KR20160081079A

KR20160081079A - Steam trap valve

Info

Publication number: KR20160081079A
Application number: KR1020140194279A
Authority: KR
Inventors: 강정호; 장상찬; 허재용; 최인규
Original assignee: 동아대학교 산학협력단
Priority date: 2014-12-30
Filing date: 2014-12-30
Publication date: 2016-07-08

Abstract

The present invention relates to a steam trap valve, in which the orifice can be opened and closed by using a contact of a U-shaped bimetal instead of a float, thereby reducing the cost of a float and eliminating the need for a screen.
The present invention has a first valve chamber formed on an inlet port side with an inner partition wall therebetween, and a second valve chamber formed on an outlet port side, and a flow of fluid between the first valve chamber and the second valve chamber is formed below the partition wall A valve casing having an orifice for permitting; The other end of the first valve chamber is fixed to the upper side of the orifice. The other end of the first valve chamber is provided to cross the first valve chamber. When the temperature of the orifice is lower than a predetermined temperature, Wherein the orifice is closed by the operation of the bimetal when the steam having a predetermined temperature or more flows into the first valve chamber, When the condensed water or the non-condensable gas below the temperature flows into the first valve chamber, the orifice is opened by the expanding operation of the bimetal so that the condensed water or non-condensable gas is discharged.

Description

Steam trap valve {STEAM TRAP VALVE}

The present invention relates to a steam trap valve, and more particularly, to a steam trap valve that can open and close an orifice by using a U-shaped bimetal instead of a float, thereby reducing the cost of a float and requiring no installation of a screen .

Generally, a steam trap for discharging condensed water generated by the influence of a low temperature external temperature of steam in a steam pipe supplied by a constant pressure is installed in a steam using appliance, a steam pipe, and the like.

That is, the steam trap is a kind of automatic valve designed to remove condensate and prevent steam from leaking out. Therefore, the steam trap system must be capable of removing air and non-condensable gases and should be operated to ensure the performance of the system as a whole and to save energy. If steam is leaked from the steam trap, the heat of the steam is released, energy is lost, and the pressure in the condensate return pipe is increased. As a result, the pressure of the other steam trap connected to the steam trap is affected, The efficiency becomes poor. Also, if the condensate is not properly discharged, water hammer may occur and this may lead to a shortening of the lifetime of the valve and the main pipe.

Here, the steam trap automatically discharges only the condensed water from the steam transfer pipe, and is provided in various ways. Particularly, float type, disk type, bimetal type, bucket type, orifice type and the like are mainly used.

The flow-type steam trap discharges condensed water using a difference in density between steam and condensed water, and is not greatly affected by sudden fluctuations in pressure and flow rate, but can be damaged by freezing.

When the condensed water is high in the steam trap, the disk-type steam trap lowers the temperature in the trap and lowers the pressure in the variable pressure chamber, so that the disk is lifted and the condensed water is discharged.

When the condensed water is high in the steam trap, the temperature of the trap is lowered and the ball valve is opened by the action of the bimetal to discharge the condensed water. The bimetal of the bimetallic steam trap is made of two kinds of metals having different thermal expansion ratios and is bent by the temperature change.

The bucket type steam trap closes the valve seat by the drain valve. However, when the condensate flows in the inlet and the condensate flows into the bucket, the bucket sinks and the drain valve directly connected to the bucket is opened. Condensate in the bucket is discharged.

The orifice type steam trap is a principle to prevent leakage of steam when the discharged condensed water keeps occupying the orifice hole.

Among the steam traps described above, the orifice type steam traps are economical and most widely used because of minimizing steam leakage, requiring no actuators, having a small heat generating area, and having a high heat transfer coefficient with respect to a heating body.

In Korean Patent Laid-Open Publication No. 1984-0006518, a pair of outlets are provided in a valve casing, a spherical float is accommodated in a valve chamber formed in the valve casing, and the float moves up and down according to the liquid level of the valve chamber A float valve for opening and closing a valve hole disposed at an upper portion or a lower portion of the valve chamber has been disclosed.

1, an inlet member 12 having an inlet 24 and an outlet 25 at the bottom of the valve casing members 10 and 11, that is, an upper portion of the valve casing, The member 13 is mounted, and a hemispheric strainer 28 is mounted on the inside of the inlet valve casing member 10. A valve seat member 21 having a valve hole 27 is attached to a lower portion of the hemispherical partition member 20 and a float guide member 15 for guiding the float 14 is mounted on the valve seat member 21 And one end of the U-shaped bimetal 29 is fitted between the valve seat member 21 and the partition member 20. A cylindrical upper end portion of the partition member 20 is welded to the valve casing members 10 and 11 so that a passage 23 is formed between the partition member 20 and the outlet valve casing member 11 and between the partition member 20 and the inlet side A valve chamber (26) is formed between the valve casing members (10). A float steam trap for vertical piping is obtained by rotating the valve seat member 21, the float guide member 15 and the bimetal 29 in the structure of the horizontal steam float steam trap by 180 degrees with respect to the axis of the valve seat member.

