DK155769B - PLANT WITH CLOSED LIQUID CIRCUIT SECTION CONTAINING A VENTURIROER - Google Patents
PLANT WITH CLOSED LIQUID CIRCUIT SECTION CONTAINING A VENTURIROER Download PDFInfo
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- DK155769B DK155769B DK492779AA DK492779A DK155769B DK 155769 B DK155769 B DK 155769B DK 492779A A DK492779A A DK 492779AA DK 492779 A DK492779 A DK 492779A DK 155769 B DK155769 B DK 155769B
- Authority
- DK
- Denmark
- Prior art keywords
- pump
- venturi
- liquid
- venturi tube
- circuit section
- Prior art date
Links
- 239000007788 liquid Substances 0.000 title claims description 35
- 239000012530 fluid Substances 0.000 claims description 27
- 238000010586 diagram Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 5
- 238000007789 sealing Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 230000007423 decrease Effects 0.000 description 4
- 230000002706 hydrostatic effect Effects 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000003674 animal food additive Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/10—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks ; Hydraulic components of a central heating system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
- Pipe Accessories (AREA)
- Reciprocating Pumps (AREA)
- Pipeline Systems (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Description
DK 155769 BDK 155769 B
iin
Opfindelsen angår et anlæg omfattende en sluttet væskekredsløbssektion, der har en pumpe, som er forsynet med en indløbs-og en udløbsåbning, og som holder væsken i cirkulation i kreds-5 løbssektionen, en ekspansionsbeholder, hvori væsken kan opsam les under atmosfærisk tryk samt et mellem væskekredsløbssektionen og ekspansionsbeholderen indskudt venturirør.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a system comprising a closed liquid circulation section having a pump provided with an inlet and outlet orifice and which keeps the liquid circulating in the circulation section, an expansion vessel in which the liquid can be collected under atmospheric pressure, and a venturi tube inserted between the fluid circuit section and the expansion vessel.
I alle væskekredsløbssektioner må der findes organer til at 2q kompensere for udvidelsen og sammentrækningen af væsken i kredsløbet. Som sådanne organer anvendes der traditionelt tryksatte ekspansionsbeholdere, der tilsluttes kredsløbssektionen på en sådan måde, at når væsken udvides, ledes en del af den ud i ekspansionsbeholderen, hvorved man undgår util-25 ladelige trykstigninger i kredsløbssektionen. Ekspansions- beholderen forsyner også kredsløbssektionen med væske, når væsken i sektionen afkøles, og forhindrer derved luft i at trænge ind i kredsløbet, hvorved der opretholdes en mere ensartet varmeoverføring. Til sådanne kredsløbssektioner, hvor 2ø væsken var under tryk, krævedes tidligere også ekspansions beholdere, hvor væsken var under tryk. Kravet om trykbeholdere har forøget prisen og har gjort sådanne væskekredsløbssektioner mere komplicerede og har forøget kravene til vedligeholdelse på grund af nødvendigheden af at inspicere tryk-25 beholderen og dens tilhørende dele.In all fluid circulation sections, means must be provided to compensate for 2q the expansion and contraction of the fluid in the circuit. As such, traditionally pressurized expansion vessels are used which are connected to the circuit section in such a way that as the fluid expands, a portion of it is discharged into the expansion vessel, thereby avoiding intolerable pressure increases in the circuit section. The expansion vessel also supplies liquid to the circuit section as the liquid in the section cools, thereby preventing air from entering the circuit, thereby maintaining a more uniform heat transfer. For such circuit sections where the 2o fluid was pressurized, expansion vessels were previously required where the fluid was pressurized. The requirement for pressure vessels has increased the price and has made such fluid circuit sections more complicated and has increased the maintenance requirements due to the need to inspect the pressure vessel and its associated parts.
