WO2016013427A1 - Purgeur automatique de vapeur d'eau - Google Patents

Purgeur automatique de vapeur d'eau Download PDF

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Publication number
WO2016013427A1
WO2016013427A1 PCT/JP2015/069902 JP2015069902W WO2016013427A1 WO 2016013427 A1 WO2016013427 A1 WO 2016013427A1 JP 2015069902 W JP2015069902 W JP 2015069902W WO 2016013427 A1 WO2016013427 A1 WO 2016013427A1
Authority
WO
WIPO (PCT)
Prior art keywords
small diameter
drain
cleaning member
steam trap
discharge port
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2015/069902
Other languages
English (en)
Japanese (ja)
Inventor
小池正
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TLV Co Ltd
Original Assignee
TLV Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TLV Co Ltd filed Critical TLV Co Ltd
Priority to JP2016501701A priority Critical patent/JP6022733B2/ja
Publication of WO2016013427A1 publication Critical patent/WO2016013427A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16T—STEAM TRAPS OR LIKE APPARATUS FOR DRAINING-OFF LIQUIDS FROM ENCLOSURES PREDOMINANTLY CONTAINING GASES OR VAPOURS
    • F16T1/00—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers
    • F16T1/20—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by floats
    • F16T1/22—Steam traps or like apparatus for draining-off liquids from enclosures predominantly containing gases or vapours, e.g. gas lines, steam lines, containers with valves controlled by floats of closed-hollow-body type

