, which is installed to disconnect the housing inner space 11 from the outside, and a gasket 15 at the coupling portion of the cap and the housing. This is installed to maintain the airtightness of the housing internal space 11.

The snap ring 16 is installed below the gasket 15, and the snap ring 16 is inserted into and installed in a groove (not shown) formed on an inner circumferential surface of the inner space 11, and is always provided in the snap ring 16. A portion of the lower surface comes into contact with the upper surface of the upper plate 70, thereby allowing the upper plate to be stably maintained in the housing inner space 11.

Preferably, the inner space 11 and the inlet of the housing between the upper plate 70 and the lower plate 60 are formed in communication. As described above, the inlet is formed in communication with the inner space of the housing between the upper plate 70 and the lower plate 60 so that when the high temperature and high pressure condensate (including steam) flows into the steam trap, it is pushed all the way into the inner space 11 of the housing. The condensed water is dispersed through the holes 71 and 61 of the upper plate and the lower plate without lifting, thereby reducing the water hammer phenomenon directly hitting the wall of the steam tram. That is, condensate flowing into the housing inner space 11 spreads evenly up and down through the holes 71 and 61 formed in the upper plate and the lower plate, thereby alleviating the water hammer phenomenon caused by directly hitting the wall in the housing. And reduced. In the vertical type, the condensate containing steam flows into the housing interior 11 through the holes 71 of the upper plate 70 and the holes 61 of the lower plate 60, thereby temporarily lowering the speed and pressure of the condensate. The water hammer phenomenon of hitting a wall in the housing directly into a state can be alleviated and reduced.

In addition, when both the horizontal and vertical steam traps, the condensate containing the steam flows into the housing interior 11, the condensate dispersion effect is generated through the upper plate, the lower plate (70, 60) and the holes (71, 61) Since the sea speed and pressure are temporarily lowered, condensate can directly impact the bellows 20, thereby avoiding water hammer, which can be prevented from damaging the bellows.

In addition, between the lower plate 60 and the upper plate 70 surrounds the upper outer circumferential surface of the central shaft portion 50, the spring 80 is configured, the spring resilient bellows when the bellows over-expanded to the high temperature and high pressure condensate It is a supportive role.

In addition, in more detail, the central shaft portion 50 is generally cylindrical, and may be divided into three parts. A portion surrounded by the bellows 20, a portion surrounded by the upper flange 30, and a spring 80 are included. This is divided into enclosing parts. The portion surrounded by the bellows 20 has the smallest diameter, the portion surrounded by the spring 80 has the largest diameter, and the diameter of the portion surrounded by the upper flange 30 is the diameter of the portion surrounded by the bellows 20. It is larger and has a diameter size smaller than the diameter of the portion that the spring 80 encloses. The smallest diameter of the portion surrounded by the bellows 20 is to secure the space 21 between the bellows 20 and the central shaft portion 50, and the predetermined space such as oil in the space 21 is secured. Liquid matter is received. The material is preferably sensitive to thermal expansion and contraction. As the material in the interior space 21 is filled with sensitive to thermal expansion and contraction, the thermal expansion and contraction of the material is associated with the expansion or contraction of the bellows 20.

A protrusion 51 is further formed on an outer circumferential surface of the upper predetermined position of the central shaft portion 50, that is, the boundary portion between the portion surrounded by the upper flange 30 and the portion surrounded by the spring 80. By inserting and seating in the central groove portion 32 of the flange 30, the central shaft portion 50 is firmly connected to the upper flange 30, the central shaft portion and the upper flange is integrally coupled to each other. Preferably, a gasket (not shown) is further provided on a surface where the central groove 32 of the upper flange and the protrusion 51 of the central shaft contact each other, thereby providing an airtightness between the protrusion 51 and the central groove 32. This serves to prevent condensate flowing into the inlet from entering the space 21 formed between the central shaft 50 and the bellows 20.

The lower flange 40 is formed with a plug 41 extending downward, the plug 41 is formed in the center of the lower surface of the lower flange 40, the lower end of the plug is composed of a spherical member 42. A discharge nozzle 90 is formed below the inner space 11 of the housing below the plug 41, and a discharge hole is formed in the discharge nozzle 91, and the plug 41 opens and closes the discharge nozzle 90. In particular, the spherical member 42 of the plug directly opens and closes the discharge hole (not shown) of the discharge nozzle 90. Condensed water (including steam) introduced through the inlet is introduced into the internal pipe through the discharge nozzle 90 through the inner space 11 of the housing 10 and finally discharged to the outlet. The spherical member is preferably a bearing, for example, and the spherical member 42 is attached to the lower end of the plug 41 by pressing (pressing) pressing.

