WO2004105926A1 - Metering apparatus - Google Patents
Metering apparatus Download PDFInfo
- Publication number
- WO2004105926A1 WO2004105926A1 PCT/IT2003/000341 IT0300341W WO2004105926A1 WO 2004105926 A1 WO2004105926 A1 WO 2004105926A1 IT 0300341 W IT0300341 W IT 0300341W WO 2004105926 A1 WO2004105926 A1 WO 2004105926A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pump
- plunger
- plate
- hole
- distal end
- 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.)
- Ceased
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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/84—Mixing plants with mixing receptacles receiving material dispensed from several component receptacles, e.g. paint tins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
- B01F35/882—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances
- B01F35/8822—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise using measuring chambers, e.g. volumetric pumps, for feeding the substances using measuring chambers of the piston or plunger 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
- 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
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
- F04B53/147—Mounting or detaching of piston rod
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
- G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
- G01F11/021—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the piston type
Definitions
- the present invention relates to apparatus for metering at least two different fluid components for use, for example, in the production of two-component resin compounds from main base components and additive components.
- the object of the present invention is to provide a more versatile metering apparatus than those of the prior art and which, in particular, makes it possible to change the components to be metered following a quick and simple reconfiguration operation.
- Figure 1 is a schematic front elevation view of apparatus according to the invention
- Figure 2 is a plan view of the apparatus of Figure 1;
- FIG 3 is a perspective view of a detail of the apparatus of the invention of Figure 1,
- FIG 4 is a perspective view of another detail of the apparatus of the invention of Figure 1, and
- Figure 5 is a section view taken on the line V-V of Figure 3.
- Apparatus for metering a plurality of different fluid components includes (see Figures 1 and 2) a fixed frame 10 and a plurality of plunger pumps 12, each of which is operable to deliver a metered quantity of a single component.
- the frame 10 includes a fixed lower plate 14 and a fixed upper plate 16 which is substantially rectangular and four columns 18 which interconnect respective facing corner portions of the plates 14, 16.
- each pump 12 includes a body 20 with the plunger 22 of the pump protruding therefrom and associated intake and delivery pipes .
- Each pump 12 is housed in a respective seat 24 formed in the upper plate 16 of the frame 10 and having (Fig. 4) a removable wall 26 for enabling the body 20 of the pump 12 to be fitted and removed.
- This removable side 26 has end holes 28 through which a respective screw 30 can pass in order to fix the remaining parts of the seat 24.
- Each plunger 22 (see Figures 3 and 5) has a portion 32 at its distal end with a circular section greater than the circular section of the proximal portion 34. In addition it has an intermediate portion 36 with an intermediate section, between that of the distal portion 32 and the proximal portion 34 and having two flat facetings 38 formed in diametrically opposite positions.
- the distal end portion 32 of each plunger 22 includes a separate cylindrical element 40, with a through- hole 42 at the site of its longitudinal axis for the passage of a screw 44 which engages a threaded hole 46 formed in the remaining portion 48 of the distal end portion 32, which is formed in one piece with the intermediate portion 36 and the proximal portion 34.
- the apparatus also includes (see Figure 1) a movable plate 50 which is substantially rectangular and has at each corner portion an associated bush 52 mounted on a respective upright 18.
- An actuator assembly 54 is associated with the plate 50 in order to transmit to it a reciprocating movement along a path parallel to the axis of the columns 18.
- the movable plate 50 also has means (see Figures 3 and 5) for enabling it to be connected selectively to the distal end of each plunger 22.
- these selective connection means include a locking member 56 fixed to the face of the plate facing the body 20 of the pump 12 about a through-hole 58 formed through the plate 50 and having dimensions corresponding to those of the distal end portion 32 of the plunger 22.
- each locking member 56 has a cavity 60 opening outwardly, extending for the entire height of the member 56 and having a first, lower portion 62 the width of which corresponds to the diameter of the hole 58 through the plate 50 and a second, upper portion 64, the width of which is between the length of the diameter of the proximal portion 34 and that of the diameter of the distal end portion 32 of the plunger 22.
- Each locking member 56 also has a plurality of through-holes 66, through each of which a respective screw 68 can pass in order to engage a threaded hole 70 formed in the surface of the plate 50 facing the bodies 20 of the pumps 12.
- the means for selectively connecting the distal end of each plunger 22 to the plate 50 each also include a member for selectively closing the respective through-hole 58.
- This member is constituted by a rod 72 with through holes 74 at each end for a respective screw 76 to pass through and engage a threaded hole 78 formed in the surface of the plate 50 facing away from the bodies 20 of the pumps 12.
- each pump 12 delivers a measured quantity of one of the components of the compound which is being produced.
- these components would typically include two base components which are always the same - that is polyol and iso-cyanate - along with additive components, such as colourings and perfumes, for example, which vary from one specific resin to another.
- each pump 12 is allotted to delivering one of either the basic components or the additives, taking care to activate only those pumps 12 which are delivering either a basic component or an additive which is specifically necessary for the compound which is being manufactured in that instance .
- the rods 72 associated with the plungers 22 of the pumps 12 containing additives which are not required for the compound being manufactured are arranged, on the other hand, so they do not block their respective through-hole 58. This position is achieved by completely unscrewing one of the screws 76 and rotating the rod 72 relative to the other screw 76. The plunger 22 is thereby released from the plate 50 and remains stationary during reciprocating motion of this latter, thereby not transmitting any movement to the pump 12 (see pump on the left in Figure 3) .
- each pump 12 is therefore selectively releasable from the frame 10 and from the movable plate 50, thereby constituting a modular unit which is interchangeable with another pump 12 ready to deliver a different component.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The apparatus is operable to deliver metered quantities of two different fluid components. It includes: a fixed support frame (10); a plunger pump (12) for the metered delivery of each individual component, each pump (12) having a body (20) housed on the support frame (10) with the plunger shaft (22) protruding therefrom; a plate (50) with an actuator member (54) operable to impart a reciprocating movement; and means for enabling the movable plate (50) to be connected selectively to the distal end of each plunger (22), in such a way that it is possible to select which pumps (12) are operated. It is preferable if each pump (12) is selectively releasable from the frame (10) and the movable plate (50), thereby constituting a modular unit which is interchangeable with another pump (12).
Description
Metering apparatus
The present invention relates to apparatus for metering at least two different fluid components for use, for example, in the production of two-component resin compounds from main base components and additive components.
Metering apparatus is known which includes a separate pump for each individual component . These prior art systems have a fixed configuration so that, even if the nature of the components of the compound needs to be varied only slightly, the entire apparatus must be reconfigured. This becomes even more important in the event of significant changes to the nature of the components to be metered.
The object of the present invention is to provide a more versatile metering apparatus than those of the prior art and which, in particular, makes it possible to change the components to be metered following a quick and simple reconfiguration operation.
This object is achieved according to the invention by providing apparatus having the characteristics claimed specifically in the following Claim 1. Preferential embodiments of the apparatus of the invention form the su ject of dependent claims .
Additional characteristics and advantages of the present invention will become apparent from the detailed description which follows, provided by way of non-limitative example with reference to the appended drawings, in which:
Figure 1 is a schematic front elevation view of apparatus according to the invention,
Figure 2 is a plan view of the apparatus of Figure 1;
Figure 3 is a perspective view of a detail of the apparatus of the invention of Figure 1,
Figure 4 is a perspective view of another detail of the apparatus of the invention of Figure 1, and
Figure 5 is a section view taken on the line V-V of Figure 3.
Apparatus for metering a plurality of different fluid components includes (see Figures 1 and 2) a fixed frame 10 and a plurality of plunger pumps 12, each of which is operable to deliver a metered quantity of a single component. The frame 10 includes a fixed lower plate 14 and a fixed upper plate 16 which is substantially rectangular and four columns 18 which interconnect respective facing corner portions of the plates 14, 16.
