KR20220095765A - Dry sand manufacturing and spraying device - Google Patents

Abstract

The present invention relates to a dried sand manufacturing and spraying apparatus. The dried sand manufacturing and spraying apparatus according to one embodiment of the present invention comprises: a hopper into which sand is injected; a sand spraying module which sprays dried sand; a transport module which transports the sand injected through the hopper toward the sand spraying module; and a heating module which heats and dries the sand being transported in the transport module. According to the present invention, sufficient quantities of the dried sand to extinguish a metal fire can be procured locally regardless of a sand condition surrounding a metal fire site. In addition, the present method of on-site procurement of the dried sand eliminates a need for the dried sand to be produced and stored in advance. Thus, a means and a cost for storing the pre-produced dried sand are reduced.

Description

Dry sand manufacturing and spraying device

The present invention relates to an apparatus for manufacturing and spraying dry sand, and more particularly, when sand is put into a hopper, it is heated and dried in the process of transferring the sand to a sand blasting module to produce and spray dry sand directly at the site of a metal fire. It relates to a drying yarn manufacturing and spraying device that makes it possible.

As is known, fire is an oxidation phenomenon that burns rapidly, and it means a combustion phenomenon that is necessary for extinguishing caused by arson or expanding against human intention. In Korea, fires are usually classified into Class A fires, Class B fires, Class C fires, and Class D fires depending on the cause and ignition material, and the extinguishing method of these fires varies according to the classification.

Class A fire refers to a general fire, specifically, a fire caused by setting fire to a general combustible object such as wood or paper. Most of the fires fall under this class A fire, and the most reliable means of extinguishing are removal of toxic substances, lowering the temperature by spraying water, or blocking oxygen.

Class B fires refer to oil fires. Specifically, fires caused by burning oil due to gas station fires or tank overturning accidents are classified as Class B fires. Oil floats on water, so if you try to extinguish it with water, the fire spreads rather than extinguishes. Therefore, sand or a fire extinguisher is usually used as a means of extinguishing a Class B fire, and water is not used. Of course, Class B fires caused by flammable liquids heavier than water can be extinguished using water, and Class B fires can be extinguished with water dissolved in surfactant.

Class C fires refer to electric fires. Specifically, fires caused by fires caused by fires caused by short circuits or short circuits are classified as Class C fires. Electric fires should not use water either. This is because it can cause an electric shock and increase the possibility of a fire as electricity flows through the water. However, after the electricity supply is cut off, the fire can be extinguished in the same way as the Type A fire, and it is also possible to extinguish the fire using water.

Class D fire means rapid fire, and it means fire caused by highly reactive alkali metals such as lithium, sodium, potassium, cesium, and magnesium. In extinguishing such a Class D fire, water as well as a conventional fire extinguisher cannot be used. In particular, when water is used to extinguish a metal fire, special attention should be paid to the generation of hydrogen through a chemical reaction, which may cause a hydrogen explosion.

Special fire extinguishers for metal fires can be used or sand can be used to extinguish these metal fires. In particular, in the case of sand, since it is easily available in the vicinity, firefighters often use sand to quickly extinguish fires.

However, when using sand as a means of extinguishing a metal fire, if wet sand containing more than a predetermined amount of moisture is used, an explosion may occur due to the moisture in the wet sand.

Accordingly, a device for manufacturing dry sand by drying sand, such as the 'sand drying device' of Korean Patent Registration No. 10-1004048, has been developed. However, it is inefficient in terms of efficiency to always prepare and store dry sand prepared using such a device, and then transport and use a sufficient amount of dry sand to a metal fire site for fire extinguishing, and dry sand at a metal fire site. Procurement has limitations.

Republic of Korea Patent Registration No. 10-1004048

The present invention is to solve the problems of the prior art mentioned above, and an object of the present invention is to heat and dry the sand in the process of transferring the sand to the sand blasting module when the sand is put into the hopper, so that it can be used in a metal fire site. An object of the present invention is to provide a dry sand manufacturing and spraying device capable of directly manufacturing and spraying dry sand.

Another object of the present invention is to provide a dry sand manufacturing and spraying device capable of improving metal fire extinguishing efficiency by separating heated and dried sand according to the volume and spraying only dry sand less than a predetermined volume among the separated dry sand will be.

Another object of the present invention is to provide a fan for discharging dry sand of a predetermined volume or more among the dry sand separated according to the volume to the outside and blowing wind toward the dry sand discharged to the outside so that the separated and discharged sand is located at a specific location It is to provide a drying sand manufacturing and spraying device to prevent excessive accumulation in the.

An apparatus for manufacturing and spraying dry sand according to an embodiment of the present invention includes a hopper into which sand is put, a sand spray module for spraying dry sand, a transfer module for transferring sand input through the hopper toward the sand spray module, and It includes a heating module for heating and drying the sand being transported in the transport module.

In this case, the heating module may include a transfer heating wire disposed to surround the circumference of the transfer module.

In addition, the dry sand manufacturing and spraying apparatus may further include a separation module for separating the dry sand transferred by the transfer module according to a volume and supplying the separated dry sand less than a predetermined volume to the sand spraying module.

In addition, the separation module includes a separation net that is disposed so that the dry sand transferred from the transfer module is seated on the upper side and passes dry sand less than a predetermined volume among the settled dry sand to the lower side, and the dry sand less than a predetermined volume that has passed through the separation net It may include a guide plate disposed below the separation net to be seated and inclined downward at a predetermined angle toward the sand blasting module so that the settled dry sand is transferred and supplied to the sand blasting module.

In addition, the separation net is formed to be inclined at a predetermined angle so that dry sand of a predetermined volume or more that has not passed downward falls from one side and is discharged to the outside, and the separation module may include a vibration module for generating vibrations in the separation net and the guide plate. .

In addition, the separation module may be provided with a fan that blows the wind toward the drop point where the dry sand of a predetermined volume or more discharged to the outside falls.

According to the present invention, when sand is put into the hopper, the sand is heated and dried in the process of transferring it to the sand blasting module, so that dry sand can be produced and sprayed directly at the metal fire site, thereby improving the state of the sand around the metal fire site. Regardless, a sufficient amount of dry sand required for extinguishing metal fires can be locally procured, and this dry sand local procurement method eliminates the need for pre-production and storage of dry sand, providing a means for storing pre-produced dry sand and It has the effect of reducing costs.

In addition, the present invention can improve the metal fire extinguishing efficiency by separating the heated and dried sand according to the volume and spraying only the dry sand less than a predetermined volume among the separated dry sand.

In addition, the present invention is provided with a fan for discharging the dry sand of a predetermined volume or more among the dry sand separated according to the volume to the outside and generating a wind toward the discharged dry sand to the outside, so that the separated and discharged sand is excessively accumulated at a specific location By preventing it, there is an effect of preventing the excessively accumulated discharged sand from forming an obstacle and interfering with the fire suppression operation.

1 is a view showing a schematic view of a drying yarn manufacturing and spraying apparatus according to an embodiment of the present invention.
Figure 2 is a view showing a schematic appearance of a hopper according to an embodiment of the present invention.
3 is a view showing a schematic view of a transfer module and a heating module according to an embodiment of the present invention.
4 is a diagram schematically illustrating a separation module and a sand blasting module according to an embodiment of the present invention.
5 is a diagram illustrating a state in which sand of a predetermined size or larger is separated and discharged from the sand blasting module according to an embodiment of the present invention.
FIG. 6 is a view showing the operation of the fan of the sand blasting module according to an embodiment of the present invention.
7 is a functional block diagram of a drying yarn manufacturing and spraying device according to an embodiment of the present invention.

It should be noted that the technical terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. In addition, the technical terms used in the present invention should be interpreted as meanings generally understood by those of ordinary skill in the art to which the present invention belongs, unless otherwise specifically defined in the present invention, and excessively comprehensive It should not be construed in the meaning of a human being or in an excessively reduced meaning. In addition, when the technical term used in the present invention is an incorrect technical term that does not accurately express the spirit of the present invention, it should be understood by being replaced with a technical term that can be correctly understood by those skilled in the art.

Also, the singular expression used in the present invention includes the plural expression unless the context clearly dictates otherwise. In the present invention, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the various components or various steps described in the invention, some of which components or some steps are included. It should be construed that it may not, or may further include additional components or steps.

In addition, it should be noted that the accompanying drawings are only for easy understanding of the spirit of the present invention, and should not be construed as limiting the spirit of the present invention by the accompanying drawings.

Hereinafter, a drying yarn manufacturing and spraying device according to the present invention will be described in more detail with reference to the accompanying drawings.

1 is a view showing a schematic view of a drying yarn manufacturing and spraying apparatus according to an embodiment of the present invention.

Dry sand manufacturing and spraying device (hereinafter referred to as 'drying spraying device') according to an embodiment of the present invention is characterized in that it is possible to directly manufacture and spray dry sand at the site of a metal fire.

To this end, the dry sand blasting device according to the present embodiment includes a hopper 10 for putting sand, a transport module 20 for transporting sand put into the hopper 10 toward the sand blasting module 50 , and sand A heating module 30 for drying the sand transferred to the spray module 50, and a separation module for separating dry sand less than a predetermined volume from the dry sand transferred from the transfer module 20 and supplying it to the sand spray module 50 ( 40 ), and a sand spray module 50 for spraying dry sand supplied from the separation module 40 .

More specifically, referring to FIG. 1 , the surrounding sand is put into the hopper 10 . At this time, since the input sand goes through a drying process, any sand can be put in regardless of the moisture content.

The transfer module 20 may form a transfer path of a predetermined length arranged in a horizontal direction with the ground. The hopper 10 is disposed at the upper end of one side of the transfer module 20 , and the sand passing through the hopper 10 may be introduced into one side of the transfer module 20 . The transfer module 20 transfers the sand introduced from one side to the separation module 40 disposed below the other side along the transfer path, and in this process, the transferred sand may be dried.

Specifically, the heating module 30 for heating and drying sand so that the sand is dried while being transported along the transport module 20 may be disposed to surround a partial section of the transport module 20 . That is, the sand transferred along the transfer module 20 toward the sand blasting module 50 may be dried by the heat generated by the heating module 30 surrounding the transfer module 20 .

When the sand heated and dried by the heating module 30 during transport is transferred to the separation module 40, the separation module 40 separates the transferred dry sand by volume, and discharges the dry sand of a predetermined volume or more to the outside. Less than a volume of dry sand may be supplied to the sandblasting module 50 . The sand spray module 50 may spray the supplied dry sand. Specifically, the sand spraying module 50 may spray dry sand together with the compressed air by generating compressed air and spraying the generated compressed air to the outside.

According to such a configuration, the present invention can directly produce dry sand using sand around a metal fire site without preparing separate dry sand and immediately spray the prepared dry sand. Therefore, the dry sand spraying device according to this embodiment can locally procure a sufficient amount of dry sand required for extinguishing a metal fire regardless of the sand state (humidity) around the metal fire site. In addition, this local procurement method of dry sand does not need to produce and store dry sand in advance, so it is effective to reduce the means and cost for storing the dry sand produced in advance.

2 is a view showing a schematic appearance of a hopper according to an embodiment of the present invention.

As described above, sand is put into the hopper 10 , and the sand put into the hopper 10 may be introduced into one side of the transfer module 20 .

Referring to FIG. 2 in detail, the hopper 10 is formed with an open bottom so that the input sand can be discharged to the lower side. At this time, a gate valve 11 may be disposed at the lower end of the hopper 10 to control the amount of sand discharged downward. The gate valve 11 can control the degree of opening of the lower end of the hopper 10 and can control the amount of sand discharged through this. In addition, the gate valve 11 may be manually operated by a user or may be automatically operated by a separate control unit ( 70 in FIG. 7 ).

Preferably, the outer wall of the hopper 10 may have a built-in hopper heating wire 12 . The hopper hot wire 12 heats the sand put into the hopper 10 and first dries it. The primary drying by the hopper hot wire 12 can reduce the drying time required in the transfer module 20 by improving the degree of drying of the input sand. Accordingly, it is possible to increase the transport speed in the transport module 20 or to reduce the size (length) of the transport module 20 .

Preferably, although not shown in the drawings, a hopper screw disposed in the vertical direction may be provided at the center of the hopper 10 . The hopper screw may be disposed to be spaced apart from the outer wall of the hopper 10 by a predetermined distance. Therefore, among the sand put into the hopper 10, the sand at the center of the inner space of the hopper moves upward by the hopper screw, and the sand at the edge of the inner space of the hopper moves downward without being affected by the hopper screw.

That is, among the sand put into the hopper 10, the sand that is greatly affected by the heating and drying of the hopper hot wire 12 close to the outer wall of the hopper 10 having the hopper hot wire 12 built-in passes downward to the transfer module 20. The sand that is discharged and is relatively far from the outer wall of the hopper 10 and is less affected by the heating and drying of the hopper hot wire 12 is not discharged to the transfer module 20 but is transferred upward by the hopper screw and pushed toward the outer wall of the hopper 10 The hopper 10 moves downward through a path close to the outer wall. Therefore, the primary drying by the hopper hot wire 12 can be made evenly regardless of the position of the sand put into the hopper 10.

3 is a view showing a schematic view of a transfer module and a heating module according to an embodiment of the present invention.

As described above, the transfer module 20 transfers the sand discharged from the hopper 10 to the sand blasting module 50 , and the heating module 30 may heat and dry the sand being transferred from the transfer module 20 . . At this time, if the sand discharged from the hopper 10 to the transfer module 20 is primarily dried sand in the hopper 10 , the primary dried sand is transferred from the transfer module 20 to the heating module 30 . It may be secondary dried by heat drying.

3, the sand introduced to one side of the transfer module 20 through the gate valve 11 of the hopper is transferred by the transfer screw 21 provided in the transfer module 20 to the transfer module ( 20) is transferred to the other side. In addition, a transfer outlet 22 for discharging the transferred sand toward the sand blasting module 50 may be formed at the lower end of the other side of the transfer module 20 .

On the other hand, the heating module 30 may include a transfer heating wire 31 disposed to surround the circumference of the transfer module 20 . Specifically, the transfer hot wire 31 may be disposed to surround some sections of the transfer path of the transfer module 20 . The transfer heating wire 31 may secondary dry the sand transferred along the transfer module 20 through heating.

4 is a view schematically showing a separation module and a sand blasting module according to an embodiment of the present invention.

As described above, the dry sand supplied to the sand blasting module 50 is dry sand of less than a predetermined volume, and for this purpose, the separation module 40 may separate the dry sand transferred from the transfer module 20 according to the volume. .

To this end, the separation module 40 includes a separation net 41 for separating the dry sand according to the volume, and a guide plate 42 for transporting and supplying the separated dry sand less than a predetermined volume to the sand blasting module 50 . can be configured.

4 , the separation net 41 may have one side disposed below the transfer outlet 22 so that the dry sand discharged from the transfer outlet 22 of the transfer module is seated. The dry sand discharged from the transfer outlet 22 is seated on the upper side of the separation net 41, and the dry sand S1 less than a predetermined volume among the dry sand seated on the upper side of the separation net 41 passes to the lower side, and the predetermined volume A plurality of holes having a predetermined volume may be formed to prevent the above dry sand S2 from passing through.

Preferably, the separation net 41 may be formed to be inclined at a predetermined angle so that the dry sand S2 of a predetermined volume or more that does not pass downward falls from one side and is discharged to the outside. In this case, the dry sand S2 discharged to the outside may also contain foreign substances having a volume greater than or equal to a predetermined volume.

Preferably, the separation module 40 may be provided with a vibration module that promotes the separation of the dry sand according to the volume and generates vibrations so that the dry sand of a predetermined volume or more (S2) moves to one side along the slope.

Meanwhile, the dry sand S1 having less than a predetermined volume passing through the separation net 41 may be supplied to the sand blasting module 50 through the guide plate 42 . The guide plate 42 is disposed below the separation net 41 so that the dry sand S1 of less than a predetermined volume that has passed through the separation net 41 is seated, and the settled dry sand S1 is transferred to the sand blasting module 50 . It may be disposed to be inclined downward at a predetermined angle toward the sand blasting module 50 to be supplied. When the separation module 40 is provided with a vibration module, the guide plate 42 is also affected by vibrations generated from the vibration module, and this vibration causes the sand S1 of less than a predetermined volume on the guide plate 42 to form a sandblasting module. moving towards (50) can be facilitated.

As described above, the separation module 40 according to the present embodiment separates only the sand S1 of less than a predetermined volume from the dry sand so that the sandblasting module 50 can spray the dry sand S1 of less than a predetermined volume, and then sprays the sand. It can be supplied to the module (50). Therefore, the dry sand spraying device according to the present embodiment can spray only dry sand of less than a predetermined volume, and thus the spraying range of the dry sand can be improved, the fire-fighting efficiency can be improved, and the sand (stones) of a predetermined volume or more Injuries or damage caused by spraying together can be prevented.

The sand spraying module 50 may spray the supplied dry sand through compressed air as described above. To this end, the sand spray module 50 includes a spray hose 51 that forms a guide path to spray the dry sand supplied from the guide plate 42 toward a target point, and dry sand spray through the spray hose 51 . An air pump 52 that is connected to the injection hose 51 to generate compressed air may be provided as possible.

Preferably, the sand blasting module 50 may further include a pump heating wire for heating the compressed air generated by the air pump 52 to generate the compressed air in an overheated state. The compressed air overheated by the pump heating wire has an effect of finally heating and drying the dry sand sprayed through the spray hose 51 .

5 is a diagram illustrating a state in which sand of a predetermined size or larger is separated and discharged from the sand blasting module according to an embodiment of the present invention, and FIG. 6 is a view showing the operation of the fan of the sand blasting module according to an embodiment of the present invention is a diagram showing

As described above, of the dry sand transferred through the transfer module 20 , the dry sand of a predetermined volume or more does not pass through the separation net 41 and is separated and discharged to one side. However, the dry sand S2 of a predetermined volume or more separated and discharged in this way falls from one side of the separation net 41 and is accumulated at the dropping point a, as shown in FIG. 5 . In addition, when sand is excessively accumulated at the falling point (a), there is a problem that an obstacle may be formed and the fire suppression operation may be hindered.

In order to solve this problem, the separation module 40 according to the present embodiment may include a fan 43 for generating wind toward the falling point a.

The fan 43 of the separation module operates to disperse a predetermined volume or more of the dry sand accumulated at the falling point a, or the dry sand over a predetermined volume falling toward the falling point a is dispersed to the falling point a. You can prevent it from accumulating.

Accordingly, the dry sand spraying device according to the present embodiment can reduce the formation of obstacles in which the separated and discharged sand is excessively accumulated at a specific location, and it is possible to prevent the fire suppression operation from being disturbed by the formed sand obstacles.

7 is a functional block diagram of a drying yarn manufacturing and spraying apparatus according to an embodiment of the present invention.

If the sand drying time in the dry sand spraying device according to this embodiment is too short, the sand that is not dried enough is sprayed and an explosion may occur in the process of extinguishing a metal fire. If the sand drying time is too long, the dry sand Production can be so low that it can cause difficulties in extinguishing metal fires.

In order to overcome such a problem, the dry sand spraying device according to the present embodiment can measure the moisture content of the sand put into the hopper 10 and adjust the drying time according to the measured moisture content.

To this end, the dry sand spraying device according to the present embodiment includes a moisture measuring module 60 for measuring the moisture content of the sand input into the hopper 10, and a drying time required until the moisture content of the input sand becomes less than a predetermined value. It may further include a control unit 70 for controlling the transfer speed of the transfer module 20 according to the calculated and calculated drying time.

More specifically, referring to FIG. 7 , the moisture measuring module 60 measures the moisture content of the sand input into the hopper 10 , and the control unit 70 controls the moisture content of the input sand measured by the moisture measuring module 60 . Based on the moisture content, it is possible to calculate the drying time required until the moisture content of the input sand becomes less than a predetermined value.

Specifically, the moisture measurement module 60 is provided separately to measure the amount of moisture contained in the sand (sand to be put into the hopper) around the metal fire site, or the sand disposed inside the hopper 10 and put into the hopper 10 . moisture content can be measured. Here, a moisture content measuring device may be applied as the moisture measuring module 60 .

The control unit 70 may calculate the drying time in proportion to the measured moisture content of the sand, and the higher the moisture content of the sand put into the hopper 10, the longer the drying process may be performed. Here, the drying time calculated by the control unit 70 may be calculated differently depending on conditions such as the scale of the drying sand spraying device and the output temperature of each of the heating wires 12 and 31 provided for sand drying.

When the drying time is calculated, the control unit 70 may operate and control the conveying screw 21 so that the drying time of the sand on the conveying module 20 is adjusted according to the calculated drying time. Specifically, the controller 70 may control the transport speed of the transport module 20 by controlling the rotation speed of the transport screw 21 that transports sand from the transport module 20 .

When the drying time is calculated, the control unit 70 may control the rotation speed of the conveying screw 21 so that the sand can be dried during the drying time calculated by the conveying module 20 . For a specific example, assuming that the length of the transport drying section in which sand is dried in the transport module 20 and transported is 1 m, when the calculated drying time is 10 seconds, the control unit 70 controls the sand on the transport module 20 to The rotational speed of the conveying screw 21 may be controlled so that the conveying speed of the conveying module 20 is 0.1 m/s so that it can be dried for seconds.

In this case, the degree of drying of the sand on the transport module 20 may be determined not only by the transport speed of the sand but also by the transport amount per unit time. Therefore, the dry sand spraying device according to the present embodiment can control the amount of sand flowing into the transfer module 20 per unit time according to the moisture content of the sand.

To this end, the control unit 70 of the dry sand spraying apparatus according to the present embodiment operates the gate valve 11 to control the degree of opening of the hopper 10, and through this, the sand flows into the transfer module 20 per unit time. amount can be adjusted.

The control unit 70 may control the degree of opening of the hopper 10 based on the moisture content of the sand measured by the moisture measurement module 60, but preferably, the degree of opening of the hopper 10 based on the calculated drying time. can control This is because the drying time is a value calculated by applying conditions such as the moisture content of the sand input into the hopper 10 as well as the scale of the dry sand spraying device and the output temperature of each heating wire provided for sand drying.

The control unit 70 may adjust the degree of opening of the hopper 10 in inverse proportion to the calculated drying time so that the amount of sand flowing into the transfer module 20 per unit time is inversely proportional to the calculated drying time. Therefore, when drying is required for a long time due to high moisture content of sand, less sand is introduced into the transfer module 20 per unit time to improve drying efficiency, and when drying for a short period of time is required due to low moisture content of sand, transfer By allowing a large amount of sand to flow into the module 20 per unit time, it is possible to improve the dry sand production efficiency.

However, when a relatively short drying time is calculated as described above and the amount of sand flowing into the transfer module 20 per unit time increases, drying is not sufficiently performed, and the sprayed sand contains more than a predetermined amount of moisture, which may cause an explosion during the firefighting process. To solve this problem, the dry sand spraying device according to the present embodiment may further include a dry sand moisture measuring module for measuring the moisture content of the dry sand sprayed from the sand spraying module 50 .

The dry sand moisture measuring module may be disposed on the spraying path of the sandblasting module 50 or provided separately to measure the moisture content of the dry sand sprayed through the sandblasting module 50 after the drying process is completed. . Here, the dry yarn moisture measurement module may also be applied with a moisture content meter similar to the moisture measurement module 60 .

At this time, as described above, dry sand of a predetermined volume or more among the dry sand transferred from the transfer module 20 is accumulated at the dropping point. It is possible to measure the amount of moisture contained in the dry sand of a predetermined volume or more. This is to prevent the measured value of the dry sand moisture measuring module from being affected by the compressed air sprayed together during the dry sand spraying process by the sand spraying module 50 . Preferably, when the dry sand moisture measuring module is disposed at the dropping point, the fan 43 of the separation module may be disposed toward the space above the falling point at a predetermined height in order to improve the accuracy of the measurement value.

When the moisture content of the dry sand is measured by the dry sand moisture measurement module, the controller 70 may recalculate the drying time based on the measured value of the moisture content of the dry sand.

Specifically, when the moisture content of the dry sand exceeds the reference content, the controller 70 may extend the drying time by adding the reference time to the calculated drying time. And when the drying time is extended and recalculated, the control unit 70 changes the conveying speed of the conveying module 20 according to the recalculated drying time to control it again, and the control unit 70 controls the hopper 10 according to the recalculated drying time. ) can be controlled again by changing the degree of opening.

With these configurations, the dry sand spraying device according to the present embodiment can produce sufficiently dry sand regardless of the humidity condition of the surrounding sand by automatically adjusting the heating and drying time of the sand according to the humidity of the input sand, and at the same time, the surrounding sand When the humidity is low, it has the effect of enabling the rapid production of dry sand.

The above description is merely illustrative of the technical spirit of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

10: Hopper
11: Gate valve
12: hopper heated wire
20: transfer module
21: feed screw
22: transfer outlet
30: heating module
31: transfer hot wire
40: separation module
41: separation net
42: guide plate
43: fan
50: sandblasting module
51: spray hose
52: air pump
60: moisture measurement module
70: control unit

Claims (6)

hopper into which sand is fed;
sand blasting module for blasting dry sand;
a transfer module for transferring the sand input through the hopper toward the sand blasting module; and
Dry sand manufacturing and spraying device, characterized in that it comprises a heating module for drying by heating the sand being transferred in the transfer module.
The method of claim 1,
The heating module is a drying yarn manufacturing and spraying device, characterized in that it comprises a transfer heating wire disposed to surround the circumference of the transfer module.
According to claim 1, wherein the drying yarn manufacturing and spraying device
Dry sand manufacturing and spraying apparatus according to claim 1, further comprising a separation module for separating the dry sand transferred by the transfer module according to a volume and supplying the dry sand less than a predetermined volume separated by the transfer module to the sand blasting module.
4. The method of claim 3, wherein the separation module is
a separation net disposed so that the dry sand transferred from the transfer module is seated on the upper side and passing the dry sand less than a predetermined volume among the settled dry sand to the lower side; and
A guide plate disposed below the separation net to allow the dry sand of less than a predetermined volume that has passed through the separation net to settle, and to be inclined downward at a predetermined angle toward the sandblasting module so that the settled dry sand is transferred and supplied to the sandblasting module. Drying yarn manufacturing and spraying device comprising a.
5. The method of claim 4,
The separation net is formed to be inclined at a predetermined angle so that the dry sand of a predetermined volume or more that does not pass downward falls from one side and is discharged to the outside;
Drying yarn manufacturing and spraying device, characterized in that the separation module is provided with a vibration module for generating vibrations in the separation net and the guide plate.
6. The method of claim 5,
The separation module is a dry sand manufacturing and spraying device, characterized in that it comprises a fan that blows the wind toward the point where the dry sand of a predetermined volume or more discharged to the outside falls.

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