DE678429C - Device for the automatic discharge of conveying fluid from centrifugal pumps passing through, especially boiler feed pumps - Google Patents

Device for the automatic discharge of conveying fluid from centrifugal pumps passing through, especially boiler feed pumps

Info

Publication number
DE678429C
DE678429C DEK150181D DEK0150181D DE678429C DE 678429 C DE678429 C DE 678429C DE K150181 D DEK150181 D DE K150181D DE K0150181 D DEK0150181 D DE K0150181D DE 678429 C DE678429 C DE 678429C
Authority
DE
Germany
Prior art keywords
pumps
automatic discharge
boiler feed
passing
conveying fluid
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
Application number
DEK150181D
Other languages
German (de)
Inventor
Wilhelm Dennhardt
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.)
Klein Schanzlin and Becker AG
Original Assignee
Klein Schanzlin and Becker AG
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 Klein Schanzlin and Becker AG filed Critical Klein Schanzlin and Becker AG
Priority to DEK150181D priority Critical patent/DE678429C/en
Application granted granted Critical
Publication of DE678429C publication Critical patent/DE678429C/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D11/00—Feed-water supply not provided for in other main groups

Landscapes

  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Description

Vorrichtung zum selbsttätigen Abführen von Förderflüssigkeit durchlaufender Kreiselpumpen, insbesondere Kesselspeisepumpen, nach Patent 651997 Zusatz zum Patent 651997 Der in dem Hauptpatent unter Anspruch 2 gekennzeichnete Kegel des Rückschlagventils mit kolbenartigem Ansatz entspricht nicht in allen BetrIebspünkten den gestellten Anforderungen. Wie das Schaubild nach Abb. 4. des Hauptpatents zeigt, wird bei gesenktem Kegel eine bestimmte Wassermenge durch den Nebenausl.aß abgeleitet. Hebt sich nun der Kegel bis zum Ende des kolbenartigen Ansatzes, so ist die Entlastungsleitung geschlossen oder nahezu geschlossen, die Diurchflüßwassermenge gering und, wie das Schaubild in Abb. q. zwischen 1/2 und 3/, -des Hubes zeigt, erreicht die Summe aus Nebertauslaßwvassermenge und Durchflüßwassermenge in bestimmten Fällen nicht die zur Abführung der in der Pumpe erzeugten Wärmte nötige Mindestwassermenge. Dieses Bietriebserfordernis ist besonders bei Kesseln mit Belastung und beim Anfahren von Kesseln zu berücksichtigen.Device for the automatic discharge of conveying liquid through centrifugal pumps, in particular boiler feed pumps, according to patent 651997 addition to patent 651 997 The cone of the non-return valve with piston-like approach, characterized in the main patent under claim 2, does not meet the requirements in all operating points. As the diagram in Fig. 4 of the main patent shows, when the cone is lowered, a certain amount of water is drained through the secondary outlet. If the cone now rises to the end of the piston-like approach, the relief line is closed or almost closed, the amount of water flowing through is small and, as shown in the diagram in Fig. Q. shows between 1/2 and 3 /, - of the stroke, the sum of the Nebert outlet water volume and the flow water volume does not, in certain cases, reach the minimum water volume required to dissipate the heat generated in the pump. This operating requirement must be taken into account especially for boilers with load and when boilers are started up.