In a manner which is known per se, each pump 12 includes a body 20 with the plunger 22 of the pump protruding therefrom and associated intake and delivery pipes . Each pump 12 is housed in a respective seat 24 formed in the upper plate 16 of the frame 10 and having (Fig. 4) a removable wall 26 for enabling the body 20 of the pump 12 to be fitted and removed. This removable side 26 has end holes 28 through which a respective screw 30 can pass in order to fix the remaining parts of the seat 24.
Each plunger 22 (see Figures 3 and 5) has a portion 32 at its distal end with a circular section greater than the circular section of the proximal portion 34. In addition it has an intermediate portion 36 with an intermediate section, between that of the distal portion 32 and the proximal portion 34 and having two flat facetings 38 formed in diametrically opposite
positions. The distal end portion 32 of each plunger 22 includes a separate cylindrical element 40, with a through- hole 42 at the site of its longitudinal axis for the passage of a screw 44 which engages a threaded hole 46 formed in the remaining portion 48 of the distal end portion 32, which is formed in one piece with the intermediate portion 36 and the proximal portion 34.
The apparatus also includes (see Figure 1) a movable plate 50 which is substantially rectangular and has at each corner portion an associated bush 52 mounted on a respective upright 18. An actuator assembly 54 is associated with the plate 50 in order to transmit to it a reciprocating movement along a path parallel to the axis of the columns 18.
The movable plate 50 also has means (see Figures 3 and 5) for enabling it to be connected selectively to the distal end of each plunger 22. For each plunger 22, these selective connection means include a locking member 56 fixed to the face of the plate facing the body 20 of the pump 12 about a through-hole 58 formed through the plate 50 and having dimensions corresponding to those of the distal end portion 32 of the plunger 22.
In its central portion, each locking member 56 has a cavity 60 opening outwardly, extending for the entire height of the member 56 and having a first, lower portion 62 the width of which corresponds to the diameter of the hole 58 through the plate 50 and a second, upper portion 64, the width of which is between the length of the diameter of the proximal portion 34 and that of the diameter of the distal end portion 32 of the plunger 22.
Each locking member 56 also has a plurality of through-holes 66, through each of which a respective screw 68 can pass in order to engage a threaded hole 70 formed in the surface of the plate 50 facing the bodies 20 of the pumps 12.
The means for selectively connecting the distal end of each plunger 22 to the plate 50 each also include a member for selectively closing the respective through-hole 58. This member is constituted by a rod 72 with through holes 74 at each end for a respective screw 76 to pass through and engage a threaded hole 78 formed in the surface of the plate 50 facing away from the bodies 20 of the pumps 12.
During operation of the metering apparatus, each pump 12 delivers a measured quantity of one of the components of the compound which is being produced. With reference to the compounds which are required in order to manufacture certain polyurethane resins, these components would typically include two base components which are always the same - that is polyol and iso-cyanate - along with additive components, such as colourings and perfumes, for example, which vary from one specific resin to another.
In such cases, each pump 12 is allotted to delivering one of either the basic components or the additives, taking care to activate only those pumps 12 which are delivering either a basic component or an additive which is specifically necessary for the compound which is being manufactured in that instance .
This is done simply by arranging the rods 72 associated with the pumps 12 to be activated in the position in which they each close a respective through-hole 58, by tightening each
of the screws 76 in the holes 78 and ensuring that the locking members 56 remain tight about the distal ends of the plungers 22 of the associated pumps 12. In this way, the cylindrical element 40 of the distal end portion 32 of each plunger 22 - which is firmly secured to the remaining portion 48 of this latter by the screw 44 engaged in the hole 46 - is held in the though-hole 58 by the rod 72 beneath it, while the remaining portion 48 of the distal end portion 32 is blocked at the top by engagement against a horizontal shoulder 80 interposed between the two differently dimensioned portions 62, 64 of the cavity 60. In this way, the plungers 22 are securely locked to the plate 50 and follow the reciprocating motion thereof, thereby causing the body 20 of the respective pump 12 to deliver a metered quantity of the fluid component contained therein (see pump on the right in Figure 3) .
The rods 72 associated with the plungers 22 of the pumps 12 containing additives which are not required for the compound being manufactured are arranged, on the other hand, so they do not block their respective through-hole 58. This position is achieved by completely unscrewing one of the screws 76 and rotating the rod 72 relative to the other screw 76. The plunger 22 is thereby released from the plate 50 and remains stationary during reciprocating motion of this latter, thereby not transmitting any movement to the pump 12 (see pump on the left in Figure 3) .
It is therefore possible, simply by positioning the rods 72 associated with the various pumps 12 so that they either close or do not close their respective through-hole 58, to select at will which pumps are operated at any particular
time and thus to manufacture compounds requiring different components.
However, since the number of pumps 12 that can be housed in the seats 24 formed in the frame 10 is of course limited, it is possible that certain compounds will require additives not contained in the pumps 12 arranged in the frame 10. In this event, one need only replace a pump containing an additive not required for the compound to be produced with another pump 12 ready to deliver the additive which needs to be included.
This is done by first unscrewing (see Figure 4) the screws 30 in order to be able to release the side 26 from the remaining parts of the seat 24 of the respective pump 12. It is thus possible to remove the body 20. In order to release the distal portion of the plunger 22 as well, it is necessary to unscrew the screw 44, thereby disengaging the cylindrical element 40 from the remaining portion 48 of the distal end portion 32 of the plunger 22, and to loosen slightly the screws 68 fixing the locking member 56 to the plate 50. These operations are made easier by the presence of the flat facetings 38 on the intermediate-diameter portion 36 of the plunger 22, since they make it possible to lock this latter against rotation with a spanner or other similar tool. The free cylindrical element 40 can thus be removed through the bottom of the through-hole 58, while the body 20 of the pump 12 and the remaining portion of the plunger 22 can be removed through the front of the apparatus. Another pump 12 of the same structure as the one removed can then be fitted and prepared in the frame 10 to deliver the required additive by reversing the operations described above .
In sum, each pump 12 is therefore selectively releasable from the frame 10 and from the movable plate 50, thereby constituting a modular unit which is interchangeable with another pump 12 ready to deliver a different component.
Naturally, the principle of the invention remaining unchanged, manufacturing details and embodiments can vary widely from those described purely by way of non-limitative example, without departing thereby from the scope of the invention.
Claims
1. Metering apparatus for delivering at least two different fluid components, including: a fixed support frame (10) , a plunger pump (12) for delivering a metered quantity of each individual component, each pump (12) having a body (20) housed in the said support frame (10) with the plunger (22) shaft protruding therefrom, a plate (50) with an actuator member (54) operable to impart reciprocating motion, and means enabling the said movable plate (50) to be fixed selectively to the distal end of each plunger (22) , thereby making it possible to choose which pumps (12) are to be operated.
2. Apparatus according to Claim 1 , in which each pump (12) can be released selectively from the said frame (10) and from the said movable plate (50) , so that it constitutes a modular unit interchangeable with another pump (12) .
3. Apparatus according to any preceding Claim, in which the circular cross section of the distal end portion (32) of each plunger (22) is greater than the circular cross section of its proximal end portion (34) and corresponds to that of a circular through-hole (58) formed through the plate (50) , a respective locking member (56) being fixed around the said hole (58) on the surface of the plate facing the body (20) of the pump (12) , with an outwardly opening cavity (60) extending along the entire height of the member (56) and having a first, lower , portion (62) the width of which corresponds to the diameter of the hole (58) through the plate (50) and a second, upper portion (64) the width of which is between the diameter of the proximal portion (36) and that of the distal portion (32) of the plunger (22) , a member for selectively closing the hole (58) being mounted on the surface of the plate (50) facing away from the body (20) of the pump (12) .
4. Apparatus according to Claim 3 , in which the said plunger (22) has a portion (36) with a circular section which is intermediate between that of the distal end portion (32) and that of the proximal portion (34) and has two flat facetings (38) located in diametrically opposite positions.
5. Apparatus according to Claims 3 or 4 , in which each locking member (56) has a plurality of through-holes (66) for a respective screw (68) to pass through and engage a threaded hole (70) formed in the surface of the plate (50) facing the body (20) of the pump (12) .
6. Apparatus according to any preceding claim 3 to 5 , in which the distal end portion (32) of each plunger (22) includes a separate cylindrical element (40) having a through-hole (42) coincident with its longitudinal axis for a screw (44) to pass through and engage a threaded hole (46) formed in the remaining portion (48) of the distal end portion (32) , which is formed in one piece with the intermediate portion (36) and the proximal portion (34) of the plunger (22) .
7. Apparatus according to any of Claims 3 to 6, in which the said member for selectively closing the hole is constituted by a rod (72) with a through-hole (74) at each end for the passage of a respective screw (76) which engages a threaded hole (78) formed in the surface of the plate (50) facing away from the body (20) of the pump (12) .
8. Apparatus according to any preceding Claim, in which the said frame (10) has a seat (24) for the body (20) of each pump (12) , each seat (24) having a removable side (26) for enabling the pump (12) to be inserted or removed.
9. Apparatus according to Claim 8, in which the said removable side (26) has holes (28) at each end for the passage of a respective screw (30) for securing it to the other parts of the seat (24) .
10. Apparatus according to any preceding Claim, including a plurality of plunger pumps (12) for delivering metered quantities of a corresponding number of different fluid components .
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2003238689A AU2003238689A1 (en) | 2003-05-30 | 2003-05-30 | Metering apparatus |
| PCT/IT2003/000341 WO2004105926A1 (en) | 2003-05-30 | 2003-05-30 | Metering apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IT2003/000341 WO2004105926A1 (en) | 2003-05-30 | 2003-05-30 | Metering apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004105926A1 true WO2004105926A1 (en) | 2004-12-09 |
Family
ID=33485486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IT2003/000341 Ceased WO2004105926A1 (en) | 2003-05-30 | 2003-05-30 | Metering apparatus |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU2003238689A1 (en) |
| WO (1) | WO2004105926A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007039378A1 (en) | 2005-10-05 | 2007-04-12 | Kraussmaffei Technologies Gmbh | Device for dosing loading material in a polyurethane plant |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4693397A (en) * | 1983-07-29 | 1987-09-15 | Ludwig Schwerdtel Gmbh | Dosing devices for viscous materials particularly highly viscous materials |
| US5305917A (en) * | 1992-11-19 | 1994-04-26 | Fluid Management Limited Partnership | Simultaneous dispensing apparatus |
| US5407100A (en) * | 1994-01-07 | 1995-04-18 | Fluid Management Limited Partnership | Dispensing apparatus with a moveable plate |
-
2003
- 2003-05-30 AU AU2003238689A patent/AU2003238689A1/en not_active Abandoned
- 2003-05-30 WO PCT/IT2003/000341 patent/WO2004105926A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4693397A (en) * | 1983-07-29 | 1987-09-15 | Ludwig Schwerdtel Gmbh | Dosing devices for viscous materials particularly highly viscous materials |
| US5305917A (en) * | 1992-11-19 | 1994-04-26 | Fluid Management Limited Partnership | Simultaneous dispensing apparatus |
| US5407100A (en) * | 1994-01-07 | 1995-04-18 | Fluid Management Limited Partnership | Dispensing apparatus with a moveable plate |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007039378A1 (en) | 2005-10-05 | 2007-04-12 | Kraussmaffei Technologies Gmbh | Device for dosing loading material in a polyurethane plant |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003238689A1 (en) | 2005-01-21 |
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