EP3234426B1 - Soupape de limitation de pression - Google Patents

Soupape de limitation de pression Download PDF

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Publication number
EP3234426B1
EP3234426B1 EP15816434.3A EP15816434A EP3234426B1 EP 3234426 B1 EP3234426 B1 EP 3234426B1 EP 15816434 A EP15816434 A EP 15816434A EP 3234426 B1 EP3234426 B1 EP 3234426B1
Authority
EP
European Patent Office
Prior art keywords
pressure
housing
closing
receptacle
valve seat
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.)
Active
Application number
EP15816434.3A
Other languages
German (de)
English (en)
Other versions
EP3234426A1 (fr
Inventor
Holger Muehlhoff
Robert Schloeder
Dieter Born
Wasilij Schieder
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to PL15816434T priority Critical patent/PL3234426T3/pl
Publication of EP3234426A1 publication Critical patent/EP3234426A1/fr
Application granted granted Critical
Publication of EP3234426B1 publication Critical patent/EP3234426B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D5/00—Heat treatments of cast-iron
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/06—Surface hardening
    • 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
    • F16K17/0466—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 with a special seating surface
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • 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
    • F16K17/06—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 with special arrangements for adjusting the opening pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7738—Pop valves
    • Y10T137/774—Pop pressure reactor in inflow to valve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7758—Pilot or servo controlled
    • Y10T137/7762—Fluid pressure type

Definitions

  • the invention relates to a pressure relief valve according to the preamble of patent claim 1.
  • the housing is usually made of steel, in particular a solid steel block, with recordings for pressure adjustment and pressure medium channels must be drilled in the housing.
  • bores introduced for manufacturing reasons must also be closed again, since they were only necessary for the production of the boreholes required for operation and would be a hindrance to operation. This customary procedure is complicated in terms of manufacturing technology and therefore cost-intensive.
  • a valve is known with a housing made of nodular cast iron, in which a valve seat made of stainless steel is poured.
  • the valve seat is induction hardened subsequently in the cast-in and machined state in the housing.
  • a valve is known in which a stainless steel ring forming the valve seat is welded into a nodular cast iron housing and the seat surface of the stainless steel valve seat is laser hardened.
  • the housing is made by a casting process.
  • the valve disclosed there has a very large footprint, not least because of a valve seat accessible from both sides.
  • this accessibility of the valve seat is required in the method disclosed there for hardening the valve seat, the work hardening, on the one hand to carry out the work hardening by means of suitable tools, but also to a required after the work hardening machining finishing by means of suitable tools such as milling cutters allow to ensure the dimensional accuracy of the valve seat.
  • the invention is based on the object to provide a pressure relief valve that can be produced in a cost effective manner.
  • a pressure relief valve includes a housing and a valve seat formed in the housing, which is closable via a spring-loaded closing element of the pressure relief valve.
  • the housing consists of spheroidal graphite cast iron, in particular GGG or GJS - called “nodular cast iron", wherein the housing is surface-hardened at least in a region of the valve seat.
  • Surface hardening includes hardening processes such as induction hardening, laser hardening or flame hardening.
  • An advantage of the pressure relief valve according to the invention is that pressure fluid channels and other recordings are produced during casting of the housing and not after completion of the housing must be made by machining, the surface hardening is a cost-hardening method, because because of the good dimensional accuracy of a machining finishing is usually not necessary or at least keeps within narrow limits and thus reduces a tool use.
  • the housing is advantageously produced by means of a precision or investment casting process, such as, for example, a lost wax process, in particular with a wax model enveloped in refractory molding material.
  • a precision or investment casting process such as, for example, a lost wax process
  • a wax model enveloped in refractory molding material such as, for example, a wax model enveloped in refractory molding material.
  • an increased dimensional stability can be achieved, which reduces a tool insert for a subsequent machining.
  • sand cores made of sand and phenolic resin, as well as so-called print cores, made of plastic after the rapid prototyping and / or rapid manufacturing process can be used.
  • At least one, in particular blind-hole-shaped, receptacle is advantageously provided in the housing, in which at least partially the pressure adjustment device is arranged, wherein the receptacle contains the valve seat.
  • the receptacle is approximately rotationally symmetrical.
  • rotating tools can be introduced into the receptacle, for example, for an optionally required post-processing of the valve seat before or after the surface hardening.
  • thus can introduce a thread into the receptacle over which the pressure adjustment can be mounted in the receptacle.
  • the receptacle is formed as a recess in the housing.
  • the above-mentioned surface hardening has, in addition to the above-mentioned advantages, the further advantage that because of the resulting reduced use of tools for post-processing, a significantly more compact and space-saving arrangement, in particular of the pressure adjustment device and the receptacle in the housing, can be selected.
  • the valve seat can be arranged in such a way that it is accessible exclusively from a single side, in particular via the receptacle, for surface hardening, in particular by means of a tool, and / or for post-processing by means of a tool, in particular essentially in the closing direction of the closing element ,
  • the closing element has a closing cone, from which, starting in the closing direction, a guide piston is arranged on the closing element.
  • the closing cone in particular a contact surface of the closing cone, is in the closed state of the closing element in contact with the valve seat.
  • the closing element and the guide piston are integrally formed.
  • a spring plate of the pressure adjusting device is arranged, in particular adjacent to, the closing element.
  • the closing element and the spring plate can be formed in one piece or in several pieces.
  • a transition of the receptacle between the spring plate and the valve seat is at least partially conical.
  • the transition from a region of the spring plate in a closed position of the closing element to the valve seat is formed at least partially conically tapering. Due to the inventive design of the transition, the housing is weakened less.
  • more housing material remains between the receptacle and a fastening recess provided adjacent to the receptacle in the housing, with which the pressure limiting valve can be fastened on or between two plates.
  • a plurality of mounting recesses are provided in the housing, which are preferably formed as through holes to attach the pressure relief valve in a simple manner, for example with through bolts.
  • the spring plate is formed on a portion which protrudes beyond a spring of the pressure adjustment, tapered in the closing direction.
  • the diameter of the receptacle may decrease in the closing direction, in particular gradually and / or continuously.
  • the pressure relief valve is directly controlled, which further favors a compact and space-saving design of the pressure relief valve according to the invention.
  • each of the receptacles - as described above at least partially arranged a Druckverstell Steinen.
  • the valve seat - as described above - included in each of the shots in a space-saving manner, a respective pressure in two independent pressure medium circuits can be limited to the value set at the respective pressure adjustment device.
  • the two pressure relief valves may be fluidly connected in series.
  • FIG. 1 illustrated first embodiment of a pressure relief valve 1 comprises a housing 2, in which a receptacle 4 is provided for a provided in the housing 2 pressure adjustment device 6.
  • the pressure adjustment device 6 includes a reducer 8, a spring 10 which can be preloaded therein, and a spring plate 12.
  • the spring plate 12 is formed integrally with a spring-loaded closing element 14 which, starting from the spring plate 12 in the closing direction 24, has a closing cone 16 and a guide piston 18.
  • the reducer 8 is screwed into the receptacle 4, wherein in the receptacle 4 an internal thread is provided and a corresponding external thread is provided on the reducer 8.
  • the receptacle 4 contains a valve seat 20 and a transition 22 from a region of the spring plate 12 in a closed position of the closing element 14 to the valve seat 20.
  • the housing 2 is surface hardened to a sealing function between the valve seat 20 and closing cone 16 permanently ensure and thus increase a life of the pressure relief valve.
  • the closure member 14 is biased in its closing direction 24 against the valve seat 20.
  • the transition 22 is formed in the closing direction 24 tapered.
  • the spring plate 12 is formed at its projecting beyond the spring 10 section in the closing direction 24 tapered.
  • the transition 22 is arranged in the closing direction 24 of the closing element 14 to the valve seat and further in the closing direction 24 of the guide piston 18 is arranged in the receptacle 4.
  • the closing cone 16 is in contact with a contact surface with the valve seat 20 and seals a high-pressure side against a low-pressure side.
  • a rod portion of the closing element 14 is arranged with a reduced diameter compared to the guide piston 18 and / or the contact surface of the closing cone 16.
  • the rod portion defines an annular space 26 and the guide piston 18th a piston chamber 28, wherein between the guide piston 18 and receptacle 4, an annular gap is provided.
  • the annular gap serves to equalize the pressure medium between the annular space 26 and the piston chamber 28 as soon as the closing element moves in the receptacle.
  • the size of the annular gap determines a degree of damping, with which the movement of the closing element 14 is damped in the receptacle 4, as it is in the interaction of spring 10 and closing element 14, in particular with the spring plate 12, physically considered a spring / mass system that could otherwise swing undamped.
  • FIG. 2 shown second embodiment of the pressure relief valve 1 according to the invention
  • two pressure adjustment devices 6, each with an associated receptacle 4 are arranged substantially mirror-inverted in the housing 2.
  • the receptacles 4 shown in the second embodiment correspond to those in FIG. 1 shown and described above recording 4 of the first embodiment.
  • the pressure adjusting devices 6 used in the second embodiment largely correspond to those in FIG FIG. 1 shown and described above pressure adjusting device 6 of the first embodiment, wherein two different variants of multi-piece closing elements 14 and spring plates 12 are shown. Below, these different variants will be described.
  • the spring plate 12 and the closing element 14 are formed in such a multi-piece that a spherical end portion of the closing element 14 comes with a correspondingly shaped mating surface of the spring plate 12 in abutment.
  • alignment errors between the spring 10 or the spring plate 12 and the closing element 14 can advantageously be compensated.
  • the spring plate 12 and the closing element 14 are formed in such a way that a cylindrical end portion of the closing element 14 comes into contact with a correspondingly formed counter surface of the spring plate 12.
  • the spring plate 12 is formed here approximately hat-shaped. As a result, the closing element 14 with its cylindrical end section can be guided well in the spring plate 12.
  • a pressure relief valve with a cast housing the valve seat is surface hardened.
  • an advantage of a cost-effective production of the housing with internal pressure fluid channels recordings, especially for a pressure adjustment combined with an advantage of a durable sealing function, ensures a safe procedure to be performed, which requires - because of its good dimensional stability - only a reduced post-processing , Because of this requirement, a more compact and thus space-saving arrangement of housed in the housing functional areas, in particular a pressure adjustment device and an associated receptacle, allows.
  • a valve seat can be arranged such that it is accessible exclusively from a single side for surface hardening and / or for post-processing by means of a tool, in particular essentially in the closing direction of the closing element.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Safety Valves (AREA)

Claims (9)

  1. Soupape de limitation de pression avec un boîtier (2), et avec un siège de soupape (20) formé dans celui-ci, qui peut être fermé par un élément de fermeture à ressort (14) de la soupape de limitation de pression, caractérisée en ce que le boîtier (2) est constitué de fonte à graphite sphéroïdal, dans laquelle le boîtier (2) est durci en surface au moins dans la région du siège de soupape (20).
  2. Soupape de limitation de pression selon la revendication 1, dans laquelle il est prévu dans le boîtier (2) un logement (4), dans lequel un dispositif de réglage de pression (6) est disposé au moins en partie, dans laquelle le logement (4) contient le siège de soupape (20).
  3. Soupape de limitation de pression selon la revendication 2, dans laquelle le siège de soupape (20) est accessible par un seul côté à travers le logement (4) pour le durcissement de surface et/ou pour un réusinage au moyen d'un outil.
  4. Soupape de limitation de pression selon l'une quelconque des revendications 1 à 3, dans laquelle l'élément de fermeture (14) présente un cône de fermeture (16), à partir duquel dans la direction de fermeture (24) un piston de guidage (18) est disposé sur l'élément de fermeture (14).
  5. Soupape de limitation de pression selon la revendication 4, dans laquelle une rondelle élastique (12) du dispositif de réglage de pression (6) est disposée sur l'élément de fermeture (14) à partir du cône de fermeture (16) à l'inverse de la direction de fermeture (24).
  6. Soupape de limitation de pression selon la revendication 5, dans laquelle l'élément de fermeture (14) et la rondelle élastique (12) sont réalisés en une seule pièce ou en plusieurs pièces.
  7. Soupape de limitation de pression selon une revendication 5 ou 6, dans laquelle une transition (22) du logement (4) entre la rondelle élastique (12) et le siège de soupape (20) est de forme au moins partiellement conique.
  8. Soupape de limitation de pression selon l'une quelconque des revendications précédentes, qui est commandée directement.
  9. Soupape de limitation de pression selon l'une quelconque des revendications 2 à 8, dans laquelle il est prévu dans le boîtier (2) deux logements (4) disposés de façon essentiellement symétrique l'un par rapport à l'autre.
EP15816434.3A 2014-12-16 2015-12-16 Soupape de limitation de pression Active EP3234426B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15816434T PL3234426T3 (pl) 2014-12-16 2015-12-16 Zawór ograniczający ciśnienie

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014225983.5A DE102014225983A1 (de) 2014-12-16 2014-12-16 Druckbegrenzungsventil
PCT/EP2015/080020 WO2016097000A1 (fr) 2014-12-16 2015-12-16 Soupape de limitation de pression

Publications (2)

Publication Number Publication Date
EP3234426A1 EP3234426A1 (fr) 2017-10-25
EP3234426B1 true EP3234426B1 (fr) 2019-06-26

Family

ID=55024111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15816434.3A Active EP3234426B1 (fr) 2014-12-16 2015-12-16 Soupape de limitation de pression

Country Status (6)

Country Link
US (1) US10890267B2 (fr)
EP (1) EP3234426B1 (fr)
CN (1) CN107002897B (fr)
DE (1) DE102014225983A1 (fr)
PL (1) PL3234426T3 (fr)
WO (1) WO2016097000A1 (fr)

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1578046A (en) * 1924-02-16 1926-03-23 Logan Henry Havelock Safety valve for hot-water heaters
US2071749A (en) * 1936-02-20 1937-02-23 Gen Fire Extinguisher Co Valve
US2227629A (en) * 1937-12-14 1941-01-07 Bliss E W Co Pressure control valve and the like
US2256365A (en) * 1941-04-29 1941-09-16 Foster Engineering Co Dual relief valve
JPS5524980A (en) * 1978-08-14 1980-02-22 Mitsubishi Heavy Ind Ltd Cast iron and spheroidal graphite cast iron surface hardening
DE4429804A1 (de) * 1994-08-23 1996-02-29 Johnson Service Co Verfahren zur Herstellung von in Heizungs-, Lüftungs- und Klimaanlage eingesetzten Serienventilen
DE19644356C2 (de) * 1996-10-25 1999-02-18 Baelz Gmbh Helmut Sitzventil mit eingegossenem Ventilsitz
DE19804752A1 (de) * 1998-02-06 1999-08-12 Mannesmann Rexroth Ag Sitzventil
DE102004040359B4 (de) 2004-08-20 2011-06-16 Helmut Bälz GmbH Regelarmatur
WO2006026564A2 (fr) * 2004-08-27 2006-03-09 Vetco Gray Inc. Revetement a frottement reduit pour surfaces porteuses a contact dynamique
CN2786395Y (zh) * 2005-04-07 2006-06-07 王新民 一种异型薄壁阀门
CN2839690Y (zh) 2005-07-22 2006-11-22 上海立新液压有限公司 叠加式溢流阀
EP2463391A1 (fr) * 2010-12-09 2012-06-13 Perkins Engines Company Limited Composant durci par induction et comprenant un trou non-durci
CN202612661U (zh) * 2012-01-19 2012-12-19 新昌县利永达制冷机械有限公司 球墨铸铁空调截止阀
FR3039620B1 (fr) * 2015-07-28 2017-08-25 Poclain Hydraulics Ind Dispositif de limitation de pression notamment pour un systeme d'assistance de vehicule

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
US20190093782A1 (en) 2019-03-28
CN107002897A (zh) 2017-08-01
EP3234426A1 (fr) 2017-10-25
WO2016097000A9 (fr) 2017-03-30
US10890267B2 (en) 2021-01-12
DE102014225983A1 (de) 2016-06-16
CN107002897B (zh) 2021-08-03
PL3234426T3 (pl) 2019-11-29
WO2016097000A1 (fr) 2016-06-23

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