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Title:
IMPROVED MULTI -PUMP DELIVERING DEVICE FOR DYE-METER
Document Type and Number:
WIPO Patent Application WO/2008/062486
Kind Code:
A1
Abstract:
An improved multi-pump delivering device (1) for dye-meter is disclosed, comprising at least two delivering pumps (3), each one of which is connected as inlet (3a) to at least one respective storage tank of a colouring component and as outlet (3b) to at least one delivering head of such dye-meter, in which such delivering pumps (3) are simultaneously actuated through a control kinematism comprising at least one transmission shaft (5) along which at least one primary tapered gear (7) is keyed, coaxial with a rotation axis of such rotation shaft (5), such primary tapered gear (7) being adapted to mesh and realise a bevel gear pair with at least one respective secondary tapered gear (9) adapted to actuate a related delivering pump (3) .

Inventors:
SACCHET, Alessandro (Frazione Buretto 12/A, Bene Vagienna, I-12041, IT)
Application Number:
IT2006/000817
Publication Date:
May 29, 2008
Filing Date:
November 23, 2006
Export Citation:
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Assignee:
HERO EUROPE S.R.L. (Frazione Buretto 12/A, Bene Vagienna, I-12041, IT)
SACCHET, Alessandro (Frazione Buretto 12/A, Bene Vagienna, I-12041, IT)
International Classes:
G05D11/00; B01F13/00; F04C11/00; F04C13/00
Attorney, Agent or Firm:
GARAVELLI, Paolo (A.Bre.Mar. S.r.l, Via Servais 27, Torino, I-10146, IT)
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Claims:

CLAIMS

1. Multi-pump delivering device (1) for dye-meter comprising at least two delivering pumps (3) , each one of which is connected as inlet (3a) to at least one respective storage tank of a colouring component and as outlet (3b) to at least one delivering head of said dye- meter, characterised in that said delivering pumps (3) are simultaneously actuated by means of a control kinematism comprising at least one transmission shaft (5) along which at least one primary tapered gear (7) is keyed, coaxial with a rotation axis of said rotation shaft (5) , said primary tapered gear (7) being adapted to mesh and realise a bevel gear pair with at least one respective secondary tapered gear (9) adapted to actuate a related delivering pump (3) .

2. Delivering device (1) according to claim 1, characterised in that said rotation shaft (5) is rotated by actuating means.

3. Delivering device (1) according to claim 2, characterised in that said actuating means are an electric motor.

4. Delivering device (1) according to claim 1, characterised in that said delivering pump (3) is a rotating geared volumetric pump in which its rotor (3c) is connected to said secondary tapered gear (9) arranged

coaxially to a rotation axis of said rotor (3c) .

5. Delivering device (1) according to claim 1, characterised in that it comprises at least one supporting block (11) equipped with a plurality of first seats (lla), each one of said first seats (Ha) being adapted to house a respective delivering pump (3) connected in said inlet (3a) to said storage tank by interposing at least one fitting (13) .

6. Delivering device (1) according to claim 5, characterised in that said supporting block (3) is secured to at least one supporting base (14).

7. Delivering device (1) according to claim 6, characterised in that at least two supporting bulkheads (15) of said transmission shaft (5) are secured to said supporting base (14).

8. Delivering device (1) according to claim 1, characterised in that each one of said supporting bulkheads (15) is equipped with at least one opening

(15a) for passing said transmission shaft (5) therein.

9. Delivering device (1) according to claim 8, characterised in that said opening (15a) is equipped with at least one radial bearing (17) for rotating said transmission shaft (5) .

10. Delivering device (1) according to claim 1, characterised in that said delivering pump (3) is

associated with at least one respective measuring instrument (19) inserted in a respective second seat of said supporting block (11) .

11. Delivering device (1) according to claim 10, characterised in that said measuring instrument (19) is adapted to directly or indirectly measure at least a pressure in a circuit of said colouring component delivered by said delivering pump (3) .

12. Delivering device (1) according to claim 10, characterised in that said measuring instrument (19) is a manometer.

13. Delivering device (1) according to claim 5, characterised in that said supporting block (11) is made of acetalic resin.

14. Delivering- device (1) according to claim 13, characterised in that said acetalic resin is Delrin®.

15. Delivering device (1) according to claim 1, characterised in that it comprises two supporting blocks (11) arranged symmetrically with respect to said central transmission shaft (5) equipped with a plurality of said primary bevel gears (7), each one of said primary bevel gears (7) being adapted to simultaneously mesh with two of said secondary bevel gears (9) respectively arranged on the left and right of said transmission shaft (5) .

