DE1989205U - LIQUID FLOW METER. - Google Patents
LIQUID FLOW METER.Info
- Publication number
- DE1989205U DE1989205U DEC12857U DEC0012857U DE1989205U DE 1989205 U DE1989205 U DE 1989205U DE C12857 U DEC12857 U DE C12857U DE C0012857 U DEC0012857 U DE C0012857U DE 1989205 U DE1989205 U DE 1989205U
- Authority
- DE
- Germany
- Prior art keywords
- liquid
- nozzle
- pressure
- flow
- chamber
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D3/00—Control of nuclear power plant
- G21D3/04—Safety arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/38—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction the pressure or differential pressure being measured by means of a movable element, e.g. diaphragm, piston, Bourdon tube or flexible capsule
- G01F1/383—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction the pressure or differential pressure being measured by means of a movable element, e.g. diaphragm, piston, Bourdon tube or flexible capsule with electrical or electro-mechanical indication
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
- G01P13/0006—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances
- G01P13/0066—Indicating or recording presence, absence, or direction, of movement of fluids or of granulous or powder-like substances by using differences of pressure in the fluid
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Measuring Volume Flow (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zur Messung der Durchflußmenge einer Flüssigkeit, insbesondere zur automatischen Betätigung der Auslösung von Sicherheitsmaßnahmen, wenn die Durchflußmenge eines Mediums in einer Leitung unter einen vorgegebenen Wert sinkt.The invention relates to a device for measuring the flow rate of a liquid, in particular for the automatic actuation of the triggering of safety measures when the flow rate of a medium in a line falls below a predetermined value.
Derartige Vorrichtungen sind vor allem immer dann nützlich, wenn man eine Apparatur bei Unterbrechung oder auch nur Verringerung des Mediumkreislaufs stillegen will. Diese Notwendigkeit tritt beispielsweise bei Diffusionspumpen auf, wobei der Pumpenkörper dauernd gekühlt werden muß. Wenn der Kühlwasserkreislauf aus irgendeinem Grund unterbrochen ist, muß die Pumpe sofort stillgelegt und die sie einschließenden Ventile müssen geschlossen werden. Im allgemeinen werden diese Maßnahmen automatisch mittels eines elektrischen Kreises ausgelöst.Such devices are particularly useful when you want to shut down an apparatus when the medium cycle is interrupted or only reduced. This need arises, for example, with diffusion pumps, the pump body having to be continuously cooled. If the cooling water circuit is interrupted for any reason, the pump must be shut down immediately and the valves enclosing it must be closed. In general, these measures are triggered automatically by means of an electrical circuit.
Eine bisher verwendete, verhältnismäßig einfache Vorrichtung zur Feststellung einer Verringerung oder Unterbrechung des Kreislaufs eines Mediums umfaßt ein Membranmanometer, das den statischen Druck des Mediums mißt. Man kann auch ein Venturi-Rohr benutzen, das aufgrund der beiderseits einer in der Leitung angeordneten Verengung beobachteten Drucke eine Anzeige der Wasserdurchflußmenge liefert. Diese Vorrichtungen gewährleisten jedoch nicht die erwünschte Sicherheit. Tatsächlich würde eine Verstopfung der Leitung stromabwärts vom Manometer dessen Anzeigen nicht verändern. Ebenso bliebe bei einer Stoffansammlung in der Verengung des Venturi-Rohrs die Durchflußanzeige selbst bei Unterbrechung des Kreislaufs des Mediums erhalten.A previously used, relatively simple device for determining a reduction or interruption of the circulation of a medium comprises a diaphragm manometer which measures the static pressure of the medium. It is also possible to use a venturi tube which gives an indication of the water flow rate on the basis of the pressures observed on both sides of a constriction arranged in the conduit. However, these devices do not ensure the desired security. In fact, a blockage in the line downstream of the pressure gauge would not change its readings. Likewise, if there was an accumulation of material in the narrowing of the Venturi tube, the flow rate indicator would be retained even if the medium circulation was interrupted.
Zur Verhinderung dieser Nachteile wurde die Verwendung eines Schraubenschwimmers vorgeschlagen, der sich in einem Glasrohr befindet und von dem Medium in Drehung versetzt wird, wobei die Stellung dieses Schwimmers durch einen mit einer Fotozelle zusammenwirkenden Lichtstrahl angezeigt wird. Es handelt sich dabei jedoch um eine sehr komplizierte Vorrichtung, die zahlreichen möglichen Betriebsstörungen ausgesetzt ist.To avoid these disadvantages, the use of a screw float located in a glass tube and set in rotation by the medium has been proposed, the position of this float being indicated by a light beam interacting with a photocell. However, it is a very complex device and is subject to numerous possible malfunctions.
Im Gegensatz zu diesen Geräten wird erfindungsgemäß eine sehr einfache Vorrichtung vorgeschlagen, die eine wesentlich verbesserte Betriebssicherheit aufweist.In contrast to these devices, a very simple device is proposed according to the invention, which has a significantly improved operational reliability.
Die Erfindung betrifft eine Vorrichtung zur Messung der Durchflußmenge einer Flüssigkeit in einer Leitung und weist in derThe invention relates to a device for measuring the flow rate of a liquid in a line and has in the
Strömungsrichtung der Flüssigkeit einen ersten, in eine Düse auslaufenden Leitungsabschnitt und einen zweiten, mit dem ersten dicht verbundenen Leitungsabschnitt auf, der mit der Düse eine Kammer begrenzt, in der durch die Strömung der Flüssigkeit in der Düse ein Unterdruck erzeugt wird, wobei eine Manometerkapsel die Druckveränderungen in der Kammer bezüglich des Umgebungsdrucks mißt.Direction of flow of the liquid has a first line section running out into a nozzle and a second line section which is tightly connected to the first and which delimits a chamber with the nozzle in which a negative pressure is generated by the flow of the liquid in the nozzle, a manometer capsule the Measures pressure changes in the chamber with respect to the ambient pressure.
