JPH11116224A - Apparatus for production of dry ice - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an apparatus for production of high-quality block-shaped dry ice which efficiently prevents the clogging of a filter and the abrasion damage by the vertical movement of a piston, hardly generates rust, is uniform over the entire part and hardly produces blow holes. SOLUTION: This apparatus 56 for production of the dry ice comprises a snow case body 48 which is fixed with a snow case 16 to a machine frame 1 provided with guide rails 42 for guiding the four corners of the piston at the four corners of the inside wall surfaces, a pair of 'Teflon (R)' plates 51 which have liquefied carbon dioxide filling holes 50 fixed to make the inside wall surfaces and inside wall surfaces of guide rails nearly flush with each other so as to cover one of the inside wall surfaces facing each other of the snow case body, a pair of sintering plates 53 which are fixed to make the inside wall surfaces and inside wall surfaces of the guide rails nearly flush with each other so as to cover the other inside wall surfaces facing each other of the snow case body and are capable of discharging liquefied gases and cover plates 55 which are connected with connecting pipes 54 mounted at the snow case body so as to cover the outer peripheral parts of a pair of these sintering plates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing dry ice in a block form from liquefied carbon dioxide gas.

[0002]

2. Description of the Related Art A conventional snow case of a dry ice manufacturing apparatus has an inner wall surface formed of a stainless steel plate, a liquefied carbon dioxide gas filling hole formed on one of the opposed inner wall surfaces, and a vaporized on the other opposed inner wall surface. A filter using a plurality of filter cloths for discharging gas, a mesh material, a thin plate having a large number of minute holes, and the like is used.

[0003]

Since the snow case of the conventional dry ice manufacturing apparatus uses a filter using a plurality of materials, the snow case cannot be sufficiently discharged due to clogging. There was a disadvantage that the filter was easily worn and damaged by the vertical movement of the piston. In addition, water droplets easily adhere to the inner wall surface of the snow case and rust is easily generated, and snow dry ice generated from liquefied carbon dioxide gas filled in the snow case tends to be uneven, so press However, there is a drawback that the whole is not pressed uniformly, so that it is impossible to produce high quality block-shaped dry ice.

The present invention has been made in view of the above-mentioned conventional drawbacks,
To provide a high-quality block-shaped dry ice manufacturing apparatus that efficiently prevents wear and tear due to clogging of a filter and vertical movement of a piston, and is less likely to rust, is uniform throughout, and is less likely to cause soot. It is an object.

The above and other objects and novel features of the present invention will become more completely apparent when the following description is read in conjunction with the accompanying drawings. However, the drawings are for explanation only, and do not limit the technical scope of the present invention.

[0006]

In order to achieve the above object, the present invention provides a machine frame, a cylindrical snow case fixed to the machine frame and capable of discharging molded dry ice to a lower portion, An opening / closing lid that opens and closes the lower end of the snow case with an opening / closing device, a cylinder device that moves a piston that moves up and down in the snow case attached to the machine frame, and fills the snow case with liquefied carbon dioxide gas A dry ice manufacturing apparatus comprising: a carbon dioxide gas supply device; and a discharge mechanism that discharges molded dry ice discharged downward by opening the opening / closing lid to the outside. A snow case body fixed to the machine frame provided with a guide rail for guiding a square of a piston; A pair of Teflon plates having a liquefied carbon dioxide gas filling hole fixed so that the inner wall surface and the inner wall surface of the guide rail are substantially flush with each other so as to cover the inner wall surface, and the other opposing inner wall surface of the snow case body And a pair of sintered plates capable of discharging vaporized gas fixed such that the inner wall surface and the inner wall surface of the guide rail are substantially flush with each other, and covering the outer peripheral portions of the pair of sintered plates. As described above, the cover plate to which the exhaust pipe attached to the snow case body is connected constitutes a dry ice manufacturing apparatus.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the drawings.

