EP0821166A2 - Dispositif de sécurité pour une pompe - Google Patents

Dispositif de sécurité pour une pompe Download PDF

Info

Publication number
EP0821166A2
EP0821166A2 EP97111419A EP97111419A EP0821166A2 EP 0821166 A2 EP0821166 A2 EP 0821166A2 EP 97111419 A EP97111419 A EP 97111419A EP 97111419 A EP97111419 A EP 97111419A EP 0821166 A2 EP0821166 A2 EP 0821166A2
Authority
EP
European Patent Office
Prior art keywords
line
safety device
valve
pump
relief valve
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.)
Withdrawn
Application number
EP97111419A
Other languages
German (de)
English (en)
Other versions
EP0821166A3 (fr
Inventor
Jürgen Schmidt
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.)
Duerr Dental SE
Original Assignee
Duerr Dental SE
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 Duerr Dental SE filed Critical Duerr Dental SE
Publication of EP0821166A2 publication Critical patent/EP0821166A2/fr
Publication of EP0821166A3 publication Critical patent/EP0821166A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • F04B49/24—Bypassing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/08—Cylinder or housing parameters
    • F04B2201/0802—Vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/05—Pressure after the pump outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2205/00—Fluid parameters
    • F04B2205/11—Outlet temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2207/00—External parameters
    • F04B2207/70—Warnings

