The invention relates to a filling head with low Reynolds number, consisting of an inner body (2) and an outer body (3), in which one moves axially with respect to the other, there being a space (4) delimited between them that configures the dynamic characteristics that the flow will have, comprisin
The invention relates to a filling head with low Reynolds number, consisting of an inner body (2) and an outer body (3), in which one moves axially with respect to the other, there being a space (4) delimited between them that configures the dynamic characteristics that the flow will have, comprising a damping zone A with inlet (5) located on a different axis from that of the outlet (6), a pressure-loss zone B with seated valve (7), a zone C, with low Reynolds number, composed of n channels (10), with n fins (9) greater than 3 and LRHC less than 4, an ogival acceleration zone D and a nozzle (8) or closure zone E with a seal (13).
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1. A filling head with low Reynolds number, of the type intended to fill liquids or fluids in corresponding containers by means of both a linear and rotary filler, comprising an inner body and an outer body, in which one moves axially with respect to the other, there being a space delimited between
1. A filling head with low Reynolds number, of the type intended to fill liquids or fluids in corresponding containers by means of both a linear and rotary filler, comprising an inner body and an outer body, in which one moves axially with respect to the other, there being a space delimited between them forming a fluid passage zone subdivided into five zones: a damping zone A having an inlet,a pressure-loss zone B having a seated valve containing an outlet through which extends the inner body,a zone C with low Reynolds number,an acceleration zone D, anda nozzle or closure zone E, wherein: the damping zone A has a volume in the order of 50% or greater than the volume enclosed between the outer body and the inner body;the pressure-loss zone B is designed to obtain a velocity curve during the closing and the opening of the nozzle, wherein the diameter of the inner body varies along the pressure-loss zone B, so that the slope of the velocity curve decreases continuously as the seated valve closes, more quickly at the beginning and more slowly at the end;the inner body along the acceleration zone D and the closure zone E has an ogive shape; andthe acceleration zone D is designed to achieve a constant acceleration of the fluid along zone D, wherein the annular section of the fluid passage varies along zone D so that the velocity in zone D increases linearly; andthe zone C with low Reynolds number comprises a plurality of fins defining a same number n of channels between the fins for the passage of liquid or fluid, wherein the geometry of the filling head is defined by a characteristic coefficient that follows the expression: LRHC=12Dext_C2-Dint_C2(1+nπ)Dext_C+(1-nπ)Dint_CwhereinLRHC is the characteristic coefficient of the geometry of the filling head, being LRHC less than 4;Dint—C is the diameter of the inner body in the zone C with low Reynolds number;Dext—C is the inner diameter of the outer body in zone C with low Reynolds number;n is the number of fins and channels, greater than 3;wherein zone C has a length necessary to be able to break the fluid turbulence. 2. The filling head with low Reynolds number according to claim 1, wherein the maximum diameter of the inner body in the zone B is smaller than the inner diameter of the outer body in said zone B. 3. The filling head with low Reynolds number according to claim 1, wherein the variation of the diameter of the inner body in the pressure-loss zone B follows the expression: Dint_B=k1-(1Cc-1)k2(k3vout-2+k4)1/2whereinDint—B is the diameter of the inner body in the pressure-loss zone B;vout is the product velocity upon coming out of the nozzle, a value depending on the position of the inner body with respect to the outer body;ki are constants;Cc is the coefficient of contraction;whereinvout reaches a maximum value when the seated valve is open;yout reaches a 50% of the maximum value when the seated valve has closed approximately the 25% of its stroke; andvout is negligible when the seated valve is close. 4. The filling head with low Reynolds number according to claim 1, wherein the variation of the section of the fluid passage along acceleration zone D follows the expression: S(x)=1k1+k2xwhereinLRHC is the characteristic coefficient of the geometry of the filling head, being LRHC less than 4;Dint—C is the diameter of the inner body in the zone C with low Reynolds number;Dext—C is the inner diameter of the outer body in zone C with low Reynolds number;n is the number of fins and channels, greater than 3;wherein the length of the zone C is the necessary length in order to be able to break the fluid turbulences. 5. The filling head with low Reynolds number according to claim 1, wherein the acceleration zone D has a length that follows the expression: L≈581awhereinL is the length of the acceleration zone D;a is the constant acceleration of the fluid along zone D, comprised between 50%-90% of the value of the acceleration of gravity. 6. The filling head with low Reynolds number according to claim 1, wherein the closure zone E incorporates a seal of the same or different material from the actual body at the lower end of the inner body; and wherein the end part of the filling nozzle in the outer body has an abrupt end with a slightly more open angle than that of the inner body in the closure zone E, and contacting on the seal of the inner nozzle in the closed position.
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Sogliani Claudio (Cerese di Virgilio ITX) Corniani Carlo (Marmirolo ITX), Dispenser device for liquid substances.
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