EP3735535B1 - Volumetric dosing pump and dosing system comprising at least one of such pumps - Google Patents

Volumetric dosing pump and dosing system comprising at least one of such pumps Download PDF

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Publication number
EP3735535B1
EP3735535B1 EP18842665.4A EP18842665A EP3735535B1 EP 3735535 B1 EP3735535 B1 EP 3735535B1 EP 18842665 A EP18842665 A EP 18842665A EP 3735535 B1 EP3735535 B1 EP 3735535B1
Authority
EP
European Patent Office
Prior art keywords
stator
product
dosing
duct
coating layer
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.)
Active
Application number
EP18842665.4A
Other languages
German (de)
French (fr)
Other versions
EP3735535A1 (en
Inventor
Alessandro Sacchet
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.)
Hero Europe SRL
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Hero Europe SRL
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Filing date
Publication date
Application filed by Hero Europe SRL filed Critical Hero Europe SRL
Publication of EP3735535A1 publication Critical patent/EP3735535A1/en
Application granted granted Critical
Publication of EP3735535B1 publication Critical patent/EP3735535B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C13/00—Adaptations of machines or pumps for special use, e.g. for extremely high pressures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/90—Improving properties of machine parts
    • F04C2230/91—Coating

Definitions

  • the present invention refers to a volumetric dosing pump for powdery, liquid, pasty or creamy products, and to a dosing system comprising at least one of such pumps.
  • the invention refers to a pump with progressive recesses for dosing and delivering powdery products or product having high viscosity, such as, for example, glues, mastexes, grease, paints, etc., and to a dosing system comprising at least one of such pumps.
  • the stators of these known pumps with progressive recesses are made of rubber, preferably vulcanized and compression molded.
  • Object of the present invention is solving the above prior art problems by providing a volumetric dosing pump with progressive recesses and a dosing system comprising at least one of such pumps, which allow their use to deliver products containing aggressive solvents, keeping at the same time a reduced pump cost.
  • the volumetric dosing pump 10 in particular for delivering and dosing powdery, liquid, pasty or creamy products, comprises a first duct 5 for entering the product to be dosed, a second duct 9 for exiting such dosed product, an internal recess 12 connected to the first duct 5 for entering the product to be dosed and at least one pumping element with progressive recesses 7, which doses such product, operatively connected to motor means, composed for example of an electric driving motor (not shown in the Figures), and fluid connected to the internal recess 12 and to the second duct 9 for exiting such dosed product.
  • motor means composed for example of an electric driving motor (not shown in the Figures)
  • the pumping element with progressive recesses 7 comprises an external stator case 14 and an internal rotor 15 driven in rotation by the motor means, such internal rotor 15 being shaped as a worm screw with progressive recesses whose relative rotation with respect to the stator 14 causes a translation movement of the product therein.
  • the pump 10 with progressive recesses is actuated by the motor means, during the rotation movement of its internal rotor 15, it transfers certain amounts of product from the first duct 5 for sucking such product to be dosed to the second exit duct 9.
  • the stator further comprises an internal surface 16 in contact with the rotor 15 which, similarly thereto, is shaped as a worm screw or a coil, said internal surface 16 being coated with a coating layer 18 made of a different material with respect to the material of which the stator 14 is made.
  • the stator 14 is made of rubber, for example thermoplastic rubber, through moulding, and the coating layer 18 is made of polyethylene.
  • stator 14 and the coating layer 18 are made through injection co-moulding of the stator 14 and of the coating layer 18; preferably, the stator 14 and the coating layer 18 are made through co-moulding of rubber and of a layer of polyethylene.
  • the coating layer 18 made of polyethylene allows using the pump with materials containing the most used solvents, without damaging the surface of the stator 14 and with a reduced cost.
  • a dosing/delivering system comprises at least one managing and actuating device, such managing and actuating device comprising motor means, and at least one dosing pump 10 as previously described, operatively connected to such motor means, for example by interposing at least one related rotating shaft.
  • system according to the present invention can further comprise means for supplying and/or storing the product to be dosed and delivered by the dosing pump 10, fluid connected to the first suction duct 5.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Fertilizing (AREA)

Description

  • The present invention refers to a volumetric dosing pump for powdery, liquid, pasty or creamy products, and to a dosing system comprising at least one of such pumps.
  • In particular, the invention refers to a pump with progressive recesses for dosing and delivering powdery products or product having high viscosity, such as, for example, glues, mastexes, grease, paints, etc., and to a dosing system comprising at least one of such pumps.
  • Pumps with progressive recesses used in dosing systems are known and have several advantages: they guarantee a perfect seal when the internal rotor does not move with respect to the external stator, a high reliability with neglectable wear between the internal rotor and the external stator, allow a continuous and extremely accurate delivery of the product, avoiding possible drippings at the outlet duct level.
  • The stators of these known pumps with progressive recesses are made of rubber, preferably vulcanized and compression molded.
  • These pumps with progressive recesses, however, are not satisfactory and have the problem that, due to their chemical nature, the rubbers of which their stators are made have a limited compatibility range with the delivered products, also when there are more aggressive solvents.
  • In order to solve this problem, it is necessary to manufacture stators by using materials whose cost is higher and higher with the increase of the aggression of solvents present in the delivered product, till excessive cost levels are reached which are not aligned with the reference market.
  • Documents US-A1-2010/038142 , WO-A2-2012/024215 and WO-A1-2004/036043 disclose strengthened stators for severe applications according to the prior art.
  • Object of the present invention is solving the above prior art problems by providing a volumetric dosing pump with progressive recesses and a dosing system comprising at least one of such pumps, which allow their use to deliver products containing aggressive solvents, keeping at the same time a reduced pump cost.
  • The above and other objects and advantages of the invention, as will result from the following description, are obtained with a volumetric dosing pump and with a dosing system comprising at least one of such pumps as claimed in the independent claims. Preferred embodiments and non-trivial variations of the present invention are the subject matter of the dependent claims.
  • It is intended that all enclosed claims are an integral part of the present description.
  • It will be immediately obvious that numerous variations and modifications (for example related to shape, sizes, arrangements and parts with equivalent functionality) can be made to what is described, without departing from the scope of the invention as appears from the enclosed claims.
  • The present invention will be better described by some preferred embodiments thereof, provided as a non-limiting example, with reference to the enclosed drawings, in which:
    • Figure 1 shows a side sectional view of a volumetric dosing pump according to the present invention; and
    • Figure 2 shows a side sectional view of a part of a volumetric dosing pump according to the present invention.
  • With reference to the Figures, the volumetric dosing pump 10 according to the present invention, in particular for delivering and dosing powdery, liquid, pasty or creamy products, comprises a first duct 5 for entering the product to be dosed, a second duct 9 for exiting such dosed product, an internal recess 12 connected to the first duct 5 for entering the product to be dosed and at least one pumping element with progressive recesses 7, which doses such product, operatively connected to motor means, composed for example of an electric driving motor (not shown in the Figures), and fluid connected to the internal recess 12 and to the second duct 9 for exiting such dosed product.
  • The pumping element with progressive recesses 7 comprises an external stator case 14 and an internal rotor 15 driven in rotation by the motor means, such internal rotor 15 being shaped as a worm screw with progressive recesses whose relative rotation with respect to the stator 14 causes a translation movement of the product therein. When the pump 10 with progressive recesses is actuated by the motor means, during the rotation movement of its internal rotor 15, it transfers certain amounts of product from the first duct 5 for sucking such product to be dosed to the second exit duct 9.
  • The stator further comprises an internal surface 16 in contact with the rotor 15 which, similarly thereto, is shaped as a worm screw or a coil, said internal surface 16 being coated with a coating layer 18 made of a different material with respect to the material of which the stator 14 is made.
  • The stator 14 is made of rubber, for example thermoplastic rubber, through moulding, and the coating layer 18 is made of polyethylene.
  • The stator 14 and the coating layer 18 are made through injection co-moulding of the stator 14 and of the coating layer 18; preferably, the stator 14 and the coating layer 18 are made through co-moulding of rubber and of a layer of polyethylene.
  • Advantageously, the coating layer 18 made of polyethylene, allows using the pump with materials containing the most used solvents, without damaging the surface of the stator 14 and with a reduced cost.
  • A dosing/delivering system according to the present invention comprises at least one managing and actuating device, such managing and actuating device comprising motor means, and at least one dosing pump 10 as previously described, operatively connected to such motor means, for example by interposing at least one related rotating shaft.
  • Advantageously, the system according to the present invention can further comprise means for supplying and/or storing the product to be dosed and delivered by the dosing pump 10, fluid connected to the first suction duct 5.

