WO2006010745A1 - Soupape d'arret comportant une sonde de mesure de pression - Google Patents

Soupape d'arret comportant une sonde de mesure de pression Download PDF

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Publication number
WO2006010745A1
WO2006010745A1 PCT/EP2005/053590 EP2005053590W WO2006010745A1 WO 2006010745 A1 WO2006010745 A1 WO 2006010745A1 EP 2005053590 W EP2005053590 W EP 2005053590W WO 2006010745 A1 WO2006010745 A1 WO 2006010745A1
Authority
WO
WIPO (PCT)
Prior art keywords
valve
shut
pressure measuring
hole
valve seat
Prior art date
Application number
PCT/EP2005/053590
Other languages
German (de)
English (en)
Inventor
Michael Neumann
Udo Wenning
Ulrich Wolf
Original Assignee
BSH Bosch und Siemens Hausgeräte 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 BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Publication of WO2006010745A1 publication Critical patent/WO2006010745A1/fr

Links

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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0066—Hydraulic or pneumatic means

Definitions

  • the present invention relates to a shut-off valve for permanently sealing an eva ⁇ ku convinced chamber, in particular a vacuum panel for a refrigerator, and a pressure gauge for detecting the pressure in such a vacuum container.
  • Pressure measuring heads for negative pressures in the micro- to millibar range are usually mounted on standardized so-called small flanges, so that for mounting the pressure measuring head to the vacuum container, the latter must have a small flange complementary to the pressure measuring head.
  • Another connection point on the vacuum container is required in order to connect thereto a shut-off valve, via which the container can be evacuated and subsequently closed. Both connection points each include the risk of leakage.
  • shut-off valves suitable for mass applications generally have seals of organic material.
  • the achievable with these seals Leckra ⁇ th are over 1x10 8 mbar l / s, so that long life on the order of several months of a sealed evacuated container are not possible.
  • shut-off valves with metallic seals are known, which make it possible to achieve lower leakage rates, these valves are generally expensive to manufacture and correspondingly expensive, so that they are not suitable for mass applications.
  • An object of the present invention is to provide a shut-off valve for hermetically sealing off a vacuum container, which both enables the monitoring of the pressure in the vacuum container and minimizes the risk of connection leaks.
  • a pressure measuring probe with the for connection to the vacuum vessel provided connection side is received communicating in the valve body.
  • the pressure measuring probe comprises a filament.
  • the ohmic resistance of the filament is dependent on its temperature, and the temperature in turn depends on the thermal power, which emits the filament to the surrounding Rest ⁇ gas of the vacuum vessel. It is therefore possible to deduce the pressure in its surroundings from the electrical heating power required to maintain a given resistance value of the filament or the resistive value of the filament which adjusts for a given electrical heating power.
  • the pressure measuring probe further preferably comprises a screwed into a threaded bore of the valve body screw base. This makes it possible to replace the pressure measuring probe in the event of a defect.
  • a current feedthrough which is tightly inserted into a transverse to the threaded bore threaded bore and touches ei ⁇ NEN electrical contact of the screw.
  • a second electrical contact of the screw base may be formed by the thread of the screw base itself, which is in conductive contact with the metallic valve body.
  • a further object of the invention is to provide a metallically sealed shut-off valve which can be realized in a simple and inexpensive manner and is suitable for mass applications.
  • This object is achieved by a shut-off valve with the features of claim 5.
  • the leadership of the wearer of the closing body in an internal thread of fürgangsboh ⁇ tion leads to a considerable simplification of the construction of the valve compared to a conventional angle valve, in which a threaded bore for guiding the carrier branches off from the angled through-bore of the valve body and against the für ⁇ gangsbohrung eg must be sealed by a bellows in order to achieve a good Dichtig ⁇ speed of the valve.
  • the closing body on the carrier is preferably kept decoupled from a rotation of the carrier, so that it no longer rotates when the valve closes, at the latest when it comes into frictional contact with a valve seat.
  • the closing body and / or valve seat to be closed by the closing pressure be plastically deformed, so that one of both conforms to irregularities of the an ⁇ and a seal minimum leakage rate is achieved.
  • the closing body is formed of a softer metal than the valve seat, so that it is the closing body which eventually adapts to irregularities of the valve seat.
  • the closing body can - optionally together with the carrier - be exchanged easily and inexpensively, if it is worn and an adequate seal is no longer gerizr ⁇ guaranteed.
  • the closing body comprises a valve plate facing the first plate, the edge of which is spaced by a circumferential groove from the carrier.
  • This groove makes it possible, when the first plate is pressed against the valve seat, to deform the plate as a whole by narrowing the groove, thus achieving an excellent seal between the plate and the valve seat.
  • the closing body further comprises a second plate facing the carrier, which is connected to the first via a curved dome.
  • the caused by the curvature of the calotte small transition surface between the calotte and one of the plates be ⁇ acts that the plates are pivotable with little effort by a small angle with respect to each other, so that the orientation of the first plate to that of the valve seat can adapt, if the plane of the valve seat is not exactly perpendicular to the direction of displacement of the wearer.
  • the invention further relates to a pressure measuring head, which may be part of a shut-off valve as described above, but may also form an independent functional unit, with a base body having a connection side for connection to a Va ⁇ kuum grasper and an outgoing from the connection side threaded hole, and with a pressure probe, which has a screwed into the threaded hole screw base.