16. Delivering device (1) according to claim 15,

characterised in that a portion of space, included between said two supporting blocks (11) and said supporting bulkheads (15) , inside which portion of space said transmission shaft (5) and said related bevel gear pairs rotate, is covered with at least one covering plate (21) .

17. Delivering device (1) according to claim 16, characterised in that said covering plate (21) is made of transparent material.

18. Delivering device (1) according to claim 17, characterised in that said transparent material is Plexiglas .

19. Delivering device (1) according to claim 1, characterised in that it is connected in series to at least one other delivering device (1) by connecting free ends of said respective transmission shafts (5) .

Description:

IMPROVED MULTI-PUMP DELIVERING DEVICE FOR DYE-METER

The present invention refers to an improved multi- pump delivering device for dye-meter.

As known, dye-meters are batching machines for preparing colouring compositions such as paints, enamels, pictures, typically comprising a plurality of storage tanks of individual components and of batching and delivering devices of such components adapted to withdraw from individual tanks accurate amounts of components, depending on desired compositions, in order to obtain the desired end composite. In general, the art has two families of dye-meters: those in which the tanks are placed on rotating platforms equipped with a kinematism adapted to place in turn the individual tanks, or individual sub-groups of tanks, on the end composite vessel in order to deliver the component and those with tanks in a fixed position connected through ducts to a multi-pump delivering device and to a delivering head placed above the end composite vessel, in which the delivery of individual components can occur simultaneously.

In particular, in this second family of dye-meters, the multi-pump delivering device, adapted to withdraw desired amounts of different colouring agents from their related tanks in order to take them to the delivering head, is realised as a plurality of pumps, typically of the geared volumetric type, each one of which is connected to a related tank with colouring agent, and in which the pumps are actuated simultaneously by a control kinematism realised as a chain or belt transmission moved by a single electric motor. Such delivering devices however have several inconveniences: first of all, the constructive complexity and the intrinsic resiliency of the kinematic chain realised through a chain or belt do not allow obtaining particularly high delivering accuracies: in fact, with every start of the control kinematism, the chain or belt must recover the various plays created with the actuating gears of the various pumps with which it cooperates, resulting in a not perfectly simultaneous and synchronised operation of all pumps .

During assembling, moreover, the installation of the control kinematism realised as a chain or belt transmission provides serious alignment problems between the various members composing it, requiring long times and particular accuracy from assembling operators, with

obvious results in terms of manufacturing costs and efficiency.

Moreover, the presence of various chains and gears can have a level of danger for maintenance operators, requiring particular preventive measures.

Therefore, object of the present invention is solving the above prior art problems by providing an improved multi-pump delivering device for dye-meter equipped with a pump control kinematism realised by using bevel gear pairs, in which the kinematic chain resiliency is extremely reduced, resulting in a more simultaneous and synchronised operation of all pumps.

Another object of the present invention is providing an improved multi-pump delivering device, which can be more easily and quickly installed on the dye-meter to be served.

Moreover, another object of the present invention is providing an improved multi-pump delivering device, which is intrinsically safer as regards the possible accidents, which it can cause to maintenance operators or to the dye-meter maintenance in areas adjacent to the delivering device.

The above and other objects and advantages of the invention, as will result from the following description are • obtained with an improved multi-pump delivering

device for dye-meter as claimed in claim 1. Preferred embodiments and non-trivial variations of the present invention are the subject matter of the dependent 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:

FIG. 1 shows a perspective view of a preferred embodiment of the improved multi-pump delivering device according to the present invention;

FIG. 2 shows a top view of the improved multi-pump delivering device of FIG. 1;

FIG. 3 shows a sectional view according to section line A-A of FIG. 2 of the improved multi-pump delivering device according to the present invention; and - FIG. 4 shows a sectional view according to section line B-B of FIG. 2 of the improved multi-pump delivering device according to the present invention.