Definitions

  • the invention relates to a safety device a pump according to the preamble of claim 1.
  • Such safety devices are e.g. in shape known from pressure relief valves, in which case excessive pressure by a spring in the closing direction pressurized valve on the outlet side of the pump is opened and so the gas under pressure in the atmosphere can escape.
  • the pump is also shut down an abnormal operating condition, especially when Overheating is not always desirable if sufficient Cooling down due to the no-load operation of the pump can be reached.
  • the invention is based on the object of a safety device to develop on a pump so that in the case an abnormal operating state, neither shutdown the pump still venting gas into the atmosphere necessary is.
  • a Safety device on a pump in which the pressure relief line with an inlet line to the pump can be connected by opening a relief valve.
  • the Relief valve is by a on the pump or a Accident detector arranged in the outlet line is controlled. This will short-circuit the pump, you works without compression and transports Volume of gas repeatedly from its outlet to its inlet.
  • the safety device has a Pressure relief line on which on their first End with the outlet line or directly with the compression chamber the pump is connected.
  • the pressure relief line flows into the second end Inlet line of the pump and is normally through a relief valve closed. If necessary, can this relief valve by the accident detector, however be opened, creating a connection between input and Outlet side of the pump is created.
  • the development according to claim 2 has a pressure relief line, which through a section of the inlet conduit is formed and a relief valve, which includes the inlet valve of the pump.
  • the relief valve can be independent of the working cycle of the pump, in the case of a piston pump, regardless of position and direction of movement of the piston, by an actuator depending on the output signal of the accident detector held in the open position. If the relief valve is always open when needed, one the gas volume corresponding to the stroke volume of the pump Inlet pipe moves back and forth without any compression takes place or gas is emitted into the atmosphere.
  • the development of the invention according to claim 3 has an accident detector, which has at least one Sensor, e.g. a temperature sensor, a pressure probe or a vibration sensor, which sensor recorded at least one current operating parameter and forwards the signal to a comparator which compares detected signals with predefined limit values. As soon as it exceeds or falls below a limit value is determined, the output of a Signal causes which an opening of the relief valve in the pressure relief line.
  • Sensor e.g. a temperature sensor, a pressure probe or a vibration sensor
  • the accident detector is an expansion element, preferably one Thermal switch, which in the case of e.g. a temperature or a pressure increase an opening of the relief valve causes.
  • a Thermal switch which in the case of e.g. a temperature or a pressure increase an opening of the relief valve causes.
  • a Lead displacement e.g. about suitable mechanical Means of transfer opened the relief valve becomes.
  • valve types are listed in subclaim 6, which is particularly good as a relief valve safety device according to the invention are suitable.
  • Cone and ball valves are particularly robust and also can be used at high pressure differences.
  • Butterfly and diaphragm valves allow the relief valve to simple Way to integrate into cylinder heads of pumps, and allow a cheap production of a cylinder head with integrated relief valve.
  • the development according to claim 7 includes a Relief line connected buffer vessel, which preferably by a bellows construction and / or a rubber-like Material is stretchable, as well as an additional one Check valve, which if necessary the inlet line can close to the environment. This will, in particular in connection with large stroke volumes per work cycle create a volume with short cable lengths, which is called the "intermediate storage" of the gas between Ejection and intake stroke is used, with the check valve it is ensured that no gas in the ambient atmosphere reached.
  • Subclaim 8 specifies a heat exchanger to be arranged on the pump or in the discharge line. This is particularly advantageous if a quick Cooling of the pump should take place if necessary.
  • a safety device 2 is shown in FIG. 1, which is arranged on a pump 10 and among others an accident detector 4 comprises.
  • the pump 10 has an outlet line 22 which e.g. to can lead a pressure vessel 98, and an inlet line 12 on.
  • a sensor 24 for detecting the Operating state preferably a temperature sensor coupled to the outlet line 22 near the pump 10.
  • a comparator 28 is connected to the sensor 24, the value transmitted by the sensor 24 with one of compares a value delivered to a comparator 26.
  • Form sensor 24, comparator 26 and comparator 28 the accident detector, which is referred to as a whole 4 is provided.
  • the relief valve 16 is an electromagnetic actuator 18 actuated, which is controlled by the comparator 28.
  • the inlet line 12 is with a buffer tank 68 connected. Between the branch to the buffer tank 68 and the beginning of the inlet line 12 is in the inlet line 12, a spring-loaded check valve 62 is arranged.
  • the sensor 24 shown in FIG. 1 can also be a Pressure sensor or a vibration sensor. Furthermore, the Actuator 18 also a pneumatic or a mechanical Be the control unit.
  • the safety device 2 works as follows:
  • the comparator 28 continuously compares that from the sensor 24 measured values with those given to him by the comparator 26 can be delivered. Exceeds that of sensor 24 detected temperature a stored in the comparator 26 Value, the comparator 28 specifies a control signal the actuator 18, which causes the relief valve 16 opens. This creates a connection from the outlet line 22 via the pressure relief line 20 and the connecting line 14 to the inlet line 12 created so that the inlet and outlet line of the pump 10 are short-circuited.
  • the heat exchanger 64 in the Relief line 20 cools the circulating gas, so that the pump 10 can cool as quickly as possible.
  • the Check valve 62 in the inlet line 12 prevents that circulating gas escape from the inlet line 12 can.
  • the buffer container 68 is bellows-shaped and enables a compression-free circulation of the gas.
  • FIG 2 is a second embodiment Safety device 102 on a part only shown Pump shown, with the technical functional elements of accident detector and actuator in contrast to Figure 1 are shown in detail.
  • a cylinder head 110 of a pump there is an exhaust pipe 122, one of which is present Case branches sack-shaped pressure relief line 120.
  • Case branches sack-shaped pressure relief line 120.
  • Inlet line 112 incorporated, of which a connecting line 114 branches.
  • the pressure relief line 120 and the connecting line 114 both open into one cylindrical space 130, which is also in the cylinder head 110 of the pump is incorporated, the pressure relief line 120 in the direction of the cylindrical space 130 has a conical valve seat 138.
  • a cylindrical one Introduced guide body 132 which on his the side facing the pressure relief line 120 Tappet 134 carries, on which the guide body 132 facing away At the end a conical closure part 136 is arranged is.
  • the guide body 132 is supported by a compression spring 140 biased to the left in the drawing in the closed position, which is against the back of the conical Valve seat 138 of the pressure relief line 120 supports.
  • the conical closure part 136 is against the conical valve seat 138 of the pressure relief line 120 pressed.
  • the guide body 132 with the plunger 134, the closure part 136, the conical valve seat 138 and the compression spring 140 form an overall relief valve 116.
  • a thermal expansion element 142 is present, which against the cylindrical space 130 to the outside supports pressure-tight sealing plug 156.
  • the Dehnelement 142 corresponds in function to that Accident detector 4 of the first embodiment.
  • the safety device 102 works as follows:
  • thermal expansion element 142 e.g. a thermal wax element
  • the device 102 can be adjusted that the expansion element 142 when a certain one is exceeded Temperature in system on the one hand at the plugs 156 and on the other hand comes to the guide body 132.
  • the expansion element 142 continues to expand and moves the guide body 132 against the force of Spring 140 so that the conical closure part 136th from the tapered valve seat 138 of the pressure relief line 120 removed. This will make the pressure relief line 120 over the cylindrical space 130 and the Connection line 114 connected to inlet line 112.
  • FIG 3 is a third embodiment Security device 102 shown, which in one cylinder head consisting of two segments 210, 211 one Reciprocating pump is incorporated.
  • the reciprocating pump comprises a cylinder 250 in which there is a reciprocating piston 244, which via a connecting rod 246 a drive (not shown) is driven on and moved off. Between the top of the piston 244 and the first segment 210 and the second segment 211, respectively there is a working space 248 of the cylinder head.
  • the cylinder head of this embodiment is due to assembly executed in two parts.
  • segment 211 of the cylinder head there is an outlet line 222 which via a valve tongue 252 is connected to the working space 248 can be.
  • the valve tongue 252 also has a valve seat 254.
  • the operation of reciprocating pumps in connection with valve tongues is known as provided and is therefore not explained here.
  • segment 210 of the cylinder head is also a valve tongue 236 with a valve seat 238, which connect an inlet line 212 to the work space 248 can.
  • expansion element 242 there, one end of which is fixed to the wall 258 of the inlet pipe 212 is attached and the other end in the direction of Valve tongue 236 shows.
  • the expansion element 242 begins to expand. Analogously to the exemplary embodiment in FIG. 2, this can be done Expansion element 242 so dimensioned or the expansion material be selected so that up to a certain temperature the expansion element 242 not the valve tongue 236 touched. If this temperature is exceeded, this affects Expansion element 242 the valve tongue 236 and pushes it from Valve seat 238 away. As a result, the valve tongue 236 compulsory and independent of the working cycle of the pump constantly open and thus acts as a relief valve 216. When the valve tongue 236 is open, the Inlet line 212 as a pressure relief line 220.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Safety Valves (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
EP97111419A 1996-07-21 1997-07-06 Dispositif de sécurité pour une pompe Withdrawn EP0821166A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19629176 1996-07-21
DE1996129176 DE19629176B4 (de) 1996-07-21 1996-07-21 Sicherheitseinrichtung an einer Pumpe