  • the screw base makes it possible, in the event of a defect in the pressure measuring probe, to exchange these conveniently and to reuse the basic body.
  • FIG. 1 shows a schematic section through a first embodiment of the inventive shut-off valve, disassembled into its components.
  • Fig. 2 is an enlarged detail of Fig. 1;
  • FIG. 3 shows a schematic section through a slightly modified design of the shut-off valve with the closing body screwed in
  • Fig. 5 is a plan view of the atmosphere-side connection flange of a Ab ⁇ shut-off valve according to a third embodiment.
  • the check valve shown in Fig. 1 has substantially the shape of a cylindrical body made of metal, preferably stainless steel, with two formed on the opposite ends of the valve body 1 small flanges 2, 3.
  • a through hole 4 extends axially between the small flanges 2, 3 and consists of two sections of different diameter, a narrow section 5 facing the vacuum-side small flange 3, a wide section 6 facing the atmosphere-side small flange 2 and a shoulder formed as a valve seat 7 between the two sections 5, 6.
  • the wide section 6 is provided at least on a part of its length with an internal thread 8.
  • a carrier 9, to which a sealing body 10 is fixed, is provided to be screwed into the wide portion 6 as soon as a vacuum container connected to the flange 3 has reached a designated final pressure.
  • the carrier 9 here has the form of a grub screw, at the tip of the sealing body 10 is rotatably mounted about the longitudinal axis A of the valve body 1.
  • the sealing body 10 comprises a plate 11 which largely covers the tip of the carrier 9 facing the valve seat and carries a hemispherical dome 12.
  • a plate 13 is fixed, which consists of a softer metal than that of the valve body 1 and the carrier 9, for example made of aluminum, copper, in particular OFHC copper, or indium.
  • the plate could also consist of a thin, deformable substrate made of steel, on which at least in those surface areas, which are intended to come into contact with the valve seat 7, with a layer of softer metal such as OFHC copper or indium, is provided.
  • a threaded bore 15 is introduced, which opens onto the free cross section of the flange 3.
  • the threaded bore 15 is crossed by a tap hole 16 coming from the side of the valve body 1.
  • a single-pole current feedthrough 17 is mounted tightly.
  • an insulator body 19 made of glass or ceramic surrounding the conductor 18 of the current leadthrough is fastened to the valve body 1 with the aid of a vacuum-compatible, eg ceramic, adhesive 20.
  • a pressure measuring probe 21 shown enlarged in FIG. 2 is provided for screwing into the threaded bore 15.
  • the construction of the pressure measuring probe 21 is similar to that of a bulb without glass body; it comprises a metallic screw base 22, a metal contact point 24 fixed on the longitudinal axis of the screw base 22 by an insulator body 23, and a filament 25, via which the screw base 22 and the contact point 24 are conductively connected.
  • the filament 25 is shown recessed in the figure to protect against damage in the screw 22, but could also survive on this.
  • a control electronics which supplies the filament 25 with electrical heating power and detects the resistance of the filament 25 is not shown in the figure.
  • FIG. 3 shows a second embodiment of the valve according to the invention with the support 9 screwed in and the sealing body 10 resting on the valve seat 7.
  • This configuration differs from that of FIG. 1 on the one hand by a wrench size 26 formed on the valve body 1, here in the form of two cutouts, which allow to apply an open-end wrench to the valve body 1 and to compensate with its help a torque applied when the carrier 9 is pulled.
  • connection bore 27 which extends in extension of the tap hole 16 to the through hole 4.
  • the purpose of the connection bore 27 is to allow rapid venting of the taphole 16 during the evacuation of the vacuum container (not shown), so that the measurement results of the pressure probe 21 are not distorted by residual air coming from the taphole 16 at the in-hole the threaded hole 15 screwed probe 21 escapes over.
  • a curved tube 28 is fixed to the atmosphere side Klein ⁇ flange 2 of the valve body 1 in a conventional manner by means of a bracket 29.
  • the mutually facing flanges of valve body 1 and tube 28 are connected by a clamped and held by a metallic support ring 30 polymer O Ring 31 sealed.
  • An Allen wrench 32 with a cylindrical shaft is sealed in a bore 33 of the tube 28 aligned with the through hole 4 by elastomer O-rings 34 rotatably and slidably held. It is shown in a starting position, in which the carrier 9, as shown in dashed lines in the figure, can be plugged onto the tip of the key 32.
  • tube 28 and through-hole 4 are open, and the connected vacuum container can be evacuated.
  • the pressure probe 21 indicates that the desired final pressure is reached
  • the key 32 is advanced until the carrier 9 reaches the female thread 8, and then the key 32 is started to rotate to engage the carrier 9 with the female thread 8 bring and finally shut off the valve. Air leaking between the key 32 and the O-rings 34 during closing of the valve hardly affects the final pressure of the vacuum vessel, since it is continuously pumped out via the pipe 28 and the conductance of the valve already at the time when the carrier 9 the O-ring 31 passes through, is very small.
  • a plurality of channels 35 extends in the axial direction along the wall of the wide section 6 of the through-hole. These channels enable evacuation of a vacuum container connected to the valve even when the carrier 9 of the valve is already in engagement with the internal thread 8, since the air from the vacuum container can flow past the carrier 9 through the channels 35. Only when the carrier 9 is screwed so deeply into the thread 8 that it covers the channels 35 over its entire length, the conductance of Ven ⁇ tils decreases so far that evacuation is no longer possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)
  • Indication Of The Valve Opening Or Closing Status (AREA)

