Bellows type steam trap having expanding structure the scope of expansion and bellows valve assembly its

Abstract

The present invention relates to a bellows-type steam trap having a bellows expansion range expansion structure and a bellows valve assembly of the bellows-type steam trap. By further providing an auxiliary expansion fluid receiving space for receiving expansion fluid inside the upper flange of the bellows valve assembly, and by filling the amount of expansion fluid more than twice as much, the expansion range of the bellows can be expanded, thereby significantly increasing the operating force of the bellows and the discharge amount of condensate, which can improve product performance.

Description

Technology Field

[0001] The present invention relates to a bellows-type steam trap with a bellows expansion range expansion structure, and more specifically, to a bellows-type steam trap with a bellows expansion range expansion structure and a bellows valve assembly of the bellows-type steam trap, wherein the bellows expansion range is expanded by further providing an auxiliary expansion fluid receiving space for receiving expansion fluid inside the upper flange of the bellows valve assembly, thereby increasing the amount of expansion fluid by more than double, and thus significantly increasing the operating force of the bellows and the discharge amount of condensate, thereby improving product performance. Background Technology

[0002] Generally, steam traps are primarily used in heat exchange systems and are devices similar to automatic valves designed to efficiently remove condensate generated by the condensation of steam inside drums or pipes, and to prevent steam leakage.

[0003] Prior art Patent Registration No. 10-2122443 discloses a bellows-type steam trap for expanding the extension range of the bellows.

[0004] A conventional bellows-type steam trap comprises: a steam trap body having an inlet formed on one side to which an inlet pipe is connected and an outlet formed on the other side to which an outlet pipe is connected, and a passage for steam to pass through between the inlet and the outlet; a bellows valve assembly installed in the steam trap body to open and close the passage by expanding or contracting due to the latent heat of steam introduced into the passage; a gasket bolt fixed to the bellows valve assembly; a spring for elastically supporting the bellows valve assembly; and a cap installed in the steam trap body to limit the position of the spring.

[0005] However, conventional bellows-type steam traps have a technical limitation in that, since the expansion fluid is filled only inside the bellows, the amount of expansion fluid filled is restricted, making it impossible to increase the operating force of the bellows and the discharge volume of condensate. Prior art literature

[0006] Korean Patent Registration No. 10-2122443 The problem to be solved

[0007] The present invention was developed to improve the above-mentioned problems, and the problem to be solved by the present invention is to provide a bellows-type steam trap with a bellows expansion range expansion structure and a bellows valve assembly of the bellows-type steam trap, which can improve product performance by expanding the bellows expansion range and significantly increasing the bellows operating force and condensate discharge amount by further providing an auxiliary expansion fluid receiving space for receiving expansion fluid inside the upper flange of the bellows valve assembly and filling the amount of expansion fluid more than twice as much.

[0009] The technical problems of the present invention are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art from the description below. means of solving the problem

[0010] To achieve the above objective, a bellows-type steam trap having a bellows expansion range expansion structure according to the present invention comprises: a steam trap body having an inlet formed on one side to which an inlet pipe is connected and an outlet formed on the other side to which an outlet pipe is connected, and a flow channel formed between the inlet and the outlet through which steam passes; a bellows valve assembly installed on the steam trap body to open or close the flow channel by expanding or contracting due to the latent heat of steam introduced into the flow channel; a gasket bolt fixed to the bellows valve assembly; a spring for elastically supporting the bellows valve assembly; and a cap installed on the steam trap body to limit the position of the spring; wherein the bellows valve assembly is configured to be expandable and has a bellows having a main expansion fluid receiving space for receiving an expansion fluid inside. The technical features include: an upper flange fixed to one side of the bellows and having an auxiliary expansion fluid receiving space for receiving an expansion fluid inside; a lower flange fixed to the other side of the bellows; and a ball plunger installed on the lower flange to selectively block the flow path.

[0012] In addition, an expansion fluid injection port is formed on one side of the upper flange, and the structure may be configured such that a gasket bolt is fastened to the expansion fluid injection port to seal it.

[0014] In addition, a seating ledge is formed on the inlet side of the expansion fluid injection port to accommodate the head of the gasket bolt, a contact projection is formed on the bottom surface of the seating ledge, and an auxiliary expansion fluid receiving space is formed inside the upper flange adjacent to the expansion fluid injection port.

[0016] In addition, a nozzle is installed in the above-mentioned Euro, and the nozzle may be configured to have a diameter of 6 mm for 10 bar steam. Effects of the invention

[0017] As explained above, the present invention has the following effects.

[0018] First, by further providing an auxiliary expansion fluid receiving space on the inner side of the upper flange of the bellows valve assembly to receive expansion fluid, and by filling the amount of expansion fluid more than twice as much, the expansion range of the bellows can be expanded, thereby significantly increasing the operating force of the bellows and the discharge amount of condensate, which can improve product performance.

[0019] Second, by further providing an auxiliary expansion fluid receiving space on the inner side of the upper flange of the bellows valve assembly to receive expansion fluid, and thereby filling the amount of expansion fluid by more than double, the condensate discharge amount can be increased by more than four times compared to a conventional bellows assembly, thereby improving product performance.

[0021] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description in the claims. Brief explanation of the drawing

[0022] FIG. 1 is an exploded perspective view illustrating a bellows-type steam trap with a bellows expansion range structure according to a preferred embodiment of the present invention. FIG. 2 is an exemplary diagram showing the closure of the flow path due to the extension of the bellows in a bellows-type steam trap with a bellows expansion range structure according to a preferred embodiment of the present invention. FIG. 3 is an exemplary diagram showing the opening of a flow path due to the contraction of the bellows in a bellows-type steam trap with a bellows expansion range structure according to a preferred embodiment of the present invention. FIG. 4 is a perspective view and a front view illustrating a bellows valve assembly of the present invention. FIG. 5 is a perspective view and a front view illustrating an upper flange in a bellows valve assembly of the present invention. FIG. 6 is a perspective view and a front view illustrating a bellows in a bellows valve assembly of the present invention. FIG. 7 is a perspective view and a cross-sectional view illustrating a lower flange and a ball plunger in a bellows valve assembly of the present invention. FIG. 8 is a perspective view and a cross-sectional view illustrating a gasket bolt of the present invention. Specific details for implementing the invention

[0023] Hereinafter, a bellows-type steam trap and a bellows assembly having a bellows expansion range expansion structure according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0024] FIG. 1 is an exploded perspective view illustrating a bellows-type steam trap with a bellows expansion range structure according to a preferred embodiment of the present invention; FIG. 2 is an illustrative diagram showing the closure of the flow path due to the extension of the bellows in a bellows-type steam trap with a bellows expansion range structure according to a preferred embodiment of the present invention; FIG. 3 is an illustrative diagram showing the opening of the flow path due to the contraction of the bellows in a bellows-type steam trap with a bellows expansion range structure according to a preferred embodiment of the present invention. FIG. 4 is a perspective view and a front view illustrating a bellows valve assembly of the present invention. FIG. 5 is a perspective view and a front view illustrating an upper flange in a bellows valve assembly of the present invention. FIG. 6 is a perspective view and a front view illustrating a bellows in a bellows valve assembly of the present invention. FIG. 7 is a perspective view and a cross-sectional view illustrating a lower flange and a ball plunger in a bellows valve assembly of the present invention. And FIG. 8 is a perspective view and a cross-sectional view illustrating the gasket bolt of the present invention.

[0025] In the drawing, the unexplained symbol R represents a sealing to prevent fluid leakage, such as steam, condensate, or gas; as this falls under known technology, a description thereof is omitted.

[0026] Referring to the drawing above, a bellows-type steam trap (1) with a bellows expansion range structure according to a preferred embodiment of the present invention is connected to an inlet pipe (steam pipe) (P1) through which steam is transported, and is configured to collect condensate generated in the inlet pipe (P1) and to discharge the collected condensate through a condensate discharge pipe (condensate discharge pipe) (P2).

