WO2009006649A1 - Tuyau de pompe péristaltique - Google Patents

Tuyau de pompe péristaltique Download PDF

Info

Publication number
WO2009006649A1
WO2009006649A1 PCT/ZA2008/000058 ZA2008000058W WO2009006649A1 WO 2009006649 A1 WO2009006649 A1 WO 2009006649A1 ZA 2008000058 W ZA2008000058 W ZA 2008000058W WO 2009006649 A1 WO2009006649 A1 WO 2009006649A1
Authority
WO
WIPO (PCT)
Prior art keywords
strands
hose according
hose
flange
tubular
Prior art date
Application number
PCT/ZA2008/000058
Other languages
English (en)
Inventor
Raymond William Hinks
Original Assignee
Raymond William Hinks
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 Raymond William Hinks filed Critical Raymond William Hinks
Publication of WO2009006649A1 publication Critical patent/WO2009006649A1/fr

Links

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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F04B43/0072—Special features particularities of the flexible members of tubular flexible members
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/123—Machines, pumps, or pumping installations having flexible working members having peristaltic action using an excenter as the squeezing element
    • 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
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • F04B43/1269—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing the rotary axes of the rollers lying in a plane perpendicular to the rotary axis of the driving motor

Definitions

  • This invention relates to a hose of a kind which is suitable for use in a peristaltic pump.
  • a peristaltic pump hose typically includes multiple layers of continuous, helically wound, reinforcing strands positioned between layers of elastomeric material which make up a body of the hose.
  • the helical angle at which the strands are laid is carefully controlled and each layer is wound in an opposite sense to an adjacent layer.
  • the hose is vulcanized and thereafter is carefully finished to ensure that it has a constant wall thickness throughout its length.
  • the ends of the hose can be fixed to a pump casing using a variety of techniques.
  • Use can for example be made of an encircling clamp or compression device which includes a tubular internal supporting structure to prevent the hose from collapsing when it is compressed.
  • a clamp or compression device of this kind, requires the use of spacing elements and special flanges, and seals which prevent leakage of a lubricant which is held in the pump casing.
  • each hose end with a flange which is reinforced with ring formations.
  • This method requires a port, in a pump casing, with which the hose end is engaged, to be enlarged to receive the flange.
  • external supporting devices such as split sleeves or collets are used together with flexible sealing rings.
  • An object of the invention is to provide a hose for a peristaltic pump which can easily be secured to a pump casing. A further objective is to ensure that a lubricant, held within the pump casing, is effectively sealed without using a dedicated seal.
  • the invention provides a hose for a peristaltic pump which includes an elongate, tubular, elastomeric body in which are embedded reinforcing strands and wherein, at least at one end, the body has a zone which includes an inner tubular body portion with a first set of reinforcing strands, an outer tubular body portion with a second set of reinforcing strands, and a cylindrical void between opposing surfaces of the body portions.
  • the first set of strands may extend helically within the inner tubular body portion.
  • the first set of strands may be in one or in a plurality of layers and, in the latter case, the strands in one layer may extend helically in an opposite sense to helical strands in an adjacent layer.
  • the second set of strands may extend longitudinally within the outer tubular body portion.
  • the second set of strands may be in a single layer or in two or more layers.
  • Helical strands in the body, away from the zone, may be continued into the zone as the first set of strands and as the second set of strands.
  • Each end of the hose is preferably similarly constructed.
  • the hose may be engaged with a connector which has a tubular formation which is located in the void and a flange, with fastening formations, from which the tubular formation projects.
  • the tubular formation may have a tubular shell with a base adjacent the flange and a terminal portion at an end which is remote from the flange, and the thickness of the shell may decrease in a direction from the base to the terminal portion.
  • An inner surface of the tubular shell may be substantially circular-cylindrical and an outer surface of the tubular shell may be substantially frusto-conical.