Claims (3)

  1. Volumetric dosing pump (10) for delivering and dosing powdery, liquid, pasty or creamy products, namely glues, mastexes, grease, paints, said dosing pump (10) comprising a first duct (5) for entering the product to be dosed, a second duct (9) for exiting such dosed product, an internal recess (12) connected to the first duct (5) for entering the product to be dosed and at least one pumping element with progressive recesses (7), which doses such product, operatively connected to motor means and fluid connected to the internal recess (12) and to the second duct (9) for exiting such dosed product, said pumping element with progressive recesses (7) comprising an external stator case (14) and an internal rotor (15) driven in rotation by the motor means, said internal rotor (15) being shaped as a worm screw with progressive recesses and said stator comprising an internal surface (16) in contact with the rotor (15) and being shaped as worm screw, said internal surface (16) being coated with a coating layer (18) made of a different material with respect to the material of which the stator (14) is made, characterized in that the stator (14) and the coating layer (18) are made through injection co-moulding of the stator (14) and of the coating layer (18), the stator (14) being made of rubber, the coating layer (18) being made of polyethylene.
  2. Volumetric dosing pump (10) according to claim 1, characterized in that the stator (14) is made of thermoplastic rubber.
  3. Dosing/delivering system comprising at least one managing and actuating device, such managing and actuating device comprising motor means and at least one volumetric dosing pump (10) according to any one of the previous claims, operatively connected to such motor means.
EP18842665.4A 2018-01-05 2018-12-21 Volumetric dosing pump and dosing system comprising at least one of such pumps Active EP3735535B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT201800000549A IT201800000549A1 (en) 2018-01-05 2018-01-05 Volumetric metering pump and metering system comprising at least one such pump
PCT/IT2018/000170 WO2019135261A1 (en) 2018-01-05 2018-12-21 Volumetric dosing pump and dosing system comprising at least one of such pumps

Publications (2)

Publication Number Publication Date
EP3735535A1 EP3735535A1 (en) 2020-11-11
EP3735535B1 true EP3735535B1 (en) 2024-07-31

Family

ID=61952794

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18842665.4A Active EP3735535B1 (en) 2018-01-05 2018-12-21 Volumetric dosing pump and dosing system comprising at least one of such pumps

Country Status (7)

Country Link
US (1) US20200370555A1 (en)
EP (1) EP3735535B1 (en)
CN (1) CN111542701A (en)
ES (1) ES2991953T3 (en)
IT (1) IT201800000549A1 (en)
PL (1) PL3735535T3 (en)
WO (1) WO2019135261A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2740725C1 (en) * 2020-04-08 2021-01-20 Общество с ограниченной ответственностью "ПРОИЗВОДСТВЕННАЯ КОМПАНИЯ "МОНОРОТОР" Single-screw microdispenser

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4849201A (en) * 1988-09-02 1989-07-18 The United States Of America As Represented By The Secretary Of The Army Process for preparing chlorinated lime
CN1093607C (en) * 1998-09-25 2002-10-30 振源(厦门)工业有限公司 Method for manufacturing sealed miniature immersible pump
US6220838B1 (en) * 1999-11-03 2001-04-24 Dyno Nobel Inc. Progressive cavity pump with meltable stator
EP1558847A1 (en) * 2002-10-21 2005-08-03 Noetic Engineering Inc. Stator of a moineau-pump
CN1421613A (en) * 2002-12-22 2003-06-04 崔乃林 Screw pump made of polymer material and ceramic and its manufacture
US8197241B2 (en) * 2007-12-18 2012-06-12 Schlumberger Technology Corporation Nanocomposite Moineau device
US20100038142A1 (en) * 2007-12-18 2010-02-18 Halliburton Energy Services, Inc. Apparatus and method for high temperature drilling operations
DE102008039973A1 (en) * 2008-08-27 2010-03-04 Wmf Württembergische Metallwarenfabrik Ag Cavity Pump
US20110308557A1 (en) * 2010-06-16 2011-12-22 Stewart Kaiser Combination Anti-Microbial Drain Pan Float and High Temperature Brine Injected Automated Drain Cleaner
US9309767B2 (en) * 2010-08-16 2016-04-12 National Oilwell Varco, L.P. Reinforced stators and fabrication methods
EP2872563A4 (en) * 2012-07-16 2016-05-25 Polyone Corp Polyethylene compounds having non-migratory slip properties
US9896885B2 (en) * 2015-12-10 2018-02-20 Baker Hughes Incorporated Hydraulic tools including removable coatings, drilling systems, and methods of making and using hydraulic tools

Also Published As

Publication number Publication date
IT201800000549A1 (en) 2018-04-05
WO2019135261A1 (en) 2019-07-11
EP3735535A1 (en) 2020-11-11
PL3735535T3 (en) 2024-12-16
ES2991953T3 (en) 2024-12-05
CN111542701A (en) 2020-08-14
US20200370555A1 (en) 2020-11-26

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