Definitions

  • This application relates to a steam trap that discharges drain generated in a steam piping system or the like.
  • a steam trap having a cleaning mechanism for removing foreign matter clogged in a drain (condensate) discharge port is known.
  • This cleaning mechanism includes a displacement member (temperature responsive member) that is displaced by a change in temperature, and a rod-like operation member that moves forward and backward to the discharge port by the displacement of the displacement member.
  • the displacement member is provided in a discharge passage through which the drain discharged from the discharge port flows. In this cleaning mechanism, when the drain is discharged, the displacement member is heated by the drain and the operation member is retracted.
  • the displacement member is displaced due to a temperature drop, and the operation member advances by the displacement and enters the discharge port. By the entry of the operation member, the foreign matter clogged in the discharge port is removed.
  • the cleaning mechanism can automatically clean the discharge port without human operation.
  • the steam trap as described above has a problem that it takes time for the draining operation to be performed at the start of operation. That is, in the steam trap when the operation is stopped, since there is no circulation of the drain, the displacement member of the cleaning mechanism is displaced due to the temperature drop, and the operation member enters the discharge port. Therefore, in the steam trap at the start of operation, the discharge port is almost closed by the operation member, and the drain cannot be discharged quickly.
  • the technology disclosed in the present application has been made in view of such circumstances, and an object thereof is to provide a steam trap having a cleaning mechanism that can shorten the time required for drain discharge operation at the start of operation.
  • the technology disclosed in the present application includes a casing having a drain discharge port, a displacement member provided at a position where the drain discharged from the discharge port circulates, and a displacement member that is displaced by a temperature change. It is premised on a steam trap provided with a rod-shaped cleaning member that moves forward and backward from the outside of the navel to remove foreign matter from the discharge port. And the ratio of the cross-sectional area of the part which approachs the said discharge port of the said cleaning member with respect to the opening area of the said discharge port is 0.3 or more and 0.8 or less.
  • the cleaning member since the ratio of the cross-sectional area of the portion that enters the discharge port of the cleaning member to the opening area of the discharge port is set to 0.8 or less, the cleaning member enters the discharge port. When it does, the clearance gap which can fully discharge
  • the ratio of the cross-sectional area of the portion entering the discharge port of the cleaning member with respect to the opening area of the discharge port is set to 0.3 or more, the foreign substance removing function by the cleaning member can be ensured. That is, according to the steam trap of the present application, when the cleaning member enters the discharge port clogged with foreign matter, first, the foreign matter in the central region through which the cleaning member passes is pushed out and removed. Then, the drain is discharged from the opening formed by removing the foreign matter. Since the flow of the drain discharged from the opening is high speed, the remaining foreign matter is removed by the high speed flow of the drain. In this way, foreign substances clogged in the discharge port can be removed.
  • the range in which such effects can be obtained is the lower limit value of the ratio of the cross-sectional area of the cleaning member to the opening area of the discharge port.
  • FIG. 1 is a cross-sectional view illustrating a schematic configuration of a steam trap according to an embodiment.
  • FIG. 2 is an enlarged sectional view showing a schematic configuration of the cleaning mechanism.
  • FIG. 3 is an enlarged cross-sectional view illustrating a schematic configuration of the cleaning mechanism.
  • FIG. 4 is an enlarged cross-sectional view illustrating a schematic configuration of the cleaning mechanism.
  • the steam trap 1 of the present embodiment constitutes a float type steam trap, and is provided in, for example, a steam system, and automatically discharges drain (condensate) generated by condensation of steam.
  • the steam trap 1 includes a casing 10 that is a sealed container, and a cleaning mechanism 20.
  • the casing 10 has a lid portion 12 fastened to a main body portion 11 with bolts, and a valve chamber 13 is formed inside.
  • the main body 11 has a drain inflow passage 14.
  • the casing 10 also has a discharge passage 17 formed across the main body 11 and the lid 12.
  • the inflow passage 14 communicates with the upper portion of the valve chamber 13.
  • a valve seat 15 that is screwed to the lid portion 12 is provided at the lower portion of the valve chamber 13.
  • a discharge passage 16 that communicates with the discharge passage 17 is formed in the valve seat 15.
  • the discharge passage 16 is a straight passage, and includes a small diameter portion 16a, a tapered portion 16b, a medium diameter portion 16c, and a large diameter portion 16d that are sequentially formed from the valve chamber 13 side.
  • the small-diameter portion 16a of the discharge passage 16 is a drain discharge port according to the claims of the present application, and constitutes a so-called orifice.
  • the valve chamber 13 is provided with a hollow spherical float 18 in a free state.
  • the float 18 opens and closes the discharge passage 16 of the valve seat 15 by being separated from and seated on the valve chamber side end surface of the valve seat 15.
  • the lid 12 is provided with a float seat 19 with which the float 18 comes into contact with the discharge passage 16 being closed. Note that two float seats 19 are provided on the front side and the other side in FIG. In the steam trap 1, the drain that flows into the valve chamber 13 from the inflow passage 14 is discharged from the discharge passage 16 (small diameter portion 16 a) of the valve seat 15 and flows out through the discharge passage 17.
  • the cleaning mechanism 20 automatically removes foreign matter adhering to the small diameter portion 16a of the discharge passage 16, and is provided on the lid portion 12 as shown in FIG. That is, the cleaning mechanism 20 is located outside the valve chamber 13.
  • the cleaning mechanism 20 includes a case 21, a bimetal 22, and a cleaning member 30.
  • the case 21 is formed in a substantially cylindrical shape, and is screwed on the same axis as the valve seat 15 in the lid portion 12.
  • a bimetal 22 is accommodated in the case 21.
  • the bimetal 22 has a plate shape in which two kinds of metals or alloys having different thermal expansion coefficients are firmly bonded, and constitutes a displacement member according to the claims of the present application. That is, the bimetal 22 is a temperature responsive member that bends (displaces) in response to a temperature change.