Brugen af en venturi-indretning i et vandkredsløb er kendt og er specielt vist i Berman's US-patent nr. 2.265.108. I dette patent benyttes venturi-indretningen imidlertid som 3q en forbindelse mellem en ekspansionsbeholder, en varmegiver og en forsyning af tilgangsvand på en sådan måde, at tilgangsvandets passage gennem venturi-røret skaber et område med undertryk yed venturirørets hals, hvilket benyttes til at fremkalde en vandstrømning fra ekspansionsbeholderen til kreds-35 løbet. Berman benytter således venturi-indretningen som en strålepumpe for at støtte vandcirkulationen inden for kredsløbet.The use of a venturi device in a water circuit is known and is particularly shown in Berman's U.S. Patent No. 2,265,108. In this patent, however, the venturi device is used as a connection between an expansion vessel, a heat sensor and a supply of inlet water in such a way that the passage of the inlet water through the venturi creates an area of suppressed venturi throat, which is used to induce a water flow from the expansion vessel to the circuit. Thus, Berman uses the venturi device as a jet pump to support water circulation within the circuit.
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22
Brugen af ejektor eller strålepumpe til at cirkulere vand i et kredsløb med eller til at støtte en sådan cirkulation med er velkendt og er vist i følgende US patenter: nr. 566.904 g (Gold), 1.418.583 (Lincke), 2.404.114 (Waterman), 2.843.142 (Gardner), 3.274.065 (Kierulf og andre) og 3.730.646 (Affri og andre). Imidlertid er der ikke i nogen af disse patentskrifter nævnt, at en venturi-indretning kan anbringes mellem en åben ekspansionsbeholder og et tryksat væskekredsløb på en sådan måde, at man ved at lade væskecirkulationsorganerne føre en del af væsken igennem venturirøret kan regulere ind- og udløbet af væske mellem det tryksatte kredsløb og den åbne ekspansionsbeholder under atmosfærisk tryk.The use of an ejector or jet pump to circulate water in a circuit with or to support such circulation with is well known and is shown in the following US patents: No. 566,904 g (Gold), 1,418,583 (Lincke), 2,404,114 ( Waterman), 2,843,142 (Gardner), 3,274,065 (Kierulf and others), and 3,730,646 (Affri and others). However, none of these patents mention that a venturi device can be placed between an open expansion vessel and a pressurized liquid circuit in such a way that by allowing the liquid circulating means to pass a portion of the fluid through the venturi tube, the inlet and outlet can be controlled. of liquid between the pressurized circuit and the open expansion vessel under atmospheric pressure.
25 Det er også kendt i et væskekredsløb at benytte en ekspansions beholder, der står i åben forbindelse med det atmosfæriske tryk, som vist i US patent nr. 3.554.441 (Malmstrom). Ekspansionsbeholderen er her forbundet med væskekredsløbet på en sådan måde, at vandet kan strømme ind i og ud af kredsløbet, 2Q afhængigt af trykforskellen mellem kredsløbet og ekspansions beholderen. Overløb fra denne ekspansionsbeholder er undgået ved at forbinde den med en anden ekspansionsbeholder, der er anbragt i lavere højde.It is also known in a liquid circuit to use an expansion vessel openly connected to the atmospheric pressure, as disclosed in U.S. Patent No. 3,554,441 (Malmstrom). The expansion vessel is here connected to the fluid circuit in such a way that the water can flow into and out of the circuit, 2Q depending on the pressure difference between the circuit and the expansion vessel. Overflow from this expansion vessel is avoided by connecting it to another expansion vessel located at a lower height.
25 Fra US patentskrift nr. 667.559 kendes brugen af et venturi- rør i forbindelse med indføring af tilsætningsmidler til en fødeledning til en kedel. Venturirøret er her indskudt i en omløbsledning omkring pumpen i fødeledningen, således at ven-turirørets hals er forbundet med en beholder med det pågæl-3q dende tilsætningsmiddel, hvorved en delstrøm af fødevandet sendes gennem venturirøret, når pumpen kører, således at tilsætningsmidlet indsuges i fødeledningen gennem venturirøret.25 U.S. Patent No. 667,559 discloses the use of a vent tube in connection with the introduction of feed additives into a boiler. The venturi is here inserted into a bypass line around the pump in the feed line, so that the venturi's throat is connected to a container with the appropriate additive, whereby a partial flow of the feed water passes through the venturi as the pump runs, so that the additive is sucked into the feed line. through the venturi tube.
Formålet med opfindelsen er at anvise et anlæg med en tryksat 35 væskekredsløbssektion, hvor den tryksatte ekspansionsbeholder er erstattet med en ekspansionsbeholder under atmosfærisk tryk, og hvor trykket i væskekredsløbssektionen reguleres ved automatisk indføring eller udtagning af væske fra sektionen.The object of the invention is to provide a system with a pressurized liquid circulation section, where the pressurized expansion vessel is replaced with an expansion vessel under atmospheric pressure, and where the pressure in the liquid circulation section is controlled by automatic introduction or withdrawal of liquid from the section.
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Anlægget ifølge opfindelsen er ejendommeligt ved, at venturi-røret er således indrettet og anbragt, at en del af væsken fra pumpeudløbet kan føres gennem venturirørets dyse, hals 5 og diffusor og returneres til kredsløbssektionen foran ind løbet til pumpen, hvorhos ekspansionsbeholderen er tilsluttet venturirøret ved dettes hals. Herved opnås en automatisk regulering af væskestrømmen mellem ekspansionsbeholderen og væskekredsløbssektionen baseret på trykket inden i væskekredsløbs-sektionen. En lille del af væskestrømmen fra pumpeudløbet cirkulerer gennem venturien og tilbage til pumpeindløbet.The system according to the invention is characterized in that the venturi tube is arranged and arranged so that part of the liquid from the pump outlet can be passed through the venturi nozzle, throat 5 and diffuser and returned to the circuit section in front of the pump, where the expansion vessel is connected to the venturi tube. his throat. Hereby, an automatic control of the fluid flow between the expansion vessel and the liquid circulation section is obtained based on the pressure within the liquid circulation section. A small portion of the fluid flow from the pump outlet circulates through the venturi and back to the pump inlet.
Den mængde, der cirkulerer gennem venturien, er relativt lille og forstyrrer ikke den hensigtsmæssige funktion af resten af væskekredsløbet. Under normale driftsforhold har venturiens ^ hals samme tryk som ekspansionsbeholderen (plus et eventuelt hydrostatisk tryk som følge af højdeforskelle), således at der under disse forhold ingen strømning finder sted mellem ekspansionsbeholderen og kredsløbssektionen. Trykforskellen mellem væsken ved venturiens indløbsside foran dysen og ved 20 venturiens hals er fastlagt ved udformningen af venturien.The amount circulating through the venturi is relatively small and does not interfere with the proper functioning of the rest of the fluid circuit. Under normal operating conditions, the venturi's neck has the same pressure as the expansion vessel (plus any hydrostatic pressure due to elevation differences), so that under these conditions no flow takes place between the expansion vessel and the circuit section. The pressure difference between the liquid at the inlet side of the venturi in front of the nozzle and at the throat of the venturi is determined by the design of the venturi.
Derfor vil, hvis trykket i kredsløbet og følgelig ved venturiens indløbsside foran dysen forøges, også trykket i venturiens hals forøges, så at der opretholdes en konstant trykforskel. Når venturihalstrykket stiger over det atmosfæriske 25 tryk (plus et eventuelt hydrostatisk tryk som følge af højde forskelle mellem ekspansionsbeholderen og venturien), vil en del af væsken blive presset fra kredsløbet gennem venturi-halsen og ud i ekspansionsbeholderen, som er i åben forbindelse med det atmosfæriske tryk. Omvendt, hvis væsketrykket 30 i kredsløbet falder, falder trykket i venturihalsen også under atmosfæretrykket og tvinger derved væske til at strømme fra ekspansionsbeholderen ind i venturihalsen og videre ind i kredsløbet.Therefore, if the pressure in the circuit and, consequently, at the inlet side of the venturi in front of the nozzle is increased, the pressure in the neck of the venturi will also be increased so that a constant pressure difference is maintained. As the venturi pressure increases above atmospheric pressure (plus any hydrostatic pressure due to height differences between the expansion vessel and the venturi), a portion of the fluid will be pushed from the circuit through the venturi throat into the expansion vessel which is openly connected to it. atmospheric pressure. Conversely, if the fluid pressure 30 in the circuit decreases, the pressure in the venturi throat also falls below the atmospheric pressure, thereby forcing fluid to flow from the expansion vessel into the venturi throat and further into the circuit.