[0027] A bellows-type steam trap (1) with a bellows expansion range expansion structure according to a preferred embodiment of the present invention further comprises an auxiliary expansion fluid receiving space (121) for receiving expansion fluid inside the upper flange (120) of the bellows valve assembly (100) and by filling the amount of expansion fluid more than twice, the expansion range of the bellows (110) can be expanded, thereby greatly increasing the operating force of the bellows (110) and the amount of condensate discharged.

[0028] A bellows-type steam trap (1) with a bellows expansion range structure according to a preferred embodiment of the present invention comprises a steam trap body (10); a bellows valve assembly (100); a gasket bolt (20); a spring (30); and a cap (40).

[0029] An inlet (11) is formed on one side of the steam trap body (10) to connect an inlet pipe (P1), and an outlet (12) is formed on the other side of the steam trap body (10) to connect an outlet pipe (P2). A passage (13) through which steam passes is formed between the inlet (11) and the outlet (12). The device is configured so that a fluid, such as steam, condensate, or gas, is discharged through the passage (13) formed between the inlet (11) and the outlet (12).

[0030] A space (14) for installing a bellows valve assembly (100) is formed within the above Euro (13). The space (14) is formed to be inclined toward the inlet (11) side, for example, at about 65-80°, so that mounting and replacing the bellows valve assembly (100) can be made easy.

[0031] A filter (60) having a plurality of holes is installed on the outer side of the above bellows valve assembly (100) to remove foreign substances contained in fluids such as steam, condensate, and gas flowing through the flow path (13), and also to mitigate the impact on the bellows (110) by having the fluids such as steam, condensate, and gas come into contact with the filter (60) before coming into contact with the bellows (110), thereby preventing damage to the bellows (110) caused by repeated sudden contact with the fluid.

[0032] The above gasket bolt (20) is fixedly installed on the bellows valve assembly (100).

[0033] The above spring (30) serves to elastically support the bellows valve assembly (100). The above spring (30) elastically supports the bellows valve assembly (100) to respond to sudden pressure changes, such as those in a boiler.

[0034] The above cap (40) is installed on the steam trap body (10) to limit the position of the spring (30).

[0035] The above bellows valve assembly (100) is installed inside a steam trap body (10) so that the flow path (13) opens or closes as it expands or contracts due to the latent heat of steam introduced into the flow path (13).

[0037] Hereinafter, the configuration of the bellows valve assembly (100) of the present invention will be described in detail.

[0038] The bellows valve assembly (100) of the present invention comprises: a bellows (110) configured to be expandable and having a main expansion fluid receiving space (111) for receiving an expansion fluid inside; an upper flange (120) fixed to one side of the bellows (110) and having an auxiliary expansion fluid receiving space (121) for receiving an expansion fluid inside; a lower flange (130) fixed to the other side of the bellows (110); and a ball plunger (140) installed on the lower flange (130) to selectively block the flow path (13).

[0039] The above bellows (110) expands or contracts according to the temperature of the fluid, thereby opening or closing the flow path (13) to control the flow of fluids such as steam, condensate, and gas.

[0040] The bellows (110) may be formed of any material that can expand or contract depending on the temperature of the fluid, such as synthetic resin or metal, and contains an expanding fluid (which expands or contracts depending on the ambient temperature).

[0041] The bellows (110) is preferably made of stainless steel, nickel, or chromium alloy. Since nickel or chromium has relatively good thermal conductivity, the bellows formed from the nickel or chromium alloy can smoothly expand or contract depending on the temperature of the fluid.

[0043] An expansion fluid inlet (122) (shown in FIG. 5) is formed on one side of the upper flange (120), and a gasket bolt (20) is fastened to the expansion fluid inlet (122) to seal it.