  • the bimetal 22 of the present embodiment is formed in a double spiral shape by further spirally winding a strip-shaped bimetal flat plate.
  • the bimetal 22 has a small radius and a long length when the temperature is low, and a large radius and a short length when the temperature is high. That is, the bimetal 22 expands and contracts in the axial direction due to temperature changes.
  • the cleaning mechanism 20 is configured such that drain discharged from the discharge passage 16 of the valve seat 15 flows into the case 21. That is, the bimetal 22 is provided at a position where the drain discharged from the small diameter portion 16a of the discharge passage 16 flows and is exposed to the discharged drain.
  • the cleaning member 30 is formed in a rod shape with a circular cross section and is accommodated in the case 21.
  • the cleaning member 30 is provided so as to be coaxial with the case 21.
  • the cleaning member 30 includes a base portion 31 and an operation portion 32 that are continuously formed in the axial direction.
  • the operation portion 32 is located on the valve seat 15 side and is formed with a smaller diameter than the base portion 31.
  • the cleaning member 30 has a base 31 inserted into the bimetal 22.
  • An adjustment member 23 is screwed to one end of the case 21.
  • One end of the bimetal 22 is fixed to the adjustment member 23, and the other end is fixed to a receiving portion 31 a formed on the base portion 31 of the cleaning member 30.
  • the receiving portion 31 a is an annular plate provided in the circumferential direction of the base portion 31, and supports the other end of the bimetal 22 at its end surface.
  • the cleaning member 30 is configured to advance and retract from the outside to the small-diameter portion 16a of the discharge passage 16 by the displacement of the bimetal 22 to remove foreign matters in the small-diameter portion 16a. That is, the cleaning member 30 moves in the axial direction by the expansion and contraction operation due to the temperature change of the bimetal 22. Specifically, when the bimetal 22 extends due to a temperature drop, the receiving portion 31a is pushed by the bimetal 22 and the cleaning member 30 moves forward (moves toward the small diameter portion 16a side of the discharge passage 16).
  • the receiving portion 31a is pulled by the bimetal 22, and the cleaning member 30 moves backward (moves away from the small diameter portion 16a of the discharge passage 16).
  • the end portion of the base portion 31 of the cleaning member 30 is slidably inserted into a guide hole 24 formed in the adjustment member 23.
  • the operation portion 32 of the cleaning member 30 is formed with a small diameter portion 34 (tip portion) and a large diameter portion 33 in order from the small diameter portion 16a side of the discharge passage 16.
  • the small diameter portion 34 has a diameter (thickness) smaller than that of the large diameter portion 33 and is a portion that enters the small diameter portion 16 a of the discharge passage 16.
  • a tapered portion 37 is formed which becomes gradually thinner as it goes to the small diameter portion 34.
  • the cross-sectional area A1 (hereinafter referred to as the cross-sectional area A1 of the cleaning member 30) of the small-diameter portion 34 of the operation portion 32 and the opening area A2 of the small-diameter portion 16a of the discharge passage 16 (hereinafter referred to as the opening area A2 of the discharge passage 16). And a certain relationship. Specifically, as shown in FIG. 4, the ratio (A1 / A2) of the cross-sectional area A1 of the cleaning member 30 to the opening area A2 of the discharge passage 16 is set to 0.3 or more and 0.8 or less.
  • the steam trap 1 of the present embodiment when operating (when the steam system is operating), high-temperature drain flows in and is discharged. That is, high-temperature drain flows in the steam trap 1.
  • the cleaning mechanism 20 the bimetal 22 is exposed to high-temperature drain, and the temperature rises to 90 ° C. or more, for example. Therefore, as shown in FIG. 2, the bimetal 22 is shortened, and thereby the cleaning member 30 is retracted. Therefore, the small diameter portion 16a of the discharge passage 16 is fully opened.
  • FIG. 3 shows a case where the temperature of the bimetal 22 is slightly lowered (for example, to 80 ° C.), and the tip of the operation part 32 of the cleaning member 30 and the outer end face of the small diameter part 16a of the discharge passage 16 are flush with each other. It becomes a state.
  • FIG. 4 shows a case where the temperature of the bimetal 22 is further lowered (for example, to 70 ° C. or less), and the tip of the operation portion 32 of the cleaning member 30 protrudes from the small diameter portion 16 a of the discharge passage 16.
  • the cleaning member 30 since the ratio of the cross sectional area A1 of the cleaning member 30 to the opening area A2 of the discharge passage 16 is set to 0.3 or more, the cleaning member 30 enters the small diameter portion 16a of the discharge passage 16 as described above. As a result, the foreign matter clogged in the small diameter portion 16a can be removed. That is, when the cleaning member 30 enters the small-diameter portion 16a clogged with foreign matter, first, the foreign matter in the central region through which the cleaning member 30 (small-diameter portion 34 of the operation unit 32) passes is pushed out and removed. Is done. Then, the drain is discharged from the opening formed by removing the foreign matter. Since the flow of the drain discharged from the opening is high speed, the remaining foreign matter is removed by the high speed flow of the drain. In this way, foreign substances clogged in the small diameter portion 16a of the discharge passage 16 can be removed.
  • the cleaning member 30 since the ratio of the cross-sectional area A1 of the cleaning member 30 to the opening area A2 of the discharge passage 16 is set to 0.8 or less, the cleaning member 30 has a small diameter of the discharge passage 16. Even in a state of entering the portion 16a, a gap that can sufficiently discharge the low-temperature drain can be formed between the small diameter portion 16a and the cleaning member 30. Therefore, the low temperature drain can be quickly discharged from the steam trap 1 at the start of operation. Therefore, the time taken for the low temperature drain discharge operation can be shortened.
  • the ratio (A1 / A2) of the transverse area A1 of the cleaning member 30 to the opening area A2 of the discharge passage 16 is set within a predetermined range. It is possible to reduce the time required for the drain discharge operation at the start of operation while securing the foreign matter removing function by the above.
  • the technique disclosed in the present application is useful for a steam trap having a cleaning mechanism for removing foreign matter adhering to a drain outlet.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)