3g Det ses således, at man ved et passende valg af venturiudform- ning kan opnå et anlæg, hvor venturiens placering gør, at den virker som et simpelt og pålideligt organ til automatisk regulering af væskestrømmen mellem ekspansionsbeholderen og3g It is thus seen that by a suitable choice of venturi design, a system can be obtained where the location of the venturi makes it act as a simple and reliable means for automatically regulating the flow of liquid between the expansion vessel and
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4 væskekredsløbssektionen baseret på trykket inden i sektionen.4 the liquid circuit section based on the pressure within the section.
5 Fordelagtigt kan venturirøret være anbragt inden i pumpehuset, f.eks. i en kanal, der er udformet ud i ét med pumpehuset.Advantageously, the venturi tube may be disposed within the pump housing, e.g. in a duct formed integrally with the pump housing.
Ifølge opfindelsen kan anlægget yderligere omfatte afspærringsorganer til regulering af den væskemængde, der passerer 10 gennem venturirøret, hvorved man yderligere kan regulere tryk forskellen mellem kredsløbssektionen og ekspansionsbeholderen.According to the invention, the plant may further comprise shut-off means for controlling the amount of fluid passing through the venturi tube, thereby further regulating the pressure difference between the circuit section and the expansion vessel.
I den forbindelse kan afspærringsorganerne fordelagtigt være anbragt inden i et hus for venturirøret.In this connection, the shut-off means may advantageously be placed within a housing of the venturi tube.
Opfindelsen beskrives i det følgende nærmere under henvisning til tegningen, hvor fig. 1 viser et skematisk diagram over en væskekredsløbssektion med venturirøret ifølge opfindelsen, 20 fig. 2 en grafisk fremstilling af trykket på forskellige steder langs længdeaksen af det venturirør, der er vist i fig.The invention will now be described in more detail with reference to the accompanying drawings, in which: FIG. 1 is a schematic diagram of a liquid circuit section with the venturi tube according to the invention; FIG. 2 is a graphical representation of the pressure at various locations along the longitudinal axis of the venturi tube shown in FIG.
1, 25 fig. 3 et længdesnit gennem venturirøret, vist i fig. 1, og fig. 4 et delvist snit i et pumpehus med venturirøret fra fig. 3.1, FIG. 3 is a longitudinal section through the venturi tube shown in FIG. 1, and FIG. 4 is a partial sectional view of a pump housing with the venturi tube of FIG. Third
30 I fig. 1 er skematisk vist et diagram over en væskekredsløbs sektion med et venturirør ifølge opfindelsen. Den omfatter en pumpe eller andre cirkulationsorganer 10, der ved sin indløbsside er forbundet med en returledning 12 og ved sin udløbsside står i forbindelse med en fremløbsledning 14, samt 35 et venturirør 20, hvis indløbsside 20a er forbundet med pum pens udløbsside 14, og hvis udløbsside 20c er forbundet med pumpens indløbsside 12. Med henblik på forklaring af opfindelsen kan det antages, at væskekredsløbssektionen er et væskevarmeanlæg, hvori der benyttes vand som cirkulerende medium.In FIG. 1 is a schematic diagram of a liquid circuit section with a venturi according to the invention. It comprises a pump or other circulating means 10, which at its inlet side is connected to a return line 12 and at its outlet side communicates with a flow line 14, and 35 a venturi 20, whose inlet side 20a is connected to the outlet side 14 of the pump, and if outlet side 20c is connected to the inlet side of the pump 12. For purposes of explanation of the invention, it can be assumed that the liquid circuit section is a liquid heating system in which water is used as circulating medium.
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Det skal imidlertid understreges, at denne antagelse kun er af hensyn til forklaringen, og at venturirøret ifølge opfindelsen kan benyttes i forbindelse med en hvilken som helst sluttet g væskekredsløbssektion.However, it should be emphasized that this assumption is for the sake of explanation only and that the venturi tube of the invention can be used in conjunction with any closed g liquid circuit section.
Fremløbsledningen 14 overfører vand fra pumpen 10 til en kedel 16, i hvilken vandet bliver opvarmet og derefter via ledningen 18 føres til resten af sektionen, der ikke er vist, 2Q men som kan være en serie af varmeafgivende organer, der over fører varme fra væsken til et omgivende rum. Efter at have afgivet sin varme recirkuleres vandet til pumpen via returledningen 12.The feed line 14 transfers water from the pump 10 to a boiler 16, in which the water is heated and then passed through the line 18 to the remainder of the section not shown, 2Q but which may be a series of heat dissipating means which transfer heat from the liquid. to a surrounding space. After releasing its heat, the water is recycled to the pump via the return line 12.
^g Venturirøret 20 har et indløb 20a, en hals 20b og et udløb 20c og er forbundet med væskekredsløbssektionen 12,14,16,18 via ledninger 22 og 24 på en sådan måde, at en lille del af det vand, der forlader pumpens udløb, føres ind i indløbet 20a, medens den væske, der træder ud af udløbet 20c, vender 20 tilbage til pumpen 10 via ledningen 24. Halsen 20b er forbundet med ekspansionsbeholderen 26 via en ledning 28. Eftersom ekspansionsbeholderen 26 står i åben forbindelse med den frie atmosfæres tryk, er trykket i venturihalsen også lig med atmosfærens tryk, bortset fra et eventuelt hydrostatisk tryk 25 som følge af højdeforskelle mellem ekspansionsbeholderens og venturirørets placering, så at der under normale driftsforhold ikke finder nogen væskeoverføring sted mellem ekspansionsbeholderen og kredsløbssektionen. Udformningen af venturirøret er foretaget sådan, at der under drift er en konstant 30 trykforskel mellem væsketrykket ved indløbet 20a og væske trykket ved halsen 20b.The venturi tube 20 has an inlet 20a, a neck 20b and an outlet 20c and is connected to the fluid circuit section 12,14,16,18 via lines 22 and 24 in such a way that a small portion of the water leaving the pump outlet , is introduced into the inlet 20a, while the liquid exiting the outlet 20c returns 20 to the pump 10 via conduit 24. The neck 20b is connected to the expansion vessel 26 via a conduit 28. Since the expansion vessel 26 is in open communication with the free atmospheric pressure, the pressure in the venturi throat is also equal to the pressure of the atmosphere, except for any hydrostatic pressure 25 due to height differences between the location of the expansion vessel and the venturi tube, so that under normal operating conditions no fluid transfer takes place between the expansion vessel and the circuit section. The venturi design is designed such that during operation there is a constant pressure difference between the fluid pressure at the inlet 20a and the fluid pressure at the throat 20b.