  • Keying formations may be provided on the inner surface and on the outer surface.
  • the keying formations are preferably serrated or saw-tooth formations which may extend concentrically around each surface.
  • the flange has an annular recess adjacent the base of the tubular shell in which an end section of the inner tubular body portion of the hose is located.
  • the end section may be thicker than the minimum width of the annular recess. This requires the end section to be compressed when the end section is inserted into the recess.
  • the fastening formations on the flange may include first formations for securing the flange to a pump casing and second formations for securing the flange to a connecting pipe.
  • the invention also extends to a peristaltic pump which includes a casing, a chamber inside the casing, a port with a frusto-conical inner wall, a hose of the aforementioned kind located in the chamber with at least part of an outer surface of the outer tubular body portion in contact with the frusto-conical inner wall, and fasteners, engaged with the first formations, which secure the flange to the casing.
  • Each end of the hose may be secured to the pump casing in the same way.
  • Figure 1 is a side view in cross-section of an end of a hose for a peristaltic pump according to the invention
  • Figure 2 is an outer view of the hose end shown in Figure 1 with strand reinforcements in a body of the hose highlighted;
  • Figure 3 is similar to Figure 2 but showing the hose end deformed for installation purposes;
  • Figure 4 shows the hose end of Figure 1 and a connector which is engagable with the hose end;
  • Figures 5 to 8 show the hose end with the connector of Figure 4 in successive stages of engagement with the hose end;
  • Figure 9 is a front view of a peristaltic pump to which a hose of the kind shown in
  • Figure 10 is a side view, partly cross-sectioned, of the pump shown in Figure 9; and Figure 11 is an enlarged view of a portion of the pump shown in Figures 9 and 10 illustrating the fixing of a hose end to a port in a casing of the pump.
  • FIG. 1 of the accompanying drawings illustrates a portion of a hose 10 for a peristaltic pump.
  • the hose includes an elongate tubular body 12 which is formed form an elastomeric material 14 e.g. rubber, in which are embedded reinforcing strands 16.
  • a circular cylindrical void 18 is formed in an end 20 of the body. The void extends axially into the body for the length 22 of a zone 24 adjacent the end 20.
  • the reinforcing strands 16 are embedded in the body in two sets 16A and 16B.
  • the strands e.g. of a reinforcing fabric such as a rayon or nylon thread are in two layers such that the strands in one layer extend helically in a first rotational sense, around the bore, which is opposite to the helical direction of rotation of the strands in the other layer in the set.
  • the void 18 divides the body into an inner tubular body portion
  • the cylindrical void 18 is located between opposing surfaces of the body portions 30 and 32.
  • the helical strands in the set 16A extend uninterrupted to the end 20 of the body and form a first set 34 of strands which are embedded in the inner tubular body portion.
  • the strands in the set 16B which are displaced outwardly relative to the strands in the set 16A also extend to the end 20 of the body but, in the zone 24, are arranged to form a longitudinally extending set 36 of strands which are embedded in the outer tubular body portion 32.
  • FIG. 1 is a somewhat schematic side view of the end of the hose 10, which is shown in Figure 1.
  • the helically disposed strands in the sets 16A and 16B which are regularly arranged, are indicated by means of a helical pattern 42.
  • the longitudinally extending strands 36, in the zone 24, are indicated by a horizontally extending array 44.
  • the zone 24 has the same external dimensions as the remainder of the hose body.
  • Figure 3 is similar to Figure 2 but it schematically depicts the use of a cone or wedge 46 which is urged into the void 18 to enlarge the zone 24 over the length 22 in a frusto-conical manner. It is pointed out that if the strands continued in a helically wound disposition into the zone, the cone or wedge would not be able, with ease, to flare the material in the zone 24.
  • Figure 4 is a simplified view of the hose portion shown in Figure 1 and, where applicable, like reference numerals are used to designate like components.
  • Figure 4 illustrates, as well, in cross-section, a connector 50 which is custom-designed for use with the hose.
  • the connector includes a tubular shell 52 and a flange 54 from which the shell 52 projects.
  • the flange as is more clearly shown in Figure 10, has a square shape (this is exemplary only, and not limiting) and has a number of fastening formations 56.
  • the formations are made up of a first set of outer holes 56A which provide a means for attachment of the flange to a casing 60 of a peristaltic pump 62 and threaded holes 56B which are circularly disposed around a central axis 66 of the tubular formation and which receive bolts 68 in order to secure a flange 70 of a pipe 72 to the flange 54 - see Figure 9.
  • the tubular shell 52 has a base 76 which is adjacent the flange and a terminal portion 78 which is remote from the flange. The thickness of the shell decreases in a direction from the base to the terminal portion.
  • An inner surface 80 of the tubular shell is substantially circular cylindrical and an outer surface 82 of the shell is substantially frusto-conical.
  • Keying formations 84 are formed on the inner and outer surfaces. These formations are of any appropriate shape and size and for example are serrated or saw-tooth formations which extend in concentric rings on the inner and outer surfaces respectively. This helps to ensure sound engagement of the connector with the hose end.
  • An annular recess 90 is formed, adjacent the base 76, by a small circular rim 92 which has an axially-extending inner surface 94 and a tapered outer surface 96.
  • Figures 5 to 8 illustrate successive stages of engagement of the connector 50 with the end of the hose 10.
  • Figure 5 the terminal portion 78 is located in a mouth of the void 18 and the outer hose portion 32 is slightly displaced radially outwardly with respect to the inner hose portion 30.
  • Figures 6 to 8 show that the degree of outward deformation of the outer portion increases as the tubular shell 52 extends further into the void 18.
  • the annular recess 90 decreases in width towards the flange.
  • the leading end of the inner body portion 32 is able to enter the annular recess with relative ease.
  • the connector is pushed home onto the end of the hose and the tubular shell 52 extends to a maximum extent into the void, the leading end of the inner body portion is compressed as it enters fully into the annular recess, as is shown in Figure 8.
  • the serrated, keying formations 84 on the connector are angled to allow easy insertion of the tubular shell 52 into the void 18.
  • Figures 9 and 10 are views, partly sectioned, of a peristaltic pump 62.
  • the hose 10 can be used with most types of peristaltic pumps and the nature of the pump does not limit the scope of the invention. The following brief description is thus made primarily to achieve an understanding of the manner in which the hose is fixed to a pump.
  • the pump 62 includes a casing 80 in which is formed a chamber 82.
  • a structure 84 is mounted to the casing for rotation about an axis 86.
  • a wheel 88 is mounted to the structure and is rotatable about an axis 90 which is displaced radially from the axis 86.
  • the structure and the wheel are rotated by means of a suitable prime mover, for example an electric motor, not shown.
  • the hose 10 is disposed inside the chamber to extend, with a single helical winding adjacent a reaction surface 92, from an inlet port 94 to an outlet port 96.
  • Each hose end is attached in the same way to the pump casing. One end is positioned at the inlet port and the opposing end is secured to the outlet port.
  • the outlet port 96 is formed with a frusto-conical inner wall 100 which is of complementary shape to the displaced and deformed outer tubular body portion 32 once the connector 50 has been fully inserted into the void.
  • Bolts 102 are passed through the holes 56A and are threadedly engaged with threaded passages 104 in the pump casing. As the bolts are tightened the elastomeric, tubular outer body portion 32 is progressively compressed between the outer surface 82 of the tubular shell and the opposing frusto-conical inner wall 100 of the outlet port.
  • the keying formations 84 on the outer surface are urged into tight gripping engagement with the outer body portion.
  • the arrangement of the reinforcing stands is such that in all portions of the body away from the zone 24 the strands are helically deployed and provide their full and designed reinforcement.
  • the strands 16B extend longitudinally, in the outer body portion which is externally supported by the frusto-conical inner wall of the port.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne un tuyau de pompe péristaltique qui comporte un corps résilient présentant un vide axial à une extrémité, des filaments de renforcement hélicodaux se trouvant dans le corps sur un côté interne du vide, et des filaments de renforcement s'étendant longitudinalement dans le corps sur un côté externe du vide.
PCT/ZA2008/000058 2007-07-04 2008-07-04 Tuyau de pompe péristaltique WO2009006649A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200705585 2007-07-04
ZA2007/05585 2007-07-04

