EP0539373B1 - Device for conveying dense substances - Google Patents
Device for conveying dense substances Download PDFInfo
- Publication number
- EP0539373B1 EP0539373B1 EP91903812A EP91903812A EP0539373B1 EP 0539373 B1 EP0539373 B1 EP 0539373B1 EP 91903812 A EP91903812 A EP 91903812A EP 91903812 A EP91903812 A EP 91903812A EP 0539373 B1 EP0539373 B1 EP 0539373B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- finger
- lamellae
- delivery line
- bearing ring
- output flow
- 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 - Lifetime
Links
- 239000000126 substance Substances 0.000 title abstract 7
- 230000000694 effects Effects 0.000 claims abstract 2
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 229910000639 Spring steel Inorganic materials 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 4
- 230000000452 restraining effect Effects 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000013013 elastic material Substances 0.000 claims description 2
- 239000013590 bulk material Substances 0.000 claims 3
- 238000011144 upstream manufacturing Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 11
- 239000000945 filler Substances 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011344 liquid material Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1037—Flap valves
- F04B53/1047—Flap valves the valve being formed by one or more flexible elements
- F04B53/106—Flap valves the valve being formed by one or more flexible elements the valve being a membrane
- F04B53/1067—Flap valves the valve being formed by one or more flexible elements the valve being a membrane fixed at its whole periphery and with an opening at its centre
-
- 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
- F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
- F04B53/1077—Flow resistance valves, e.g. without moving parts
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S417/00—Pumps
- Y10S417/90—Slurry pumps, e.g. concrete
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7854—In couplings for coaxial conduits, e.g., drill pipe check valves
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7879—Resilient material valve
- Y10T137/788—Having expansible port
- Y10T137/7882—Having exit lip
- Y10T137/7885—Multiple slit
Definitions
- Device for conveying thick matter, sludge and the like conveyed material with a preferably oscillating thick matter pump, a delivery line connected on the pressure side to the thick matter pump and a delivery line arranged in the conveying line, which expands automatically under the influence of the conveyed material flowing in the conveying direction and stops or counteracts
- Conveying direction directed conveying material flow restricting passage opening having a plurality of finger slats arranged at an angular distance from each other, delimiting the passage opening, one-sidedly fixed in the area of the inner surface of the conveying line and with its free ends extending obliquely in the conveying direction towards the inside of the conveying line.
- the finger lamellae are arranged and designed in such a way that, in the state blocking the delivery line, they lie tightly against one another with their lateral boundary surfaces up to their tip. It is perceived as a disadvantage that when conveying thick materials with admixtures of solids there is a risk that the finger lamellas jam or rub against one another when spreading or closing, so that malfunctions can occur.
- the invention has for its object to improve the device of the type specified in such a way that mutual jamming of the finger slats is largely avoided.
- the invention is based on the idea that mutual contact of the lateral boundary surfaces of the finger lamellae must be prevented and that at the same time the overlap of the delivery line cross section must be sufficiently large to minimize the backflow of liquid material to be conveyed.
- the retaining member has several, preferably two, groups of finger lamellae arranged at a short distance from one another in the conveying direction, that the finger lamellae of each group are arranged at a distance from one another in the locked state with the opening of slot openings between their mutually facing lateral boundary surfaces, that the finger blades of one group at least partially cover the slot openings between the adjacent finger blades of the other group.
- the installation of the retaining element in the delivery line can be simplified in that the finger lamellae are attached to the inside of a support ring that can be inserted into the delivery line in the area of a pipe coupling.
- the support ring is expediently clamped in the axial direction between opposite end faces of two pipe sections of the delivery line that can be coupled together.
- the delivery line can have a conically tapering internal cross section in the conveying direction in front of the support ring and a step-shaped widening in the area of the support ring.
- Finger slats made of spring steel are appropriate screwed to a rigid support ring or vulcanized into a support ring made of rubber-elastic material.
- the conveyor system shown in the drawing has a single-cylinder piston pump 14 and a delivery line 12 connected on the pressure side and containing a retaining element 10. It is primarily intended for the conveyance of thick matter and sludge.
- the single-cylinder piston pump 14 essentially consists of a filler shaft 16, a feed cylinder 20 projecting from the end of the filler shaft 16 and connected to it via an inlet opening 18, and a feed piston 24 which can be moved hydraulically between two end positions on a fixed piston rod 22.
- the restraining member 10 has one in the area of a Pipe coupling 26 in the delivery line 12 supporting ring 28 and a plurality of angularly spaced spring-elastic finger plates 30, 30 ', which engage in the interior of the delivery line 12 formed as a cylinder tube and limit the passage opening 32.
- the delivery line 12 has in the area of the retaining member 10 a short tube piece 44 provided with an end recess 42, which can be coupled to a connecting flange 48 fastened by tie rods 46 in the area of the outlet opening of the delivery cylinder 20.
- the support ring 28 of the retaining member 10 inserted into the recess 42 is clamped between the mutually opposite end faces of the pipe section 44 and the connecting flange 48 when these are pressed against one another in the axial direction during coupling by the half-shells 50 of the coupling 26.
- the pipe coupling 26 is sealed by a sealing ring 54 which bears against the circumference of the support ring 28 and is arranged in an annular gap 52 between the end faces of the pipe section 44 and the connecting flange 48.
- the connecting flange 48 has one between the outlet opening of the feed cylinder 20 and its end face resting on the supporting ring conically tapered inner cross-section so that the conveyed material pressed out of the conveying cylinder 20 cannot jam at the heads of the retaining screws 36.
- the restraining member 10 shown in FIG. 2 has two Rows of distributed over the circumference of the support ring 28 arranged finger blades 30 and 30 '.
- the finger blades 30 each consist of a substantially wedge-shaped curved spring steel sheet, which is screwed to its wider end facing the single-cylinder piston pump 14 against the inner peripheral surface 34 of the support ring 28 with retaining screws 36.
- the from the inside of the passage opening 32 against the finger lamellae 30 adjacent finger lamellae 30 ' close the slot openings 40 formed between the finger lamellae 30 in a predominant area, so that even fluid material is retained.
- the passage opening 32 is formed by a central opening 38 surrounded by the free ends of the finger slats 30 and by the areas of the slit openings 40, each of which remains free between the mutually facing lateral boundary surfaces of two adjacent finger slats 30 (FIGS. 1 and 2).
- the material to be conveyed is pressed out of the filling shaft 16 into the delivery cylinder 20 and from there into the delivery line 12.
- the free ends of the finger lamellae 30 are bent apart by the material to be conveyed moving in the conveying direction with an elastic widening of the passage opening 32, so that they bear against the inner surface of the pipe section 44 under prestress.
- the delivery plunger 24 After reaching its front dead center, the delivery plunger 24 is pulled back in the suction stroke up to the front side of the feed chute 16 opposite the inlet opening 18, with material to be conveyed falling or flowing out of the feed chute 16 into the space which is freed up in front of the end face of the delivery plunger 24.
- the finger lamellae 30 of the retaining element 10 bend due to their pretensioning and are supported by the negative pressure which arises in the delivery cylinder 20 during the withdrawal of the delivery piston 24 and / or by the hydrostatic pressure in the delivery line 12 in FIG. 1 and 2 shown rest position and thereby prevent material to flow back from the feed line 12 into the feed cylinder 20.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- General Details Of Gearings (AREA)
Abstract
Description
Vorrichtung zur Förderung von Dickstoffen, Schlämmen und dergleichen Fördergut, mit einer vorzugsweise oszillierend arbeitenden Dickstoffpumpe, einer druckseitig an die Dickstoffpumpe angeschlossenen Förderleitung und einem in der Förderleitung angeordneten, eine sich selbsttätig unter der Einwirkung des in Förderrichtung strömenden Förderguts aufweitende und bei aufhörender oder entgegen der Förderrichtung gerichteter Fördergutströmung verengende Durchtrittsöffnung aufweisenden Rückhalteorgan, das mehrere in Winkelabständen voneinander sternförmig angeordnete, die Durchtrittsöffnung begrenzende, im Bereich der Innenfläche der Förderleitung einseitig befestigte und sich mit ihren freien Enden schräg in Förderrichtung nach dem Inneren der Förderleitung erstreckende Fingerlamellen aufweist.Device for conveying thick matter, sludge and the like conveyed material, with a preferably oscillating thick matter pump, a delivery line connected on the pressure side to the thick matter pump and a delivery line arranged in the conveying line, which expands automatically under the influence of the conveyed material flowing in the conveying direction and stops or counteracts Conveying direction directed conveying material flow restricting passage opening having a plurality of finger slats arranged at an angular distance from each other, delimiting the passage opening, one-sidedly fixed in the area of the inner surface of the conveying line and with its free ends extending obliquely in the conveying direction towards the inside of the conveying line.