Trykkene ved venturirørets indløb, hals og udløb, som kaldes henholdsvis P^, P2 og P^, er vist skematisk i fig. 2. Forskellen 35 mellem trykkene P^ og P^ skyldes friktionstab, medens væsken passerer gennem venturirøret. Forskellen mellem trykket P^ og trykket P2 forbliver konstant, således, at hvis trykket P^ i kredsløbssektionen enten stiger eller falder, vil tryk-The pressures at the inlet, throat and outlet of the venturi tube, called P1, P2 and P1, respectively, are shown schematically in FIG. 2. The difference 35 between the pressures P 1 and P 2 is due to loss of friction while the liquid passes through the venturi tube. The difference between the pressure P 1 and the pressure P 2 remains constant such that if the pressure P 1 in the circuit section either increases or decreases,
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6 ket P2 i venturihalsen stige eller falde tilsvarende. Hvis trykket i væskekredsløbssektionen således stiger på grund af forøget temperatur eller forskellige andre faktorer, vil 5 trykket i venturihalsen 20b stige tilsvarende. Denne stigning i trykket P2 skaber en trykforskel mellem venturihalsen 20b og ekspansionsbeholderen 26, som forbliver under atmosfærisk tryk. Denne trykforskel forårsager, at vand føres fra kredsløbssektionen ud i ekspansionsbeholderen 26 via ledningen •j^q 28. Dette giver det nødvendige udløb fra væskekreds løbs sek tionen, der skal til for at forhindre en trykopbygning, som kan forårsage funktionsforstyrrelser og i værste fald brud på væskekredsløbssektionen.6 k P2 in the venturi neck rise or fall accordingly. Thus, if the pressure in the fluid circuit section increases due to increased temperature or various other factors, the pressure in the venturi throat 20b will increase accordingly. This increase in pressure P2 creates a pressure difference between the venturi neck 20b and the expansion vessel 26, which remains under atmospheric pressure. This pressure difference causes water to be discharged from the circuit section into the expansion vessel 26 via the conduit. This provides the necessary outlet from the fluid circuit section which is needed to prevent a pressure build-up that can cause malfunction and, in the worst case, breakage. on the fluid circuit section.
En lignende virkning indtræffer, når trykket i væskekredsløbssektionen falder, siden det tilsvarende fald i venturi-halsens tryk P2 forårsager, at venturihalsens tryk falder under dets normale tryk i forhold til trykket i ekspansionsbeholderen 26. Vand fra ekspansionsbeholderen presses følgelig 20 ind i systemet via ledningen 28, venturirøret 20 og ledningen 24. Dette giver det automatiske tilskud af vand til væskekredsløbssektionen, der skal til for at undgå beskadigelse eller driftsforstyrrelser.A similar effect occurs when the pressure in the fluid circulation section decreases, since the corresponding decrease in the pressure of the venturi throat P2 causes the pressure of the venturi throat to fall below its normal pressure relative to the pressure in the expansion vessel 26. Water from the expansion vessel is accordingly forced into the system via the conduit. 28, the venturi tube 20 and the conduit 24. This provides the automatic addition of water to the fluid circulation section needed to avoid damage or malfunction.
25 Venturirøret er vist i detaljer i fig. 3 og omfatter et hus 30, der har et filter 32, som er fastgjort ved husets indløbsende. Indeholdt i huset 30 findes en dyse 34 og en diffusor 36, hvor arealet mellem dysen 34 og diffusoren 36 danner halsdelen 20b i venturirøret. Halsdelen 20b står i forbindelse 3Q med ledningen 28 via et antal åbninger 38 i huset 30. Huset 30 har også to udløbsporte 40, der står i forbindelse med væskekredsløbssektionen via ledningen 24 og muliggør, at væsken kan strømme tilbage og ind i pumpeindløbet. Afspærringsorganer, der generelt er betegnet med 42, er anbragt i nærheden af 35 venturirørets udløbsende med henblik på at kontrollere mængden af væske, der strømmer gennem venturirøret. Afspærringsorganerne omfatter også to porte 43, der, når de er anbragt på linie med de to udløbsporte 40 i huset 30, tillader maksimalt gennem-The venturi tube is shown in detail in FIG. 3, and comprises a housing 30 having a filter 32 secured to the inlet end of the housing. Included in the housing 30 is a nozzle 34 and a diffuser 36, the area between the nozzle 34 and the diffuser 36 forming the neck portion 20b in the venturi tube. The neck portion 20b communicates with the conduit 28 through a plurality of openings 38 in the housing 30. The housing 30 also has two outlet ports 40 which communicate with the liquid circuit section through the conduit 24 and allow the liquid to flow back and into the pump inlet. Barriers generally designated by 42 are located near the outlet end of the venturi to control the amount of fluid flowing through the venturi. The shut-off means also comprise two ports 43 which, when aligned with the two outlet ports 40 in the housing 30, allow maximum passage
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US4458579A | 1979-06-01 | 1979-06-01 | |
| US4458579 | 1979-06-01 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK492779A DK492779A (en) | 1980-12-02 |
| DK155769B true DK155769B (en) | 1989-05-08 |
| DK155769C DK155769C (en) | 1989-09-25 |
Family
ID=21933174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK492779A DK155769C (en) | 1979-06-01 | 1979-11-20 | PLANT WITH CLOSED LIQUID CIRCUIT SECTION CONTAINING A VENTURIROER |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS605836B2 (en) |
| DE (1) | DE2948029A1 (en) |
| DK (1) | DK155769C (en) |
| FR (1) | FR2458107A1 (en) |
| GB (1) | GB2051341B (en) |
| IT (1) | IT1126502B (en) |
| NL (1) | NL175226C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3447484A1 (en) * | 1984-12-27 | 1986-07-03 | P.I.V. Antrieb Werner Reimers GmbH & Co KG, 6380 Bad Homburg | Hydraulic device for saving drive energy, homogenizing delivery flow or limiting pressure for any hydraulic pump |
| JPH06182973A (en) * | 1992-12-17 | 1994-07-05 | Ryobi Ltd | Number printing press |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US667559A (en) * | 1900-11-16 | 1901-02-05 | George Neubauer | Feeding scale-preventives into boilers. |
| US1418583A (en) * | 1921-03-30 | 1922-06-06 | Lincke Alexander Ru Maximilian | Hot-water heating system |
| GB1386387A (en) * | 1973-07-05 | 1975-03-05 | Porges G | Pressurised liquid heat exchange system with open top feed tank |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB211287A (en) * | 1922-12-15 | 1924-02-21 | John Henry Adlam | Improvements in or relating to hot-water heating-installations |
| US2265108A (en) * | 1940-06-05 | 1941-12-02 | Lillian Fiaker | Controlled circulation water heating system |
| SE308592B (en) * | 1967-12-22 | 1969-02-17 | K Malmstroem | |
| US3987628A (en) * | 1976-03-04 | 1976-10-26 | Deere & Company | Charge pump augmenting device |
-
1979
- 1979-11-13 NL NLAANVRAGE7908293,A patent/NL175226C/en not_active IP Right Cessation
- 1979-11-16 GB GB7939768A patent/GB2051341B/en not_active Expired
- 1979-11-20 DK DK492779A patent/DK155769C/en not_active IP Right Cessation
- 1979-11-29 DE DE19792948029 patent/DE2948029A1/en active Granted
- 1979-12-07 IT IT27911/79A patent/IT1126502B/en active
-
1980
- 1980-03-29 JP JP55039675A patent/JPS605836B2/en not_active Expired
- 1980-05-23 FR FR8011529A patent/FR2458107A1/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US667559A (en) * | 1900-11-16 | 1901-02-05 | George Neubauer | Feeding scale-preventives into boilers. |
| US1418583A (en) * | 1921-03-30 | 1922-06-06 | Lincke Alexander Ru Maximilian | Hot-water heating system |
| GB1386387A (en) * | 1973-07-05 | 1975-03-05 | Porges G | Pressurised liquid heat exchange system with open top feed tank |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2948029A1 (en) | 1980-12-04 |
| FR2458107A1 (en) | 1980-12-26 |
| NL175226B (en) | 1984-05-01 |
| DK492779A (en) | 1980-12-02 |
| IT7927911A0 (en) | 1979-12-07 |
| DK155769C (en) | 1989-09-25 |
| DE2948029C2 (en) | 1987-03-05 |
| NL175226C (en) | 1984-10-01 |
| IT1126502B (en) | 1986-05-21 |
| JPS55163386A (en) | 1980-12-19 |
| FR2458107B1 (en) | 1983-10-28 |
| JPS605836B2 (en) | 1985-02-14 |
| GB2051341B (en) | 1983-12-14 |
| NL7908293A (en) | 1980-12-03 |
| GB2051341A (en) | 1981-01-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |