EP0931934A1 - Dispositif de pompage des matériaux visqueux - Google Patents

Dispositif de pompage des matériaux visqueux Download PDF

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Publication number
EP0931934A1
EP0931934A1 EP99810063A EP99810063A EP0931934A1 EP 0931934 A1 EP0931934 A1 EP 0931934A1 EP 99810063 A EP99810063 A EP 99810063A EP 99810063 A EP99810063 A EP 99810063A EP 0931934 A1 EP0931934 A1 EP 0931934A1
Authority
EP
European Patent Office
Prior art keywords
piston
hydraulic fluid
pump
space section
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99810063A
Other languages
German (de)
English (en)
Inventor
Peter Suter
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.)
Dosiertechnik und Pneumatik AG Dopag
Original Assignee
Dosiertechnik und Pneumatik AG Dopag
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 Dosiertechnik und Pneumatik AG Dopag filed Critical Dosiertechnik und Pneumatik AG Dopag
Publication of EP0931934A1 publication Critical patent/EP0931934A1/fr
Withdrawn legal-status Critical Current

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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
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
    • 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
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/06—Combinations of two or more pumps the pumps being all of reciprocating positive-displacement type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/123—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber
    • F04B9/127—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting elastic-fluid motor, e.g. actuated in the other direction by gravity or a spring

Definitions

  • the invention relates to a device for pumping flowable materials, namely a pump device for Production of an essentially containing two components flowable, for example pasty and / or highly viscous Product.
  • the product can also be a liquid be, with all intermediate states between pasty and liquid possible are.
  • the invention further relates to the use such a device for the production of highly viscous Silicone products.
  • Silicone products consist of two in the same volume ratio components mixed together homogeneously. It is known to produce such silicone products Pump devices used, which two hydraulically driven piston pumps with identical dimensions own, one on each of the two flowable Components act pumping.
  • the hydraulic piston pumps each have one slidable in a cylinder Piston, one delimited by piston and cylinder and one Part of the space containing hydraulic fluid Piston pump communicating with the same hydraulic fluid containing space section of the other piston pump is connected that the first hydraulic drive Pump the pump from the specified space section of this pump displaced and into the cylindrical chamber of the second pump directed hydraulic fluid this second pump accordingly the movement of the first piston, i.e. with the Pumping power of the first pump drives.
  • the invention is based on the object of a device for pumping flowable materials, which are used to produce an essentially two component containing, flowable product are determined.
  • the device is said to have the disadvantages of the known and do not have pump devices serving the same purpose and in particular enable two flowable components of a product optimally and during a longer one, for example operating time lasting several hours in constant persistent, preferably the same volume ratio to mix with each other so that the continuously manufactured Product has a constant homogeneous composition having.
  • the device for the production of Silicone products consisting of two in equal amounts with each other mixed components can be used.
  • a characteristic feature of the pump according to the invention is the pneumatic drive of two coupled ones Piston pumps.
  • This pump according to the invention thus has a contrast essential maintenance advantages for the hydraulic pump devices.
  • the one shown in FIG. 1 and designated 1 as a whole Pump device has two drive cylinders 2 and 3 each with a cylindrical chamber 4 or 5.
  • a piston 6 and 7 is also each slidably held.
  • the Pistons 6 and 7 the chambers 4 and 5 in two room sections 8a / 8b or 9a / 9b.
  • the pumping device 1 is vertical in the case shown aligned and effective - as explained in more detail below is - via the piston rods 6a and 7a pumping to below the drive cylinders 2 and 3 arranged liquid storage one, which in turn is the components to be mixed of a product that can be produced by means of the device 1 contain.
  • space sections mentioned one each, namely the lower space section 8b of the drive cylinder 2 and the upper space section 9a of the drive cylinder 3 with a hydraulic fluid 10 known kind of filled.
  • these are two room sections 8b and 9a via a communicating pipe connection 11 with one another connected, this one hand in the floor area of the room section 8b and on the other hand in the ceiling area the space section 9a opens and also with the above Hydraulic fluid 10 is filled, so that each from the outside generated movement of a piston a corresponding movement of the other piston.
  • the two drive cylinders 2 and 3 um pneumatically driven pumps what for in particular the drive cylinder 2 on its top and the drive cylinder 3 on its underside, each with a hydraulic fluid-free Space section 8a and 9b provided are.
  • the two cylinders 2 and 3 on their lower and / or Top also possess sensor means that the arrival register piston 6 or 7 at the end of each chamber and the subsequent change of direction of the piston movement trigger.
  • sensor means are shown in FIG. 1 and designated 12 and 13. It is for example around electronic sensors, such as inductive initiators, with associated electrical control lines 14 and 15.
  • the two pistons 6 and 7 of the device 1 move with the pressure applied downwards at the same speed and above. They therefore generate the same pumping power and can therefore be used in conjunction with two similar devices for pumping liquid material equal amounts of liquid promote.
  • Essential control element for the movement of the pistons 6 and 7 is the pressure directional control valve. Such is in the figure 1 shown symbolically and marked with 16. In the Drawing the compressed air circuit is switched so that the space section 8a of the drive cylinder 2 with the Pressure source 17 is connected, so the device 1 in through the arrows 18 marked operating state with down moving pistons 6 and 7 is drawn.
  • FIG. 2 shows a mixing plant 20, which according to the Invention for the production of a two-component flowable, for example pasty and / or highly viscous Product.
  • This system has two side by side arranged and vertically displaceable pump lifters 21 and 22 with drive cylinders 2 and 3 arranged thereon according to FIG Figure 1.
  • the latter With their piston rods 6a and 7a each on a metering pump 23 or 24 connected, each for pumping a liquid are determined, which in turn are in a reservoir 25 or 26 are present.
  • 23 and 24 are used to discharge the pumped liquids serving lines 27 and 28 merged. These lead to into the mixing chamber of a not shown mixing and Dosing system, which is also a known design.
  • the pumping device 1 has additional measuring and Control means to keep the two pistons 6 and 7 synchronized for a long time, for example for several hours continuous operation to control.
  • a compensating pump 30 and A relief valve 31 is arranged at the upper end of the chamber 5. These serve to ensure that the pistons 6 run unevenly and 7 either an excess of hydraulic fluid 10 to withdraw from the space section 9a or in the event of a lack of Hydraulic fluid 10 in space section 8b, hydraulic fluid 10 by means of the compensating pump 30 in the space section 8b feed.
  • hydraulic control is the uneven running of the two pistons 6 and 7 of the above Sensor means or other measuring means detected and from a control system described in more detail below registered and corrected, for which the latter in particular Compensating pump 30 or the compensating valve 31 controls.
  • Tank 32 for temporary storage of withdrawn from chamber 5 Hydraulic fluid 10 and a controllable and on this Pressure regulating valve 33 acting on the tank.
  • the pressure directional control valve 16 as well as the sensor means mentioned 12 and 13 and the components of the hydraulic control system are on a central control system, not shown connected.
  • This control system has control means to the measured by the sensor means if necessary Register signals and the above operation explained depending on these signals or the ones determined from them Control measured values.
  • the control system can do this Example analog computing amplifier, comparison circuits and the like and / or an analog-to-digital converter for converting the measurement signals into digital signals and have a digital computer.
  • manually operated controls such as Push button switches and the like are available with which for example the pumping power of the two drive cylinders 2 and 3 can be regulated manually.
  • the central control system can also be analog and / or digital, for displaying operating states and the like serving, display means. They can do this be trained to the determined measured values and the Display process progress continuously during operation.
  • the control system is so designed that the Sequence of the above-described method for simultaneous Pumping two liquids optionally by manual Operating controls at least partially by one person or completely automatically by the control system can be controlled. But it is planned to large-scale production of products from two flowable Components, the pumping process described above to control the process automatically as long as possible only temporarily "manually" controlled by one person.
  • a silicone product should be made up of two components with said sensor means 12 and 13 or others the movements are regularly used for the same purpose or positions of the two pistons 6 and 7 measured, recorded and compared with each other.
  • the central control system either the balance pump 30 or the relief valve 32 so driven that because of the above hydraulic regulation of the desired piston synchronism resumes.
  • this is usually the case from that the synchronism of the two cylinders 2 and 3 at upper or lower switching point, i.e. when changing direction of the piston run, by the compensating pump 30 or the relief valve 31 is set again.
  • Compensating pump 30 and relief valve 31 are in this embodiment mechanically controllable, and in such a way that with an unequal Run pistons 6 and 7 either in excess Hydraulic fluid 10 via the relief valve 31 from the pulled a drive cylinder or if there is a lack of hydraulic fluid 10, such by means of the compensating pump 30 is fed into the other drive cylinder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
EP99810063A 1998-01-27 1999-01-26 Dispositif de pompage des matériaux visqueux Withdrawn EP0931934A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH19298 1998-01-27
CH19298 1998-01-27

Publications (1)

Publication Number Publication Date
EP0931934A1 true EP0931934A1 (fr) 1999-07-28

Family

ID=4181356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99810063A Withdrawn EP0931934A1 (fr) 1998-01-27 1999-01-26 Dispositif de pompage des matériaux visqueux

Country Status (1)

Country Link
EP (1) EP0931934A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065230A (en) * 1975-01-17 1977-12-27 Hart Associates, Inc. Reciprocating infusion pump and directional adapter set for use therewith
EP0167635A1 (fr) * 1984-06-05 1986-01-15 COMPAGNIA ITALIANA FORME ACCIAIO S.p.A. Circuit hydraulique pour le contrôle de pompes à piston alternatif
DE19611339A1 (de) * 1996-03-22 1997-09-25 Wagner Wilhelm Wiwa Verfahren zum Fördern von Werkstoffen und Vorrichtung zur Durchführung des Verfahrens

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4065230A (en) * 1975-01-17 1977-12-27 Hart Associates, Inc. Reciprocating infusion pump and directional adapter set for use therewith
EP0167635A1 (fr) * 1984-06-05 1986-01-15 COMPAGNIA ITALIANA FORME ACCIAIO S.p.A. Circuit hydraulique pour le contrôle de pompes à piston alternatif
DE19611339A1 (de) * 1996-03-22 1997-09-25 Wagner Wilhelm Wiwa Verfahren zum Fördern von Werkstoffen und Vorrichtung zur Durchführung des Verfahrens

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