The inner conduit consists of a horizontal conduit 91 and a vertical conduit 92 communicating with each other, the discharge nozzle 90 communicates with the horizontal conduit 91, the horizontal conduit is connected to the vertical conduit. In detail, the starting point of the horizontal pipe line 91 directly communicates with the discharge nozzle 90, and the end point of the vertical pipe line 92 directly communicates with the outlet port, thereby entering the inner space 11 of the housing. In condensate containing steam, only condensate is discharged through the internal conduit to the outlet.

Although not shown in the drawing, a stainless steel filter may be further installed at a predetermined position inside the inlet or the inner space 11 of the inlet to filter the impurities in the fine particles that may be contained in the condensate containing steam to prevent the flow path from being blocked. Can be.

Steam traps are usually installed in areas where boilers or steam (steam) are required to discharge condensate from production lines.

Briefly describing the discharge of the high-temperature, high-pressure steam-containing condensate in the bellows-type steam trap for water hammer reduction according to the present invention, the condensate containing steam flows into the housing inner space 11 through the inlet of the housing 10 At this time, the condensate containing steam is evenly distributed through the upper plate 70 and the lower plate 60 through the holes 61 and 71 of the upper plate and the lower plate to alleviate the water hammer phenomenon hitting the inner wall of the housing. The condensate containing steam introduced into the housing is lowered into the housing inner space 11 through the hole 61 of the lower plate 60 and reaches around the bellows 20. At this time, the steam-containing condensate is generally maintained at 197 ° C to 196 ° C. The heat of the hot steam-containing condensate is transferred to the material contained in the space 21 in the bellows, thereby expanding the bellows 20 downward due to thermal expansion of the material. (Height). At this time, the lower flange 40 and the plug 41 formed below the bellows 20 also move downward with the bellows 20 so that the spherical member 42 of the plug is discharged from the discharge nozzle 90 (first open state). ), The condensate containing steam is temporarily trapped in the housing interior space (11). The temperature of the condensate containing steam temporarily decreases while staying in the housing interior space 11, and only the condensate flows downward. This temporary drop in temperature leads to heat shrinkage of the material contained in the space 21 in the bellows, causing the bellows to contract, such that the lower flange 40 and the plug 41 also move upward with the bellows so that the spherical member 42 of the plug is discharged. By opening the discharge hole of the nozzle 90, the condensed water is discharged to the outlet through the inner pipe (horizontal and vertical pipe). Condensate is discharged through the discharge hole of the discharge nozzle (90) and at the same time the discharge hole of the discharge nozzle is closed, another condensate containing steam is introduced into the housing of the steam trap, the inlet and discharge of the condensate containing steam is bellows (20) , The lower flange 40 and the plug 41 is made continuously in the vertical movement.

The spherical member 42 at the lower end of the plug 41 and the upper end of the discharge nozzle 90 are configured to be in close proximity, preferably at intervals of about 1 mm to 1.5 mm, so that the bellows 20 has a slight expansion (extension) and contraction. In addition, the spherical member 42 of the plug can continuously open and close the discharge hole of the discharge nozzle 90, the continuous discharge of the condensate is made. The opening and closing of the discharge hole 90 of the discharge nozzle 90 by the spherical member 42 of the plug 41 proceeds very quickly, for example, in units of seconds. Due to this continuous and rapid opening and closing, only condensate is discharged from the steam-containing condensate into the inner pipe, and the leakage of steam is minimized.

The condensed water is discharged through an internal pipe (horizontal and vertical pipes) by an internal pressure due to its high pressure and high pressure. The condensate discharged through the steam trap is transferred to a condensate storage tank (not shown) and stored and finally discharged to the outside, or may be supplied to a boiler.

