JPH0327999Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a filling nozzle device, and in particular, a filling nozzle device that can be used for filling solid-containing liquids such as grain juice and corn soup. It is related to.

(Prior art) Paper containers, such as milk cartons, have come to be widely used as containers for various liquids such as alcoholic beverages, soybean oil, and juice. There are cases where conventional filling nozzle devices are not suitable for liquids containing solids such as corn soup.

FIG. 1 is an explanatory diagram of a general filling device, in which a tank 1 stores contents to be filled.
A cylinder device 2 is connected to this tank 1 via a suction valve 11.
a filling nozzle device 3 having a discharge valve 12;
is connected. In the cylinder device 2, a filler piston 6 is fixed to the tip of the piston rod 5, and when the filler piston 6 makes one reciprocation within the filler cylinder 7, the container 8
can be filled with a predetermined amount of contents. That is, in a half cycle in which the cylinder device 2 is driven by a power source (not shown) and the piston rod 5 moves in the direction of arrow A, the suction valve 11 is opened, the discharge valve 12 is closed, and the contents in the tank 1 are transferred to the filler cylinder. It will be introduced in 7. Then, during a half cycle of movement of the piston rod 5 in the direction of arrow B, the suction valve 11 is closed and the discharge valve 12 is opened, filling the container 8 with the contents in the filler cylinder 7.

FIG. 2 is an explanatory diagram of a conventional general milk filling nozzle device, in which a discharge valve 22 provided in a sleeve 20 has a spring 23 connected to a retainer 24
By pressing upward, the seal portion 21 of the sleeper 20 is closed from below. In the cylinder device 2, when the piston rod 5 moves in the direction of arrow B, the liquid pressure of the contents becomes greater than the pressure of the spring 23, and as a result, the discharge valve 22 separates from the seal portion 21, creating a gap here. . The contents discharged from this gap reach the lower end of the sleeve 20. Since a screen 25 is attached to the lower end of this sleeve 20, the liquid flows laminarly and is filled into the container 8 with suppressed bubbling.

(Problems to be Solved by the Invention) The conventional filling nozzle device equipped with a screen as described above cannot be applied to liquid materials containing solids. Therefore, if the sleeve 20 is used with the screen removed, the contents flow into the container 8 from the entire circumference of the lower end of the sleeve 20 in the form of a continuous thin film curtain. Therefore, the air in the space surrounded by the thin film of flow and the inner surface of the container is deprived of a place to escape, and is compressed as the filling amount increases. As a result, during the filling operation, a phenomenon occurs in which the compressed air suddenly breaks through the flow membrane and sprays out the contents, ie, blowing up.

(Means for Solving the Problems) In view of the above-mentioned circumstances, the present invention provides a filling nozzle device that does not cause foaming or spouting even without a screen. That is, in the present invention, the seal portion is arranged near the outlet of the sleeve, the lower surface of the discharge valve is formed into a dome shape, and at least two strip-shaped ribs are arranged radially from the apex of the dome on the surface of the dome. On the other hand, the inner wall surface of the lower end of the sleeve is curved into a spherical shape to narrow the flow path at the lower end of the outlet so that the dome surface protrudes from the lower end of the outlet of the sleeve when the discharge valve is lowered. Features: Nozzle device for filling liquids.

(Function) In the filling nozzle device of the present invention, when the discharge valve leaves the seal part, the contents flow down from the gap, but since the seal part is provided near the outlet of the sleeve, the falling distance to the container is reduced. Short and suppresses foaming. Moreover, after the contents are discharged from the narrow gap between the discharge part and the seal part, the contents flow down at a rapid speed along the inner wall surface of the lower end of the sleeve in a layered manner. At this time, since the inner wall surface of the lower end of the sleeve is curved into a spherical shape, the flow of the contents also follows the shape of this inner wall surface, and even after leaving the lower end of the outlet of the sleeve, it influences the shape of the inner wall surface. The flow becomes a curtain-like flow of a thin film, usually several millimeters thick, that flows downward while narrowing in the shape of an inverted cone. Then, when the curtain-like flow narrows the circle somewhat, as the discharge valve descends, it collides with the band-like rib provided on the dome-shaped lower surface of the valve that protrudes from the lower end of the outlet of the sleeve, and the curtain-like flow becomes vertical. It is cut in the same direction as the number of strip ribs. Therefore, the air in the space surrounded by the thin film of flow and the inner surface of the container can also communicate with the outside air, and as the amount of contents in the container increases, the air in the inner space escapes to the outside through this cut. This will prevent the contents from spewing out.

In this way, in the present invention, by curving the inner wall surface of the lower end of the sleeve, it becomes possible to cut the flow by the band-like ribs on the dome surface.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 3 and 4. Note that FIG. 3 shows the nozzle in a closed state, and FIG. 4 shows the nozzle in an open state. In FIG. 3, a seal portion 31 is provided near the outlet 30. A discharge valve 32 that closes off this seal portion 31 from the downstream side is attached to the lower end of the valve rod 38. Since a retainer 34 fixed to the valve rod 38 is pressed upward by a spring 33, the discharge valve 32 closes the seal portion 31 from the downstream side. The flow path can be blocked. Note that an annular ring 37 is attached to the discharge valve 32 to completely block the flow path. Further, 39 is a valve seat of the spring 33.

During filling, pressure is applied to the contents by the cylinder device 2 (Fig. 2), and this liquid pressure is applied to the spring 3.
When the pressure exceeds 3, as shown in Figure 4,
When the discharge valve 32 is separated from the seal portion 31, the contents are discharged from the gap and filled into the container 8.

The lower surface of the discharge valve 32 according to the present invention is formed into a dome shape, as shown in the perspective view of FIG. There is. The number of band-like ribs must be two or more, and approximately three to five is appropriate. Further, as shown in FIGS. 3 and 4, the inner wall surface of the lower end of the sleeve from the seal portion 31 to the lower end of the outlet is constituted by a spherical curved surface to narrow the flow path at the lower end of the outlet.

In the present invention, the height of the belt-shaped rib 40 from the dome surface is arbitrary, but if we take the case where the content is milk as an example, the curtain-like flow of the content that the belt-shaped rib 40 tries to cut is thick. When the height is 1.5 mm, if the height is at least 1.0 mm, it is possible to partially weaken the curtain-like flow and provide an opening for air removal. Furthermore, if the height is 1.6 mm or more,
Can provide a perfect cut for air removal.

(Effects) Since the present invention is constructed as described above, there is no risk of bubbling or blowing up, and there is no need for a screen as in conventional devices, so that solid-containing liquid can be reliably filled. It goes without saying that the filling nozzle device of the present invention can also be applied to liquid materials without solid content.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a general filling device, FIG. 2 is an explanatory diagram of a conventional filling nozzle device, and FIGS. 3 and 4 are each a closed state of a filling nozzle device according to an embodiment of the present invention. FIG. 5 is a perspective view of the valve according to the present invention. DESCRIPTION OF SYMBOLS 1... Tank, 2... Cylinder device, 3... Filling nozzle device, 8... Container, 11... Suction valve, 12... Discharge valve, 30... Sleeve, 3
1...Seal part, 32...Valve, 33...Spring, 34...Retainer, 39...Valve seat, 40
...band-shaped ribs.

Claims (1)

[Scope of utility model registration request] For filling, a sleeve having a seal portion with a narrowed flow path is provided with a discharge valve located downstream of the seal portion that opens and closes the flow path by moving up and down depending on the balance between the hydraulic pressure of the fluid and the spring pressure. In the nozzle device, the seal portion is disposed near the outlet of the sleeve, the lower surface of the discharge valve is formed into a dome shape, and at least two strip-shaped ribs are provided on the surface of the dome radially from the apex of the dome. On the other hand, the inner wall surface of the lower end of the sleeve is curved into a spherical shape to narrow the flow path at the lower end of the outlet so that the dome surface protrudes from the lower end of the outlet of the sleeve when the discharge valve is lowered. A nozzle device for filling a liquid, characterized in that: