WO2011058706A1 - Appareil a soupape reducteur de pression - Google Patents

Appareil a soupape reducteur de pression Download PDF

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Publication number
WO2011058706A1
WO2011058706A1 PCT/JP2010/006283 JP2010006283W WO2011058706A1 WO 2011058706 A1 WO2011058706 A1 WO 2011058706A1 JP 2010006283 W JP2010006283 W JP 2010006283W WO 2011058706 A1 WO2011058706 A1 WO 2011058706A1
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WO
WIPO (PCT)
Prior art keywords
coil spring
pressure reducing
reducing valve
valve device
side space
Prior art date
Application number
PCT/JP2010/006283
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English (en)
Japanese (ja)
Inventor
中込正
Original Assignee
日本発條株式会社
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 日本発條株式会社 filed Critical 日本発條株式会社
Publication of WO2011058706A1 publication Critical patent/WO2011058706A1/fr

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    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D16/00—Control of fluid pressure
    • G05D16/04—Control of fluid pressure without auxiliary power
    • G05D16/10—Control of fluid pressure without auxiliary power the sensing element being a piston or plunger

Definitions

  • the present invention relates to a pressure reducing valve device.
  • the conventional pressure reducing valve device includes a valve seat, a valve body, a valve stem, a compression coil spring, and the like.
  • the valve seat is disposed in the primary space of the ventilation path.
  • the valve body is provided so as to be able to contact and separate from the opening end of the valve seat.
  • the compression coil spring urges the valve body in a direction to approach the opening end of the valve seat via a valve rod that presses the valve body. Therefore, when the valve is closed, the valve body is pressed against the opening end of the valve seat, closes the opening end of the valve seat, and closes the ventilation path.
  • the compression coil spring is generally a so-called closed end in which the end winding portion (the end portion of the coil spring) is in contact with the adjacent winding portion. This is because the closed-end compression coil spring has good load accuracy and stability when attached.
  • the surface of the compression coil spring is subjected to a shot peening treatment in order to give a compressive residual stress.
  • the closed-end compression coil spring cannot be subjected to sufficient shot peening treatment at the contact portion between the end winding portion and the adjacent winding portion, and the compression coil spring is easily broken.
  • hydrogen embrittlement of a compression coil spring proceeds due to a passing hydrogen sulfide gas or the like, and the compression coil spring is easily broken.
  • the present invention has been made to solve the above-described problems, and an object thereof is to improve the durability of the coil spring in the pressure reducing valve device.
  • the pressure reducing valve device is configured such that when the differential pressure obtained by subtracting the internal pressure of the secondary side space from the internal pressure of the primary side space rises to a predetermined value or more, A pressure reducing valve device for letting gas escape to the secondary space, wherein the valve body for blocking or communicating the primary side space and the secondary side space is formed so that adjacent winding portions do not contact each other. And a compression coil spring which has been subjected to shot peening treatment on the surface and biases the valve body in a direction to shut off the primary side space and the secondary side space. And
  • the durability of the coil spring can be improved in the pressure reducing valve device.
  • FIG. 1 is a longitudinal sectional view of a pressure reducing valve device according to a first embodiment of the present invention. It is a perspective view of the coiled spring before attaching to the pressure-reduction valve apparatus which concerns on the 1st Embodiment of this invention. It is the table
  • FIG. 1 is a longitudinal sectional view of the pressure reducing valve device.