Abstract

L'invention concerne une soupape d'arrêt comportant un corps de soupape (1), un orifice traversant (4) qui s'étend entre deux côtés de raccordement (2, 3) du corps de soupape (1), et un corps de fermeture (10) qui peut être pressé contre un siège de soupape (7) pour obturer l'orifice traversant (4). Une sonde de mesure de pression (21) est vissée dans un orifice fileté (15) du corps de soupape (1), de manière à communiquer avec un desdits côtés de raccordement (3).
PCT/EP2005/053590 2004-07-23 2005-07-22 Soupape d'arret comportant une sonde de mesure de pression WO2006010745A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004035728.5 2004-07-23
DE102004035728.5A DE102004035728B4 (de) 2004-07-23 2004-07-23 Absperrventil und Druckmesskopf

Publications (1)

Publication Number Publication Date
WO2006010745A1 true WO2006010745A1 (fr) 2006-02-02

Family

ID=35094515

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/053590 WO2006010745A1 (fr) 2004-07-23 2005-07-22 Soupape d'arret comportant une sonde de mesure de pression

Country Status (2)

Country Link
DE (1) DE102004035728B4 (fr)
WO (1) WO2006010745A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001170A1 (de) * 1990-01-17 1991-07-18 Roland Man Druckmasch Einschraubventilkoerper-bausatz, insbesondere fuer ein drosselventil
JPH09330132A (ja) * 1996-06-12 1997-12-22 Omron Corp バルブ付半導体圧力センサモジュール及びそれを用いた圧力制御装置並びにその圧力制御装置を用いた標準圧力発生装置並びに血圧計
DE19913230A1 (de) * 1999-03-23 2000-10-12 Vti Ventil Technik Gmbh Ventilarmatur für einen Druckbehälter
WO2003106954A2 (fr) * 2002-06-13 2003-12-24 The Boc Group Plc Manometre a vide
DE10361842A1 (de) * 2003-01-04 2004-07-22 Daume Regelarmaturen Gmbh Ventil mit Einrichtung zur Erkennung des Verschleißgrades

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4205703A (en) * 1979-01-24 1980-06-03 Pall Corporation Flow sensor responsive to fluid within a range from above a predetermined minimum to below a predetermined maximum and nonresponsive to fluid flows beyond said range
GB2227074A (en) * 1989-01-16 1990-07-18 Graco Inc Dispensing head assembly
JP3438843B2 (ja) * 1995-06-14 2003-08-18 株式会社デンソー 熱式流量計
DE19913968B4 (de) * 1999-03-18 2004-02-12 Fafnir Gmbh Thermischer Durchflußsensor und Verfahren zum Bestimmen des Durchflusses eines Fluids
DE29924037U1 (de) * 1999-07-22 2002-02-28 Jungkeit Horst Modularer Massedurchflussmesser in Blockbauweise
US6679291B1 (en) * 2002-10-31 2004-01-20 Exxon.Valve And Coupling Company Poppet valve assembly

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4001170A1 (de) * 1990-01-17 1991-07-18 Roland Man Druckmasch Einschraubventilkoerper-bausatz, insbesondere fuer ein drosselventil
JPH09330132A (ja) * 1996-06-12 1997-12-22 Omron Corp バルブ付半導体圧力センサモジュール及びそれを用いた圧力制御装置並びにその圧力制御装置を用いた標準圧力発生装置並びに血圧計
DE19913230A1 (de) * 1999-03-23 2000-10-12 Vti Ventil Technik Gmbh Ventilarmatur für einen Druckbehälter
WO2003106954A2 (fr) * 2002-06-13 2003-12-24 The Boc Group Plc Manometre a vide
DE10361842A1 (de) * 2003-01-04 2004-07-22 Daume Regelarmaturen Gmbh Ventil mit Einrichtung zur Erkennung des Verschleißgrades

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 04 31 March 1998 (1998-03-31) *

Also Published As

Publication number Publication date
DE102004035728B4 (de) 2020-10-01
DE102004035728A1 (de) 2006-03-16

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