KR100841550B1 - A dry ice spray equipment - Google Patents

Abstract

It is to provide a dry ice spraying device which can be carried out inexpensively with a simple configuration, and the liquefied carbon dioxide (L) in the gas introduction chamber (1) flows out through the orifice valve (2) into the gas expansion chamber (3), Dry ice particle D is produced | generated, and this dry ice particle D is sprayed together with the dew condensation prevention gas G from the front end of the injection container 5.

The gas fractionation part 4 is provided in the base terminal side of the said injection cylinder 5 downstream of the said gas expansion chamber 3, and the dry ice passage 6 and the gas passage in the said injection cylinder 5 are mentioned. (7) is partitioned.

The heating means 8 is closely arranged in the gas passage 7.

The mixed fluid of dry ice particles (D) and carbonic acid gas in the gas expansion chamber (3) is classified in the gas fractionation section (4), and the dry ice particles (D) are introduced into the dry ice passage (6). The above-mentioned condensation preventing gas (G) is generated by circulating the mixed fluid, which is included, and circulating the mixed fluid, which is circulated in the gas passage (7), by the heating means (8).

Description

Dry Ice Sprayer {A DRY ICE SPRAY EQUIPMENT}

The present invention relates to a dry ice injector for producing dry ice particles and injecting the dry ice particles together with the condensation preventing gas.

As this type of dry ice spray device, those disclosed in Utility Model Registration Publication No. 2557383 are known, for example, as shown in Figs.

6 is a vertical sectional view of the dry ice spray device according to the conventional example, and FIG. 7 is a piping diagram of the dry ice spray device.

This conventional example is connected to the first cylinder (B1) storing the liquefied carbonic acid gas (L) and the carbon dioxide gas introduction chamber (101a) by a pipeline, the second cylinder (B2) storing the nitrogen gas (N ₂ ) And nitrogen gas introduction chamber 101b are connected by pipeline, and liquefied carbon gas L introduced into carbon dioxide gas introduction chamber 101a is discharged into gas expansion chamber 103 via orifice 102 and dried. generate ice grain (D) and is configured to jet from the tip end of the dry ice particles (D) for gas expansion chamber 103, the injection tube 105 with a nitrogen gas (N ₂₎ introduced into.

In Fig. 6, reference numeral P denotes a pressure gauge, numeral S denotes an electromagnetic opening and closing valve, and numeral B3 denotes a buffer tank.

According to this dry ice spray device, the dry ice particles D can be sprayed together with the nitrogen gas N ₂ containing no water from the tip of the spray container 105 to prevent the formation of condensation on the workpiece. However, there is also room for improvement in the following points.

(1) In addition to the first cylinder B1 storing the liquefied carbon dioxide L, a second cylinder B2 storing the nitrogen gas N ₂ is required, and furthermore, the nitrogen gas outside the carbon dioxide gas introduction chamber 101a. A passage for introducing the introduction chamber 101b and the nitrogen gas N ₂ into the gas expansion chamber 103 is also required, and the configuration is complicated and the cost becomes high.

(2) The electromagnetic opening and closing valve S is opened to introduce the liquefied carbonic acid gas L into the carbon dioxide gas introduction chamber 101a, and the liquefied carbonic acid gas L is introduced into the gas expansion chamber 103 via the orifice 102. The dry ice particles D are generated, but the electromagnetic opening and closing valve S is required in addition to the configuration for controlling the opening of the orifice 102 (for example, a needle valve). And cost increases.

(3) In the above-described conventional example, dry ice particles D and nitrogen gas N ₂ are mixed in a sufficiently long gas expansion chamber 103 to spray the mixture. As the surrounding layer of nitrogen gas (N ₂ ) becomes thin, air containing moisture cannot be sufficiently blocked in the layer of nitrogen gas (N ₂ ), and the condensation prevention effect is not sufficient.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object thereof is to provide a dry ice spraying device which can be carried out inexpensively with a simple configuration and can effectively prevent condensation.

In order to solve the above problems, the present invention is configured as follows.