  • the pressure reducing valve device 10 is installed so as to connect, for example, two pipes (primary side pipe and secondary side pipe) (not shown) provided in an oil plant or a chemical plant.
  • two pipes primary side pipe and secondary side pipe
  • the pressure reducing valve device 10 releases the gas in the primary side pipe into the secondary side pipe. Play a role.
  • corrosive gas such as hydrogen sulfide generated in the process of petroleum refining flows.
  • the pressure reducing valve device 10 has a primary side space 14 and a secondary side space 16 in a valve box 12.
  • the primary side space 14 communicates with the inside of the primary side pipe via the inlet 18, and the secondary side space 16 communicates with the inside of the secondary side pipe via the outlet 20.
  • the pressure reducing valve device 10 includes a valve seat 22, a valve body 24, a valve rod 26, a coil spring (valve spring) 30 and the like in the valve box 12.
  • the valve seat 22 is formed in a ring shape, and the primary side space 14 extends in the ring.
  • the valve body 24 is provided so that the opening end of the valve seat 22 can be opened and closed. When the valve is closed, the valve body 24 is disposed so as to close the opening end of the valve seat 22, and partitions the primary side space 14 and the secondary side space 16.
  • One end of the valve rod 26 is fixed to the surface of the valve body 24 on the secondary space 16 side, and extends coaxially with the valve seat 22 in the secondary space 16.
  • the coil spring 30 is provided in the secondary space 16 and is disposed coaxially with the valve stem 26 on the outer periphery of the valve stem 26.
  • the coil spring 30 is sandwiched between a first spring receiver 32 fixed to the valve stem 26 and a second spring receiver 34 fixed to the valve box 12 and attached in a state compressed in the axial direction of the valve stem 26. It has been. That is, the valve body 24 is urged by the coil spring 30 via the first spring receiver 32 and the valve rod 26 in a direction approaching the valve seat 22, and is pressed against the open end of the valve seat 22.
  • the valve body 24 resists the elastic force of the coil spring 30 from the opening end of the valve seat 22.
  • the valve is opened apart and the gas in the primary space 14 flows into the secondary space 16. In this way, the pressure reducing valve device 10 reduces the abnormal internal pressure generated in the primary side space 14 and prevents failure or breakage of the plant equipment.
  • the position of the second spring receiver 34 with respect to the first spring receiver 32 can be adjusted, whereby the elastic force of the coil spring 30, that is, the valve is opened.
  • the internal pressure of the power primary space 14 can be adjusted.
  • FIG. 2 is a perspective view of the coil spring before being attached to the pressure reducing valve device.
  • the coil spring 30 is obtained, for example, by plastically deforming a wire rod into a coil shape by hot working, performing heat treatment such as quenching and tempering, and further subjecting the surface to shot peening treatment.
  • the coil spring 30 is, for example, 5 turns, and is formed in a cylindrical shape so that adjacent winding portions 36 do not contact each other. That is, both end portions (end winding portions) 38 of the coil spring 30 are open ends.
  • FIG. 3 is a table showing the number of breakage days by the FIP test of the coil spring.
  • FIG. 4 is a table showing the conditions of the shot peening process performed on the surface of the coil spring.
  • FIG. 5 is a table showing the composition of the developed coil spring material.
  • the FIP test is a test to investigate stress corrosion cracking of steel that has been hydrogenated using a corrosion reaction (Michihiko Nagumo, “Basics of Hydrogen Embrittlement: Hydrogen Behavior and Embrittlement Mechanism”, Uchida Otsukuraku Publishing, 2008 December, p. 135).
  • the coil springs according to Samples 1 to 7 were immersed in a 50 wt% ammonium thiocyanate aqueous solution in a compressed state at room temperature, and the number of days until the coil spring was broken was recorded.
  • the coil springs according to Samples 1 to 7 are designed so that the wire diameter (wire diameter) is 8 mm, the outer diameter (coil spring diameter) is 68 mm, and the free height is 90 mm.