In the first embodiment of the present invention shown in FIGS. 1 to 12, reference numeral 1 denotes a machine frame. The machine frame 1 includes a lower base frame 2 installed on a floor surface and a lower base frame 2. In the embodiment of the present invention, a plurality of pillars 4, 4, 4, and three pillars 4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 6, 7, 8, 7, 8, 7, 8, 8, 9 4, 4 and a snow case support frame 5 fixed to the square portion of the snow case support frame 5 via nuts 6, 6, respectively, on the upper end portions of cylinder support columns 7, 7, 7, 7 respectively. It comprises a cylinder support frame 8 mounted via nuts 6,6.

Reference numeral 9 denotes a control panel mounted on one rear side of the lower base frame 2 of the machine frame 1. The control panel 9 includes pressure switches 10, 10, relief valves 11, 11, an oil pressure gauge 1
2, 12, a timer 13 and the like are incorporated.

Reference numeral 14 denotes a motor installed at a position near the rear center of the lower base frame 2 of the machine frame 1.
4 is a hydraulic pump 1 installed at both ends of the electric motor 14
5 and 15 are driven.

Reference numeral 16 denotes a snow case supporting frame 5 of the machine frame 1.
A plurality of bolts 1 through a U-shaped opening / closing lid support frame 17
8. A cylindrical snow case capable of discharging molded dry ice fixed by the nut 19 downward.

Reference numeral 20 denotes a support column 2 having the lower end of the snow case 16 erected at the center rear of the lower base frame 2 of the machine frame 1.
The opening / closing lid support frame 17 is opened and closed by an opening / closing device 22 using a hydraulic cylinder fixed to the upper part of the support 1 and the upper part of the support 4.
An open / close lid that slides inside and opens and closes.

Reference numeral 23 denotes a cylinder device in which an operation rod 24 fixed to the cylinder support frame 8 of the machine frame 1 moves vertically, and the tip of the operation rod 24 of the cylinder device 23 is provided inside the snow case 16. A piston 28, which moves up and down and has a press plate 26 made of a Teflon plate fixed at its distal end with a number of countersunk screws 27 via a reinforcing plate 25, is attached.

The vertical movement of the piston 28 of the cylinder device 23 is caused by the operation piece 29 attached to the operation rod 24.
Moves to a position where the limit switches 31 and 32 attached to the upper and lower positions of the sensor attachment plate 30 attached to the cylinder support frame 8 operate.

Reference numeral 33 denotes a carbon dioxide gas supply device for filling the snow case 16 with liquefied carbon dioxide gas. The carbon dioxide gas supply device 33 is a liquefied carbon dioxide gas filled in the snow case 16 on the opposite surface of the snow case 16. Is attached to a swirling part, and the liquefied carbon dioxide gas rotary supply nozzles 34, 34 capable of supplying the liquefied carbon dioxide gas to be filled in a rotating state, and the liquefied carbon dioxide gas rotary supply nozzles 34, 34 Suction of liquefied carbon dioxide gas
5, a liquefied carbon dioxide gas supply hose 36 supplied from a tank or a cylinder (not shown) filled with liquefied carbon dioxide gas.

A discharge mechanism 37 discharges the dry ice formed by the snow case 16 downward by opening the opening / closing lid 20. The discharge mechanism 37 discharges the dry ice discharged from the snow case 16 downward. A dry ice support table 38 for supporting the rodless cylinder 3 for vertically moving the dry ice support table 38
9, a shooter 40 having an inclined surface for supporting only dry ice supported by the dry ice support table 38 lowered by the operation of the rodless cylinder 39 and sliding forward, and sliding from the shooter 40 And a dry ice receiving stand 41 for receiving incoming dry ice.