Publications (2)

Publication Number Publication Date
EP0821166A2 true EP0821166A2 (fr) 1998-01-28
EP0821166A3 EP0821166A3 (fr) 1999-03-17

Family

ID=7800291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97111419A Withdrawn EP0821166A3 (fr) 1996-07-21 1997-07-06 Dispositif de sécurité pour une pompe

Country Status (2)

Country Link
EP (1) EP0821166A3 (fr)
DE (1) DE19629176B4 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1180599A1 (fr) * 2000-08-16 2002-02-20 Siemens Building Technologies AG Dispositif de sécurité pour une pompe pouvant être utilisée dans une transmission à fluide
DE19829525C2 (de) * 1998-07-02 2003-04-30 Plu Gmbh Temperaturreduzierung bei Verdrängerpumpen mit großem Rezirkulationsfluß

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011011202B4 (de) * 2011-02-14 2013-03-14 Tecmara Gmbh Schutzvorrichtung zum Schutz einer Pumpe, insbesondere zum Schutz der in einem Strömungskreislauf, insbesondere innerhalb einer Anlage vorgesehenen Pumpe vor einer Überhitzung und/oder vor einem Leerlaufen bzw. zum Schutz der in der Anlage vorgesehenen verfahrenstechnischen Prozesseinrichtungen
EP2834118B1 (fr) * 2012-04-03 2016-11-02 Continental Teves AG & Co. oHG Groupe de pompage entraîné par un moteur électrique
CN116201740B (zh) * 2023-04-21 2025-06-10 中国船舶集团有限公司第七一九研究所 一种离心泵故障检测仪