Bei einer aus der US-PS 3 199 457 bekannten Vorrichtung dieser Art sind die Fingerlamellen so angeordnet und ausgebildet, daß sie im die Förderleitung versperrenden Zustand mit ihren seitlichen Begrenzungsflächen bis zu ihrer Spitze hin dicht gegeneinander anliegen. Hierbei wird als nachteilig empfunden, daß beim Fördern von Dickstoffen mit Feststoffbeimischungen die Gefahr besteht, daß sich die Fingerlamellen beim Aufspreizen bzw. Schließen gegenseitig verklemmen oder gegeneinander reiben, so daß es zu Fehlfunktionen kommen kann.In a device of this type known from US Pat. No. 3,199,457, the finger lamellae are arranged and designed in such a way that, in the state blocking the delivery line, they lie tightly against one another with their lateral boundary surfaces up to their tip. It is perceived as a disadvantage that when conveying thick materials with admixtures of solids there is a risk that the finger lamellas jam or rub against one another when spreading or closing, so that malfunctions can occur.
Weiterhin ist es bei einem für Saugschläuche zahnmedizinischer Absauggeräte vorgesehenen, in lamellenartige Segmente unterteilten gummielastischen Verschlußorgan zwar an sich bekannt (DE-OS 1 816 790), an den Trennfugen zwischen den Segmenten Dichtlippen vorzusehen, die dort einen die Trennfugen durchdringenden Gasstrom verhindern sollen. Für den Einsatz in einer Förderleitung wäre ein solches Verschlußorgans jedoch ungeeignet, insbesondere da die mit den einzelnen Segmenten verbundenen Dichtlippen die Gefahr des Verklemmens beim Durchtritt von feststoffhaltigem grobstückigem Fördergut noch erhöhen würden.Furthermore, it is known per se (DE-OS 1 816 790) to provide sealing lips at the parting lines between the segments, which are intended to prevent a gas flow penetrating the parting lines there, in a rubber-elastic closure member provided for suction hoses of dental suction devices and divided into lamellar segments. Such a closure member would, however, be unsuitable for use in a delivery line, in particular since the sealing lips connected to the individual segments would further increase the risk of jamming when large, solid material to be conveyed passes through.
Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, die Vorrichtung der eingangs angegebenen Art dahingehend zu verbessern, daß ein gegenseitiges Verklemmen der Fingerlamellen weitgehend vermieden wird.Proceeding from this, the invention has for its object to improve the device of the type specified in such a way that mutual jamming of the finger slats is largely avoided.
Zur Lösung dieser Aufgabe werden erfindungsgemäß die im Kennzeichenteil des Patentanspruchs 1 angegebenen Merkmale vorgeschlagen. Weitere vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.To achieve this object, the features specified in the characterizing part of claim 1 are proposed according to the invention. Further advantageous refinements and developments of the invention result from the dependent claims.
Der Erfindung liegt der Gedanke zugrunde, daß eine gegenseitige Berührung der seitlichen Begrenzungsflächen der Fingerlamellen verhindert werden muß, und daß gleichzeitig die Überdeckung des Förderleitungsquerschnitts zur Minimierung des Rückströmens von flüssigem Fördergut genügend groß sein muß. Um dies zu erreichen, wird gemäß der Erfindung vorgeschlagen, daß das Rückhalteorgan mehrere, vorzugsweise zwei in Förderrichtung in geringem Abstand voneinander angeordnete Gruppen von Fingerlamellen aufweist, daß die Fingerlamellen einer jeden Gruppe im Sperrzustand unter Freilassung von Schlitzöffnungen zwischen ihren einander zugewandten seitlichen Begrenzungsflächen im Abstand voneinander angeordnet sind, daß die Fingerlamellen der einen Gruppe die Schlitzöffnungen zwischen den benachbarten Fingerlamellen der anderen Gruppe zumindest teilweise überdecken.The invention is based on the idea that mutual contact of the lateral boundary surfaces of the finger lamellae must be prevented and that at the same time the overlap of the delivery line cross section must be sufficiently large to minimize the backflow of liquid material to be conveyed. To achieve this, It is proposed according to the invention that the retaining member has several, preferably two, groups of finger lamellae arranged at a short distance from one another in the conveying direction, that the finger lamellae of each group are arranged at a distance from one another in the locked state with the opening of slot openings between their mutually facing lateral boundary surfaces, that the finger blades of one group at least partially cover the slot openings between the adjacent finger blades of the other group.
