Bellows-type steam trap structured to enlarge bellows expansion and contraction range, and bellows valve assembly of bellows-type steam trap

Abstract

The present invention relates to a bellows-type steam trap structured to enlarge a bellows expansion and contraction range, and a bellows valve assembly of the bellows-type steam trap. An auxiliary expansion fluid accommodation space part for accommodating an expansion fluid is further provided inside an upper flange of the bellows valve assembly so as to be filled with twice or more the amount of the expansion fluid such that the bellows expansion and contraction range can be enlarged to significantly increase the operating force of a bellows and the discharge amount of condensed water, thereby enabling product performance to be improved.

Description

Bellows-type steam trap with expanded bellows expansion range structure and bellows valve assembly of the bellows-type steam trap

[0001] The present invention relates to a bellows-type steam trap having a bellows expansion range expansion structure, and more specifically, to a bellows-type steam trap having a bellows expansion range expansion structure, which further includes an auxiliary expansion fluid receiving space for receiving expansion fluid on the inside of an upper flange of a bellows valve assembly, thereby filling the amount of expansion fluid by more than twice, thereby expanding the expansion range of the bellows, thereby significantly increasing the operating force of the bellows and the discharge amount of condensate, thereby improving product performance, and a bellows valve assembly of the bellows-type steam trap.

[0002] Steam traps are generally used primarily in heat exchange systems, and are a type of automatic valve-like device designed to efficiently remove condensate generated by condensation of steam in a drum or pipe, 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 to which an inlet pipe is connected on one side and an outlet to which a discharge pipe is connected on the other side, and a passage through which steam passes between the inlet and the outlet; a bellows valve assembly installed on the steam trap body so that the passage is opened or closed by expansion or contraction due to 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 on the steam trap body to limit the position of the spring.

[0005] However, since the conventional bellows-type steam trap has a structure in which expansion fluid is filled only inside the bellows, there is a technical limitation in that the amount of expansion fluid filled is limited, making it impossible to increase the operating power of the bellows and the discharge amount of condensate.

[0006] The present invention has been invented to improve the above-mentioned problem, 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, which further includes an auxiliary expansion fluid receiving space for receiving expansion fluid on the inside of the upper flange of the bellows valve assembly, thereby filling the amount of expansion fluid by more than twice, thereby expanding the expansion range of the bellows, thereby significantly increasing the operating force of the bellows and the discharge amount of condensate, thereby improving product performance, and a bellows valve assembly of the bellows-type steam trap.

[0007]

[0008] The technical problems of the present invention are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0009] In order to achieve the above object, a bellows-type steam trap with a bellows expansion range expansion structure according to the present invention comprises: a steam trap body having an inlet to which an inlet pipe is connected on one side and an outlet to which a discharge pipe is connected on the other side, and a flow channel through which steam passes between the inlet and the outlet; a bellows valve assembly installed on the steam trap body so that the flow channel opens and closes as it expands or contracts due to 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 for limiting the position of the spring; wherein the bellows valve assembly comprises a bellows configured to be elastic and having a main expansion fluid receiving space for receiving an expansion fluid therein; There is a technical feature comprising: an upper flange fixed to one side of the bellows and having an auxiliary expansion fluid receiving space for receiving expansion fluid therein; a lower flange fixed to the other side of the bellows; and a ball plunger installed on the lower flange so as to selectively block the flow path.

[0010]

[0011] In addition, an expansion fluid injection port may be formed on one side of the upper flange, and a gasket bolt may be fastened to the expansion fluid injection port to form a sealing structure.

[0012]

[0013] In addition, a mounting protrusion is formed on the inlet side of the expansion fluid inlet, on which the head of the gasket bolt is mounted, a contact protrusion is formed on the bottom surface of the mounting protrusion, and the auxiliary expansion fluid receiving space is formed inside the upper flange adjacent to the expansion fluid inlet.

[0014]

[0015] Additionally, a nozzle may be installed in the above-mentioned euro, and the nozzle may be configured to have a diameter of 6 mm at 10 bar steam.

[0016] As described above, the present invention has the following effects.

[0017] First, by providing an additional auxiliary expansion fluid receiving space for receiving expansion fluid on the inside of the upper flange of the bellows valve assembly, and filling in more than twice the amount of expansion fluid, the expansion range of the bellows can be expanded, thereby significantly increasing the operating power of the bellows and the discharge amount of condensate, thereby improving product performance.

[0018] Second, by providing an auxiliary expansion fluid receiving space for receiving expansion fluid on the inside of the upper flange of the bellows valve assembly and filling the amount of expansion fluid by more than twice, the condensate discharge amount can be increased by more than four times compared to the conventional bellows assembly, thereby improving product performance.