Offensichtlich kann das Manometer nur dann einen Unterdruck anzeigen, wenn im Ejektor tatsächlich das Medium strömt.Obviously, the pressure gauge can only show a negative pressure if the medium is actually flowing in the ejector.
Zur weiteren Erläuterung der wesentlichen Eigenschaften und Vorteile der erfindungsgemäßen Vorrichtung wird im folgenden mit Bezug auf die einzige beigefügte Figur eine als Beispiel gewählte besondere Ausführungsform beschrieben, ohne die Erfindung damit zu begrenzen.To further explain the essential properties and advantages of the device according to the invention, a particular embodiment selected as an example is described below with reference to the single attached figure, without thereby limiting the invention.
Der in der Figur gezeigte erfindungsgemäße Durchflußmesser besteht im wesentlichen aus einem Ejektor 1, der durch die Kupplungen 2 und 3 mit der Leitung verbunden ist, in der das Medium strömt. Der Ejektor 1 kann sehr einfach gebaut sein, da sein Ansaugvolumen sehr begrenzt ist. Im besonderen beschriebenen Fall besteht er aus einer Wasserstrahlpumpe mit einer Düse 4 und einem Diffusor 5.The flow meter according to the invention shown in the figure consists essentially of an ejector 1 which is connected by the couplings 2 and 3 to the line in which the medium flows. The ejector 1 can be built very simply because its suction volume is very limited. In the particular case described, it consists of a water jet pump with a nozzle 4 and a diffuser 5.
Eine Manometerkapsel 6 ist seitlich an der Wasserstrahlpumpe 1 abgezweigt. Die Membran 8 dieser Manometerkapsel ist über einenA manometer capsule 6 branches off to the side of the water jet pump 1. The membrane 8 of this manometer capsule is over a
Hebel 7 mit einem Mikroschalter 9 verbunden. Das gewährleistet das Schließen des die Sicherheitsmaßnahmen auslösenden elektrischen Kreises.Lever 7 connected to a microswitch 9. This ensures that the electrical circuit that triggers the safety measures is closed.
Wenn das Gerät in Betrieb ist, erzeugt die Flüssigkeitsströmung in der Wasserstrahlpumpe 1 ein Teilvakuum in der Manometerkapsel 6. Bei der entsprechenden Stellung des mit der Membran verbundenen Hebels 7 ist der Mikroschalter 9 geöffnet. Wenn der Durchfluß des Mediums in der Wasserstrahlpumpe 1 aus irgendeinem Grund herabgesetzt wird, steigt der Druck in der Manometerkapsel 6 und die Membran 8 verformt sich in Richtung der Schließung des Mikroschalters 9. Diese Schließung, die die Auslösung von Sicherheitsmaßnahmen bewirkt, tritt ein, wenn der Druck in der Manometerkapsel 6 einen bestimmten Grenzwert erreicht, der der zulässigen Mindestdurchflußmenge des Mediums entspricht.When the device is in operation, the liquid flow in the water jet pump 1 creates a partial vacuum in the manometer capsule 6. When the lever 7 connected to the membrane is in the appropriate position, the microswitch 9 is open. If the flow of the medium in the water jet pump 1 is reduced for any reason, the pressure in the manometer capsule 6 rises and the membrane 8 deforms in the direction of the closure of the microswitch 9. This closure, which causes the triggering of safety measures, occurs when the pressure in the manometer capsule 6 reaches a certain limit value which corresponds to the minimum permissible flow rate of the medium.
Dieser Druck kann nach Belieben durch Einwirkung auf die Laufstrecke des Hebels 7 eingestellt werden.This pressure can be adjusted as desired by acting on the travel distance of the lever 7.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR968987 | 1964-03-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1989205U true DE1989205U (en) | 1968-07-11 |
Family
ID=8826563
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEC12857U Expired DE1989205U (en) | 1964-03-27 | 1965-03-17 | LIQUID FLOW METER. |
Country Status (5)
Country | Link |
---|---|
CH (1) | CH432029A (en) |
DE (1) | DE1989205U (en) |
ES (1) | ES311039A1 (en) |
GB (1) | GB1086804A (en) |
LU (1) | LU48270A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2474408B1 (en) * | 1980-01-28 | 1987-09-18 | Sibe | INSTANT CONSUMPTION INDICATOR FOR VEHICLE DRIVEN BY AN INTERNAL COMBUSTION ENGINE |
JPS61118692A (en) * | 1984-11-13 | 1986-06-05 | ウエスチングハウス エレクトリック コ−ポレ−ション | Method of operating generation system of pressurized water type reactor |
CA2061401C (en) * | 1991-02-20 | 1999-05-04 | Yutaka Takahashi | Water purifying apparatus |
-
1965
- 1965-03-04 CH CH298365A patent/CH432029A/en unknown
- 1965-03-17 DE DEC12857U patent/DE1989205U/en not_active Expired
- 1965-03-18 GB GB11526/65A patent/GB1086804A/en not_active Expired
- 1965-03-26 ES ES0311039A patent/ES311039A1/en not_active Expired
- 1965-03-26 LU LU48270A patent/LU48270A1/xx unknown
Also Published As
Publication number | Publication date |
---|---|
GB1086804A (en) | 1967-10-11 |
LU48270A1 (en) | 1965-05-26 |
ES311039A1 (en) | 1965-06-01 |
CH432029A (en) | 1967-03-15 |
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