That is, the liquefied carbonic acid gas L in the gas introduction chamber 1 flows out into the gas expansion chamber 3 through the orifice valve 2 to generate dry ice particles D, and the dry ice particles D are removed. In the dry ice spray device configured to spray the condensation preventing gas (G) from the tip of the spray container (5), the gas fractionation part is downstream from the gas expansion chamber (3) toward the basic terminal side of the spray container (5). (4), the dry ice passage (6) and the gas passage (7) are formed in the injection cylinder (5), and the heating means (8) is arranged close to the gas passage (7), The mixed fluid of dry ice particles (D) and carbon dioxide gas in the gas expansion chamber (3) is sorted by the gas fractionation unit (4), and mixed with dry ice particles (D) in the dry ice passage (6). At the same time as distributing the fluid, the mixed fluid circulated in the gas passage (7) to the heating means (8) By heat is characterized in that is configured to generate the anti-condensing gas (G).

For example, as shown in Figs. 1 and 2, the liquefied carbon dioxide L in the gas introduction chamber 1 flows out into the gas expansion chamber 3 via the orifice valve 2 and dry ice particles D )                 

The mixed fluid of dry ice particles D and carbon dioxide gas in the gas expansion chamber 3 is classified in the gas fractionation section 4 and distributed to the dry ice passage 6 and the gas passage 7.

The mixed fluid including the dry ice particles D distributed through the gas passage 7 is heated by the heating means 8 disposed close to the gas passage 7 to form the condensation preventing gas G.

This condensation preventing gas (G) is injected from the tip of the injection cylinder (5) together with the dry ice particles (D) which have flowed through the dry ice passage (6) to prevent condensation of the object to be treated.

As a result, by using a single liquefied carbonic acid gas (L) to generate and spray dry ice particles (D) and condensation preventing gas (G), nitrogen gas (N ₂ ) or nitrogen as the condensation preventing gas (G) as in the conventional example. A passage for introducing the gas introduction chamber 101b and the nitrogen gas N ₂ into the expansion chamber 103 is also unnecessary, and can be carried out inexpensively with a simple configuration.

Moreover, since it is injected through a passage different from the dry ice particles D and the condensation preventing gas G, it is also possible to surround the dry ice particles D with the condensation preventing gas G, and thus Condensation on the workpiece can be effectively prevented.

For example, as shown in FIGS. 4A to 4B of FIG. 4, the dry ice injection value is close to the gas introduction chamber 1, the gas expansion chamber 3, and the gas fractionation unit 4. The heater 45 which is a fall prevention means can be arrange | positioned.

In this case, condensation prevention on the outer surface of the apparatus main body 11, adhesion of dry ice to the orifice valve 2, and freezing of trace moisture contained in carbon dioxide are prevented, and the production efficiency of dry ice particles D is increased. There is a number.                 

The dry ice spraying device is equipped with a guide cylinder 10 in the spray cylinder 5 to form the dry ice passage 6 in the guide cylinder 10, and at the same time, the guide cylinder 10 The gas passage 7 is formed in the periphery of the gas supply unit, and the charging unit 35 is additionally installed in the injection cylinder 5, and the charging unit 35 is inserted in the injection cylinder 5 inward. One disc-shaped electrode 36 is placed, and the discharge portion 37 formed in the inner circumferential portion of the disc-shaped electrode 36 is interviewed with the gas passage 7 described above. It can arrange | position to the said guide cylinder 10 which comprises an electrode.

In this case, for example, as shown in Fig. 3, one of the disk-shaped electrodes 36 constituting the charging means 35 is sandwiched in the injection cylinder 5 inward, and the disk-shaped electrodes 36 The discharge part 37 formed in the inner circumferential portion of the c) is arranged to face the gas passage 7 and face the above-described guide cylinder 10 constituting the other electrode. The blocking gas G is ionized.

The ionized condensation preventing gas (G) removes the charges of the injected dry ice particles (D) and at the same time increases the flow rate and the charge density.

The increased charge density also removes charge from the static charge that occurs when the dry ice particles (D) collide with the object.

In addition, according to the above-described configuration, the high-pressure charging means 35 can be accommodated in the injection cylinder 5 to be configured safely and compactly.