Publications (1)

Publication Number Publication Date
WO2009006649A1 true WO2009006649A1 (fr) 2009-01-08

Family

ID=40001501

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/ZA2008/000058 WO2009006649A1 (fr) 2007-07-04 2008-07-04 Tuyau de pompe péristaltique
PCT/ZA2008/000057 WO2009006648A1 (fr) 2007-07-04 2008-07-04 Pompe péristaltique

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/ZA2008/000057 WO2009006648A1 (fr) 2007-07-04 2008-07-04 Pompe péristaltique

Country Status (2)

Country Link
WO (2) WO2009006649A1 (fr)
ZA (1) ZA201000796B (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US320888A (en) * 1885-06-23 Pieeee julien euffel
US3875970A (en) * 1971-03-25 1975-04-08 Manostat Corp Tubing
US3974862A (en) * 1974-05-15 1976-08-17 Kabel-Und Metallwerke Gutehoffnungshutte Aktiengesellschaft Flexible conduit
GB2012373A (en) * 1978-01-11 1979-07-25 Medical Sciences Int Peristaltic infusion pump and disposable casette for use therewith
GB2084287A (en) * 1980-09-25 1982-04-07 Delasco Sa Hoses for peristaltic pumps
US5049048A (en) * 1988-08-12 1991-09-17 KWW Gesellschaft fur Verfahrenstechnik mbH Hose pump
EP0889237A2 (fr) * 1997-07-01 1999-01-07 Daiichi Techno Co Ltd Tube flexible pour pompe péristaltique
US6607010B1 (en) * 2001-05-10 2003-08-19 Southeastern Universities Res. Assn, Inc. Flexible collapse-resistant and length-stable vaccum hose

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3180272A (en) * 1963-07-09 1965-04-27 Roger L Culbertson Deformable-hose fluid pump
GB1485205A (en) * 1974-05-29 1977-09-08 Galea J Peristaltic pump
SU896253A1 (ru) * 1979-10-08 1982-01-07 Проектно-конструкторское бюро по проектированию оборудования для производства пластических масс и синтетических смол Перистальтический насос
SU1040215A1 (ru) * 1982-04-20 1983-09-07 Rudikov Vasilij S Перистальтическа гидромашина
DE3320091A1 (de) * 1983-06-03 1984-12-06 Streicher, Irmgard, 7141 Beilstein Schlauchpumpe
WO1997041353A1 (fr) * 1996-04-26 1997-11-06 Pumping Systems Technologies Pty. Limited Pompe peristaltique orbitale a tube dynamique

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US320888A (en) * 1885-06-23 Pieeee julien euffel
US3875970A (en) * 1971-03-25 1975-04-08 Manostat Corp Tubing
US3974862A (en) * 1974-05-15 1976-08-17 Kabel-Und Metallwerke Gutehoffnungshutte Aktiengesellschaft Flexible conduit
GB2012373A (en) * 1978-01-11 1979-07-25 Medical Sciences Int Peristaltic infusion pump and disposable casette for use therewith
GB2084287A (en) * 1980-09-25 1982-04-07 Delasco Sa Hoses for peristaltic pumps
US5049048A (en) * 1988-08-12 1991-09-17 KWW Gesellschaft fur Verfahrenstechnik mbH Hose pump
EP0889237A2 (fr) * 1997-07-01 1999-01-07 Daiichi Techno Co Ltd Tube flexible pour pompe péristaltique
US6607010B1 (en) * 2001-05-10 2003-08-19 Southeastern Universities Res. Assn, Inc. Flexible collapse-resistant and length-stable vaccum hose

Also Published As

Publication number Publication date
WO2009006648A1 (fr) 2009-01-08
ZA201000796B (en) 2010-10-27

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