Der Einbau des Rückhalteorgans in die Förderleitung kann dadurch vereinfacht werden, daß die Fingerlamellen an der Innenseite eines im Bereich einer Rohrkupplung in die Förderleitung einsetzbaren Tragrings befestigt sind.The installation of the retaining element in the delivery line can be simplified in that the finger lamellae are attached to the inside of a support ring that can be inserted into the delivery line in the area of a pipe coupling.
Der Tragring ist dabei zweckmäßig in axialer Richtung zwischen einander gegenüberliegenden Stirnflächen zweier miteinander kuppelbarer Rohrstücke der Förderleitung einspannbar.The support ring is expediently clamped in the axial direction between opposite end faces of two pipe sections of the delivery line that can be coupled together.
Um zu verhindern, daß sich Fördergut an einem nach innen überstehenden Tragring bzw. an den eingespannten Enden der Fingerlamellen staut, kann die Förderleitung in Förderrichtung vor dem Tragring einen sich konisch verjüngenden Innenquerschnitt und im Bereich des Tragrings eine stufenförmige Erweiterung aufweisen.In order to prevent material to be jammed on an inwardly projecting support ring or on the clamped ends of the finger lamellae, the delivery line can have a conically tapering internal cross section in the conveying direction in front of the support ring and a step-shaped widening in the area of the support ring.
Aus Federstahl bestehende Fingerlamellen sind zweckmäßig an einem starren Tragring festgeschraubt oder in einem aus gummielastischem Material bestehenden Tragring einvulkanisiert.Finger slats made of spring steel are appropriate screwed to a rigid support ring or vulcanized into a support ring made of rubber-elastic material.
Im folgenden wird die Erfindung anhand zweier in der Zeichnung in schematischer Weise dargestellter vorteilhafter Ausführungsbeispiele näher erläutert. Es zeigen
- Fig. 1
- eine schematische Darstellung einer Dickstoff-Förderanlage in teilweise geschnittener perspektivischer Darstellung;
- Fig. 2
- einen Längsschnitt durch das Rückhalteorgan der Förderanlage nach Fig. 1.
- Fig. 1
- a schematic representation of a thick matter conveyor system in a partially sectioned perspective view;
- Fig. 2
- 2 shows a longitudinal section through the retaining element of the conveyor system according to FIG. 1.
Die in der Zeichnung dargestellte Förderanlage weist eine Einzylinder-Kolbenpumpe 14 und eine druckseitig angeschlossene, ein Rückhalteorgan 10 enthaltende Förderleitung 12 auf. Sie ist vor allem zur Förderung von Dickstoffen und Schlämmen bestimmt.The conveyor system shown in the drawing has a single-
Die Einzylinder-Kolbenpumpe 14 besteht im wesentlichen aus einem Einfüllschacht 16, einem stirnseitig über den Einfüllschacht 16 überstehenden und über eine Eintrittsöffnung 18 mit diesem verbundenen Förderzylinder 20 sowie einem auf einer feststehenden Kolbenstange 22 zwischen zwei Endstellungen hydraulisch verschiebbaren Förderkolben 24.The single-
Das Rückhalteorgan 10 weist einen im Bereich einer Rohrkupplung 26 in die Förderleitung 12 eingesetzten Tragring 28 und mehrere, in Winkelabständen voneinander sternförmig angeordnete federelastische Fingerlamellen 30, 30′ auf, welche in den Innenraum der als Zylinderrohr ausgebildeten Förderleitung 12 eingreifen und die Durchtrittsöffnung 32 begrenzen.The