In addition, the present invention flows the liquefied carbon dioxide (L) in the gas introduction chamber (1) into the gas expansion chamber (3) through the orifice valve (2) to produce dry ice particles (D), the dry ice particles In the dry ice spray device configured to inject (D) from the tip of the spray container 5, the partition wall 20 between the gas introduction chamber 1 and the gas expansion chamber 3 is used for the orifice valve 2 described above. The orifice hole 21 opened in the valve, a valve rod 22 which is inserted into the orifice hole 21 so that the orifice hole 21 can be opened and closed so that the orifice hole 21 can be adjusted, and the valve rod 22 is opened. The valve closing spring 24 added to the closing side, the stopper 25 for setting the valve opening amount by regulating the retracted position of the valve rod 22 to be adjustable, and the valve rod 22 described above. It is characterized by comprising a valve opening operation means 26 for opening the valve against the valve closing spring (24). The.

In this case, for example, as shown in Figs. 1 and 2, the liquefied carbon dioxide L in the gas introduction chamber 1 flows out into the gas expansion chamber 3 via the orifice valve 2 to dry ice particles ( D)

The opening degree of the orifice hole 21 opened in the partition wall 20 between the gas introduction chamber 1 and the gas expansion chamber 3 is inserted into the orifice hole 21 in the valve rod 22 so as to be adjustable. Adjust it.

That is, the retracting position of the valve rod 22 is regulated to be adjustable by the stopper 25 to set the valve opening amount of the orifice valve 2.

According to this structure, the valve opening 22 is operated by the valve opening operation means 26 to the position which is regulated by the stopper 25 against the valve closing spring 24, and the desired valve opening amount is instantaneously. You can open it all.

For example, as shown in FIG. 1, the dry ice injection device is a driven rod which is formed integrally with the valve rod 22 and coaxially with the valve rod 22, and is provided to be retractable. 23), the drive rod 27 provided in parallel with the said driven rod 23, and removably installed, the driven rack 23a formed in the said driven rod 23, and the said drive rod 27 And a pinion gear 28 engaged with the drive rack 27a formed therein, and a manual operation lever 29 for advancing and retracting the drive rod 27 in an adjustable manner.

In this case, since the electromagnetic opening and closing valve S is not required as in the prior art, it can be carried out inexpensively with a simple configuration.

Moreover, it is extremely convenient because the valve opening amount can be appropriately adjusted as necessary within the range regulated by the stopper 25 by the manual operation lever 29.

For example, as shown in Fig. 1, the dry ice spraying device is provided with a spring force setting means 16 for setting the valve closing force of the valve closing spring 24 to be adjustable. In the position located in the gas introduction chamber 1 of the driven rod 23, the pressure step part 23b which adds the driven rod 23 to the valve opening side by gas pressure is formed, and the said valve closing spring is made. The orifice valve 2 can be configured to function as a safety valve by opposing the valve closing force of (24) and the valve opening force due to gas pressure.

In this case, when the gas pressure in the gas introduction chamber 1 rises and the pressure received by the hydraulic pressure step 23b exceeds the valve closing force of the valve closing spring 24 described above, the liquefied carbonic acid gas L is It flows out through the orifice hole 21 into the gas expansion chamber 3, and is discharged out of the machine of the present invention through the dry ice passage 6 and the gas passage 7.

As a result, the orifice valve 2 functions as a safety valve because the valve closing force of the valve closing spring 24 and the valve opening force due to gas pressure are opposed.

1 shows a dry ice injection value according to the present invention,

Fig. 1A is a longitudinal sectional view of the dry ice spray device,

FIG. 1B is a longitudinal sectional view taken along the line A-A in FIG. 1A.

2 shows a main part of the dry ice spray device,

Fig. 2A is a longitudinal sectional view of the fractionation part of the dry ice spray device described above;

FIG. 2B is a longitudinal sectional view taken along line B-B in FIG. 2A;

3 shows a main part of the above-mentioned dry ice spray device,

Fig. 3A is a longitudinal sectional view of the injection cylinder portion in Fig. 1A;

3B is a longitudinal sectional view taken along line C-C of the charging means in FIG. 3A;

3C is an equivalent view of FIG. 3B according to Modification Example 1 of the charging means, FIG.

Fig. 3D is an equivalent view of Fig. 3B regarding Modification Example 2 of the charging means.