And, each thin plate constituting the bellows 20 is produced through a press work, by combining the respective thin plates by welding to implement a single overall bellows shape, in this way, the tolerance occurs when welding each thin plate This causes cumulative tolerances. Due to the cumulative tolerances during each thin sheet welding operation, it is difficult to limit the overall length of the bellows (the total length may vary depending on the temperature or pressure of the condensate containing steam). 50). In particular, since the length between the upper flange 30 and the lower flange 40 on the upper center shaft corresponds to the entire length of the actual bellows, the central shaft between the upper flange 30 and the lower flange 40 during each thin plate welding. It is preferable to refer to the length of (50). Only the total length of the bellows should be defined to determine the distance between the spherical member 42 at the bottom of the plug 41 of the lower flange 40 of the bellows bottom and the top of the discharge nozzle 90, which is the condensate containing steam. Can be determined according to the temperature or pressure.

As mentioned above, the bellows-type steam trap according to the present invention is divided into a horizontal type and a vertical type, and can be selectively used according to various conditions such as a pipe type and an installation position, and a horizontal type is not shown in the drawing but inside The condensate outlet is created separately at the point where the horizontal line and the vertical line meet each other to prevent the freezing of the winter season by discharging condensate that may remain in the inner line even after the condensate is discharged, especially the vertical type. When the condensed water is discharged in direct communication with the discharge hole of the discharge line 90, condensed water does not remain in the housing inner space and the conduit, which is advantageous for preventing freezing in winter.

The above description is only illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention but to describe the present invention, and the technical scope of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10.Housing 11.Housing interior space
12.First seating section 13.Second seating section
14.Cap 15.Gasket
16.Snap Ring 17.Combination Bolt
20 Bellows 21 Space
30.Upper flange 31.Protrusion
32.groove
40 Lower flange 41.Plug
42. Spherical member
50.Center shaft 51.Protrusion
60.Bottom Plate 61.Hole
70.Top plate 71.Hole
80.Spring
90.Exhaust nozzle 91.Horizontal pipe
92.Vertical line

Claims (8)

In the bellows type steam trap,
The steam trap,
An inlet is formed at one side, an outlet is formed at the other side, and an upper portion of the housing 10 having a cap 14 coupled thereto and a space 11 formed therein;
A bellows 20 embedded in the inner space 11 of the housing;
An upper flange 30 and a lower flange 40 fixed to the upper and lower portions of the bellows to support the bellows; And
A central shaft portion 50 installed at a central portion of the bellows, the upper portion of which extends upwardly through the upper flange, and the lower portion of which is terminated at an upper surface of the lower flange 40;
It includes, the upper outer peripheral surface of the upper flange 30 is formed with a projection 31 toward the outside, the space 21 between the central shaft portion 50 and the bellows 20 is a predetermined liquid material is accommodated Bellows type steam trap, characterized in that.
The method of claim 1,
It is installed on the upper side of the bellows 20, the outer edge lower surface is seated on the first seating portion 12 formed in the middle side of the housing interior space 11, the inner edge upper surface of the lower surface of the protrusion 31 of the upper flange A bellows-type steam trap comprising a ring-shaped lower plate 60 in which a plurality of holes 61 are seated.
The method of claim 2,
A disc shape having a plurality of holes 71 formed on the second seating portion 13 formed on the upper side of the inner space 11 of the housing and spaced apart a predetermined distance from the upper side of the lower plate 60 is formed. Bellows type steam trap comprising a top plate (70) of.
The method of claim 3, wherein
Bellows type steam trap, characterized in that it comprises a spring (80) formed between the lower plate (60) and the upper plate (70) surrounding the upper outer peripheral surface of the central shaft portion (50).
The method of claim 1,
Bellows type steam trap, characterized in that the projection (51) is further formed on the outer circumferential surface of the upper predetermined position of the central shaft portion 50, the projection is inserted into the central groove portion 32 of the upper flange (30).
The method of claim 1,
The lower portion of the lower flange 40, the lower portion of the plug 41 is formed downward, the lower end of the plug is composed of a spherical member 42, the spherical member 42 is formed below the inner space 11 of the housing Bellows type steam trap corresponding to the discharge hole of the discharge nozzle (90).
The method of claim 6,
The discharge nozzle 90 communicates with the outlet through an inner conduit consisting of a horizontal conduit 91 and a vertical conduit 92 communicating with each other, the starting point of the horizontal conduit communicates with the exhaust nozzle, and the end point of the vertical conduit Bellows type steam trap, characterized in that in communication with.
The method of claim 3, wherein
Bellows-type steam trap, characterized in that the inlet is in communication with the housing inner space (11) between the upper plate (70) and the lower plate (60).

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