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3028396A1 (de) * 1980-07-26 1982-02-11 Wepuko-Hydraulik GmbH & Co Pumpen- und Kompressorenfabrik, 7418 Metzingen Hochdruck-kolbenpumpe
DE3341795C2 (de) * 1983-11-19 1986-07-10 Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart Regelventil für eine Regeleinrichtung eines hydraulischen Lüfterantriebs, insbesondere für Kühlanlagen von Schienenfahrzeugen
DE4009641A1 (de) * 1990-03-26 1991-10-02 Daimler Benz Ag Vorrichtung zur hydraulikstromsteuerung bzw. -regelung
US5435379A (en) * 1992-08-14 1995-07-25 Texas Instruments Incorporated Method and apparatus for low-temperature semiconductor processing
US5563351A (en) * 1994-03-31 1996-10-08 Caterpillar Inc. Method and apparatus for determining pump wear
JPH07334247A (ja) * 1994-06-14 1995-12-22 Sumitomo Constr Mach Co Ltd 油圧作動油の温度制御装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19829525C2 (de) * 1998-07-02 2003-04-30 Plu Gmbh Temperaturreduzierung bei Verdrängerpumpen mit großem Rezirkulationsfluß
EP1180599A1 (fr) * 2000-08-16 2002-02-20 Siemens Building Technologies AG Dispositif de sécurité pour une pompe pouvant être utilisée dans une transmission à fluide
US6595233B2 (en) 2000-08-16 2003-07-22 Siemens Building Technologies Ag Safety device for a fluid transmission

Also Published As

Publication number Publication date
DE19629176A1 (de) 1998-01-22
DE19629176B4 (de) 2006-07-06
EP0821166A3 (fr) 1999-03-17

Similar Documents

Publication Publication Date Title
EP0471142A2 (fr) Soupape de réglage de la pression pour l'installation dans un conduit de purge d'un moteur à combustion interne
WO1998046916A2 (fr) Soupape lineaire
EP0487944B1 (fr) Soupape de sécurité
DE602004010490T2 (de) Gaszufuhrsystem für eine Brennkraftmaschine mit einem durch einen Steuerdruck geregeltem Druckminderventil
DE102008050252B4 (de) Ventilvorrichtung für Brennkraftmaschinen, insbesondere Sekundärluftventil
EP0519507B1 (fr) Dispositif de vanne, en particulier pour retourner des vapeurs d'essence
EP0821166A2 (fr) Dispositif de sécurité pour une pompe
DE102020003127B3 (de) lnjektor für eine Verbrennungskraftmaschine, insbesondere eines Kraftfahrzeugs, sowie Verbrennungskraftmaschine für ein Kraftfahrzeug
DE60127448T2 (de) Servogesteuertes sicherheitsventil für behälter für toxische fluide
DE2114044C2 (de) Steuereinrichtung zum Steuern eines Fluidmotors
DE3416465C2 (de) Elektromagnetisch betätigbares Ventil, insbesondere für den Heizungskreislauf eines Kraftfahrzeuges
DE2929649C2 (de) Entlüftungsventil für Schnellbremsbeschleuniger von Schienenfahrzeug-Druckluftbremsen
DE2007256A1 (de) Heißluft anlage.'
EP0246617B1 (fr) Appareil pour impulsions d'air évitant la formation de voûtes dans les silos pour matières en vrac
DE2534279A1 (de) Ventil
DE60015034T2 (de) Vorrichtung zum Setzen von zweiteiligen Befestigungselementen
DE3508685C2 (fr)
WO1991001445A1 (fr) Systeme de commande pour l'arret d'un moteur a combustion interne
DE4244292C2 (de) 3/2-Wegeventil
EP0277309A1 (fr) Soupape à tiroir à fermeture rapide
DE102004057466A1 (de) Druckregler für ein gasbetriebenes Kraftfahrzeug
EP0081711A1 (fr) Dispositif de commande pour un compresseur
EP1003962B1 (fr) Dispositif permettant de reguler la temperature de l'air d'aspiration de moteurs a combustion interne a compression de melange
EP1209394A2 (fr) Vérin électro-hydraulique
EP0462392B1 (fr) Vanne hydraulique

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

RHK1 Main classification (correction)

Ipc: F04B 49/24

17P Request for examination filed

Effective date: 19990611

AKX Designation fees paid

Free format text: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL

17Q First examination report despatched

Effective date: 20030521

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20031001