4A and 4B illustrate an arrangement of the temperature lowering prevention means and the like mounted in the apparatus body of the dry ice spray device, and FIG. 4A is an outline view of the apparatus body, and FIG. 4B is a line BB in FIG. 4A. Cross Section,

5A and 5B show a modified arrangement example of the dry ice passage, the gas passage and the heating means of the above-described dry ice apparatus, FIG. 5A shows the equivalent degree of FIG. 1B according to the modified arrangement example 1, and FIG. 5B shows a modified arrangement example Fig. 1B corresponds to Fig. 2B.

6 and 7 show a conventional example, FIG. 6 is a vertical sectional view of the dry ice spray device, and FIG. 7 is a piping diagram of the dry ice spray device.

Explanation of symbols on the main parts of the drawings

1: gas introduction chamber 2: orifice valve 3: gas expansion chamber

4: gas fractionation part 5. spray container 6: dry ice passage

6a: central passage 7: gas passage 7a: peripheral passage

8: Heating means 9: Gas chamber inner hole 10: Guide tube

11: apparatus main body 12: handle portion 13: communication path

14: gas introduction pipe 15: flange 16: spring spring tool

17a, 17b: Fixing screw 18: Fine spring 19: Rod mounting hole

20: bulkhead 21: orifice hole 22: valve rod

23a: driven rack 23b: hydraulic pressure step 24: valve closing spring

25: stopper 26: valve opening operation means 27: drive rod

28: pinion gear 29: manual override lever 30: closing valve

31: sorting receptor 32: heating container 33: sorting mechanism

34: temperature control device 35: charging means 36: disk-shaped electrode

37: discharge portion 38: electrode conductive 39: insulator

40: conductive terminal 41, 42: conductive wiring 43: ground terminal

44: electrode terminal 45: heater 46: heater mounting hole                 

47: temperature control mounting hole

L (CO ₂ ): liquefied carbon dioxide (N2): nitrogen gas G: nitrogen prevention gas

D: Dry ice particles S: Electronically closed valve P: Pressure gauge

As shown in Fig. 1, the dry ice spraying device includes an apparatus body 11 which accommodates a gas introduction chamber 1, an orifice valve 2, a gas expansion chamber 3, and a gas fractionation section 4 in series; And a spray cylinder (5) provided coaxially with the apparatus body (11), and a handle portion (12) for supporting the apparatus body (11) to form a pistol.

In the handle portion 12, a gas introduction pipe 14 to be described later, a conductive terminal 40, a conductive wiring 41, 42 and a ground terminal 43 for the heating means 8 are additionally arranged. It is.

Further, the conductive terminals 40 and the conductive wirings 41 and 42 of the charging means 36 described later are additionally arranged.

As shown in FIG. 1, this dry ice spraying device causes the liquefied carbon gas L in the gas introduction chamber 1 to flow out into the gas expansion chamber 3 through the orifice valve 2, thereby allowing the dry ice particles D to flow. And a dry ice passage in which the mixed fluid of the dry ice particles (D) and the carbon dioxide gas is divided into two in the gas fractionation section (4) and one mixed fluid is formed in the shaft center portion of the injection cylinder (5) ( 6), and the other mixed fluid is distributed to the normal gas passage 7 formed around the dry ice passage 6 described above, and the mixed fluid distributed to the gas passage 7 is passed through the gas cylinder. The condensation preventing gas G is heated by the heating means 8 disposed close to the furnace 7 to generate the condensation preventing gas G, and the dry ice particles D which are circulated through the dry ice passage 6 are subjected to the condensation preventing gas G described above. ) Is jetted from the tip of the jetting cylinder 5.

As shown in FIG. 1, the gas introduction chamber 1 is formed in the center part of the front and rear direction of the apparatus main body 11, and this gas introduction chamber 1 is connected to the above-mentioned handle part via the communication path 13. 12 is in communication with the gas introduction pipe 14 of the liquefied carbon dioxide L contained therein.

As shown in FIG. 2, the orifice valve 2 includes an orifice hole 21 opened in the partition wall 20 between the gas introduction chamber 1 and the expansion chamber 3, and the orifice hole. The tapered valve rod 22 having a tapered end that can be inserted into and retracted from the opening and closing the orifice hole 21, and the valve rod 22 is pushed through the driven rod 23 to the valve closing side. The valve closing spring 24 described above, the stopper 25 for setting the valve opening amount by regulating the retracted position of the valve rod 22 to be adjustable, and the valve closing spring described above. It is comprised by the valve opening operation means 26 which operates a valve opening against 24.

The valve closing spring (24) is screwed to the flange (15) mounted to the rear of the driven rod (23) and the rear of the apparatus main body (11), and the spring tool for constituting the spring force setting means. It is constructed between (16), and it is comprised so that the above-mentioned spring holding tool 16 may be advanced-adjusted and the valve closing force of the valve closing spring 24 may be adjusted.

The stopper 25 is screwed onto the driven rod 23 and the spring-loaded tool 16 so as to be concentric, and regulates the retracted position of the driven rod 23 so that the valve rod ( It is configured to set the valve opening amount of 22).

In addition, the code | symbol 17a and 17b has shown the fixing screw which fixes the spring-loading tool 16 and the stopper 25, respectively.

The valve opening operation means 26 is integrally formed coaxially with the valve rod 22 and is installed in parallel with the driven rod 23 and the driven rod 23 which are installed to be able to move forward and backward. And a pinion gear 28 engaged with the drive rod 27, the driven rack 23a formed on the driven rod 23, and the drive rack 27a formed on the drive rod 27. And a manual operation lever 29 for retractably positioning the drive rod 27 against the valve closing spring 24, and the orifice valve 2 is moved to the manual operation lever 29. It is comprised so that valve may open in one instant.

In addition, in this embodiment, the provisional spring 18 which adds the above-mentioned driving rod 27 to the valve closure side other than the valve closure spring 24 is provided, but this provisional spring 18 may be omitted.

According to the above structure, the liquefied carbon dioxide L in the gas introduction chamber 1 flows into the gas expansion chamber 3 via the orifice valve 2 to generate dry ice particles D. As shown in FIG.

The opening degree of the orifice hole 21 opened in the said partition 20 is adjusted by inserting the valve rod 22 in this orifice hole 21 so that advancing position can be adjusted.

That is, the valve opening amount of the orifice valve 2 is set by restricting the retracted position of the driven rod 23 formed coaxially and integrally with the valve rod 22 so that the retractable position can be adjusted by the stopper 25. do.                 

Then, by opening the valve 23 to the position regulated by the stopper 25 against the valve closing spring 24 by the valve opening operation means 26, the desired valve opening amount is immediately opened. You can do it.

As a result, since the electromagnetic opening and closing valve S as in the conventional example is not required, it can be carried out inexpensively with a simple configuration.

Moreover, it is extremely convenient because the valve opening amount can be appropriately adjusted by operating with the manual operation lever 29 described above within the range regulated by the stopper 25.

The insertion hole 27b of the driving rod 27 is closed by the closing valve 30. However, the closing valve 30 allows the rear end of the driving rod 27 to be adjustable in position. By canceling the valve closing force of the closing spring (24), the orifice hole (21) can be opened by an appropriate amount, so that the above-mentioned mixed fluid can be distributed in the gas passage (7) by an appropriate amount.

In that case, the said closing valve 30, the drive rod 27, the pinion gear 28, and the driven rod 23 function as an overheat prevention means of the said heating means 8, for example.

As shown in Figs. 1A and 2B, at the tip end of the apparatus main body 11, a fractionation receiver 31 having the gas fractionation part 4 is screwed in, and the gas fractionation part 4 is described above. ) Is configured by screwing the fractionation mechanism 33 into the fractionation receptor 31 above the gas expansion chamber 3 via a predetermined interval.

As shown in Figs. 2A and 2B, the sorting mechanism 33 forms a central passage 6a at the shaft center, three peripheral passages 7a at the periphery, and the gas sorting portion 4 described above. The above-described mixed fluids classified in this section are configured to distribute these central passages 6a and peripheral passages 7a.

Adjusting the screw tightening position of the sorting mechanism 33 to adjust the distance between the sorting mechanism 33 and the gas expansion chamber 3 to distribute the central passage 6a and the peripheral passage 7a. The classification ratio can be set appropriately.

In connection with this, when the distribution speed of the dry ice particles D is increased or the cleaning power by the dry ice particles D is increased, the fractionation ratio to the central passage 6a is increased.