[0044] Referring to FIG. 5, the structure is formed such that a seating ledge (123) is formed on the inlet side of the expansion fluid injector (122) to which the head portion (21) (shown in FIG. 8) of the gasket bolt (20) is seated, a contact projection (124) is formed on the bottom surface of the seating ledge (123), and an auxiliary expansion fluid receiving space (121) is formed inside the upper flange (120) adjacent to the expansion fluid injector (122).

[0045] A nozzle (50) (shown in FIG. 2 and FIG. 3) is installed in the above Euro (13), and, for example, the nozzle (50) can be configured to have a diameter (inner diameter) of 6 mm for 10 bar steam.

[0047] The operation of the bellows-type steam trap (1) with a bellows expansion range structure according to a preferred embodiment of the present invention configured as described above is as follows.

[0048] A bellows-type steam trap (1) with a bellows expansion range structure according to a preferred embodiment of the present invention is installed in a part of a heat exchange system (e.g., a boiler) to discharge steam, condensate, gas, etc., and normally maintains the flow path (13) in an open state.

[0049] That is, when the heat exchange system is in operation, the bellows (110) remains in a contracted state until a constant pressure is reached, and at this time, steam, condensate, gas, etc. generated in the heat exchange system are discharged through the flow path (13).

[0050] When the heat exchange system reaches a certain pressure, the bellows (110) expands due to the latent heat of the fluid, such as steam, condensate, or gas. Due to the expansion of the bellows (110), the ball plunger (140) of the lower flange (130) moves downward and blocks the nozzle (50).

[0051] After a certain period of time, as fluids such as steam, condensate, and gas are prevented from passing through the flow path (13), the bellows (110) cools down and returns to its original state and shrinks, and as a result, the flow path (13) is switched back to an open state.

[0052] In the bellows-type steam trap (1) of the bellows expansion range expansion structure according to a preferred embodiment of the present invention, an auxiliary expansion fluid receiving space (121) for receiving expansion fluid is further provided inside the upper flange (120) of the bellows valve assembly (100) to receive expansion fluid, thereby filling the amount of expansion fluid more than twice, so that the expansion range of the bellows (110) is further expanded, and the operating force of the bellows (110) and the amount of condensate discharged can be greatly increased.

[0054] Table 1 below is a table comparing a conventional bellows assembly and the bellows assembly of the present invention.

[0055] As can be seen in Table 1, in the bellows assembly of the present invention, the bellows expansion coefficient is 3.64 mm / 100℃, the nozzle diameter is 6 mm, the steam pressure is 10 bar, the saturation temperature is 184.15℃, and the setting temperature is 174.15℃, the bellows operating force is 3.34 kgf, and regarding the influence of flow path interference, the indirect coefficient was confirmed to be 1 or greater, confirming that there is no influence of flow path interference, and the condensate discharge amount was confirmed to be 2970 kg / h.

[0056] As such, it was confirmed that the bellows assembly of the present invention further expands the expansion range of the bellows, and the condensate discharge amount is more than four times that of a conventional bellows assembly.

[0057] item Conventional bellows assembly Bellows assembly of the present invention Ball plunger diameter 6.35mm 11.11mm Nozzle diameter 3mm 6mm Internal expansion fluid space of the upper flange doesn't exist Auxiliary expansion fluid receiving space Amount of expansion fluid 3.9cc 8.6cc Bellows expansion coefficient 1.66mm / 100℃ 3.64mm / 100℃ Bellows operating force required for operation (10 bar steam) 0.707kgf (3mm nozzle) 2.827 kgf (6 mm nozzle) Bellows operating force generated at 174.15℃ 1.11kgf 3.34kgf Condensate discharge 692 kg / h 2970kg / h

[0059] As explained above, the present invention has the following effects.

[0060] First, by further providing an auxiliary expansion fluid receiving space on the inner side of the upper flange of the bellows valve assembly to receive expansion fluid, and by filling the amount of expansion fluid by more than double, the expansion range of the bellows can be expanded, thereby significantly increasing the operating force of the bellows and the discharge amount of condensate, which can improve product performance.

[0061] Second, by further providing an auxiliary expansion fluid receiving space on the inner side of the upper flange of the bellows valve assembly to receive expansion fluid, and thereby filling the amount of expansion fluid by more than double, the condensate discharge amount can be increased by more than four times compared to a conventional bellows assembly, thereby improving product performance.

[0063] Meanwhile, the present specification and drawings disclose preferred embodiments of the present invention. Although specific terms have been used, they are used merely in a general sense to facilitate the explanation of the technical content of the invention and to aid in understanding the invention, and are not intended to limit the scope of the invention.

[0064] It is obvious to those skilled in the art that, in addition to the embodiments disclosed herein, other variations based on the technical concept of the present invention are possible. Explanation of the symbols

[0065] 1: Bellows-type steam trap 11: Inlet 12: Outlet 13: Euro 10: Steam trap body 20: Gasket bolt 21: Head of the gasket bolt 30: Spring 40: Cap 50: Nozzle 100: Bellows valve assembly 110: Bellows 111: Main expansion fluid receiving space 120: Upper flange 121: Auxiliary expansion fluid receiving space 122: Expansion fluid inlet 123: Settlement jig 124: Close-fitting protrusion 130: Lower flange 140: Ball plunger P1: Inlet pipe P2: Discharge pipe

Claims

Claim 1 A steam trap body (10) having an inlet (11) formed on one side to connect an inlet pipe (P1) and an outlet (12) formed on the other side to connect an outlet pipe (P2), and a passage (13) through which steam passes between the inlet (11) and the outlet (12); a bellows valve assembly (100) installed in the steam trap body (10) to open and close the passage (13) by expanding or contracting due to the latent heat of steam introduced into the passage (13); a gasket bolt (20) fixed to the bellows valve assembly (100); a spring (30) for elastically supporting the bellows valve assembly (100); and a cap (40) installed in the steam trap body (10) to limit the position of the spring (30). A bellows-type steam trap (1) comprising: a bellows valve assembly (100) configured to be expandable and having a main expansion fluid receiving space (111) for receiving an expansion fluid inside; an upper flange (120) fixed to one side of the bellows (110) and having an auxiliary expansion fluid receiving space (121) for receiving an expansion fluid inside; a lower flange (130) fixed to the other side of the bellows (110); and a ball plunger (140) installed on the lower flange (130) to selectively block the flow path (13); a bellows-type steam trap having a bellows expansion range expansion structure. Claim 2 A bellows-type steam trap with a bellows expansion range expansion structure, characterized in that, in claim 1, an expansion fluid inlet (122) is formed on one side of the upper flange (120), and the gasket bolt (20) is fastened to the expansion fluid inlet (122) to seal it. Claim 3 A bellows-type steam trap with a bellows expansion range expansion structure, characterized in that, in the second paragraph, a seating ledge (123) is formed on the inlet side of the expansion fluid inlet (122) to which the head portion (21) of the gasket bolt (20) is seated, a contact projection (124) is formed on the bottom surface of the seating ledge (123), and an auxiliary expansion fluid receiving space (121) is formed inside the upper flange (120) adjacent to the expansion fluid inlet (122). Claim 4 A bellows-type steam trap with a bellows expansion range structure, characterized in that, in claim 1, a nozzle (50) is installed in the above-mentioned Euro (13), and the nozzle (50) is configured to have a diameter (inner diameter) of 6 mm for 10 bar steam. Claim 5 A bellows valve assembly of a bellows-type steam trap described in any one of claims 1 to 4, comprising: a bellows (110) configured to be expandable and having a main expansion fluid receiving space (111) for receiving an expansion fluid inside; an upper flange (120) fixed to one side of the bellows (110) and having an auxiliary expansion fluid receiving space (121) for receiving an expansion fluid inside; a lower flange (130) fixed to the other side of the bellows (110); and a ball plunger (140) installed on the lower flange (130) to selectively block the flow path (13).

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