However, in the case of such a conventional float steam trap, when the float has a very small diameter tolerance in a form in which the surface of the float and the orifice (valve orifice 27) are in direct contact with each other, normal operation is possible, and a float in which stainless steel is floated It is necessary to manufacture a float because the thickness is extremely thin and welding and surface treatment with high technology are required. Therefore, there is a problem that a float needs to be installed in order to less impact the flow of the condensed water.

Korean Patent Publication No. 1984-0006518 (November 30, 1984)

Accordingly, it is an object of the present invention to provide an apparatus and a method for opening and closing an orifice using a U-shaped bimetal instead of a float, thereby reducing the cost of a float, In which the steam trap valve is installed.

According to an aspect of the present invention, there is provided a steam trap valve comprising a first valve chamber formed on an inlet port side with an inner partition wall therebetween, and a second valve chamber formed on an outlet port side, A valve casing having an orifice for allowing a flow of fluid between the first valve chamber and the second valve chamber; The other end of the first valve chamber is fixed to the upper side of the orifice. The other end of the first valve chamber is provided to cross the first valve chamber. When the temperature of the orifice is lower than a predetermined temperature, Wherein the orifice is closed by the operation of the bimetal when the steam having a predetermined temperature or more flows into the first valve chamber, When the condensed water or the non-condensable gas below the temperature flows into the first valve chamber, the orifice is opened by the expanding operation of the bimetal so that the condensed water or non-condensable gas is discharged.

Here, the bimetal may be a U-shaped bimetal.

A first float disposed in a lower portion of the bimetal in the first valve chamber to assist in an upward movement of the bimetal when the condensed water flows into the first valve chamber due to buoyancy to help the orifice open more quickly; And is further provided.

The second float may further include a second float disposed at an upper portion of the bimetal in the first valve chamber to assist the downward deformation of the bimetal when the steam flows into the first valve chamber to help the orifice close more quickly. .

In addition, the second float may have a larger volume and weight than the first float.

The steam trap valve according to the present invention can open or close the orifice by using the contact of the U-shaped bimetal instead of the float, thereby reducing the cost for the float and eliminating the need for the installation of the screen.

FIG. 1 is a cross-sectional view for explaining a conventional steam trap valve
2 is a sectional view for explaining a configuration of a steam trap valve according to an embodiment of the present invention;
3 to 4 are a series of reference drawings for explaining the operation of the steam trap valve according to the embodiment of the present invention.
5 is a sectional view for explaining a configuration of a steam trap valve according to a modified embodiment of the present invention

A steam trap valve according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention, and are actually shown in a smaller scale than the actual dimensions in order to understand the schematic structure.

Also, the terms first and second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. On the other hand, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

FIG. 2 is a sectional view for explaining the construction of a steam trap valve according to an embodiment of the present invention, and FIGS. 3 to 4 are a series of reference views for explaining the operation of the steam trap valve according to the embodiment of the present invention.

The steam trap valve according to the embodiment of the present invention includes a valve casing 110, a bimetal 120, and a first float 130, and the first float 130 And the orifice 113 is opened and closed by using the deformation of the bimetal 120 according to the temperature.

Hereinafter, the steam trap valve according to an embodiment of the present invention will be described in detail with reference to the above-described components.

The valve casing 110 includes an inlet 111 and an outlet 112. The valve casing 110 includes a first valve chamber 110a formed on the inlet 111 side with an inner partition wall therebetween, Sized valve chamber 110b. Further, an orifice 113 for allowing a flow of fluid between the first valve chamber 110a and the second valve chamber 110b is provided below the partition wall. According to the configuration of the valve casing 110, the fluid flows into the first valve chamber 110a through the inlet port 111 and then flows out through the outlet port 112 through the orifice 113 and the second valve chamber 110b. Is formed. In the first valve chamber 110a of the valve casing 110, the bimetal 120 and the first float 130 are provided.

The bimetal 120 is U-shaped as shown in the drawing, and one end of the bimetal 120 is fixed to the upper side of the orifice 113, and the other end of the bimetal 120 is connected to the first valve chamber 110a. And is installed across the interior. The bimetal 120 plays a main role in opening and closing the orifice 113 in place of the existing float and the first float 130 helps the operation of the bimetal 120. For this purpose, the bimetal 120 is closed when the steam having a predetermined temperature or more flows into the first valve chamber 110a as shown in FIG. 2, thereby closing the inlet of the orifice 113, so that the steam can be recovered do. On the other hand, when the non-condensable gas such as condensed water or air flows into the first valve chamber 110a, the bimetal 120 is opened to open the orifice so that the condensed water or non-condensable gas is discharged. . FIGS. 3 and 4 show the case where low-temperature condensed water and non-condensable gas are introduced, respectively.

The first float 130 is provided not to directly open or close the orifice 113 as described above but to assist opening and closing operations of the bimetal 120. 3, the first float 130 is disposed in the lower portion of the bimetal 120 in the first valve chamber 110a. When condensed water flows into the first valve chamber 110a, the first float 130 rises The bimetal 120 is pushed up to help the upward deformation. The opening of the orifice 113 can be quickly performed due to the action of the first float 130. Here, it is noted that the first float 120 is provided for assisting the deformation or operation of the bimetal 120. Therefore, although it is shown that the first float 120 is provided in the drawing, a configuration in which the first float 120 is omitted is also possible.

The operation of the steam trap valve according to the embodiment of the present invention will now be described with reference to the accompanying drawings.

FIG. 2 shows a case where steam is introduced into the first valve chamber 110a through the inlet 111. FIG. In this case, the bimetal 120 is shut down due to the high temperature steam, thus blocking the inlet of the us 113. At this time, since the first float 130 does not receive sufficient buoyancy, it does not affect the bimetal 120 in the lowered state. The bimetal 120 blocks the inlet of the orifice 113 and the vapor introduced into the first valve chamber 110a is blocked from being discharged through the orifice 113. [ This ensures that useful vapors are returned without being drained.

FIG. 3 corresponds to a case where high-temperature steam is introduced immediately before and then condensed water is introduced thereinto. At this time, the bimetal 120 expands and opens the orifice 113 that was blocked. In this case, since the first float 130 rises and the bimetal 120 is lifted up from the beginning of the flow of the condensed water, the opening of the orifice 113 is rapidly performed.

FIG. 4 corresponds to a case where a low-temperature non-condensable gas such as air flows into the first valve chamber 110a through the inlet 111. FIG. In this case, the bimetal 120 is deformed into a flattened state due to the low temperature non-condensable gas to open the orifice 113 inlet. At this time, the unnecessary non-condensable gas introduced into the first valve chamber 110a is discharged through the orifice 113. [

Subsequently, the steam trap valve according to the modified embodiment will be described.

5 is a sectional view for explaining the structure of a steam trap valve according to a modified embodiment of the present invention.

As shown in the drawing, the steam trap valve according to an alternative embodiment of the present invention further includes a second float 140 in addition to the first float 130. The second float 140 is disposed on the upper portion of the bimetal 120 in the first valve chamber 110a and has a larger volume and weight than the first float 130.

According to this structure, when the steam flows into the first valve chamber 110a, the second float 140 pushes down the bimetal 120 by its own weight to assist the deformation. This allows the bimetal 120 to block the inlet of the orifice 113 more quickly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It is clear that the present invention can be suitably modified and applied in the same manner. Therefore, the above description does not limit the scope of the present invention, which is defined by the limitations of the following claims.

110: valve casing 110a: first valve chamber
110b: second valve chamber 120: bimetal
130: first float 140: second float

Claims

And a second valve chamber formed on the side of the outlet port with an inner partition wall therebetween, and an orifice for allowing a flow of fluid between the first valve chamber and the second valve chamber is provided below the partition wall A valve casing;
The other end of the first valve chamber is fixed to the upper side of the orifice. The other end of the first valve chamber is provided to cross the first valve chamber. When the temperature of the orifice is lower than a predetermined temperature, And a bimetal for opening the orifice inlet,
When the steam having a predetermined temperature or higher flows into the first valve chamber, the orifice of the bimetal is operated to close the orifice so that the steam can be recovered.
Wherein when the condensed water or the non-condensable gas below the predetermined temperature flows into the first valve chamber, the orifice is opened by the expanding operation of the bimetal so that the condensed water or non-condensable gas is discharged.

The method according to claim 1,
Wherein the bimetal is a U-shaped bimetal.

The method according to claim 1,
And a first float disposed at a lower portion of the bimetal in the first valve chamber to assist the upward deformation of the bimetal when the condensed water flows into the first valve chamber by buoyancy to help the orifice open more quickly Wherein the steam trap valve is a steam trap valve.

The method of claim 3,
And a second float disposed at an upper portion of the bimetal in the first valve chamber to assist the downward deformation of the bimetal when the steam flows into the first valve chamber to help the orifice close more quickly. Steam trap valve.

5. The method of claim 4,
Wherein the second float has a volume and weight greater than the first float.