Abstract

Le but de la présente invention est de fournir un purgeur automatique de vapeur d'eau équipé d'un mécanisme de nettoyage capable de raccourcir le temps nécessaire pour les actions de décharge de drainage lors de la mise en service. Le purgeur automatique de vapeur d'eau (1) comporte : un boîtier (10) avec une section de petit diamètre (16a), qui est un orifice de décharge de drainage ; une bilame (22), qui est située à une position à travers laquelle s'écoule le drainage déchargé à partir de la section de petit diamètre (16a) et qui est déplacée en raison de variations de température ; et un élément de nettoyage en forme de tige (30) pour enlever les corps étrangers dans la section de petit diamètre (16a) en avançant et en se rétractant à partir de l'extérieur de la section de petit diamètre (16a) suite au déplacement de la bilame (22). La proportion de la surface de section transversale (A1) de la partie de l'élément de nettoyage (30) qui entre dans la section de petit diamètre (16a) par rapport à la surface (A2) de l'ouverture de la section de petit diamètre (16a) est de 0,3 à 0,8.
PCT/JP2015/069902 2014-07-23 2015-07-10 Purgeur automatique de vapeur d'eau Ceased WO2016013427A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2016501701A JP6022733B2 (ja) 2014-07-23 2015-07-10 スチームトラップ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-150055 2014-07-23
JP2014150055 2014-07-23

Publications (1)

Publication Number Publication Date
WO2016013427A1 true WO2016013427A1 (fr) 2016-01-28

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PCT/JP2015/069902 Ceased WO2016013427A1 (fr) 2014-07-23 2015-07-10 Purgeur automatique de vapeur d'eau

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JP (1) JP6022733B2 (fr)
WO (1) WO2016013427A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023076273A (ja) * 2021-11-22 2023-06-01 株式会社テイエルブイ スチームトラップ及び異物除去工具

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007138984A (ja) * 2005-11-15 2007-06-07 Tlv Co Ltd フロート式スチームトラップ
WO2008107967A1 (fr) * 2007-03-06 2008-09-12 Tlv Co., Ltd. Dispositif de soupape de type flotteur et procédé de nettoyage d'un dispositif de soupape de type flotteur

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0740794Y2 (ja) * 1990-07-13 1995-09-20 株式会社テイエルブイ オリフィストラップ

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007138984A (ja) * 2005-11-15 2007-06-07 Tlv Co Ltd フロート式スチームトラップ
WO2008107967A1 (fr) * 2007-03-06 2008-09-12 Tlv Co., Ltd. Dispositif de soupape de type flotteur et procédé de nettoyage d'un dispositif de soupape de type flotteur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023076273A (ja) * 2021-11-22 2023-06-01 株式会社テイエルブイ スチームトラップ及び異物除去工具
JP7780179B2 (ja) 2021-11-22 2025-12-04 株式会社テイエルブイ スチームトラップ及び異物除去工具

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JP6022733B2 (ja) 2016-11-09
JPWO2016013427A1 (ja) 2017-04-27

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