  • both ends of the coil spring 30 according to the samples 1 to 6 are open ends, whereas both ends of the coil spring according to the sample 7 are closed ends. Yes.
  • the coil springs according to samples 1 to 7 are subjected to shot peening. As shown in FIG. 3, normal shot peening is applied to the surface of the coil springs according to samples 1, 5, 6 and 7, and hard shot peening is applied to the surface of the coil springs according to samples 2 to 4. Processing has been applied.
  • the coil springs according to Samples 1, 2, and 7 are made of SUP10, which is a general spring steel material.
  • the coil springs according to Samples 3 to 6 are made of a high-strength suspension spring steel material (referred to as “developed material”) developed for use in the pressure reducing valve device 10.
  • the developed material is, in weight%, C: 0.35-0.55, Si: 1.60-2.20, Mn: 0.10-1.00, P: 0.030 or less, S: 0.030 or less, Cu: 0.30 or less, Ni: 0.20 to 0.80, Cr: 0.80 to 1.10, V: 0.05 to 0.25, Ti : Fe-based alloy containing 0.03-0.12 with the balance being Fe and inevitable impurities.
  • the coil spring 30 formed in the open end is not in contact with the adjacent winding portion 36 with the end winding portion 38, and therefore the shot peening process is sufficiently performed at the end portion (end winding portion) of the coil spring 30.
  • the surface of the coil spring 30 is hardened, the surface stress that becomes the starting point of fracture is made uniform, durability is improved, and delayed fracture due to hydrogen embrittlement is suppressed. Therefore, in the pressure reducing valve device 10 according to the present embodiment, the breakage of the coil spring 30 is suppressed and the durability of the coil spring 30 is high as compared with the conventional pressure reducing valve device.
  • the rise of the load curve of the open-end coil spring 30 becomes nonlinear, but in the pressure reducing valve device 10, the differential pressure obtained by subtracting the internal pressure of the secondary side space 16 from the internal pressure of the primary side space 14.
  • the load curve does not need to be linear because the valve body 24 may be separated from the open end of the valve seat 22 against the elastic force of the coil spring 30.
  • the open-end coil spring 30 may be damaged by the impact of the contact of the end portion (end winding portion) 38 of the coil spring 30 with the adjacent winding portion 36 at the time of compressive load. There is. However, since the pressure reducing valve device (particularly, the safety valve device) 10 operates only at the time of abnormality and does not constantly operate repeatedly, there is little possibility that the coil spring 30 is damaged.
  • the coil spring 30 subjected to the hard shot peening process has a longer breakage days than the coil spring 30 subjected to the normal shot peening process.
  • the coil spring 30 made of the developed material has a longer breakage time than the coil spring made of SUP10. This is thought to be because delayed fracture due to hydrogen embrittlement is suppressed.
  • FIG. 6 is a perspective view of the coil spring before being attached to the pressure valve device.
  • this embodiment is a modification of 1st Embodiment, Comprising: The same code
  • the coil spring 30 is a barrel coil spring and is open-ended. Since the helical coil spring is used, the end portion (end turn portion) 38 of the coil spring 30 is in contact with the adjacent winding portion 36 at the time of compressive load, and there is no fear that the contact portion is damaged. As compared with the pressure reducing valve device 10 according to the embodiment, breakage of the coil spring 30 can be further suppressed. That is, in the pressure reducing valve device 10 according to the present embodiment, the coil spring 30 is not easily broken even when a compressive load is constantly and repeatedly applied.
  • SYMBOLS 10 Pressure reducing valve apparatus, 12 ... Valve box, 14 ... Primary side space, 16 ... Secondary side space, 18 ... Inlet, 20 ... Outlet, 22 ... Valve seat, 24 ... Valve body, 30 ... Compression coil spring 32 ... 1st spring receiver, 34 ... 2nd spring receiver, 36 ... winding part, 38 ... end winding part

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Safety Valves (AREA)
  • Springs (AREA)

Abstract

L'invention concerne un appareil à soupape réducteur de pression (10) qui est doté d'un siège de soupape (22), d'un corps de soupape (24), d'une tige de soupape (26), d'un ressort de compression (30), et analogue, à l'intérieur d'un carter de soupape (12), et qui libère les gaz d'un premier espace (14) dans un second espace (16) lorsque la pression différentielle, qui est la différence entre la pression interne du second espace (16) et la pression interne du premier espace (14), augmente jusqu'à au moins un niveau prescrit. Le corps de soupape (24) est disposé de manière à pouvoir ouvrir et fermer l'extrémité ouverte du siège de soupape (22), coupant ou reliant ainsi le premier espace (14) et le second espace (16). Le ressort de compression (30), formé de manière que les sections enroulées avoisinantes (36) ne se touchent pas, présente une surface écrouie à la grenaille, et pousse le corps de soupape (24) dans la direction de coupure du premier espace (14) et du second espace (16).
PCT/JP2010/006283 2009-11-11 2010-10-22 Appareil a soupape reducteur de pression WO2011058706A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-258020 2009-11-11
JP2009258020A JP2011102617A (ja) 2009-11-11 2009-11-11 減圧弁装置

Publications (1)

Publication Number Publication Date
WO2011058706A1 true WO2011058706A1 (fr) 2011-05-19

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JP (1) JP2011102617A (fr)
WO (1) WO2011058706A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104180033A (zh) * 2014-08-01 2014-12-03 浙江恒华阀门有限公司 活塞平衡式压力释放阀

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016194592A (ja) * 2015-03-31 2016-11-17 キヤノン株式会社 定着装置

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57186757U (fr) * 1981-05-22 1982-11-26
JPS5867847A (ja) * 1981-10-17 1983-04-22 Aichi Steel Works Ltd 耐へたり性の優れたばね用鋼
JPS61114177U (fr) * 1976-11-15 1986-07-18
JPH02133578A (ja) * 1988-11-14 1990-05-22 Sumitomo Metal Ind Ltd β型Ｔｉ合金製スプリングの製造方法
JPH05320948A (ja) * 1992-05-20 1993-12-07 Sumitomo Electric Ind Ltd チタン合金製コイルばねの製造方法
JPH06137353A (ja) * 1992-10-27 1994-05-17 Nhk Spring Co Ltd チタン合金製ばね及びその製造方法
JPH09144918A (ja) * 1995-11-20 1997-06-03 Matsushita Electric Ind Co Ltd 弁
JPH10251748A (ja) * 1997-03-12 1998-09-22 Chuo Spring Co Ltd 耐久性に優れた弁ばねの製造方法
JPH11241143A (ja) * 1997-11-17 1999-09-07 Chuo Spring Co Ltd 耐腐食疲労強度を向上させたばね
WO2004085685A1 (fr) * 2003-03-26 2004-10-07 Chuo Hatsujo Kabushiki Kaisha Procede de production d'un ressort presentant une resistance elevee
WO2006022009A1 (fr) * 2004-08-26 2006-03-02 Daido Tokushuko Kabushiki Kaisha Acier pour ressort à forte résistance, ressort à forte résistance et son procédé de fabrication
JP2007127227A (ja) * 2005-11-04 2007-05-24 Nhk Spring Co Ltd 中空ばね
JP2008020061A (ja) * 2006-06-13 2008-01-31 Kyosan Denki Co Ltd 圧力調整弁

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61114177U (fr) * 1976-11-15 1986-07-18
JPS57186757U (fr) * 1981-05-22 1982-11-26
JPS5867847A (ja) * 1981-10-17 1983-04-22 Aichi Steel Works Ltd 耐へたり性の優れたばね用鋼
JPH02133578A (ja) * 1988-11-14 1990-05-22 Sumitomo Metal Ind Ltd β型Ｔｉ合金製スプリングの製造方法
JPH05320948A (ja) * 1992-05-20 1993-12-07 Sumitomo Electric Ind Ltd チタン合金製コイルばねの製造方法
JPH06137353A (ja) * 1992-10-27 1994-05-17 Nhk Spring Co Ltd チタン合金製ばね及びその製造方法
JPH09144918A (ja) * 1995-11-20 1997-06-03 Matsushita Electric Ind Co Ltd 弁
JPH10251748A (ja) * 1997-03-12 1998-09-22 Chuo Spring Co Ltd 耐久性に優れた弁ばねの製造方法
JPH11241143A (ja) * 1997-11-17 1999-09-07 Chuo Spring Co Ltd 耐腐食疲労強度を向上させたばね
WO2004085685A1 (fr) * 2003-03-26 2004-10-07 Chuo Hatsujo Kabushiki Kaisha Procede de production d'un ressort presentant une resistance elevee
WO2006022009A1 (fr) * 2004-08-26 2006-03-02 Daido Tokushuko Kabushiki Kaisha Acier pour ressort à forte résistance, ressort à forte résistance et son procédé de fabrication
JP2007127227A (ja) * 2005-11-04 2007-05-24 Nhk Spring Co Ltd 中空ばね
JP2008020061A (ja) * 2006-06-13 2008-01-31 Kyosan Denki Co Ltd 圧力調整弁

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104180033A (zh) * 2014-08-01 2014-12-03 浙江恒华阀门有限公司 活塞平衡式压力释放阀

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