With reference to the Figures, it is possible to note that the improved multi-pump delivering device 1 for dye-meter according to the present invention comprises at least two delivering pumps 3, each one connected as inlet 3a to at least one respective storage tank (not shown) with a colouring component and as outlet 3b to at least one delivering head (not shown) of the dye-meter itself,

such pumps 3 being actuated simultaneously through a control kinematism comprising at least one transmission shaft 5 along which at least one primary tapered gear 7 is keyed, coaxial with the rotation axis of the rotation shaft 5, adapted to mesh with and realise a bevel gear pair with at least one respective secondary tapered gear 9 adapted to actuate a related delivering pump 3; obviously, the transmission shaft 5 is rotated by suitable actuating means, such as for example an electric motor (not shown) to which the shaft 5 itself is connected preferably by interposing a joint 5a, in order to simultaneously operate the delivering pumps 3. In particular, the delivering pump 3 is a rotating geared volumetric pump in which the rotor 3c is connected to the secondary tapered gear 9, preferably arranged coaxially to the rotating axis of the rotor 3c: in such a way, by rotating the rotation shaft, the rotors 3c of all delivering pumps 3 connected thereto are rotated by interposing the respective bevel gear pair, consequently pushing certain volumetric amounts of the component contained in the related storage tank towards the dye- meter delivering head.

Obviously, by using equal transmission ratios for all bevel gear pairs, equal flow-rates are obtained from all delivering pumps 3. Otherwise, by suitably modifying

such transmission ratios, it is possible to differently adjust the flow-rates of individual delivering pumps 3.

In order to allow higher speeds and installation easiness of the delivering device 1 according to the present invention inside the respective dye-meter, this latter one can be realised as a single module comprising at least one supporting block 11 equipped with a plurality of first seats 11a, each one adapted to house a respective delivering pump 3 connected as input 3a to the related storage tank by interposing a respective fitting 13. The supporting block 3 can then be secured to at least one supporting base 14 through the most suitable securing devices or means (such as for example screws or gluing) . To the same supporting base 14, at least two supporting bulkheads 15 of the transmission shaft 5 are secured, each one of such bulkheads 15 being equipped with at least one opening 15a for passing the transmission shaft 5 there- through. Preferably, the transmission shaft 5 rotates inside the openings 15a by interposing at least one radial bearing 17 housed inside each opening 15a. To each delivering pump 3, at least one respective measuring instrument 19, such as for example a manometer, can be associated, inserted in a respective second seat thereof obtained in the supporting block 11, such measuring instrument 19 being adapted to directly or

indirectly measure at least the pressure in the circuit of the colouring component delivered by the pump 3.

Due to manufacturing easiness and efficiency, in a preferred embodiment thereof, the supporting block 11 is obtained by the plenum through suitable milling and drilling operations of a block of plastic materials, such as for example an acetalic resin like Delrin® manufactured by company DuPont of Nemours (France) . It is however wholly clear that the supporting block 11 can be manufactured through any other material and/or working though keeping similar functionality, without therefore departing from the scope of the present invention.

Due to space rationality issues, and with reference to the preferred embodiment shown in the Figure, it is possible to note that the delivering device 1 can comprise two supporting blocks 11 arranged symmetrically with respect to the central transmission shaft 5, and each one equipped with at ' least one delivering pump 3 (as an example, the Figures show a delivering device 1 according to the present invention in which each supporting block 11 is equipped with four delivering pumps 3) , thereby allowing to simultaneously actuate two different series of delivering pumps 3, arranged on the left and right of the shaft 5 in the respective supporting blocks 11. The transmission shaft 5 is

therefore equipped with a plurality of primary bevel gears 7, suitably mutually spaced, each one being adapted to simultaneously mesh with two secondary bevel gears 9 arranged respectively on the left and right of the transmission shaft 5. In order to protect the control kinematism from dust or from foreign body entering therein which could impair its operation, as well as to protect a possible operator from possible accidents when maintaining the dye-meter, the portion of space, inside which the transmission shaft 5 and the related bevel gear pairs rotate, included between the two supporting blocks 11 and the supporting bulkheads 15, can be covered through at least one covering plate 21, suitably secured to the bulkheads 15 and the blocks 11, for example through screws 21a, and preferably made of a transparent material, such as for example Plexiglas, in such a way as to easily allow a possible visual check from outside of the status of the control kinematism of the delivering device 1 according to the present invention.

The delivering device 1 according to the present invention further allows a high assembling modularity: in particular, it is possible to provide for the mutual connection of at least two delivering devices 1 in series by connecting the free ends of the respective transmission shafts 5, suitably projecting by an adequate

length from the possible supporting bulkheads 15, by interposing, for example a further joint 5a.