Moreover, when improving the sealing property of the dry ice particle D by the dew condensation prevention gas G, the fractionation ratio of the peripheral passage 7a is made large.

As shown in FIG. 1A and FIG. 1B, the above-mentioned sorting part receptor 31 is formed with coaxial and one-piece heating part receiving cylinder 32, and this heating part receiving container 32 is the above-mentioned injection cylinder 5 Is housed inside.

Cylindrical guide cylinder 10 is coaxially mounted in this heating part container 32, and this guide cylinder 10 is coaxially and in series with the said sorting mechanism 33 as shown to FIG. 2A. Is connected.

In the guide passage 10, a dry ice passage 6 is formed in series with the central passage 6a, and at the same time, a general gas passage (12) which is connected to the peripheral passage 7a in succession thereof ( 7) is formed.

Moreover, the heating means 8 is arrange | positioned near the outer side of the said gas path 7 in this heating part accommodation cylinder 32. As shown in FIG.

In addition, as shown in Fig. 1A and Fig. 1B, a temperature regulating device 34 is placed in the lower space of the above-mentioned heating part container 32, and the heating temperature by the heating means 8 is constantly adjusted. It is configured to.

According to the above configuration, the mixed fluid containing the dry ice particles (D) is classified into two in the gas fractionation section (4), and one mixed fluid is formed in the dry ice passage formed in the shaft portion in the injection barrel (5). 6) and the other mixed fluid distributes the gas passage (7), and the mixed fluid flowing through the gas passage (7) is heated by a heating means (8) arranged in close proximity to prevent condensation gas (G). ), And the surroundings of the dry ice particles (D) in which the dry ice passage (6) has been distributed are surrounded by the above-mentioned condensation preventing gas (G) and injected from the tip of the injection cylinder (5).

As a result, the surface of the object to be treated is cleaned or scaled with the dry ice particles D, and the dry ice particles D are surrounded by the condensation preventing gas G to surround the dry ice particles D. It is isolated from moisture-containing air and blows moisture-containing air with condensation prevention gas heated in parallel to prevent condensation on the object.

In addition, condensation due to the temperature drop of the object can be prevented by keeping the object to be treated with the heated condensation preventing gas G.

According to the above configuration, since the mixed fluid containing the dry ice particles D in the gas expansion chamber 3 is classified in the gas fractionation section 4, the dry ice particles using a single liquefied carbonic acid gas L are used. By generating and spraying condensation preventing gas (G), a passage for introducing nitrogen gas, nitrogen gas introduction chamber and nitrogen gas as gas condensation preventing gas as in the conventional example into the gas expansion chamber becomes unnecessary, and it is cheap in a simple configuration. You can do it.

In addition, it is preferable to increase the heating efficiency of the gas flowing through the gas passage 7 by increasing the passage wall area of the gas passage 7.

For example, the passage may be formed by a spiral or a female screw, or the residence time of the gas in the passage may be increased.

Fig. 3 shows a main part of a dry ice spray device according to the present invention, Fig. 3A is a longitudinal sectional view of the injection cylinder portion in Fig. 1A, and Fig. 3B is a longitudinal sectional view along the C-C line of the charging means 35 in Fig. 3A.

As shown in FIG. 3A and FIG. 3B, the charging means 35 is attached to the front end side of the above-mentioned injection cylinder 5. As shown in FIG.

The charging means 35 has one disk-shaped electrode 36 which is inserted inwardly into the above-described injection cylinder 5, and has three chambers formed in the inner circumferential portion of the disk-shaped electrode 36. As shown in FIG. The whole 37 is interviewed with the above-described gas passage 7 so as to face the above-described guide cylinder 10 constituting the other electrode, and for example, about 5000V is loaded to generate corona discharge. It is.

The guide cylinder 10 constituting the other electrode is screwed to the sorting receptor 31 via the sorting mechanism 33 as shown in FIG. 3A, and the sorting receptor 31 is described above. It is electrically connected via the electrode terminal 44 connected to the through and the sorting mechanism 33.                 

Reference numeral 38 in Fig. 3B denotes an electrode lead, and reference numeral 39 denotes an insulator.

According to the above structure, the classified condensation preventing gas (G) removes the static charge of the injected dry ice particles (D) and at the same time increases the flow rate and the charge density.

The increased charge density also removes charge from the static charge generated when the dry ice particles D collide with the object.

In addition, according to the above-described configuration, the voltage charging means 35 can be accommodated in the injection cylinder 5 so that it can be configured safely and compactly.

3C is an equivalent view of FIG. 3B according to Modification Example 1 of the charging means.

In this modified example 1, instead of the three discharge parts 37 described above, a plurality of discharge parts 37 are interviewed with the gas passages 7 described above, and are arranged to face the guide cylinders 10.

3D is a diagram corresponding to FIG. 3B according to Modification Example 2 of the charging means.

In this modified example 2, instead of the plurality of discharge parts 37 described above, the blade-shaped discharge parts 37 are interviewed with the gas passages 7 in a vertical cross-sectional view as viewed from the front, and the guide tube ( 10) is placed opposite.

Also in the above-described modifications 1 and 2, the same effects and effects as in the embodiment of FIG. 3B are exhibited.

4A and 4B illustrate an arrangement of the temperature lowering prevention means and the like installed in the apparatus main body 11, FIG. 4A is an outline view of the apparatus main body 11, and FIG. 4B is a line BB in FIG. 4A. Vertical cross section according to.                 

As shown in Figs. 4A and 4B, the apparatus body 11 includes a gas chamber containing hole 9 containing a gas introduction chamber 1, a gas expansion chamber 3, and a gas fractionation section 4, and A rod mounting hole 19 for mounting one drive rod 27, a pair of left and right heater mounting holes 46 and 46 and a temperature adjusting device mounting hole for mounting a heater 45 as a temperature lowering means ( 47) is formed.

The heater 45, which is the pair of temperature lowering prevention means, is close to the lower side of the gas chamber inner bore 9, and the gas introduction chamber 1, the gas expansion chamber 3, and the gas fractionation section 4 are provided. It is arranged in such a length that it prevents the temperature drop of the apparatus main body 11, prevents condensation of the outer surface, adheres dry ice to the orifice valve 2, and prevents freezing of trace moisture contained in carbon dioxide. It is intended to increase the production efficiency of the ice particles (D).

Fig. 5 shows a modified arrangement example of the dry ice passage 6, the gas passage 7 and the heating means 8 described above.

FIG. 5A is a diagram corresponding to FIG. 1A according to the modification arrangement example 1. In this modification arrangement example 1, the dry ice passage 6 and the gas passage 7 are provided in the heating part accommodating cylinder 32, and the gas passage described above. A plurality of heating means 8 are arranged in close proximity to (7).

FIG. 5B is a diagram corresponding to FIG. 1B according to the modification arrangement example 2. In this modification arrangement example 2, a single dry ice passage 6 is formed in the central portion of the heating part accommodating cylinder 32. Two gas passages 7 are arranged above and below (6), and a plurality of heating means 8 are arranged in close proximity to each gas passage 7.

Also in the modified batch 1 and the modified batch 2, the mixed fluid containing the dry ice particles (D) is classified into two in the gas fractionation section 4, and one mixed fluid is the dry ice passage 6 described above. ), And the other mixed fluid distributes the gas passage (7), and the mixed fluid flowing through the gas passage (7) is heated by the heating means (8) arranged in close proximity to prevent condensation gas ( G), it is injected from the tip of the injection cylinder 5 together with the dry ice particles D which have flowed through the dry ice passage 6.

As a result, the surface of the object to be treated is cleaned or scaled with dry ice particles, and condensation of the object is prevented by the above-mentioned condensation preventing gas G.

In addition, this invention is not limited to the above-mentioned embodiment, For example, the following various design changes can be performed in the range which does not change the summary of this invention.

(1) Since the heating means 8 only needs to heat and gasify the dry ice particles D contained in the mixed fluid circulating in the gas passage 7, an example of the heating means 8 may be used. For example, even if the fin etc. which heat | suck and heat-exchange heat, such as normal temperature outside air, are arrange | positioned close to the gas path 7, there is no problem.

(2) The above-mentioned guide cylinder 10 is not limited to a cylindrical one, and even if it is a polygonal thing, it does not interfere.

In addition, the position of the charging means 35 is not limited to the front end side of the injection cylinder 5, The power supply of the charging means 35 is not limited to direct current.

(3) The valve opening and closing means 26 can be used instead of the manual control lever 29, for example, by using an electromagnetic opening and closing valve.

It is to provide a dry ice spraying device which can be carried out inexpensively with a simple configuration. The liquefied carbon dioxide (L) in the gas introduction chamber (1) flows out through the orifice valve (2) into the gas expansion chamber (3), and the dry ice Particles (D) are produced and the dry ice particles (D) are sprayed together with the condensation preventing gas (G) from the tip of the injection cylinder (5).

Claims (6)

The liquefied carbon dioxide (L) in the gas introduction chamber (1) flows out through the orifice valve (2) into the gas expansion chamber (3) to produce dry ice particles (D), and prevents the dry ice particles (D) from condensation. In the dry ice spraying device configured to inject the gas G together from the tip of the spray container 5, the gas fractionation unit (3) is downstream from the gas expansion chamber 3 to the base terminal side of the spray container 5. 4), the dry ice passage 6 and the gas passage 7 are partitioned in the injection passage 5, and the heating means 8 are placed in close proximity to the gas passage 7, The mixed fluid of dry ice particles (D) and carbon dioxide gas in the gas expansion chamber (3) is sorted by the gas fractionation section (4), and mixed with dry ice particles (D) in the dry ice passage (6). At the same time as distributing the fluid, the mixed fluid circulated in the gas passage 7 to the heating means 8 Heat to a dry ice injection device, characterized in that is configured to generate the anti-condensation gas (G). The method of claim 1, And a temperature lowering prevention means (45) in close proximity to the gas introduction chamber (1), the gas expansion chamber (3), and the gas fractionation section (4). The method according to claim 1 or 2, The guide cylinder 10 is mounted in the injection cylinder 5 to form the dry ice passage 6 described above in the guide cylinder 10, and the gas cylinder described above around the guide cylinder 10. The furnace 7 is formed, and the charging means 35 is additionally installed in the injection cylinder 5, and the charging means 35 is inserted into the injection cylinder 5 inward. The above-described electrode having a disk-shaped electrode 36 and having a discharge portion 3 formed in the inner circumferential portion of the disk-shaped electrode 36 being interviewed with the gas passage 7 to form the other electrode. Dry ice spray device, characterized in that disposed opposite the guide tube (10). The liquefied carbon dioxide (L) in the gas introduction chamber (1) flows out into the gas expansion chamber (3) via the orifice valve (2) to produce dry ice particles (D), and the dry ice particles (D) are injected into the spray container. In the dry ice spray device configured to spray from the tip of (5), the orifice hole opened in the partition wall 20 between the gas introduction chamber 1 and the gas expansion chamber 3 is used for the orifice valve 2. (21), a valve rod (22) which is inserted into the orifice hole (21) so as to be retractable, and which opens and closes the orifice hole (21) so as to be adjustable, and a valve block which adds the valve rod (22) to the valve closing side. A valve closing spring (24) in which the spring (24), the stopper (25) for regulating the retracted position of the valve rod (22) so as to be adjustable, and the valve opening amount are set, and the valve rod (22) described above. Dryer comprising a valve opening operation means 26 for opening the valve against the Ejection device. The method of claim 4, wherein The valve opening operation means 26 is formed integrally with the valve rod 22 coaxially with the valve rod 22, and is provided in parallel with the driven rod 23 and the driven rod 23. A pinion gear 28 engaged with a drive rod 27 removably provided, a driven rack 23a formed in the driven rod 23, and a drive rack 27a formed in the drive rod 27. And a manual operation lever (29) which adjusts and retracts the drive rod (27) in an adjustable manner. The method of claim 4, wherein While installing the spring force setting means 16 for setting the valve closing force of the valve closing spring 24 to be adjustable, the gas pressure is provided at a position located in the gas introduction chamber 1 of the driven rod 23. By means of forming a hydraulic pressure step 23b for adding the driven rod 23 to the valve opening side, thereby counteracting the valve closing force of the valve closing spring 24 and the valve opening force due to gas pressure. A dry ice spray device characterized in that the orifice valve (2) is configured to function as a safety valve.

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