Die Förderleitung 12 weist im Bereich des Rückhalteorgans 10 ein mit einer stirnseitigen Ausdrehung 42 versehenes kurzes Rohrstück 44 auf, das mit einem durch Zuganker 46 im Bereich der Austrittsöffnung des Förderzylinders 20 befestigten Anschlußflansch 48 kuppelbar ist. Der in die Ausdrehung 42 eingesetzte Tragring 28 des Rückhalteorgans 10 wird zwischen den einander gegenüberliegenden Stirnflächen des Rohrstücks 44 und des Anschlußflansches 48 eingespannt, wenn diese beim Kuppeln von den Halbschalen 50 der Kupplung 26 in axialer Richtung gegeneinander gedrückt werden. Die Abdichtung der Rohrkupplung 26 erfolgt durch einen am Umfang des Tragrings 28 anliegenden, in einem Ringspalt 52 zwischen den Stirnseiten des Rohrstücks 44 und des Anschlußflansches 48 angeordneten Dichtring 54. Der Anschlußflansch 48 weist zwischen der Austrittsöffnung des Förderzylinders 20 und seiner am Tragring anliegenden Stirnfläche einen sich konisch verjüngenden Innenquerschnitt auf, so daß sich das aus dem Förderzylinder 20 gepreßte Fördergut nicht an den Köpfen der Halteschrauben 36 stauen kann.The delivery line 12 has in the area of the retaining member 10 a
Das in Fig. 2 dargestellte Rückhalteorgan 10 weist zwei Reihen von über den Umfang des Tragrings 28 verteilt angeordneten Fingerlamellen 30 bzw. 30′ auf. Die Fingerlamellen 30 bestehen jeweils aus einem im wesentlichen keilförmig zugeschnittenen gebogenen Federstahlblech, welches an seinem breiteren, der Einzylinder-Kolbenpumpe 14 zugewandten Ende gegen die innere Umfangsfläche 34 des Tragrings 28 anliegend mit Halteschrauben 36 an diesem festgeschraubt ist. Die von der Innenseite der Durchtrittsöffnung 32 her gegen die Fingerlamellen 30 anliegenden Fingerlamellen 30′ verschließen die zwischen den Fingerlamellen 30 gebildeten Schlitzöffnungen 40 in einem überwiegenden Bereich, so daß auch dünnflüssiges Fördergut zurückgehalten wird. Bei entspannten Fingerlamellen wird die Durchtrittsöffnung 32 durch eine von den freien Enden der Fingerlamellen 30 umgebene Zentralöffnung 38 sowie durch die Bereiche der Schlitzöffnungen 40 gebildet, welche jeweils zwischen den einander zugewandten seitlichen Begrenzungsflächen zweier benachbarter Fingerlamellen 30 freibleiben (Fig. 1 und 2).The
Während des Druckhubs des Förderkolbens 24 der Einzylinder-Kolbenpumpe 14 wird das Fördergut aus dem Einfüllschacht 16 in den Förderzylinder 20 und von dort in die Förderleitung 12 gedrückt. Die freien Enden der Fingerlamellen 30 werden dabei von dem in Förderrichtung bewegten Fördergut unter elastischer Aufweitung der Durchtrittsöffnung 32 auseinandergebogen, so daß sie unter Vorspannung an der Innenfläche des Rohrstücks 44 anliegen.During the pressure stroke of the
Nach Erreichen seines vorderen Totpunktes wird der Förderkolben 24 im Saughub bis zu der der Eintrittsöffnung 18 gegenüberliegenden Stirnseite des Einfüllschachts 16 zurückgezogen, wobei Fördergut aus dem Einfüllschacht 16 in den vor der Stirnfläche des Förderkolbens 24 freiwerdenden Raum nachfällt oder nachfließt. Dabei biegen sich bei Beginn des Saughubs die Fingerlamellen 30 des Rückhalteorgans 10 aufgrund ihrer Vorspannung und unterstützt durch den während des Zurückziehens des Förderkolbens 24 im Förderzylinder 20 entstehenden Unterdruck und/oder durch den hydrostatischen Druck in der Förderleitung 12 in ihre in Fig. 1 und 2 dargestellte Ruhelage zurück und verhindern dadurch, daß Fördergut aus der Förderleitung 12 in den Förderzylinder 20 zurückströmt.After reaching its front dead center, the
Claims (9)
- An apparatus for conveying thick matter, mud, and bulk material of that kind, comprising a thick matter pump (14), which works preferably with an oscillating motion , a delivery line (12) which is attached to the thick matter pump on the delivery side, and a restraining member (10), which is arranged in the delivery line and automatically widens a pass-through opening (32) under the effect of the bulk material flowing in the direction of output flow and narrows said pass-through opening when the flow of the bulk material stops or when it is directed contrary to the direction of output flow, and which is comprised of several finger lamellae (30), which are arranged at angular distances from one another in a star shape and form the boundary of the pass-through opening (32), and are secured on one side in the area of the inner surface of the delivery line, and extend with their unattached ends diagonally in the direction of output flow toward the inside of the delivery line (12),
characterized in that the restraining member (10) has several, preferably two, groups of finger lamellae (30 or 30′) which are arranged in the direction of output flow at a slight distance from one another, that, in the blocking state, the finger lamellae (30, 30′) of each group are arranged at a distance from one another, while leaving open slit-type openings (40) between their lateral boundary surfaces that face one another, and that the finger lamellae (30 or 30′) of the one group cover, at least in part, the slit-type openings (40) between the adjacent finger lamellae (30 or 30′) of the other group. - The apparatus according to claim 1,
characterized in that in the blocking state, the unattached, front-side ends of the finger lamellae (30) are arranged at a distance from one another, while leaving open a small central opening. - The apparatus according to claim 1 or 2,
characterized in that in the blocking state, the finger lamellae (30) are concavely bent in the direction of output flow toward the central opening (38). - The apparatus according to one of the claims 1 through 3,
characterized in that the finger lamellae (30, 30′) are secured to a bearing ring (28), which is inserted into the delivery line (12) in the vicinity of a pipe coupling (26). - The apparatus according to claim 1,
characterized in that the bearing ring (28) is able to be inserted in the axial direction between mutually opposing end faces of two pipe liners (44, 48) of the delivery line (12), which are able to be coupled together. - The apparatus according to claim 4 or 5,
characterized in that the delivery line has an interior cross-section which is conically tapered in the direction of output flow, upstream from the bearing ring (28), and a stepped widening in the vicinity of the bearing ring (28). - The apparatus according-to one of the claims 4 through 6,
characterized in that the finger lamellae (30) consisting of spring steel are fastened with screws to the bearing ring (28). - The apparatus according to one of the claims 4 through 6,
characterized in that the finger lamellae (30) consisting of spring steel are vulcanized on to the inside of the bearing ring consisting of rubber elastic material. - The apparatus according to one of the claims 2 through 8,
characterized in that at least two of the front-side ends of the stress-relieved finger lamellae (30) abut against each other while completely sealing off the central opening.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4022357 | 1990-07-13 | ||
| DE4022357 | 1990-07-13 | ||
| PCT/EP1991/000304 WO1992001158A1 (en) | 1990-07-13 | 1991-02-16 | Device for conveying dense substances |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0539373A1 EP0539373A1 (en) | 1993-05-05 |
| EP0539373B1 true EP0539373B1 (en) | 1994-11-30 |
Family
ID=6410235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91903812A Expired - Lifetime EP0539373B1 (en) | 1990-07-13 | 1991-02-16 | Device for conveying dense substances |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5340291A (en) |
| EP (1) | EP0539373B1 (en) |
| JP (1) | JP3140771B2 (en) |
| DE (2) | DE4104693A1 (en) |
| WO (1) | WO1992001158A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007058886A1 (en) | 2007-12-05 | 2009-06-10 | Putzmeister Concrete Pumps Gmbh | Device for transporting solid, particularly bulk material, has transport cylinder, and material feed container for filling transport cylinder, and piston pump has conveyor piston to transport solid from transport cylinder in conveyor line |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4228806B4 (en) * | 1992-08-29 | 2004-03-04 | Putzmeister Ag | Device for conveying thick matter |
| US6050786A (en) * | 1998-08-19 | 2000-04-18 | Delta Electronics, Inc. | Heat dissipation structure of a fan unit |
| US6918526B1 (en) * | 2004-05-27 | 2005-07-19 | Wen-Sheng Huang | Muffler for staple guns |
| US8191571B2 (en) * | 2008-07-30 | 2012-06-05 | Hamilton Sundstrand Corporation | Fluid circuit breaker quick disconnect coupling |
| KR101150658B1 (en) * | 2008-08-29 | 2012-05-29 | 이근상 | Aperture Type Variable Valve |
| US10125879B2 (en) * | 2011-08-03 | 2018-11-13 | Eco-Blu Pool Components Llc | Pool filter systems including pool fittings |
| US9046394B2 (en) | 2013-01-07 | 2015-06-02 | Sensus Spectrum Llc | Water meter including variable orifice device |
| US11326490B2 (en) * | 2018-05-02 | 2022-05-10 | Faurecia Emissions Control Technologies, Usa, Llc | Variable restriction valve for vehicle exhaust system |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7210028U (en) * | 1973-07-19 | Deutsche Gold Und Silber Scheideanstalt | Pump for conveying finely divided, powdery substances | |
| DE571874C (en) * | 1933-03-06 | Carlshuette Akt Ges Fuer Eisen | Rubber lip valve | |
| FR489760A (en) * | 1918-04-15 | 1919-03-11 | Gabriel Marie Dupuis | Exhaust pump device |
| DE510960C (en) * | 1928-09-26 | 1930-10-24 | Willy Brandegger Dipl Ing | Device for flow control in pipelines |
| DE818605C (en) * | 1949-04-17 | 1951-10-25 | Kalin Feinbau G M B H | Self-priming piston or diaphragm pump for impure liquids |
| US2897835A (en) * | 1956-02-29 | 1959-08-04 | Imp Brass Mfg Co | Vacuum breaker |
| US3058430A (en) * | 1959-08-13 | 1962-10-16 | Handl Egon | Pump for concrete and mortar mixtures and the like |
| FR1301646A (en) * | 1961-09-23 | 1962-08-17 | Rheinisches Metallwerk Gmbh | Anti-reflux device which can be fitted in liquid conduits, in particular in the shut-off device plug |
| US3174434A (en) * | 1963-06-24 | 1965-03-23 | Tait Mfg Co The | Sump pump |
| US3199457A (en) * | 1963-09-26 | 1965-08-10 | Ustick Repair & Custom Mfg | Reciprocating pump |
| DE1816790A1 (en) * | 1968-12-21 | 1970-07-02 | Duerr Dental Ohg | Closure for pressure and especially suction lines |
| US3749521A (en) * | 1970-10-01 | 1973-07-31 | M Coone | Method and apparatus for an aggregate pump |
| US3895646A (en) * | 1973-11-30 | 1975-07-22 | Manuel G Howat | Self-regulating vane type valve for controlling fluid flow |
| US4067540A (en) * | 1976-04-07 | 1978-01-10 | Slade Edward C | Segmented plug valve |
| SU693045A1 (en) * | 1978-05-29 | 1979-10-25 | Всесоюзный Строительный Трест По Механизации Работ "Энергомеханизация" | Concrete pump |
| US4465102A (en) * | 1982-05-17 | 1984-08-14 | The Warren Rupp Company | Check valve |
-
1991
- 1991-02-15 DE DE4104693A patent/DE4104693A1/en not_active Withdrawn
- 1991-02-16 DE DE59103717T patent/DE59103717D1/en not_active Expired - Fee Related
- 1991-02-16 WO PCT/EP1991/000304 patent/WO1992001158A1/en active IP Right Grant
- 1991-02-16 EP EP91903812A patent/EP0539373B1/en not_active Expired - Lifetime
- 1991-02-16 US US07/961,918 patent/US5340291A/en not_active Expired - Lifetime
- 1991-02-16 JP JP03503977A patent/JP3140771B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007058886A1 (en) | 2007-12-05 | 2009-06-10 | Putzmeister Concrete Pumps Gmbh | Device for transporting solid, particularly bulk material, has transport cylinder, and material feed container for filling transport cylinder, and piston pump has conveyor piston to transport solid from transport cylinder in conveyor line |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0539373A1 (en) | 1993-05-05 |
| DE4104693A1 (en) | 1992-01-16 |
| JP3140771B2 (en) | 2001-03-05 |
| WO1992001158A1 (en) | 1992-01-23 |
| DE59103717D1 (en) | 1995-01-12 |
| US5340291A (en) | 1994-08-23 |
| JPH05507985A (en) | 1993-11-11 |
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