Bei dem R'ückschlagventil nach der Zusatzerfindung hat der rückseitige Ansatz, kegelartige Form, so daß der Nebenauslaß mit zunehmender D!urchflußwassermenge geschlossen wird. Es wird in jeder Stellung des Kegels die in der Pumpe erzeugte Wärme durch die Förderflüssigkeit abgeführt, entweder durch den Hauptdurchlaß oder, wenn dieser noch zu wenig geöffnet ist, die fehlende Menge durch den Nebenauslaß. Auf der Zeichnung ist ein Ausführungsbeispiel dargestellt. Abb. z zeigt das Rückschlagventil a in angehobenem Zustande; und zwar in dem Augenblick, wo der Durchflußquerschnitt für kleine Wassermengen des Hauptstrome frei. ist. Der Nebenauslaß ist noch nahezu ganz offen.In the case of the non-return valve according to the additional invention, the rear Approach, conical shape, so that the secondary outlet increases with increasing flow rate of water is closed. It is generated in the pump in every position of the cone Heat dissipated by the fluid, either through the main passage or, if this is still not open enough, the missing amount through the secondary outlet. An exemplary embodiment is shown in the drawing. Fig. Z shows the check valve a in the raised state; at the moment when the flow cross-section for small amounts of water the main stream is free. is. The secondary outlet is still almost all open.

Abb. 2 zeigt das Rückschlagventil a mit voll angehobenem Kegel. Der Nebenaüslaß ist geschlossen.Fig. 2 shows the check valve a with the cone fully raised. Of the The side outlet is closed.

Abb.3 stellt die Abhängigkeit von Ventilhub und Wassermenge am Rückschlagventil einerseits und an der Entlastungsleitung (Nebenauslaß) andererseits dar. Die Grundlinie stellt den Ventilhub des Rückschlag-. ventils dar: V gibt die jeder Ventilkegelstellung zugeordnete Durchflußwassermenge an, während s die entsprechende Wassermenge der Entlastungsleitung angibt. Man erkennt die vorteilhafte Wirkung des kegelförmig ausgebildeten Ansatzes b. Einerseits wird die Steuerung der Entlastungsleitung durch den kegelförmigen Ansatz b getätigt, andererseits wird die Mindestwasserrmenge in jeder Stellung des Kegels aus. der Summe von Neben- und Durehflußwassermenge erreicht.Fig. 3 shows the relationship between the valve lift and the amount of water at the check valve on the one hand and on the relief line (secondary outlet) on the other hand. The baseline represents the valve lift of the check valve. valve: V indicates each valve cone position assigned flow water amount, while s the corresponding amount of water of the Discharge line indicating. You can see the beneficial effect of the conical trained approach b. On the one hand, the control of the discharge line is through the conical approach b made, on the other hand, the minimum amount of water in every position of the cone. the sum of tributary and thru-river water.

Claims (1)

PATENTANSPRUCH-Vorrichtung zum selbsttätigen Abführen von Förderflüssigkeit durchlaufender Kreiselpumpen nach Patent 651 997, dadurch gekennzeichnet, daß der Kegel (a) des Rückschlagventils reit einem kegelförmigen Ansatz (b) versehen ist.PATENT CLAIM device for automatic discharge of conveyed liquid continuous centrifugal pumps according to patent 651 997, characterized in that the The cone (a) of the check valve is provided with a conical shoulder (b).
DEK150181D 1938-04-01 1938-04-01 Device for the automatic discharge of conveying fluid from centrifugal pumps passing through, especially boiler feed pumps Expired DE678429C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEK150181D DE678429C (en) 1938-04-01 1938-04-01 Device for the automatic discharge of conveying fluid from centrifugal pumps passing through, especially boiler feed pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEK150181D DE678429C (en) 1938-04-01 1938-04-01 Device for the automatic discharge of conveying fluid from centrifugal pumps passing through, especially boiler feed pumps

Publications (1)

Publication Number Publication Date
DE678429C true DE678429C (en) 1939-07-15

Family

ID=7252076

Family Applications (1)

Application Number Title Priority Date Filing Date
DEK150181D Expired DE678429C (en) 1938-04-01 1938-04-01 Device for the automatic discharge of conveying fluid from centrifugal pumps passing through, especially boiler feed pumps

Country Status (1)

Country Link
DE (1) DE678429C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1108992B (en) * 1958-06-06 1961-06-15 Gerdts Gustav F Kg Procedure to ensure the flow of a minimum amount

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1108992B (en) * 1958-06-06 1961-06-15 Gerdts Gustav F Kg Procedure to ensure the flow of a minimum amount

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