[0019]

[0020] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0021] Figure 1 is an exploded perspective view showing a bellows-type steam trap with a bellows expansion range expansion structure according to a preferred embodiment of the present invention.

[0022] FIG. 2 is an exemplary diagram showing the closure of the flow path due to the expansion of the bellows in a bellows-type steam trap with a bellows expansion range expansion structure according to a preferred embodiment of the present invention.

[0023] FIG. 3 is an exemplary diagram showing the opening of the flow path due to contraction of the bellows in a bellows-type steam trap with a bellows expansion range expansion structure according to a preferred embodiment of the present invention.

[0024] Figure 4 is a perspective view and a front view showing a bellows valve assembly of the present invention.

[0025] Figure 5 is a perspective view and a front view showing an upper flange in a bellows valve assembly of the present invention.

[0026] Figure 6 is a perspective view and a front view showing a bellows in a bellows valve assembly of the present invention.

[0027] Figure 7 is a perspective view and a cross-sectional view showing a lower flange and a ball plunger in a bellows valve assembly of the present invention.

[0028] Figure 8 is a perspective view and a cross-sectional view showing a gasket bolt of the present invention.

[0029] Hereinafter, with reference to the attached drawings, a bellows-type steam trap and bellows assembly having a bellows expansion range expansion structure according to a preferred embodiment of the present invention will be described in detail.

[0030] FIG. 1 is an exploded perspective view showing a bellows-type steam trap with a bellows expansion range expansion structure according to a preferred embodiment of the present invention, FIG. 2 is an exemplary view showing passage closure due to expansion of the bellows in a bellows-type steam trap with a bellows expansion range expansion structure according to a preferred embodiment of the present invention, and FIG. 3 is an exemplary view showing passage opening due to contraction of the bellows in a bellows-type steam trap with a bellows expansion range expansion structure according to a preferred embodiment of the present invention. FIG. 4 is a perspective view and a front view showing a bellows valve assembly of the present invention. FIG. 5 is a perspective view and a front view showing an upper flange in a bellows valve assembly of the present invention. FIG. 6 is a perspective view and a front view showing a bellows in a bellows valve assembly of the present invention. FIG. 7 is a perspective view and a cross-sectional view showing 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 showing the gasket bolt of the present invention.

[0031] In the drawing, the unexplained symbol R represents a sealing to prevent leakage of fluids such as steam, condensate, and gas. Since this corresponds to a known technology, a description thereof is omitted.

[0032] Referring to the drawing above, a bellows-type steam trap (1) having a bellows expansion range expansion 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 capture condensate generated in the inlet pipe (P1) and discharge the captured condensate to a condensate discharge pipe (condensate discharge pipe) (P2).

[0033] A bellows-type steam trap (1) having a bellows expansion range expansion structure according to a preferred embodiment of the present invention further includes an auxiliary expansion fluid receiving space (121) for receiving expansion fluid on the inside of the upper flange (120) of the bellows valve assembly (100), thereby filling the amount of expansion fluid by more than twice, thereby expanding the expansion range of the bellows (110), thereby significantly increasing the operating power of the bellows (110) and the discharge amount of condensate.

[0034] A bellows-type steam trap (1) having a bellows expansion range expansion 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).

[0035] An inlet (11) is formed on one side of the steam trap body (10) to which an inlet pipe (P1) is connected, and an outlet (12) is formed on the other side of the steam trap body (10) to which a discharge pipe (P2) is connected, and a passage (13) through which steam passes is formed between the inlet (11) and the discharge (12). It is configured so that fluids such as steam, condensate, and gas are discharged through the passage (13) formed between the inlet (11) and the discharge (12).

[0036] A space (14) is formed within the above-mentioned euro (13) in which a bellows valve assembly (100) is installed. The space (14) may be formed to be inclined, for example, at an angle of about 65-80° toward the inlet (11), to facilitate installation and replacement of the bellows valve assembly (100).

[0037] A filter (60) having a plurality of holes is installed on the outside of the bellows valve assembly (100) so as to remove foreign substances contained in fluids such as steam, condensate, and gas flowing through the passage (13), and also, since the fluid such as steam, condensate, and gas contacts the filter (60) before contacting the bellows (110), the shock to the bellows (110) is alleviated, thereby preventing damage to the bellows (110) due to repeated sudden contact with the fluid.

[0038] The above gasket bolt (20) is fixedly installed in the bellows valve assembly (100).

[0039] The above spring (30) serves to elastically support the bellows valve assembly (100). The above spring (30) elastically supports the bellows valve assembly (100) so that it can respond to rapid pressure changes in a boiler, etc.

[0040] The above cap (40) is installed on the steam trap body (10) to limit the position of the spring (30).

[0041] The above bellows valve assembly (100) is installed inside the steam trap body (10) so that the passage (13) is opened and closed by expansion or contraction due to the latent heat of steam flowing into the passage (13).

[0042]

[0043] Hereinafter, the configuration of the bellows valve assembly (100) of the present invention will be described in detail.

[0044] The bellows valve assembly (100) of the present invention comprises: a bellows (110) configured to be flexible and having a main expansion fluid receiving space (111) for receiving expansion fluid therein; an upper flange (120) fixed to one side of the bellows (110) and having an auxiliary expansion fluid receiving space (121) for receiving expansion fluid therein; a lower flange (130) fixed to the other side of the bellows (110); and a ball plunger (140) installed on the lower flange (130) so as to selectively block a flow path (13).

[0045] The above bellows (110) opens or closes the flow path (13) by expanding or contracting depending on the temperature of the fluid, thereby controlling the flow of fluid such as steam, condensate, or gas.

[0046] The bellows (110) may be formed of any material that can expand or contract depending on the temperature of the fluid, and examples thereof include synthetic resin or metal, and an expanding fluid (which expands or contracts depending on the temperature of the surroundings) is accommodated inside it.

[0047] The bellows (110) is preferably made of stainless steel, nickel, or a chromium alloy. Nickel or chromium has relatively excellent thermal conductivity, so a bellows formed of a nickel or chromium alloy can smoothly expand or contract depending on the temperature of the fluid.

[0048]

[0049] An expansion fluid injection port (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 injection port (122) to form a sealing structure.

[0050] Referring to FIG. 5, a mounting protrusion (123) is formed on the inlet side of the expansion fluid injection port (122) to which the head (21) (shown in FIG. 8) of the gasket bolt (20) is mounted, a contact protrusion (124) is formed on the bottom surface of the mounting protrusion (123), and an auxiliary expansion fluid receiving space (121) is formed inside the upper flange (120) adjacent to the expansion fluid injection port (122).

[0051] A nozzle (50) (shown in FIGS. 2 and 3) is installed in the above-mentioned euro (13). For example, the nozzle (50) can be configured to have a diameter (inner diameter) of 6 mm for 10 bar steam.

[0052]

[0053] The operation of a bellows-type steam trap (1) having a bellows expansion range expansion structure according to a preferred embodiment of the present invention configured as described above is described as follows.

[0054] A bellows-type steam trap (1) having a bellows expansion range expansion structure according to a preferred embodiment of the present invention is installed in a portion of a heat exchange system (e.g., boiler) where steam, condensate, gas, etc. are to be discharged, and the flow path (13) is normally kept open.

[0055] That is, when the heat exchange system is in operation, the bellows (110) remains in a contracted state until a certain pressure is reached, and at this time, steam, condensate, gas, etc. generated in the heat exchange system are discharged through the flow path (13).

[0056] When the heat exchange system reaches a certain temperature, 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 to block the nozzle (50).

[0057] After a certain period of time, as fluids such as steam, condensate, and gas cannot pass through the passage (13), the bellows (110) is cooled and returns to its original state while shrinking, thereby causing the passage (13) to be converted to an open state again.

[0058] In a bellows-type steam trap (1) having a 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 on the inside of the upper flange (120) of the bellows valve assembly (100) so that the amount of expansion fluid is filled in more than twice, thereby further expanding the expansion range of the bellows (110), thereby significantly increasing the operating power of the bellows (110) and the discharge amount of condensate.

[0059]

[0060] Table 1 below is a table comparing and explaining the bellows assembly of the present invention with the conventional bellows assembly.

[0061] As can be confirmed in Table 1, in the bellows assembly of the present invention, the bellows expansion coefficient is 3.64 mm / 100°C, the nozzle diameter is 6 mm, the steam pressure is 10 bar, the saturation temperature is 184.15°C, the setting temperature is 174.15°C, the bellows operating force is 3.34 kgf, and in terms of the influence of flow interference, the indirect coefficient was confirmed to be 1 or more, confirming that there was no influence of flow interference, and the condensate discharge amount was confirmed to be 2970 kg / h.

[0062] In this way, it was confirmed that the bellows assembly of the present invention further expands the expansion range of the bellows, and that the condensate discharge amount is more than four times that of the conventional bellows assembly.

[0063] 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 upper flange None 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) 2.827kgf (6mm nozzle) Bellows operating force generated at 174.15℃ 1.11kgf 3.34kgf Condensate discharge 692kg / h 2970kg / h

[0064] As described above, the present invention has the following effects.

[0065] First, by providing an auxiliary expansion fluid receiving space for receiving expansion fluid on the inside of the upper flange of the bellows valve assembly, and filling the amount of expansion fluid by more than twice, the expansion range of the bellows can be expanded, thereby significantly increasing the operating power of the bellows and the discharge amount of condensate, thereby improving product performance.

[0066] Second, by providing an auxiliary expansion fluid receiving space for receiving expansion fluid on the inside of the upper flange of the bellows valve assembly and filling the amount of expansion fluid by more than twice, the condensate discharge amount can be increased by more than four times compared to the conventional bellows assembly, thereby improving product performance.

[0067]

[0068] Meanwhile, the present specification and drawings disclose preferred embodiments of the present invention, and although specific terms are used, they are used only in a general sense to easily explain the technical contents of the present invention and to help understanding of the invention, and are not intended to limit the scope of the present invention.

[0069] It will be apparent to those skilled in the art that other modifications based on the technical idea of ​​the present invention are possible in addition to the embodiments disclosed herein.

[0070] [Explanation of symbols]

[0071] 1: Bellows-type steam trap

[0072] 11: Inlet

[0073] 12: Exhaust

[0074] 13: Euro

[0075] 10: Steam trap body

[0076] 20: Gasket bolt

[0077] 21: Head of gasket bolt

[0078] 30: Spring

[0079] 40: Cap

[0080] 50: Nozzle

[0081] 100: Bellows valve assembly

[0082] 110: Bellows

[0083] 111: Main expansion fluid receiving space

[0084] 120: Upper flange

[0085] 121: Auxiliary expansion fluid receiving space

[0086] 122: Expansion fluid inlet

[0087] 123: Anchoring jaw

[0088] 124: Close-fitting protrusion

[0089] 130: Lower flange

[0090] 140: Ball plunger

[0091] P1: Inlet pipe

[0092] P2: Exhaust pipe

Claims

1. A bellows-type steam trap (1) comprising: 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 a discharge pipe (P2), and a passage (13) formed between the inlet (11) and the outlet (12) through which steam passes; a bellows valve assembly (100) installed on the steam trap body (10) so that the passage (13) is opened or closed by expansion or contraction due to 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 on the steam trap body (10) to limit the position of the spring (30); The above bellows valve assembly (100) It comprises: a bellows (110) configured to be flexible and having a main expansion fluid receiving space (111) for receiving an expansion fluid therein; 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 therein; a lower flange (130) fixed to the other side of the bellows (110); and a ball plunger (140) installed on the lower flange (130) so as to selectively block the flow path (13); An expansion fluid injection port (122) is formed on the inner periphery of the upper flange (120), and a gasket bolt (20) is fastened to the expansion fluid injection port (122) to form a sealing structure. A mounting protrusion (123) is formed on the upper side of the expansion fluid injection port (122) to which the head (21) of the gasket bolt (20) is mounted, and a sealing protrusion (124) is formed on the bottom surface of the mounting protrusion (123) to prevent expansion fluid leakage. The interior of the upper flange (120) is expanded to a relatively larger diameter than the expansion fluid injection port (122) at a location adjacent to the expansion fluid injection port (122), thereby further expanding the auxiliary expansion fluid receiving space (121). A bellows-type steam trap having a bellows expansion range expansion structure, characterized in that it is configured to further expand the expansion range of the bellows (110) by filling more expansion fluid into the auxiliary expansion fluid receiving space (121) to expand the operating power of the bellows (110) and the discharge amount of condensate.

2. In the bellows valve assembly of the bellows type steam trap described in paragraph 1, A bellows (110) configured to be flexible and having a main expansion fluid receiving space (111) for receiving an expansion fluid therein; 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 therein; a lower flange (130) fixed to the other side of the bellows (110); and a ball plunger (140) installed on the lower flange (130) so as to selectively block the flow path (13); An expansion fluid injection port (122) is formed on the inner periphery of the upper flange (120), and a gasket bolt (20) is fastened to the expansion fluid injection port (122) to form a sealing structure. A mounting protrusion (123) is formed on the upper side of the expansion fluid injection port (122) to which the head (21) of the gasket bolt (20) is mounted, and a sealing protrusion (124) is formed on the bottom surface of the mounting protrusion (123) to prevent expansion fluid leakage. The interior of the upper flange (120) is expanded to a relatively larger diameter than the expansion fluid injection port (122) at a location adjacent to the expansion fluid injection port (122), thereby further expanding the auxiliary expansion fluid receiving space (121). A bellows valve assembly of a bellows-type steam trap, characterized in that it is configured to further expand the expansion range of the bellows (110) by filling more expansion fluid into the auxiliary expansion fluid receiving space (121) to expand the operating force of the bellows (110) and the discharge amount of condensate.

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