JPS598970Y2 - Snow-like dry ice generation device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an apparatus for producing snow-like dry ice by adiabatically expanding liquid carbon dioxide gas.

In conventional snow-like dry ice production equipment, the snow-like dry ice that has settled at the bottom of the production cylinder is blown up by the gas flow of liquid carbon dioxide that is injected into the production cylinder, and is released outside the production cylinder. Snow-like dry ice flows out from the raw cylinder on the gas body,
There was a problem in that the loss of snow-like dry ice was large.

If the release of the gas is reduced in order to prevent the snow-like dry ice from flowing out, there is a problem in that the pressure within the production cylinder increases and the speed at which the snow-like dry ice is produced becomes slow.

The present invention has been proposed in view of these points, and is designed to reduce the amount of snow-like dry ice that flows out, even though the production speed of snow-like dry ice is fast.

Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a perspective view of a snow-like dry ice production device, and FIG. 2 is a central vertical cross-sectional view. Reference numeral 1 denotes a snow-like dry ice cylinder formed by curving a square cylinder with a downwardly expanding tapered shape to the side at its upper side, and inside the snow-like dry ice cylinder 1 there is a liquid carbon dioxide gas ejection chamber 2. and snow-like dry ice accumulation chamber 3
It is shaped like a series of vertical and vertical lines.

The liquid carbon dioxide gas ejection chamber 2 is located above the curved part of the production cylinder 1, and a liquid carbon dioxide gas injection nozzle 5 is installed in the upper end opening 4 of the production cylinder 1, so that the ejected liquefied gas directly forms snow-like dry ice. It is installed in such a way that it does not spray into the storage chamber 2.

Exhaust windows 6 and 7 are opened in the peripheral walls of the liquid carbon dioxide gas ejection chamber 2 and the snow-like dry ice production chamber 3, respectively, and each exhaust window 6 and 7 is made of a porous plate 8, such as a sintered metal. It is blocked at 9.

These porous plates 8 and 9 have air permeability of the porous plate 8 on the side of the exhaust window 6 formed in the liquid carbon dioxide gas ejection chamber 2 such that the air permeability of the porous plate 8 on the side of the exhaust window 6 formed in the liquid carbon dioxide gas ejection chamber 2 is such that the air permeability of the porous plate 8 on the side of the exhaust window 7 formed in the chamber 3 is high. It has a larger shape than the air permeability of the quality plate 9.

A snow-like dry ice outlet 10 is opened at the lower end of the snow-like dry ice production cylinder 1, and the snow-like dry ice outlet 10 is closed by a lid 11 made of a porous plate so as to be openable and closable.

As shown in FIG. 3, the liquid carbon dioxide gas jetting nozzle 5 is connected to a lid plate 1 that closes the upper end opening 4 of the snow-like dry ice storage cylinder 1.
The opening 14 of the nozzle insertion hole 13 on the side of the liquid carbon dioxide ejection chamber 2 is inserted and fixed into the nozzle insertion hole 13 provided through the nozzle insertion hole 13.
is formed into a tapered surface that widens at the front so as to serve as a guide surface for the ejected gas.

Reference numeral 15 in the figure is a heat insulating layer.

FIG. 4 shows a modification of the present invention, in which the upper part of the snow-like dry ice tube 1 is curved approximately 180 degrees, and the liquid gas is inserted into the small-diameter opening 4a of the tapered dry ice tube 1. A lid body 12 with an ejection nozzle 5 attached thereto is fixed via an orifice plate 16 having a gas passage 16 in the form of a tapered shape, and the tapered surface 18 is shaped as an ejected gas guide surface.

FIG. 5 is a perspective view showing an example of the use of the snow-like dry ice production device of the present invention, in which a compression mold cylinder 20 is disposed below the snow-like dry ice production cylinder 1, and the snow-like dry ice production system is A compression actuator 21 that supplies snow-like dry ice from a cylinder 1 into a compression cylinder 20 by falling under its own weight, and is disposed below the compression cylinder 20.
This compresses and solidifies snow-like dry ice.

As described above, the present invention has a liquid carbon dioxide gas ejection chamber connected in a curved manner above the snow-like dry ice accumulation chamber which is shaped like a downwardly expanding shape to form a cylinder. Exhaust windows are opened in each peripheral side wall of the chamber and the snow-like dry ice accumulation chamber, and the airflow rate at the exhaust window of the liquid carbon dioxide gas ejection chamber is made larger than that at the exhaust window of the snow-like dry ice accumulation chamber. Therefore, the gases generated during the formation of snow-like dry ice and the gases generated by the sublimation of snow-like dry ice flow out through the exhaust window, and the pressure inside the raw cylinder can be maintained at a low pressure state, resulting in a short period of time. It is possible to create a large amount of snow-like dry ice within a certain amount of time.

Furthermore, since the gas can be efficiently produced or discharged outside the cylinder, the amount of gas mixed into the snow-like dry ice can be reduced, and the density of the snow-like dry ice in the storage chamber can be increased.

Moreover, since the carbon dioxide gas ejection nozzle is arranged so that its ejection direction intersects with the axial direction of the snow-like dry ice accumulation chamber and does not face directly into the snow-like dry ice accumulation chamber, the ejection nozzle The ejected liquid carbon dioxide gas is not blown directly into the snow-like dry ice accumulation chamber, and
Snow-like dry ice is not thrown up by the ejected gas flow, preventing the snow-like dry ice from flowing out of the production cylinder, and improving the production capacity of snow-like dry ice.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view, Fig. 2 is a central vertical sectional view, Fig. 3 is an enlarged view of part III of Fig. 2, and Fig. 4 is an enlarged view of section III of Fig. 2.
The figure is a view corresponding to FIG. 2 showing a modified example, and FIG. 5 is a perspective view showing an example of use of the present device. 1...Dry ice production cylinder, 2...Liquid carbon dioxide gas ejection chamber, 3...Snow-like dry ice accumulation chamber, 5...Liquid carbon dioxide gas Spout nozzle, 6,7
...Exhaust window, 10...Snowy dry ice discharge port, 11...Lid body, 19...2
ceiling wall.

Claims (2)

[Scope of utility model registration request] 1. A liquid carbon dioxide gas ejection chamber 2 is connected in a curved manner to the upper side of a snow-like dry ice accumulation chamber 3 which is shaped like a downward expansion, and a production tube 1 is constructed. Exhaust windows 6 and 7 are opened in each circumferential wall of the ice accumulation chamber 3, and the air permeability at the exhaust window 6 of the liquid carbon dioxide gas ejection chamber 2 is determined from the air permeability at the exhaust window 7 of the snow-like dry ice accumulation chamber 3. The snow-like dry ice discharge port 10 opened on the lower surface of the snow-like dry ice accumulation chamber 3 is closed in an openable/closable manner with a lid body 11, and carbon dioxide gas is ejected into the end of the liquid carbon dioxide gas ejection chamber 3. The nozzle 5 is arranged so that its ejection direction intersects with the axial direction of the snow-like dry ice accumulation chamber 3 and does not directly face the snow-like dry ice accumulation chamber 3, and the carbon dioxide gas is ejected to the attachment part of the carbon dioxide ejection nozzle 5. A snow-like dry ice production device characterized by having a shaped gas guide surface. 2. In the apparatus for producing snow-like dry ice described in claim 1 of the utility model registration claim, the axial direction of the liquid carbon dioxide gas jetting nozzle 5 and the axial direction of the snow-like dry ice accumulation chamber 3 are angularly deviated by 90 degrees or more. What I am allowed to do.