The snow case 16 is shown in FIGS.
As shown in the figure, a square frame-shaped inner snow case main body 43 in which guide rails 42, 42, 42, 42 for guiding the squares of the piston 28 are formed on a square portion of the inner wall, and the outer side of the inner snow case main body 43 A square frame-shaped outer snow case having upper and lower flanges 45 and 46 projecting therefrom and having bolt insertion holes 44 formed at upper and lower portions of the snow case support frame 5 of the machine frame 1 and fixed by a plurality of bolts 18 and nuts 19. Snow case body 48 consisting of body 47
The inner wall surfaces of the guide rails 42, 42, 42, and 42 are flush or substantially flush with each other so as to cover the inner wall surface of the snow case body 43 near the upper portion of the snow case body 43. The upper inner wall plates 49, 49, 49, 49 of stainless steel or the like, which are fixed by a plurality of countersunk screws 27 and have excellent wear resistance and corrosion resistance, and one of the inner snow case main bodies 43 opposed to the upper part. The guide rails 42, 42, 42, 42 are fixed by a plurality of countersunk screws 27 so as to cover the inner wall surface at the lower position of the inner wall plates 49 and 49 so that the inner wall surfaces and the inner wall surfaces of the guide rails 42, 42, 42, 42 are flush or substantially flush with each other. Liquefied carbon dioxide gas filling holes 50, 5
0 and a pair of Teflon plates 51, 51 having a thickness of about 5 millimeters and the guide rails so as to cover the inner wall surfaces at the lower positions of the other opposing upper inner wall plates 49, 49 of the inner snow case body 43. 42, 4
A pair of plates each having a thickness of about 5 mm capable of discharging vaporized gas fixed by a plurality of countersunk screws 27 so that the inner wall surfaces of the plates 2, 42, 42 are flush or substantially flush with each other. It is composed of binding plates 53, 53 and cover plates 55, 55 to which exhaust pipes 54, 54 attached to the outer snow case main body 47 so as to cover the outer peripheral portions of the pair of sintered plates 53, 53 are connected. Have been.

In the dry ice manufacturing apparatus 56 having the above structure, the cylinder device 23 operates to position the piston 28 at an upper position in the snow case 16, and the opening / closing device 22 using a hydraulic cylinder operates to support the opening / closing lid. Frame 1
The opening / closing lid 20 is positioned inside 7 and the lower end of the snow case 16 is closed.

In this state, the control panel 9 controls the snow case 16
The supply time and the like of the liquefied carbon dioxide gas to be filled into the inside are set and operated, so that the snow case 16 as shown in FIG.
Liquefied carbon dioxide gas is supplied in a rotating state from the liquefied carbon dioxide gas rotation supply nozzles 34, 34 of the carbon dioxide gas supply device 33,
And it is supplied for a predetermined time in a state of swirling in the snow case 16.

The liquefied carbon dioxide gas filled in the snow case 16 is turned into snow and accumulated in the snow case 16, and the vaporized gas passes through the sintered plates 53, 53 and is exhausted from the cover plates 55, 55. It is discharged outside through the pipes 54,54. When the liquefied carbon dioxide gas is filled in the snow case 16 for a predetermined time, the cylinder device 23
Operates to lower the piston 28, and the snow case 16
The dry ice in the snow state piled in the inside is pressed at a predetermined pressure to form a block-shaped dry ice 57.

At this time, the square portion of the piston 28 is connected to the guide rails 42, 42, 42, 4 of the square portion of the snow case 16.
2 when the piston 28 moves up and down, the Teflon plates 51 and 51 and the sintered plate 5 move up and down.
Since there is no frictional contact between the sintering plates 3 and 53, it is unlikely that the sintering plates 53 and 53 are clogged due to wear and damage. When the block-shaped dry ice 57 is formed in the snow case 16, the opening / closing device 22 using the hydraulic cylinder is operated to slide the opening / closing lid 20 to the open position, and then the cylinder device 23 is operated. The piston 28 is further pushed down, and the block-shaped dry ice 57 in the snow case 16 is pushed down, and is positioned on the dry ice support table 38 of the discharge mechanism 37.

After that, the dry ice support table 38
By operating the rodless cylinder 39 to lower the dry ice 57, the block-shaped dry ice 57 supported on the dry ice support table 38 is positioned on the shooter 40, and automatically slides to move the dry ice
1 above.

When the dry ice 57 is discharged from the dry ice support table 38, the rodless cylinder 39
Operates to position the dry ice support table 38 to a position where the next dry ice can be supported, the cylinder device 23 is operated to position the piston 28 at the upper portion, and the opening / closing device 22 using the hydraulic cylinder is operated. The lower end of the snow case 16 is closed by the opening / closing lid 20. Such operations are sequentially repeated to produce block-shaped dry ice sequentially.

[0024]

FIG. 13 to FIG. 20 show different embodiments of the present invention.
Hereinafter, different embodiments of the present invention will be described. In the description of the different embodiments of the present invention, the same components as those of the first embodiment of the present invention are denoted by the same reference numerals, and duplicate description will be omitted.

The second embodiment of the present invention shown in FIGS. 13 to 16 is mainly different from the first embodiment of the present invention in a snow case 16A. As shown in FIG. 16, a dry ice manufacturing apparatus using a snow case 16A formed in this way is that upper inner wall plates 49A, 49A, 49A, 49A using a Teflon plate having a thickness of about 5 mm are used. Even with 56A, the same operation and effect as those of the first embodiment of the present invention can be obtained.

In the third embodiment of the present invention shown in FIGS. 17 to 20, the main difference from the first embodiment of the present invention is a snow case 16B. As shown in FIG. 20, upper inner wall plates 49, 49, 49, 49 are formed on the upper inner wall surface of the inner snow case main body 43A having no square guide rail, and a pair of Teflon plates 51, 51 and a pair of sintered bodies are formed on the lower inner wall surface. At the point covered with the plates 53, 53, a dry ice manufacturing device 56B using the snow case 16B thus formed may be used.

[0027]

As apparent from the above description, the following effects can be obtained in the present invention.

(1) A machine frame, a cylindrical snow case fixed to the machine frame and capable of discharging molded dry ice to a lower portion, and an opening / closing lid for opening and closing a lower end portion of the snow case by an opening / closing device. A cylinder device for vertically moving a piston that moves vertically in the snow case attached to the machine frame, a carbon dioxide gas supply device for filling the snow case with liquefied carbon dioxide gas, and a lower portion by opening the opening / closing lid. A dry mechanism for discharging the molded dry ice discharged to the outside, wherein the snow case is provided with a guide rail for guiding a square of the piston at a square portion of an inner wall of the snow case. A snow case body fixed to the frame, and an inner wall surface of the guide rail so as to cover one of the inner wall surfaces facing the snow case body. A pair of Teflon plates having liquefied carbon dioxide gas filling holes fixed such that the inner wall surfaces are substantially flush with each other, and the inner wall surface and the inner wall surface of the guide rail so as to cover the other opposing inner wall surfaces of the snow case body. A pair of sintered plates capable of discharging vaporized gas fixed so that they are substantially flush with each other, and an exhaust pipe attached to the snow case body so as to cover the outer peripheral portions of the pair of sintered plates. Since it is constituted by the cover plate to be connected, the pair of sintered plates can be used as a filter for discharging the vaporized gas and the other opposing wall surface for forming the block-shaped dry ice. Therefore, accurate block-shaped dry ice can be formed.

(2) According to the above (1), since a pair of sintered plates is used, the vaporized gas can be exhausted to the outside of the entire sintered plate. Therefore, since the discharge of the vaporized gas is uniform and can be performed efficiently, snow-like dry ice can be uniformly piled in the inside, and it is possible to produce a uniform, pressed and smooth block-like dry ice. it can.

(3) According to the above (1), since a pair of Teflon plates is used, the molded block-shaped dry ice can be smoothly discharged without rust even if water droplets adhere. it can.

(4) According to the above (1), since the guide rail is provided in a square, the piston can be moved up and down along the guide rail. Therefore, since the piston does not come into frictional contact with the pair of Teflon plates or the pair of sintered plates due to the vertical movement of the piston, the expensive pair of Teflon plates can be reliably prevented from being worn and damaged by the pair of sintered plates, and can be used for a long time. can do.

(5) Claim 2 has the same effect as (1) to (4).

(6) Claim 3 has the same effect as (1) to (3).

[Brief description of the drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is a plan view of the first embodiment of the present invention.

FIG. 3 is a side view of the first embodiment of the present invention.

FIG. 4 is a rear view of the first embodiment of the present invention.

FIG. 5 is an enlarged sectional view of a main part of the first embodiment of the present invention.

FIG. 6 is a front view of the snow case according to the first embodiment of the present invention.

FIG. 7 is a plan view of the snow case according to the first embodiment of the present invention.

FIG. 8 is a side view of the snow case according to the first embodiment of the present invention.

FIG. 9 is a sectional view taken along lines 9-9 in FIG. 6;

FIG. 10 is a sectional view taken along the line 10-10 in FIG. 6;

FIG. 11 is an explanatory diagram showing a state where liquefied carbon dioxide gas is supplied into the snow case.

FIG. 12 is an explanatory view showing a state in which dry ice is discharged.

FIG. 13 is a side view of the second embodiment of the present invention.

FIG. 14 is a front view of a snow case according to a second embodiment of the present invention.

FIG. 15 is a plan view of a snow case according to a second embodiment of the present invention.

FIG. 16 is a sectional view taken along the line 16-16 in FIG. 14;

FIG. 17 is a side view of the third embodiment of the present invention.

FIG. 18 is a front view of a snow case according to a third embodiment of the present invention.

FIG. 19 is a plan view of a snow case according to a third embodiment of the present invention.

FIG. 20 is a sectional view taken along the line 20-20 in FIG. 18;

[Description of Signs] 1: Machine frame, 2: Lower base frame, 3: Oil tank, 4: Post, 5: Snow case support frame, 6: Nut, 7: Cylinder support column, 8: Cylinder support frame, 9: Control panel, 10: Pressure switch, 11: Relief valve, 12: Oil pressure gauge, 13: Timer, 14: Electric motor, 15: Hydraulic pump, 16, 16A, 16B: Snow case, 17: Opening / closing lid support frame, 18: Bolt , 19: Nut, 20: Opening / closing lid, 21: Post, 22: Opening / closing device using hydraulic cylinder, 23: Cylinder device, 24: Operating rod, 25: Reinforcement plate, 26: Press plate, 27: Countersunk screw, 28 : Piston, 29: Working piece, 30: Sensor mounting plate, 31: Upper limit switch, 32: Lower limit switch, 33: Carbon dioxide gas supply device, 34: Liquefied carbon dioxide gas rotary supply Supply nozzle, 35: suction solenoid valve, 36: liquefied carbon dioxide gas supply hose, 37: discharge mechanism, 38: dry ice support table, 39: rodless cylinder, 40: shooter, 41: dry ice receiving table, 42: guide rail 43, 43A: inner snow case main body, 44: bolt insertion hole, 45: upper flange, 46: lower flange, 47: outer snow case main body, 48: snow case main body, 49, 49A: upper inner wall plate, 50: liquefaction Carbon dioxide filling hole, 51: Teflon plate, 53: Sintered plate, 54: Exhaust pipe, 55: Cover plate, 56, 56A, 56B: Dry ice production device, 57: Block-shaped dry ice

Claims (3)

[Claims] 1. A machine frame, a cylindrical snow case fixed to the machine frame and capable of discharging molded dry ice to a lower portion, and an opening / closing lid for opening and closing a lower end portion of the snow case by an opening / closing device. A cylinder device for vertically moving a piston that moves vertically in the snow case attached to the machine frame, a carbon dioxide gas supply device for filling liquefied carbon dioxide gas in the snow case, and a downward opening by opening the opening / closing lid. A dry ice manufacturing apparatus comprising: a discharge mechanism for discharging molded dry ice to be discharged to the outside; wherein the machine frame is provided with a guide rail for guiding a square of the piston at a square portion of an inner wall of the snow case. A snow case main body fixed to the main body, and an inner wall and an inner wall of the guide rail so as to cover one opposing inner wall of the snow case main body. A pair of Teflon plates having liquefied carbon dioxide gas filling holes fixed so that the surfaces are substantially the same, and the inner wall surface and the inner wall surface of the guide rail so as to cover the other opposing inner wall surface of the snow case body A pair of sintered plates capable of discharging the vaporized gas fixed so as to be substantially flush with each other, and an exhaust pipe attached to the snow case body so as to cover the outer peripheral portions of the pair of sintered plates are connected. And a cover plate to be manufactured. 2. A machine frame, a cylindrical snow case fixed to the machine frame and capable of discharging molded dry ice to a lower portion, and an opening / closing lid for opening and closing a lower end portion of the snow case by an opening / closing device. A cylinder device for vertically moving a piston that moves vertically in the snow case attached to the machine frame, a carbon dioxide gas supply device for filling liquefied carbon dioxide gas in the snow case, and a downward opening by opening the opening / closing lid. A dry ice manufacturing apparatus comprising: a discharge mechanism for discharging molded dry ice to be discharged to the outside; wherein the machine frame is provided with a guide rail for guiding a square of the piston at a square portion of an inner wall of the snow case. And the inner wall surface and the inner wall surface of the guide rail so as to cover the inner wall surface near the upper part of the snow case main body. An upper inner wall plate having excellent wear resistance and corrosion resistance, such as stainless steel, fixed to be substantially flush with the inner surface, and an inner wall surface at a lower position of one of the opposed upper inner wall plates of the snow case body. A pair of Teflon plates having a liquefied carbon dioxide gas filling hole fixed so that the inner wall surfaces of the guide rails are substantially flush with the inner wall surface, and a lower portion of the other opposing upper inner wall plate of the snow case body. A pair of sintered plates capable of discharging vaporized gas fixed so that the inner wall surface and the inner wall surface of the guide rail are substantially flush with each other so as to cover the inner wall surface at a position, An apparatus for producing dry ice, comprising: a cover plate to which an exhaust pipe attached to the snow case body so as to cover an outer peripheral portion is connected. 3. A machine frame, a cylindrical snow case fixed to the machine frame and capable of discharging molded dry ice to a lower portion, and an opening / closing lid for opening and closing a lower end portion of the snow case by an opening / closing device. A cylinder device for vertically moving a piston that moves vertically in the snow case attached to the machine frame, a carbon dioxide gas supply device for filling liquefied carbon dioxide gas in the snow case, and a downward opening by opening the opening / closing lid. A dry ice manufacturing apparatus comprising: a discharge mechanism for discharging molded dry ice to be discharged to the outside; wherein the machine frame is provided with a guide rail for guiding a square of the piston at a square portion of an inner wall of the snow case. And the inner wall surface and the inner wall surface of the guide rail so as to cover the inner wall surface near the upper part of the snow case main body. An upper inner wall plate having excellent wear resistance and corrosion resistance, such as stainless steel, fixed to be substantially flush with the inner surface, and an inner wall surface at a lower position of one of the opposed upper inner wall plates of the snow case body. A pair of Teflon plates having a liquefied carbon dioxide gas filling hole fixed so that the inner wall surfaces of the guide rails are substantially flush with the inner wall surface, and a lower portion of the other opposing upper inner wall plate of the snow case body. A pair of sintered plates capable of discharging vaporized gas fixed so that the inner wall surface and the inner wall surface of the guide rail are substantially flush with each other so as to cover the inner wall surface at a position, A cover plate to which an exhaust pipe attached to the snow case body so as to cover an outer peripheral portion is connected, and the carbon dioxide gas supply device is provided inside the snow case. A pair of liquefied carbon dioxide gas filling holes formed near the one end of the pair of Teflon plates so that the filled liquefied carbon dioxide gas swirls, and the liquefied carbon dioxide gas filled from the pair of liquefied carbon dioxide gas filling holes, respectively. A liquefied carbon dioxide gas rotary supply nozzle attached to the snow case or the Teflon plate so as to supply gas in a rotating state; and a liquefied carbon dioxide gas cylinder for supplying liquefied carbon dioxide gas to the liquefied carbon dioxide gas rotary supply nozzle via a supply hose. An apparatus for producing dry ice, comprising: